2324 Janice: Difference between revisions
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{{Short description|Dark background asteroid from the outer regions of the asteroid belt}} |
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{{Use dmy dates|date=March 2018}} |
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{{Infobox planet |
{{Infobox planet |
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=== Rotation period === |
=== Rotation period === |
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In October 2010, a rotational [[lightcurve]] of ''Janice'' was obtained from photometric observations by Gordon Gartrelle at the [[University of North Dakota]] Observatory in Grand Forks {{Obscode|730}}. Lightcurve analysis gave a tentative [[rotation period]] of 23.2 hours with a brightness amplitude of 0.19 [[Magnitude (astronomy)|magnitude]] ({{small|[[LCDB quality code|U=2-]]}}).<ref name="Gartrelle-2012" /> As of |
In October 2010, a rotational [[lightcurve]] of ''Janice'' was obtained from photometric observations by Gordon Gartrelle at the [[University of North Dakota]] Observatory in Grand Forks {{Obscode|730}}. Lightcurve analysis gave a tentative [[rotation period]] of 23.2 hours with a brightness amplitude of 0.19 [[Magnitude (astronomy)|magnitude]] ({{small|[[LCDB quality code|U=2-]]}}).<ref name="Gartrelle-2012" /> As of 2018, no secure period has been obtained.<ref name="lcdb" /> |
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=== Diameter and albedo === |
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According to the surveys carried out by the Japanese [[Akari (satellite)|Akari satellite]] and the [[NEOWISE]] mission of NASA's [[Wide-field Infrared Survey Explorer]], ''Janice'' measures between 24.33 and 31.19 kilometers in diameter and its surface has an [[astronomical albedo|albedo]] between 0.038 and 0.093.<ref name="Nugent-2016" /><ref name="AKARI" /><ref name="Nugent-2015" /><ref name="WISE" /><ref name="Masiero-2011" /><ref name="Masiero-2012" /> |
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The ''Collaborative Asteroid Lightcurve Link'' assumes an albedo of 0.08 and calculates a diameter of 23.55 kilometers based on an [[absolute magnitude]] of 11.5.<ref name="lcdb" /> |
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== Naming == |
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This [[minor planet]] was named after Janice Cline, who for many years has encouraged [[astrometric]] studies of minor planets at [[Caltech]].<ref name="MPC-object" /> The official naming citation was published by the [[Minor Planet Center]] on 1 March 1981 ({{small|[[Minor Planet Circulars|M.P.C.]] 5850}}).<ref name="MPC-Circulars-Archive" /> |
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== References == |
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{{reflist|30em|refs= |
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<ref name="jpldata">{{cite web |
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|type = 2018-02-25 last obs. |
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|title = JPL Small-Body Database Browser: 2324 Janice (1978 VS4) |
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|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002324 |
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|publisher = [[Jet Propulsion Laboratory]] |
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|access-date = 26 March 2018}}</ref> |
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<ref name="MPC-object">{{cite web |
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|title = 2324 Janice (1978 VS4) |
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|work = Minor Planet Center |
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|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2324 |
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|access-date = 26 March 2018}}</ref> |
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<ref name="MPC-Circulars-Archive">{{cite web |
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|title = MPC/MPO/MPS Archive |
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|work = Minor Planet Center |
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|url = https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html |
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|access-date = 26 March 2018}}</ref> |
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<ref name="Masiero-2011">{{cite journal |
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|display-authors = 6 |
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|first1 = Joseph R. |last1 = Masiero |
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|first2 = A. K. |last2 = Mainzer |
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|first3 = T. |last3 = Grav |
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|first4 = J. M. |last4 = Bauer |
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|first5 = R. M. |last5 = Cutri |
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|first6 = J. |last6 = Dailey |
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|first7 = P. R. M. |last7 = Eisenhardt |
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|first8 = R. S. |last8 = McMillan |
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|first9 = T. B. |last9 = Spahr |
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|first10 = M. F. |last10 = Skrutskie |
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|first11 = D. |last11 = Tholen |
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|first12 = R. G. |last12 = Walker |
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|first13 = E. L. |last13 = Wright |
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|first14 = E. |last14 = DeBaun |
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|first15 = D. |last15 = Elsbury |
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|first16 = T. IV |last16 = Gautier |
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|first17 = S. |last17 = Gomillion |
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|first18 = A. |last18 = Wilkins |
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|date = November 2011 |
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|title = Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters |
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|journal = The Astrophysical Journal |
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|volume = 741 |
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|issue = 2 |
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|page = 20 |
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|bibcode = 2011ApJ...741...68M |
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|doi = 10.1088/0004-637X/741/2/68 |
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|arxiv = 1109.4096 |
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|s2cid = 118745497 }}</ref> |
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<ref name="lcdb">{{cite web |
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|title = LCDB Data for (2324) Janice |
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|publisher = Asteroid Lightcurve Database (LCDB) |
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|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=2324%7CJanice |
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|access-date = 26 March 2018}}</ref> |
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<ref name="Masiero-2012">{{cite journal |
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|display-authors = 6 |
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|first1 = Joseph R. |last1 = Masiero |
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|first2 = A. K. |last2 = Mainzer |
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|first3 = T. |last3 = Grav |
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|first4 = J. M. |last4 = Bauer |
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|first5 = R. M. |last5 = Cutri |
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|first6 = C. |last6 = Nugent |
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|first7 = M. S. |last7 = Cabrera |
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|date = November 2012 |
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|title = Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids |
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|journal = The Astrophysical Journal Letters |
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|volume = 759 |
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|issue = 1 |
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|page = 5 |
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|bibcode = 2012ApJ...759L...8M |
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|doi = 10.1088/2041-8205/759/1/L8 |
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|arxiv = 1209.5794 |
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|s2cid = 46350317 }}</ref> |
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<ref name="WISE">{{cite journal |
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|display-authors = 6 |
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|first1 = A. |last1 = Mainzer |
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|first2 = T. |last2 = Grav |
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|first3 = J. |last3 = Masiero |
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|first4 = E. |last4 = Hand |
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|first5 = J. |last5 = Bauer |
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|first6 = D. |last6 = Tholen |
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|first7 = R. S. |last7 = McMillan |
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|first8 = T. |last8 = Spahr |
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|first9 = R. M. |last9 = Cutri |
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|first10 = E. |last10 = Wright |
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|first11 = J. |last11 = Watkins |
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|first12 = W. |last12 = Mo |
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|first13 = C. |last13 = Maleszewski |
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|date = November 2011 |
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|title = NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results |
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|journal = The Astrophysical Journal |
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|volume = 741 |
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|issue = 2 |
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|page = 25 |
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|bibcode = 2011ApJ...741...90M |
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|doi = 10.1088/0004-637X/741/2/90 |
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|arxiv = 1109.6407 |
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|s2cid = 35447010 }}</ref> |
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<ref name="AKARI">{{cite journal |
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|display-authors = 6 |
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|first1 = Fumihiko |last1 = Usui |
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|first2 = Daisuke |last2 = Kuroda |
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|first3 = Thomas G. |last3 = Müller |
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|first4 = Sunao |last4 = Hasegawa |
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|first5 = Masateru |last5 = Ishiguro |
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|first6 = Takafumi |last6 = Ootsubo |
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|first7 = Daisuke |last7 = Ishihara |
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|first8 = Hirokazu |last8 = Kataza |
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|first9 = Satoshi |last9 = Takita |
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|first10 = Shinki |last10 = Oyabu |
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|first11 = Munetaka |last11 = Ueno |
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|first12 = Hideo |last12 = Matsuhara |
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|first13 = Takashi |last13 = Onaka |
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|date = October 2011 |
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|title = Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey |
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|journal = Publications of the Astronomical Society of Japan |
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|volume = 63 |
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|issue = 5 |
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|pages = 1117–1138 |
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|bibcode = 2011PASJ...63.1117U |
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|doi = 10.1093/pasj/63.5.1117 |
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}} ([http://vizier.cfa.harvard.edu/viz-bin/VizieR-5?-source=J/PASJ/63/1117/acua_v1&Num=2324 online], [https://core.ac.uk/download/pdf/43545172.pdf AcuA catalog p. 153])</ref> |
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<ref name="Nugent-2016">{{cite journal |
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|display-authors = 6 |
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|first1 = C. R. |last1 = Nugent |
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|first2 = A. |last2 = Mainzer |
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|first3 = J. |last3 = Bauer |
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|first4 = R. M. |last4 = Cutri |
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|first5 = E. A. |last5 = Kramer |
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|first6 = T. |last6 = Grav |
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|first7 = J. |last7 = Masiero |
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|first8 = S. |last8 = Sonnett |
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|first9 = E. L. |last9 = Wright |
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|date = September 2016 |
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|title = NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos |
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|journal = The Astronomical Journal |
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|volume = 152 |
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|issue = 3 |
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|page = 12 |
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|bibcode = 2016AJ....152...63N |
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|doi = 10.3847/0004-6256/152/3/63 |
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|arxiv = 1606.08923 |
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|doi-access = free }}</ref> |
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<ref name="Nugent-2015">{{cite journal |
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|display-authors = 6 |
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|first1 = C. R. |last1 = Nugent |
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|first2 = A. |last2 = Mainzer |
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|first3 = J. |last3 = Masiero |
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|first4 = J. |last4 = Bauer |
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|first5 = R. M. |last5 = Cutri |
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|first6 = T. |last6 = Grav |
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|first7 = E. |last7 = Kramer |
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|first8 = S. |last8 = Sonnett |
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|first9 = R. |last9 = Stevenson |
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|first10 = E. L. |last10 = Wright |
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|date = December 2015 |
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|title = NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos |
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|journal = The Astrophysical Journal |
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|volume = 814 |
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|issue = 2 |
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|page = 13 |
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|bibcode = 2015ApJ...814..117N |
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|doi = 10.1088/0004-637X/814/2/117 |
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|arxiv = 1509.02522 |
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|s2cid = 9341381 }}</ref> |
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<ref name="Gartrelle-2012">{{Cite journal |
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|author = Gartrelle, Gordon M. |
|author = Gartrelle, Gordon M. |
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|date = April 2012 |
|date = April 2012 |
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|first3 = Alan |last3 = Fitzsimmons |
|first3 = Alan |last3 = Fitzsimmons |
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|first4 = Larry |last4 = Denneau |
|first4 = Larry |last4 = Denneau |
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|first5 = Mikael |last5 = Granvik |
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|first6 = Bryce |last6 = Bolin |
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|first7 = Serge |last7 = Chastel |
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|first8 = Richard J. |last8 = Wainscoat |
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|first9 = William S. |last9 = Burgett |
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|first10 = Kenneth C. |last10 = Chambers |
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|first11 = Heather |last11 = Flewelling |
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|first12 = Nick |last12 = Kaiser |
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|first13 = Eugen A. |last13 = Magnier |
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|first14 = Jeff S. |last14 = Morgan |
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|first15 = Paul A. |last15 = Price |
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|first16 = John L. |last16 = Tonry |
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|first17 = Christopher |last17 = Waters |
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|date = November 2015 |
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|title = Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results |
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|journal = Icarus |
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|volume = 261 |
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|pages = 34–47 |
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|bibcode = 2015Icar..261...34V |
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|doi = 10.1016/j.icarus.2015.08.007 |
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|arxiv = 1506.00762 |
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|s2cid = 53493339 }}</ref> |
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<ref name="Ferret">{{cite web |
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|title = Small Bodies Data Ferret |
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|work = Nesvorny HCM Asteroid Families V3.0 |
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|url = https://sbntools.psi.edu/ferret/PropertySearch/familyForm.action |
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|access-date = 26 March 2018 |
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|archive-url = https://web.archive.org/web/20170802210005/http://sbntools.psi.edu/ferret/PropertySearch/familyForm.action |
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|archive-date = 2 August 2017 |
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}}</ref> |
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<ref name="AstDys-object">{{cite web |
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|title = Asteroid 2324 Janice – Proper Elements |
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|publisher = AstDyS-2, Asteroids – Dynamic Site |
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|url = https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=2324 |
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|access-date= 29 October 2019}}</ref> |
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}} <!-- end of reflist --> |
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== External links == |
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* [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }}) |
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* [https://books.google.com/books?id=aeAg1X7afOoC&pg Dictionary of Minor Planet Names], Google books |
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* [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend |
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* [https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000)] – Minor Planet Center |
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* {{AstDys|2324}} |
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* {{JPL small body}} |
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{{Minor planets navigator |2323 Zverev |number=2324 |2325 Chernykh}} |
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{{Small Solar System bodies}} |
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{{Authority control}} |
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{{DEFAULTSORT:Janice}} |
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[[Category:Background asteroids|002324]] |
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[[Category:Discoveries by Eleanor F. Helin]] |
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[[Category:Discoveries by Schelte J. Bus]] |
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[[Category:Named minor planets]] |
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[[Category:Astronomical objects discovered in 1978|19781107]] |
Latest revision as of 18:41, 24 December 2023
Discovery [1] | |
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Discovered by | E. F. Helin S. J. Bus |
Discovery site | Palomar Obs. |
Discovery date | 7 November 1978 |
Designations | |
(2324) Janice | |
Named after | Janice Cline [1] (Supporter at Caltech) |
1978 VS4 · 1929 WH 1934 VR · 1949 ME 1961 UP · 1971 OC1 1975 EM2 · 1977 RY4 A911 MC | |
main-belt [1][2] · (outer) background [3] · Themis [4][5] | |
Orbital characteristics [2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 83.28 yr (30,418 d) |
Aphelion | 3.6382 AU |
Perihelion | 2.5282 AU |
3.0832 AU | |
Eccentricity | 0.1800 |
5.41 yr (1,977 d) | |
245.72° | |
0° 10m 55.56s / day | |
Inclination | 0.3995° |
315.66° | |
305.63° | |
Physical characteristics | |
23.55 km (calculated)[4] 24.33±6.61 km[6] 24.44±1.22 km[7] 25.76±7.43 km[8] 28.463±0.354 km[9] 28.532±0.238 km[10] 28.9±15.91 km[11] 31.19±15.91 km[12] | |
23.2±0.1 h[11] | |
0.038±0.004[10] 0.050±0.040[12] 0.06±0.04[6] 0.0601±0.0049[9] 0.07±0.03[8] 0.08 (assumed)[4] 0.093±0.010[7] | |
C (assumed)[4] | |
11.30[7] · 11.40[8][9][12] 11.46±0.36[13] · 11.5[2][4] 11.68[6] | |
2324 Janice, provisional designation 1978 VS4, is a dark background asteroid from the outer regions of the asteroid belt, approximately 25 kilometers (16 miles) in diameter. It was discovered on 7 November 1978, by American astronomers Eleanor Helin and Schelte Bus at the Palomar Observatory in California.[1] The asteroid was named for Janice Cline at Caltech. The presumably C-type asteroid has a rotation period of 23.2 hours.[4]
Orbit and classification
[edit]Based on osculating Keplerian orbital elements, Janice is located in the region of the Themis family (602), a very large family of carbonaceous asteroids, named after 24 Themis.[4]
When applying the hierarchical clustering method to its proper orbital elements, the object is both a non-family asteroid of the main belt's background population (according to Nesvorný),[3] as well as a core member of the Themis family (according to Milani and Knežević).[5]
It orbits the Sun in the outer main-belt at a distance of 2.5–3.6 AU once every 5 years and 5 months (1,977 days; semi-major axis of 3.08 AU). Its orbit has an eccentricity of 0.18 and an inclination of 0° with respect to the ecliptic.[2] The body's observation arc begins with its first observation as A911 MC at Lowell Observatory in June 1911, more than 67 years prior to its official discovery observation at Palomar.[1]
Physical characteristics
[edit]Janice is a presumed carbonaceous C-type asteroid which is the overall spectral type of members of the Themis family (602).[4]
Rotation period
[edit]In October 2010, a rotational lightcurve of Janice was obtained from photometric observations by Gordon Gartrelle at the University of North Dakota Observatory in Grand Forks (730). Lightcurve analysis gave a tentative rotation period of 23.2 hours with a brightness amplitude of 0.19 magnitude (U=2-).[11] As of 2018, no secure period has been obtained.[4]
Diameter and albedo
[edit]According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Janice measures between 24.33 and 31.19 kilometers in diameter and its surface has an albedo between 0.038 and 0.093.[6][7][8][9][10][12]
The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.08 and calculates a diameter of 23.55 kilometers based on an absolute magnitude of 11.5.[4]
Naming
[edit]This minor planet was named after Janice Cline, who for many years has encouraged astrometric studies of minor planets at Caltech.[1] The official naming citation was published by the Minor Planet Center on 1 March 1981 (M.P.C. 5850).[14]
References
[edit]- ^ a b c d e f "2324 Janice (1978 VS4)". Minor Planet Center. Retrieved 26 March 2018.
- ^ a b c d "JPL Small-Body Database Browser: 2324 Janice (1978 VS4)" (2018-02-25 last obs.). Jet Propulsion Laboratory. Retrieved 26 March 2018.
- ^ a b "Small Bodies Data Ferret". Nesvorny HCM Asteroid Families V3.0. Archived from the original on 2 August 2017. Retrieved 26 March 2018.
- ^ a b c d e f g h i j "LCDB Data for (2324) Janice". Asteroid Lightcurve Database (LCDB). Retrieved 26 March 2018.
- ^ a b "Asteroid 2324 Janice – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
- ^ a b c d Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63.
- ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
- ^ a b c d Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. S2CID 9341381.
- ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID 35447010.
- ^ a b c Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J.; et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal. 741 (2): 20. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. S2CID 118745497.
- ^ a b c Gartrelle, Gordon M. (April 2012). "Lightcurve Results for Eleven Asteroids". The Minor Planet Bulletin. 39 (2): 40–46. Bibcode:2012MPBu...39...40G. ISSN 1052-8091.
- ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. S2CID 46350317.
- ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID 53493339.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 26 March 2018.
External links
[edit]- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 2324 Janice at AstDyS-2, Asteroids—Dynamic Site
- 2324 Janice at the JPL Small-Body Database