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129 Antigone (A873 CA)
Classification: Main-belt Asteroid          SPK-ID: 2000129
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 101 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2125938211505525 2.8041e-08  
a 2.870358580056886 5.8175e-09 au
q 2.260138081450318 8.1291e-08 au
i 12.26692889364345 3.6048e-06 deg
node 135.6670023214545 1.5199e-05 deg
peri 111.2466527743924 1.7489e-05 deg
M 21.05579473255367 1.0478e-05 deg
tp 2458896.610466559626
(2020-Feb-17.11046656)
5.158e-05 TDB
period 1776.244141509961
4.86
5.4e-06
1.478e-08
d
yr
n .2026748415867927 6.1616e-10 deg/d
Q 3.480579078663453 7.0543e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3038  
   data-arc span      42844 days (117.30 yr)  
   first obs. used      1903-06-04  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49231  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:23:56  

Additional Information
 Earth MOID = 1.2805 au 
 Jupiter MOID = 1.75039 au 
 T_jup = 3.231 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.2   n/a MPO473762  
magnitude slope G 0.33   n/a PDS3 (MPC 17257) Fit
diameter diameter 113 km n/a Dunham occult. list: Wasserman et al. 1986 Yeomans E-mail 2001-Apr-04
rotation period rot_per 4.9572 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Scaltriti, F.; Zappala, V. (1977) Astron. Astrophys. 56, 7-11.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.]
[Magnusson, P. (1990) Icarus 85, 229-240.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1991) Icarus 89, 44-64.]
[De Angelis, G. (1995) Planet. Space Sci. 43, 649-682.]
[Foerster, I.; Potthoff, H. (2001) Minor Planet Bull. 28, 25-26.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Ruthroff, J.C. (2009) Minor Planet Bull. 36, 121-122.]
[Behrend, R. (2010) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Ruthroff, J. (2011) http://www.theastroimager.com/doyan_rose.htm]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
geometric albedo albedo 0.151   0.057 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.717   0.012 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=17; phase (min.=8.97, mean=14.32, max.=18.68) deg.
U-B UB 0.245   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=8.97, mean=14.63, max.=18.68) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

129 Antigone (A873 CA)          Discovered 1873-Feb-05 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1905-Aug-11 23:50 < 00:01 Jupiter 1.73628299420481 1.73628258070677 1.73628340770299 0.682375637586264 n/a 2417069.493372560 0.975680490661994 105.523190571529 20.0315950885244 -87.2954977923307 12949226.5012012 F 101 CATAB v2.0f-lin.ifort 2020-Oct-22 15:24:28 2020-Oct-22 15:24
1930-Aug-01 17:29 < 00:01 Jupiter 1.87968228009991 1.87968173823845 1.8796828219618 2.39786600235074 2.20193580127264 2426190.228399187 0.685891493304033 96.0355769348348 18.9420457391732 -84.9286148838324 1773495.71834201 T 101 CATAB v2.0f-lin.ifort 2020-Oct-22 15:24:28 2020-Oct-22 15:24
1987-Nov-11 13:34 < 00:01 Jupiter 1.81029573238274 1.8102953150136 1.81029614975177 1.89333977866063 1.62756011617491 2447111.065446771 0.247213730171326 57.2475970662871 40.5751036447115 -39.3572914950372 1950197.52461871 T 101 CATAB v2.0f-lin.ifort 2020-Oct-22 15:24:28 2020-Oct-22 15:24
2012-Nov-13 18:19 < 00:01 Jupiter 1.74801957212198 1.74801917043939 1.74801997380397 1.21362704779582 0.709766263634249 2456245.262900746 0.219639578417032 664.111496247007 145.955618143022 -8.32221740231346 1424911.35847874 T 101 CATAB v2.0f-lin.ifort 2020-Oct-22 15:24:28 2020-Oct-22 15:24
2037-Oct-16 18:29 < 00:01 Jupiter 1.9908778417481 1.99087743487823 1.99087824861797 3.16249414618137 3.02497366441145 2465348.270407977 0.355489964016011 62.3937113987543 13.3452364547282 -81.0313883036559 2902604.34116424 T 101 CATAB v2.0f-lin.ifort 2020-Oct-22 15:24:28 2020-Oct-22 15:24
2070-Feb-23 21:00 < 00:01 Jupiter 1.99766296679865 1.99766247380382 1.99766345979348 3.52167623901392 3.39914549539312 2477166.374889004 0.624885974407142 55.3564724125549 16.933149208251 -81.7558802997362 2668062.77770088 T 101 CATAB v2.0f-lin.ifort 2020-Oct-22 15:24:28 2020-Oct-22 15:24
2095-Feb-14 21:57 < 00:01 Jupiter 1.76396977086728 1.76396932174316 1.76397021999139 0.912066408375299 n/a 2486288.414721258 0.93367150149485 52.5446770971612 22.3687724767937 88.6693820125682 11791266.7532753 F 101 CATAB v2.0f-lin.ifort 2020-Oct-22 15:24:28 2020-Oct-22 15:24
2120-Feb-07 17:54 00:01 Jupiter 1.78857426748027 1.78857378911384 1.7885747458473 2.04872016173285 1.80280504392179 2495411.245706473 1.08753843260874 127.285152714059 46.4191888533403 84.969742789105 1467030.39086353 T 101 CATAB v2.0f-lin.ifort 2020-Oct-22 15:24:28 2020-Oct-22 15:24
2177-May-17 03:02 00:02 Jupiter 1.90776459823806 1.90776379470911 1.90776540176766 2.48294644998471 2.297182893531 2516329.626043775 1.66602493931798 112.131757002935 17.5315566202076 81.8703219057207 1627416.05252409 T 101 CATAB v2.0f-lin.ifort 2020-Oct-22 15:24:28 2020-Oct-22 15:24

Alternate Designations
 A873 CA = A878 CA = A907 BA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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