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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2452706.5 (2003-Mar-08.0) TDB
Reference: JPL 101 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2139754076922933 2.785e-08  
q 2.252576456254692 8.0581e-08 au
tp 2453555.859925970198
(2005-Jul-04.35992597)
4.4118e-05 TDB
node 136.4740812753079 1.5292e-05 deg
peri 108.3992291903054 1.7468e-05 deg
i 12.22635101969518 3.5982e-06 deg
  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
 Jupiter MOID = 1.75039 au 
 T_jup = 3.231 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.755974001884143E-16 -2.240628906954806E-15 4.646079057522412E-14 -2.86611608673011E-15 1.610097056187701E-14 -9.351423393464897E-17
q -2.240628906954806E-15 6.493341073523542E-15 -5.171419049874599E-14 8.951737081065931E-15 -3.398943418285565E-14 1.003704155160988E-15
tp 4.646079057522412E-14 -5.171419049874599E-14 1.946365836397917E-9 -1.605563758692599E-12 3.844425410884752E-10 1.591965415862853E-12
node -2.86611608673011E-15 8.951737081065931E-15 -1.605563758692599E-12 2.338430474660134E-10 -2.283684214188573E-10 -2.10164241682416E-12
peri 1.610097056187701E-14 -3.398943418285565E-14 3.844425410884752E-10 -2.283684214188573E-10 3.051251868567969E-10 2.219258586742106E-12
i -9.351423393464897E-17 1.003704155160988E-15 1.591965415862853E-12 -2.10164241682416E-12 2.219258586742106E-12 1.294712176032816E-11

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

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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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