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

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 72 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2111220661701018 3.1512e-08  
a 2.869930917901603 6.0829e-09 AU
q 2.264025172748759 9.0797e-08 AU
i 12.26294544882211 4.4135e-06 deg
node 135.7048979289437 1.7431e-05 deg
peri 110.9755004661652 2.0333e-05 deg
M 295.2716049421382 1.1661e-05 deg
tp 2457119.799272733294
(2015-Apr-07.29927273)
5.7777e-05 JED
period 1775.847185477598
4.86
5.6459e-06
1.546e-08
d
yr
n .2027201455981029 6.4451e-10 deg/d
Q 3.475836663054446 7.3671e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1915  
   data-arc span      40469 days (110.80 yr)  
   first obs. used      1903-06-04  
   last obs. used      2014-03-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62763  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:34:17  

Additional Information
 Earth MOID = 1.28443 AU 
 T_jup = 3.232 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.07 mag n/a PDS3 (MPC 17257)  
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 Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) Published Reference List:
[Scaltriti, F.; Zappala, V. (1977) Astron. Astrophys. 56, 7-11.]
[Magnusson, P. (1986) Icarus 68, 1-39.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1987) Icarus 70, 191-245.]
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.]
[Drummond, J.D.; Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R. (1988) Icarus 76, 19-77.]
[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 Bul. 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 Bul. 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.]
geometric albedo albedo 0.164   n/a EAR-A-5-DDR-ALBEDOS-V1.0:TRIAD IMPS quality code 2: from the PDS IMPS singleton file
B-V BV .717 mag .012 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=17; phase (min.=8.97, mean=14.32, max.=18.68) deg.
U-B UB .245 mag .027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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          Discovered 1873-Feb-05 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A878 CA = A907 BA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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