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1023 Thomana (A924 MC)
Classification: Main-belt Asteroid          SPK-ID: 2001023
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0976148788379039 3.7726e-08  
a 3.174589781449642 1.48e-08 au
q 2.864702584573387 1.2073e-07 au
i 10.05097471990827 4.2539e-06 deg
node 194.0016182668511 1.9172e-05 deg
peri 194.6323572401501 2.6388e-05 deg
M 281.218478453612 1.9704e-05 deg
tp 2459452.617910056107
(2021-Aug-26.11791006)
0.00011428 TDB
period 2065.997767310966
5.66
1.4447e-05
3.955e-08
d
yr
n .1742499462952296 1.2185e-09 deg/d
Q 3.484476978325896 1.6245e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2749  
   data-arc span      35055 days (95.98 yr)  
   first obs. used      1924-06-25  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4888  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:24:49  

Additional Information
 Earth MOID = 1.87019 au 
 Jupiter MOID = 1.96859 au 
 T_jup = 3.170 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456373.5 (2013-Mar-22.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1030693129328487 3.8007e-08  
q 2.841098995928423 1.2272e-07 au
tp 2457388.976808156131
(2016-Jan-01.47680816)
0.00010318 TDB
node 194.3477744032817 1.9102e-05 deg
peri 194.3368631894495 2.5597e-05 deg
i 10.07849480091724 4.2654e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2749  
   data-arc span      35055 days (95.98 yr)  
   first obs. used      1924-06-25  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4888  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:24:49  

Additional Information
 Jupiter MOID = 1.96859 au 
 T_jup = 3.170 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.4445266367958E-15 -4.6402797978589E-15 -6.691394096812438E-13 -7.387107130021051E-16 -9.988716172674837E-14 1.240037976289525E-15
q -4.6402797978589E-15 1.506114362481401E-14 2.483691918873663E-12 3.734429358044056E-15 3.584912542211365E-13 -4.038472847159264E-15
tp -6.691394096812438E-13 2.483691918873663E-12 1.064513853231245E-8 -8.412786050247192E-12 1.765989205771506E-9 7.453589262231344E-13
node -7.387107130021051E-16 3.734429358044056E-15 -8.412786050247192E-12 3.64873600050712E-10 -3.603503157324113E-10 4.758525901637724E-12
peri -9.988716172674837E-14 3.584912542211365E-13 1.765989205771506E-9 -3.603503157324113E-10 6.552003784390835E-10 -4.532645557512444E-12
i 1.240037976289525E-15 -4.038472847159264E-15 7.453589262231344E-13 4.758525901637724E-12 -4.532645557512444E-12 1.819341663168762E-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 10.0   n/a MPO492761 IRAS observations used: 11
diameter diameter 58.27 km 1.6 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
rotation period rot_per 17.56 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Brinsfield, J.W. (2010) Minor Planet Bull. 37, 50-53.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.0649   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 11
B-V BV 0.764   0.042 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=7.21, mean=7.39, max.=7.57) deg.
U-B UB 0.493   0.062 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=7.21, mean=7.39, max.=7.57) deg.
Tholen spectral type spec_T G   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo

1023 Thomana (A924 MC)          Discovered 1924-Jun-25 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A924 MC = 1936 RG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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