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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09983275174414785 4.1137e-08  
a 3.172470383332763 1.4571e-08 au
q 2.855753935137842 1.3051e-07 au
i 10.06584234277549 4.7007e-06 deg
node 194.291996468379 1.9351e-05 deg
peri 194.2644524363227 2.6319e-05 deg
M 211.8005422850217 1.9465e-05 deg
tp 2459450.147737397246
(2021-Aug-23.64773740)
0.0001141 TDB
period 2063.929181517474
5.65
1.4219e-05
3.893e-08
d
yr
n .1744245893821392 1.2016e-09 deg/d
Q 3.489186831527685 1.6025e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2529  
   data-arc span      34799 days (95.27 yr)  
   first obs. used      1924-06-25  
   last obs. used      2019-10-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51075  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:00:05  

Additional Information
 Earth MOID = 1.86047 au 
 Jupiter MOID = 1.96113 au 
 T_jup = 3.170 
[ 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 9.76   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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-January); 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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