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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456120.5 (2012-Jul-12.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1034023806803762 4.1238e-08  
q 2.839053389702059 1.3098e-07 au
tp 2455329.657622696836
(2010-May-13.15762270)
0.00010111 TDB
node 194.3477583803822 1.9319e-05 deg
peri 194.2343268051349 2.5858e-05 deg
i 10.08020827945906 4.7079e-06 deg
  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
 Jupiter MOID = 1.96113 au 
 T_jup = 3.170 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.700590126657771E-15 -5.372904329322553E-15 -4.366680088483781E-13 -1.417574462142032E-16 -8.078571839678796E-14 2.2257286857957E-15
q -5.372904329322553E-15 1.715501926606973E-14 1.619699498458505E-12 1.746720927412304E-15 3.032276823329046E-13 -7.043622684658619E-15
tp -4.366680088483781E-13 1.619699498458505E-12 1.022250943457081E-8 -1.189179316786631E-11 1.750564986330161E-9 -5.939495336272079E-13
node -1.417574462142032E-16 1.746720927412304E-15 -1.189179316786631E-11 3.732333765336778E-10 -3.689103197723198E-10 7.241119627066664E-12
peri -8.078571839678796E-14 3.032276823329046E-13 1.750564986330161E-9 -3.689103197723198E-10 6.6862115356733E-10 -7.246255732920633E-12
i 2.2257286857957E-15 -7.043622684658619E-15 -5.939495336272079E-13 7.241119627066664E-12 -7.246255732920633E-12 2.216399968155543E-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 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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