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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09690052287274574 1.827e-08  
a 3.171071724612144 1.214e-08 au
q 2.863793216430248 5.9862e-08 au
i 10.05857963598032 1.0706e-06 deg
node 193.9261694837065 2.1471e-06 deg
peri 195.1953678474711 1.0039e-05 deg
M 315.5687111529122 7.6456e-06 deg
tp 2459455.062211462409
(2021-Aug-28.56221146)
4.3804e-05 TDB
period 2062.564433857822
5.65
1.1844e-05
3.243e-08
d
yr
n .174540001800892 1.0023e-09 deg/d
Q 3.478350232794041 1.3316e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3211  
   data-arc span      35261 days (96.54 yr)  
   first obs. used      1924-06-25  
   last obs. used      2021-01-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45564  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:48:58  

Additional Information
 Earth MOID = 1.86823 au 
 Jupiter MOID = 1.97562 au 
 T_jup = 3.171 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456852.5 (2014-Jul-14.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1026220493670682 1.8591e-08  
q 2.843470996673732 6.1363e-08 au
tp 2457389.496996716348
(2016-Jan-01.99699672)
4.0908e-05 TDB
node 194.3299845182129 2.1425e-06 deg
peri 194.3432702169807 9.3364e-06 deg
i 10.07596499911394 1.0711e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3211  
   data-arc span      35261 days (96.54 yr)  
   first obs. used      1924-06-25  
   last obs. used      2021-01-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45564  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:48:58  

Additional Information
 Jupiter MOID = 1.97562 au 
 T_jup = 3.171 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.456395419975606E-16 -1.123941626308884E-15 2.319504788312809E-13 8.615215856528547E-15 5.60327468047301E-14 -8.436324891815901E-15
q -1.123941626308884E-15 3.765376857549915E-15 -8.381332022092627E-13 -2.85899260884747E-14 -2.008566697650816E-13 2.783007777737737E-14
tp 2.319504788312809E-13 -8.381332022092627E-13 1.673459076785772E-9 -1.795007385365556E-11 3.749830597281811E-10 1.407589203782288E-11
node 8.615215856528547E-15 -2.85899260884747E-14 -1.795007385365556E-11 4.59038527583549E-12 -7.241558890212086E-12 -8.61001393710225E-13
peri 5.60327468047301E-14 -2.008566697650816E-13 3.749830597281811E-10 -7.241558890212086E-12 8.716781773166503E-11 3.297573115310716E-12
i -8.436324891815901E-15 2.783007777737737E-14 1.407589203782288E-11 -8.61001393710225E-13 3.297573115310716E-12 1.147343144047059E-12

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 10.03   n/a E2021B10 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. 2020-October); 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.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
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

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