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23 Thalia
Classification: Main-belt Asteroid          SPK-ID: 2000023
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 92 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2347517208472519 3.0531e-08  
a 2.625114956524263 4.5659e-09 au
q 2.008864703058333 8.1416e-08 au
i 10.11400161129155 3.6001e-06 deg
node 66.84478327814347 1.9035e-05 deg
peri 60.63248907163402 2.039e-05 deg
M 68.51282958773226 7.9545e-06 deg
tp 2458704.841533534307
(2019-Aug-09.34153353)
3.404e-05 TDB
period 1553.53455065455
4.25
4.0531e-06
1.11e-08
d
yr
n .2317296386155823 6.0458e-10 deg/d
Q 3.241365209990192 5.6378e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2251  
   data-arc span      59640 days (163.29 yr)  
   first obs. used      1856-10-19  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51988  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:14:48  

Additional Information
 Earth MOID = 1.04616 au 
 Jupiter MOID = 1.9289 au 
 T_jup = 3.342 
[ 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 6.95   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16
diameter diameter 107.53 km 2.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16
rotation period rot_per 12.312 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Yang, X.-y.; Zhang, Y.-y.; Li, X.-q. (1965) Acta Astron. Sin. 13, 66-74.]
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Lagerkvist, C.I.; Magnusson, P.; Williams, I.P.; Buontempo, M.E.; et al. (1988) Astron. Astrophys. Suppl. Ser. 73, 395-405.]
[Michalowski, T. (1993) Icarus 106, 563-572.]
[Hainaut-Rouelle, M.-C.; Hainaut, O.R.; Detal, A. (1995) Astron. Astrophys. Suppl. Ser. 112, 125-142.]
[Lagerkvist, C.-I.; Erikson, A.; Debehogne, H.; Festin, L.; et al. (1995) Astron. Astrophys. Suppl. Ser. 113, 115-129.]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Pilcher, F. (2010) Minor Planet Bull. 37, 21-24.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Viikinkoski, M.; Hanus, J.; Kaasalainen, M.; Marchis, F.; Durech, J. (2017) Astron. Astrophys. 607, A117.]
geometric albedo albedo 0.2536   0.011 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 16
B-V BV 0.859   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=1.62, mean=16.25, max.=28.78) deg.
U-B UB 0.442   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=4.51, mean=20.02, max.=28.78) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   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)

23 Thalia          Discovered 1852-Dec-15 by Hind, J. R. at London
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1938 CL = 1974 QT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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