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23 Thalia (A852 XA)
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2347517252651223 2.9204e-08  
a 2.625114956004941 4.2703e-09 au
q 2.008864691063506 7.7608e-08 au
i 10.11400359847305 3.5681e-06 deg
node 66.84479968136846 1.8655e-05 deg
peri 60.63247349055822 2.0053e-05 deg
M 68.51282979857849 7.8331e-06 deg
tp 2458704.841532712161
(2019-Aug-09.34153271)
3.3559e-05 TDB
period 1553.534550193551
4.25
3.7907e-06
1.038e-08
d
yr
n .2317296386843463 5.6543e-10 deg/d
Q 3.241365220946377 5.2727e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2398  
   data-arc span      59886 days (163.96 yr)  
   first obs. used      1856-10-19  
   last obs. used      2020-10-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53598  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:34:14  

Additional Information
 Earth MOID = 1.04616 au 
 Jupiter MOID = 1.9289 au 
 T_jup = 3.342 
[ hide covariance matrix ]
Orbital Elements at Epoch 2452424.5 (2002-May-30.0) TDB
Reference: JPL 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2340451690975738 2.9124e-08  
q 2.012564674467006 7.7407e-08 au
tp 2452480.336297189340
(2002-Jul-24.83629719)
3.1685e-05 TDB
node 67.26349709094582 1.8532e-05 deg
peri 59.28845031361185 2.0021e-05 deg
i 10.14768726196943 3.5777e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2398  
   data-arc span      59886 days (163.96 yr)  
   first obs. used      1856-10-19  
   last obs. used      2020-10-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53598  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:34:14  

Additional Information
 Jupiter MOID = 1.9289 au 
 T_jup = 3.342 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.481847144558138E-16 -2.252557514412841E-15 -3.015407342222163E-14 1.206929366280609E-15 -2.674492622973944E-14 -9.654215914277094E-16
q -2.252557514412841E-15 5.991917095751597E-15 8.160891372204573E-14 -3.648657890733965E-15 7.213515569550108E-14 2.658610616943391E-15
tp -3.015407342222163E-14 8.160891372204573E-14 1.003968557250835E-9 -4.966192746930873E-12 2.504442402097509E-10 7.899861482697885E-13
node 1.206929366280609E-15 -3.648657890733965E-15 -4.966192746930873E-12 3.434208425880998E-10 -3.387537581610373E-10 -1.158395682563583E-12
peri -2.674492622973944E-14 7.213515569550108E-14 2.504442402097509E-10 -3.387537581610373E-10 4.008282407769974E-10 1.37259941586262E-12
i -9.654215914277094E-16 2.658610616943391E-15 7.899861482697885E-13 -1.158395682563583E-12 1.37259941586262E-12 1.279969749082072E-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 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. 2020-October); 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.]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
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 (A852 XA)          Discovered 1852-Dec-15 by Hind, J. R. at London
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A852 XA = 1938 CL = 1974 QT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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