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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 102 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2338729707250987 2.9068e-08  
a 2.627502761325641 3.8425e-09 au
q 2.013000884946013 7.7102e-08 au
i 10.10575445652708 3.5391e-06 deg
node 66.81744029478436 1.852e-05 deg
peri 60.82129491545298 1.9896e-05 deg
M 160.0834164307387 7.9403e-06 deg
tp 2458704.737457736652
(2019-Aug-09.23745774)
3.3677e-05 TDB
period 1555.654675339542
4.26
3.4125e-06
9.343e-09
d
yr
n .2314138257717288 5.0763e-10 deg/d
Q 3.242004637705269 4.7412e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2509  
   data-arc span      60187 days (164.78 yr)  
   first obs. used      1856-10-19  
   last obs. used      2021-08-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53211  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:03:19  

Additional Information
 Earth MOID = 1.05077 au 
 Jupiter MOID = 1.92728 au 
 T_jup = 3.341 
[ hide covariance matrix ]
Orbital Elements at Epoch 2452590.5 (2002-Nov-12.0) TDB
Reference: JPL 102 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2338687733857665 2.9096e-08  
q 2.012530368506805 7.7246e-08 au
tp 2452480.198178895301
(2002-Jul-24.69817890)
3.134e-05 TDB
node 67.25029257835816 1.8385e-05 deg
peri 59.2491118390001 1.9837e-05 deg
i 10.14667830360821 3.5512e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2509  
   data-arc span      60187 days (164.78 yr)  
   first obs. used      1856-10-19  
   last obs. used      2021-08-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53211  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:03:19  

Additional Information
 Jupiter MOID = 1.92728 au 
 T_jup = 3.341 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.465525573873556E-16 -2.245702292744466E-15 -3.129053710441713E-14 9.321008418220231E-16 -2.720098906215318E-14 -8.975627256517234E-16
q -2.245702292744466E-15 5.966899308897464E-15 8.90189650129008E-14 -3.208850597016166E-15 7.460124688005726E-14 2.480408297585077E-15
tp -3.129053710441713E-14 8.90189650129008E-14 9.821874725521421E-10 -5.058473239395678E-12 2.435653932760027E-10 8.662888801976736E-13
node 9.321008418220231E-16 -3.208850597016166E-15 -5.058473239395678E-12 3.380124896312985E-10 -3.334787914132641E-10 -3.172186679266988E-13
peri -2.720098906215318E-14 7.460124688005726E-14 2.435653932760027E-10 -3.334787914132641E-10 3.935042083667714E-10 5.726951037394961E-13
i -8.975627256517234E-16 2.480408297585077E-15 8.662888801976736E-13 -3.172186679266988E-13 5.726951037394961E-13 1.26107622676096E-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 7.17   n/a MPO636060 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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