Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ hide orbit diagram ]

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 
[ 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 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1902-Jul-05 02:19 < 00:01 Jupiter 1.92908926375828 1.9290889449786 1.92908958253795 1.42416628540256 1.0724232769288 2415935.596642485 0.69594847966222 160.2749361658 78.8126906565792 14.186226835731 1738016.94485405 T 102 CATAB v2.0g-lin.ifort 2021-Aug-25 21:03:45 2021-Aug-25 21:03
1962-Jun-15 12:39 < 00:01 Jupiter 1.95343918174524 1.95343885591393 1.9534395075761 1.30013934097938 0.907276559340648 2437831.026790063 0.316110867489058 159.885994044822 137.295168198394 37.5116560985305 2488922.51617563 T 102 CATAB v2.0g-lin.ifort 2021-Aug-25 21:03:45 2021-Aug-25 21:03
2008-Oct-25 12:55 < 00:01 Jupiter 1.98659355972272 1.98659324494543 1.98659387450023 1.87417055614695 1.63088217471507 2454765.038034711 0.144146102481494 52.7512038137512 36.3699235407261 68.0629648288731 2298778.75486955 T 102 CATAB v2.0g-lin.ifort 2021-Aug-25 21:03:45 2021-Aug-25 21:03
2068-Oct-02 15:21 < 00:01 Jupiter 1.92620441738325 1.92620410312756 1.92620473163905 1.22942591504626 0.794993681455944 2476657.139615157 0.47981216201075 288.767303046213 140.376196979807 15.4108897559235 2122349.57128861 T 102 CATAB v2.0g-lin.ifort 2021-Aug-25 21:03:45 2021-Aug-25 21:03
2128-Sep-16 13:32 < 00:01 Jupiter 1.95839233866775 1.95839193326584 1.95839274406899 1.44057768827113 1.10011175459085 2498555.063973053 0.897609474808631 176.610181661548 115.392074058398 -20.2491633041961 1414298.15951523 T 102 CATAB v2.0g-lin.ifort 2021-Aug-25 21:03:45 2021-Aug-25 21:03
2175-Jan-26 21:07 00:01 Jupiter 1.97478238918307 1.97478193419535 1.9747828441701 1.60964068290756 1.31647419040812 2515488.379531813 1.18822961163161 122.525198938156 57.5854323846004 33.9254130273606 1560090.83749788 T 102 CATAB v2.0g-lin.ifort 2021-Aug-25 21:03:45 2021-Aug-25 21:03

Alternate Designations
 A852 XA = 1938 CL = 1974 QT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-24 16:04 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin