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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 
[ 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. 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 1.92908929366994 1.92908897204096 1.92908961529892 1.42416571770619 1.07242252712077 2415935.596764836 0.700395795114578 161.137826470086 78.9102658797515 14.2336116954584 1730331.9385899 T 96 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:20 2020-Nov-13 04:34
1962-Jun-15 12:38 < 00:01 Jupiter 1.95343916393365 1.95343883536997 1.95343949249698 1.30013922429255 0.907276385128973 2437831.026729491 0.316814416881757 161.053953318845 138.146287620747 38.5486881096779 2476584.34970545 T 96 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:20 2020-Nov-13 04:34
2008-Oct-25 12:55 < 00:01 Jupiter 1.98659358418759 1.98659326696683 1.98659390140846 1.87417009757712 1.63088164951296 2454765.038059123 0.14733109331927 53.2571385990108 36.4338784555131 68.3386241614563 2293520.4059979 T 96 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:20 2020-Nov-13 04:34
2068-Oct-02 15:22 < 00:01 Jupiter 1.92620440163547 1.92620408504158 1.92620471822947 1.22942488303399 0.794992077911488 2476657.140148987 0.488480305943715 289.441630815036 142.326748053641 15.7185166117972 2120254.90981548 T 96 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:20 2020-Nov-13 04:34
2128-Sep-16 13:34 < 00:01 Jupiter 1.95839286823789 1.95839245476694 1.95839328170806 1.44058346860539 1.10011942796905 2498555.065492964 0.910828356985088 179.826875539536 116.224129216468 -19.506151241527 1384107.81783368 T 96 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:20 2020-Nov-13 04:34
2175-Jan-26 21:10 00:01 Jupiter 1.97478139650638 1.97478093652575 1.97478185648644 1.60963263492332 1.31646418462303 2515488.381855031 1.20436975860953 123.932990362815 57.7961964799403 34.2327975817765 1554116.91196163 T 96 CATAB v2.0f-lin.ifort 2020-Nov-13 04:34:20 2020-Nov-13 04:34

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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