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119 Althaea (A872 GA)
Classification: Main-belt Asteroid          SPK-ID: 2000119
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 87 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08086980484435136 3.2751e-08  
a 2.581815806161525 4.7905e-09 au
q 2.373024865773181 8.4253e-08 au
i 5.785666694323867 3.6523e-06 deg
node 203.6381560785825 3.6197e-05 deg
peri 171.3954440004604 4.2973e-05 deg
M 133.5217004933113 2.3433e-05 deg
tp 2458638.500843466744
(2019-Jun-04.00084347)
9.8336e-05 TDB
period 1515.257037653646
4.15
4.2173e-06
1.155e-08
d
yr
n .2375834535356819 6.6124e-10 deg/d
Q 2.790606746549869 5.1779e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3175  
   data-arc span      54338 days (148.77 yr)  
   first obs. used      1872-04-13  
   last obs. used      2021-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50616  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:43:35  

Additional Information
 Earth MOID = 1.37273 au 
 Jupiter MOID = 2.58352 au 
 T_jup = 3.412 
[ 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 8.35   n/a E2021B10 IRAS observations used: 17
diameter diameter 57.30 km 1.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
rotation period rot_per 11.484 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Gil Hutton, R. (1990) Minor Planet Bull. 17, 15-17.]
[Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1990) Icarus 86, 402-447.]
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Shevchenko, V.G.; Bel'skaya, I.N.; Krugly, Yu.N.; Chiorny, V.G.; Gaftonyuk, N.M. (2002) Icarus 155, 365-374.]
[Tungalag, N.; Shevchenko, V.G.; Lupishko, D.F. (2002) Kin. Fiz. Neb. Tel 18, 508-516; Kinematics and Physics of Celestial Bodies 18, ???-???.]
[Durech, J.; Kaasalainen, M.; Warner, B.D.; Fauerbach, M.; et al. (2009) Astron. Astrophys. 493, 291-297.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
geometric albedo albedo 0.2306   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
B-V BV 0.874   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.97, mean=6.52, max.=8.30) deg.
U-B UB 0.342   0.228 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.97, mean=6.52, max.=8.30) 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 Sl   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)

119 Althaea (A872 GA)          Discovered 1872-Apr-03 by Watson, J. C. at Ann Arbor
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A872 GA = 1972 KO 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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