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66 Maja (A861 GA)
Classification: Main-belt Asteroid          SPK-ID: 2000066
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 56 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1731413919778664 2.3486e-08  
a 2.644903703683259 5.126e-09 au
q 2.186961394780125 6.0862e-08 au
i 3.046288046830066 2.1183e-07 deg
node 7.494021003083913 5.7006e-06 deg
peri 43.84026632107883 9.0341e-06 deg
M 156.650195004839 3.2248e-06 deg
tp 2458516.837650666839
(2019-Feb-02.33765067)
1.3571e-05 TDB
period 1571.133989027817
4.30
4.5675e-06
1.251e-08
d
yr
n .2291338628749036 6.6612e-10 deg/d
Q 3.102846012586393 6.0136e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3469  
   data-arc span      58420 days (159.95 yr)  
   first obs. used      1861-04-10  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44577  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:48:11  

Additional Information
 Earth MOID = 1.198 au 
 Jupiter MOID = 2.27726 au 
 T_jup = 3.370 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.54   n/a E2021B10 IRAS observations used: 17
diameter diameter 71.82 km 5.3 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 17
rotation period rot_per 9.73509 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Barucci, M.A.; Fulchignoni, M.; Di Martino, M. (1989) Bull. Amer. Astron. Soc. 21, 963.]
[Di Martino, M.; Ferreri, W.; Fulchignoni, M.; De Angelis, G.; et al. (1990) Icarus 87, 372-376.]
[Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planet. Space Sci. 49, 657-671.]
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Ditteon, R.; Hawkins, S. (2007) Minor Planet Bull. 34, 59-64.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.016   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
B-V BV 0.697   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=2.85, mean=7.08, max.=9.86) deg.
U-B UB 0.360   0.046 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=2.85, mean=7.08, max.=9.86) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Ch   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)

66 Maja (A861 GA)          Discovered 1861-Apr-09 by Tuttle, H. P. at Cambridge
Apr. 10, given by some authorities, is the civil date.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A861 GA = 1947 FO = 1974 KR = 1992 OX10 = A902 UF = A906 QD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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