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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 | 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 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1731413927805424 2.3507e-08  
a 2.644903701095385 5.1281e-09 au
q 2.186961390517319 6.0915e-08 au
i 3.046288035686668 2.1183e-07 deg
node 7.494021103172501 5.7017e-06 deg
peri 43.84026596537564 9.0403e-06 deg
M 156.650195740029 3.2259e-06 deg
tp 2458516.837648461659
(2019-Feb-02.33764846)
1.3578e-05 TDB
period 1571.133986721931
4.30
4.5693e-06
1.251e-08
d
yr
n .2291338632111934 6.6639e-10 deg/d
Q 3.102846011673451 6.016e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3461  
   data-arc span      58404 days (159.90 yr)  
   first obs. used      1861-04-10  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44614  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 10:33:18  

Additional Information
 Earth MOID = 1.198 au 
 Jupiter MOID = 2.27726 au 
 T_jup = 3.370 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457004.5 (2014-Dec-13.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1705573502007927 2.3312e-08  
q 2.195034033094871 6.0227e-08 au
tp 2456944.543652286747
(2014-Oct-14.04365229)
1.4094e-05 TDB
node 7.53723308673354 5.7036e-06 deg
peri 43.98358280240275 9.1281e-06 deg
i 3.046719998431533 2.1146e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3461  
   data-arc span      58404 days (159.90 yr)  
   first obs. used      1861-04-10  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44614  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 10:33:18  

Additional Information
 Jupiter MOID = 2.27726 au 
 T_jup = 3.370 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.434489028693991E-16 -1.400865756704163E-15 -1.803267419788725E-13 1.879523658815619E-14 -1.008369827030775E-13 -3.686123001132367E-16
q -1.400865756704163E-15 3.627231935240001E-15 4.656813737075277E-13 -4.644940259612086E-14 2.582516364203325E-13 1.014249595178547E-15
tp -1.803267419788725E-13 4.656813737075277E-13 1.986406650098005E-10 -4.109825655386314E-11 1.078718923584911E-10 -5.369474791235049E-14
node 1.879523658815619E-14 -4.644940259612086E-14 -4.109825655386314E-11 3.253113282063349E-11 -4.589341950906455E-11 4.193959683794847E-13
peri -1.008369827030775E-13 2.582516364203325E-13 1.078718923584911E-10 -4.589341950906455E-11 8.332253162892634E-11 -4.679938523820676E-13
i -3.686123001132367E-16 1.014249595178547E-15 -5.369474791235049E-14 4.193959683794847E-13 -4.679938523820676E-13 4.47137381410194E-14

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 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

[ show close-approach data ]
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 | Close-Approach Data ]
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