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6487 Tonyspear (1991 GA1)
Classification: Mars-crossing Asteroid          SPK-ID: 2006487
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3053343980078468 2.7465e-08  
a 2.356765675803395 4.3159e-09 au
q 1.637164046936409 6.6176e-08 au
i 21.2691949781079 4.2187e-06 deg
node 187.4741462446382 8.4813e-06 deg
peri 92.94512964474117 1.1734e-05 deg
M 329.0219161527062 8.0008e-06 deg
tp 2459114.216918762405
(2020-Sep-21.71691876)
2.9576e-05 TDB
period 1321.517849724653
3.62
3.6301e-06
9.939e-09
d
yr
n .2724140276084869 7.483e-10 deg/d
Q 3.076367304670381 5.6337e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1853  
   data-arc span      17211 days (47.12 yr)  
   first obs. used      1973-05-04  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47203  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:31:46  

Additional Information
 Earth MOID = .779943 au 
 Jupiter MOID = 2.46065 au 
 T_jup = 3.402 
[ 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 13.6   n/a MPO350854  
rotation period rot_per 74.91 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D.; Coley, D.R. (2013) Minor Planet Bull. 40, 203-204.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]

6487 Tonyspear (1991 GA1)          Discovered 1991-Apr-08 by Helin, E. F. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1991 GA1 = 1973 JB = 1988 RF8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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