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JPL Small-Body Database Browser
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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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3053343879701062 3.1168e-08  
a 2.356765673866561 5.7338e-09 au
q 1.63716406924756 7.3606e-08 au
i 21.26919488418999 4.3531e-06 deg
node 187.4741495221096 1.0562e-05 deg
peri 92.94512601222026 1.3084e-05 deg
M 329.0219187074458 9.8679e-06 deg
tp 2459114.216909244073
(2020-Sep-21.71690924)
3.6551e-05 TDB
period 1321.517848095581
3.62
4.8227e-06
1.32e-08
d
yr
n .2724140279442993 9.9414e-10 deg/d
Q 3.076367278485562 7.4845e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1530  
   data-arc span      17076 days (46.75 yr)  
   first obs. used      1973-05-04  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50027  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:04:35  

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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