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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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3053343866053405 3.2513e-08  
a 2.356765673593292 5.9966e-09 au
q 1.637164072274162 7.6435e-08 au
i 21.26919486681545 4.3617e-06 deg
node 187.4741492488818 1.0914e-05 deg
peri 92.94512619202979 1.3386e-05 deg
M 329.0219190556595 1.0126e-05 deg
tp 2459114.216907946043
(2020-Sep-21.71690795)
3.7518e-05 TDB
period 1321.517847865734
3.62
5.0437e-06
1.381e-08
d
yr
n .2724140279916794 1.0397e-09 deg/d
Q 3.076367274912421 7.8276e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1478  
   data-arc span      17049 days (46.68 yr)  
   first obs. used      1973-05-04  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50678  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 20:27:38  

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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