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6585 O'Keefe (1984 SR)
Classification: Mars-crossing Asteroid          SPK-ID: 2006585
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3593719819891037 9.5483e-08  
a 2.370063059358881 1.4118e-08 au
q 1.518328800277921 2.2712e-07 au
i 22.38006052293362 1.7917e-05 deg
node .7108003497624221 1.9901e-05 deg
peri 60.08712236012455 2.9528e-05 deg
M 180.8243997384517 2.1827e-05 deg
tp 2458063.807100167534
(2017-Nov-06.30710017)
8.5174e-05 JED
period 1332.718047054074
3.65
1.1908e-05
3.26e-08
d
yr
n .2701246529945078 2.4136e-09 deg/d
Q 3.221797318439841 1.9191e-08 au
  Orbit Determination Parameters
   # obs. used (total)      475  
   data-arc span      16127 days (44.15 yr)  
   first obs. used      1971-03-24  
   last obs. used      2015-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52236  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:55:24  

Additional Information
 Earth MOID = .625115 au 
 Jupiter MOID = 2.56129 au 
 T_jup = 3.360 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3 mag n/a MPO337310  
SMASSII spectral type spec_B Sk   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)

6585 O'Keefe (1984 SR)          Discovered 1984-Sep-26 by Shoemaker, C. S., Shoemaker, E. M. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1984 SR = 1973 SF = 1973 SR5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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