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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3593226057911437 9.5386e-08  
a 2.370646066605266 1.4167e-08 AU
q 1.518819344544136 2.269e-07 AU
i 22.37827525164161 1.7915e-05 deg
node .7113064642991894 1.9902e-05 deg
peri 60.13714754493657 2.9528e-05 deg
M 72.71327866059713 2.1141e-05 deg
tp 2456731.216506608576
(2014-Mar-14.71650661)
7.665e-05 JED
period 1333.209826411596
3.65
1.1951e-05
3.272e-08
d
yr
n .2700250124685615 2.4206e-09 deg/d
Q 3.222472788666395 1.9258e-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 = .626717 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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