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85191 (1991 RP4)
Classification: Main-belt Asteroid          SPK-ID: 2085191
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2617976704625634 8.0946e-08  
a 2.755964556681392 4.1271e-08 AU
q 2.034459455864812 2.2776e-07 AU
i 8.22282750573333 1.3642e-05 deg
node 228.4809166021866 5.594e-05 deg
peri 118.0356972068344 6.3943e-05 deg
M 350.3425562085069 3.5243e-05 deg
tp 2456845.329981249619
(2014-Jul-06.82998125)
0.00016439 JED
period 1671.124740490721
4.58
3.7538e-05
1.028e-07
d
yr
n .2154237749447039 4.839e-09 deg/d
Q 3.477469657497971 5.2075e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      280  
   data-arc span      7950 days (21.77 yr)  
   first obs. used      1991-09-07  
   last obs. used      2013-06-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53376  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-06 13:56:03  

Additional Information
 Earth MOID = 1.04238 AU 
 T_jup = 3.278 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9 mag n/a MPO263966  

85191 (1991 RP4)          Discovered 1991-Sep-07 by Ueda, S., Kaneda, H. at Kushiro (399)
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1991 RP4 = 2000 OU38 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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