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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2616616020749208 7.02e-08  
a 2.755455319729518 2.8396e-08 AU
q 2.034458466323229 1.9618e-07 AU
i 8.223219608354302 1.1061e-05 deg
node 228.4784339323935 5.0596e-05 deg
peri 118.0328804643209 5.5517e-05 deg
M 33.44024015791431 2.2085e-05 deg
tp 2456845.312987106208
(2014-Jul-06.81298711)
0.00010114 JED
period 1670.66158550129
4.57
2.5826e-05
7.071e-08
d
yr
n .2154834965526428 3.331e-09 deg/d
Q 3.476452173135806 3.5827e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      310  
   data-arc span      8427 days (23.07 yr)  
   first obs. used      1991-09-07  
   last obs. used      2014-10-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53051  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 16:42:32  

Additional Information
 Earth MOID = 1.04399 AU 
 T_jup = 3.279 
[ 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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