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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2616615797483283 7.3692e-08  
a 2.755455349379347 4.199e-08 AU
q 2.034458549734766 2.1363e-07 AU
i 8.223218001275985 1.1406e-05 deg
node 228.4784255488571 5.2511e-05 deg
peri 118.0328994469197 5.8272e-05 deg
M 33.44022032582939 3.0415e-05 deg
tp 2456845.313076636680
(2014-Jul-06.81307664)
0.00013837 JED
period 1670.661612466796
4.57
3.8188e-05
1.046e-07
d
yr
n .2154834930746066 4.9255e-09 deg/d
Q 3.476452149023929 5.2977e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      295  
   data-arc span      8346 days (22.85 yr)  
   first obs. used      1991-09-07  
   last obs. used      2014-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53622  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 15:51:46  

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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