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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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2616616036298284 6.9167e-08  
a 2.755455318331249 2.3564e-08 AU
q 2.034458461006355 1.9101e-07 AU
i 8.22322082426726 1.0872e-05 deg
node 228.478443259377 4.825e-05 deg
peri 118.0328709331278 5.3158e-05 deg
M 33.44024091587028 1.9397e-05 deg
tp 2456845.312983706867
(2014-Jul-06.81298371)
8.9202e-05 JED
period 1670.661584229613
4.57
2.1431e-05
5.867e-08
d
yr
n .215483496716665 2.7642e-09 deg/d
Q 3.476452175656143 2.973e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      329  
   data-arc span      8455 days (23.15 yr)  
   first obs. used      1991-09-07  
   last obs. used      2014-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52462  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 15:27:52  

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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