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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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2616616015418576 6.8547e-08  
a 2.755455319379067 2.1458e-08 AU
q 2.03445846753331 1.8821e-07 AU
i 8.223221393607343 1.0846e-05 deg
node 228.4784553726681 4.5552e-05 deg
peri 118.032858963556 5.0592e-05 deg
M 33.44024047124538 1.8407e-05 deg
tp 2456845.312985681730
(2014-Jul-06.81298568)
8.4835e-05 JED
period 1670.661585182567
4.57
1.9515e-05
5.343e-08
d
yr
n .215483496593752 2.5171e-09 deg/d
Q 3.476452171224825 2.7073e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      391  
   data-arc span      8508 days (23.29 yr)  
   first obs. used      1991-09-07  
   last obs. used      2014-12-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50196  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 05:57:03  

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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