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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .260643547093529 6.0568e-08  
a 2.75823741036827 1.987e-08 au
q 2.039320628003814 1.6388e-07 au
i 8.222586161590407 7.2602e-06 deg
node 228.394785371508 4.2379e-05 deg
peri 118.2963159615045 4.4579e-05 deg
M 162.5093689427714 1.482e-05 deg
tp 2456845.195978884750
(2014-Jul-06.69597888)
6.437e-05 JED
period 1673.192440352437
4.58
1.808e-05
4.95e-08
d
yr
n .2151575582807262 2.325e-09 deg/d
Q 3.477154192732726 2.5049e-08 au
  Orbit Determination Parameters
   # obs. used (total)      560  
   data-arc span      8948 days (24.50 yr)  
   first obs. used      1991-09-07  
   last obs. used      2016-03-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47746  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 18:56:52  

Additional Information
 Earth MOID = 1.04756 au 
 Jupiter MOID = 2.04774 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 15.1 mag n/a MPO366210  

85191 (1991 RP4)          Discovered 1991-Sep-07 by Ueda, S., Kaneda, H. at Kushiro
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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