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85191 (1991 RP4)
Classification: Main-belt Asteroid          SPK-ID: 2085191
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2588659797573971 4.7031e-08  
a 2.758439338786749 1.6472e-08 au
q 2.04437323675037 1.2668e-07 au
i 8.247868287371046 4.7724e-06 deg
node 228.2102396614802 3.4032e-05 deg
peri 118.9758618036962 3.5322e-05 deg
M 187.9903652460374 1.4141e-05 deg
tp 2460196.046739198709
(2023-Sep-08.54673920)
7.1327e-05 TDB
period 1673.376183393729
4.58
1.4989e-05
4.104e-08
d
yr
n .2151339331661179 1.927e-09 deg/d
Q 3.472505440823127 2.0736e-08 au
  Orbit Determination Parameters
   # obs. used (total)      738  
   data-arc span      10789 days (29.54 yr)  
   first obs. used      1991-09-07  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4764  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 08:06:14  

Additional Information
 Earth MOID = 1.05272 au 
 Jupiter MOID = 2.0635 au 
 T_jup = 3.278 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.05   n/a MPCxxxxx  
diameter diameter 3.809 km 0.897 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.134   0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

85191 (1991 RP4)          Discovered 1991-Sep-07 by Ueda, S., Kaneda, H. at Kushiro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1991 RP4 = 2000 OU38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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