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85189 (1991 RL2)
Classification: Main-belt Asteroid          SPK-ID: 2085189
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3015074745415479 4.0918e-08  
a 2.642738284790969 8.8421e-09 au
q 1.845932938669382 1.1071e-07 au
i 12.67126983713892 4.6161e-06 deg
node 342.7563253794046 1.8285e-05 deg
peri 22.42255633336901 1.9278e-05 deg
M 322.0158284105666 5.981e-06 deg
tp 2459562.069302677656
(2021-Dec-13.56930268)
2.6425e-05 TDB
period 1569.204920623757
4.30
7.8754e-06
2.156e-08
d
yr
n .2294155436734805 1.1514e-09 deg/d
Q 3.439543630912555 1.1508e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1091  
   data-arc span      10932 days (29.93 yr)  
   first obs. used      1991-09-04  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49222  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 01:53:45  

Additional Information
 Earth MOID = .848434 au 
 Jupiter MOID = 2.0549 au 
 T_jup = 3.295 
[ 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 14.59   n/a MPO637170  
diameter diameter 3.608 km 0.882 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.215   0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85189 (1991 RL2)          Discovered 1991-Sep-04 by Helin, E. F. at Palomar
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1991 RL2 = 2000 XN41 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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