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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3011614940688412 7.7198e-08  
a 2.641660620060413 1.034e-08 au
q 1.846094160900198 2.0212e-07 au
i 12.66898461703268 6.0985e-06 deg
node 342.7623120674478 2.3437e-05 deg
peri 22.56023197251376 2.4912e-05 deg
M 139.0943117385403 6.8394e-06 deg
tp 2457994.572268750602
(2017-Aug-29.07226875)
2.8684e-05 TDB
period 1568.245174970318
4.29
9.2075e-06
2.521e-08
d
yr
n .2295559430028622 1.3478e-09 deg/d
Q 3.437227079220628 1.3454e-08 au
  Orbit Determination Parameters
   # obs. used (total)      918  
   data-arc span      10073 days (27.58 yr)  
   first obs. used      1991-09-04  
   last obs. used      2019-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49915  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:21:15  

Additional Information
 Earth MOID = .84865 au 
 Jupiter MOID = 2.05268 au 
 T_jup = 3.296 
[ 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 14.6   n/a MPO379167  
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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