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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3013888406158363 7.0796e-08  
a 2.641271565615479 1.0045e-08 au
q 1.845221790703055 1.8574e-07 au
i 12.67079457093669 5.9854e-06 deg
node 342.7653607164896 2.3171e-05 deg
peri 22.51984823422486 2.4265e-05 deg
M 230.9956382064259 7.0095e-06 deg
tp 2459562.349378394084
(2021-Dec-13.84937839)
3.2165e-05 TDB
period 1567.898739311816
4.29
8.944e-06
2.449e-08
d
yr
n .2296066646230047 1.3098e-09 deg/d
Q 3.437321340527904 1.3072e-08 au
  Orbit Determination Parameters
   # obs. used (total)      939  
   data-arc span      10460 days (28.64 yr)  
   first obs. used      1991-09-04  
   last obs. used      2020-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50032  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:34:08  

Additional Information
 Earth MOID = .848621 au 
 Jupiter MOID = 2.056 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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