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91562 (1999 RM231)
Classification: Main-belt Asteroid          SPK-ID: 2091562
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1250752917784986 3.6995e-08  
a 2.714669160617574 1.4028e-08 au
q 2.375131123271239 9.8493e-08 au
i 12.08074740912997 6.0961e-06 deg
node 35.4638742654198 1.8464e-05 deg
peri 76.99887781363759 3.0957e-05 deg
M 105.5621594943577 2.5601e-05 deg
tp 2458521.451421254085
(2019-Feb-06.95142125)
0.00011466 TDB
period 1633.705573802204
4.47
1.2664e-05
3.467e-08
d
yr
n .2203579431770892 1.7081e-09 deg/d
Q 3.054207197963908 1.5783e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1290  
   data-arc span      7587 days (20.77 yr)  
   first obs. used      1999-09-09  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50225  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:40:21  

Additional Information
 Earth MOID = 1.4261 au 
 Jupiter MOID = 2.15109 au 
 T_jup = 3.318 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO432453  
diameter diameter 3.977 km 0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.308   0.060 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91562 (1999 RM231)          Discovered 1999-Sep-09 by LONEOS at Anderson Mesa
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RM231 = 2000 XD26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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