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91491 (1999 RA124)
Classification: Main-belt Asteroid          SPK-ID: 2091491
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2268953259019059 5.3889e-08  
a 2.774959248438934 1.8868e-08 au
q 2.145333965399874 1.4601e-07 au
i 6.150909272565787 5.1322e-06 deg
node 279.1720357228581 5.1504e-05 deg
peri 65.99017781069237 5.3163e-05 deg
M 177.7234727312069 1.8913e-05 deg
tp 2458166.961562673735
(2018-Feb-17.46156267)
8.2816e-05 TDB
period 1688.431093687292
4.62
1.7221e-05
4.715e-08
d
yr
n .2132156896102947 2.1746e-09 deg/d
Q 3.404584531477994 2.3149e-08 au
  Orbit Determination Parameters
   # obs. used (total)      728  
   data-arc span      9416 days (25.78 yr)  
   first obs. used      1994-07-08  
   last obs. used      2020-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53417  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:41:36  

Additional Information
 Earth MOID = 1.14669 au 
 Jupiter MOID = 2.06121 au 
 T_jup = 3.289 
[ 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 14.8   n/a MPO412707  
diameter diameter 5.293 km 0.435 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.083   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91491 (1999 RA124)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RA124 = 1994 NP2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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