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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2268953426822833 5.4641e-08  
a 2.774959258333336 1.9436e-08 au
q 2.145333926484419 1.4809e-07 au
i 6.150906857090226 5.8228e-06 deg
node 279.1719846451163 5.6694e-05 deg
peri 65.99021473370779 5.8494e-05 deg
M 177.7234798839362 1.9438e-05 deg
tp 2458166.961524668716
(2018-Feb-17.46152467)
8.5688e-05 TDB
period 1688.431102717704
4.62
1.7739e-05
4.857e-08
d
yr
n .213215688469931 2.2401e-09 deg/d
Q 3.404584590182254 2.3846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      662  
   data-arc span      8964 days (24.54 yr)  
   first obs. used      1994-07-08  
   last obs. used      2019-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54673  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:25:20  

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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