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91538 (1999 RA204)
Classification: Main-belt Asteroid          SPK-ID: 2091538
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2311493853614774 6.5774e-08  
a 2.64777498158265 1.4764e-08 au
q 2.035743422014323 1.7288e-07 au
i 28.05806932646428 1.0935e-05 deg
node 347.1841629617795 1.0324e-05 deg
peri 111.8918711022109 2.5174e-05 deg
M 221.3017876886762 2.1289e-05 deg
tp 2459606.801162547191
(2022-Jan-27.30116255)
9.4226e-05 TDB
period 1573.693091494653
4.31
1.3162e-05
3.604e-08
d
yr
n .2287612508091278 1.9133e-09 deg/d
Q 3.259806541150977 1.8176e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1027  
   data-arc span      7630 days (20.89 yr)  
   first obs. used      1999-09-08  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43668  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:17:56  

Additional Information
 Earth MOID = 1.1804 au 
 Jupiter MOID = 2.12645 au 
 T_jup = 3.190 
[ 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 13.9   n/a MPO449562  
diameter diameter 9.997 km 0.093 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.063   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91538 (1999 RA204)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1999 RA204 = 2001 BS60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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