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91539 (1999 RP204)
Classification: Main-belt Asteroid          SPK-ID: 2091539
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1226685048935609 3.9536e-08  
a 2.966027601807234 1.9e-08 au
q 2.602189430420507 1.1406e-07 au
i 9.55190598139111 4.1713e-06 deg
node 255.0537524053151 2.6273e-05 deg
peri 93.29979142813386 3.1685e-05 deg
M 109.6773904096383 1.7233e-05 deg
tp 2458828.071535980946
(2019-Dec-10.57153598)
8.8913e-05 TDB
period 1865.783333124202
5.11
1.7928e-05
4.908e-08
d
yr
n .1929484488411578 1.854e-09 deg/d
Q 3.329865773193962 2.133e-08 au
  Orbit Determination Parameters
   # obs. used (total)      988  
   data-arc span      7827 days (21.43 yr)  
   first obs. used      1999-09-08  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46882  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:46:23  

Additional Information
 Earth MOID = 1.61743 au 
 Jupiter MOID = 2.13416 au 
 T_jup = 3.232 
[ 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 14.52   n/a E2021B10  

91539 (1999 RP204)          Discovered 1999-Sep-08 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RP204 = 2001 AN3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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