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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1225213720658196 5.4562e-08  
a 2.964646308313549 2.1565e-08 au
q 2.601413774929107 1.6575e-07 au
i 9.554043571556592 4.2196e-06 deg
node 255.0543107426157 3.5787e-05 deg
peri 93.10246512545955 3.9776e-05 deg
M 33.44813138854279 1.7688e-05 deg
tp 2458827.268399158343
(2019-Dec-09.76839916)
9.1318e-05 TDB
period 1864.480128308703
5.10
2.0343e-05
5.57e-08
d
yr
n .1930833128946036 2.1067e-09 deg/d
Q 3.327878841697992 2.4207e-08 au
  Orbit Determination Parameters
   # obs. used (total)      808  
   data-arc span      7379 days (20.20 yr)  
   first obs. used      1999-09-08  
   last obs. used      2019-11-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48712  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 08:17:05  

Additional Information
 Earth MOID = 1.61741 au 
 Jupiter MOID = 2.13581 au 
 T_jup = 3.233 
[ 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 14.5   n/a MPO493512  

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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