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JPL Small-Body Database Browser
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91489 (1999 RL121)
Classification: Main-belt Asteroid          SPK-ID: 2091489
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1020004563054235 5.0058e-08  
a 3.017587776195504 2.9738e-08 au
q 2.709792446081895 1.649e-07 au
i 9.048123242933261 7.593e-06 deg
node 206.5049902444896 2.8851e-05 deg
peri 119.0476108547838 5.248e-05 deg
M 358.3366434606377 4.0118e-05 deg
tp 2459009.346493112615
(2020-Jun-08.84649311)
0.00021335 TDB
period 1914.645143826228
5.24
2.8303e-05
7.749e-08
d
yr
n .188024397711931 2.7795e-09 deg/d
Q 3.325383106309114 3.2772e-08 au
  Orbit Determination Parameters
   # obs. used (total)      364  
   data-arc span      7709 days (21.11 yr)  
   first obs. used      1998-06-19  
   last obs. used      2019-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61633  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:31:53  

Additional Information
 Earth MOID = 1.71338 au 
 Jupiter MOID = 2.03016 au 
 T_jup = 3.221 
[ 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 15.4   n/a MPO474793  

91489 (1999 RL121)          Discovered 1999-Sep-09 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 RL121 = 2003 KY35 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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