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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1020004536446193 4.8636e-08  
a 3.017587781197777 2.4498e-08 au
q 2.709792458603144 1.5689e-07 au
i 9.048125892899549 5.7258e-06 deg
node 206.5049981012309 2.4457e-05 deg
peri 119.047608115217 4.8648e-05 deg
M 358.336637556891 3.6326e-05 deg
tp 2459009.346524533446
(2020-Jun-08.84652453)
0.00019315 TDB
period 1914.645148587105
5.24
2.3316e-05
6.384e-08
d
yr
n .1880243972443973 2.2897e-09 deg/d
Q 3.32538310379241 2.6997e-08 au
  Orbit Determination Parameters
   # obs. used (total)      504  
   data-arc span      8156 days (22.33 yr)  
   first obs. used      1998-06-19  
   last obs. used      2020-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56762  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:39:42  

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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