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101961 (1999 RL39)
Classification: Mars-crossing Asteroid          SPK-ID: 2101961
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2423192995688786 5.2793e-08  
a 2.182492125024125 7.9911e-09 au
q 1.653632161973686 1.1401e-07 au
i 7.633152973064279 4.4554e-06 deg
node 87.97328608785097 3.8227e-05 deg
peri 252.1409089955013 3.9288e-05 deg
M 176.3318667611766 1.3049e-05 deg
tp 2458423.659480416356
(2018-Nov-01.15948042)
4.0612e-05 TDB
period 1177.680420813382
3.22
6.4681e-06
1.771e-08
d
yr
n .3056856458149833 1.6789e-09 deg/d
Q 2.711352088074564 9.9275e-09 au
  Orbit Determination Parameters
   # obs. used (total)      679  
   data-arc span      7582 days (20.76 yr)  
   first obs. used      1999-09-08  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57708  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:30  

Additional Information
 Earth MOID = .664473 au 
 Jupiter MOID = 2.71061 au 
 T_jup = 3.630 
[ 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 15.9   n/a MPO348133  

101961 (1999 RL39)          Discovered 1999-Sep-08 by CSS at Catalina
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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