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181902 (1999 RD215)
Classification: TransNeptunian Object          SPK-ID: 2181902
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6956821211887577 0.00032687  
a 123.2551617399688 0.14244 au
q 37.50874937324389 0.003194 au
i 25.94034628094936 0.00023882 deg
node 210.2973040880422 0.00013984 deg
peri 137.8991841280248 0.0094546 deg
M 8.282548030714274 0.015462 deg
tp 2447501.301707115068
(1988-Dec-05.80170712)
1.6272 TDB
period 499811.3346384751
1368.41
866.41
2.372
d
yr
n .0007202717806717932 1.2486e-06 deg/d
Q 209.0015741066937 0.24153 au
  Orbit Determination Parameters
   # obs. used (total)      25  
   data-arc span      6642 days (18.18 yr)  
   first obs. used      1999-09-06  
   last obs. used      2017-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .16912  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 08:51:24  

Additional Information
 Earth MOID = 36.5485 au 
 Jupiter MOID = 32.8165 au 
 T_jup = 6.330 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.4   n/a MPO136118  

181902 (1999 RD215)          Discovered 1999-Sep-06 by Trujillo, C. A., Luu, J. X., Jewitt, D. C. at Mauna Kea
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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