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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 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6956348186426468 0.00033928  
a 123.2427145340463 0.14745 au
q 37.5107911601275 0.0062337 au
i 25.94067274027835 0.00057867 deg
node 210.2970686942212 0.00036588 deg
peri 137.911775799128 0.031082 deg
M 8.282385207216494 0.016494 deg
tp 2447503.269596781380
(1988-Dec-07.76959678)
5.0203 TDB
period 499735.6246546422
1368.20
896.86
2.455
d
yr
n .0007203809018994576 1.2928e-06 deg/d
Q 208.974637907965 0.25003 au
  Orbit Determination Parameters
   # obs. used (total)      23  
   data-arc span      2933 days (8.03 yr)  
   first obs. used      1999-09-06  
   last obs. used      2007-09-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .14704  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 06:36:38  

Additional Information
 Earth MOID = 36.5505 au 
 Jupiter MOID = 32.8185 au 
 T_jup = 6.330 
[ hide covariance matrix ]
Orbital Elements at Epoch 2452613.5 (2002-Dec-05.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6917661966640591 0.00033939  
q 37.62780133774254 0.0061883 au
tp 2447567.531310881754
(1989-Feb-10.03131088)
5.1029 TDB
node 210.3120099398156 0.00036583 deg
peri 138.3996573479895 0.031273 deg
i 25.92428462004585 0.0005789 deg
  Orbit Determination Parameters
   # obs. used (total)      23  
   data-arc span      2933 days (8.03 yr)  
   first obs. used      1999-09-06  
   last obs. used      2007-09-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .14704  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 06:36:38  

Additional Information
 Jupiter MOID = 32.8185 au 
 T_jup = 6.330 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.151828022169995E-7 9.328040015262332E-7 .0004081976924101903 2.461626229730611E-8 2.202602753998891E-6 -4.516471023105513E-8
q 9.328040015262332E-7 3.829468743955557E-5 .03076142946032184 2.309124182249325E-7 .0001872777687489702 -5.701828571306832E-7
tp .0004081976924101903 .03076142946032184 26.03921923268882 .0001137813848761515 .1594992633647057 -.0003397989320364823
node 2.461626229730611E-8 2.309124182249325E-7 .0001137813848761515 1.338345769872224E-7 5.207699625323079E-7 -1.953404701802844E-7
peri 2.202602753998891E-6 .0001872777687489702 .1594992633647057 5.207699625323079E-7 .0009779956459100628 -1.809268841744205E-6
i -4.516471023105513E-8 -5.701828571306832E-7 -.0003397989320364823 -1.953404701802844E-7 -1.809268841744205E-6 3.351272848283672E-7

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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