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154877 (2004 RA118)
Classification: Main-belt Asteroid          SPK-ID: 2154877
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09213065004505322 4.9409e-08  
a 2.770930131571772 2.5587e-08 au
q 2.51564253732064 1.4089e-07 au
i 13.10442218099043 7.1337e-06 deg
node 19.00395358711341 2.0419e-05 deg
peri 227.5912353287197 4.2799e-05 deg
M 286.2276276477102 4.1372e-05 deg
tp 2459545.745509554838
(2021-Nov-27.24550955)
0.00019596 TDB
period 1684.755139040662
4.61
2.3336e-05
6.389e-08
d
yr
n .2136809033299595 2.9598e-09 deg/d
Q 3.026217725822903 2.7945e-08 au
  Orbit Determination Parameters
   # obs. used (total)      417  
   data-arc span      9230 days (25.27 yr)  
   first obs. used      1995-10-18  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65809  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 10:48:55  

Additional Information
 Earth MOID = 1.52227 au 
 Jupiter MOID = 2.01179 au 
 T_jup = 3.293 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456838.5 (2014-Jun-30.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09404873629048391 4.8998e-08  
q 2.508982054184365 1.3978e-07 au
tp 2456177.403452248898
(2012-Sep-06.90345225)
0.00017424 TDB
node 19.06219817609795 2.0438e-05 deg
peri 227.6807276399852 4.2295e-05 deg
i 13.10233323747942 7.132e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      417  
   data-arc span      9230 days (25.27 yr)  
   first obs. used      1995-10-18  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65809  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 10:48:55  

Additional Information
 Jupiter MOID = 2.01179 au 
 T_jup = 3.293 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.400821736726487E-15 -6.757068959871584E-15 -3.687441328128231E-12 -8.310249320472779E-15 -7.404878490037916E-13 2.10304670540386E-15
q -6.757068959871584E-15 1.953937999559745E-14 1.136949751128375E-11 2.302943540467011E-14 2.328917757309618E-12 -3.44930206091429E-15
tp -3.687441328128231E-12 1.136949751128375E-11 3.036121198981111E-8 1.522319883102915E-11 6.462678642026248E-9 8.609241509948682E-12
node -8.310249320472779E-15 2.302943540467011E-14 1.522319883102915E-11 4.177319783928895E-10 -4.032304418437063E-10 -2.794788467752035E-11
peri -7.404878490037916E-13 2.328917757309618E-12 6.462678642026248E-9 -4.032304418437063E-10 1.788843217183139E-9 2.91899960918217E-11
i 2.10304670540386E-15 -3.44930206091429E-15 8.609241509948682E-12 -2.794788467752035E-11 2.91899960918217E-11 5.086589712287147E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.4   n/a MPO366898  

154877 (2004 RA118)          Discovered 2004-Sep-07 by LINEAR at Socorro
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

Alternate Designations
 2004 RA118 = 1998 HJ21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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