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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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09213064465139661 4.9063e-08  
a 2.770930116383231 1.8574e-08 au
q 2.515642538476874 1.4088e-07 au
i 13.104422073711 7.1047e-06 deg
node 19.00395343881657 1.8204e-05 deg
peri 227.5912250354968 3.9706e-05 deg
M 286.2276432518788 3.6675e-05 deg
tp 2459545.745433690637
(2021-Nov-27.24543369)
0.00017254 TDB
period 1684.755125188469
4.61
1.6939e-05
4.638e-08
d
yr
n .2136809050868611 2.1485e-09 deg/d
Q 3.026217694289587 2.0285e-08 au
  Orbit Determination Parameters
   # obs. used (total)      565  
   data-arc span      9316 days (25.51 yr)  
   first obs. used      1995-10-18  
   last obs. used      2021-04-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61001  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 09:44:06  

Additional Information
 Earth MOID = 1.52227 au 
 Jupiter MOID = 2.01179 au 
 T_jup = 3.293 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457220.5 (2015-Jul-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0939223155542281 4.8762e-08  
q 2.509658825206736 1.4029e-07 au
tp 2457860.036927962044
(2017-Apr-16.53692796)
0.00016572 TDB
node 19.05649446395785 1.822e-05 deg
peri 227.5197698063772 3.9198e-05 deg
i 13.10202296859673 7.1032e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      565  
   data-arc span      9316 days (25.51 yr)  
   first obs. used      1995-10-18  
   last obs. used      2021-04-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61001  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 09:44:06  

Additional Information
 Jupiter MOID = 2.01179 au 
 T_jup = 3.293 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.377770300098847E-15 -6.794691133742195E-15 -4.283025964272214E-12 -9.833516569912311E-15 -8.221934927273523E-13 1.584389454063491E-15
q -6.794691133742195E-15 1.96801510220648E-14 1.239972703636893E-11 2.886876384451108E-14 2.361431290258985E-12 -3.799254403390591E-15
tp -4.283025964272214E-12 1.239972703636893E-11 2.746167378668975E-8 2.651047060760744E-11 5.752103845198005E-9 5.900232372479842E-12
node -9.833516569912311E-15 2.886876384451108E-14 2.651047060760744E-11 3.319777410170989E-10 -3.17665991788926E-10 -3.295462148588945E-11
peri -8.221934927273523E-13 2.361431290258985E-12 5.752103845198005E-9 -3.17665991788926E-10 1.536515731126615E-9 3.329041081342333E-11
i 1.584389454063491E-15 -3.799254403390591E-15 5.900232372479842E-12 -3.295462148588945E-11 3.329041081342333E-11 5.04554118992928E-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 15.39   n/a MPCxxxxx  

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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