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30881 Robertstevenson (1992 RS4)
Classification: Main-belt Asteroid          SPK-ID: 2030881
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1791670063606488 2.6959e-08  
a 2.583160056041815 1.1028e-08 au
q 2.120343001850397 6.9895e-08 au
i 1.631810763764223 4.8652e-06 deg
node 326.3057908837037 0.00014535 deg
peri 317.6808924296515 0.00014643 deg
M 24.67289609719318 1.6295e-05 deg
tp 2459292.569496647769
(2021-Mar-19.06949665)
6.8728e-05 TDB
period 1516.440593735545
4.15
9.7111e-06
2.659e-08
d
yr
n .2373980236925662 1.5203e-09 deg/d
Q 3.045977110233233 1.3004e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1096  
   data-arc span      10565 days (28.93 yr)  
   first obs. used      1992-09-02  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53801  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 23:44:40  

Additional Information
 Earth MOID = 1.10397 au 
 Jupiter MOID = 2.10787 au 
 T_jup = 3.400 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457202.5 (2015-Jun-29.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1787718980362912 2.7002e-08  
q 2.121954232462081 6.9765e-08 au
tp 2457774.770981535875
(2017-Jan-21.27098154)
7.0592e-05 TDB
node 326.3787546751215 0.00014502 deg
peri 317.1970252479715 0.0001461 deg
i 1.634401077182586 4.8632e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1096  
   data-arc span      10565 days (28.93 yr)  
   first obs. used      1992-09-02  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53801  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 23:44:40  

Additional Information
 Jupiter MOID = 2.10787 au 
 T_jup = 3.400 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.290923241317979E-16 -1.868273655564348E-15 3.74100414110633E-13 -3.233194712811286E-15 1.106334072555403E-13 2.729467098914549E-17
q -1.868273655564348E-15 4.867203275030671E-15 -1.099747208183197E-12 8.412579799199259E-15 -3.238617521417983E-13 -5.150760648173201E-17
tp 3.74100414110633E-13 -1.099747208183197E-12 4.983274347805891E-9 -2.621682635840704E-11 1.269000942079106E-9 5.52217967420613E-13
node -3.233194712811286E-15 8.412579799199259E-15 -2.621682635840704E-11 2.103115439478057E-8 -2.102882847231652E-8 3.82485779936289E-10
peri 1.106334072555403E-13 -3.238617521417983E-13 1.269000942079106E-9 -2.102882847231652E-8 2.134436942319965E-8 -3.821979106169114E-10
i 2.729467098914549E-17 -5.150760648173201E-17 5.52217967420613E-13 3.82485779936289E-10 -3.821979106169114E-10 2.365027078252015E-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 15.43   n/a MPO636514  

30881 Robertstevenson           Discovered 1992 Sept. 2 by E. W. Elst at the European Southern Observatory.
Robert Louis Stevenson (1850-1894) was a Scottish novelist, poet, essayist and travel writer. His 1879 publication Travels with a Donkey in the Cévennes, recounted his 200 km trip on foot through the Cévennes mountains. The road he followed has been named Chemin de Stevenson in his honor.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2017-01-12Last Updated: 2017-02-16

Alternate Designations
 1992 RS4 = 1996 PX3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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