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78540 (2002 RH117)
Classification: Main-belt Asteroid          SPK-ID: 2078540
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1427802996418201 3.8663e-08  
a 3.197807685163362 2.5615e-08 au
q 2.741223745678822 1.1866e-07 au
i 1.34968373304933 5.1725e-06 deg
node 33.87253683010742 0.00019043 deg
peri 236.1529113328341 0.00019138 deg
M 133.8468149362534 1.9596e-05 deg
tp 2458423.926654664159
(2018-Nov-01.42665466)
0.00011132 TDB
period 2088.704198557512
5.72
2.5096e-05
6.871e-08
d
yr
n .172355664458673 2.0709e-09 deg/d
Q 3.654391624647902 2.9272e-08 au
  Orbit Determination Parameters
   # obs. used (total)      451  
   data-arc span      10658 days (29.18 yr)  
   first obs. used      1991-10-10  
   last obs. used      2020-12-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55459  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:37:18  

Additional Information
 Earth MOID = 1.72359 au 
 Jupiter MOID = 1.4463 au 
 T_jup = 3.179 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.44   n/a MPCxxxxx  

78540 (2002 RH117)          Discovered 2002-Sep-07 by Kusnirak, P., Pravec, P. at Ondrejov
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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