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19958 (1985 RN4)
Classification: Mars-crossing Asteroid          SPK-ID: 2019958
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3105818582137113 3.5639e-08  
a 2.380517103551296 6.936e-09 au
q 1.641171678020813 8.4943e-08 au
i 2.394478483256636 3.4716e-06 deg
node 53.21915074878879 9.6078e-05 deg
peri 288.80675714 9.62e-05 deg
M 171.0704746220687 4.8186e-06 deg
tp 2458363.003293204867
(2018-Sep-01.50329321)
1.7289e-05 TDB
period 1341.545435898626
3.67
5.8632e-06
1.605e-08
d
yr
n .2683472287756369 1.1728e-09 deg/d
Q 3.119862529081779 9.0902e-09 au
  Orbit Determination Parameters
   # obs. used (total)      829  
   data-arc span      12611 days (34.53 yr)  
   first obs. used      1985-09-11  
   last obs. used      2020-03-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50823  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:05:38  

Additional Information
 Earth MOID = .635179 au 
 Jupiter MOID = 2.29547 au 
 T_jup = 3.471 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1   n/a MPO452452  

19958 (1985 RN4)          Discovered 1985-Sep-11 by Debehogne, H. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1985 RN4 = 1996 TO38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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