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19958 (1985 RN4)
Classification: Mars-crossing Asteroid          SPK-ID: 2019958
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3120451642095464 5.3438e-08  
a 2.379464336453597 1.8309e-08 au
q 1.636963996854175 1.3129e-07 au
i 2.394988271606743 7.2338e-06 deg
node 53.25667423348866 0.00014571 deg
peri 288.5523024127758 0.00014626 deg
M 102.1678605499882 1.5611e-05 deg
tp 2457020.022459862154
(2014-Dec-28.52245986)
5.4754e-05 JED
period 1340.655600619214
3.67
1.5473e-05
4.236e-08
d
yr
n .2685253392696271 3.0992e-09 deg/d
Q 3.121964676053018 2.4022e-08 au
  Orbit Determination Parameters
   # obs. used (total)      359  
   data-arc span      11056 days (30.27 yr)  
   first obs. used      1985-09-11  
   last obs. used      2015-12-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53463  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:43:59  

Additional Information
 Earth MOID = .628943 au 
 Jupiter MOID = 2.28177 au 
 T_jup = 3.471 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0 mag n/a MPO259485  

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 | Physical Parameters | Discovery Circumstances ]
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