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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3122681507736149 9.1836e-08  
a 2.379531442418036 1.2111e-08 AU
q 1.636479559186483 2.179e-07 AU
i 2.395120224851028 8.3937e-06 deg
node 53.26297402851784 0.00020482 deg
peri 288.5474062285756 0.000205 deg
M 301.0424430346579 1.3766e-05 deg
tp 2457020.069785244081
(2014-Dec-28.56978524)
5.2412e-05 JED
period 1340.712315035976
3.67
1.0235e-05
2.802e-08
d
yr
n .2685139801899559 2.0499e-09 deg/d
Q 3.122583325649588 1.5892e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      317  
   data-arc span      10071 days (27.57 yr)  
   first obs. used      1985-09-11  
   last obs. used      2013-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56348  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Oct-22 23:02:50  

Additional Information
 Earth MOID = .629168 AU 
 T_jup = 3.470 
[ 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 (809)
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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