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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3116652324779733 4.9848e-08  
a 2.380321658064875 1.7889e-08 au
q 1.638458155131731 1.2201e-07 au
i 2.394922287356128 6.4789e-06 deg
node 53.24602571629151 0.00014364 deg
peri 288.6081111387932 0.00014415 deg
M 155.8169811892395 1.612e-05 deg
tp 2457019.917174760289
(2014-Dec-28.41717476)
5.4755e-05 JED
period 1341.380223715501
3.67
1.5121e-05
4.14e-08
d
yr
n .2683802799797008 3.0254e-09 deg/d
Q 3.122185160998019 2.3464e-08 au
  Orbit Determination Parameters
   # obs. used (total)      392  
   data-arc span      11108 days (30.41 yr)  
   first obs. used      1985-09-11  
   last obs. used      2016-02-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53731  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 19:26:38  

Additional Information
 Earth MOID = .631585 au 
 Jupiter MOID = 2.28213 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 16.1 mag n/a MPO365491  

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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