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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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3122680721358129 5.521e-08  
a 2.3795314061958 1.8574e-08 AU
q 1.636479721396418 1.3562e-07 AU
i 2.395120839615256 7.5082e-06 deg
node 53.26321671088068 0.00014822 deg
peri 288.5471451021289 0.00014875 deg
M 301.0424723145866 1.4312e-05 deg
tp 2457020.069671186171
(2014-Dec-28.56967119)
5.5179e-05 JED
period 1340.71228442264
3.67
1.5698e-05
4.298e-08
d
yr
n .2685139863211063 3.144e-09 deg/d
Q 3.122583090995183 2.4374e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      335  
   data-arc span      10520 days (28.80 yr)  
   first obs. used      1985-09-11  
   last obs. used      2014-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53078  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:43:55  

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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