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9858 (1991 OL1)
Classification: Outer Main-belt Asteroid          SPK-ID: 2009858
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1861449192938846 7.4984e-08  
a 3.217650407270491 3.9626e-08 AU
q 2.61870113189319 2.5378e-07 AU
i 2.780320113279397 6.2986e-06 deg
node 113.4163511728988 0.00014974 deg
peri 246.0847190122974 0.00015068 deg
M 310.6679197376401 2.0078e-05 deg
tp 2457089.390752989803
(2015-Mar-07.89075299)
0.00012072 JED
period 2108.175258842285
5.77
3.8944e-05
1.066e-07
d
yr
n .1707637913356861 3.1545e-09 deg/d
Q 3.816599682647791 4.7002e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      920  
   data-arc span      13651 days (37.37 yr)  
   first obs. used      1977-02-19  
   last obs. used      2014-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53825  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:22:43  

Additional Information
 Earth MOID = 1.61547 AU 
 T_jup = 3.161 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1 mag n/a MPO263437  

9858 (1991 OL1)          Discovered 1991-Jul-18 by Debehogne, H. at La Silla (809)
Reference: 19990106/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 OL1 = 1977 DH1 = 1986 TK13 = 1992 WJ4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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