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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1860327637295913 7.1702e-08  
a 3.217347087657438 3.4938e-08 AU
q 2.618815117063173 2.4769e-07 AU
i 2.780339247623935 6.2945e-06 deg
node 113.4166026254256 0.00011989 deg
peri 246.0749744357455 0.0001209 deg
M 344.8224355399331 1.6868e-05 deg
tp 2457089.367893287590
(2015-Mar-07.86789329)
9.943e-05 JED
period 2107.877167493286
5.77
3.4335e-05
9.4e-08
d
yr
n .1707879403751579 2.7819e-09 deg/d
Q 3.815879058251703 4.1437e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      966  
   data-arc span      13703 days (37.52 yr)  
   first obs. used      1977-02-19  
   last obs. used      2014-08-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53871  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:55:45  

Additional Information
 Earth MOID = 1.61711 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 13.2 mag n/a MPO302126  

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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