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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1857264960286462 4.5597e-08  
a 3.216032143900876 2.5471e-08 au
q 2.618729762698671 1.5036e-07 au
i 2.78032446122108 5.2429e-06 deg
node 113.4144825490143 0.00010558 deg
peri 246.0248801679022 0.00010674 deg
M 53.20800668008567 1.3821e-05 deg
tp 2457089.146690272130
(2015-Mar-07.64669027)
8.0395e-05 JED
period 2106.585051681414
5.77
2.5026e-05
6.852e-08
d
yr
n .1708926965529631 2.0302e-09 deg/d
Q 3.81333452510308 3.0201e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1159  
   data-arc span      14182 days (38.83 yr)  
   first obs. used      1977-02-19  
   last obs. used      2015-12-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55209  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:12:08  

Additional Information
 Earth MOID = 1.61496 au 
 Jupiter MOID = 1.63171 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  
rotation period rot_per 21.2075 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

9858 (1991 OL1)          Discovered 1991-Jul-18 by Debehogne, H. at La Silla
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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