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78237 (2002 OL20)
Classification: Main-belt Asteroid          SPK-ID: 2078237
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04515301955962724 5.9681e-08  
a 2.996960252230271 2.5083e-08 au
q 2.861638447341893 1.8087e-07 au
i 11.10451834959482 5.1746e-06 deg
node 256.6911094667697 3.3954e-05 deg
peri 72.29360323205968 6.9983e-05 deg
M 135.3731107063298 6.1363e-05 deg
tp 2458287.893451010248
(2018-Jun-18.39345101)
0.00032278 TDB
period 1895.046632952312
5.19
2.3791e-05
6.514e-08
d
yr
n .1899689399406243 2.3849e-09 deg/d
Q 3.13228205711865 2.6215e-08 au
  Orbit Determination Parameters
   # obs. used (total)      403  
   data-arc span      7730 days (21.16 yr)  
   first obs. used      1999-02-10  
   last obs. used      2020-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54518  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:27:38  

Additional Information
 Earth MOID = 1.87255 au 
 Jupiter MOID = 2.04789 au 
 T_jup = 3.224 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO459356  
rotation period rot_per 223.743 h n/a LCDB (Rev. 2019-August); 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.]

78237 (2002 OL20)          Discovered 2002-Jul-28 by NEAT at Palomar
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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