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15781 (1993 OJ7)
Classification: Main-belt Asteroid          SPK-ID: 2015781
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09649533551883685 1.2973e-08  
a 2.30213036162619 6.7947e-09 au
q 2.07998551997297 2.946e-08 au
i 5.855910866403568 1.6972e-06 deg
node 297.5393693707554 1.1747e-05 deg
peri 118.0125214675782 1.9577e-05 deg
M 198.3377467254008 1.5616e-05 deg
tp 2459773.427175796099
(2022-Jul-12.92717580)
5.5809e-05 TDB
period 1275.831426995226
3.49
5.6484e-06
1.546e-08
d
yr
n .2821689389231098 1.2492e-09 deg/d
Q 2.524275203279411 7.4504e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1998  
   data-arc span      14962 days (40.96 yr)  
   first obs. used      1979-07-24  
   last obs. used      2020-07-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49163  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:08:56  

Additional Information
 Earth MOID = 1.09879 au 
 Jupiter MOID = 2.73687 au 
 T_jup = 3.577 
[ 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 14.24   n/a E2021B10  
rotation period rot_per 3.863 h n/a LCDB (Rev. 2020-October); 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:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]

15781 (1993 OJ7)          Discovered 1993-Jul-20 by Elst, E. W. at La Silla
Reference: 20000726/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1993 OJ7 = 1979 ON2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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