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100391 (1995 WO17)
Classification: Main-belt Asteroid          SPK-ID: 2100391
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2008095195483046 3.9297e-08  
a 2.376969912073037 8.4113e-09 au
q 1.899651726048874 9.4198e-08 au
i 1.730834657308107 4.2829e-06 deg
node 315.9406021916064 0.0001655 deg
peri 17.69335619285814 0.00016591 deg
M 300.4348850617437 1.2841e-05 deg
tp 2459221.974350570673
(2021-Jan-07.47435057)
4.8269e-05 TDB
period 1338.548012340597
3.66
7.105e-06
1.945e-08
d
yr
n .2689481413300228 1.4276e-09 deg/d
Q 2.854288098097199 1.01e-08 au
  Orbit Determination Parameters
   # obs. used (total)      439  
   data-arc span      9063 days (24.81 yr)  
   first obs. used      1995-10-24  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57072  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:06:27  

Additional Information
 Earth MOID = .889562 au 
 Jupiter MOID = 2.51396 au 
 T_jup = 3.513 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456862.5 (2014-Jul-24.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1998584220219547 3.91e-08  
q 1.90196228691144 9.3472e-08 au
tp 2456542.776824541803
(2013-Sep-07.27682454)
4.3822e-05 TDB
node 316.0296570523688 0.00016506 deg
peri 17.2105996648003 0.00016547 deg
i 1.734263010315079 4.2822e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      439  
   data-arc span      9063 days (24.81 yr)  
   first obs. used      1995-10-24  
   last obs. used      2020-08-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57072  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:06:27  

Additional Information
 Jupiter MOID = 2.51396 au 
 T_jup = 3.513 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.528776558105974E-15 -3.644967800757938E-15 4.499406017534994E-13 6.35853195696585E-15 1.180296441442428E-13 -2.887016503234562E-16
q -3.644967800757938E-15 8.736940515622527E-15 -1.00645895455048E-12 -1.551315946930592E-14 -2.619601479053247E-13 7.107960791177373E-16
tp 4.499406017534994E-13 -1.00645895455048E-12 1.920390492085624E-9 -8.866605608325719E-12 5.424835304865768E-10 -6.771485211651261E-13
node 6.35853195696585E-15 -1.551315946930592E-14 -8.866605608325719E-12 2.724372503429363E-8 -2.723352981194128E-8 1.800464333679681E-10
peri 1.180296441442428E-13 -2.619601479053247E-13 5.424835304865768E-10 -2.723352981194128E-8 2.738188250348335E-8 -1.801410599627842E-10
i -2.887016503234562E-16 7.107960791177373E-16 -6.771485211651261E-13 1.800464333679681E-10 -1.801410599627842E-10 1.833729538937823E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.5   n/a MPO432532  
rotation period rot_per 4.59 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:
[Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.]

100391 (1995 WO17)          Discovered 1995-Nov-17 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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