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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2004765252519152 3.9347e-08  
a 2.376471060013415 8.5006e-09 au
q 1.90004439954019 9.4181e-08 au
i 1.73085130194225 4.2841e-06 deg
node 315.9359051326888 0.00016548 deg
peri 17.5865807666891 0.00016589 deg
M 47.02437465396135 1.3112e-05 deg
tp 2459221.709530106548
(2021-Jan-07.20953011)
4.8294e-05 TDB
period 1338.126655052536
3.66
7.1797e-06
1.966e-08
d
yr
n .2690328293220242 1.4435e-09 deg/d
Q 2.85289772048664 1.0205e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57051  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:31:57  

Additional Information
 Earth MOID = .889161 au 
 Jupiter MOID = 2.51452 au 
 T_jup = 3.513 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456862.5 (2014-Jul-24.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1998584222678234 3.91e-08  
q 1.901962285887654 9.3472e-08 au
tp 2456542.776824879302
(2013-Sep-07.27682488)
4.3822e-05 TDB
node 316.0296576879316 0.00016506 deg
peri 17.21059895980644 0.00016547 deg
i 1.734263026436212 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57051  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:31:57  

Additional Information
 Jupiter MOID = 2.51452 au 
 T_jup = 3.513 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.528776541516514E-15 -3.644967671657698E-15 4.49940222568666E-13 6.358495752218653E-15 1.180296076991269E-13 -2.887008868958265E-16
q -3.644967671657698E-15 8.736939775893343E-15 -1.006457484422068E-12 -1.55128722782517E-14 -2.619602020503961E-13 7.107900380249351E-16
tp 4.49940222568666E-13 -1.006457484422068E-12 1.920389751331901E-9 -8.866805797521433E-12 5.424837207357251E-10 -6.771428861816497E-13
node 6.358495752218653E-15 -1.55128722782517E-14 -8.866805797521433E-12 2.72437236361735E-8 -2.723352841753823E-8 1.800464154540167E-10
peri 1.180296076991269E-13 -2.619602020503961E-13 5.424837207357251E-10 -2.723352841753823E-8 2.738188112157758E-8 -1.801410416809829E-10
i -2.887008868958265E-16 7.107900380249351E-16 -6.771428861816497E-13 1.800464154540167E-10 -1.801410416809829E-10 1.833729570429327E-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 16.56   n/a E2021B55  
rotation period rot_per 4.59 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:
[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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