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91891 (1999 VJ2)
Classification: Main-belt Asteroid          SPK-ID: 2091891
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1221244354278576 6.1427e-08  
a 2.976419648758077 2.0459e-08 au
q 2.612926079557115 1.915e-07 au
i 8.781250289684031 5.4429e-06 deg
node 292.8262800331713 3.7285e-05 deg
peri 88.22082441475398 4.638e-05 deg
M 18.34249430551623 2.6081e-05 deg
tp 2458904.935726333039
(2020-Feb-25.43572633)
0.00013561 TDB
period 1875.597612139364
5.14
1.9339e-05
5.295e-08
d
yr
n .1919388240153351 1.979e-09 deg/d
Q 3.339913217959039 2.2958e-08 au
  Orbit Determination Parameters
   # obs. used (total)      972  
   data-arc span      8044 days (22.02 yr)  
   first obs. used      1998-07-21  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53593  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 08:20:42  

Additional Information
 Earth MOID = 1.63425 au 
 Jupiter MOID = 2.19302 au 
 T_jup = 3.232 
[ show covariance matrix ]

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 14.3   n/a MPO502692  
rotation period rot_per 60.665 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.]

91891 (1999 VJ2)          Discovered 1999-Nov-05 by Kobayashi, T. at Oizumi
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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