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91915 (1999 VF31)
Classification: Outer Main-belt Asteroid          SPK-ID: 2091915
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1688937319895632 4.7466e-08  
a 3.220513678091826 2.5222e-08 au
q 2.676589104075462 1.6278e-07 au
i 9.313704633280262 5.1775e-06 deg
node 60.08062033475439 2.9757e-05 deg
peri 334.1846302993485 3.3253e-05 deg
M 293.6348274204656 1.6641e-05 deg
tp 2459785.656130330684
(2022-Jul-25.15613033)
9.9873e-05 TDB
period 2110.989868234728
5.78
2.4798e-05
6.789e-08
d
yr
n .1705361098208598 2.0033e-09 deg/d
Q 3.764438252108189 2.9481e-08 au
  Orbit Determination Parameters
   # obs. used (total)      589  
   data-arc span      10165 days (27.83 yr)  
   first obs. used      1993-10-10  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52772  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:02:58  

Additional Information
 Earth MOID = 1.68679 au 
 Jupiter MOID = 1.67178 au 
 T_jup = 3.146 
[ 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 14.73   n/a MPO637247  
diameter diameter 6.793 km 0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91915 (1999 VF31)          Discovered 1999-Nov-03 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 VF31 = 1993 UZ8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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