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91957 (1999 VO78)
Classification: Main-belt Asteroid          SPK-ID: 2091957
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1081084006650243 5.2101e-08  
a 3.172343707199626 2.5886e-08 au
q 2.82938670265452 1.6577e-07 au
i 4.494389591010903 6.3242e-06 deg
node 335.4621127503158 6.9451e-05 deg
peri 165.4689427163299 7.5729e-05 deg
M 142.3447691504002 2.896e-05 deg
tp 2458184.466870492512
(2018-Mar-06.96687049)
0.00016608 TDB
period 2063.805564307733
5.65
2.5261e-05
6.916e-08
d
yr
n .1744350370141363 2.1351e-09 deg/d
Q 3.515300711744732 2.8685e-08 au
  Orbit Determination Parameters
   # obs. used (total)      676  
   data-arc span      7164 days (19.61 yr)  
   first obs. used      1999-10-21  
   last obs. used      2019-06-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55935  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:40:26  

Additional Information
 Earth MOID = 1.84253 au 
 Jupiter MOID = 1.50173 au 
 T_jup = 3.188 
[ 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 14.7   n/a MPO436415  
diameter diameter 6.861 km 0.302 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.065   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91957 (1999 VO78)          Discovered 1999-Nov-04 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 VO78 = 2001 BR8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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