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91914 (1999 VD31)
Classification: Main-belt Asteroid          SPK-ID: 2091914
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1956303324063823 4.7181e-08  
a 3.151763115365657 2.5315e-08 au
q 2.535182649440499 1.5572e-07 au
i .9058221018400321 4.6175e-06 deg
node 80.109168739514 0.00032863 deg
peri 320.9042769667478 0.00032892 deg
M 264.655755668386 1.7039e-05 deg
tp 2459541.778479176954
(2021-Nov-23.27847918)
0.00010183 TDB
period 2043.754752787862
5.60
2.4624e-05
6.742e-08
d
yr
n .1761463793583492 2.1222e-09 deg/d
Q 3.768343581290815 3.0268e-08 au
  Orbit Determination Parameters
   # obs. used (total)      663  
   data-arc span      9418 days (25.79 yr)  
   first obs. used      1993-09-15  
   last obs. used      2019-06-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54913  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:44:03  

Additional Information
 Earth MOID = 1.5436 au 
 Jupiter MOID = 1.64838 au 
 T_jup = 3.177 
[ 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 15.0   n/a MPO432456  
diameter diameter 4.995 km 0.776 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.071   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

91914 (1999 VD31)          Discovered 1999-Nov-03 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 VD31 = 1998 MD49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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