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91991 (1999 VH116)
Classification: Main-belt Asteroid          SPK-ID: 2091991
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03994113592403765 5.3173e-08  
a 3.098266281367229 3.5243e-08 au
q 2.974518006694278 1.6908e-07 au
i 5.206719861889368 5.9293e-06 deg
node 208.5995219618631 6.8376e-05 deg
peri 229.1352751495359 0.00010477 deg
M 254.2917850244315 7.9555e-05 deg
tp 2459585.401555358187
(2022-Jan-05.90155536)
0.00044076 TDB
period 1991.941307282631
5.45
3.3987e-05
9.305e-08
d
yr
n .1807282165813937 3.0837e-09 deg/d
Q 3.22201455604018 3.665e-08 au
  Orbit Determination Parameters
   # obs. used (total)      446  
   data-arc span      7515 days (20.57 yr)  
   first obs. used      1999-11-04  
   last obs. used      2020-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53142  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:42:47  

Additional Information
 Earth MOID = 1.99268 au 
 Jupiter MOID = 1.90825 au 
 T_jup = 3.215 
[ 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 MPO432457  

91991 (1999 VH116)          Discovered 1999-Nov-04 by Spacewatch at Kitt Peak
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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