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91917 (1999 VT31)
Classification: Main-belt Asteroid          SPK-ID: 2091917
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1468971148027768 4.4742e-08  
a 3.035383957287762 2.388e-08 au
q 2.589494811643555 1.3839e-07 au
i 1.771134292289191 5.503e-06 deg
node 247.3380923135344 0.00019293 deg
peri 158.7243421185324 0.00019458 deg
M 322.6451890481321 2.3271e-05 deg
tp 2459200.930089599157
(2020-Dec-17.43008960)
0.00012538 TDB
period 1931.607480189603
5.29
2.2795e-05
6.241e-08
d
yr
n .1863732687371158 2.1994e-09 deg/d
Q 3.48127310293197 2.7388e-08 au
  Orbit Determination Parameters
   # obs. used (total)      429  
   data-arc span      7820 days (21.41 yr)  
   first obs. used      1998-06-20  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60261  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 08:17:50  

Additional Information
 Earth MOID = 1.59915 au 
 Jupiter MOID = 1.90489 au 
 T_jup = 3.224 
[ 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 15.5   n/a MPO449565  

91917 (1999 VT31)          Discovered 1999-Nov-03 by LINEAR at Socorro
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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