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9958 (1991 VL1)
Classification: Main-belt Asteroid          SPK-ID: 2009958
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1261054000478797 2.956e-08  
a 2.175101119628013 7.5063e-09 au
q 1.900809122792732 6.6369e-08 au
i 5.966781744154504 4.2009e-06 deg
node 102.5674129818553 3.0081e-05 deg
peri 256.6229394664742 3.5689e-05 deg
M 356.9280041956411 2.2091e-05 deg
tp 2459010.498520059290
(2020-Jun-09.99852006)
7.1921e-05 TDB
period 1171.703169723351
3.21
6.0653e-06
1.661e-08
d
yr
n .3072450508817851 1.5905e-09 deg/d
Q 2.449393116463295 8.4529e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1835  
   data-arc span      10497 days (28.74 yr)  
   first obs. used      1991-11-04  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49829  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:13:48  

Additional Information
 Earth MOID = .907334 au 
 Jupiter MOID = 2.97722 au 
 T_jup = 3.668 
[ 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 14.3   n/a MPO337342  
diameter diameter 3.819 km 0.116 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.277   0.055 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9958 (1991 VL1)          Discovered 1991-Nov-04 by Ueda, S., Kaneda, H. at Kushiro
Reference: 19990202/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 VL1 = 1996 FN5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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