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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1261053902268014 3.1756e-08  
a 2.175101114607031 8.433e-09 au
q 1.90080913976676 7.157e-08 au
i 5.966780303192372 4.6283e-06 deg
node 102.5674250174431 3.1069e-05 deg
peri 256.6228815889116 3.7951e-05 deg
M 356.9280498523088 2.5432e-05 deg
tp 2459010.498371424496
(2020-Jun-09.99837142)
8.2802e-05 TDB
period 1171.703165666229
3.21
6.8141e-06
1.866e-08
d
yr
n .3072450519456474 1.7868e-09 deg/d
Q 2.449393089447301 9.4964e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1690  
   data-arc span      10050 days (27.52 yr)  
   first obs. used      1991-11-04  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49438  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:45:59  

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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