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21940 (1999 VU91)
Classification: Main-belt Asteroid          SPK-ID: 2021940
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07410837904044681 3.748e-08  
a 2.603273360340709 1.1686e-08 au
q 2.410348991406682 9.4186e-08 au
i 14.36640011038853 3.747e-06 deg
node 161.0732206592646 1.8189e-05 deg
peri 157.9970659668423 3.5883e-05 deg
M 132.5025231611999 3.0997e-05 deg
tp 2458831.823471968827
(2019-Dec-14.32347197)
0.0001317 TDB
period 1534.186257297996
4.20
1.033e-05
2.828e-08
d
yr
n .2346520823579993 1.58e-09 deg/d
Q 2.796197729274736 1.2552e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1396  
   data-arc span      8789 days (24.06 yr)  
   first obs. used      1997-02-12  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50544  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:38:09  

Additional Information
 Earth MOID = 1.40294 au 
 Jupiter MOID = 2.49972 au 
 T_jup = 3.365 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457248.5 (2015-Aug-14.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07519869207090223 3.7269e-08  
q 2.407432729182563 9.3763e-08 au
tp 2457300.684729071334
(2015-Oct-05.18472907)
0.00012972 TDB
node 161.1627814378919 1.8189e-05 deg
peri 158.5723508594405 3.5593e-05 deg
i 14.36695201306814 3.748e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1396  
   data-arc span      8789 days (24.06 yr)  
   first obs. used      1997-02-12  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50544  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:38:09  

Additional Information
 Jupiter MOID = 2.49972 au 
 T_jup = 3.365 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.3889763684916E-15 -3.474049824692998E-15 -2.373541211788709E-13 -1.1034870729075E-14 -9.896703038263947E-14 -9.866115404555185E-16
q -3.474049824692998E-15 8.791513020018234E-15 6.120842763345543E-13 2.9299470593878E-14 2.481925560717782E-13 3.138811798798799E-15
tp -2.373541211788709E-13 6.120842763345543E-13 1.682727493263976E-8 2.799225585756639E-11 3.993477908191856E-9 -1.434929803884084E-11
node -1.1034870729075E-14 2.9299470593878E-14 2.799225585756639E-11 3.308239086858165E-10 -3.128463745240356E-10 1.027725107729451E-11
peri -9.896703038263947E-14 2.481925560717782E-13 3.993477908191856E-9 -3.128463745240356E-10 1.266885506650986E-9 -1.332113560071934E-11
i -9.866115404555185E-16 3.138811798798799E-15 -1.434929803884084E-11 1.027725107729451E-11 -1.332113560071934E-11 1.404784207504157E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.52   n/a E2021B10  
diameter diameter 3.087 km 0.238 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.353   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21940 (1999 VU91)          Discovered 1999-Nov-07 by LINEAR at Socorro
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VU91 = 1997 CL29 = 1998 MB12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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