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21953 (1999 VB176)
Classification: Main-belt Asteroid          SPK-ID: 2021953
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .113666265157562 4.4348e-08  
a 2.732804710421456 1.3322e-08 au
q 2.422177005582856 1.2372e-07 au
i 5.846066691103124 3.8221e-06 deg
node 87.26903245913732 4.9585e-05 deg
peri 319.0718850294257 5.2793e-05 deg
M 226.7924354626046 1.9202e-05 deg
tp 2459811.073161674503
(2022-Aug-19.57316167)
8.9661e-05 TDB
period 1650.10402349271
4.52
1.2066e-05
3.303e-08
d
yr
n .2181680638763622 1.5953e-09 deg/d
Q 3.043432415260055 1.4836e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1228  
   data-arc span      10440 days (28.58 yr)  
   first obs. used      1992-02-05  
   last obs. used      2020-09-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51292  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:56:14  

Additional Information
 Earth MOID = 1.43488 au 
 Jupiter MOID = 2.31003 au 
 T_jup = 3.337 
[ 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 14.57   n/a E2021B10  
diameter diameter 6.205 km 0.288 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.087   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21953 (1999 VB176)          Discovered 1999-Nov-02 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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