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21947 (1999 VG141)
Classification: Main-belt Asteroid          SPK-ID: 2021947
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01596601313831551 3.6873e-08  
a 2.891393412631277 1.4765e-08 au
q 2.845229387417167 1.0937e-07 au
i 1.217961654374424 4.2614e-06 deg
node 296.8097679571987 0.00019084 deg
peri 294.3886226104158 0.00023955 deg
M 279.1753196052987 0.00014576 deg
tp 2459603.681599012882
(2022-Jan-24.18159901)
0.00072729 TDB
period 1795.805129520224
4.92
1.3755e-05
3.766e-08
d
yr
n .2004671854880932 1.5355e-09 deg/d
Q 2.937557437845387 1.5001e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1113  
   data-arc span      9622 days (26.34 yr)  
   first obs. used      1994-11-10  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55654  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:56:09  

Additional Information
 Earth MOID = 1.83213 au 
 Jupiter MOID = 2.03145 au 
 T_jup = 3.290 
[ 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 14.88   n/a E2021B10  
diameter diameter 3.547 km 0.521 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.185   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21947 (1999 VG141)          Discovered 1999-Nov-10 by Spacewatch at Kitt Peak
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 VG141 = 1997 HO6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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