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21899 (1999 VU8)
Classification: Main-belt Asteroid          SPK-ID: 2021899
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1470859667199286 5.1886e-08  
a 2.846309616172182 1.61e-08 au
q 2.427657414693267 1.4332e-07 au
i 13.94813347561844 4.9715e-06 deg
node 140.7940491134897 1.54e-05 deg
peri 234.4394905062593 2.1313e-05 deg
M 174.6867231617534 1.5795e-05 deg
tp 2458349.403049513466
(2018-Aug-18.90304951)
7.5772e-05 TDB
period 1753.967883932666
4.80
1.4882e-05
4.074e-08
d
yr
n .2052489120797494 1.7414e-09 deg/d
Q 3.264961817651097 1.8468e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1501  
   data-arc span      9101 days (24.92 yr)  
   first obs. used      1996-02-16  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49338  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:54:57  

Additional Information
 Earth MOID = 1.45324 au 
 Jupiter MOID = 2.26272 au 
 T_jup = 3.248 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.87   n/a E2021B10  
diameter diameter 5.393 km 0.378 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20.2235 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.221   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21899 (1999 VU8)          Discovered 1999-Nov-08 by Juels, C. W. at Fountain Hills
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VU8 = 1996 DY4 = 1997 FX4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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