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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1473201781629278 4.2979e-08  
a 2.845732934217906 1.4196e-08 au
q 2.426499051344813 1.2129e-07 au
i 13.94834481396053 3.9545e-06 deg
node 140.795575847402 1.5303e-05 deg
peri 234.4447070009388 2.0013e-05 deg
M 214.9192135485411 1.5469e-05 deg
tp 2460103.138079898502
(2023-Jun-07.63807990)
7.7448e-05 TDB
period 1753.434861952408
4.80
1.312e-05
3.592e-08
d
yr
n .2053113051483124 1.5363e-09 deg/d
Q 3.264966817090998 1.6287e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1739  
   data-arc span      9245 days (25.31 yr)  
   first obs. used      1996-02-16  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48335  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:11:51  

Additional Information
 Earth MOID = 1.45283 au 
 Jupiter MOID = 2.26318 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 13.89   n/a MPO614063  
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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