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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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1473201778176598 4.2923e-08  
a 2.845732934147376 1.4186e-08 au
q 2.426499052267214 1.2115e-07 au
i 13.94834474499183 3.9441e-06 deg
node 140.7955758277677 1.5303e-05 deg
peri 234.4447070999427 2.0008e-05 deg
M 214.9192135114754 1.5467e-05 deg
tp 2460103.138080052766
(2023-Jun-07.63808005)
7.7444e-05 TDB
period 1753.434861887222
4.80
1.3112e-05
3.59e-08
d
yr
n .2053113051559451 1.5353e-09 deg/d
Q 3.264966816027539 1.6276e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1757  
   data-arc span      9275 days (25.39 yr)  
   first obs. used      1996-02-16  
   last obs. used      2021-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48177  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:03:28  

Additional Information
 Earth MOID = 1.45283 au 
 Jupiter MOID = 2.26318 au 
 T_jup = 3.248 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457729.5 (2016-Dec-07.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1460484451890647 4.2896e-08  
q 2.431035014786417 1.2088e-07 au
tp 2458349.587837891979
(2018-Aug-19.08783789)
7.3353e-05 TDB
node 140.8120710809978 1.5303e-05 deg
peri 234.5424129817313 2.0076e-05 deg
i 13.9453374993698 3.9432e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1757  
   data-arc span      9275 days (25.39 yr)  
   first obs. used      1996-02-16  
   last obs. used      2021-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48177  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:03:28  

Additional Information
 Jupiter MOID = 2.26318 au 
 T_jup = 3.248 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.840025358395116E-15 -5.159689835187024E-15 6.892933998298163E-13 2.668362791531421E-15 5.639707134961278E-14 2.821901618903997E-15
q -5.159689835187024E-15 1.461197670511441E-14 -1.719340799613323E-12 -9.195247607457277E-15 -1.295183676954645E-13 -7.463187819401634E-15
tp 6.892933998298163E-13 -1.719340799613323E-12 5.380708605952854E-9 -7.719139128430136E-12 9.62695498784346E-10 6.161541402231837E-13
node 2.668362791531421E-15 -9.195247607457277E-15 -7.719139128430136E-12 2.341816833802931E-10 -2.285547552705909E-10 1.329932050984083E-11
peri 5.639707134961278E-14 -1.295183676954645E-13 9.62695498784346E-10 -2.285547552705909E-10 4.030620905067752E-10 -1.291859651965839E-11
i 2.821901618903997E-15 -7.463187819401634E-15 6.161541402231837E-13 1.329932050984083E-11 -1.291859651965839E-11 1.554892231446594E-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 13.90   n/a MPO636392  
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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