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21904 (1999 VV12)
Classification: Main-belt Asteroid          SPK-ID: 2021904
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1069242945844348 1.2561e-08  
a 3.14203376913354 2.0349e-08 au
q 2.806074024808464 4.7022e-08 au
i 21.49203595337156 5.4524e-07 deg
node 73.4182241762192 2.1448e-06 deg
peri 115.2867269179992 9.7664e-06 deg
M 196.8272423142423 1.3085e-05 deg
tp 2460318.561421842755
(2024-Jan-09.06142184)
7.9462e-05 TDB
period 2034.298595986559
5.57
1.9763e-05
5.411e-08
d
yr
n .1769651715388485 1.7192e-09 deg/d
Q 3.477993513458618 2.2525e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2306  
   data-arc span      11931 days (32.67 yr)  
   first obs. used      1988-12-06  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3833  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:16  

Additional Information
 Earth MOID = 1.86865 au 
 Jupiter MOID = 1.70824 au 
 T_jup = 3.094 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456909.5 (2014-Sep-09.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1031450434792083 1.2857e-08  
q 2.822401398793821 4.7999e-08 au
tp 2456247.897986067091
(2012-Nov-16.39798607)
6.2863e-05 TDB
node 73.50063977620624 2.1424e-06 deg
peri 115.996953724999 9.9269e-06 deg
i 21.49549170053842 5.474e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2306  
   data-arc span      11931 days (32.67 yr)  
   first obs. used      1988-12-06  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .3833  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:46:16  

Additional Information
 Jupiter MOID = 1.70824 au 
 T_jup = 3.094 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.653065022433033E-16 -5.729539311876193E-16 3.506989455473578E-13 6.85996280671891E-15 3.978411357065642E-14 -1.392591222297657E-15
q -5.729539311876193E-16 2.303881675946077E-15 -8.826682628466291E-13 -2.146371439184621E-14 -6.709887263401338E-14 4.500296148710924E-15
tp 3.506989455473578E-13 -8.826682628466291E-13 3.951743030091757E-9 -7.002172283750823E-12 6.046603665666402E-10 2.379322474086871E-12
node 6.85996280671891E-15 -2.146371439184621E-14 -7.002172283750823E-12 4.589951242102617E-12 -5.285946815965536E-12 -1.040751367494692E-12
peri 3.978411357065642E-14 -6.709887263401338E-14 6.046603665666402E-10 -5.285946815965536E-12 9.854287206507082E-11 1.30294126091454E-12
i -1.392591222297657E-15 4.500296148710924E-15 2.379322474086871E-12 -1.040751367494692E-12 1.30294126091454E-12 2.996424721508681E-13

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 11.69   n/a E2021B10  
diameter diameter 14.847 km 3.586 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 5.4324 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.184   0.144 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21904 (1999 VV12)          Discovered 1999-Nov-11 by Juels, C. W. at Fountain Hills
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 VV12 = 1988 XY 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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