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21898 (1999 VJ7)
Classification: Main-belt Asteroid          SPK-ID: 2021898
[ 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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1432141750434988 3.3934e-08  
a 3.134253143110696 1.9427e-08 au
q 2.685383664842605 1.0962e-07 au
i 9.218037581427668 3.8807e-06 deg
node 48.34073319695025 2.4234e-05 deg
peri 12.64925176201056 2.9762e-05 deg
M 281.5852820640695 2.0508e-05 deg
tp 2459641.963310587338
(2022-Mar-03.46331059)		 0.00011804 TDB
period 2026.746967849762
5.55		 1.8843e-05
5.159e-08		 d
yr
n .1776245410555296 1.6514e-09 deg/d
Q 3.583122621378788 2.2209e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1587  
   data-arc span      11664 days (31.93 yr)  
   first obs. used      1988-11-02  
   last obs. used      2020-10-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49722  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:54:19  

Additional Information
 Earth MOID = 1.6981 au 
 Jupiter MOID = 1.78681 au 
 T_jup = 3.177 
[ 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 13.2   n/a MPO358837  
diameter diameter 12.909 km 0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.031   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

21898 (1999 VJ7)          Discovered 1999-Nov-07 by Korlevic, K. at Visnjan
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 VJ7 = 1988 VY5 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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