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21894 (1999 VQ4)
Classification: Main-belt Asteroid          SPK-ID: 2021894
[ 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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0509128463559949 3.2431e-08  
a 2.582212596814797 9.293e-09 au
q 2.450744803614651 8.6536e-08 au
i 14.94653821449583 3.301e-06 deg
node 172.871899201092 1.2512e-05 deg
peri 296.5616928277975 3.3364e-05 deg
M 26.9207277659937 3.076e-05 deg
tp 2459283.163260261199
(2021-Mar-09.66326026)		 0.00012951 TDB
period 1515.606363268851
4.15		 8.1817e-06
2.24e-08		 d
yr
n .2375286939436927 1.2822e-09 deg/d
Q 2.713680390014943 9.7661e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1860  
   data-arc span      11218 days (30.71 yr)  
   first obs. used      1990-07-24  
   last obs. used      2021-04-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4743  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:37:30  

Additional Information
 Earth MOID = 1.49725 au 
 Jupiter MOID = 2.33196 au 
 T_jup = 3.375 
[ 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 14.12   n/a MPCxxxxx  
diameter diameter 4.403 km 0.306 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.251   0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21894 (1999 VQ4)          Discovered 1999-Nov-01 by CSS at Catalina
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 VQ4 = 2000 CZ65 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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