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21500 Vazquez (1998 KS6)
Classification: Main-belt Asteroid          SPK-ID: 2021500
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1188235480753071 4.6938e-08  
a 2.326997985812755 7.7078e-09 au
q 2.05049582877439 1.0801e-07 au
i 4.28943691407822 3.6192e-06 deg
node 101.1349293669832 6.6384e-05 deg
peri 50.90843279006333 6.8179e-05 deg
M 200.5710085397037 1.7023e-05 deg
tp 2459774.692130364137
(2022-Jul-14.19213036)
6.2492e-05 TDB
period 1296.559459090397
3.55
6.442e-06
1.764e-08
d
yr
n .2776579180198636 1.3795e-09 deg/d
Q 2.603500142851119 8.6237e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1165  
   data-arc span      21918 days (60.01 yr)  
   first obs. used      1960-10-17  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52496  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:56:40  

Additional Information
 Earth MOID = 1.06434 au 
 Jupiter MOID = 2.39048 au 
 T_jup = 3.560 
[ 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 15.56   n/a E2020-QM5  
diameter diameter 4.847 km 0.208 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.057   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21500 Vasquez           Discovered 1998 May 22 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Angel Vasquez (b. 1955), PC network specialist and telescope operator at the Arecibo Observatory, has played a key role in numerous radar experiments on minor planets since the 1970s.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080718/MPCPages.arcLast Updated: 2008-07-18

Alternate Designations
 1998 KS6 = 1995 MK 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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