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21502 Cruz (1998 KB9)
Classification: Main-belt Asteroid          SPK-ID: 2021502
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1232075251358374 6.8744e-08  
a 2.601150501392939 2.3016e-08 AU
q 2.280669185610472 1.7682e-07 AU
i 3.684766461545698 6.7898e-06 deg
node 115.8837466446524 0.00010949 deg
peri 206.0769831436265 0.00011311 deg
M 264.1419538509705 3.1864e-05 deg
tp 2457408.511797043621
(2016-Jan-21.01179704)
0.00013834 JED
period 1532.310044243384
4.20
2.0338e-05
5.568e-08
d
yr
n .234939398428181 3.1183e-09 deg/d
Q 2.921631817175406 2.5852e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      740  
   data-arc span      6343 days (17.37 yr)  
   first obs. used      1997-02-03  
   last obs. used      2014-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54124  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:46:45  

Additional Information
 Earth MOID = 1.26944 AU 
 T_jup = 3.401 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5 mag n/a MPO299116  

21502 Cruz           Discovered 1998 May 24 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Jose Cruz (b. 1946), operations group head 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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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