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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .123207552507502 6.0829e-08  
a 2.601150512610916 1.8773e-08 AU
q 2.280669124248492 1.6166e-07 AU
i 3.684768373732526 6.2577e-06 deg
node 115.8837821624551 9.4456e-05 deg
peri 206.0769583962034 9.789e-05 deg
M 264.1419387124845 2.6645e-05 deg
tp 2457408.511864118775
(2016-Jan-21.01186412)
0.00011459 JED
period 1532.31005415597
4.20
1.6589e-05
4.542e-08
d
yr
n .234939396908347 2.5434e-09 deg/d
Q 2.921631900973342 2.1086e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      792  
   data-arc span      6760 days (18.51 yr)  
   first obs. used      1997-02-03  
   last obs. used      2015-08-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52606  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:57:18  

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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