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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 ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1230722229549698 7.4417e-08  
a 2.601295819962224 2.4898e-08 AU
q 2.281148560836002 1.9144e-07 AU
i 3.684777112277535 7.3729e-06 deg
node 115.8842419392086 0.00011877 deg
peri 206.0811608167962 0.00012288 deg
M 217.137779535271 3.5485e-05 deg
tp 2457408.632112030075
(2016-Jan-21.13211203)
0.00015565 JED
period 1532.438454467938
4.20
2.2001e-05
6.024e-08
d
yr
n .2349197117511592 3.3728e-09 deg/d
Q 2.921443079088446 2.7962e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      710  
   data-arc span      6240 days (17.08 yr)  
   first obs. used      1997-02-03  
   last obs. used      2014-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55585  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 11:14:43  

Additional Information
 Earth MOID = 1.26804 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 14.4 mag n/a MPO259496  

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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