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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1230722216011211 7.4368e-08  
a 2.601295818677253 2.4717e-08 AU
q 2.281148563230937 1.9139e-07 AU
i 3.684777910864739 7.2927e-06 deg
node 115.8842271681718 0.00011732 deg
peri 206.0811774651621 0.00012143 deg
M 217.1377783160552 3.5366e-05 deg
tp 2457408.632116769399
(2016-Jan-21.13211677)
0.00015523 JED
period 1532.438453332462
4.20
2.1842e-05
5.98e-08
d
yr
n .2349197119252254 3.3483e-09 deg/d
Q 2.92144307412357 2.7759e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      731  
   data-arc span      6269 days (17.16 yr)  
   first obs. used      1997-02-03  
   last obs. used      2014-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5538  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:16:54  

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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