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29422 (1997 AH21)
Classification: Main-belt Asteroid          SPK-ID: 2029422
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2050453905867528 7.2475e-08  
a 3.11466472004788 3.677e-08 AU
q 2.476017075978883 2.2616e-07 AU
i 18.55372020558702 8.3129e-06 deg
node 115.8991936998305 2.5203e-05 deg
peri 320.630862919461 3.3456e-05 deg
M 82.61804319676691 2.1353e-05 deg
tp 2456339.726190128097
(2013-Feb-16.22619013)
0.0001158 JED
period 2007.776571987078
5.50
3.5554e-05
9.734e-08
d
yr
n .1793028193588848 3.1751e-09 deg/d
Q 3.753312364116877 4.4309e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      788  
   data-arc span      6316 days (17.29 yr)  
   first obs. used      1996-12-18  
   last obs. used      2014-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52185  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:28:39  

Additional Information
 Earth MOID = 1.51798 AU 
 T_jup = 3.106 
[ 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 12.4 mag n/a MPO259542  

29422 (1997 AH21)          Discovered 1997-Jan-09 by Ueda, S., Kaneda, H. at Kushiro (399)
Reference: 20011002/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 AH21 = 1998 GK9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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