Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
29422 (1997 AH21)
Classification: Main-belt Asteroid          SPK-ID: 2029422
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 .2049216138116262 6.8886e-08  
a 3.114655259916114 3.354e-08 AU
q 2.476395077587234 2.139e-07 AU
i 18.55365353934744 7.545e-06 deg
node 115.8979533198649 2.4206e-05 deg
peri 320.6248569156485 3.1332e-05 deg
M 118.5009821562478 1.9849e-05 deg
tp 2456339.604411754003
(2013-Feb-16.10441175)
0.00010621 JED
period 2007.767424702436
5.50
3.2431e-05
8.879e-08
d
yr
n .1793036362532649 2.8962e-09 deg/d
Q 3.752915442244994 4.0413e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      834  
   data-arc span      6646 days (18.20 yr)  
   first obs. used      1996-12-18  
   last obs. used      2015-02-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49335  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 15:32:18  

Additional Information
 Earth MOID = 1.51873 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
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Mar-31 11:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin