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7540 (1997 AK21)
Classification: Main-belt Asteroid          SPK-ID: 2007540
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07738432714090741 6.2031e-08  
a 2.461171443178613 1.8647e-08 AU
q 2.27071534706982 1.5251e-07 AU
i 5.266560828300459 7.3346e-06 deg
node 216.4512150347227 6.2259e-05 deg
peri 302.1179423052054 7.8303e-05 deg
M 43.56549255693456 4.7641e-05 deg
tp 2456229.832292159189
(2012-Oct-29.33229216)		 0.00018644 JED
period 1410.299097213173
3.86		 1.6028e-05
4.388e-08		 d
yr
n .2552650006735305 2.9011e-09 deg/d
Q 2.651627539287406 2.009e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      1181  
   data-arc span      15786 days (43.22 yr)  
   first obs. used      1970-02-01  
   last obs. used      2013-04-22  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .52347  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 13:26:51  

Additional Information
 Earth MOID = 1.28391 AU 
 T_jup = 3.480 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4 mag n/a PDS3 (MPC 29296)  

7540 (1997 AK21)          Discovered 1997-Jan-09 by Ueda, S., Kaneda, H. at Kushiro (399)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1997 AK21 = 1970 CO = 1976 UL2 = 1979 OW11 = 1986 HE = 1987 QX12 = 1992 WA9 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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