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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07806596596753772 5.0341e-08  
a 2.461298107781485 1.4521e-08 au
q 2.269154493463451 1.2481e-07 au
i 5.26708162109778 5.1977e-06 deg
node 216.4258145599039 5.4578e-05 deg
peri 302.4085541097604 6.5241e-05 deg
M 349.5896510249415 3.7632e-05 deg
tp 2457641.285664362421
(2016-Sep-09.78566436)
0.00014752 JED
period 1410.407970534813
3.86
1.2481e-05
3.417e-08
d
yr
n .2552452960567796 2.2588e-09 deg/d
Q 2.65344172209952 1.5654e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1515  
   data-arc span      16832 days (46.08 yr)  
   first obs. used      1970-02-01  
   last obs. used      2016-03-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5024  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:56:49  

Additional Information
 Earth MOID = 1.28143 au 
 Jupiter MOID = 2.34169 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 13.3 mag n/a MPO358704  

7540 (1997 AK21)          Discovered 1997-Jan-09 by Ueda, S., Kaneda, H. at Kushiro
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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