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9952 (1991 AK)
Classification: Main-belt Asteroid          SPK-ID: 2009952
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04298513382370463 5.9495e-08  
a 2.654987557789148 1.6123e-08 au
q 2.540862562317311 1.5997e-07 au
i 1.929865322456725 6.3251e-06 deg
node 332.7073440655715 0.000154 deg
peri 160.2023957030522 0.00017183 deg
M 312.0418972710511 7.857e-05 deg
tp 2457810.999784221853
(2017-Feb-26.49978422)
0.00034534 JED
period 1580.127611556328
4.33
1.4393e-05
3.941e-08
d
yr
n .2278297001882159 2.0753e-09 deg/d
Q 2.769112553260985 1.6816e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1413  
   data-arc span      14383 days (39.38 yr)  
   first obs. used      1976-09-24  
   last obs. used      2016-02-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47303  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 16:05:13  

Additional Information
 Earth MOID = 1.55373 au 
 Jupiter MOID = 2.23516 au 
 T_jup = 3.386 
[ 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 13.0 mag n/a MPO347605  

9952 (1991 AK)          Discovered 1991-Jan-09 by Arai, M., Mori, H. at Yorii
Reference: 19990202/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 AK = 1976 SV2 = 1989 SY6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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