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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0430328822152418 5.9725e-08  
a 2.655421931959042 1.6314e-08 au
q 2.541151472729279 1.6038e-07 au
i 1.929884462468793 6.4589e-06 deg
node 332.7131334509473 0.00015403 deg
peri 159.986601877019 0.00017188 deg
M 266.6917545671404 7.8527e-05 deg
tp 2457810.153109737196
(2017-Feb-25.65310974)
0.00034569 JED
period 1580.515406985194
4.33
1.4565e-05
3.988e-08
d
yr
n .2277737998686732 2.099e-09 deg/d
Q 2.769692391188805 1.7016e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1386  
   data-arc span      14323 days (39.21 yr)  
   first obs. used      1976-09-24  
   last obs. used      2015-12-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4727  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:12:30  

Additional Information
 Earth MOID = 1.55541 au 
 Jupiter MOID = 2.2351 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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