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9952 (1991 AK)
Classification: Main-belt Asteroid          SPK-ID: 2009952
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04486320622433546 2.5773e-08  
a 2.655409115369263 9.4053e-09 au
q 2.536278948616472 7.1039e-08 au
i 1.928574481005476 8.489e-07 deg
node 332.533958605704 2.5448e-05 deg
peri 159.8213377535275 3.655e-05 deg
M 317.00854984682 2.7426e-05 deg
tp 2459389.244881659945
(2021-Jun-23.74488166)
0.00012068 TDB
period 1580.50396428775
4.33
8.3971e-06
2.299e-08
d
yr
n .2277754489291857 1.2102e-09 deg/d
Q 2.774539282122054 9.8273e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2550  
   data-arc span      16252 days (44.50 yr)  
   first obs. used      1976-09-24  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44808  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:27:25  

Additional Information
 Earth MOID = 1.55044 au 
 Jupiter MOID = 2.22664 au 
 T_jup = 3.386 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.12   n/a E2021B10  
diameter diameter 7.340 km 0.242 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.227   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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