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JPL Small-Body Database Browser
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20128 (1996 AK)
Classification: Main-belt Asteroid          SPK-ID: 2020128
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1593343954691509 3.4702e-08  
a 3.035645221215826 1.8146e-08 au
q 2.551962525034585 1.1019e-07 au
i 14.48122041156253 5.295e-06 deg
node 60.51675286060079 1.4219e-05 deg
peri 236.70654143 2.1659e-05 deg
M 315.3468090230201 1.571e-05 deg
tp 2458840.121038681707
(2019-Dec-22.62103868)
8.4372e-05 TDB
period 1931.856873787277
5.29
1.7322e-05
4.743e-08
d
yr
n .186349208828418 1.6709e-09 deg/d
Q 3.519327917397066 2.1037e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1466  
   data-arc span      8632 days (23.63 yr)  
   first obs. used      1996-01-07  
   last obs. used      2019-08-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50766  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:29:16  

Additional Information
 Earth MOID = 1.56816 au 
 Jupiter MOID = 1.74705 au 
 T_jup = 3.174 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.4   n/a MPO358823  
diameter diameter 7.842 km 2.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 4.790 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.137   0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

20128 (1996 AK)          Discovered 1996-Jan-07 by AMOS at Haleakala
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1996 AK = 2000 AJ165 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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