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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1583447969479026 2.6564e-08  
a 3.033069278145891 1.5465e-08 au
q 2.552798539168958 7.9721e-08 au
i 14.47392304921993 4.142e-06 deg
node 60.48804013997649 1.3431e-05 deg
peri 236.4588238374373 2.0832e-05 deg
M 67.4416227369166 1.4208e-05 deg
tp 2458839.050662775502
(2019-Dec-21.55066278)
7.6715e-05 TDB
period 1929.398435568668
5.28
1.4756e-05
4.04e-08
d
yr
n .1865866548678393 1.4271e-09 deg/d
Q 3.513340017122824 1.7914e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1962  
   data-arc span      9191 days (25.16 yr)  
   first obs. used      1996-01-07  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46892  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:13:51  

Additional Information
 Earth MOID = 1.56746 au 
 Jupiter MOID = 1.74985 au 
 T_jup = 3.175 
[ 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 13.53   n/a E2021B10  
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. 2020-October); 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

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