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249138 (2008 AK4)
Classification: Main-belt Asteroid          SPK-ID: 2249138
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05192371588053711 4.2065e-08  
a 2.723936857566213 2.3857e-08 au
q 2.582499934097422 1.2259e-07 au
i 12.17957001588666 8.4405e-06 deg
node 302.3130554747536 2.4876e-05 deg
peri 113.6397851011734 9.5832e-05 deg
M 247.8225269121864 9.2502e-05 deg
tp 2459112.178457912595
(2020-Sep-19.67845791)
0.0004236 TDB
period 1642.078750555714
4.50
2.1572e-05
5.906e-08
d
yr
n .219234308877189 2.8801e-09 deg/d
Q 2.865373781035004 2.5095e-08 au
  Orbit Determination Parameters
   # obs. used (total)      323  
   data-arc span      7538 days (20.64 yr)  
   first obs. used      1999-01-07  
   last obs. used      2019-08-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56566  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 04:18:30  

Additional Information
 Earth MOID = 1.62276 au 
 Jupiter MOID = 2.32993 au 
 T_jup = 3.323 
[ 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 15.9   n/a MPO437157  
diameter diameter 4.525 km 0.262 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.041   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249138 (2008 AK4)          Discovered 2008-Jan-09 by LUSS at Lulin
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

Alternate Designations
 2008 AK4 = 2006 UU186 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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