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249311 (2008 UM128)
Classification: Outer Main-belt Asteroid          SPK-ID: 2249311
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06804164561502778 5.3621e-08  
a 3.375384955704749 5.0424e-08 au
q 3.14571820873439 2.0576e-07 au
i 9.549401819900295 5.9554e-06 deg
node 236.2566109628913 3.2445e-05 deg
peri 107.3309504402469 5.4897e-05 deg
M 26.76537865419206 4.3853e-05 deg
tp 2458832.095270748698
(2019-Dec-14.59527075)
0.00027581 TDB
period 2265.079202269138
6.20
5.0756e-05
1.39e-07
d
yr
n .1589348397351205 3.5614e-09 deg/d
Q 3.605051702675107 5.3855e-08 au
  Orbit Determination Parameters
   # obs. used (total)      248  
   data-arc span      6556 days (17.95 yr)  
   first obs. used      2001-09-10  
   last obs. used      2019-08-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60029  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 04:18:38  

Additional Information
 Earth MOID = 2.15693 au 
 Jupiter MOID = 1.7177 au 
 T_jup = 3.126 
[ 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 15.2   n/a MPO450107  
diameter diameter 5.713 km 0.834 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249311 (2008 UM128)          Discovered 2008-Oct-22 by Spacewatch at Kitt Peak
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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