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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06826249233028364 5.3624e-08  
a 3.37639660559733 5.0925e-08 au
q 3.145915358203747 2.0576e-07 au
i 9.549502054770311 5.9555e-06 deg
node 236.2607833201574 3.244e-05 deg
peri 107.0008535122881 5.4751e-05 deg
M 323.4932473938789 4.3637e-05 deg
tp 2458830.299622726913
(2019-Dec-12.79962273)
0.00027478 TDB
period 2266.097592252495
6.20
5.1269e-05
1.404e-07
d
yr
n .1588634140165874 3.5942e-09 deg/d
Q 3.606877852990914 5.4402e-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 = 2.15621 au 
 Jupiter MOID = 1.71508 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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