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295811 (2008 UM321)
Classification: Main-belt Asteroid          SPK-ID: 2295811
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09931951402000071 5.1138e-08  
a 2.277220529706849 1.2703e-08 au
q 2.051048093379996 1.1494e-07 au
i 4.931958787936574 3.8914e-06 deg
node 260.9957974280715 5.5537e-05 deg
peri 245.0645790854915 6.139e-05 deg
M 29.96083573892764 2.313e-05 deg
tp 2458896.038204727224
(2020-Feb-16.53820473)
8.088e-05 TDB
period 1255.180150042955
3.44
1.0503e-05
2.876e-08
d
yr
n .2868114190522214 2.3999e-09 deg/d
Q 2.503392966033702 1.3965e-08 au
  Orbit Determination Parameters
   # obs. used (total)      408  
   data-arc span      8807 days (24.11 yr)  
   first obs. used      1996-03-13  
   last obs. used      2020-04-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54592  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 18:44:56  

Additional Information
 Earth MOID = 1.06892 au 
 Jupiter MOID = 2.51966 au 
 T_jup = 3.597 
[ 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 17.0   n/a MPO440402  
diameter diameter 1.565 km 0.258 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.114   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

295811 (2008 UM321)          Discovered 2008-Oct-31 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

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