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249331 (2008 UB355)
Classification: Outer Main-belt Asteroid          SPK-ID: 2249331
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1318652764461517 5.4474e-08  
a 3.210640613222878 4.7049e-08 au
q 2.787268601191002 1.7965e-07 au
i 5.35482720651314 5.5777e-06 deg
node 60.27777067258789 5.9262e-05 deg
peri 152.9552777660348 6.3114e-05 deg
M 209.6471824221849 2.5198e-05 deg
tp 2459878.096817681760
(2022-Oct-25.59681768)
0.00016013 TDB
period 2101.289882392271
5.75
4.6188e-05
1.265e-07
d
yr
n .1713233395433039 3.7659e-09 deg/d
Q 3.634012625254755 5.3253e-08 au
  Orbit Determination Parameters
   # obs. used (total)      251  
   data-arc span      5378 days (14.72 yr)  
   first obs. used      2005-03-08  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65175  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:18:41  

Additional Information
 Earth MOID = 1.78218 au 
 Jupiter MOID = 1.33622 au 
 T_jup = 3.171 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457318.5 (2015-Oct-23.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .133696508042412 5.415e-08  
q 2.780099993379372 1.79e-07 au
tp 2457780.551308881216
(2017-Jan-27.05130888)
0.00013069 TDB
node 60.35633555422218 5.9351e-05 deg
peri 153.5440113487718 6.3159e-05 deg
i 5.352732072359022 5.5735e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      251  
   data-arc span      5378 days (14.72 yr)  
   first obs. used      2005-03-08  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65175  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 00:18:41  

Additional Information
 Jupiter MOID = 1.33622 au 
 T_jup = 3.171 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.932197070725029E-15 -9.440050591090976E-15 -8.165343591067767E-13 -4.024369842730334E-16 -6.020074384368809E-14 -1.578361924515032E-15
q -9.440050591090976E-15 3.204193653120116E-14 5.317391439169772E-12 -1.468309829124019E-15 5.774486771522843E-13 7.260959612111477E-15
tp -8.165343591067767E-13 5.317391439169772E-12 1.708115544668901E-8 -3.942970684571277E-11 2.852432199892019E-9 9.526141231246058E-12
node -4.024369842730334E-16 -1.468309829124019E-15 -3.942970684571277E-11 3.522500164306905E-9 -3.513707666166149E-9 -5.493789544881999E-11
peri -6.020074384368809E-14 5.774486771522843E-13 2.852432199892019E-9 -3.513707666166149E-9 3.989007858041092E-9 5.617254915992407E-11
i -1.578361924515032E-15 7.260959612111477E-15 9.526141231246058E-12 -5.493789544881999E-11 5.617254915992407E-11 3.106415795318017E-11

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 15.5   n/a MPO454848  
diameter diameter 3.426 km 0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.125   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

249331 (2008 UB355)          Discovered 2008-Oct-31 by Spacewatch at Kitt Peak
Reference: 20100824/Numbers.arcLast Updated: 2010-08-27

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