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305554 (2008 UM187)
Classification: Main-belt Asteroid          SPK-ID: 2305554
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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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 .1974972985051397 4.0036e-08  
a 2.267058935341366 1.6814e-08 au
q 1.819320920059508 9.4101e-08 au
i 6.819306338826125 5.8003e-06 deg
node 83.41349459725625 4.025e-05 deg
peri 225.3643613993569 4.4271e-05 deg
M 232.0806092303407 2.0616e-05 deg
tp 2459443.523255384354
(2021-Aug-17.02325538)
7.4713e-05 TDB
period 1246.788082547652
3.41
1.387e-05
3.797e-08
d
yr
n .288741932201009 3.2122e-09 deg/d
Q 2.714796950623224 2.0134e-08 au
  Orbit Determination Parameters
   # obs. used (total)      193  
   data-arc span      5716 days (15.65 yr)  
   first obs. used      2004-06-27  
   last obs. used      2020-02-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61151  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 19:11:33  

Additional Information
 Earth MOID = .812003 au 
 Jupiter MOID = 2.54527 au 
 T_jup = 3.580 
[ 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 17.3   n/a MPO471209  

305554 (2008 UM187)          Discovered 2008-Oct-24 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Alternate Designations
 2008 UM187 = 2005 YZ147 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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