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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1974972983988871 4.0037e-08  
a 2.267058935465113 1.6817e-08 au
q 1.819320920399696 9.4101e-08 au
i 6.81930631251447 5.8123e-06 deg
node 83.41349478222689 4.0285e-05 deg
peri 225.3643609770123 4.4321e-05 deg
M 232.0806093548094 2.0635e-05 deg
tp 2459443.523254989555
(2021-Aug-17.02325499)
7.4772e-05 TDB
period 1246.788082649736
3.41
1.3873e-05
3.798e-08
d
yr
n .2887419321773675 3.2129e-09 deg/d
Q 2.71479695053053 2.0139e-08 au
  Orbit Determination Parameters
   # obs. used (total)      189  
   data-arc span      5698 days (15.60 yr)  
   first obs. used      2004-06-27  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61737  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 17:55:45  

Additional Information
 Earth MOID = .812003 au 
 Jupiter MOID = 2.54527 au 
 T_jup = 3.580 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456979.5 (2014-Nov-18.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1982383067475769 4.0044e-08  
q 1.817629897363829 9.4143e-08 au
tp 2456949.490424942872
(2014-Oct-18.99042494)
5.8678e-05 TDB
node 83.47310152687311 4.0297e-05 deg
peri 225.273641817819 4.4285e-05 deg
i 6.818804758893827 5.8109e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      189  
   data-arc span      5698 days (15.60 yr)  
   first obs. used      2004-06-27  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61737  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 17:55:45  

Additional Information
 Jupiter MOID = 2.54527 au 
 T_jup = 3.580 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.603483851381654E-15 -3.732439206986343E-15 -5.463879093925263E-13 -4.766838020428098E-15 -1.146570339823909E-13 -1.596415486840055E-15
q -3.732439206986343E-15 8.862955141314986E-15 1.557739014599777E-12 9.56617455746757E-15 3.556556225247593E-13 4.282280275956322E-15
tp -5.463879093925263E-13 1.557739014599777E-12 3.443142367466845E-9 -2.117849342448526E-12 1.092266552893749E-9 1.118894111572278E-12
node -4.766838020428098E-15 9.56617455746757E-15 -2.117849342448526E-12 1.623867968573299E-9 -1.612242271177998E-9 -6.549531916133279E-11
peri -1.146570339823909E-13 3.556556225247593E-13 1.092266552893749E-9 -1.612242271177998E-9 1.961142117099136E-9 6.536021070761716E-11
i -1.596415486840055E-15 4.282280275956322E-15 1.118894111572278E-12 -6.549531916133279E-11 6.536021070761716E-11 3.376607360438855E-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 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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