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JPL Small-Body Database Browser
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312631 (2009 UR145)
Classification: Jupiter Trojan          SPK-ID: 2312631
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1425453729501689 1.4433e-07  
a 5.282869640586384 4.1571e-07 au
q 4.529821017421873 1.0328e-06 au
i 22.54173321932769 1.0106e-05 deg
node 106.4065581858808 2.2732e-05 deg
peri 318.7865726933894 4.5111e-05 deg
M 257.7216257756139 5.1061e-05 deg
tp 2459860.540729555504
(2022-Oct-08.04072956)
0.00074504 TDB
period 4435.098485676031
12.14
0.00052349
1.433e-06
d
yr
n .08117068903039841 9.5809e-09 deg/d
Q 6.035918263750895 4.7496e-07 au
  Orbit Determination Parameters
   # obs. used (total)      182  
   data-arc span      6300 days (17.25 yr)  
   first obs. used      2002-04-10  
   last obs. used      2019-07-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60975  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:02:10  

Additional Information
 Earth MOID = 3.57831 au 
 Jupiter MOID = .53176 au 
 T_jup = 2.827 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456747.5 (2014-Mar-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1435178210207983 1.4426e-07  
q 4.519720556660591 1.0305e-06 au
tp 2455433.145806125791
(2010-Aug-24.64580613)
0.0004319 TDB
node 106.4082235394922 2.2756e-05 deg
peri 318.973777662901 4.4854e-05 deg
i 22.53580583576116 1.0106e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      182  
   data-arc span      6300 days (17.25 yr)  
   first obs. used      2002-04-10  
   last obs. used      2019-07-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60975  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:02:10  

Additional Information
 Jupiter MOID = .53176 au 
 T_jup = 2.827 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.081128857425834E-14 -1.435375543401527E-13 9.684302787841673E-12 6.199766121214691E-14 -1.252099368576284E-12 7.853041562219898E-15
q -1.435375543401527E-13 1.061846604847798E-12 -2.068468228075378E-11 -4.017653009572932E-13 1.456221543774367E-11 -2.641159296575761E-14
tp 9.684302787841673E-12 -2.068468228075378E-11 1.865359399088074E-7 9.818011470906915E-11 1.533799622395993E-8 -2.569772062781525E-11
node 6.199766121214691E-14 -4.017653009572932E-13 9.818011470906915E-11 5.178164241795248E-10 -4.750432664059721E-10 -1.998437701481298E-11
peri -1.252099368576284E-12 1.456221543774367E-11 1.533799622395993E-8 -4.750432664059721E-10 2.011925206032762E-9 1.652963350955885E-11
i 7.853041562219898E-15 -2.641159296575761E-14 -2.569772062781525E-11 -1.998437701481298E-11 1.652963350955885E-11 1.021216459005107E-10

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.8   n/a MPO476404  
diameter diameter 16.574 km 0.614 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.059   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

312631 (2009 UR145)          Discovered 2009-Oct-21 by CSS at Catalina
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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