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JPL Small-Body Database Browser
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442475 (2011 UR309)
Classification: Main-belt Asteroid          SPK-ID: 2442475
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2204644261128728 7.4129e-08  
a 2.668234231929968 4.8061e-08 au
q 2.079983503252806 1.9613e-07 au
i 18.73176335963743 7.7185e-06 deg
node 58.67759760738522 2.501e-05 deg
peri 312.115868100301 3.0843e-05 deg
M 270.6444880863909 2.6313e-05 deg
tp 2458995.642006423189
(2020-May-26.14200642)
0.00012493 TDB
period 1591.968075230541
4.36
4.3012e-05
1.178e-07
d
yr
n .2261351880111455 6.1098e-09 deg/d
Q 3.25648496060713 5.8657e-08 au
  Orbit Determination Parameters
   # obs. used (total)      131  
   data-arc span      7084 days (19.39 yr)  
   first obs. used      1998-11-19  
   last obs. used      2018-04-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56425  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 15:24:49  

Additional Information
 Earth MOID = 1.12518 au 
 Jupiter MOID = 2.30432 au 
 T_jup = 3.273 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.3   n/a MPO440832  

442475 (2011 UR309)          Discovered 2011-Sep-24 by CSS at Catalina
Reference: Last Updated: 2015-09-02

Alternate Designations
 2011 UR309 = 2014 HO157 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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