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JPL Small-Body Database Browser
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2503 Liaoning (1965 UB1)
Classification: Main-belt Asteroid          SPK-ID: 2002503
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2127055201297589 5.4952e-08  
a 2.19308889967849 5.6663e-09 au
q 1.726606784581576 1.2077e-07 au
i 7.103520143926469 5.0656e-06 deg
node 11.83442213990674 2.8455e-05 deg
peri 16.11585778550699 2.9526e-05 deg
M 292.7109005693454 7.6092e-06 deg
tp 2459222.230275753731
(2021-Jan-07.73027575)
2.5367e-05 TDB
period 1186.267908869925
3.25
4.5974e-06
1.259e-08
d
yr
n .3034727630312 1.1761e-09 deg/d
Q 2.659571014775404 6.8715e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1660  
   data-arc span      19918 days (54.53 yr)  
   first obs. used      1965-10-16  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47395  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:40:52  

Additional Information
 Earth MOID = .732133 au 
 Jupiter MOID = 2.79952 au 
 T_jup = 3.632 
[ 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 14.4   n/a MPO381274  
diameter diameter 6.714 km 0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.078   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2503 Liaoning (1965 UB1)          Discovered 1965-Oct-16 by Purple Mountain Observatory at Nanking
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1965 UB1 = 1978 SG5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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