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4648 Tirion (1931 UE)
Classification: Main-belt Asteroid          SPK-ID: 2004648
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1859423380372347 1.8844e-08  
a 2.394088121462774 6.4939e-09 au
q 1.948925778690815 4.6175e-08 au
i 9.804778252580052 4.1203e-07 deg
node 319.5478299367106 4.3235e-06 deg
peri 123.7418004187567 6.2658e-06 deg
M 343.7721388614342 4.5885e-06 deg
tp 2459261.491232091107
(2021-Feb-15.99123209)
1.7219e-05 TDB
period 1353.033734101762
3.70
5.5051e-06
1.507e-08
d
yr
n .2660687541829791 1.0826e-09 deg/d
Q 2.839250464234734 7.7014e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2594  
   data-arc span      32665 days (89.43 yr)  
   first obs. used      1931-10-18  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .35736  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:45:53  

Additional Information
 Earth MOID = .98372 au 
 Jupiter MOID = 2.40347 au 
 T_jup = 3.487 
[ 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 13.39   n/a MPCxxxxx  
diameter diameter 10.017 km 0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.064   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4648 Tirion (1931 UE)          Discovered 1931-Oct-18 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1931 UE = 1977 CA1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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