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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1851998646883178 3.5111e-08  
a 2.395980526025152 1.0494e-08 au
q 1.95224525680945 8.3301e-08 au
i 9.795513822660656 6.8352e-06 deg
node 319.5820717969141 2.6946e-05 deg
peri 123.4524809444645 3.445e-05 deg
M 184.4480186428899 2.0931e-05 deg
tp 2459261.081774647408
(2021-Feb-15.58177465)
8.0192e-05 TDB
period 1354.638307324551
3.71
8.8997e-06
2.437e-08
d
yr
n .2657535949289742 1.7459e-09 deg/d
Q 2.839715795240854 1.2438e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1378  
   data-arc span      31979 days (87.55 yr)  
   first obs. used      1931-10-18  
   last obs. used      2019-05-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45225  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 00:35:58  

Additional Information
 Earth MOID = .987389 au 
 Jupiter MOID = 2.4049 au 
 T_jup = 3.486 
[ 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 13.3   n/a MPO448960  
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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