Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
4648 Tirion (1931 UE)
Classification: Main-belt Asteroid          SPK-ID: 2004648
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1858264048219102 5.073e-08  
a 2.39405707712046 1.2969e-08 AU
q 1.949178057540715 1.1759e-07 AU
i 9.794909126605333 8.1809e-06 deg
node 319.713692289951 3.1372e-05 deg
peri 122.9955846523694 4.1085e-05 deg
M 119.3461139308512 2.261e-05 deg
tp 2456551.955063003621
(2013-Sep-16.45506300)
8.5018e-05 JED
period 1353.007416833492
3.70
1.0994e-05
3.01e-08
d
yr
n .2660739294707823 2.1621e-09 deg/d
Q 2.838936096700206 1.5379e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      828  
   data-arc span      30193 days (82.66 yr)  
   first obs. used      1931-10-18  
   last obs. used      2014-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49633  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:09:53  

Additional Information
 Earth MOID = .984245 AU 
 T_jup = 3.487 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.2 mag n/a MPO298995  
diameter diameter 12.29 km 0.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4
geometric albedo albedo 0.0614   0.009 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4

4648 Tirion (1931 UE)          Discovered 1931-Oct-18 by Reinmuth, K. at Heidelberg (024)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1931 UE = 1977 CA1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Oct-01 22:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin