Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
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 ]  
13782 (1998 UM18)
Classification: Jupiter Trojan          SPK-ID: 2013782
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1341127032780164 6.4341e-08  
a 5.181781760517491 1.2153e-07 au
q 4.486839000817771 3.9199e-07 au
i 28.59179028800858 5.3939e-06 deg
node 150.1412932649115 1.0644e-05 deg
peri 232.4632656750382 2.284e-05 deg
M 338.1092633791543 2.148e-05 deg
tp 2459262.484126772769
(2021-Feb-16.98412677)
0.0002568 TDB
period 4308.410779945379
11.80
0.00015158
4.15e-07
d
yr
n .08355749216757925 2.9397e-09 deg/d
Q 5.876724520217211 1.3783e-07 au
  Orbit Determination Parameters
   # obs. used (total)      889  
   data-arc span      24265 days (66.43 yr)  
   first obs. used      1954-02-26  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51782  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:46:25  

Additional Information
 Earth MOID = 3.55814 au 
 Jupiter MOID = .166253 au 
 T_jup = 2.741 
[ 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 11.6   n/a MPO502273  
diameter diameter 24.971 km 0.294 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.086   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

13782 (1998 UM18)          Discovered 1998-Oct-28 by CSS at Catalina
Reference: 20000222/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 UM18 = 1989 EP3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-21 03:01 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin