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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1338562952004345 6.9181e-08  
a 5.182300156353334 1.3049e-07 au
q 4.488616656807245 4.2798e-07 au
i 28.58935455524666 5.4434e-06 deg
node 150.1415538984165 1.1073e-05 deg
peri 232.2694909602855 2.51e-05 deg
M 304.8279670172185 2.5804e-05 deg
tp 2459260.887369697069
(2021-Feb-15.38736970)
0.00031281 TDB
period 4309.057329193223
11.80
0.00016275
4.456e-07
d
yr
n .08354495484686487 3.1555e-09 deg/d
Q 5.875983655899424 1.4796e-07 au
  Orbit Determination Parameters
   # obs. used (total)      818  
   data-arc span      24012 days (65.74 yr)  
   first obs. used      1954-02-26  
   last obs. used      2019-11-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52843  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 23:00:18  

Additional Information
 Earth MOID = 3.55853 au 
 Jupiter MOID = .171781 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 ]
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