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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1342127755132271 5.849e-08  
a 5.182005914973009 1.1194e-07 au
q 4.486514518398521 3.485e-07 au
i 28.5918216481106 5.0406e-06 deg
node 150.1414605817477 9.4114e-06 deg
peri 232.5683942651369 1.9958e-05 deg
M 354.7427730825646 1.5366e-05 deg
tp 2459263.421563487016
(2021-Feb-17.92156349)
0.00018302 TDB
period 4308.690343991462
11.80
0.00013961
3.822e-07
d
yr
n .08355207064300312 2.7073e-09 deg/d
Q 5.877497311547495 1.2696e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1249  
   data-arc span      24457 days (66.96 yr)  
   first obs. used      1954-02-26  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48373  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 00:07:42  

Additional Information
 Earth MOID = 3.55663 au 
 Jupiter MOID = .165047 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 11.61   n/a E2021B10  
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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