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18278 Drymas (4035 T-3)
Classification: Jupiter Trojan          SPK-ID: 2018278
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06882301219250582 5.621e-08  
a 5.178264694601121 8.9369e-08 au
q 4.821880920388566 3.1934e-07 au
i 17.9302388098062 6.3877e-06 deg
node 31.52716304130049 1.3084e-05 deg
peri 208.2787349863614 4.3395e-05 deg
M 15.9467329715432 3.9081e-05 deg
tp 2459205.846835789504
(2020-Dec-22.34683579)
0.00046924 TDB
period 4304.025108983594
11.78
0.00011142
3.051e-07
d
yr
n .08364263471618429 2.1653e-09 deg/d
Q 5.534648468813676 9.5519e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1421  
   data-arc span      15958 days (43.69 yr)  
   first obs. used      1977-10-11  
   last obs. used      2021-06-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48424  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:35:25  

Additional Information
 Earth MOID = 3.82202 au 
 Jupiter MOID = .50883 au 
 T_jup = 2.899 
[ 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 11.44   n/a E2021B10  
diameter diameter 28.885 km 0.385 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 28.087 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.077   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

18278 Drymas           Discovered 1977 Oct. 16 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Drymas was a king of Phrygia and father of Priam's second wife Hekabe (in Latin, Hecuba).
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 4035 T-3 = 1988 SF2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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