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18268 Dardanos (2140 T-3)
Classification: Jupiter Trojan          SPK-ID: 2018268
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09660891518551507 5.1591e-08  
a 5.160512625856888 1.1304e-07 au
q 4.6619610992717 3.2263e-07 au
i 16.59906280375237 6.6508e-06 deg
node 218.3875426959075 1.6449e-05 deg
peri 112.5181257875059 4.2362e-05 deg
M 279.7715979282486 4.3436e-05 deg
tp 2460154.752564715477
(2023-Jul-29.25256472)
0.00053827 TDB
period 4281.911572791125
11.72
0.0001407
3.852e-07
d
yr
n .08407459936528705 2.7625e-09 deg/d
Q 5.659064152442076 1.2396e-07 au
  Orbit Determination Parameters
   # obs. used (total)      772  
   data-arc span      15809 days (43.28 yr)  
   first obs. used      1977-10-07  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53526  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-23 19:22:01  

Additional Information
 Earth MOID = 3.69437 au 
 Jupiter MOID = .0233786 au 
 T_jup = 2.908 
[ 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 12.02   n/a E2021B10  
diameter diameter 20.352 km 0.586 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.074   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

18268 Dardanos           Discovered 1977 Oct. 16 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Dardanos was a son of Zeus and a nymph, mythical ancestor of the Trojans.
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
 2140 T-3 = 1997 LV12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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