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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09684428939593322 5.0813e-08  
a 5.160273577690887 9.4723e-08 au
q 4.660530549970803 3.2208e-07 au
i 16.59989153907216 5.7503e-06 deg
node 218.3891134301113 1.4464e-05 deg
peri 112.5893234693002 3.5592e-05 deg
M 296.2070372026012 3.4636e-05 deg
tp 2460155.213461022547
(2023-Jul-29.71346102)
0.00042329 TDB
period 4281.614052565281
11.72
0.00011789
3.228e-07
d
yr
n .08408044152982684 2.3151e-09 deg/d
Q 5.660016605410971 1.039e-07 au
  Orbit Determination Parameters
   # obs. used (total)      937  
   data-arc span      16011 days (43.84 yr)  
   first obs. used      1977-10-07  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52934  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:08:02  

Additional Information
 Earth MOID = 3.69392 au 
 Jupiter MOID = .0235672 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 12.05   n/a MPO636339  
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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