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17418 (1988 RT12)
Classification: Jupiter Trojan          SPK-ID: 2017418
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1599606488558547 6.1668e-08  
a 5.187576832889899 1.1298e-07 au
q 4.357768676711231 3.2209e-07 au
i 6.503198240018711 6.646e-06 deg
node 197.6106599539944 4.9808e-05 deg
peri 135.6751552885667 5.3059e-05 deg
M 216.2666345122379 2.1953e-05 deg
tp 2460323.559735047149
(2024-Jan-14.05973505)
0.00030331 TDB
period 4315.640300440804
11.82
0.00014098
3.86e-07
d
yr
n .0834175174337929 2.7251e-09 deg/d
Q 6.017384989068567 1.3105e-07 au
  Orbit Determination Parameters
   # obs. used (total)      643  
   data-arc span      15173 days (41.54 yr)  
   first obs. used      1977-10-18  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .518  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:30:52  

Additional Information
 Earth MOID = 3.35101 au 
 Jupiter MOID = .0733512 au 
 T_jup = 2.962 
[ 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 12.2   n/a MPO350941  
diameter diameter 15.806 km 1.445 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
rotation period rot_per 6.075 h n/a LCDB (Rev. 2019-January); 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.]
geometric albedo albedo 0.135   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

17418 (1988 RT12)          Discovered 1988-Sep-14 by Bus, S. J. at Cerro Tololo
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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