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2223 Sarpedon (1977 TL3)
Classification: Jupiter Trojan          SPK-ID: 2002223
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01772377717356199 5.1771e-08  
a 5.246005665331954 8.3942e-08 au
q 5.153026629868367 3.2562e-07 au
i 15.94894118704857 5.1516e-06 deg
node 220.8778661329839 1.3196e-05 deg
peri 49.4863542271767 0.00012641 deg
M 334.885826909024 0.00012429 deg
tp 2459306.666692208197
(2021-Apr-02.16669221)
0.0015135 TDB
period 4388.757248573518
12.02
0.00010534
2.884e-07
d
yr
n .08202777679649773 1.9688e-09 deg/d
Q 5.338984700795541 8.543e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2395  
   data-arc span      15597 days (42.70 yr)  
   first obs. used      1977-10-04  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43922  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:42:24  

Additional Information
 Earth MOID = 4.15612 au 
 Jupiter MOID = .240706 au 
 T_jup = 2.922 
[ 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 9.1   n/a MPO473795 IRAS observations used: 11
diameter diameter 77.480 km 0.580 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 22.741 h n/a LCDB (Rev. 2019-August); 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:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
geometric albedo albedo 0.051   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
B-V BV 0.778   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.31, mean=6.23, max.=7.79) deg.
U-B UB 0.244   0.041 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=5.31, mean=6.55, max.=7.79) deg.
Tholen spectral type spec_T DU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

2223 Sarpedon           Discovered 1977 Oct. 4 at the Purple Mountain Observatory.
One of the leaders of the Lycians, Sarpedon was killed by Patroclus in the Trojan War. At the command of Zeus, his body was seized by Apollo and returned to Lycia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 6208Last Updated: 2006-03-21
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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