Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.

JPL Small-Body Database Browser
Search: [ help ]  
2223 Sarpedon (1977 TL3)
Classification: Jupiter Trojan          SPK-ID: 2002223
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01772377248851032 5.2905e-08  
a 5.246005676901849 8.7894e-08 au
q 5.153026665811007 3.3597e-07 au
i 15.94894059411173 5.3485e-06 deg
node 220.8778692142702 1.4939e-05 deg
peri 49.48637458681137 0.00013839 deg
M 334.8858024145484 0.00013749 deg
tp 2459306.666991833023
0.0016756 TDB
period 4388.75726309241
n .08202777652513335 2.0615e-09 deg/d
Q 5.338984687992691 8.9451e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2185  
   data-arc span      15547 days (42.57 yr)  
   first obs. used      1977-10-04  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4499  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:36:27  

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] (  
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] (  
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 ]
FirstGov 2020-Jun-05 08:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin