1749 Telamon

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1749 Telamon
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 23 September 1949
MPC designation (1749) Telamon
Pronunciation /ˈtɛləmɒn/ TEL-ə-mon
Named after
Telamon (Greek mythology)[2]
1949 SB · 1941 BP
1966 CN
Jupiter trojan[3]
(Greek camp)[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 66.86 yr (24,421 days)
Aphelion 5.7005 AU
Perihelion 4.5991 AU
5.1498 AU
Eccentricity 0.1069
11.69 yr (4,269 days)
0° 5m 3.48s / day
Inclination 6.0936°
Jupiter MOID 0.3165 AU
TJupiter 2.9770
Physical characteristics
Dimensions 64.898±0.666 km[5][6]
69.14±4.57 km[7]
80.84 km (derived)[8]
11.187±0.008 h[9]
16.975±0.001 h[10]
0.0428 (derived)[8]
D[11] · C[8]
9.20[7] · 9.4[5] · 9.5[1][8] · 9.64±0.39[11]

1749 Telamon (/ˈtɛləmɒn/ TEL-ə-mon), provisional designation 1949 SB, is a dark Jupiter Trojan from the Greek camp, approximately 70 kilometers in diameter.

It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 23 September 1949, and named after Telamon from Greek mythology.[2][3]

Classification and orbit[edit]

The Trojan asteroid shares the orbit of the gas giant Jupiter in the Greek Camp in the L4 Lagrangian point of the Sun–Jupiter system. It orbits the Sun at a distance of 4.6–5.7 AU once every 11 years and 8 months (4,269 days). Its orbit has an eccentricity of 0.11 and an inclination of 6° with respect to the ecliptic.[1]

Physical characteristics[edit]

Telamon has been characterized as a D-type asteroid by PanSTARRS' photometric survey.[11]

Diameter and albedo[edit]

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Telamon measures 69.14 and 64.898 kilometers in diameter and its surface has an albedo of 0.078 and 0.073, respectively.[5][6][7]

The Collaborative Asteroid Lightcurve Link derives a low albedo of 0.0428 and a diameter of 80.84 kilometers with on an absolute magnitude of 9.5.[8]


Photometric observations of Telamon by Stefano Mottola from 1995 were used to build a lightcurve rendering a rotation period of 11.2 hours with a brightness variation of 0.1±0.01 in magnitude (U=2).[9] In 2010, another observation at the Goat Mountain Astronomical Research Station (G79), California, gave a period of 16.9 hours (U=3-).[10]


This minor planet was named by the discoverer after Telamon, from Greek mythology, who was an argonaut searching for the Golden Fleece, and father of Ajax and Teucer, after whom the minor planets 1404 Ajax and 2797 Teucer are named.[2]

Telamon banished his son Teucer (as he had been banished by his own father) when he returned home from the Trojan war without the remains of his brother,[2] the official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 3023).[12]


  1. ^ a b c d "JPL Small-Body Database Browser: 1749 Telamon (1949 SB)" (2016-08-03 last obs.). Jet Propulsion Laboratory. Retrieved 8 June 2017. 
  2. ^ a b c d Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (1749) Telamon. Springer Berlin Heidelberg. p. 139. ISBN 978-3-540-00238-3. Retrieved 20 December 2016. 
  3. ^ a b "1749 Telamon (1949 SB)". Minor Planet Center. Retrieved 20 December 2016. 
  4. ^ "List of Jupiter Trojans". Minor Planet Center. 20 June 2016. Retrieved 20 December 2016. 
  5. ^ a b c d Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results" (PDF). The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 20 December 2016. 
  6. ^ a b c Grav, T.; Mainzer, A. K.; Bauer, J. M.; Masiero, J. R.; Nugent, C. R. (November 2012). "WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy". The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549Freely accessible. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. Retrieved 20 December 2016. 
  7. ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved 20 December 2016. 
  8. ^ a b c d e "LCDB Data for (1749) Telamon". Asteroid Lightcurve Database (LCDB). Retrieved 20 December 2016. 
  9. ^ a b Mottola, Stefano; Di Martino, Mario; Erikson, Anders; Gonano-Beurer, Maria; Carbognani, Albino; Carsenty, Uri; et al. (May 2011). "Rotational Properties of Jupiter Trojans. I. Light Curves of 80 Objects". The Astronomical Journal. 141 (5): 32. Bibcode:2011AJ....141..170M. doi:10.1088/0004-6256/141/5/170. Retrieved 20 December 2016. 
  10. ^ a b French, Linda M.; Stephens, Robert D.; Lederer, Susan M.; Coley, Daniel R.; Rohl, Derrick A. (April 2011). "Preliminary Results from a Study of Trojan Asteroids". The Minor Planet Bulletin. 38 (2): 116–120. Bibcode:2011MPBu...38..116F. ISSN 1052-8091. Retrieved 20 December 2016. 
  11. ^ a b c Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 20 December 2016. 
  12. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 20 December 2016. 

External links[edit]