2223 Sarpedon
Discovery [1] | |
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Discovered by | Purple Mountain Obs. |
Discovery site | Purple Mountain Obs. |
Discovery date | 4 October 1977 |
Designations | |
MPC designation | (2223) Sarpedon |
Pronunciation | /sɑːrˈpiːdən/ sar-PEE-dən |
Named after | Sarpedon (Greek mythology)[2] |
1977 TL3 | |
Jupiter trojan [1][3][4] Trojan [5][6] · background [6] | |
Orbital characteristics [3] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 40.63 yr (14,840 d) |
Aphelion | 5.3172 AU |
Perihelion | 5.1541 AU |
5.2357 AU | |
Eccentricity | 0.0156 |
11.98 yr (4,376 d) | |
266.05° | |
0° 4m 56.28s / day | |
Inclination | 15.960° |
220.88° | |
52.434° | |
Jupiter MOID | 0.2369 AU |
TJupiter | 2.9220 |
Physical characteristics | |
Mean diameter |
±0.58 km 77.48[7] ±4.0 km 94.63[8] ±6.15 km 108.21[9] |
±0.04 h 22.741[10] ±0.04 h 22.77[10] | |
±0.003 0.027[9] ±0.003 0.0340[8] ±0.005 0.051[7] | |
Tholen = DU [3] U–B = 0.244[3] B–V = 0.778[3] B–V = ±0.032 0.753[11] B–V = ±0.050 0.740[12] V–R = ±0.025 0.465[11] V–R = ±0.030 0.440[12] V–I = ±0.033 0.905[11] V–I = ±0.038 0.880[4] | |
9.41[1][3][4][8][9] | |
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2223 Sarpedon, provisional designation 1977 TL3, is a dark Jupiter trojan from the Trojan camp, approximately 90 kilometers (56 miles) in diameter. It was discovered on 4 October 1977, by astronomers at the Purple Mountain Observatory near Nanking, China.[1] The D-type asteroid belongs to the 30 largest Jupiter trojans and has a rotation period of 22.7 hours.[4] It was named after the Lycian hero Sarpedon from Greek mythology.[2]
Orbit and classification
Sarpedon is orbiting in the trailering Trojan camp, at Jupiter's L5 Lagrangian point, 60° behind the Gas Giant's orbit in a 1:1 resonance . It is also a non-family asteroid of the Jovian background population.[6][13]
It orbits the Sun at a distance of 5.2–5.3 AU once every 11 years and 12 months (4,376 days; semi-major axis of 5.24 AU). Its orbit has an eccentricity of 0.02 and an inclination of 16° with respect to the ecliptic.[3] The body's observation arc begins with its official discovery observation at Nanking.[1]
Physical characteristics
In the Tholen classification, Sarpedon is similar to a dark D-type asteroid, though with an unusual spectrum (DU).[4][3]
Rotation period
In April 1996, a rotational lightcurve of Sarpedon was obtained from photometric observations by Italian astronomer Stefano Mottola at ESO's La Silla Observatory using the Bochum 0.61-metre Telescope. Lightcurve analysis gave a rotation period of 22.741 hours with a brightness amplitude of 0.14 magnitude (U=2+).[10] A previous observation by Mottola gave a similar period of 22.77 hours from a lower-rated lightcurve (U=2).[4][10]
Diameter and albedo
According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Sarpedon measures between 77.48 and 108.21 kilometers in diameter and its surface has an albedo between 0.027 and 0.051.[7][8][9]
The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.034 and a diameter of 94.63 kilometers based on an absolute magnitude of 9.41.[4][8]
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Naming
This minor planet was named from Greek mythology after the Lycian hero Sarpedon from the Iliad, who was killed by Patroclus, (617) during the Trojan War.[2] The official naming citation was published by the Minor Planet Center on 1 August 1981 (M.P.C. 6208).[14]
References
- 1 2 3 4 5 "2223 Sarpedon (1977 TL3)". Minor Planet Center. Retrieved 5 September 2017.
- 1 2 3 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2223) Sarpedon. Springer Berlin Heidelberg. p. 181. ISBN 978-3-540-00238-3. Retrieved 5 September 2017.
- 1 2 3 4 5 6 7 8 "JPL Small-Body Database Browser: 2223 Sarpedon (1977 TL3)" (2017-03-30 last obs.). Jet Propulsion Laboratory. Retrieved 5 September 2017.
- 1 2 3 4 5 6 7 "LCDB Data for (2223) Sarpedon". Asteroid Lightcurve Database (LCDB). Retrieved 5 September 2017.
- ↑ "List of Jupiter Trojans". Minor Planet Center. 30 May 2018. Retrieved 12 June 2018.
- 1 2 3 "Asteroid (2223) Sarpedon – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 5 June 2018.
- 1 2 3 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" (PDF). The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. Retrieved 9 June 2018. (online catalog)
- 1 2 3 4 5 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System – IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 15 June 2018.
- 1 2 3 4 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 15 June 2018. (online, AcuA catalog p. 153)
- 1 2 3 4 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 5 September 2017.
- 1 2 3 Hainaut, O. R.; Boehnhardt, H.; Protopapa, S. (October 2012). "Colours of minor bodies in the outer solar system. II. A statistical analysis revisited" (PDF). Astronomy and Astrophysics. 546: 20. arXiv:1209.1896. Bibcode:2012A&A...546A.115H. doi:10.1051/0004-6361/201219566. Retrieved 12 June 2018.
- 1 2 Chatelain, Joseph P.; Henry, Todd J.; French, Linda M.; Winters, Jennifer G.; Trilling, David E. (June 2016). "Photometric colors of the brightest members of the Jupiter L5 Trojan cloud". Icarus. 271: 158–169. Bibcode:2016Icar..271..158C. doi:10.1016/j.icarus.2016.01.026. Retrieved 5 September 2017.
- ↑ "Asteroid 2223 Sarpedon". Small Bodies Data Ferret. Retrieved 12 June 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 5 September 2017.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 2223 Sarpedon at AstDyS-2, Asteroids—Dynamic Site
- 2223 Sarpedon at the JPL Small-Body Database