3540 Protesilaos
| Discovery [1] | |
|---|---|
| Discovered by | F. Börngen |
| Discovery site | Karl Schwarzschild Obs. |
| Discovery date | 27 October 1973 |
| Designations | |
| MPC designation | 3540 Protesilaos |
Named after |
Protesilaus (Greek mythology)[2] |
|
1973 UF5 · 1978 GJ2 1985 VO1 | |
|
Jupiter trojan [1][3] (Greek camp) | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 62.32 yr (22,762 days) |
| Aphelion | 5.8931 AU |
| Perihelion | 4.6509 AU |
| 5.2720 AU | |
| Eccentricity | 0.1178 |
| 12.11 yr (4,421 days) | |
| 105.65° | |
| 0° 4m 53.04s / day | |
| Inclination | 23.294° |
| 26.431° | |
| 116.55° | |
| Jupiter MOID | 0.5239 AU |
| Jupiter Tisserand parameter | 2.8230 |
| Physical characteristics | |
| Dimensions |
70.22±1.08 km[4] 76.84 km (calculated)[3] 87.66±3.46 km[5] |
|
8.945 h[6] 8.95±0.02 h[7] | |
|
0.057 (assumed)[3] 0.062±0.006[5] 0.062±0.014[4] | |
| C [3] | |
|
9.00[5] 9.3[1][3] 9.38±0.38[8] 9.4[4] | |
|
| |
3540 Protesilaos, provisional designation 1973 UF5, is a carbonaceous Jupiter trojan from the Greek camp, approximately 80 kilometers in diameter. It was discovered on 27 October 1973, by German astronomer Freimut Börngen at the Karl Schwarzschild Observatory in Tautenburg, Germany.[9]
The dark C-type asteroid is orbiting in the leading Greek camp at Jupiter's L4 Lagrangian point, 60° ahead of its orbit (see Trojans in astronomy) with an eccentricity of 0.12 and an inclination of 23° with respect to the ecliptic. It orbits the Sun at a distance of 4.6–5.9 AU once every 12 years and 1 month (4,421 days).[1] The first precovery was taken at Palomar Observatory in 1953, extending the asteroid's observation arc by 20 years prior to its discovery.[9]
Two rotational light-curves were obtained by astronomer Stefano Mottola at the DLR Institute for Planetary Research (1989), and by Linda French using the Cerro Tololo Inter-American Observatory in Chile (2010). The first light-curve gave a rotation period of 8.945 hours with a brightness amplitude of 0.13 in magnitude (U=2).[6] The second light-curve showed a nearly identical period of 8.95±0.02 hours with no brightness variation given (U=2).[7]
According to the surveys carried out by the Japanese Akari satellite, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, the Trojan asteroid has a concurring albedo of 0.062, but measures 87.7 and 70.2 kilometers in diameter, respectively.[5][4] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057, and calculates a diameter of 76.8 kilometers.[3]
The minor planet is named after the hero Protesilaus from Greek mythology. In the Trojan War, he was the first Greek to set foot on the shores of Troy. He was later killed by the Trojan Aeneas, after whom one of the largest Jupiter trojans, 1172 Äneas, is named.[2] Another Jupiter trojan, 13062 Podarkes, is named after his brother Podarkes. Naming citation was published on 14 April 1987 (M.P.C. 11751).[10]
References
- 1 2 3 4 5 "JPL Small-Body Database Browser: 3540 Protesilaos (1973 UF5)" (2015-06-11 last obs.). Jet Propulsion Laboratory. Retrieved 11 April 2016.
- 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (3540) Protesilaos. Springer Berlin Heidelberg. p. 297. ISBN 978-3-540-00238-3. Retrieved 6 April 2016.
- 1 2 3 4 5 6 "LCDB Data for (3540) Protesilaos". Asteroid Lightcurve Database (LCDB). Retrieved 6 April 2016.
- 1 2 3 4 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407
. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 19 May 2016. - 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 6 April 2016.
- 1 2 Mottola, S.; Gonano, M.; Rebhan, H.; Neukum, G. (December 1989). "CCD Photometry of a Trojan Asteroid". Asteroids: 151. Bibcode:1990acm..proc..151M. Retrieved 6 April 2016.
- 1 2 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 6 April 2016.
- ↑ 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:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 19 May 2016.
- 1 2 "3540 Protesilaos (1973 UF5)". Minor Planet Center. Retrieved 6 April 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 19 May 2016.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 3540 Protesilaos at the JPL Small-Body Database
