3564 Talthybius
Discovery [1] | |
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Discovered by | E. Bowell |
Discovery site | Anderson Mesa Stn. |
Discovery date | 15 October 1985 |
Designations | |
MPC designation | (3564) Talthybius |
Pronunciation |
/tælˈθɪbiəs/ tal-THIB-ee-əs |
Named after |
Talthybius [1] (Greek mythology) |
1985 TC1 · 1979 HW2 1979 HY1 · 1980 JU | |
Jupiter trojan [1][2][3] Greek [4][5] · background [5] | |
Orbital characteristics [2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 67.46 yr (24,639 d) |
Aphelion | 5.4098 AU |
Perihelion | 4.9952 AU |
5.2025 AU | |
Eccentricity | 0.0398 |
11.87 yr (4,334 d) | |
50.621° | |
0° 4m 59.16s / day | |
Inclination | 15.507° |
23.776° | |
204.40° | |
Jupiter MOID | 0.4228 AU |
TJupiter | 2.9260 |
Physical characteristics | |
Mean diameter |
km 68.53(derived)[3] ±3.5 km 68.92[6] ±0.58 km 73.73[7] ±2.65 km 74.11[8] |
±0.03 h 40.40[9][lower-alpha 1] ±0.02 h 40.44[10] ±0.13 h 40.59[11] | |
±0.016 0.062[7] 0.0654(derived)[3] ±0.006 0.081[8] ±0.010 0.0934[6] | |
D (Pan-STARRS)[12] D (SDSS-MOC)[13] C (assumed)[3] | |
9.00[6][8] 9.3[7] 9.4[1][2][3] ±0.50 9.45[12] | |
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3564 Talthybius (/tælˈθɪbiəs/ tal-THIB-ee-əs), provisional designation 1985 TC1, is a large Jupiter trojan from the Greek camp, approximately 73 kilometers (45 miles) in diameter. It was discovered on 15 October 1985, by American astronomer Edward Bowell at the Anderson Mesa Station near Flagstaff, Arizona, in the United States.[1] The dark D-type asteroid belongs to the 50 largest Jupiter trojans and has a relatively long rotation period of 40.59 hours.[3] It was named after the Greek hero Talthybius, who was a herald during the Trojan War.[1]
Orbit and classification
Talthybius is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's L4 Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population.[5][14]
It orbits the Sun at a distance of 5.0–5.4 AU once every 11 years and 10 months (4,334 days; semi-major axis of 5.2 AU). Its orbit has an eccentricity of 0.04 and an inclination of 16° with respect to the ecliptic.[2] The body's observation arc begins with a precovery at Palomar Observatory in December 1950, almost 35 years prior to its official discovery observation at Anderson Mesa.[1]
Physical characteristics
In the SDSS-based taxonomy, Talthybius is dark D-type asteroid.[13] Pan-STARRS's survey also characterized it as a D-type, while the Collaborative Asteroid Lightcurve Link (CALL) assumed it to be of a carbonaceous C-type composition.[3][12]
Rotation period
In June 1994, a rotational lightcurve of Talthybius was obtained by Stefano Mottola and Anders Erikson using the Bochum 0.61-metre Telescope at La Silla Observatory in Chile. Lightcurve analysis gave a rotation period of 40.59 hours with a brightness variation of 0.38 magnitude (U=3-).[3][11]
Photometric observations by Robert Stephen at the Goat Mountain Astronomical Research Station (G79) in November 2009 and at the Center for Solar System Studies in February 2015, gave two concurring periods of 40.40 and 40.44 hours with a corresponding amplitude of 0.31 and 0.38 (U=3-/2+).[3][9][10][lower-alpha 1]
While not being a slow rotator, Talthybius'es period is significantly longer than that of most larger Jupiter trojans, which have a spin rate of typically 10 hours.
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, Talthybius measures between 68.92 and 74.11 kilometers in diameter and its surface has an albedo between 0.062 and 0.093.[6][7][8] CALL derives an albedo of 0.0654 and a diameter of 68.53 kilometers based on an absolute magnitude of 9.4.[3]
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Naming
This minor planet was named after the Greek hero Talthybius from Greek mythology, who was the chief herald during the Trojan War.[1] The official naming citation was published by the Minor Planet Center on 5 November 1987 (M.P.C. 12459).[15]
Notes
- 1 2 Lightcurve plot of (3564) Talthybius, taken by Daniel Coley / Robert Stephens at CS3 in February 2015. Quality code is 3 (at the CS3 website). Summary figures for at the LCDB and CS3.
References
- 1 2 3 4 5 6 7 8 "3564 Talthybius (1985 TC1)". Minor Planet Center. Retrieved 10 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 3564 Talthybius (1985 TC1)" (2018-05-25 last obs.). Jet Propulsion Laboratory. Retrieved 10 June 2018.
- 1 2 3 4 5 6 7 8 9 10 "LCDB Data for (3564) Talthybius". Asteroid Lightcurve Database (LCDB). Retrieved 10 June 2018.
- ↑ "List of Jupiter Trojans". Minor Planet Center. 30 May 2018. Retrieved 10 June 2018.
- 1 2 3 "Asteroid (3564) Talthybius – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 5 June 2018.
- 1 2 3 4 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 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 10 June 2018. (online catalog)
- 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 Stephens, Robert D.; Coley, Daniel, R.; French, Linda M. (January 2016). "Large L5 Jovian Trojan Asteroid Lightcurves from the Center for Solar System Studies". The Minor Planet Bulletin. 43 (1): 15–22. Bibcode:2016MPBu...43...15S. ISSN 1052-8091. Retrieved 10 June 2018.
- 1 2 Stephens, Robert D. (April 2010). "Trojan Asteroids Observed from GMARS and Santana Observatories: 2009 October - December". The Minor Planet Bulletin. 37 (2): 47–48. Bibcode:2010MPBu...37...47S. ISSN 1052-8091. Retrieved 10 June 2018.
- 1 2 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 10 June 2018.
- 1 2 3 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" (PDF). Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 10 June 2018.
- 1 2 Carvano, J. M.; Hasselmann, P. H.; Lazzaro, D.; Mothé-Diniz, T. (February 2010). "SDSS-based taxonomic classification and orbital distribution of main belt asteroids". Astronomy and Astrophysics. 510: 12. Bibcode:2010A&A...510A..43C. doi:10.1051/0004-6361/200913322. Retrieved 15 June 2018.
- ↑ "Asteroid 3564 Talthybius". Small Bodies Data Ferret. Retrieved 10 June 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 10 June 2018.
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
- 3564 Talthybius at AstDyS-2, Asteroids—Dynamic Site
- 3564 Talthybius at the JPL Small-Body Database