4086 Podalirius
Discovery [1] | |
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Discovered by | L. V. Zhuravleva |
Discovery site | Crimean Astrophysical Obs. |
Discovery date | 9 November 1985 |
Designations | |
MPC designation | (4086) Podalirius |
Pronunciation |
/ˌpoʊdəˈlaɪriəs/ POH-də-LY-ree-əs |
Named after |
Podalirius [1] (Greek mythology) |
1985 VK2 · 1951 XE1 | |
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 | 62.02 yr (22,651 d) |
Aphelion | 5.8930 AU |
Perihelion | 4.6258 AU |
5.2594 AU | |
Eccentricity | 0.1205 |
12.06 yr (4,406 d) | |
254.54° | |
0° 4m 54.12s / day | |
Inclination | 21.697° |
54.962° | |
356.77° | |
Jupiter MOID | 0.3803 AU |
TJupiter | 2.8440 |
Physical characteristics | |
Mean diameter |
±0.41 km 85.49[6] ±2.73 km 85.98[7] ±9.4 km 86.89[8] |
±0.04 h 10.43[9] ±0.0257 h 10.436[10] ±0.01 h 14.51[11] | |
±0.007 0.050[6] ±0.014 0.0536[8] ±0.004 0.056[7] | |
C (assume)[3] V–I = ±0.056 0.870[3] | |
±0.002 8.886(R)[10] ±0.43 9.09[12] 9.10[1][2][3][7][8] 9.2[6] | |
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4086 Podalirius ( /ˌpoʊdəˈlaɪriəs/ POH-də-LY-ree-əs), provisional designation 1985 VK2, is a large Jupiter trojan from the Greek camp, approximately 86 kilometers (53 miles) in diameter. It was discovered on 9 November 1985, by Soviet astronomer Lyudmila Zhuravleva at the Crimean Astrophysical Observatory in Nauchnij, on the Crimean peninsula.[1] The assumed C-type asteroid belongs to the 40 largest Jupiter trojans and has a rotation period of 10.43 hours.[3] It was named after the legendary healer Podalirius from Greek mythology.[1]
Orbit and classification
Podalirius 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][13] It orbits the Sun at a distance of 4.6–5.9 AU once every 12 years and 1 month (4,406 days; semi-major axis of 5.26 AU). Its orbit has an eccentricity of 0.12 and an inclination of 22° with respect to the ecliptic.[2]
The body's observation arc begins with its first observation as 1951 XE1 at McDonald Observatory in December 1951, nearly 34 years prior to its official discovery observation at Nauchnij.[1]
Physical characteristics
Podalirius is an assumed C-type asteroid, the most common spectral type among Jupiter trojans after the D-types.[3]
Rotation period
In May 1991, a rotational lightcurve of Podalirius was obtained by Stefano Mottola and Maria Gonano–Beurer using the ESO 1-metre telescope at La Silla Observatory in northern Chile. Lightcurve analysis gave a typical rotation period of 10.43 hours with a brightness variation of 0.13 magnitude (U=2+).[3][9]
In November 2008, photometric follow-up observations by Robert Stephens at his Goat Mountain Astronomical Research Station (G79) gave a divergent period of 14.51 hours and a low amplitude of 0.08 (U=2),[11] while in March 2013, Mottola's original result was confirmed by astronomers at the Palomar Transient Factory, California, measuring a period 10.436 hours and a brightness variation of 0.16 magnitude in the R-band (U=2).[3][10]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Podalirius measures between 85.49 and 86.89 kilometers in diameter and its surface has an albedo between 0.050 and 0.056.[6][7][8] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0536 and a diameter of 86.89 kilometers based on an absolute magnitude of 9.1.[3]
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Naming
This minor planet was named from Greek mythology after the legendary healer Podalirius, who stopped a pestilence during the Trojan War as mentioned in Homer's Iliad. Podalirius is the son of Asclepius and Epione and brother of Hygieia, Machaon (who was also a physician) and Panacea.[1]
The official naming citation was published by the Minor Planet Center on 4 June 1993 (M.P.C. 22246).[14]
References
- 1 2 3 4 5 6 7 8 "4086 Podalirius (1985 VK2)". Minor Planet Center. Retrieved 12 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 4086 Podalirius (1985 VK2)" (2018-05-19 last obs.). Jet Propulsion Laboratory. Retrieved 12 June 2018.
- 1 2 3 4 5 6 7 8 9 "LCDB Data for (4086) Podalirius". Asteroid Lightcurve Database (LCDB). Retrieved 12 June 2018.
- ↑ "List of Jupiter Trojans". Minor Planet Center. 30 May 2018. Retrieved 12 June 2018.
- 1 2 3 "Asteroid (4086) Podalirius – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 12 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 12 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 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 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 12 June 2018.
- 1 2 3 Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry" (PDF). The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 12 June 2018.
- 1 2 Stephens, Robert D. (April 2009). "Asteroids Observed from GMARS and Santana Observatories". The Minor Planet Bulletin. 36 (2): 59–62. Bibcode:2009MPBu...36...59S. ISSN 1052-8091. Retrieved 12 June 2018.
- ↑ 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 12 June 2018.
- ↑ "Asteroid 4086 Podalirius". Small Bodies Data Ferret. Retrieved 12 June 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 12 June 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- (4086) Podalirius, Dictionary of Minor Planet Names
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 4086 Podalirius at AstDyS-2, Asteroids—Dynamic Site
- 4086 Podalirius at the JPL Small-Body Database