5130 Ilioneus
Discovery [1] | |
---|---|
Discovered by | C. Shoemaker |
Discovery site | Palomar Obs. |
Discovery date | 30 September 1989 |
Designations | |
MPC designation | (5130) Ilioneus |
Pronunciation |
/ˌaɪliːˈɒniəs/ EYE-lee-ON-ee-əs |
Named after |
Ilioneus [1] (Greek mythology) |
1989 SC7 · 1990 VE8 | |
Jupiter trojan [1][2] Trojan [3] · background [4] | |
Orbital characteristics [2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 62.45 yr (22,810 d) |
Aphelion | 5.2617 AU |
Perihelion | 5.1571 AU |
5.2094 AU | |
Eccentricity | 0.0100 |
11.89 yr (4,343 d) | |
154.90° | |
0° 4m 58.44s / day | |
Inclination | 15.739° |
242.53° | |
104.54° | |
Jupiter MOID | 0.1347 AU |
TJupiter | 2.9250 |
Physical characteristics | |
Mean diameter |
±3.94 km 52.49[5] ±5.4 km 59.40[6] ±0.98 km 60.71[7] |
±0.014 h 14.768[8] | |
±0.013 0.0602[6] ±0.013 0.069[7] ±0.012 0.077[5] | |
C (assumed)[9] B–V = ±0.060 0.940[10] V–R = ±0.040 0.390[10] V–I = ±0.030 0.960[9] | |
9.6[7] 9.7[1][2] 9.80[9][5][6] | |
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5130 Ilioneus (/ˌaɪliːˈɒniəs/ EYE-lee-ON-ee-əs), provisional designation 1989 SC7, is a dark Jupiter trojan from the Trojan camp, approximately 60 kilometers (37 miles) in diameter. It was discovered on 30 September 1989, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California.[1] The assumed C-type asteroid belongs to the 70 largest Jupiter trojans and has a rotation period of 14.8 hours.[9] It was named after Ilioneus from Greek mythology.[1]
Orbit and classification
Ilioneus is a dark Jovian asteroid orbiting in the trailering Trojan camp at Jupiter's L5 Lagrangian point, 60° behind on the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid of the Jovian background population.[4]
It orbits the Sun at a distance of 5.2–5.3 AU once every 11 years and 11 months (4,343 days; semi-major axis of 5.21 AU). Its orbit has an eccentricity of 0.01 and an inclination of 16° with respect to the ecliptic.[2] The body's observation arc begins with a precovery taken at Palomar in December 1955, almost 34 years prior to its official discovery observation.[1]
Physical characteristics
Ilioneus is an assumed C-type asteroid. Its V–I color index of 0.96 is typical for most D-type asteroids, the dominant spectral type among the Jupiter trojans.[9]
Rotation period
Photometric observations of Ilioneus were obtained by Stefano Mottola in February 1994. Lightcurve analysis gave a rotation period of ±0.014 hours with a brightness amplitude of 0.16 14.768magnitude (U=3).[9][8]
Follow-up observations by astronomers at the Palomar Transient Factory in 2013, and by Robert D. Stephens at the Center for Solar System Studies in 2015 and 2017, gave a concurring period determination with an amplitude between 0.18 and 0.34 (U=2/3/3).[9][11][12][13][lower-alpha 1]
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, Ilioneus measures between 52.49 and 60.71 kilometers in diameter and its surface has an albedo between 0.060 and 0.077.[5][6][7] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0602 and a diameter of 59.40 kilometers based on an absolute magnitude of 9.8.[9]
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Naming
This minor planet was named by the discover from Greek mythology after Ilioneus, a ship commander and official spokesman under Aeneas.[1] The official naming citation was published by the Minor Planet Center on 4 June 1993 (M.P.C. 22249).[14]
Notes
References
- 1 2 3 4 5 6 7 8 "5130 Ilioneus (1989 SC7)". Minor Planet Center. Retrieved 15 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 5130 Ilioneus (1989 SC7)" (2018-05-24 last obs.). Jet Propulsion Laboratory. Retrieved 15 June 2018.
- ↑ "List of Jupiter Trojans". Minor Planet Center. 1 June 2018. Retrieved 15 June 2018.
- 1 2 "Asteroid (Ilioneus) Ilioneus – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. 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 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". The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. Retrieved 15 June 2018. (online catalog)
- 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 15 June 2018.
- 1 2 3 4 5 6 7 8 "LCDB Data for (5130) Ilioneus". Asteroid Lightcurve Database (LCDB). Retrieved 15 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 9 June 2018.
- ↑ 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 15 June 2018.
- ↑ Stephens, Robert D.; Coley, Daniel R.; French, Linda M. (July 2016). "A Report from the L5 Trojan Camp - Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies". The Minor Planet Bulletin. 43 (3): 265–270. Bibcode:2016MPBu...43..265S. ISSN 1052-8091. Retrieved 15 June 2018.
- ↑ Stephens, Robert D. (April 2017). "Lightcurve Analysis of Trojan Asteroids at the Center for Solar System Studies 2016 October - December". The Minor Planet Bulletin. 44 (2): 123–125. Bibcode:2017MPBu...44..123S. ISSN 1052-8091. Retrieved 15 June 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 15 June 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- Asteroid 5130 Ilioneus at the Small Bodies Data Ferret
- 5130 Ilioneus at AstDyS-2, Asteroids—Dynamic Site
- 5130 Ilioneus at the JPL Small-Body Database