astro.wikisort.org - Asteroid

3391 Sinon /ˈsaɪnɒn/ is a mid-sized Jupiter trojan from the Greek camp, approximately 40 kilometers (25 miles) in diameter. It was discovered on 18 February 1977, by Japanese astronomers Hiroki Kosai and Kiichirō Furukawa at the Kiso Observatory in Japan.[1] The dark Jovian asteroid has a rotation period of 8.1 hours and likely an elongated shape.[7] It was named after the hero Sinon from Greek mythology.[1]

3391 Sinon

Shape model of Sinon from its lightcurve
Discovery [1]
Discovered by	H. Kosai K. Furukawa
Discovery site	Kiso Station
Discovery date	18 February 1977
Designations
MPC designation	(3391) Sinon
Pronunciation	/ˈsaɪnɒn/[2]
Named after	Sinon (Greek mythology)[1]
Alternative designations	1977 DD3
Minor planet category	Jupiter trojan [1][3] Greek [4] · background [5]
Orbital characteristics [3]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc	63.16 yr (23,071 d)
Aphelion	5.7383 AU
Perihelion	4.8691 AU
Semi-major axis	5.3037 AU
Eccentricity	0.0819
Orbital period (sidereal)	12.21 yr (4,461 d)
Mean anomaly	200.54°
Mean motion	0° 4m 50.52s / day
Inclination	14.871°
Longitude of ascending node	341.10°
Argument of perihelion	103.13°
Jupiter MOID	0.2572 AU
TJupiter	2.9260
Physical characteristics
Mean diameter	37.86±6.82 km[6] 48.48 km (calculated)[7]
Synodic rotation period	8.135 h[8][lower-alpha 1]
Geometric albedo	0.057 (assumed)[7] 0.093±0.036[6]
Spectral type	C (assumed)[7]
Absolute magnitude (H)	10.3[1][3][6][7]

Orbit and classification

Sinon is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the leading Greek camp at the Gas Giant's L₄ Lagrangian point, 60° ahead on its orbit (see Trojans in astronomy).[4] It is also a non-family asteroid of the Jovian background population.[5] It orbits the Sun at a distance of 4.9–5.7 AU once every 12 years and 3 months (4,461 days; semi-major axis of 5.3 AU). Its orbit has an eccentricity of 0.08 and an inclination of 15° with respect to the ecliptic.[3] The body's observation arc begins with a precovery at Palomar Observatory in March 1953, almost 24 years prior to its official discovery observation at Kiso.[1]

Physical characteristics

Sinon is an assumed, carbonaceous C-type asteroid.[7]

Rotation period

In February 2013, a rotational lightcurve of Sinon was obtained from photometric observations by Lawrence Wasserman at Lowell Observatory and by Robert Stephens at the Center for Solar System Studies. Lightcurve analysis gave a well-defined rotation period of 8.135±0.002 hours with a brightness amplitude of 0.72 magnitude, indicative of a non-spherical shape (U=3).[7][8][lower-alpha 1]

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Sinon measures 37.86 kilometers in diameter and its surface has an albedo of 0.093,[6] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 48.48 kilometers based on an absolute magnitude of 10.3.[7]

Naming

This minor planet was named from Greek mythology after Sinon, a Greek warrior of the Trojan War.[1] The official naming citation was published by the Minor Planet Center on 16 December 1986 (M.P.C. 11443).[9]

Notes

References

External links

• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• Asteroid 3391 Sinon at the Small Bodies Data Ferret
• 3391 Sinon at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 3391 Sinon at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (3391) Sinon

(3391) Sinon ist ein Asteroid aus der Gruppe der Jupiter-Trojaner. Damit werden Asteroiden bezeichnet, die auf den Lagrange-Punkten auf der Bahn des Jupiter um die Sonne laufen. (3391) Sinon wurde am 18. Februar 1977 von Hiroki Kōsai und Kiichirō Furukawa entdeckt. Er ist dem Lagrangepunkt L4 zugeordnet.

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- [en] 3391 Sinon

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[es] (3391) Sinon

(3391) Sinon es un asteroide perteneciente a los asteroides troyanos de Júpiter descubierto por Hiroki Kosai y Kiichiro Hurukawa desde el Observatorio Kiso del monte Ontake, Japón, el 18 de febrero de 1977.

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[ru] (3391) Синон

(3391) Синон (др.-греч. Σίνων) — типичный троянский астероид Юпитера, движущийся в точке Лагранжа L4, в 60° впереди планеты. Астероид был открыт 18 февраля 1977 года советскими астрономами Хироки Косай и Киитиро Фурукава в обсерватории Кисо и назван в честь Синона, персонажа древнегреческой мифологии[1].

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