Английская Википедия:7352 Hypsenor
Шаблон:Use dmy dates Шаблон:Infobox planet
7352 Hypsenor, provisional designation: Шаблон:Mp, is a larger Jupiter trojan from the Trojan camp, approximately Шаблон:Convert in diameter. The tumbling Jovian asteroid is a slow rotator with an exceptionally long rotation period of 648 hours. It was discovered on 4 February 1994 by Japanese astronomers Seiji Ueda and Hiroshi Kaneda at the Kushiro Observatory on Hokkaidō, Japan.[1] It was numbered in December 1996,[2] and named after the Trojan warrior Hypsenor from Greek mythology in November 2021.[3]
Classification and orbit
Hypsenor is a Jupiter trojan in a 1:1 orbital resonance with Jupiter. It is located in the trailering Trojan camp at the Gas Giant's Шаблон:L5 Lagrangian point, 60° behind its orbit Шаблон:Crossreference.[4] It is also a non-family asteroid of the Jovian background population.[5]
It orbits the Sun at a distance of 4.9–5.3 AU once every 11 years and 8 months (4,247 days; semi-major axis of 5.13 AU). Its orbit has an eccentricity of 0.04 and an inclination of 8° with respect to the ecliptic.[6] The body's observation arc begins with a precovery taken at the Palomar Observatory in August 1988, more than 5 years prior to its official discovery observation at Kushiro.[1]
Numbering and naming
This minor planet was numbered by the Minor Planet Center on 24 December 1996 (Шаблон:Small).[2] On 29 November 2021, IAU's Working Group for Small Bodies Nomenclature Шаблон:MoMP it from Greek mythology after the warrior Hypsenor, who was killed during the Trojan War by the Trojan prince Deiphobus whose Javelin throw bounced back of IdomeneusШаблон:' shield.[1][3]
Physical characteristics
In the SDSS-based taxonomy, Hypsenor is classified as an X/L-type.[7][8] This is unusual as most Jupiter trojans are D-types, with the reminder being mostly C- and P-type asteroids. It has a V–I color index of 0.85.[9]
Rotation period
In October 2013, a rotational lightcurve was obtained for this asteroid from photometric observations by American amateur astronomer Robert Stephens at the Trojan Station Шаблон:Obscode of the Center for Solar System Studies in Landers, California. It gave a well-defined, outstandingly long rotation period of Шаблон:Val hours with a brightness variation of 0.30 magnitude (Шаблон:Small).[10]Шаблон:Efn As of 2018, there are only about three dozens known slow rotators with periods longer than that of Hypsenor.
Tumbler
The astronomers also detected a non-principal axis rotation seen in distinct rotational cycles in successive order. This is commonly known as tumbling.[10] Hypsenor is the six-largest asteroid and the second-largest Jupiter trojan after 4902 Thessandrus known to be is such a state (also see list of tumblers).[9]
Diameter and albedo
According to the space-based surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Hypsenor measures 47.07 and 47.73 kilometers in diameter and its surface has an albedo of 0.207 and 0.093, respectively.[11][12] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a larger diameter of 55.67 kilometers, based on an absolute magnitude of 10.0.[9]
Шаблон:Largest Jupiter trojans
Notes
References
External links
- Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- Шаблон:AstDys
- Шаблон:JPL small body
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control
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- Английская Википедия
- Jupiter trojans (Trojan camp)
- Discoveries by Hiroshi Kaneda
- Discoveries by Seiji Ueda
- Named minor planets
- Slow rotating minor planets
- Astronomical objects discovered in 1994
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