astro.wikisort.org - Asteroid

4082 Swann, provisional designation 1984 SW₃, is a carbonaceous asteroid from the inner regions of the asteroid belt, approximately 10 kilometers in diameter.

4082 Swann

Discovery [1]
Discovered by	C. Shoemaker
Discovery site	Palomar Obs.
Discovery date	27 September 1984
Designations
MPC designation	(4082) Swann
Named after	Gordon Swann (American geologist)[2]
Alternative designations	1984 SW3 · 1947 UF 1969 PE
Minor planet category	main-belt · (inner) [3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	69.54 yr (25,399 days)
Aphelion	3.0076 AU
Perihelion	1.7721 AU
Semi-major axis	2.3899 AU
Eccentricity	0.2585
Orbital period (sidereal)	3.69 yr (1,349 days)
Mean anomaly	317.29°
Mean motion	0° 16m 0.48s / day
Inclination	9.5978°
Longitude of ascending node	294.36°
Argument of perihelion	100.28°
Physical characteristics
Dimensions	5.85 km (derived)[3] 9.535±0.066 km[4] 11.06±0.29 km[5]
Synodic rotation period	4.03632±0.00009 h[lower-alpha 1] 4.1±0.1 h[6]
Geometric albedo	0.029±0.012[4] 0.101±0.006[5] 0.20 (assumed)[3]
Spectral type	SMASS = Ch [1] · C [3]
Absolute magnitude (H)	12.90[5] · 13.08±0.2 (R)[lower-alpha 1] · 13.4[1] · 13.46±0.206[3][7] · 13.58±0.27[8] · 14.55[4]

The asteroid was discovered on 27 September 1984, by American astronomer Carolyn Shoemaker at Palomar Observatory in California, United States, and later named for American geologist Gordon Swann.[2][9]

Orbit and classification

Swann orbits the Sun in the inner main-belt at a distance of 1.8–3.0 AU once every 3 years and 8 months (1,349 days). Its orbit has an eccentricity of 0.26 and an inclination of 10° with respect to the ecliptic.[1] First identified as 1947UF at the Finnish Turku Observatory in 1947, Swann's observation arc was extended by 37 years prior to its official discovery observation at Palomar.[9]

Physical characteristics

The C-type asteroid is classified as a Ch-subtype in the SMASS taxonomy.[1]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Swann measures 9.5 and 11.1 kilometers in diameter and its surface has an albedo of 0.029 and 0.101, respectively.[4][5] The Collaborative Asteroid Lightcurve Link, however, assumes a standard albedo for stony asteroids of 0.20 and derives a much smaller diameter of 5.85 kilometers, based on an absolute magnitude of 13.46.[3]

Rotation period

In July 2006, a rotational lightcurve of Swann was obtained from photometric observations by Petr Pravec at the Ondřejov Observatory in the Czech Republic. It gave a rotation period of 4.03632±0.00009 hours with a brightness variation of 0.67 magnitude (U=3).[lower-alpha 1] A second lightcurve obtained by Jean-Gabriel Bosch in September 2006, gave a period of 4.1±0.1 hours and an amplitude of 0.35 magnitude (U=2).[6]

Naming

This minor planet was named after American geologist Gordon A. Swann (born 1931). He served as the principal investigator of the "Apollo Lunar Geologic Experiment" conducted at the lunar landing sites of Apollo 14 and Apollo 15.[2] The official naming citation was published by the Minor Planet Center on 12 December 1989 (M.P.C. 15576).[10]

Notes

References

External links

• Gordon Swann, Astrogeology Science Center, USGS
• Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 4082 Swann at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 4082 Swann at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

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[de] (4082) Swann

(4082) Swann ist ein Hauptgürtelasteroid, der am 27. September 1984 von Carolyn Shoemaker vom Palomar-Observatorium aus entdeckt wurde.

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- [en] 4082 Swann

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