2865 Laurel, provisional designation 1935 OK, is a stony Marian asteroid from the middle region of the asteroid belt, approximately 15 kilometers in diameter. It was discovered by English-born South African astronomer Cyril Jackson at Johannesburg Observatory on 31 July 1935.[9] The asteroid was named after movie comedian Stan Laurel.[2]

2865 Laurel

2865 Laurel orbit, and his position on 06 Jun 2011 (NASA Orbit Viewer applet)
Discovery [1]
Discovered by	C. Jackson
Discovery site	Johannesburg Obs.
Discovery date	31 July 1935
Designations
MPC designation	(2865) Laurel
Named after	Stan Laurel (film comedian)[2]
Alternative designations	1935 OK · 1939 PA 1947 NF · 1951 ML 1972 QH
Minor planet category	main-belt · (middle) [3] Maria
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	81.62 yr (29,810 days)
Aphelion	2.7406 AU
Perihelion	2.3812 AU
Semi-major axis	2.5609 AU
Eccentricity	0.0702
Orbital period (sidereal)	4.10 yr (1,497 days)
Mean anomaly	71.330°
Mean motion	0° 14m 25.8s / day
Inclination	14.294°
Longitude of ascending node	321.79°
Argument of perihelion	293.35°
Physical characteristics
Dimensions	14.73±1.2 km (IRAS:3)[4] 14.79 km (derived)[3] 18.83±0.73 km[5] 24.99±0.37 km[6]
Synodic rotation period	21.5±0.3 h[7]
Geometric albedo	0.094±0.014[6] 0.142±0.013[5] 0.2242±0.043 (IRAS:3)[4] 0.2438 (derived)[3]
Spectral type	S [3][8]
Absolute magnitude (H)	11.20[6] · 11.24±0.30[8] · 11.3[1][3] · 11.40[4][5]

Orbit and classification

Laurel orbits the Sun in the central main-belt at a distance of 2.4–2.7 AU once every 4 years and 1 month (1,497 days). Its orbit has an eccentricity of 0.07 and an inclination of 14° with respect to the ecliptic.[1] No precoveries were taken and the asteroid's observation arc begins with its discovery observation in 1935.[9]

Physical characteristics

Laurel has been characterized as a common S-type asteroid by PanSTARRS' photometric survey.[8]

Rotation period

A rotational lightcurve for this asteroid was obtained from photometric observations by French amateur astronomer Pierre Antonini in September 2005. It gave a longer than average rotation period of 21.5±0.3 hours with a brightness variation of 0.15 in magnitude (U=2).[7]

Diameter and albedo

According to the space-based surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures between 14.7 and 25.0 kilometers in diameter and its surface has an albedo between 0.09 and 0.22.[4][5][6] The Collaborative Asteroid Lightcurve Link agrees with IRAS and derives an albedo of 0.24 and a diameter 14.8 kilometers.[3]

Naming

This minor planet was named after English-born slapstick film comedian Stan Laurel (1890–1965). Together with Oliver Hardy (1892–1957), who was honored with the main-belt asteroid 2866 Hardy, they formed the first great comedy duo in Classical Hollywood cinema.[2] The official naming citation was published by the Minor Planet Center on 1 September 1993 (M.P.C. 22496),[10] based on a suggestion by Gareth V. Williams and others.[2]

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
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• 2865 Laurel at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2865 Laurel at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

На других языках

[de] (2865) Laurel

[ru] (2865) Лорел