2730 Barks

2730 Barks, provisional designation 1981 QH, is a carbonaceous asteroid from the central regions of the asteroid belt, approximately 15 kilometers in diameter. It was discovered on 30 August 1981, by American astronomer Edward Bowell at Anderson Mesa Station, Arizona, United States.^[11] The asteroid was named after comic-book illustrator Carl Barks.^[2]

2730 Barks

Discovery[1]
Discovered by	E. Bowell
Discovery site	Anderson Mesa Stn.
Discovery date	30 August 1981
Designations
MPC designation	(2730) Barks
Named after	Carl Barks (American cartoonist)[2]
Alternative designations	1981 QH · 1935 FQ 1935 HC · 1963 SP 1972 TJ5 · 1975 EM1
Minor planet category	main-belt · (middle)
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	62.77 yr (22,925 days)
Aphelion	3.0741 AU
Perihelion	2.3683 AU
Semi-major axis	2.7212 AU
Eccentricity	0.1297
Orbital period (sidereal)	4.49 yr (1,640 days)
Mean anomaly	70.617°
Mean motion	0° 13m 10.56s / day
Inclination	6.4294°
Longitude of ascending node	4.6736°
Argument of perihelion	273.09°
Physical characteristics
Dimensions	9.87±0.82 km[3] 14.97±0.50 km[4] 15.830±0.120[5][6] 24.30 km (calculated)[7]
Synodic rotation period	6.084±0.002 h[8] 6.087±0.0016 h[9]
Geometric albedo	0.057 (assumed)[7] 0.162±0.020}[6][5] 0.196±0.015[4] 0.415±0.067[3]
Spectral type	SMASS = C[1] · C[7]
Absolute magnitude (H)	11.31±0.87[10] · 11.6[3][4][6] · 11.643±0.003 (R)[9] · 11.7[1] · 11.8[7]

Orbit and classification

Barks orbits the Sun in the central main-belt at a distance of 2.4–3.1 AU once every 4 years and 6 months (1,640 days). Its orbit has an eccentricity of 0.13 and an inclination of 6° with respect to the ecliptic.^[1]

It was first identified as 1935 FQ at Johannesburg Observatory in 1935. The body's observation arc begins with a precovery taken at Palomar Observatory in 1954, or 27 years prior to its official discovery observation at Anderson Mesa.^[11]

Physical characteristics

In the SMASS taxonomy, Barks is characterized as a carbonaceous C-type asteroid.^[1]

Rotation period

In August 2012, a rotational lightcurve of Barks was obtained from photometric observations by astronomers at the Oakley Southern Sky Observatory (E09) in Australia. Lightcurve analysis gave a well-defined rotation period of 6.084 hours with a brightness variation of 0.26 magnitude (U=3).^[8] This concurs with observations taken at the Palomar Transient Factory in January 2011, which gave a period of 6.087 hours and an amplitude of 0.28 magnitude (U=2).^[9]

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, Barks measures between 9.87 and 15.830 kilometers in diameter and its surface has an albedo between 0.162 and 0.415.^[3][4][5][6]

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 24.30 kilometers with an absolute magnitude of 11.8.^[7]

Naming

This minor planet was named for American cartoonist Carl Barks (1901–2000), best known for the fictional character Scrooge McDuck he created while working at Walt Disney in the late 1940s. In many of his stories, he described space exploration and adventure. Barks was one of the first to use the term "rubble pile asteroid".^[2]

Peter Thomas, an assistant of Cornell University, proposed the idea of naming an asteroid after Barks. The approved naming citation was published by the Minor Planet Center on 28 January 1983 (M.P.C. 7621).^[12] A week later, Thomas informed Barks by mail about his initiative.^[13]