2043 Ortutay

2043 Ortutay, provisional designation 1936 TH, is a dark asteroid from the outer regions of the asteroid belt, approximately 45 kilometers in diameter. The asteroid was discovered by Hungarian astronomer György Kulin at the Konkoly Observatory, Budapest, on 12 November 1936.^[11] It was named after Hungarian ethnographer Gyula Ortutay.^[2]

2043 Ortutay

Discovery[1]
Discovered by	G. Kulin
Discovery site	Konkoly Obs.
Discovery date	12 November 1936
Designations
MPC designation	(2043) Ortutay
Named after	Gyula Ortutay (Hungarian ethnographer)[2]
Alternative designations	1936 TH · 1935 PE 1947 TD · 1947 VA 1951 LQ · 1952 QG 1958 UN · 1958 XR 1963 SN · 1969 UY 1971 DB · 1972 HS1 1974 SW1 · 1975 XT5 A908 QB
Minor planet category	main-belt · (outer)[3]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	108.61 yr (39,668 days)
Aphelion	3.4510 AU
Perihelion	2.7602 AU
Semi-major axis	3.1056 AU
Eccentricity	0.1112
Orbital period (sidereal)	5.47 yr (1,999 days)
Mean anomaly	282.90°
Mean motion	0° 10m 48.36s / day
Inclination	3.0745°
Longitude of ascending node	321.21°
Argument of perihelion	60.334°
Physical characteristics
Dimensions	42.13±15.15 km[4] 44.14±15.49 km[5] 44.69 km (derived)[3] 48.460±0.215 km[6] 49.32±0.90 km[7] 54.117±0.677 km[8]
Synodic rotation period	7.7475±0.0005 h[9]
Geometric albedo	0.0317±0.0122[8] 0.036±0.002[7] 0.040±0.009[6] 0.0423 (derived)[3] 0.05±0.02[5] 0.05±0.05[4]
Spectral type	X[10] · C[3]
Absolute magnitude (H)	10.64±0.35[10] · 10.7[5][8] · 10.8[1][3][7] · 10.93[4]

Classification and orbit

Ortutay orbits the Sun in the outer main-belt at a distance of 2.8–3.5 AU once every 5 years and 6 months (1,999 days). Its orbit has an eccentricity of 0.11 and an inclination of 3° with respect to the ecliptic.^[1]

The asteroid was first identified as A908 QB at Heidelberg Observatory in August 1908, extending the body's observation arc by 28 years prior to its official discovery observation at Konkoly.^[11]

Physical characteristics

Ortutay has been characterized as an X-type asteroid by Pan-STARRS photometric survey.^[10] The body's low albedo suggest that it is a carbonaceous C-type asteroid.^[3]

Rotation period

In December 2013, a rotational lightcurve of Ortutay was obtained from photometric observations by astronomer Kim Lang at the Klokkerholm Observatory in Denmark. Lightcurve analysis gave a rotation period of 7.7475 hours with a brightness variation of 0.44 magnitude (U=3-).^[9]

Diameter and albedo

According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Ortutay measures between 42.13 and 54.117 kilometers in diameter and its surface has an albedo between 0.0317 and 0.05.^{[4][5][6][7][8]}

The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0423 and a diameter of 44.69 kilometers based on an absolute magnitude of 10.8.^[3]

Naming

This minor planet was named in memory of Hungarian Gyula Ortutay (1910–1978), a professor of ethnography and Hungarian politician, who fostered the popularization of astronomy.^[2] In the late 1940s, he was Hungary's Minister of Religion and Education. The approved naming citation was published by the Minor Planet Center on 1 February 1980 (M.P.C. 5183).^[12]