2747 Český Krumlov

2747 Cesky Krumlov

Orbital diagram of Český Krumlov
Discovery [1]
Discovered by	A. Mrkos
Discovery site	Kleť Obs.
Discovery date	19 February 1980
Designations
MPC designation	(2747) Cesky Krumlov
Pronunciation	Czech: [ˈtʃɛskiː ˈkrʊmlof]
Named after	Český Krumlov (Czech town)[2]
Alternative designations	1980 DW · 1953 FO1 1975 EK5 · 1977 SV2 1977 TM3 · 1977 TS7 1982 OM
Minor planet category	main-belt · (outer)[3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc	63.93 yr (23,351 days)
|{{{apsis}}}|helion}}	3.4959 AU
|{{{apsis}}}|helion}}	2.6996 AU
Semi-major axis	3.0978 AU
Eccentricity	0.1285
Orbital period	5.45 yr (1,991 days)
Mean anomaly	183.40°
Mean motion	0° 10m 50.88s / day
Inclination	5.8182°
Longitude of ascending node	344.88°
|{{{apsis}}}|helion}}	302.03°
Physical characteristics
Dimensions	20.62 km (calculated)[3] 22.51±6.03 km[4] 22.57±7.52 km[5] 28.39±0.98 km[6] 29.804±0.174 km[7] 32.103±0.239 km[8] 32.63 km[9] 36.33±0.66 km[10]
Rotation period	438.7098±9.1557 h[11]
Geometric albedo	0.028±0.004[7][10] 0.0380±0.004[9] 0.0393±0.0040[8] 0.05±0.08[4] 0.051±0.004[6] 0.057 (assumed)[3] 0.06±0.07[5]
Spectral type	X [12] · C [3]
Absolute magnitude (H)	11.6[6][8] · 11.70[5][10] · 11.706±0.003 (R)[11] · 11.8[1] · 11.97±0.27[12] · 12.16[3]

2747 Český Krumlov (Czech: [ˈtʃɛskiː ˈkrumlof]), provisional designation 1980 DW, is a carbonaceous asteroid and slow rotator from the outer regions of the asteroid belt, approximately 22 kilometers in diameter. It was discovered by Czech astronomer Antonín Mrkos at Kleť Observatory on 19 February 1980, and named for the Czech town of Český Krumlov.^[2][13]

Orbit and classification

Český Krumlov belongs to the Hygiea family.^{[citation needed]} It orbits the Sun in the outer main-belt at a distance of 2.7–3.5 AU once every 5 years and 5 months (1,991 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 1953 FO₁ at Almaty Observatory (210) in 1953. The body's observation arc begins four weeks later with a precovery taken at Palomar Observatory, 27 years prior to its official discovery observation at Klet Observatory.^[13]

Physical characteristics

Český Krumlov has been characterized as an X-type and carbonaceous C-type asteroid.^[3][12]

Slow rotator

In October 2010, a rotational lightcurve of Český Krumlov was obtained from photometric observations by astronomers at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 438.7098 hours with a brightness variation of 0.63 magnitude ({{{1}}}).^[11] This makes it a very slow rotator.

Diameter and albedo

According to the 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, Český Krumlov measures between 22.51 and 36.33 kilometers in diameter and its surface has an albedo between 0.028 and 0.06.^{[4][5][6][7][8][9][10]}

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 20.62 kilometers with an absolute magnitude of 12.16.^[3]

Naming

This minor planet was named after the historic Czech town of Český Krumlov, near to the location of the discovering Kleť Observatory.^[2] The approved naming citation was published by the Minor Planet Center on 29 November 1993 (M.P.C. 22828).^[14]

References

External links

• Asteroid Lightcurve Database (LCDB), query form (info )
• 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
• 2747 Český Krumlov at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 2747 Český Krumlov at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

0.00 (0 votes) Original source: https://en.wikipedia.org/wiki/2747 Český Krumlov. Read more