2747 Český Krumlov

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]

2747 Cesky Krumlov
Orbital diagram of Český Krumlov
Discovery [1]
Discovered byA. Mrkos
Discovery siteKleť Obs.
Discovery date19 February 1980
Designations
(2747) Cesky Krumlov
PronunciationCzech: [ˈtʃɛskiː ˈkrʊmlof]
Named after
Český Krumlov
(Czech town)[2]
1980 DW · 1953 FO1
1975 EK5 · 1977 SV2
1977 TM3 · 1977 TS7
1982 OM
main-belt · (outer)[3]
Orbital characteristics [1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc63.93 yr (23,351 days)
Aphelion3.4959 AU
Perihelion2.6996 AU
3.0978 AU
Eccentricity0.1285
5.45 yr (1,991 days)
183.40°
0° 10m 50.88s / day
Inclination5.8182°
344.88°
302.03°
Physical characteristics
Dimensions20.62 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]
438.7098±9.1557 h[11]
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]
X [12] · C [3]
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]

    Orbit and classification

    Český Krumlov belongs to the Hygiea family. 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 (U=2).[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
    1. "JPL Small-Body Database Browser: 2747 Cesky Krumlov (1980 DW)" (2017-03-21 last obs.). Jet Propulsion Laboratory. Retrieved 18 June 2017.
    2. Schmadel, Lutz D. (2007). "(2747) Český Krumlov". Dictionary of Minor Planet Names – (2747) Český Krumlov. Springer Berlin Heidelberg. p. 225. doi:10.1007/978-3-540-29925-7_2748. ISBN 978-3-540-00238-3.
    3. "LCDB Data for (2747) Český Krumlov". Asteroid Lightcurve Database (LCDB). Retrieved 18 June 2017.
    4. Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T.; et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal. 152 (3): 12. arXiv:1606.08923. Bibcode:2016AJ....152...63N. doi:10.3847/0004-6256/152/3/63. Retrieved 18 June 2017.
    5. Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T.; et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal. 814 (2): 13. arXiv:1509.02522. Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. Retrieved 18 June 2017.
    6. Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
    7. Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 18 June 2017.
    8. Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal. 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90.
    9. Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
    10. Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 18 June 2017.
    11. Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 18 June 2017.
    12. Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 18 June 2017.
    13. "2747 Cesky Krumlov (1980 DW)". Minor Planet Center. Retrieved 18 June 2017.
    14. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 18 June 2017.

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