2661 Bydžovský

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2661 Bydžovský
Discovery [1]
Discovered byZ. Vávrová
Discovery siteKleť Obs.
Discovery date23 March 1982
MPC designation(2661) Bydžovský
Named after
Bohumil Bydžovský
(Czech academician)[2]
1982 FC1 · 1950 EE
1969 TG4 · 1971 DO
1974 SU2 · 1979 RM1
main-belt · (outer)
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc66.89 yr (24,432 days)
Aphelion3.3104 AU
Perihelion2.7421 AU
3.0262 AU
5.26 yr (1,923 days)
0° 11m 13.92s / day
Physical characteristics
Dimensions22±9 km (calculated)[3]
30±2 km (est. at 0.06)[3]

2661 Bydžovský, provisional designation 1982 FC1, is an asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 23 March 1982, by Czech astronomer Zdeňka Vávrová at the South Bohemian Kleť Observatory in the Czech Republic.[4] The asteroid was named after mathematician Bohumil Bydžovský.[2]

Orbit and classification[edit]

Bydžovský orbits the Sun in the outer main-belt at a distance of 2.7–3.3 AU once every 5 years and 3 months (1,923 days). Its orbit has an eccentricity of 0.09 and an inclination of 10° with respect to the ecliptic.[1] It was first identified as 1950 EE at Heidelberg Observatory in 1950, extending the body's observation arc by 32 years prior to its discovery.[4]

Physical characteristics[edit]

As of 2016, Bydžovský's size, albedo, composition and rotation period remain unknown. Based on its absolute magnitude of 11.4, its diameter is estimated to measure between 13 and 32 kilometers, assuming an albedo in the range of 0.05 to 0.25.[3] Since most asteroids in the outer main-belt are of a carbonaceous rather than of a silicaceous composition, with low albedos, typically closer to 0.05 than to 0.25, the asteroid's diameter might be on the upper end of NASA's published conversion table, as the lower the reflectivity (albedo), the larger the body's diameter for a given absolute magnitude.[3]


This minor planet was named in honour of mathematician Bohumil Bydžovský (1880–1969), chancellor of the Charles University in Prague. He was born in southern Bohemia and became the most eminent citizen of the Czech town Veselí on the Lužnice river, after which the minor planets 2321 Lužnice and 2599 Veselí were named, respectively.[2][5][6] The official naming citation was published by the Minor Planet Center on 6 February 1993 (M.P.C. 21607).[7]


  1. ^ a b c d "JPL Small-Body Database Browser: 2661 Bydzovsky (1982 FC1)" (2017-01-27 last obs.). Jet Propulsion Laboratory. Retrieved 14 June 2017.
  2. ^ a b c Schmadel, Lutz D. (2007). "(2661) Bydžovský". Dictionary of Minor Planet Names – (2661) Bydžovský. Springer Berlin Heidelberg. p. 218. doi:10.1007/978-3-540-29925-7_2662. ISBN 978-3-540-00238-3.
  3. ^ a b c d "Absolute Magnitude (H)". NASA/JPL. Retrieved 2014-06-24.
  4. ^ a b "2661 Bydzovsky (1982 FC1)". Minor Planet Center. Retrieved 6 December 2016.
  5. ^ Schmadel, Lutz D. (2007). "(2599) Veselí". Dictionary of Minor Planet Names – (2599) Veselí. Springer Berlin Heidelberg. p. 212. doi:10.1007/978-3-540-29925-7_2600. ISBN 978-3-540-00238-3.
  6. ^ Schmadel, Lutz D. (2007). "(2321) Lužnice". Dictionary of Minor Planet Names – (2321) Lužnice. Springer Berlin Heidelberg. p. 189. doi:10.1007/978-3-540-29925-7_2322. ISBN 978-3-540-00238-3.
  7. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 6 December 2016.

External links[edit]