Английская Википедия:45P/Honda–Mrkos–Pajdušáková
Шаблон:Short description Шаблон:Infobox comet
45P/Honda–Mrkos–Pajdušáková is a short-period comet discovered by Minoru Honda December 3, 1948.[1] It is named after Minoru Honda, Antonín Mrkos, and Ľudmila Pajdušáková. The object revolves around the Sun on an elliptical orbit with a period of 5.25 years.[2] The nucleus is 1.3 kilometers in diameter.[3] On August 19 and 20, 2011, it became the fifteenth comet detected by ground radar telescope.[4]
During the 1995 perihelion passage, the comet was visible to Solar and Heliospheric Observatory (SOHO) on January 16, 1996, when the comet was around apparent magnitude 7 and 4.3° from the Sun.[1]
It is green because it emits diatomic carbon which glows green in the near vacuum of space.[5]
2011 passage
During the 2011 perihelion passage, the comet was recovered on 5 June at magnitude 21.[6] On 8 July, the comet had a magnitude of approximately 18,[7] and, as of 22 July, nuclear condensation was noticed around magnitude 16.[8] It was expected to reach a peak magnitude of around 7.3 in late September near perihelion.[9]
On August 15, 2011, the comet made a close approach of only Шаблон:Convert from the Earth[10][11][12] and it was studied by the Goldstone Deep Space Network.[13] Radar observations on August 19 and 20 detected echoes from the nucleus and coma.[4]
2017 passage
45P/Honda–Mrkos–Pajdušáková came to perihelion on December 31, 2016.[2] By February 4, 2017, it was around magnitude 7 and the coma was about 100,000 km across.[14] The comet required binoculars to be seen because of the low surface brightness.[15] The comet passed Шаблон:Convert from Earth on February 11, 2017, which was the same day as a lunar eclipse.[11][16]
Файл:Comet 45P.png |
This shows the path of the comet during January through March 2017, with daily motion drawn as spheres, scaled for relative distance from earth. |
The next notable close approach will be in October 2032[11] when the comet might brighten to magnitude 7.
August Delta Capricornids
On 16 August 2022 the global CAMS and Sonotaco network detected a modest outburst of meteors with an orbit that resembled comet 45P.[17] The shower received the temporary designation of M2022-Q1, and was later permanently named the August Delta Capricornids.[18] The meteors had an entry speed of 24.4 km/s and originated from the border of Aquarius and Capricornus with R.A. 21:40 and a declination of –11.9°.[17] This was the first time an encounter with a dust trail of 45P has been confirmed and it came from the 1980 meteoroid stream of 45P.[18] In all, 137 meteors were triangulated by the global CAMS networks.
References
External links
- Arecibo Observatory captures revealing images of Comet 45P/Honda-Mrkos-Pajdusakova
- Comet 45P/Honda-Mrkos-Pajdusakova Sky Charts and Coordinates
- Comet 45P/Honda–Mrkos–Pajdušáková: Visibility - NASA
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- Elements and Ephemeris for 45P/Honda-Mrkos-Pajdusakova – Minor Planet Center
- 45P/Honda-Mrkos-Pajdusakova / 2011 – Seiichi Yoshida @ aerith.net
- 45P/Honda-Mrkos-Pajdušáková @ Royal Astronomical Society of New Zealand
- 45P/Honda-Mrkos-Pajdusakova 2001 passage at Astrosite Groningen (magnitude and coma estimates)
- 45P/H-M-P as seen by STEREO HI2A Comet Al (September 29, 2011)
- 45P as seen by STEREO-A HI-2
- 45P as seen on 2011-Jul-27 by Ernesto Guido, Giovanni Sostero & Nick Howes (GRAS 0.51m f/6.9 reflector)
- Michael Jäger color photo of 45P/Honda on 2011-09-29
- 45P as seen by SOHO on 1996/01/16 00:58 (visible halfway between the Sun and the top of the frame)
- 45P as seen by SOHO/SWAN on 2017-Feb-06 (visible upper left)
- Fritz Helmut Hemmerich, 2017-Jan-02 Astronomy Picture of the Day: Comet 45P Returns
Шаблон:PeriodicComets Navigator Шаблон:Comets
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