45P/Honda–Mrkos–Pajdušáková
| Discovery | |
|---|---|
| Discovered by | Minoru Honda |
| Discovery date | December 3, 1948 |
| Orbital characteristics A | |
| Epoch | 2011-Jun-08 (JD 2455720.5) |
| Aphelion | 5.511 AU |
| Perihelion | 0.5296 AU |
| Semi-major axis | 3.0205 AU |
| Eccentricity | 0.8246 |
| Orbital period | 5.25 yr |
| Inclination | 4.257° |
| Last perihelion | September 28, 2011[1] June 29, 2006[2][3] March 29, 2001 December 25, 1995 |
| Next perihelion | 2016-Dec-31[4] |
45P/Honda–Mrkos–Pajdušáková is a short-period comet discovered by Minoru Honda December 3, 1948.[5] The comet is named after Minoru Honda, Antonín Mrkos, and Ľudmila Pajdušáková. The comet is on an elliptical orbit with a period of 5.25 years.[1] The comet nucleus is estimated to be 0.5-1.6 kilometers in diameter.[1][6] During the 2011 perihelion passage the comet was recovered on 5 June 2011 at apparent magnitude 21.[7] On 8 July 2011 the comet had a magnitude of approximately 18,[8] and as of 22 July 2011 the comet's nuclear condensation had a magnitude of approximately 16.[9] The comet is expected to reach a peak magnitude of around 7.3 in late September when it is near perihelion.[10]
The comet made a close approach of only 0.0600 AU (8,980,000 km; 5,580,000 mi) from the Earth on August 15, 2011,[11][12] and was studied by the Goldstone Deep Space Network on August 19 and 20.[6] Goldstone radar observations on 2011 August 19 and 20 detected echoes from the nucleus and coma.[13] This is only the fifteenth comet that has been detected with radar.[13] The comet will also pass close to Earth on February 11, 2017.[11]
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.[5]
References
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- 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 half way between the Sun and the top of the frame)
| Periodic comets (by number) | ||
|---|---|---|
| Previous 44P/Reinmuth |
45P/Honda–Mrkos–Pajdušáková | Next 46P/Wirtanen |
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