astro.wikisort.org - Comet

6P/d'Arrest (also known as d'Arrest's Comet or Comet d'Arrest) is a periodic Jupiter-family comet in the Solar System, orbiting between Mars and Jupiter. It passed 0.15124 AU (22,625,000 km; 14,059,000 mi) from the Earth on August 12, 1976.[4] The most recent perihelion passage took place on September 17, 2021, when the comet had a solar elongation of 95 degrees at approximately apparent magnitude of 10.[5]

6P/d'Arrest

Discovery
Discovered by	Heinrich Louis d'Arrest
Discovery date	June 28, 1851
Alternative designations	1678 R1, 1851 M1, 1857 X1, 1910c, 1923b, 1950a, 1963f, 1970d, 1976e, 1982e, 1987k
Orbital characteristics A
Epoch	2009-Jan-10 (JD 2454841.5)
Aphelion	5.637 AU
Perihelion	1.353 AU
Semi-major axis	3.495 AU
Eccentricity	0.6127
Orbital period	6.54 a
Inclination	19.51°
TJupiter	2.71
Earth MOID	0.34 AU (51 million km)
Dimensions	3.2 km[1]
Last perihelion	2021-Sept-17[2] March 2, 2015[3] August 14, 2008
Next perihelion	2028-Mar-31 (JPL Horizons)

The comet last came to perihelion (closest approach to the Sun) on March 2, 2015,[5] but it was in an unfavorable apparition as it had a solar elongation of less than 30 degrees from October 2014 until May 2015.[6]

In 1991, Andrea Carusi and Giovanni B. Valsecchi (Istituto Astrofisica Spaziale, Rome), and Ľubor Kresák and Margita Kresáková (Slovak Astronomical Institute, Bratislava) independently suggested this comet was the same as a comet observed by Philippe de La Hire in 1678.[7][8]

It was first observed by Heinrich Ludwig d'Arrest, in Leipzig, Germany, on 28th and 30 June 1851.[7]

The comet nucleus is estimated at about 3.2 km in diameter.[1]

6P/d was one of a trio of comets targeted by the ill-fated CONTOUR mission, an unmanned discovery program mission, that was launched but contact was lost soon after reaching orbit.

If it had been functional, the planned date for CONTOUR's study of d'Arrest would have been 2008, after visiting two other comets.[9]

Around 2007, 6P/d was one of nine comets examined for a comet sample return mission study.[10] In the 2010s a comet surface sample return mission was selected as the New Frontiers Program finalist, but the recently studied comet 67P was chosen as the selected target.

See also

• List of missions to comets

References

External links

• Orbital simulation from JPL (Java) / Horizons Ephemeris
• 6P/d'Arrest at CometBase database
• Elements and Ephemeris for 6P/d'Arrest – Minor Planet Center
• 6P/d'Arrest – Seiichi Yoshida @ aerith.net
• 6P – Gary W. Kronk's Cometography

Numbered comets
Previous 5D/Brorsen	6P/d'Arrest	Next 7P/Pons–Winnecke

На других языках

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[de] 6P/d’Arrest

6P/d’Arrest ist ein kurzperiodischer Komet, der von Heinrich Louis d’Arrest am 28. Juni 1851 entdeckt wurde.

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- [en] 6P/d'Arrest

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[es] 6P/d'Arrest

6P/d'Arrest (también conocido como cometa d'Arrest') es un cometa periódico del Sistema Solar, orbita entre Marte y Júpiter. Pasó a cincuenta y tres millones de kilómetros de la Tierra, cerca de una tercera parte de la distancia entre la Tierra y el Sol, el 9 de agosto de 2008.

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[ru] 6P/д’Арре

Комета д’Арре (6P/d’Arrest) — короткопериодическая комета из семейства Юпитера, которая была открыта 28 июня 1851 года прусским астрономом Генрихом д’Арре в созвездии Рыб. Он описал её как «очень большую, но слабую». Комета обладает довольно коротким периодом обращения вокруг Солнца — чуть менее 6,56 года.

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