Open Cluster – Page 2 – Crayford Manor House Astronomical Society Dartford

The Cooling Tower, Open Cluster, Messier 29, NGC6913

17th December 2018

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M 29, also known as NGC 6913, is an open cluster of star in the Cygnus constellation. It was discovered by Charles Messier in 1764, and can be seen from Earth by using binoculars.

This cluster can be seen in binoculars. In telescopes, lowest powers are best. The brightest stars of Messier 29 form a "stubby dipper", as Mallas says it. The four brightest stars form a quadrilateral, and another three, a triangle north of them. It is often known as the "cooling tower" due to its resemblance to the hyperboloid-shaped structures. A few fainter stars are around them, but the cluster appears quite isolated, especially in smaller telescopes. In photographs, a large number of very faint Milky Way background stars shows up.

Messier 29 can be found quite easily as it is about 1.7 degrees south and little east of Gamma or 37 Cygni (Sadr). In the vicinity of Messier 29, there is some diffuse nebulosity which can be detected in photographs.

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Images by Neil Webster

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| M1 | M2 | M3 | M4 | M5 | M6 | M7 | M8| M9 | M10 | M11 | M12 | M13 | M14 | M15 | M16 | M17 | M18 | M19 | M20 | M21 | M22 | M23 | M24 | M25 | M26 | M27 | M28 | M29 | M30 | M31 | M32 | M33 | M34 | M35 | M36 | M37 | M38 | M39 | M40 | M41 | M42 | M43 | M44 | M45 | M46 | M47 | M48 | M49 | M50 | M51 | M52 | M53 | M54 | M55 | M56 | M57 | M58 | M59 | M60 | M61 | M62 | M63 | M64 | M65| M66 | M67 | M68 | M69 | M70 | M71 | M72 | M73 | M74 | M75 | M76 | M77 | M78 | M79 | M80 | M81 | M82 | M83 | M84 | M85 | M86 | M87 | M88 | M89 | M90 | M91 | M92 | M93 | M94 | M95 | M96 | M97 | M98 | M99 | M100 | M101 | M102 | M103 | M104 | M105 | M106 | M107 | M108 | M109 | M110 |

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All images are copyright. Permission must be sought to from the image owner to the use of any of these images.

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Open Cluster, M39, NGC7092

2nd October 2018

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Messier 39 (also known as NGC 7092) is a loose open cluster with about 30 members, in the constellation of Cygnus. It was discovered by Charles Messier in 1764. M39 is at a distance of about 326 pc (1,060 ly) from Earth whose age is estimated to be from 278 million years.

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Images by Neil Webster

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Open Cluster, M35, NGC2158

1st October 2018

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Messier 35 (also known as NGC 2168) is an open cluster in the constellation Gemini. It was discovered by Philippe Loys de Chéseaux in 1745 and independently discovered by John Bevis before 1750. The cluster is scattered over an area of the sky almost the size of the full moon and is located 850 parsecs (2,800 light-years) from Earth.

The mass of M35 has been computed using a statistical technique based on proper motion velocities of its stars.[3] The mass within the central 3.75 parsecs was found to be between 1600 and 3200 solar masses (95 percent confidence), consistent with the mass of a realistic stellar population within the same radius.

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Images by Neil Webster

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Open Cluster, M52, NGC7654

15th September 2018

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Messier 52 (also known as NGC 7654) is an open cluster in the Cassiopeia constellation. It was discovered by Charles Messier in 1774. M52 can be seen from Earth with binoculars.

Close by is also the bubble nebula

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Images by Simon Dawes

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