Webmaster – Page 23 – Crayford Manor House Astronomical Society Dartford

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M12 (also known as NGC 6218) is a globular cluster in the constellation Ophiuchus. It was discovered by Charles Messier on May 30, 1764.

Located roughly 3° from the cluster M10, M12 is about 16,000 light-years distant and has a spatial diameter of ~75 light-years. The brightest stars of M12 are of 12th magnitude. It is rather loosely packed for a globular and M12 was once thought to be a tightly concentrated open cluster.

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Images by Andrew Wilson

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Globular Cluster, M10, NGC6254

14th September 2018

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M10 (also known NGC 6254) is a globular cluster in the constellation Ophiuchus. It was discovered by Charles Messier on May 29, 1764, it was described as a "Nebula without stars."

M10 has an apparent diameter of some 20', about 2/3 the apparent diameter of the moon, which translates to a spatial diameter of 83 light-years at its estimated distance of 14,300 light-years. Viewed through medium sized telescopes it appears about half that size (8' to 9'), as its brighter core is only 35 light-years across.

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Images by Andrew Wilson

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Globular Cluster, M9, NGC6333

8th September 2018

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Messier 9 (also known NGC 6333) is a globular cluster in the constellation Ophiuchus. It was discovered by Charles Messier in 1764.

M9 is one of the nearer globular clusters to the centre of the Milky Way Galaxy with a distance of around 5,500 light-years. Its distance from Earth is 25,800 light-years. The total luminosity of this cluster is around 120,000 times that of the Sun, the absolute magnitude being -8.04.

The brightest individual stars in M9 are of apparent magnitude 13.5, making them visible in moderately sized telescopes. There have been 13 variable stars found in M9.

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Images by Andy Wilson

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The Lagoon Nebula, M8, NGC6523

8th September 2018

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The Lagoon Nebula (also known as M8 and NGC 6523) is a giant interstellar cloud, classified as an emission nebula and H II region, in the constellation Sagittarius. At an estimated distance of 4,100 light-years, the Lagoon is one of only two star-forming nebulae faintly visible to the naked eye from mid-northern latitudes. In binoculars, the Lagoon is a distinct oval cloudlike patch with a definite core, like a pale celestial flower. The nebula has a fragile star cluster superimposed on it, making this one of the leading celestial sights of summer night skies.

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Image by Keith Rickard

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The Crab Nebula, M1, NGC1952

8th September 2018

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The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the constellation of Taurus.

The nebula was first observed by John Bevis, and corresponds to a bright supernova recorded by Chinese and Arab astronomers in 1054. Located at a distance of about 6,500 light-years (2 kpc) from Earth, the nebula has a diameter of 11 ly (3.4 pc) and expands at a rate of about 1,500 kilometres per second.

At the centre of the nebula lies the Crab Pulsar, a rotating neutron star, which emits pulses of radiation from gamma rays to radio waves with a spin rate of 30.2 times per second. The nebula was the first astronomical object identified with a historical supernova explosion.

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Images by Simon Dawes

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Images by Kevin Langford

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Images by Keith Rickard

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Images By Julian Tworek

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Images by Andrew Wilson

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The Great Globular Cluster in Hercules, M13, NGC 6205

3rd September 2018

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The Great Globular Cluster in Hercules (also known as M13, or NGC 6205) is a globular cluster in you guessed it the constellation of Hercules.

It was discovered by Edmond Halley in 1714, and catalogued by Charles Messier on June 1, 1764.

With an apparent magnitude of 5.8, it is barely visible with the naked eye on a very clear night from a dark site, (unlike the Crayford area). Its real diameter is about 145 light-years, and it is composed of several hundred thousand stars, the brightest of which is the variable star V11 with an apparent magnitude of 11.95. M13 is 25,100 light-years away from Earth.
Its diameter is about 23 arc minutes and it is readily viewable in small telescopes.

The Arecibo message of 1974 was transmitted toward this globular cluster. The reason was that with a higher star density the chances of a life harbouring planet, with intelligent life forms, were higher.

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Images of M13 by Simon Dawes

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Images of M13 by Brian Thompson

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Images of M13 by Martin Crow

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Images by Neil Webster

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The Dumbbell Nebula, M27, NGC6853

2nd September 2018

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The Dumbbell Nebula (also known as Messier 27, M 27, or NGC 6853) is a planetary nebula in the constellation Vulpecula, at a distance of about 1360 light years.

This object was the first planetary nebula to be discovered; by Charles Messier in 1764. At a brightness of magnitude 7.5 and its diameter of about 8 arcminutes, it is easily visible in binoculars, and a popular observing target in amateur telescopes.

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Images by Leigh Slomer

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Brian Thompson's Images of M27

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Simon Dawes Images of M27

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Martin Crow's Images of M27

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Gordon Collins' Images of M27

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Keith Rickard's Images of M27

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Andrew Wilson's Images of M27

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Debra Holton's Images of M27

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Julian Tworek's Images of M27

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Images by Neil Webster

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The Great Orion Nebula, M42

2nd September 2018

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| Webmaster

| 10:53 am

The Orion Nebula (also known as M42, or NGC 1976) is a diffuse nebula situated south of Orion's Belt. It is one of the brightest nebulae, and is visible to the naked eye in the night sky - even on a good evening in Bexleyheath.

M42 is located at a distance of 1,270±76 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across.

The Orion Nebula is one of the most scrutinized and photographed objects in the night sky, and is among the most intensely studied celestial features. The nebula has revealed much about the process of how stars and planetary systems are formed from collapsing clouds of gas and dust. Astronomers have directly observed protoplanetary disks, brown dwarfs, intense and turbulent motions of the gas, and the photo-ionizing effects of massive nearby stars in the nebula.

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M42 Images by Simon Dawes

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M42 Images by Julian Tworek

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M42 Images by Brian Thompson

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M42 Images by Honor Wheeler

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M42 Images by Martin Crow

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M42 Images by Keith Rickard

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Images by Leigh Slomer

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M42 Images by Andy Wilson

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Images by Neil Webster

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Images by Steve Goldson

M45, The Pleiades

30th August 2018

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| Webmaster

| 6:15 pm

The Pleiades (M45) are an open star cluster in the constellation of Taurus. It is among the nearest star clusters. It is the cluster most obvious to the naked eye in the night sky. Pleiades has several meanings in different cultures and traditions.
The cluster is dominated by hot blue stars that have formed within the last 100 million years. Dust that forms a faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster (hence the alternate name Maia Nebula after the star Maia), but is now known to be an unrelated dust cloud in the interstellar medium that the stars are currently passing through. Astronomers estimate that the cluster will survive for about another 250 million years, after which it will disperse due to gravitational interactions with its galactic neighbourhood.

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Images by Simon Dawes

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Imaged by Simon Dawes.
William Optics ED80, Canon 650D, 105m integration

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Images by Honor Wheeler

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Images by Neil Webster

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[caption id="" align="aligncenter" width="800"] Image by Neil Webster - no Details Provided[/caption]

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Image by Brian Thompson

Date: 18/02/2015
Equipment: Orion Optics VX10 scope, Skywatcher NEQ6 mount, Mono Atik 383L camera, QHY5 Guide Camera.
Frames:13 X 120s lights, no darks.
Processing: Stacked and processed in Astro Art.

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Imaged by: Andrew Wilson
Method: MX916 CCD with 35mm lens, 10 x 5 seconds

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Imaged by Keith Rickard
Method: Olympus OM1n 210mm telephoto lens, piggy-backed on LX200 8", Kodak Elitechrome ISO 200 film, 20 minutes. (Published in Astronomy Now!)

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Imaged by Martin Crow at Kelling Heath Star Party 2012

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Imaged by Julian Tworek
Instrument: AstroTrac Canon 100-400 lens @ 200mm ISO1600 13 x 120s Images Canon 20D (Modified)
Details: Taken at Kelling heath Star Party

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2019 Calendar

29th August 2018

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| Webmaster

| 7:44 pm

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Some of you who were present at the Pavilion on the 29th of March will be aware of the following changes to the Society’s Calendar rules. Each month will now consist of a collage of member’s images rather than just one per month.

The Calendar size will also increase from 21 x 28cm to 28 x 37cm picture size to accommodate the collage of images, I am unsure how many images can be accommodated per page but it may be between 6 to 8, actual numbers TBA. Price TBA.

Rather than the list of 4 groups such as the Moon, Sun, Deepsky etc. there will be a list of 'Targets' for member’s to photograph or sketch.

Important: Image/s to be submitted for the 2019 Calendar must have been photographed or sketched after the 1st of January 2012 but no later than 8pm (GMT) on the 3rd of October 2018.

(All images for the 2020 Calendar will need to been photographed or sketched AFTER the 3rd of October 2018 but before the 2nd of October 2019 so keep this in mind when submitting your images).

DON’T FORGET TO READ THE RULES!

PLEASE DO YOUR BEST TO TAKE PART, THANKS.

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Target images for the 2019 CMHASD Calendar are as follows:

1. Earthshine

The Moon’s shadow side can often be seen when the young crescent Moon is visible. Images must show the Moon with the shadowed side also visible

2. A Rainbow

Images can be an Arc or a portion of the Rainbow.

3. The Planets

Images can be of any of the Planets (not the Earth that would be cheating ;)

4. Lunar and/or Planetary Conjunctions

Images can be of the Moon in conjunction with Planet/s or a planetary line-up of 2 or more Planets.

5. The Orion constellation

Images that show the Orion constellation in full as the left image or as the image on the right with the four stars Betelgeuse, Bellatrix, Saiph and Rigel at each corner.

6. Lunar Eclipse

A Lunar eclipse will hopefully be visible on the 27th of July but any images photographed or sketched after the 1st of January 2012 can be submitted. The Moon partially or fully eclipsed will be acceptable.

7. Atmospheric Optics

Images of any of the following: Solar Halo, Sundogs, Circumzenithal Arc, Cloud Iridescence and Crepuscular Rays etc.

8. The Andromeda Galaxy

A close-up image of this wonderful Galaxy.

9. Sunset or Sunrise

Any photograph or sketch of a Sunrise or Sunset over land or water.

10. Lunar crater Copernicus

A close up of the crater Copernicus photographed or sketched using a Telescope or a Telephoto lens.

11. Sunspots

Images of Sunspots in White Light or a projected image only, not H-alpha (as only a few members have H-alpha telescopes).

12. Ursa Major constellation

Images of the whole constellation or the Plough will be acceptable.

13. A Full Moon

The Moon must be between 98 – 100% to qualify for this Target, you’ll need to make sure as I will check the date and the image was photographed or sketched.

14. The Pleiades and/or the Hyades

An image of either the Pleiades or the Hyades or an image of them together.

I am aware there are 14 Targets, not everyone will be able to image all of the Targets so hopefully this way everyone will be in with a sporting chance of obtaining at least one image for the Calendar.

Rules: And please make sure you read them!

You may only enter one image per category.
Sketched, Single, Multiple Stacked or Mosaicked images are acceptable, Composite images are NOT acceptable.
All images entered must have been Photographed or Sketched by the person entering the image/s.
If too many images (maximum numbers TBA) are entered for one ‘Target’ then a vote will be taken on each image and the images with the most votes will be included in the Calendar.
All images MUST have been taken AFTER the 1st of January 2012 but before 8pm (GMT) on the 3rd of October 2018.
The two ‘Targets’ with the least number of images received will not be included in the Calendar.
Images can be taken using another member’s telescope but the camera used MUST belong to the member submitting the image/s.
Poor quality images will have to be omitted so make sure the image resolution is good enough for printing.
All images MUST be submitted to this email address: honor . draconis @ talk21 .com (remove spaces) BEFORE 8pm (GMT) on the 3th of October 2018, no exceptions.

When emailing your images please use the email subject heading ‘CMHASD CAL2019’ that way I can save the images easily all in one place!

Small print - Feel free to ask me any questions that are not covered by the rules but if you do ask me a question that IS covered by the rules…then I’ll know you didn’t read them! Simon, Martin, Jim….! [this is scandalous Ed.]

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