ExoPlanet transit of TrES-3b by Dr Mike Rushton

The transit of Exoplanet TrES-3b by CMHASD member & trustee Dr. Mike Rushton using an eVscope for the ExoClock project.

TrES-3b is a gas giant exoplanet orbiting the star GSC 03089-00929 a G-type star and is 0.02282 AU from its star. It has an orbital period of just 31 hours and nearly twice the mass of Jupiter.  It was found by the Trans-Atlantic Exoplanet Survey in 2007. It was discovered in the constellation Hercules about 10 degrees west of the star Vega.

The planet TrES-3b is named Umbäässa. The name was selected in the NameExoWorlds campaign by Liechtenstein, during the 100th anniversary of the IAU. In the local dialect of southern Liechtenstein, Umbäässa is a small and barely visible ant. 

Crepuscular rays at the pavilion by Honor Wheeler

A lovely image taken by member Honor Wheeler on the 10th August 2023 whilst at the pavilion on an informal night of some crepuscular rays.

''Crepuscular rays are sunbeams that originate when the Sun is just above or below a layer of clouds, during the twilight period; which extend over the western sky radiating from the position of the Sun.  Crepuscular comes from the Latin word crepusculum meaning "twilight".  Loosely, the term crepuscular rays is sometimes extended to the general phenomenon of rays of sunlight that appear to converge at a point in the sky, irrespective of time of day.'' Ref: https://en.wikipedia.org/wiki/Crepuscular_rays

''The radiating appearance of the bands is caused by perspective, as demonstrated by the fact that when on rare occasions the rays extend across the entire sky, they appear to converge again on the eastern horizon. This rare related phenomena are called anticrepuscular rays and so appear at the same time (and coloration) as crepuscular rays but in the opposite direction of the setting sun (east rather than west).'' Ref: https://www.britannica.com/science/crepuscular-ray

Moon & Jupiter by Diane Clarke

A lovely image of the Moon and Jupiter taken by member Diane Clarke.

Diane wrote '' Jupiter & the Moon 4° apart.  I went to image this event as it rose above my local horizon, but the sky was cloudy so I decided to wait as both Jupiter & the Moon would need to clear a local stand of trees.  Fortunately, after they cleared the trees the sky broke giving me the opportunity to take an image of the event.

Image taken:  01.10.23 @22.33 hrs BST.  Camera: Canon EOS M50m2.  Lens: Canon EF L 100 – 400mm @ 160mm, F-stop f/5.6 @ 1/320 sec and ISO 800.''

Crescent Nebula by Kevin Langford

A stunning image of the Crescent Nebula taken by member Kevin Langford on the 5th Sept 2023.

''The Crescent Nebula (also known as NGC 6888Caldwell 27Sharpless 105) is an emission nebula in the constellation Cygnus, about 5000 light-years away from Earth. It was discovered by William Herschel in 1792. It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with and energizing the slower moving wind ejected by the star when it became a red giant around 250,000 to 400,000 years ago. The result of the collision is a shell and two shock waves, one moving outward and one moving inward. The inward moving shock wave heats the stellar wind to X-ray-emitting temperatures.''  Ref: https://en.wikipedia.org/wiki/Crescent_Nebula

Details of how Kevin acquired the image are below.

ES 102ED APO, EQ5 Pro
ZWO ASI071, Orion MMAG, L-Enhanced filter
4hrs of exposures
Capture software N.I.N.A and processed using Siril and Affinity Photo
Taken in Bexley, Kent.

Solar Observing at Hall Place & Gardens – Sunday 6th August 2023

NEVER LOOK AT THE SUN DIRECTLY. Please click here for solar observing safely.

Sunday 6th August 2023 – What a glorious day to be out solar observing which is what Crayford Manor House Astronomical Society Dartford (CMHASD) where doing at Hall Place & Gardens in Bexley. 

What a busy day it was too! Several telescopes were set up to observe the Sun safely and members of the public were invited to do some solar observing which was readily accepted by many.  The Sun put on a good display having several sunspots and prominences for the public to view.

Chairman John Archer wrote ''On Sunday 6th August, the team from CMHASD set ourselves up for the first of our two Solar Observing events at Hall Place & Gardens.

The forecast was for early morning sun, followed by sunny intervals until around 11am, but cloudy conditions until the arrival of rain at 4pm. Given that our timeslot was effectively 11am – 3pm, we were nervous to say the least!

Our pitch was on the grass at the end of the path from the main entrance to the gardens, and we were quite close to the hard standing outside the art gallery and café. With the date being chosen to coincide with the Farmers’ Market, we experienced good foot-fall and our flag was prominent for visitors as they arrived.

At one point we had around a dozen members in attendance and the public were treated to displays of sunspots the like of which we haven’t seen for years. Whilst the big Dob Anita was an immediate attraction, we had Tinie, two solar projectors and a range of H-Alpha and white light filtered scopes with which to demonstrate safe solar observing to a very interested public.

Of particular note was the filtered refractor which Honor had set up with a digital camera attached, affording visitors a proper “live view” of the surface of the sun. Each of the scopes were able to display clear views of sunspots such was their size and quantity. This solar cycle has certainly picked up in terms of activity and although the local forecast was for cloudy conditions, we very much lucked out in terms of clear spells so the public were very fortunate that during the period while the Farmers’ Market was trading, we were able to keep them entertained and educated.

The Crayford team returns again later in August for our second session but there’s no doubt this first visit to Hall Place for Solar Observing in 2023 was a great success.''

Below is an image of the Sun on the 6th August 2023 taken by member Honor Wheeler.  The Sun was very active with lots of sunspots. Image acquired using an ED80 Refractor, EQ3 Synscan mount, Canon M6 MarkII, 2x lens Barlow and ISO200/ exp 1/1250s.

CMHASD will be back at Hall Place on Saturday 19th August 2023 to do some more Solar Observing with the public. Please do come and join us!

Thank you to John Archer, Diane Clarke and Honor Wheeler for sharing your photos of the day with us.

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Informal Nights at the Society

A few photos showing what members get up to on our 'informal nights' at the Society.  Activities range from observing, testing/setting up members' latest equipment purchased, fixing members' equipment, presentations, general chit chat & banter plus games.

20th July 2023

27th July 2023

Good weather so members took the chance to observe. Dave, Steve & Honor with telescope 'Tinie'.

Member Honor Wheeler's image of the Sun through Society telescope 'Tinie' fitted with a solar filter - built by members Steve Floodgate & Dave Grist.

Our Active Sun by Simon Dawes

More stunning images of our active Sun taken by member Simon Dawes in the later half of July 2023.  Details of how Simon acquired his images are on the photos.

For more information about the Sun, its structure, atmosphere, sunspots, solar cycle and magnetosphere click on https://solarsystem.nasa.gov/solar-system/sun/in-depth/

12th July 2023

 

26th July 2023

 

29th July 2023

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