ExoPlanet transit of HAT-P-23b by Keith Rickard

One more for the ExoClock project - this one being the first for CMHASD trustee and treasurer Keith Rickard.  It is of Exoplanet HAT-P-23b in the constellation Delphinus.

''HAT-P-23 b is a gas giant exoplanet that orbits a G-type star. Its mass is 2.09 Jupiters, it takes 1.2 days to complete one orbit of its star, and is 0.0232 AU from its star. Its discovery was announced in 2010.'' Ref:https://exoplanets.nasa.gov/exoplanet-catalog/1345/hat-p-23-b/

For more information about HAT-P-23b click here https://exoplanet.eu/catalog/hat_p_23_b--737/

Superb Sun Pillar imaged by John Archer

Whilst travelling early morning on a train to London, CMHASD Chairman John Archer saw this fine example of a sun pillar on the 23rd October 2023. 

''Sun pillars and light pillars are beams of light that extend vertically upward (or downward) from a bright light source, such as the sun or another bright light low on the horizon. They can be 5 to 10 degrees high and sometimes even higher. In fact, they might lengthen or brighten as you gaze at them.  They’re beautiful and wondrous. And they’re also the source of some UFO reports!

When is the best time to see them?

You’ll most often see sun pillars when the sun is low in the western sky before sunset, or low in the east just after the breaking of dawn. However, you might even see a sun pillar when the sun is below the horizon. On the other hand, you can see light pillars at any time of night.  They’re called sun pillars when the sun helps make them. But the moon or even streetlights can create this light phenomenon, too, in which case the name light pillar is more appropriate.'' Ref:https://earthsky.org/earth/what-is-a-sun-pillar/

For more information about sun pillars see Les Cowley’s brilliant website Atmospheric Optics .

Comet C/2023 P1 (Nishimura) imaged by Martin Crow

C/2023 P1 (Nishimura) is a long-period comet discovered by Hideo Nishimura on 12 August 2023 and member Martin Crow imaged it on the 20th August 2023.  At the time of its discovery, the comet was in the constellation of Gemini and shining at magnitude +10.4.

Image details: 5x60sec exposures. 235mm diameter SCT @ f5.4, SX694 mono CCD.

ExoPlanet TrES-3b transit – observed by Simon Dawes

Another for the ExoClock project by Simon Dawes of the transit of exoplanet TrES-3b.

TrES-3b is in a very tight orbit around its host star, TrES-3, transiting the stellar disk once per 31 hours. For comparison, Mercury orbits the sun once every 88 days. TrES-3b is just a little larger than Jupiter, yet orbits around its parent star much closer than Mercury does, making it a “hot jupiter.”

CMHASD supporting the BAA at New Scientist Live – ExCel London 2023

Crayford Manor House Astronomical Society Dartford (CMHASD) were out in force at the recent New Scientist Live event at ExCel Centre, London Docklands on the 7th to 9th October 2023.  We were there to help the British Astronomical Association (BAA) on their stand over the 3 days to promote the BAA and answer questions from members of the public, school children and teachers on all things astronomical.

CMHASD member Diane Clarke wrote ''As part of our display we had several 3D printed items which  included: M51, painted scale models of the planets Mars & Jupiter and a section of the largest canyon in the Solar System the Valles Marineris. 

Issac and Tinie the CMHASD Dobsonian telescopes were a favourite with all.  Visitors to the stand were able to look through Issac and Tinie at a 7m diameter inflated printed globe of the planet Mars.

All of these proved great talking points enabling us to make several sales as well as promoting membership of the BAA.

Among the visitors to the BAA’s stand was Professor Richard S. Ellis with his family; who had earlier in the day given a talk titled When galaxies were born: First results from the James Webb Space Telescope to a packed audience.

All in all, everybody who staffed the stand enjoyed the experience.  Over the 3 days their enthusiasm & knowledge radiated to everybody that visited the stand, hopefully resulting in future new members of the BAA.''

CMHASD would like to thank all their members who helped over the 3 days and to Diane Clarke for sharing her photos of the event.

CMHASD Solar Observing at Hall Place – 19th August 2023

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

On Saturday the 19th of August several members of the Society were present for the second of our 2 solar observing sessions at Hall Place & Gardens.  Below are some photos of the day.  Thank you to Dr Mike Rushton, Honor Wheeler, Jim Burchell, Omila and Diane Clarke for sharing your photos.

The Sun in Hydrogen Alpha taken by Honor Wheeler using a Personal Solar Telescope (PST).

 

The Sun in white light taken by Omila using an iPhone with an adapter and telescope fitted with a Solar filter.

[ngg src="galleries" ids="74" display="basic_slideshow"]

Full Moon & the final Supermoon of 2023 – 29th Sept 2023

Several CMHASD members were out on the 29th September 2023 to image the final Supermoon of 2023 and below are their images.  This full Moon is also known as the Harvest Moon as it is the closest Full Moon to the September equinox this year. 

Most years, the Harvest Moon is in September but around every three years it’s in October.  When the Harvest Moon occurs in September it replaces the Corn Moon. When it happens in October it takes the place of the Hunters Moon.

Kevin Smith's image taken from Deal, Kent.

Honor Wheeler's images taken from Dartford, Kent.

Dominique Ferrand's image taken from Cordoba, Spain.  Dominique's image is of the full Moon and Jupiter.

For more information: https://www.timeanddate.com/astronomy/moon/harvest.html

Annular Solar Eclipse 2023 – Richard Bohner

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

On Saturday 14th October 2023 an annular solar eclipse crossed North, Central and South America.   

Member Richard Bohner; who lives in the USA wrote ''Hello all. There will be an annular solar eclipse here in Arizona on 14 October at 9:30 AM. The path is crossing the “Four Corners” area (where Utah, Colorado, Arizona, New Mexico come together). I am coming back from a week holiday in Colorado, but leaving early in morning (6 AM) to get to my spot to observe the eclipse at 8:30 AM. I will have photos to post.'' and here they are...

Some info on eclipse -  Moon distance 246,504 miles and Moon coverage of sun 95.2%

Richard used his old Meade ETX 70 to acquire the photos.

The Sun and the Wilson Effect – Simon Dawes

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

On the 26th September 2023 member Simon Dawes imaged the Sun.  One of his images of the sunspots on the Sun that day showed an interesting effect called the 'Wilson Effect'.  The Wilson effect is the perceived depression of a sunspot's umbra or centre in the Sun's photosphere.

Sunspot AR3443 showing the 'Wilson Effect'

https://britastro.org/section_information_/solar-section-overview/wilson-effect-observers-challenge

TOP