Webmaster – Page 13 – Crayford Manor House Astronomical Society Dartford

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Some images from Jim showing some unusual cloud formations at the pavilion.

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Mammatus Clouds & Rainbow

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Mammatus Clouds

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Mammatus Clouds

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Meteor report for June 2019

4th July 2019

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| 8:46 pm

A total of 11 Sporadic were identified, out of a total of 21 meteors analysed. The brightest being of magnitude -2.5

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MeteorReport2019-06

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Solar Eclipse Argentina 2019

2nd July 2019

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| Webmaster

| 1:27 pm

Some members travelled to Argentina to view the 2019 Solar Eclipse, images below are from Janice McClean

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[ngg src="tags" ids="SolarEclipse2019" display="basic_slideshow"]

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Meteor Detector Report for May 2019

8th June 2019

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| Webmaster

| 9:01 am

MeteorCam2019-05 The short nights and poor weather have conspired to reduce the number of meteors we have been able to detect, but we still managed to detect 44 meteors, 30 of them sporadic.

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Observing the Moon with our new Dobs, ‘Olivia’ and ‘Isaacs’

8th June 2019

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| Webmaster

| 7:41 am

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Thursday 6th June was clear so we took the opportunity to view the Moon using our new Dob's affectionately named 'Olivia' and 'Isaac'.

IMG_20190606_212235

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Colimating-a-dob

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IMG_20190606_211422

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20190606_210722

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Building Dobsonian Mounts

7th June 2019

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| Webmaster

| 7:37 pm

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Members Steve and Dave with some technical support from Keith have built another two Dobsonian telescopes for the society using donated Newtonian tubes, one is a 200mm F5 Skywatcher the other a 300mm F5.3 Orion Optics.

The design is the same as the previous Dobsonian mount they presented to the society last year, which is affectionately known as Anita.

The Telescopes are equipped with a 'push-to' system we call 'Dob Buddy' which was originally presented to the society by fellow member Simon. The Dob buddy allows members using an Android or Apple mobile device, equipped with Sky Safari Pro to locate difficult to find objects in the night sky with ease.

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dobbuddydiagram1

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dobbuddydiagram2

dobbuddydiagram3

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The Plans

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Dobbuddyplans1

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The Dob buddy system uses an Arduino with low resolution encoders couples to the mount with timing belts, this system results in a very high resolution encoder system for a fraction of the costs (the encoders are £8!), all the heavy lifting in terms of tracking the telescopes position is managed by the Sky Safari Pro software. The limitations of the Apple IOS operating system not being able to send data over Bluetooth are circumvented by providing Wi-fi access to Dob Buddy.

dobbuddyphoto2

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Two mounts were constructed from Birch faced ply. It was decided that Anita (our first Dobsonian) was a bit heavy, so the new Dob's were put on a diet, by cutting holes in the ply.

dobsonian_buildingthemounts

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Parts ready for assembly.

dobsonian-partscut

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Our Dobs are named after gifted musicians, because we used their vinyl LPs as a bearing for the azimuth mount.

dobsonian-assembly

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The design of the mounts for the altitude bearings was changed (compared to 'Anita') to again reduce weight and reuse as much as possible of the old 'scopes.

dobsonians-alybearings Our Dobs are named after gifted musicians, because we used their vinyl LPs as a bearing for the azimuth mount.

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Isaac and Olivia complete.

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Isaac and Olivia complete.

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BAA Winchester Weekend 2022

At this years 2022 BAA Winchester weekend members Steve Floodgate and Dave Grist presented an update about their experiences of building Dobsonian telescopes for the society. Below is a link that you can click on to download a PDF version of the PowerPoint presentation they used at the event.

Winchester presentation update1

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22 Degree Solar Halo

3rd June 2019

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| 8:18 pm

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Images By Diane Clarke

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First Light with a new CCD on RS Boo

3rd June 2019

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| 8:10 pm

A phase curve from Martin Crow's first four sets of test observations using the pulsating star RS Boo as a target. Period 0.37733days. Acquired with 235mm SCT @ f6.3 and SX694 camera and sxcon software . Processed with AIJ and VSS spreadsheet.

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Meteor Report for 2019-04

13th May 2019

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| 9:47 pm

Only 54 Meteors captured this month, mainly sporadic meteors with a few obscure showers.

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Double Star Measurements with a Meade 12mm Astrometric Eyepiece in 2018

10th May 2019

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| 6:16 pm

Neil Webster, St Marys Platt, Kent

e-mail: ******@gmail.com

Introduction

The following measurements were made throughout 2018 using a Meade 12mm astrometric illuminated reticle eyepiece plus 2.5x powermate attached to an Altair Astro 115mm refractor (focal length 805mm, f7). The total magnification was 167.5x with a field of view of 0.3 degrees.

Fewer measurements were made this year due to relocation which finally happened at the end of February. Serious observing, measuring and imaging did not begin until the middle of April. Although St Marys Platt is a much darker site than Bromley measurements are still limited to 8.5 magnitude due to the red light in the eyepiece. However, a Southerly aspect is now available so many of the measurements are of systems previously unavailable.

Read the full report here