Day Light Saving

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Day Light Saving

Postby Graeme1858 » Thu Oct 18, 2018 10:12 pm

When I switch on my Celestron mount one of the questions on the hand set is Day Light Saving?

Would the answer be yes because we're in BST or no because we're in BST and it's already accounted for. Or no because we're in BST and it's already accounted for!

Also, we'll be in GMT in a couple of weeks, so, what then?

TIA

Graeme
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Re: Day Light Saving

Postby Gfamily2 » Thu Oct 18, 2018 10:47 pm

Graeme1858 wrote:When I switch on my Celestron mount one of the questions on the hand set is Day Light Saving?

Would the answer be yes because we're in BST or no because we're in BST and it's already accounted for. Or no because we're in BST and it's already accounted for!

Also, we'll be in GMT in a couple of weeks, so, what then?

TIA

Graeme


For my Skywatcher, if you're entering BST then you put "Yes" for DaylightSaving.
Scopes: Meade 8" SCT, Skywatcher 127mm Mak, Raffle winner of SW ST80
For imaging: Pentax K5, Asda webcam, Star Adventurer (new toy)
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Re: Day Light Saving

Postby Graeme1858 » Fri Oct 19, 2018 4:08 pm

Ok, cheers for that. So the mount thinks in GMT!
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Re: Day Light Saving

Postby Gfamily2 » Fri Oct 19, 2018 4:18 pm

Graeme1858 wrote:Ok, cheers for that. So the mount thinks in GMT!

I'm sure they would say they think in UTC I think; but essentially, yes! :)
Scopes: Meade 8" SCT, Skywatcher 127mm Mak, Raffle winner of SW ST80
For imaging: Pentax K5, Asda webcam, Star Adventurer (new toy)
For companionship: Mid Cheshire Astronomical Group.
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Re: Day Light Saving

Postby Graeme1858 » Fri Oct 19, 2018 5:48 pm

I'm sure they would. But I'm old and I did my astronomy studying at Greenwich Observatory which sits on the Greenwich meridian! :lol: (In that round room that's full of history that you see on the S@N sometimes!)
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Re: Day Light Saving

Postby Aratus » Fri Oct 19, 2018 10:41 pm

I stick to UT (GMT) all year round, (for Astronomy anyway!) I have a 'radio' clock which I keep to UT, and I ignore Daylight Savings Time when the mount asks. I sometimes get into trouble in the summer when I think it is an hour earlier than it really is, and I end up being late for something, :? but otherwise it is a lot less confusing than having an hour disappear, or having to repeat the same hour over.

I agree that when these mounts ask you to confirm DST or Standard Time, it is asking you to tell it which clock time you are currently using. It doesn't know when the local times might change. It is the sort of thing that politicians are likely to tinker with from time to time, so it is no good programming it into the mount's computer. Another good reason to stick to UT.
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
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Re: Day Light Saving

Postby Graeme1858 » Sat Oct 20, 2018 7:52 am

Aratus wrote:I stick to UT (GMT) all year round, (for Astronomy anyway!)


That's a good idea. GMT (UT) for astronomy it is then (And setting the alarm for getting up for work!)
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Celestron CGX 9.25" SCT
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Re: Day Light Saving

Postby voyager » Sat Oct 20, 2018 2:13 pm

Astronomical almanacs and databases are presented in UT, hence its native use of UT. Here's a relevant article:
https://www.skyandtelescope.com/astrono ... stronomer/

Speaking personally, I stay on UT all-year round - the whole idea of "daylight savings" is utterly daft and I choose not to participate in the madness of changing clocks twice per year...
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Re: Day Light Saving

Postby Graeme1858 » Sat Oct 20, 2018 11:56 pm

Good article.

The history of clocks and the railway is quite an interesting one.
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Location: Kent, UK, 51°28’N 0°38’E

Re: Day Light Saving

Postby Aratus » Sun Oct 21, 2018 4:57 pm

voyager wrote:Astronomical almanacs and databases are presented in UT, hence its native use of UT. Here's a relevant article:
https://www.skyandtelescope.com/astrono ... stronomer/

Speaking personally, I stay on UT all-year round - the whole idea of "daylight savings" is utterly daft and I choose not to participate in the madness of changing clocks twice per year...


A lot of people don't like the early nights of UT, but of course it great for astronomers. If I thought that stopping the changes would mean that we stayed at GMT/UT all year I would go for it, but all the proposals I've heard would stick us on permanent summer time. :x
That means dark mornings - especially in Northern and Eastern areas of the UK, and of course later evenings. (I'm old enough to remember the 1968/71 'British Standard Time' experiment!)

So I'm very happy to have the clocks go back in the winter - back to what they should be given our position on the earth.
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
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