[LEL17] The wisdom of a late start time?

[Laid Back Rich]

If you go for a 9:00am start your deadline to finish will be 5:40am on the Friday.  If you go for a 4:00pm start your deadline to finish will be 12:40pm on the Friday.

finish Thursday, surely?

One should never try to work these things out when one is feeling tired and emotional

[frillipippi]

I will come from abroad, travelling with wife and a child. Hotel is booked near London tourist attractions before start.

Just wondering, doesn´t an early start time mean too early wake-up in the sunday, or at least hurry and stress? Hotel location means long transition to Loughton.

Should a late start time be a better choice for a foreign tourist like me? At least no sleep dep at start.

I'm in a very similar situation, even if I haven't defined all the details. I'm looking forward to starting at about midday, in order to have a proper breakfast with my family, prepare the bike, leave the hotel (or what it will be) without any hurry, and possibly enjoy the ride to Loughton.
The only downside is that I'd like to pass through the Howardian Hills at dawn, but my planning says that if I ride through the first night I'll probably be there at 3-4 AM, to early.

You won't be much too early - remember you are further north and days are longer. I doubt your timing will be that precise...

Ephemerides say the sun will rise at 5:15 AM, my question is: how long before astronomical sunrise will light be sufficient to admire Castle Howard?

[Exit Stage Left]

37 minutes 24 seconds.

[frillipippi]

Thank you, ESL. Let's hope there'll be a place available for starting at 13:37:36...   just kidding...

[Exit Stage Left]

The obvious view of Castle Howard from the route is across the lake.
https://www.google.co.uk/maps/@54.132618,-0.9186964,3a,75y,173.08h,75.75t/data=!3m6!1e1!3m4!1s9Kc1SNDGChFcuqHm9DJAkw!2e0!7i13312!8i6656?hl=en
I was taking video of the start at Loughton at 4.45am in 2013. There was enough light for that, but it's worth remembering that light comes more from the WNW in the UK at that time of year.

That shot of Castle Howard will benefit from telephoto, so low light conditions will call for a tripod. It might be quite nice with a pink tinge to the clouds.

[hellymedic]

The obvious view of Castle Howard from the route is across the lake.
https://www.google.co.uk/maps/@54.132618,-0.9186964,3a,75y,173.08h,75.75t/data=!3m6!1e1!3m4!1s9Kc1SNDGChFcuqHm9DJAkw!2e0!7i13312!8i6656?hl=en
I was taking video of the start at Loughton at 4.45am in 2013. There was enough light for that, but it's worth remembering that light comes more from the WNW in the UK at that time of year.

That shot of Castle Howard will benefit from telephoto, so low light conditions will call for a tripod. It might be quite nice with a pink tinge to the clouds.

AIUI the light will come from the East side of North after 1.13am...

[Exit Stage Left]

The obvious view of Castle Howard from the route is across the lake.
https://www.google.co.uk/maps/@54.132618,-0.9186964,3a,75y,173.08h,75.75t/data=!3m6!1e1!3m4!1s9Kc1SNDGChFcuqHm9DJAkw!2e0!7i13312!8i6656?hl=en
I was taking video of the start at Loughton at 4.45am in 2013. There was enough light for that, but it's worth remembering that light comes more from the WNW in the UK at that time of year.

That shot of Castle Howard will benefit from telephoto, so low light conditions will call for a tripod. It might be quite nice with a pink tinge to the clouds.

AIUI the light will come from the East side of North after 1am...

Your'e right of course. It's ENE. I remember cycling past Dounraey on the Northern Highlights 500 in late June 2000, and being surprised to see the sky becoming light behind it.

[Phil W]

Easy enough to get your east and west mixed up ESL

If you want unearthly light go to Antarctica in the summer. The sun circles you and dips to the horizon but never actually sets. It just touches the horizon and then starts climbing again.

[Exit Stage Left]

I was a bit out with my guess. Civil Twilight is 04.32. so actually 43 minutes.

http://app.photoephemeris.com/?ll=54.121803,-0.906128&center=54.1356,-0.8943&dt=20160801043226%2B0100&z=13&spn=0.04,0.15

Civil twilight is defined when the sun is 6 degrees below the horizon. In the morning this is known as dawn, in the evening it is called dusk. This is the limit at which twilight illumination is sufficient, under good weather conditions, for terrestrial objects to be clearly distinguished; at the beginning of morning civil twilight, or end of evening civil twilight, the horizon is clearly defined and the brightest stars are visible under good atmospheric conditions in the absence of moonlight or other illumination. In the morning before the beginning of civil twilight and in the evening after the end of civil twilight, artificial illumination is normally required to carry on ordinary outdoor activities.

http://www.sunrisesunset.com/definitions.html