Sunset

I hope that I am asking this question in the right place, so please
bear with me as a newbie!

I have been asked by a solicitor to find out at what rate the sun sets
in Coventry between 7pm and 8pm on 3rd June.

I guess the question is about angle of elevation above the horizon i.e.
angle of fall per time unit?

It's for a court case up and coming this month, so I would appreciate
some help please.

Thanks

Steve Jackson
Bablake Weather Station
Coventry UK
www.bablakeweather.co.uk

In article . com,
wrote in crayon on my screen...

I have been asked by a solicitor to find out at what rate the sun sets
in Coventry between 7pm and 8pm on 3rd June.

Can't help you with the answer but make sure you charge him the going
rate for your services
--
Craig Oldfield

On Mon, 08 Jan 2007 15:12:47 GMT, Craig Oldfield wrote:
In article . com,
wrote in crayon on my screen...

I have been asked by a solicitor to find out at what rate the sun sets
in Coventry between 7pm and 8pm on 3rd June.

Can't help you with the answer but make sure you charge him the going
rate for your services

Agreed about the costs. Sounds like you need to buy a full-price
version of ... hmmmm ... Let's start with TheSky Professional v6.
Better get copy of SkyMap too, for corroboration. ;-)

Your lawyer friend and more importantly the "opposition" in the case
will not be impressed if you stand up in court and say you got the info
off the internet.

Pete

--
.................................................. .........................
.. never trust a man who, when left alone ...... Pete Lynch .
.. in a room with a tea cosy ...... Marlow, England .
.. doesn't try it on (Billy Connolly) .....................................

Wasn't it Steve J who wrote:
I hope that I am asking this question in the right place, so please
bear with me as a newbie!

I have been asked by a solicitor to find out at what rate the sun sets
in Coventry between 7pm and 8pm on 3rd June.

I guess the question is about angle of elevation above the horizon i.e.
angle of fall per time unit?

It's for a court case up and coming this month, so I would appreciate
some help please.


Here's a list of values for the angle of elevation every 5 minutes

Date Time Altitude
03 Jun 2006 19:00:00 +19° 02' 16"
03 Jun 2006 19:05:00 +18° 18' 50"
03 Jun 2006 19:10:00 +17° 35' 35"
03 Jun 2006 19:15:00 +16° 52' 31"
03 Jun 2006 19:20:00 +16° 09' 39"
03 Jun 2006 19:25:00 +15° 27' 00"
03 Jun 2006 19:30:00 +14° 44' 35"
03 Jun 2006 19:35:00 +14° 02' 24"
03 Jun 2006 19:40:00 +13° 20' 28"
03 Jun 2006 19:45:00 +12° 38' 49"
03 Jun 2006 19:50:00 +11° 57' 26"
03 Jun 2006 19:55:00 +11° 16' 22"
03 Jun 2006 20:00:00 +10° 35' 35"

The rate of descent varies from 8' 41" to 8' 9" of arc for each elapsed
minute. The average is 8' 26" of arc per elapsed minute.

--
Mike Williams
Gentleman of Leisure

Download either
http://www.skymap.com/smp_eval.htm

http://www.stargazing.net/astropc/download.html

and 'model' away to your heart's content.



"Steve J" wrote in message
ups.com...
I hope that I am asking this question in the right place, so please
bear with me as a newbie!

I have been asked by a solicitor to find out at what rate the sun sets
in Coventry between 7pm and 8pm on 3rd June.

I guess the question is about angle of elevation above the horizon i.e.
angle of fall per time unit?

It's for a court case up and coming this month, so I would appreciate
some help please.

Thanks

Steve Jackson
Bablake Weather Station
Coventry UK
www.bablakeweather.co.uk

Mike Williams wrote:

Wasn't it Steve J who wrote:
I hope that I am asking this question in the right place, so please
bear with me as a newbie!

I have been asked by a solicitor to find out at what rate the sun sets
in Coventry between 7pm and 8pm on 3rd June.

Are these times in BST or GMT ? The 1 hour difference could be very
important.

I guess the question is about angle of elevation above the horizon i.e.
angle of fall per time unit?

It's for a court case up and coming this month, so I would appreciate
some help please.

Here's a list of values for the angle of elevation every 5 minutes

Date Time Altitude
03 Jun 2006 19:00:00 +19° 02' 16"
03 Jun 2006 19:05:00 +18° 18' 50"
03 Jun 2006 19:10:00 +17° 35' 35"
03 Jun 2006 19:15:00 +16° 52' 31"
03 Jun 2006 19:20:00 +16° 09' 39"
03 Jun 2006 19:25:00 +15° 27' 00"
03 Jun 2006 19:30:00 +14° 44' 35"
03 Jun 2006 19:35:00 +14° 02' 24"
03 Jun 2006 19:40:00 +13° 20' 28"
03 Jun 2006 19:45:00 +12° 38' 49"
03 Jun 2006 19:50:00 +11° 57' 26"
03 Jun 2006 19:55:00 +11° 16' 22"
03 Jun 2006 20:00:00 +10° 35' 35"

The rate of descent varies from 8' 41" to 8' 9" of arc for each elapsed
minute. The average is 8' 26" of arc per elapsed minute.

Are these corrected for refraction and height above sea level?

Refraction makes only a small difference for objects higher than 10
degrees, but becomes more significant for objects close to the horizon
(roughly half a degree shift in apparent position of the sun at
sunset).

This means nominal rising and setting times tabulated in the Nautical
Almanac typically use a working defnition for sunset that the upper
limb of the sun has a zenith angle of 90d 34'.

Regards,
Martin Brown

Steve J wrote:
I hope that I am asking this question in the right place, so please
bear with me as a newbie!

I have been asked by a solicitor to find out at what rate the sun sets
in Coventry between 7pm and 8pm on 3rd June.

I guess the question is about angle of elevation above the horizon i.e.
angle of fall per time unit?

It's for a court case up and coming this month, so I would appreciate
some help please.

Thanks

Steve Jackson
Bablake Weather Station
Coventry UK
www.bablakeweather.co.uk

Take a local observation of the sky color change and expanded it out to
a view of the Earth from space -

http://www.tech-writer.net/images/photos/SunsetSky1.jpg

http://www.aoml.noaa.gov/hrd/Storm_p...erminator1.JPG

http://upload.wikimedia.org/wikipedi...ss002_full.jpg

Now you have a proper perspective and recognise that the color change
is due to your location rotation into the Earth's orbital shadow and
has nothing to do with local geocentricobservations of the Sun rising
or setting.

The rate at which the Earth's axial rotation sweeps in and out of the
orbital shadow changes insofar as the orbital shadow/solar radiation
division changes at a different rate in accordance with Keplerian
orbital geometry *.It is a tricky business for people who are not
familiar with the dynamics involved and the answers so far are from
guys who assign the pseudo-dynamic of a variable tilt of the Earth to
the Sun.

You are looking for a geocentric answer for the rate of 'fall' and
this is not possible in any shape or form.



*
http://www.freewebs.com/maung4u/phot...cond%20law.jpg

Mike Williams wrote:
Wasn't it Steve J who wrote:

It was!!

And I would like to thank members of this esteemed newsgroup fpr their
help!

Cheers

Steve

Craig Oldfield verbally sodomised in
:

In article . com,
wrote in crayon on my screen...

I have been asked by a solicitor to find out at what rate the sun sets
in Coventry between 7pm and 8pm on 3rd June.

Can't help you with the answer

What's new?


--
Phil Kyle™

T
h i
i s
s l
f i l
S o n o
i u e n
g r s g

Phil Kyle wrote:
Craig Oldfield verbally sodomised in
:

In article . com,
wrote in crayon on my screen...

I have been asked by a solicitor to find out at what rate the sun sets
in Coventry between 7pm and 8pm on 3rd June.

The index of refraction for red is 1.000292 and that for blue is 1.000295. Out
of a total refraction of about 0.53°, the dispersion is only 0.006° or about
20 arc seconds, compared to a 120 arc sec resolution for the eye. Thus, it
makes little sense to dabble in prescience . . . .

Be. Here. Now.


Can't help you with the answer

What's new?

Cloned bovines.
--
ah