Early evening shots March 1st 2006

Some shots from the evening of March 1st 2006

Moon & Mercury
http://www.digitalsky.org.uk/2006-03-01/moon-mer.html

Earthshine
http://www.digitalsky.org.uk/2006-03-01/earthshine.html

Crepuscular rays (hey clouds can be beautiful too! ;-) )
http://www.digitalsky.org.uk/2006-03...epuscular.html

--
Pete
http://www.digitalsky.org.uk

In article ,
says...
Some shots from the evening of March 1st 2006

Moon & Mercury
http://www.digitalsky.org.uk/2006-03-01/moon-mer.html

Earthshine
http://www.digitalsky.org.uk/2006-03-01/earthshine.html

Crepuscular rays (hey clouds can be beautiful too! ;-) )
http://www.digitalsky.org.uk/2006-03...epuscular.html


Excellent as usual Pete.
--
Craig Oldfield

In ,
Pete Lawrence typed:
Some shots from the evening of March 1st 2006

Earthshine
http://www.digitalsky.org.uk/2006-03-01/earthshine.html


Excellent, as usual.

In the earthshine shot there is something close to the moon at about the
5.00 o'clock position. Is it a star, artifact or what ?

Jo

On Thu, 2 Mar 2006 15:06:06 +0000 (UTC), "Jo"
wrote:

In ,
Pete Lawrence typed:
Some shots from the evening of March 1st 2006

Earthshine
http://www.digitalsky.org.uk/2006-03-01/earthshine.html


Excellent, as usual.

In the earthshine shot there is something close to the moon at about the
5.00 o'clock position. Is it a star, artifact or what ?

Hi Jo, I've just looked it up and it would appear to be TYC2-1641-1
mag. +6.2. The one a bit further out is TYC2-1154-1, mag +7.0.
--
Pete Lawrence
http://www.digitalsky.org.uk
Last updated 4th February 2006

Originally Posted by Pete Lawrence

Some shots from the evening of March 1st 2006

Moon & Mercury
http://www.digitalsky.org.uk/2006-03-01/moon-mer.html

Earthshine
http://www.digitalsky.org.uk/2006-03-01/earthshine.html

Crepuscular rays (hey clouds can be beautiful too! ;-) )
http://www.digitalsky.org.uk/2006-03...epuscular.html

--
Pete
http://www.digitalsky.org.uk

Nice pics Pete! Viewed Mercury last few nights and last night the crescent moon too with pic via my vintage B&L 6000 SCT at http://www.cloudynights.com/photopos...on060301mg.jpg
Tiny Mercury phase just discernable at lowly altitude via B&L -see http://www.astrobuysell.com/uk/propview.php?view=5247 as part of my observatory clearance.

Nytecam 51N 0.1W

Pete Lawrence wrote:
Some shots from the evening of March 1st 2006
snip
Earthshine
http://www.digitalsky.org.uk/2006-03-01/earthshine.html

Gotta love this internet and instant international communication!

Your Earthshine picture is dated 2006-03-01 18:56 UTC and has a post
timestamp of 2006-03-02 00:33 UTC. I really enjoyed the picture of the
new crescent Moon, but then didn't give it much thought further
thought.

I live half-way around the world from you at long 111 West. At about
2006-03-02 02:30 UTC, I was driving around and hap-hazardously glanced
to west. There was your picture - um, I mean the Moon - setting on the
west horizon.

Thanks - Canopus56

"Alan LeHun" wrote in message
...
In article . com,
says...
Some shots from the evening of March 1st 2006
Earthshine
http://www.digitalsky.org.uk/2006-03-01/earthshine.html

Those are stars visible in the background, correct?
At what phase would the moon's brightness make
them not show up in photographs?


The exposure for that shot was such that the Earthshine could be imaged.
A whole 1 second with very fast film. Look at how bleached the actual
crescent is. Had the shot been taken with an exposure to show the
crescent then the crescent would be all that was visible. It's not a
question of brightness per se but of exposure.

IOW it is already too bright to show the stars if it is the sunlight
side you want to image.


I just did a quick back of the envelope calculation. It looks like the
surface brightness of the illuminated moon is roughly the same as a 0
magnitude star assuming 3arcsec seeing. Given that the minimum detectable
in an image is say 1/100 th of that value, that would suggest that it should
be possible to detect a mag 5 star with a correctly exposed moon. This
assumes though that the scale is such that the star covers at least one
pixel, which is probably not the case in Pete's image

Robin

On 2 Mar 2006 11:43:07 -0800, "Father Haskell"
wrote:

Pete Lawrence wrote:
Some shots from the evening of March 1st 2006
Earthshine
http://www.digitalsky.org.uk/2006-03-01/earthshine.html

Those are stars visible in the background, correct?

Yes they are...

Close one is TYC2-1641-1 mag. +6.2. The one a bit further out is
TYC2-1154-1, mag +7.0.

At what phase would the moon's brightness make
them not show up in photographs?

I presume you mean at the expense of the lunar detail. It's possible
to pick up quite a few stars so long as the Moon's flare doesn't wash
them out.

Here's another Earthshine shot showing stars - some close to the
bright overexposed crescent...

http://www.digitalsky.org.uk/lunar/2...arthshine.html

....and there are quite a few visible on the top picture here too...

http://www.digitalsky.org.uk/Widefield/saturn_m44.html

--
Pete Lawrence
http://www.digitalsky.org.uk
Last updated 4th February 2006

On Thu, 02 Mar 2006 21:32:02 +0000, Pete Lawrence
wrote:

On 2 Mar 2006 11:43:07 -0800, "Father Haskell"
wrote:

Pete Lawrence wrote:
Some shots from the evening of March 1st 2006
Earthshine
http://www.digitalsky.org.uk/2006-03-01/earthshine.html

Those are stars visible in the background, correct?

Yes they are...

Close one is TYC2-1641-1 mag. +6.2. The one a bit further out is
TYC2-1154-1, mag +7.0.

At what phase would the moon's brightness make
them not show up in photographs?

I presume you mean at the expense of the lunar detail. It's possible
to pick up quite a few stars so long as the Moon's flare doesn't wash
them out.

Here's another Earthshine shot showing stars - some close to the
bright overexposed crescent...

http://www.digitalsky.org.uk/lunar/2...arthshine.html

In fact, if you look very close to the bright over-exposed limb, just
below the central axis, you can just make out a dot really close in.
This is TYC15-764-1 a magniutude +9.0 star in Pisces.
--
Pete Lawrence
http://www.digitalsky.org.uk
Last updated 4th February 2006

"Pete Lawrence" wrote in message
...
Some shots from the evening of March 1st 2006

Moon & Mercury
http://www.digitalsky.org.uk/2006-03-01/moon-mer.html

Earthshine
http://www.digitalsky.org.uk/2006-03-01/earthshine.html

Crepuscular rays (hey clouds can be beautiful too! ;-) )
http://www.digitalsky.org.uk/2006-03...epuscular.html

--
Pete
http://www.digitalsky.org.uk

Fabulous earthshine shot Pete. I was actually watching through 12 x 80 bins
the same evening. Was the best "earthlight" I've seen and could make out the
major marias quite clearly.. Thanks for the reminder!

;o)

Laurence