Machholz tail disappearing act?

If you have an image of Machholz taken on the night of 2005 Jan 08/09,
can you post the image details together with a statement as to whether
or not you picked up the tail?

Post the date+time, exposure time, ISO value (if applicable), focal
length and focal ratio. Additional information would be the sky
clarity.

Here's mine:

2005/01/08, 18h42m UT, 120s, ISO1600, 200mm, f/5.6, thin veiled cloud,
tail faint but visible.

--
Pete
http://www.digitalsky.org.uk
Global Projects - http://www.globalobservers.net

Pete Lawrence wrote:

If you have an image of Machholz taken on the night of 2005 Jan 08/09,
can you post the image details together with a statement as to whether
or not you picked up the tail?

Post the date+time, exposure time, ISO value (if applicable), focal
length and focal ratio. Additional information would be the sky
clarity.


Pete,

Here's mine:

2005/01/08, 18h42m UT, 120s, ISO1600, 200mm, f/5.6, thin veiled cloud,
tail faint but visible.

I spent probably close to an hour last night searching for the tail
using a variety of exposures but no luck. My CCD effort from last night
is available here with complete details:
http://www.astrovox.gr/forum/album_pic.php?pic_id=374 .... a snmall
correction to the imaging details involves the Luminance layer (5
integrations and not 10) used for the final image.

My test image from four days earlier for comparison purposes is
available at http://www.perseus.gr/Astro-Comets-2004-Q2-Machholz.htm .

Anthony.

On Sun, 09 Jan 2005 15:33:40 +0000, Pete Lawrence
wrote:

If you have an image of Machholz taken on the night of 2005 Jan 08/09,
can you post the image details together with a statement as to whether
or not you picked up the tail?

Post the date+time, exposure time, ISO value (if applicable), focal
length and focal ratio. Additional information would be the sky
clarity.

http://www.cloudbait.com/gallery/comet/machholz.html

2005.01.08 03:11 UT. Imaged with Canon 300D, 300 seconds, ISO 800, 55mm lens @
f/7.1. The sky was hazy, 5/10. Both tails were visible, in the image and in 8x50
binoculars.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

Oops, sorry, that was actually the night of the 7/8 for me. I didn't image on
the 8/9, although I did see some tail visually with the binoculars. It looked
about the same as the night before, when I got the image.

_________________________________________________

Chris L Peterson
Cloudbait Observatory
http://www.cloudbait.com

Chris L Peterson wrote:

On Sun, 09 Jan 2005 15:33:40 +0000, Pete Lawrence
wrote:

If you have an image of Machholz taken on the night of 2005 Jan 08/09,
can you post the image details together with a statement as to whether
or not you picked up the tail?

Post the date+time, exposure time, ISO value (if applicable), focal
length and focal ratio. Additional information would be the sky
clarity.

http://www.cloudbait.com/gallery/comet/machholz.html

2005.01.08 03:11 UT. Imaged with Canon 300D, 300 seconds, ISO 800, 55mm
lens @ f/7.1. The sky was hazy, 5/10. Both tails were visible, in the
image and in 8x50 binoculars.

Oh, that's a lovely picture. Well done sir!

I don't suppose you have a hi-res version, do you?

Jim
--
AIM/iSight:JCAndrew2 - Log in and say 'hi'
"We deal in the moral equivalent of black holes, where the normal
laws of right and wrong break down; beyond those metaphysical
event horizons there exist ... special circumstances" - Use Of Weapons

On Sun, 09 Jan 2005 15:33:40 +0000, Pete Lawrence wrote:

If you have an image of Machholz taken on the night of 2005 Jan 08/09,
can you post the image details together with a statement as to whether
or not you picked up the tail?

Post the date+time, exposure time, ISO value (if applicable), focal
length and focal ratio. Additional information would be the sky
clarity.

Here's mine:

2005/01/08, 18h42m UT, 120s, ISO1600, 200mm, f/5.6, thin veiled cloud,
tail faint but visible.


Sir:

Tail was barely visible from a dark site (image shows stars down
to mag 13.5) on the 8th. (five minute piggyback)

http://www.softwaregod.com/jmi/M45_and_Machholz.html

On Sun, 09 Jan 2005 22:45:58 -0600, Doug Haseltine
wrote:

Tail was barely visible from a dark site (image shows stars down
to mag 13.5) on the 8th. (five minute piggyback)

http://www.softwaregod.com/jmi/M45_and_Machholz.html

Doug, what time was the image taken?

--
Pete
http://www.digitalsky.org.uk
Global Projects - http://www.globalobservers.net

snip

On Mon, 10 Jan 2005 07:44:11 +0000, Pete Lawrence wrote:

Doug, what time was the image taken?


Sir:

From near the OK/TX border at N 33.8 W 97.4 in a range from
Jan 9 3:48 UTC through 4:03 UTC.