ASTRO: UGC 10822

UGC 10822 - Draco Dwarf Spheroidal Galaxy
Draco
Penryn, California
May 2009
FS-128 (ag, St-4)
ST-2000XM L 10 minute subs

UGC 10822 was discovered in 1954 by Albert Wilson at Lowell
Observatory, it is a companion to our galaxy at 263,000 light years.
It is classified as spheroidal, contains a population of older stars
and very little dust.

There are more than two hundred articles/studies on NASA/ADS related
to this galaxy.

Threre are numberous studies trying to identify, measure, etc. dark
matter in this galaxy.

We probably borrowed most of the dust and gas from this galaxy for use
in the Milky Way.

When stretched I see what could be a light dust lane from top to
bottom.

On 11/15/2010 12:44 PM, glen youman wrote:
UGC 10822 - Draco Dwarf Spheroidal Galaxy
Draco
Penryn, California
May 2009
FS-128 (ag, St-4)
ST-2000XM L 10 minute subs

UGC 10822 was discovered in 1954 by Albert Wilson at Lowell
Observatory, it is a companion to our galaxy at 263,000 light years.
It is classified as spheroidal, contains a population of older stars
and very little dust.

There are more than two hundred articles/studies on NASA/ADS related
to this galaxy.

Threre are numberous studies trying to identify, measure, etc. dark
matter in this galaxy.

We probably borrowed most of the dust and gas from this galaxy for use
in the Milky Way.

When stretched I see what could be a light dust lane from top to
bottom.

How many 10 minute subs? When I tried this one on a good night I got no
hint of the background oval glow or dust lane. I used 6 ten minute subs.

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

For luminance, I consider 12-10 minute subs a minimum for bright
objects. When a dim object attracts my attention and my imaging
plans allow I'll devote many more hours to the object. if plans don't
allow further data acquisition,the initial data will reside on my hard
disk until such time as I am able to add more.

Ten years ago, 4 exposures of 15 minutes or 20 minutes was minimun but
those days are history at this location.

To answer your question, 42 exposures calibrated and mean combined in
CCDstack and saved as 32 bit tif after ddp processing. Final
processing in CS3 (have since upgraded to CS5 -I don't recommend it).

Images were acquired over a three night period.



On Mon, 15 Nov 2010 15:27:24 -0600, Rick Johnson
wrote:

On 11/15/2010 12:44 PM, glen youman wrote:
UGC 10822 - Draco Dwarf Spheroidal Galaxy
Draco
Penryn, California
May 2009
FS-128 (ag, St-4)
ST-2000XM L 10 minute subs

UGC 10822 was discovered in 1954 by Albert Wilson at Lowell
Observatory, it is a companion to our galaxy at 263,000 light years.
It is classified as spheroidal, contains a population of older stars
and very little dust.

There are more than two hundred articles/studies on NASA/ADS related
to this galaxy.

Threre are numberous studies trying to identify, measure, etc. dark
matter in this galaxy.

We probably borrowed most of the dust and gas from this galaxy for use
in the Milky Way.

When stretched I see what could be a light dust lane from top to
bottom.

How many 10 minute subs? When I tried this one on a good night I got no
hint of the background oval glow or dust lane. I used 6 ten minute subs.

Rick

Great image Glen. You managed to show a galaxy and not just few stars as I
did some years ago.

Stefan



"glen youman" schrieb im Newsbeitrag
...
UGC 10822 - Draco Dwarf Spheroidal Galaxy
Draco
Penryn, California
May 2009
FS-128 (ag, St-4)
ST-2000XM L 10 minute subs

UGC 10822 was discovered in 1954 by Albert Wilson at Lowell
Observatory, it is a companion to our galaxy at 263,000 light years.
It is classified as spheroidal, contains a population of older stars
and very little dust.

There are more than two hundred articles/studies on NASA/ADS related
to this galaxy.

Threre are numberous studies trying to identify, measure, etc. dark
matter in this galaxy.

We probably borrowed most of the dust and gas from this galaxy for use
in the Milky Way.

When stretched I see what could be a light dust lane from top to
bottom.

42 vs my 6. That does explain it!
Rick

On 11/15/2010 8:42 PM, glen youman wrote:
For luminance, I consider 12-10 minute subs a minimum for bright
objects. When a dim object attracts my attention and my imaging
plans allow I'll devote many more hours to the object. if plans don't
allow further data acquisition,the initial data will reside on my hard
disk until such time as I am able to add more.

Ten years ago, 4 exposures of 15 minutes or 20 minutes was minimun but
those days are history at this location.

To answer your question, 42 exposures calibrated and mean combined in
CCDstack and saved as 32 bit tif after ddp processing. Final
processing in CS3 (have since upgraded to CS5 -I don't recommend it).

Images were acquired over a three night period.



On Mon, 15 Nov 2010 15:27:24 -0600, Rick
wrote:

On 11/15/2010 12:44 PM, glen youman wrote:
UGC 10822 - Draco Dwarf Spheroidal Galaxy
Draco
Penryn, California
May 2009
FS-128 (ag, St-4)
ST-2000XM L 10 minute subs

UGC 10822 was discovered in 1954 by Albert Wilson at Lowell
Observatory, it is a companion to our galaxy at 263,000 light years.
It is classified as spheroidal, contains a population of older stars
and very little dust.

There are more than two hundred articles/studies on NASA/ADS related
to this galaxy.

Threre are numberous studies trying to identify, measure, etc. dark
matter in this galaxy.

We probably borrowed most of the dust and gas from this galaxy for use
in the Milky Way.

When stretched I see what could be a light dust lane from top to
bottom.

How many 10 minute subs? When I tried this one on a good night I got no
hint of the background oval glow or dust lane. I used 6 ten minute subs.

Rick