ASTRO: Tiny Barnard 105

Barnard 105/LDN 506 is a small, dark nebula less than one minute of arc
across located one degree southwest of M 11 in Scutum. I find virtually
nothing on it. A general estimate of the typical distance to Scutum
dark nebula is about 650 light-years. I have no idea if that is
accurate in this case. The bright star on the southwest edge is BD -7
4710 a 9th magnitude star. It is located just about 5 minutes of arc
north of the center of the Geostationary Satellite Belt. Thus put
dozens of satellite trails running horizontally though the image plus
one polar satellite trail that was very bright through the image. With
only 2 subs for each color they had to be removed manually in Photoshop.
Not a fun task with several dozen to remove. Some very faint ones
remain but you have to look very carefully to find them. After the work
to remove the major ones over several hours I just gave up on the
faintest ones.

According to RegiStar there are 27,223 clearly identifiable stars in the
image in case you were wondering.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME

Rick
--
Prefix is correct. Domain is arvig dot net

I forgot to mention the very blue 7" of arc planetary nebula, PK
026-02.1, located to the west (right) of Barnard 105. Nor did I include
the annotated image to point it out. Trying again.

Rick

On 3/1/2014 12:04 AM, Rick Johnson wrote:
Barnard 105/LDN 506 is a small, dark nebula less than one minute of arc
across located one degree southwest of M 11 in Scutum. I find virtually
nothing on it. A general estimate of the typical distance to Scutum
dark nebula is about 650 light-years. I have no idea if that is
accurate in this case. The bright star on the southwest edge is BD -7
4710 a 9th magnitude star. It is located just about 5 minutes of arc
north of the center of the Geostationary Satellite Belt. Thus put
dozens of satellite trails running horizontally though the image plus
one polar satellite trail that was very bright through the image. With
only 2 subs for each color they had to be removed manually in Photoshop.
Not a fun task with several dozen to remove. Some very faint ones
remain but you have to look very carefully to find them. After the work
to remove the major ones over several hours I just gave up on the
faintest ones.

According to RegiStar there are 27,223 clearly identifiable stars in the
image in case you were wondering.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME

Rick


--
Prefix is correct. Domain is arvig dot net

Rick,

that must be one of the smallest dark nebulae in Barnard's catalogue.
Nicely situated in a splendid starfield.

Stefan


"Rick Johnson" schrieb im Newsbeitrag
...

Barnard 105/LDN 506 is a small, dark nebula less than one minute of arc
across located one degree southwest of M 11 in Scutum. I find virtually
nothing on it. A general estimate of the typical distance to Scutum
dark nebula is about 650 light-years. I have no idea if that is
accurate in this case. The bright star on the southwest edge is BD -7
4710 a 9th magnitude star. It is located just about 5 minutes of arc
north of the center of the Geostationary Satellite Belt. Thus put
dozens of satellite trails running horizontally though the image plus
one polar satellite trail that was very bright through the image. With
only 2 subs for each color they had to be removed manually in Photoshop.
Not a fun task with several dozen to remove. Some very faint ones
remain but you have to look very carefully to find them. After the work
to remove the major ones over several hours I just gave up on the
faintest ones.

According to RegiStar there are 27,223 clearly identifiable stars in the
image in case you were wondering.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME

Rick
--
Prefix is correct. Domain is arvig dot net

Rick,

thanks for pointing this one out. Even harder to spot than Lilge1 ;-)

Stefan


"Rick Johnson" schrieb im Newsbeitrag
...

I forgot to mention the very blue 7" of arc planetary nebula, PK
026-02.1, located to the west (right) of Barnard 105. Nor did I include
the annotated image to point it out. Trying again.

Rick

On 3/1/2014 12:04 AM, Rick Johnson wrote:
Barnard 105/LDN 506 is a small, dark nebula less than one minute of arc
across located one degree southwest of M 11 in Scutum. I find virtually
nothing on it. A general estimate of the typical distance to Scutum
dark nebula is about 650 light-years. I have no idea if that is
accurate in this case. The bright star on the southwest edge is BD -7
4710 a 9th magnitude star. It is located just about 5 minutes of arc
north of the center of the Geostationary Satellite Belt. Thus put
dozens of satellite trails running horizontally though the image plus
one polar satellite trail that was very bright through the image. With
only 2 subs for each color they had to be removed manually in Photoshop.
Not a fun task with several dozen to remove. Some very faint ones
remain but you have to look very carefully to find them. After the work
to remove the major ones over several hours I just gave up on the
faintest ones.

According to RegiStar there are 27,223 clearly identifiable stars in the
image in case you were wondering.

14" LX200R @ f/10, L=4x10' RGB=2x10', STL-11000XM, Paramount ME

Rick


--
Prefix is correct. Domain is arvig dot net