Date   
Re: Sharpless 141

Bernard Miller
 

Dan,

 

Another beautiful faint fuzzy. Thanks for sharing.

 

Bernard

 

 

From: DarkSkyNewMexico@groups.io On Behalf Of Dan Crowson
Sent: Saturday, September 21, 2019 7:13 PM
To: 'Dan Crowson' <dcrowson@...>
Subject: [DarkSkyNewMexico] Sharpless 141

 

Sharpless 141 (LBN 509) is a faint nebula located approximately 23,000 light-years away in Cepheus. The stars on the left side of the nebula are cataloged as open cluster Teutsch 76

 

Ha – 24x1800s – 720 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

840 minutes total exposure – 14 hours

 

Imaged over five nights in September, 2017 and September and October, 2018 at Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

HaRGB - https://www.flickr.com/photos/dcrowson/48772632421/sizes/l

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 


Virus-free. www.avast.com

Re: Rosette 4 panel mosaic

Bernard Miller
 

Beautiful Madhup. What do you use to stitch the mosaic?

 

Bernard

 

 

From: DarkSkyNewMexico@groups.io On Behalf Of Madhup Rathi
Sent: Tuesday, September 24, 2019 9:19 PM
To: DarkSkyNewMexico@groups.io
Subject: [DarkSkyNewMexico] Rosette 4 panel mosaic

 

Hello all,

 

A 4 panel mosaic. Each set was taken for a total of 13 images of Luminance of 0 minutes each; 13 images of Ha (Hydrogen Alpha) of 20 minutes each; 7 images of each color of 5 minutes each for each panel. Making it a total of 33 hours on the image. Stacked and Mosaiced in Maxim DL and processed in Pixinsight.

 

Madhup

 


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vdB 144

Gregg Ruppel
 

Hi all:

vdB 144 (van den Bergh) is a tenuous reflection nebula surrounding a 6th magnitude star in Cygnus:
http://www.greggsastronomy.com/IMAGES/vdB144-LRGB.jpg
In the lower left quadrant is NGC 7127, an open cluster consisting of just 12 stars.
Image data here:
http://www.greggsastronomy.com/vdB144.html

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site
http://www.greggsastronomy.com/

Two comets

Gregg Ruppel
 

Hi all:
Two comets are currently visible (in moderate sized scopes) in the evening sky - they both are sporting tails:

c2018 W2 Africano
http://www.greggsastronomy.com/IMAGES/c2018-W2-Africano-LRGB_092719.jpg

c2018 N2 ASASSN
http://www.greggsastronomy.com/IMAGES/c2018-N2-ASASSN-LRGB_092719.jpg

40 minutes total exposure for each.

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site
http://www.greggsastronomy.com/

Re: Rosette 4 panel mosaic

Madhup Rathi
 

Thanks, Bernard. I stack individual panels and then stitch them in mono in Maxim DL6. Then, use Pixinsight as usual. Pixinsight mosaic procedure is too cumbersome.

 

From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Bernard Miller
Sent: Saturday, September 28, 2019 6:10 PM
To: DarkSkyNewMexico@groups.io
Subject: Re: [DarkSkyNewMexico] Rosette 4 panel mosaic

 

Beautiful Madhup. What do you use to stitch the mosaic?

 

Bernard

 

 

From: DarkSkyNewMexico@groups.io On Behalf Of Madhup Rathi
Sent: Tuesday, September 24, 2019 9:19 PM
To: DarkSkyNewMexico@groups.io
Subject: [DarkSkyNewMexico] Rosette 4 panel mosaic

 

Hello all,

 

A 4 panel mosaic. Each set was taken for a total of 13 images of Luminance of 0 minutes each; 13 images of Ha (Hydrogen Alpha) of 20 minutes each; 7 images of each color of 5 minutes each for each panel. Making it a total of 33 hours on the image. Stacked and Mosaiced in Maxim DL and processed in Pixinsight.

 

Madhup

 

 

Virus-free. www.avast.com

Re: Two comets

Madhup Rathi
 

Very nice, Gregg. What are the lengths of individual subs.

-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Gregg Ruppel
Sent: Saturday, September 28, 2019 7:22 PM
To: Eureka Observers Club <EurekaObsClub@...>; St. LouisAstronomy <STLAstronomy@...>; ASEMDigitalSIG <ASEMDigitalSIG@groups.io>; taaaforum@...; DSNM <DarkSkyNewMexico@groups.io>
Subject: [DarkSkyNewMexico] Two comets

Hi all:
Two comets are currently visible (in moderate sized scopes) in the evening sky - they both are sporting tails:

c2018 W2 Africano
http://www.greggsastronomy.com/IMAGES/c2018-W2-Africano-LRGB_092719.jpg

c2018 N2 ASASSN
http://www.greggsastronomy.com/IMAGES/c2018-N2-ASASSN-LRGB_092719.jpg

40 minutes total exposure for each.

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/

Re: Two comets

Gregg Ruppel
 

60 seconds for W2; 120 seconds for N2.

Gregg

Visit my astronomy & astrophotography site
www.greggsastronomy.com

On Sep 28, 2019, at 5:27 PM, Madhup Rathi <madhup@...> wrote:

Very nice, Gregg. What are the lengths of individual subs.

-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Gregg Ruppel
Sent: Saturday, September 28, 2019 7:22 PM
To: Eureka Observers Club <EurekaObsClub@...>; St. LouisAstronomy <STLAstronomy@...>; ASEMDigitalSIG <ASEMDigitalSIG@groups.io>; taaaforum@...; DSNM <DarkSkyNewMexico@groups.io>
Subject: [DarkSkyNewMexico] Two comets

Hi all:
Two comets are currently visible (in moderate sized scopes) in the evening sky - they both are sporting tails:

c2018 W2 Africano
http://www.greggsastronomy.com/IMAGES/c2018-W2-Africano-LRGB_092719.jpg

c2018 N2 ASASSN
http://www.greggsastronomy.com/IMAGES/c2018-N2-ASASSN-LRGB_092719.jpg

40 minutes total exposure for each.

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/







Re: Two comets

Dan Crowson
 

Madhup,

Exposure length on these is dependent on your equipment (arcsec/pixel ratio). If you wanted to give me yours, I can give you the max exposure length you can do before seeing trailing. This assumes 1 arcsec seeing so you can go longer if you want but results vary.

The formula I use (just have it in excel)is:

([arsec/pixel ratio]/([higher of the movement in RA or Dec - arsecs/sec out of TheSkyX] * 60)) * 60

As Gregg mentioned, Africano is close so moving much quicker than ASASSN.

Dan
----
Dan Crowson dcrowson@...
Dardenne Prairie MO http://www.crowson.com

-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Madhup Rathi
Sent: Saturday, September 28, 2019 7:27 PM
To: DarkSkyNewMexico@groups.io; 'Eureka Observers Club' <EurekaObsClub@...>; 'St. LouisAstronomy' <STLAstronomy@...>; 'ASEMDigitalSIG' <ASEMDigitalSIG@groups.io>; taaaforum@...
Subject: Re: [DarkSkyNewMexico] Two comets

Very nice, Gregg. What are the lengths of individual subs.

-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Gregg Ruppel
Sent: Saturday, September 28, 2019 7:22 PM
To: Eureka Observers Club <EurekaObsClub@...>; St. LouisAstronomy <STLAstronomy@...>; ASEMDigitalSIG <ASEMDigitalSIG@groups.io>; taaaforum@...; DSNM <DarkSkyNewMexico@groups.io>
Subject: [DarkSkyNewMexico] Two comets

Hi all:
Two comets are currently visible (in moderate sized scopes) in the evening sky - they both are sporting tails:

c2018 W2 Africano
http://www.greggsastronomy.com/IMAGES/c2018-W2-Africano-LRGB_092719.jpg

c2018 N2 ASASSN
http://www.greggsastronomy.com/IMAGES/c2018-N2-ASASSN-LRGB_092719.jpg

40 minutes total exposure for each.

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/

Re: Two comets

Madhup Rathi
 

My arcsec/pixel ratio is 0.68" per pixel. (QSI 683 wsg is 5.4 micron and AG Optical 10" is 1650 mm.)

Thanks for your help.

-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Dan Crowson
Sent: Saturday, September 28, 2019 8:36 PM
To: DarkSkyNewMexico@groups.io
Subject: Re: [DarkSkyNewMexico] Two comets

Madhup,

Exposure length on these is dependent on your equipment (arcsec/pixel ratio). If you wanted to give me yours, I can give you the max exposure length you can do before seeing trailing. This assumes 1 arcsec seeing so you can go longer if you want but results vary.

The formula I use (just have it in excel)is:

([arsec/pixel ratio]/([higher of the movement in RA or Dec - arsecs/sec out of TheSkyX] * 60)) * 60

As Gregg mentioned, Africano is close so moving much quicker than ASASSN.

Dan
----
Dan Crowson dcrowson@...
Dardenne Prairie MO http://www.crowson.com


-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Madhup Rathi
Sent: Saturday, September 28, 2019 7:27 PM
To: DarkSkyNewMexico@groups.io; 'Eureka Observers Club' <EurekaObsClub@...>; 'St. LouisAstronomy' <STLAstronomy@...>; 'ASEMDigitalSIG' <ASEMDigitalSIG@groups.io>; taaaforum@...
Subject: Re: [DarkSkyNewMexico] Two comets

Very nice, Gregg. What are the lengths of individual subs.

-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Gregg Ruppel
Sent: Saturday, September 28, 2019 7:22 PM
To: Eureka Observers Club <EurekaObsClub@...>; St. LouisAstronomy <STLAstronomy@...>; ASEMDigitalSIG <ASEMDigitalSIG@groups.io>; taaaforum@...; DSNM <DarkSkyNewMexico@groups.io>
Subject: [DarkSkyNewMexico] Two comets

Hi all:
Two comets are currently visible (in moderate sized scopes) in the evening sky - they both are sporting tails:

c2018 W2 Africano
http://www.greggsastronomy.com/IMAGES/c2018-W2-Africano-LRGB_092719.jpg

c2018 N2 ASASSN
http://www.greggsastronomy.com/IMAGES/c2018-N2-ASASSN-LRGB_092719.jpg

40 minutes total exposure for each.

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/

Re: Two comets

Dan Crowson
 

ASASSN - around 35 seconds 1x1
Africano - around 5 seconds 1x1

(these are the rates for tonight - 2019-09-28)
----
Dan Crowson dcrowson@...
Dardenne Prairie MO http://www.crowson.com

-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Madhup Rathi
Sent: Saturday, September 28, 2019 8:07 PM
To: DarkSkyNewMexico@groups.io
Subject: Re: [DarkSkyNewMexico] Two comets

My arcsec/pixel ratio is 0.68" per pixel. (QSI 683 wsg is 5.4 micron and AG Optical 10" is 1650 mm.)

Thanks for your help.

-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Dan Crowson
Sent: Saturday, September 28, 2019 8:36 PM
To: DarkSkyNewMexico@groups.io
Subject: Re: [DarkSkyNewMexico] Two comets

Madhup,

Exposure length on these is dependent on your equipment (arcsec/pixel ratio). If you wanted to give me yours, I can give you the max exposure length you can do before seeing trailing. This assumes 1 arcsec seeing so you can go longer if you want but results vary.

The formula I use (just have it in excel)is:

([arsec/pixel ratio]/([higher of the movement in RA or Dec - arsecs/sec out of TheSkyX] * 60)) * 60

As Gregg mentioned, Africano is close so moving much quicker than ASASSN.

Dan
----
Dan Crowson dcrowson@...
Dardenne Prairie MO http://www.crowson.com


-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Madhup Rathi
Sent: Saturday, September 28, 2019 7:27 PM
To: DarkSkyNewMexico@groups.io; 'Eureka Observers Club' <EurekaObsClub@...>; 'St. LouisAstronomy' <STLAstronomy@...>; 'ASEMDigitalSIG' <ASEMDigitalSIG@groups.io>; taaaforum@...
Subject: Re: [DarkSkyNewMexico] Two comets

Very nice, Gregg. What are the lengths of individual subs.

-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Gregg Ruppel
Sent: Saturday, September 28, 2019 7:22 PM
To: Eureka Observers Club <EurekaObsClub@...>; St. LouisAstronomy <STLAstronomy@...>; ASEMDigitalSIG <ASEMDigitalSIG@groups.io>; taaaforum@...; DSNM <DarkSkyNewMexico@groups.io>
Subject: [DarkSkyNewMexico] Two comets

Hi all:
Two comets are currently visible (in moderate sized scopes) in the evening sky - they both are sporting tails:

c2018 W2 Africano
http://www.greggsastronomy.com/IMAGES/c2018-W2-Africano-LRGB_092719.jpg

c2018 N2 ASASSN
http://www.greggsastronomy.com/IMAGES/c2018-N2-ASASSN-LRGB_092719.jpg

40 minutes total exposure for each.

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/

Re: Two comets

Brian Ottum
 

Great to see comets again after a drought!

-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Gregg Ruppel
Sent: Saturday, September 28, 2019 7:22 PM
To: Eureka Observers Club <EurekaObsClub@...>; St. LouisAstronomy <STLAstronomy@...>; ASEMDigitalSIG <ASEMDigitalSIG@groups.io>; taaaforum@...; DSNM <DarkSkyNewMexico@groups.io>
Subject: [DarkSkyNewMexico] Two comets

Hi all:
Two comets are currently visible (in moderate sized scopes) in the evening sky - they both are sporting tails:

c2018 W2 Africano
http://www.greggsastronomy.com/IMAGES/c2018-W2-Africano-LRGB_092719.jpg

c2018 N2 ASASSN
http://www.greggsastronomy.com/IMAGES/c2018-N2-ASASSN-LRGB_092719.jpg

40 minutes total exposure for each.

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/

vdB 151

Gregg Ruppel
 

Hi all:
Continuing my trek through the van den Bergh catalog of reflection nebulae, here is vdB 151.  This is another faint nebula around a bright star, in this case BNU 8, a 4.5 magnitude double in the constellation Lacerta.  The nebula has some fine tendrils just north of the star.
http://www.greggsastronomy.com/IMAGES/vdB151-LRGB.jpg

BNU 8 is a K3III spectral class star about 563 Ly distant, with a luminosity of approximately 383 x the sun.

Image data here:
http://www.greggsastronomy.com/vdB151.html

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site
http://www.greggsastronomy.com/

Arp 56

Dan Crowson
 

Arp 56 consists of UGC 1432 (PGC 7359, VV 12 and others) the larger spiral interacting with PGC 212878. In Arp’s, “Spiral galaxies with companions on arms – high surface brightness companions” class, these are located approximately 350 million light-years away in Aries.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

360 minutes total exposure – 6 hours

 

Imaged September 27th and 29th, 2019 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/48832751121/sizes/l/


Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

NGC 7492

Dan Crowson
 

NGC 7492 is a Shapley-Sawyer class XII (http://en.wikipedia.org/wiki/Shapley%E2%80%93Sawyer_Concentration_Class) globular cluster located approximately 84,000 light-years away in Aquarius.

 

Luminance – 12x600s – 120 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

240 minutes total exposure – 4 hours

 

Imaged September 26th, 2019 at Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG ST-8300M on an Astro-Tech AT90DT at f/6.7 603mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/48832517633/sizes/l/

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

M23

Dan Crowson
 

M23 (NGC 6494 and others) is a trumpler (https://en.wikipedia.org/wiki/Trumpler_classification) class I 2 r open cluster located approximately 2150 light-years away in Sagittarius.

 

I also caught asteroid 74 Galatea while capturing the luminance. The trail can be found under a star on the left side of the image just below center.

 

Luminance – 12x600s – 120 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

240 minutes total exposure – 4 hours

 

Imaged September 26th and 27th, 2019 at Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG ST-8300M on an Astro-Tech AT90DT at f/6.7 603mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/48838474107/sizes/l/

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Arp 169

Dan Crowson
 

Arp 169 consists of (north to south) NGC 7236 (UGC 11598, VV 1934a and many others), NGC 7237 and NGC 7237C (2MASX J22144877+1350006 and others). Part of Arp’s Galaxies (not classifiable as S or E) with diffuse counter tails class, these appear to be located approximately 340 million light-years away in Pegasus.

 

The spiral with a bright core below Arp 169 is PGC 68368.

 

Luminance – 24x600s – 240 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

360 minutes total exposure – 6 hours

 

Imaged September 27th, 28th and 29th, 2019 from Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG STF-8300M on an Astro-Tech AT12RCT at f/8 2432mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/48839687136/sizes/l/

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Re: M23

Gregg Ruppel
 

Beautiful!  Thanks for sharing.

Clear skies,
Gregg




On Oct 3, 2019, at 3:30 PM, Dan Crowson <dcrowson@...> wrote:

M23 (NGC 6494 and others) is a trumpler (https://en.wikipedia.org/wiki/Trumpler_classification) class I 2 r open cluster located approximately 2150 light-years away in Sagittarius.

 

I also caught asteroid 74 Galatea while capturing the luminance. The trail can be found under a star on the left side of the image just below center.

 

Luminance – 12x600s – 120 minutes – binned 1x1

RGB – 8x300s – 40 minutes each – binned 2x2

 

240 minutes total exposure – 4 hours

 

Imaged September 26th and 27th, 2019 at Dark Sky New Mexico at Rancho Hidalgo (Animas, New Mexico) with a SBIG ST-8300M on an Astro-Tech AT90DT at f/6.7 603mm.

 

LRGB - https://www.flickr.com/photos/dcrowson/48838474107/sizes/l/

 

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Static Internet Down

Dan Crowson
 

It looks like the static Internet side went down around 8:18 PM tonight. I tried to reach out to a couple of people on site but haven’t heard anything. Anyone else reach out and/or have any status?

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

Re: Static Internet Down

Brian Ottum
 

My webcam went down at 8:11pm MDT tonight.


Brian Ottum
734-260-0597 mobile


-----Original Message-----

From: dcrowson@...
To: nmhokie1@...
Cc: DarkSkyNewMexico@groups.io
Sent: 2019-10-07 10:51:39 PM
Subject: [DarkSkyNewMexico] Static Internet Down

It looks like the static Internet side went down around 8:18 PM tonight. I tried to reach out to a couple of people on site but haven’t heard anything. Anyone else reach out and/or have any status?

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 



Re: Static Internet Down - Up Now

Dan Crowson
 

9:28 PM – Internet just came back up.


Dan

 

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com

 

From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Dan Crowson
Sent: Monday, October 07, 2019 9:52 PM
To: nmhokie1@...
Cc: DarkSkyNewMexico@groups.io
Subject: [DarkSkyNewMexico] Static Internet Down

 

It looks like the static Internet side went down around 8:18 PM tonight. I tried to reach out to a couple of people on site but haven’t heard anything. Anyone else reach out and/or have any status?

Dan

----          
Dan Crowson                          dcrowson@...
Dardenne Prairie MO               http://www.crowson.com