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Contains:  NGC 6384
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NGC6384 Spiral Galaxy, 



    
        

            niteman1946
NGC6384 Spiral Galaxy
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NGC6384 Spiral Galaxy

Technical card


Dates:Aug. 18, 2019Aug. 19, 2019Aug. 20, 2019Aug. 21, 2019Aug. 25, 2019Aug. 26, 2019

Frames:
Astronomik B 1.25" Type IIc: 30x300" -10C bin 1x1
Astronomik G 1.25" Type IIc: 27x300" -10C bin 1x1
Astronomik L 1.25" Type IIc: 41x600" -10C bin 1x1
Astronomik R 1.25" Type IIc: 30x300" -10C bin 1x1

Integration: 14.1 hours

Darks: ~30

Flats: ~30

Bias: ~100

Avg. Moon age: 20.71 days

Avg. Moon phase: 63.27%


Basic astrometry details

Astrometry.net job: 2883470

RA center: 17h 32' 24"

DEC center: +7° 3' 7"

Pixel scale: 0.511 arcsec/pixel

Orientation: 358.773 degrees

Field radius: 0.286 degrees


Resolution: 3239x2394

Locations: Lighthouse Observatory, Burleson, Texas, United States

Data source: Backyard

Description

NGC 6384 is an intermediate barred spiral galaxy located about 77 million light-years away in the northern part of the constellation Ophiuchus. It's morphological classification indicates that it is a weakly barred galaxy (SAB) with an inner ring structure (r) orbiting the bar, and moderate to loosely wound spiral arms (bc). The galaxy is inclined by an angle of 47° to the line of sight, along a position angle of 40°. The estimated mass of the stars in this galaxy is 105 billion times the mass of the Sun.
At one time NGC 6384 was considered a normal galaxy with no activity in the nucleus. However, it is now classified as a transition object (T2), which is thought to be a LINER-type galaxy whose emission-line spectra is contaminated by H II regions in the nucleus.
On 24 June 1971, a type Ia supernova event was discovered in this galaxy at 27″ east and 20″ north of the nucleus. It reached a peak visual magnitude of 12.85 around the end of June. Designated SN 1971L, it was situated along a spiral arm, suggesting that the progenitor was not a member of the older, more evolved stellar population of the galaxy. [Source: Wikipedia]

CAPTURE Information:
The image was captured with the iOptron CEM120 mount , the venerable Meade 12"LX200 SCT, and my Atik 383L+ m CCD at F7.16 (2182mm FL). Image subs were taken through Astronomik's broadband filters L, R, G and B. Subs were done at 1x1 bin, -10C, at 10 minutes for L (luminance), and 5 minutes for R, G and B.

IMAGE information -- 2019:
Lum: 41 subs (6.83hr) on Aug 20th, 21st and 25th.
Red: 30 subs (2.50hr) on Aug 18th, 19th and 26th.
Green: 27 subs (2.25hr) on Aug 19th, 20th and 26th.
Blue: 30 subs (2.50hr) on Aug 18th, 19th and 26th.
on Aug 15th.

Processing was done with PixInsight, following (for the most part) kayronjm's tutorial of Feb. 24th. Only L was used to develop the Luminance image. R, G and B were collected for the color mix.
North is to the right (I think), and this is a slight crop due to the misalignment accumulation from so many different filters and times.

COMMENTS:
This was an overall tough target. From our skies it is dim and lacks much color. I did boost both with the processing software and as a result, this image suffers (a bit) from over-processing.
It's interesting that in the 2nd paragraph from the above general description, there is a reference to H II in the nucleus. I did make an attempt to capture some Ha filter photons in order to give the image a red boost. However I saw no benefit.

Comments

Author

niteman1946
niteman1946
License: None (All rights reserved)
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NGC6384 Spiral Galaxy, 



    
        

            niteman1946