Hemisphere:  Southern  ·  Constellation: Sagittarius (Sgr)  ·  Contains:  Hourglass nebula  ·  IC 4715  ·  IC 4725  ·  Lagoon nebula  ·  M 20  ·  M 21  ·  M 22  ·  M 23  ·  M 25  ·  M 28  ·  M 8  ·  NGC 6469  ·  NGC 6494  ·  NGC 6514  ·  NGC 6523  ·  NGC 6526  ·  NGC 6530  ·  NGC 6531  ·  NGC 6546  ·  NGC 6568  ·  NGC 6595  ·  NGC 6626  ·  NGC 6656  ·  Part of the constellation Sagittarius (Sgr)  ·  The star 11Sgr  ·  The star 15Sgr  ·  The star 21Sgr  ·  The star 29Sgr  ·  The star 4Sgr  ·  The star 58Oph  ·  And 5 more.
Accidental Mosaic (Astrotracer), 



    
        

            AlenK
Accidental Mosaic (Astrotracer)
Powered byPixInsight

Accidental Mosaic (Astrotracer)

Accidental Mosaic (Astrotracer), 



    
        

            AlenK
Accidental Mosaic (Astrotracer)
Powered byPixInsight

Accidental Mosaic (Astrotracer)

Technical card

Imaging telescopes or lenses: SMC Pentax-M 200mm F/4.0

Imaging cameras: Pentax K-3 II


Dates:Aug. 10, 2018

Frames: 7x60" ISO1600

Integration: 0.1 hours

Avg. Moon age: 28.46 days

Avg. Moon phase: 1.28%

Bortle Dark-Sky Scale: 3.00


Basic astrometry details

Astrometry.net job: 2905119

RA center: 18h 8' 59"

DEC center: -21° 16' 51"

Pixel scale: 20.177 arcsec/pixel

Orientation: 338.939 degrees

Field radius: 10.443 degrees


Resolution: 3840x1816

Data source: Traveller

Description

This mosaic was stitched together from a total of seven overlapping photos using Microsoft's Image Composite Editor (ICE). Each of the panels is a one-minute exposure at f/5.6.

The camera was mounted only on a tripod; tracking was provided internally using the camera's Astrotracer feature. This mosaic is accidental because I did not plan it. I just happened to take overlapping shots around that area in the course of evaluating the Astrotracer feature on my first night of using it.

(Note: This mosaic was actually assembled from the out-of-camera jpegs as a test. More detail and less noise should be possible when I redo from the raw files.)

Comments

Sky plot

Sky plot

Histogram

Accidental Mosaic (Astrotracer), 



    
        

            AlenK