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Contains:  16 Psc, NGC 7714, NGC 7715, NGC7714, NGC7715, The star 16Psc
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Arp 284 and friends, 


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Arp 284 and friends

Technical card

Dates:Sept. 30, 2017

Baader Planetarium B 1" 1/4: 9x300" -15C bin 1x1
Baader Planetarium G 1" 1/4: 9x300" -15C bin 1x1
Baader Planetarium L 1" 1/4: 15x300" -15C bin 1x1
Baader Planetarium R 1 1/4": 9x300" -15C bin 1x1

Integration: 3.5 hours

Darks: ~1

Flats: ~15

Bias: ~1

Avg. Moon age: 9.53 days

Avg. Moon phase: 72.05% job: 1756559

RA center: 23h 36' 18"

DEC center: +2° 6' 53"

Pixel scale: 0.544 arcsec/pixel

Orientation: 176.835 degrees

Field radius: 0.205 degrees

Resolution: 2048x1772

Locations: Home Observation, Sheffield, United Kingdom

Data source: Backyard


I became aware of this composition in a recent article in Sky and Telescope, and decided to try and capture it in my backyard. It shows a conjunction of objects at three different cosmic scales...

In the foreground is the star 16 Pisces; at magnitude 5.7 this is visible by the naked eye and overshadows everything in this deep sky image - processing it away selectively was a challenge! This star is a mere 100 light years away.

Nearby in the image are the two interacting galaxies, NGC 7714 and 7715, collectively know as Arp 284. The peculiar shapes are evidence of strong intergalactic forces. These galaxies are around 100 million light years away.

To the right and slightly below Arp 284 (see small label) is a small blueish 'star' that is actually a quasar (QSO B2333+019) 10 billion light years away! (z = 1.87).

The night was quite windy and so guiding was not as good as it might be; some more detail could be revealed on a better night perhaps.



License: None (All rights reserved)

Sky plot

Sky plot


Arp 284 and friends, 



In these public groups

UK Astro-Imaging