Observation by Kevin Gurney: Hickson 93

Uploaded by

Kevin Gurney

Observer

Kevin Gurney

Observed

2021 Oct 06 - 20:16

Uploaded

2021 Nov 17 - 20:20

Objects

NGC7550
NGC7558
NGC7553
NGC7547
NGC7549

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Constellation

Pegasus

Field centre

RA: 23^h15^m
Dec: +19°00'
Position angle: -177°18'

Field size

0°22' × 0°18'

Equipment

Altair Astro RC10 truss tube
Fornax 102 mount
ZWO ASI1600MM-Pro-cool
Atik Filter wheel
Baader filters, L, R, G, B
OAG, SX Lodestar2
Prism, Pixinsight

Exposure

L, 24x300s, , RGB, 8x300s each. All bin 1x1

Location

Charente, France

Target name

Hickson 93 (Arp 99)

Title

Hickson 93

About this image

Hickson 93 is one of Paul Hickson's 'Compact Galaxy' groups, estimated
to be around 265 million light years distant. It also designated as
number 99 in Arp's catalogue. It is dominated by the giant elliptical
galaxy NGC 7550 (in upper centre here). The spiral galaxy NGC 7549
just below this is highly distorted with long arcs of material being
pulled from its centre by gravitational interaction with its
neighbours.

The challenge here is to image the extensive but faint 'halo' around
the core of NGC 7550. There are hints of it here, but it would require
more data, I think, to pull out decisively.

Files associated with this observation

LRGB1_proc_C_FINAL.jpg (1.4 MB)

Like this image

Alan Thomas, Nick Hewitt, Martina McGovern, Simon Paul Davis, Graham Winstanley

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