Observation by John Hughes: NGC188 (Caldwell 1)

Uploaded by

Mr John William Hughes

Observer

John Hughes

Observed

2021 Jan 21 - 23:10

Uploaded

2021 Jan 23 - 07:43

Objects

NGC188

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Constellation

Cepheus

Field centre

RA: 00^h47^m
Dec: +85°13'
Position angle: -1°51'

Field size

1°39' × 1°10'

Equipment

William Optics Z103 refractor
ZWO ASI1600mm Pro Cooled camera
Chroma LRGB 1.25” filters
Sesto Senso motor focuser
SkyWatcher EQ6R-Pro mount
William Optics 50mm guidescope & Lodestar x2 guide camera
ZWO EFW

Exposure

Gain 139, Offset 30, Sensor temperature -10℃

Location

North Essex, UK

Target name

NGC188 (Caldwell 1)

Title

NGC188 (Caldwell 1)

About this image

NGC188 (Caldwell 1)

There are three constants when I am imaging, my equipment, clear skies and Polaris. Tonight I decided to make the region around Polaris my focus.

NGC188 is located in the constellation Cepheus and is 5° from the celestial north pole. It is one of the oldest known open clusters, estimated to be 6-7 billion years of age. As you would expect with a star cluster of this age, there are no white main sequence stars and its brightest components are mainly yellow class giants.

Surprisingly, after all this time the stars making up the cluster have not drifted apart under the gravitational influence of our galaxy. This is believed to be due to the fact that it is located some 5,000 light years above the Milky Way’s disc.

Files associated with this observation

NGC188_LRGB_WB.jpg (1.6 MB)

Like this image

Mike Harlow, David Basey, Graham Winstanley, Grant Privett, Peter Mulligan

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