Observation by Alan Thomas: Holmberg 391 Galaxy Pair in Coma Berenic...

Uploaded by

Alan Thomas

Observer

Alan Thomas

Observed

2022 Dec 17 - 06:22

Uploaded

2022 Dec 30 - 18:00

Objects

NGC4340
NGC4350

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Constellation

Coma Berenices

Field centre

RA: 12^h23^m
Dec: +16°42'
Position angle: +179°34'

Field size

0°32' × 0°26'

Equipment

42cm CDK17 corrected Dall-Kirkham f/6.8
FLI ProLine KAF-09000 camera
10Micron GM4000 mount

Exposure

3mins.

Location

Observatorio del Teide, Tenerife

Target name

Holmberg 391 Galaxy Pair in Coma Berenices

Title

Holmberg 391 Galaxy Pair in Coma Berenices

About this image

This pair of (probably) interacting galaxies in Coma Berenices were discovered by William Herschel on the same night in March 1784. NGC4340 (L) is an interesting ring galaxy, while NGC4350 is a lenticular galaxy seen edge on. Both are members of the Virgo Cluster.

In this COAST image of NGC4340, the faint ring surrounding the nucleus, which is set in a smaller disk, can be seen. It appears oval in shape, perhaps because the galaxy is not viewed face on. The bar linking the nucleus to the ring is also visible, with two brighter ansae at each end merging with the ring. Distance c.55million ly. Diameter c. 55,000 ly. Apparent mag. c.11.

NGC4350 presents a bright spindle shape with fainter extensions. Distance c.53million ly. Diameter c.50,000ly. Apparent mag. c.11.

The pair are separated by about 5 arc minutes.

Files associated with this observation

NGC4350 (2).jpg (365.0 kB)

Like this image

Mike Foylan, Callum Potter, Dr Paul Leyland, David Basey

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