Observation by Paul Leyland: Var 1 in Messier 31

Uploaded by

Dr Paul Leyland

Observer

Paul Leyland

Observed

2022 Sep 05 - 00:21

Uploaded

2022 Sep 07 - 13:46

Objects

The Andromeda Galaxy (M31)

Equipment

0.4m Dilworth Relay
SX 694 CCD camera
No filter

Exposure

21 minutes in 21 60s-subs

Location

Tacande Observatory, MPC J22

Target name

Hubble's Var 1 in the Andromeda galaxy.

Title

Var 1 in Messier 31

About this image

Var 1, or "M31 V0619" as it is now more widely called, is one of the most important stars in the history of astronomy. Hubble discovered that it is a Cepheid variable in the Andromeda galaxy, M31, and so was able to prove beyond doubt that it lay well outside the bounds of our galaxy.

It lies in a glorious part of the galaxy which is stuffed full of open clusters, star clouds, emission nebulae, dust lanes, and globular clusters. The bright "star" immediately to the south of the prominent H-II region, itself to the southwest of Var 1, is actually a GC named B020D-G089 with a magnitude of 17.55. Several other GCs are visible if you know where to look.

Files associated with this observation

Var1.png (959.0 kB)

Like this image

Mattia Piccoli, Robin Leadbeater, Mike Harlow, Simon Paul Davis, David Basey, Nick James, Peter Carson, Jeremy Shears

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