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Events & Lecture Programme
In the Media
The Dick Chambers Sutton-at-Hone Observatory
Society Committee & Members
Minutes of Meetings
Simon Dawes, John Howarth
The Society has a long history of variable star observing from its formation and members have contributed several thousand observations to the BAA Variable Star Section.
Both experienced observers and newcomers are encouraged to participate in variable star observing. Since the late 1980's though, photoelectric photometry has been the prominent form of observing with the result that the number of visual observations has declined, this has since been superseded by CCD photometry in the mid 90's and this is now the main tool for photometric studies.
Variable stars are labelled after the constellation that they reside in, in order of discovery, the first variable in a constellation is given the designation 'R' and subsequent variables are labelled as follows...
R, S, T, U, V, W, X, Y, Z however this didn't prove to be enough! So the labelling continues with...
RR, RS... RZ,
SR, SS, and on until you reach ZZ, this also was inadequate, so the labelling continues from
AA through to QZ giving a total of 334 variables in any constellation, after this variables are numbed and have a preceding 'V', starting with V335 in recognition of the 334 variables before it.
3. Types of Variable
There are two broad categories of variable star, intrinsic and extrinsic variables.
Vary due to the internal nature of the star, for example a star that is pulsating.
Vary due to external influences, for example binary stars eclipsing each other.
- Watch a planet transit across the face of another star!
- Another Ex-Planet that can be observed by Crayford Members
Nova in Delphinus
- Observed by Honor Wheeler
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