<p>The variation isn't periodic. The light curve below (<a href="https://www.aavso.org/vsots_gammacas" rel="nofollow noreferrer">from aavso</a>) shows the period from 1960.</p>
<p><a href="https://i.sstatic.net/ALV5Q.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/ALV5Q.png" alt="enter image description here" /></a></p>
<p>In the 1930s the star also had an episode of fading and brightening, It faded by about a magnitude over about 150 days. (<a href="http://adsabs.harvard.edu/full/1940AJ.....49...29A" rel="nofollow noreferrer">source</a>)</p>

CC BY-SA 4.0
2021-09-08T05:43:36.093Z
2021-09-08T05:43:36.093Z
James K
<p><a href="https://en.wikipedia.org/wiki/Gamma_Cassiopeiae" rel="nofollow noreferrer">Gamma Cassiopeiae</a> is a variable star whose magnitude changes between 1.6 and 3. On what timescale does it vary?</p>
<p>The Wikipedia page says that it is irregular, but what is the timescale of its variations? Less than a day? A month? Several years? On average, how long would I have to wait before noticing a variation in its brightness?</p>

<variable-star><estimate>
What is the period of Gamma Cassiopeiae?
usernumber
# What is the period of Gamma Cassiopeiae?

(Asked by: username_0 on 2021-09-07)

[Gamma Cassiopeiae](https://en.wikipedia.org/wiki/Gamma_Cassiopeiae) is a variable star whose magnitude changes between 1.6 and 3. On what timescale does it vary?

The Wikipedia page says that it is irregular, but what is the timescale of its variations? Less than a day? A month? Several years? On average, how long would I have to wait before noticing a variation in its brightness?

**Tags:** variable-star, estimate

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## 1 answers

### Answer by username_1 on 2021-09-08. Score: 2

The variation isn't periodic. The light curve below ([from aavso](https://www.aavso.org/vsots_gammacas)) shows the period from 1960.

[![enter image description here](https://i.sstatic.net/ALV5Q.png)](https://i.sstatic.net/ALV5Q.png)

In the 1930s the star also had an episode of fading and brightening, It faded by about a magnitude over about 150 days. ([source](http://adsabs.harvard.edu/full/1940AJ.....49...29A))


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