<p>The age in that paper is given as <span class="math-container">$\log t/{\rm Gyr} = 8.52$</span>. This is a typo. It should be <span class="math-container">$\log t/{\rm yr}=8.52$</span>, which corresponds to 331 Myr. i.e. There is no discrepancy once the obvious typo has been accounted for.</p>

CC BY-SA 4.0
2022-10-09T17:38:46.087Z
How do you derive 330 from 8.52?  What formula should I apply to get 330 using non-scientific formula, i.e. something that I can use a non-scienific calculator to work out.
MiscellaneousUser
CC BY-SA 4.0
2022-10-09T17:49:00.387Z
I ultimately want to turn it into a computer formula so scientific notation won't help me with notation.
MiscellaneousUser
CC BY-SA 4.0
2022-10-09T18:11:19.793Z
$\log_{10} (331\times 10^6)= 8.52$ @MiscellaneousUser Or $10^{8.52}=331\times10^6$.
ProfRob
CC BY-SA 4.0
2022-10-09T18:20:30.753Z
Thanks for the clarification, I get the figures and am happy.  Will apply the formula to the others.
MiscellaneousUser
CC BY-SA 4.0
2022-10-09T17:04:56.363Z
2022-10-09T17:24:50.450Z
2022-10-09T17:24:50.450Z
ProfRob
<p>According to <a href="https://en.wikipedia.org/wiki/Alpha_Piscium" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Alpha_Piscium</a>, the age of Piscium B is 331 Myr and   the Surface Gravity of 4.01 ± 0.14  it cites the link :- <a href="https://academic.oup.com/mnras/article/483/2/2300/5184501?login=false" rel="nofollow noreferrer">https://academic.oup.com/mnras/article/483/2/2300/5184501?login=false</a></p>
<p>When we view the table, <a href="https://academic.oup.com/view-large/127773013" rel="nofollow noreferrer">https://academic.oup.com/view-large/127773013</a> , we see it says the SG is 4.01 and that the age of said star is 8.52 Gyr.</p>
<p>Therefore,</p>
<pre><code>a) Wikipedia is wrong
b) 8.52 Gyr is not the age but represents something else and where in the document is 331 derived from?
c) I'm missing something 
</code></pre>

<star>
Age of Alpha Piscium B
MiscellaneousUser
# Age of Alpha Piscium B

(Asked by: username_0 on 2022-10-09)

According to <https://en.wikipedia.org/wiki/Alpha_Piscium>, the age of Piscium B is 331 Myr and the Surface Gravity of 4.01 ± 0.14 it cites the link :- <https://academic.oup.com/mnras/article/483/2/2300/5184501?login=false>

When we view the table, <https://academic.oup.com/view-large/127773013> , we see it says the SG is 4.01 and that the age of said star is 8.52 Gyr.

Therefore,

```
a) Wikipedia is wrong
b) 8.52 Gyr is not the age but represents something else and where in the document is 331 derived from?
c) I'm missing something 

```

**Tags:** star


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## 1 answers

### Answer by username_1 on 2022-10-09. Score: 2 | Accepted answer

The age in that paper is given as $\log t/{\rm Gyr} = 8.52$. This is a typo. It should be $\log t/{\rm yr}=8.52$, which corresponds to 331 Myr. i.e. There is no discrepancy once the obvious typo has been accounted for.

> **Comments:**
> **username_0**: How do you derive 330 from 8.52?  What formula should I apply to get 330 using non-scientific formula, i.e. something that I can use a non-scienific calculator to work out.  
> **username_0**: I ultimately want to turn it into a computer formula so scientific notation won't help me with notation.  
> **username_1**: $\log_{10} (331\times 10^6)= 8.52$ @username_0 Or $10^{8.52}=331\times10^6$.  
> **username_0**: Thanks for the clarification, I get the figures and am happy.  Will apply the formula to the others.  

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