<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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