<p><a href="https://i.sstatic.net/hHgvL.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/hHgvL.png" alt="enter image description here" /></a></p>
<p>Can someone tell me how one would approach this type of question. is there an equation we would use or something of the sort.</p>
<p>Ths solution to this question is given below but I just want to understand how it works.
<a href="https://www.ioaastrophysics.org/wp-content/uploads/2019/09/TH-solution-2017.pdf" rel="nofollow noreferrer">https://www.ioaastrophysics.org/wp-content/uploads/2019/09/TH-solution-2017.pdf</a></p>
<p>Inparticular I dont understand these 2 equations. <a href="https://i.sstatic.net/b5TrZ.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/b5TrZ.png" alt="enter image description here" /></a></p>

CC BY-SA 4.0
2023-07-14T15:54:05.090Z
You should give some context and what you know how to do.  This questuon seems to be about the relationship between Sidereal Time and UTC.
Greg Miller
CC BY-SA 4.0
2023-07-14T16:07:06.947Z
Is there enough information here to answer your question? https://en.wikipedia.org/wiki/Culmination
Dave Gremlin
CC BY-SA 4.0
2023-07-14T17:57:46.397Z
yes the question contains enough information to be answered I will link the solution here. Its not the solution Im confused about but its how its solved.
https://www.ioaastrophysics.org/wp-content/uploads/2019/09/TH-solution-2017.pdf
Moiz khokhar
CC BY-SA 4.0
2023-07-14T18:00:12.550Z
the question is from the IOAA 2017. I'm confused about how you can get the date for culmination at 9 am. time for culmination changes everyday because the sidereal day runs about 4 minutes faster but other than that I dont understand how you would get from the information given to a specific date.
Moiz khokhar
CC BY-SA 4.0
2023-07-14T18:35:18.757Z
Sounds like you know enough to answer it yourself.  What time will it culminate on Jan 1, then compute how many 4 minute intervals you need before it culminates at 9.
Greg Miller
CC BY-SA 4.0
2023-07-15T05:37:55.443Z
Why do you want 9 AM? The question specifies 9 PM.
PM 2Ring
CC BY-SA 4.0
2023-07-15T10:43:33.790Z
yeah no I mistakenly wrote 9 AM I meant 9 PM
Moiz khokhar
CC BY-SA 4.0
2023-07-15T10:44:58.333Z
Ok Ill try it using greg millers approach
Moiz khokhar
<time><declination><right-ascension>
How to even approach this type of question
Moiz khokhar
# How to even approach this type of question

(Asked by: username_0 on 2023-07-14)

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

Can someone tell me how one would approach this type of question. is there an equation we would use or something of the sort.

Ths solution to this question is given below but I just want to understand how it works.
<https://www.ioaastrophysics.org/wp-content/uploads/2019/09/TH-solution-2017.pdf>

Inparticular I dont understand these 2 equations. [![enter image description here](https://i.sstatic.net/b5TrZ.png)](https://i.sstatic.net/b5TrZ.png)

**Tags:** time, declination, right-ascension
> **Comments:**
> **username_1**: You should give some context and what you know how to do.  This questuon seems to be about the relationship between Sidereal Time and UTC.  
> **username_2**: Is there enough information here to answer your question? https://en.wikipedia.org/wiki/Culmination  
> **username_0**: yes the question contains enough information to be answered I will link the solution here. Its not the solution Im confused about but its how its solved. https://www.ioaastrophysics.org/wp-content/uploads/2019/09/TH-solution-2017.pdf  
> **username_0**: the question is from the IOAA 2017. I'm confused about how you can get the date for culmination at 9 am. time for culmination changes everyday because the sidereal day runs about 4 minutes faster but other than that I dont understand how you would get from the information given to a specific date.  
> **username_1**: Sounds like you know enough to answer it yourself.  What time will it culminate on Jan 1, then compute how many 4 minute intervals you need before it culminates at 9.  
> **username_3**: Why do you want 9 AM? The question specifies 9 PM.  
> **username_0**: yeah no I mistakenly wrote 9 AM I meant 9 PM  
> **username_0**: Ok Ill try it using greg millers approach  

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