What is the right ascension of a star that is on the meridian at midnight at the time of the autumnal equinox?

- Advertisement -
- Advertisement -
Notify of
Most Voted
Newest Oldest
Inline Feedbacks
View all comments

We can figure this out using a little knowledge and a little logic. The Sun is at 0 hours RA on the vernal equinox (that’s the definition of 0h RA) so it must be at 12 hours RA on the autumnal equinox. At midnight, the Sun is below you, so anything on your meridian must be 12 hours away from the Sun. Therefore a star on the meridian must be about 0 hours RA.
(Of course, this does not account for daylight savings time, or where you are in your time zone).

Eugene N

You’ll need to know what year as the autumnal equinox varies in time and day each year.


Both good answers above.
You also need to know, however, how many hours between the actual equinox and your local midnight — since the equinox won’t necessarily be at your local midnight 🙂
But the first answer gave a good approximation.

Mr. x

What if the sun is the star we are talking about?


The LHC Scientists ensure that high-energy collisions are no threat to Earth or any humans, is that true?

I read on wikipedia that High-energy collsions are completely safe, as for the safety of Earth and humans. But my teacher says that it...

Does anyone have bouquet ideas for an amethyst/silver wedding?

Our wedding colors are amethyst and silver The bridesmaids dresses are amethyst. Does anyone have pictures of bouquets that would go with this color...

How can zen archery and zazen both be classed as the vehicle for the same awakening?

I know there are many methods of meditation in the midst of circumstances. I am interested in the theory that zen archery is...

Can you really see through your third eye?

Or is it some kind of imagination? and if you can see , how do I activate it?

Is Yoga effective in helping to tone up?

If you've done yoga for awhile, have you seen a difference in your body? Or do you mainly use it for relaxation?
Would love your thoughts, please comment.x