Star Right Ascension Declination

Question

Aldebaran 4h 36m 16¢X 31'
Miaplacidus 9h 13m -69¢X 42'
Deneb 20h 41m 45¢X 20'
Regulus 10h 08m 12¢X 18'
Hadar 14h 04m -60¢X 24'

1.If Aldebaran is crossing your local meridian, how long would you need to wait to see Regulus cross the meridian?

2.If Aldebaran is crossing the local meridian in Saint Petersburg, Russia, what are its azimuth and altitude, in degrees?

3.At the instant when Aldebaran crosses the local meridian of Saint Petersburg, Russia, at what latitude and longitude on Earth would an observer see Miaplacidus at her zenith?

4.Which of the stars would be visible in the early evening sky (around sunset) on September 21 in Sao Paulo, Brazil?

Answer 1

Tut tut - this is meant to be all your own work!

Answer 2

you're taking the coursera course aren't you? It's supposed to be your own work I had a bit of trouble working this out but it goes as follows

aldebaran is RA 4 36
regulus is RA 10 08

all you need to do is find the difference (in numbers)between the two and there is your answer
from 4 36 find the difference to make it up to 10 ( in time sense though)
when you found that add 8 and there is the answer
example - 4 36
+ 5 32
= 10.08

so the answer is 5 Hours and 32 minutes

Answer 3

5 32