How to know the right ascension and delineation of a heavenly body [Star]?

- Advertisement -

I’m just curious how astronomers locate easily a star by knowing these two astronomical terms.

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

they act as coordinates of the sky
just like your gps gives you coordinates
for places here on planets surface


There are setting circles on many fixed telescopes, but nowadays computerised telescopes can be bought fairly cheaply, and they’ll do all the work for you.


Right ascension if like longitude and declination is like latitude, only on the celestial sphere instead of the Earth. Right ascension is traditionally measured in hours and not degrees because it is determined by the time that a star passes overhead.


Every celestial body has a RA and DEC (right ascension and declenation) and these can be found in an “Ephemeris”. An equatorial mount scope has setting circles on the mount. Knowing the star time (siderial time) of the sky you are looking at, add or subtract from the setting circles and the scope will be pointed at your target.
RA and DEC of the sky is like latitude and longitude on


Is 30min cardio 5-7 x a week, strength training & yoga 2 x week enough to lose weight and tone muscle?

I'm trying to start a good workout program that I can stick with. I have a jump rope, a bicycle, and cardio dance for...

Is astrology wrong being a christian?

I like to read my horoscope from time to time like on the computer or in the paper but sometimes I feel guilty afterwards...

Can a severed human head retain consciousness for awhile before death?

I've seen this happen in Afro Samurai and Devils on the Doorstep, so I'm curious if there's any biological truth to this.

psychic medium HELP PLEASE!?

Why are these things happening to me? I keep typing in my things that are happening and the computer won't let it go...
Would love your thoughts, please comment.x