right ascension

14 years 3 weeks ago #32308 by Burrd255314
right ascension was created by Burrd255314
Hey.

Try as I might, I haven't been able to find out how to find a star if you know it's right ascension.
I have no problem with Dec,so am looking at the right angle, but not knowing which direction to point is driving me crazy!!!

Could someone please explain it to me and give me an example?
For instance, if I am looking directly south at 22:00, what is the line of right ascension that I am seeing? (I live at 3 dgerees west)

Thanks alot.

Jay

BTW. I am using binoculars and sometimes a friend's Dob so I can't just turn a setting circle dial

Please Log in or Create an account to join the conversation.

14 years 3 weeks ago #32312 by voyager
Replied by voyager on topic Re: right ascension

Hey.

Try as I might, I haven't been able to find out how to find a star if you know it's right ascension.
I have no problem with Dec,so am looking at the right angle, but not knowing which direction to point is driving me crazy!!!

Could someone please explain it to me and give me an example?
For instance, if I am looking directly south at 22:00, what is the line of right ascension that I am seeing? (I live at 3 dgerees west)

Thanks alot.

Jay

BTW. I am using binoculars and sometimes a friend's Dob so I can't just turn a setting circle dial


You can't really do these kinds of calculations in your head so my advice would be to get a planisphere or to use a software package like Cartes Du Ciel for Windows or KStars on Linux or the Mac. Whether you use a planisphere or softwar you just have to set the time and date (and your location in the case of the software) and you can read the RA and DEC off a grid. In the case of the software you can see both an RA/Dec and an Alt/Az grid at the same time so you can see what RA/DEC is at any point in the sky.

Hope that helps,

Bart.

My Home Page - www.bartbusschots.ie

Please Log in or Create an account to join the conversation.

14 years 3 weeks ago #32348 by Burrd255314
Replied by Burrd255314 on topic Re: right ascension
I have Starry Night and enjoy to use it, but I don't take a laptop out when I'm observing so it's no good.



:cry:

Is there no formula for it?

Please Log in or Create an account to join the conversation.

14 years 3 weeks ago #32349 by voyager
Replied by voyager on topic Re: right ascension

I have Starry Night and enjoy to use it, but I don't take a laptop out when I'm observing so it's no good.



:cry:

Is there no formula for it?


There is but it's not something you'd do in your head! ( www.stargazing.net/kepler/altaz.html )

If you need something to take out under the stars then you can either print a map from something like Cartes du Ciel or Starry Night or, a more environmentally friendly option would be to get a planispehere.

Bart.

My Home Page - www.bartbusschots.ie

Please Log in or Create an account to join the conversation.

14 years 3 weeks ago #32350 by Burrd255314
Replied by Burrd255314 on topic Re: right ascension
Cheers

I guess I'm stuck with Sky&Telescope maps for the time being until I get an EQ mount

Please Log in or Create an account to join the conversation.

14 years 3 weeks ago #32351 by Perseus
Replied by Perseus on topic Re: right ascension
Especially since you are using binos and a dob you probably don't have to worry to much about right ascension when trying to find stars/objects.

Probably easier to use concellations and star hop.

Just my thoughts, Damon

Please Log in or Create an account to join the conversation.

14 years 3 weeks ago #32352 by albertw
Replied by albertw on topic Re: right ascension

BTW. I am using binoculars and sometimes a friend's Dob so I can't just turn a setting circle dial


For this you are probably better off just getting a set of starmaps, even the collins gem ones, and learning your way around the sky by star hopping.

Then rather than having to read the RA dec, you can just look at a starmaps and see that X is a few degrees left of rigel etc.

I only bother with detailed star charts and getting coords when I'm searching for something very faint or an asteroid.

Albert White MSc FRAS
Chairperson, International Dark Sky Association - Irish Section
www.darksky.ie/

Please Log in or Create an account to join the conversation.

14 years 3 weeks ago #32369 by Burrd255314
Replied by Burrd255314 on topic Re: right ascension
I just bought the collins maps today - I'm having a look at them and drawing circles, that's todays activities :)

Please Log in or Create an account to join the conversation.

Time to create page: 0.086 seconds
Powered by Kunena Forum