Return to the Cloudy Nights Telescope Reviews home page


Observing >> Double Star Observing

Pages: 1 | 2 | 3 | (show all)
AjithSeattle
member


Reged: 04/20/13

Your favorite double stars to observe
      #5946400 - 06/29/13 11:27 AM

Last night, after three patient days of waiting for a chance to get to my telescope, I found a few hours where part of the northeast and eastern night sky was clear enough to setup my scope.

While it was not technically a "first light" for my Orion XT8i, it was the first time I used the 2-star align. After my first alignment attempt with Vega as the first star and Deneb as the second star yielded a warp factor of +3.5, I tried again. Altair was still behind the trees and I live in an neighborhood with lot of street lights and one shining directly at me in close proximity in the direction of tree-obscured Altair.

For the second attempt, I chose Vega again for the first star alignment and Polaris for the second alignment and this worked out great. It yielded a warp factor of -0.3 on the object locator. After I had this setup, I looked closely at polaris for the first time. It is a double! I'm sure all of you know it was a double and a cepheid variable but I didn't last night and it pleasantly surprised me. First, I thought I was miscategorizing some other stellar entity for Polaris, so I went to a narrow FOV with 4mm Plossl and large magnification. The idea was that it would drift away from my observational view like Vega did if it is not Polaris. After 5-10 minutes of leaving the scope as it while I digged around the Stellarium for RA/Dec and Alt/Az for Polaris for my vantage point,the field didn't change, it was dead center in the field. I also have a Wixey mounted on my XT8i and it showed good alignment with altitude with the Stellarium program.

Now, I read yesterday night that Polaris is actually a triple and not a double - apparently while the faint companion seen in 8" scope is the first one discovered by Herschel in 1780, there is another fainter white dwarf that was spectroscopically identified in 1929 and visually confirmed in 2006 (see this excellent write up - http://simostronomy.blogspot.com/2008/07/polaris.html).

I've been officially bitten by the double bug

Has anyone observed the third alpha UMi Ab?
If you had to pick top 5 double stars most interesting and exciting to observe, what would they be?

Cheers,
Ajith


Post Extras: Print Post   Remind Me!   Notify Moderator  
REC
Post Laureate
*****

Reged: 10/20/10

Loc: NC
Re: Your favorite double stars to observe new [Re: AjithSeattle]
      #5946436 - 06/29/13 11:49 AM

Good for you, ton's of double stars out there to investigate!

Time for you to track down the most famous of them all, Alberio in Cygnus and the double double in Cygnus!

Welcome to Cloudy Nights!

Bob


Post Extras: Print Post   Remind Me!   Notify Moderator  
obin robinson
Carpal Tunnel
*****

Reged: 10/25/12

Loc: League City, TX
Re: Your favorite double stars to observe new [Re: AjithSeattle]
      #5946478 - 06/29/13 12:15 PM

I am always mesmerized by Albireo.

http://apod.nasa.gov/apod/ap050830.html

obin


Post Extras: Print Post   Remind Me!   Notify Moderator  
Kfrank
Carpal Tunnel


Reged: 12/20/08

Loc: Northern Colorado
Re: Your favorite double stars to observe new [Re: REC]
      #5946492 - 06/29/13 12:21 PM

Quote:

Good for you, ton's of double stars out there to investigate!

Time for you to track down the most famous of them all, Alberio in Cygnus and the double double in Cygnus!

Welcome to Cloudy Nights!

Bob




Both excellent choices - but isn't the Double Double in Lyra?

Also check out Mizar in Ursa Major.


Post Extras: Print Post   Remind Me!   Notify Moderator  
desertlens
scholastic sledgehammer
*****

Reged: 12/06/10

Loc: 36N 105W
Re: Your favorite double stars to observe new [Re: Kfrank]
      #5946519 - 06/29/13 12:44 PM

You'll need to wait a bit but check out sigma Orionis, a quadruple. Nearby is a nice double, Struve 762. I was surprised at the appeal of doubles. Clear skies and good hunting.

Post Extras: Print Post   Remind Me!   Notify Moderator  
MikeBOKC
Post Laureate
*****

Reged: 05/10/10

Loc: Oklahoma City, OK
Re: Your favorite double stars to observe new [Re: AjithSeattle]
      #5946551 - 06/29/13 01:06 PM

Put Beta Monoceros on your winter list - the nicest triple star system in the sky.

Post Extras: Print Post   Remind Me!   Notify Moderator  
kfiscus
Carpal Tunnel
*****

Reged: 07/09/12

Loc: Albert Lea, MN, USA
Re: Your favorite double stars to observe new [Re: MikeBOKC]
      #5946674 - 06/29/13 02:24 PM

52 Cygni. I guess it's a triple. The reason I call it "my favorite star" is that it marks the location of the Veil Nebula. I have to get a really good night to try to separate the members. If I remember correctly, the star(s) aren't related to the nebula.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Kon Dealer
professor emeritus


Reged: 01/05/11

Loc: Cambridge UK
Re: Your favorite double stars to observe new [Re: kfiscus]
      #5946741 - 06/29/13 03:07 PM

Izar (E. Bootes) is my personal favourite.

Post Extras: Print Post   Remind Me!   Notify Moderator  
S.Boerner
sage


Reged: 04/29/10

Loc: Eastern Missouri
Re: Your favorite double stars to observe new [Re: Kon Dealer]
      #5946779 - 06/29/13 03:29 PM

Give the Trapezium in Orion a shot.

Post Extras: Print Post   Remind Me!   Notify Moderator  
Kraus
Pooh-Bah


Reged: 03/10/12

Loc: Georgia.
Re: Your favorite double stars to observe new [Re: S.Boerner]
      #5946948 - 06/29/13 05:36 PM


I'm partial to Izar and Alibero and sigma Orionis. I saw five stars quite easily in sigma Orionis. A sixth star tried to peek out at me.


Post Extras: Print Post   Remind Me!   Notify Moderator  
StarStuff1
Post Laureate
*****

Reged: 04/01/07

Loc: South of the Mason-Dixon Line
Re: Your favorite double stars to observe new [Re: Kraus]
      #5946974 - 06/29/13 05:58 PM

Next to Alberio the most beautiful double in the northern hemisphere is gamma andromadae. IMHO.

But one of the most unusual "multiple" star systems is H3780 in Lepus. This might just be a very sparse open cluster but it is very attractive in small scopes and often overlooked by better known targets. Well worth finding this coming Winter.


Post Extras: Print Post   Remind Me!   Notify Moderator  
JIMZ7
Pooh-Bah
*****

Reged: 10/22/05

Loc: S.E.Michigan near DTW
Re: Your favorite double stars to observe new [Re: StarStuff1]
      #5946988 - 06/29/13 06:06 PM

I second that for Albireo & Gamma Andromeda as my favorite double stars.

Jim


Post Extras: Print Post   Remind Me!   Notify Moderator  
Bakes
super member


Reged: 01/06/09

Loc: Stratford, CT
Re: Your favorite double stars to observe new [Re: JIMZ7]
      #5947258 - 06/29/13 10:15 PM

I'll also vote for Albireo, an old favorite. Alpha Herculis is a close split with nice color contrasts. Castor in the Winter. Mizar itself(not Alcor) splits nicely even in my first 50mm scope. Finally, for the fifth selection, Polaris. It's up all night all year for most of us.

Post Extras: Print Post   Remind Me!   Notify Moderator  
karstenkoch
professor emeritus


Reged: 04/21/12

Loc: GMT+9
Re: Your favorite double stars to observe new [Re: JIMZ7]
      #5947266 - 06/29/13 10:21 PM

Scorpius is putting on a good show this time of year in the southern sky for us northern hemisphere observers. Check out Graffias (beta scorpii) for a nice easy bright uneven double. It's the brightest star in the "top" arm of the scorpion. 1 1/2 degrees away is Jabbah (nu scorpii), another relatively bright and pretty uneven double. There's plenty more in the area. If you can, I recommend that you get a decent star altas that shows doubles such as the Cambridge Double Star Atlas to plan your nighttime hunts during the day. Clear skies, Karsten

Post Extras: Print Post   Remind Me!   Notify Moderator  
Perigny270
super member


Reged: 10/23/11

Loc: Temiscaming, Quebec
Re: Your favorite double stars to observe new [Re: Bakes]
      #5947271 - 06/29/13 10:26 PM

Many of my favourites have already been mentioned. But I must admit that I look for Antares every chance I get. Nice colour even if the split is difficult - it's a challenge well worth the effort.

Post Extras: Print Post   Remind Me!   Notify Moderator  
fred1871
scholastic sledgehammer


Reged: 03/22/09

Loc: Australia
Re: Your favorite double stars to observe new [Re: karstenkoch]
      #5947295 - 06/29/13 10:58 PM

Nu Scorpii (mentioned above as a wide double) is worth looking at - an easy wide pair at low power, but it's also a "double-double" because each star is a close pair. The brighter star is quite close (~1.3") and somewhat uneven - for northern observers it'll be a matter of steady air to show it; the lesser star is an easier, somewhat wider pair (2.4").

In okay seeing all four will show with a 6-inch Newtonian, not as easy as the Epsilon Lyrae "double-double", but still very nice.


Post Extras: Print Post   Remind Me!   Notify Moderator  
Nucleophile
super member


Reged: 05/24/13

Loc: United States
Re: Your favorite double stars to observe new [Re: fred1871]
      #5947338 - 06/29/13 11:37 PM

Cor Caroli is one of my favorites.
But I'll always look at Izar, Albireo, Almach, Trapezium and Antares given a chance.

Rigel, also, is quite beautiful in a simple way.
The double star function of your XT8i is a great way to get introduced to doubles.

I remember being *very impressed* that I could split an even double of 0.9 arcseconds when I first got that instrument--and now I work with it down near the Dawes Limit! What a sturdy, portable, powerful and ergonomic telescope--I'll never part with mine.


Post Extras: Print Post   Remind Me!   Notify Moderator  
ziridava
super member


Reged: 08/17/12

Loc: Arad,Romania,Eastern Europe
Re: Your favorite double stars to observe new [Re: Nucleophile]
      #5947683 - 06/30/13 08:47 AM

Why not add Porrima as a Spring favorite and 52 Ori as a Winter favorite.
Then,I'm in big trouble, there are so many beautiful double stars in the sky that I must admit I'm a polygamist in this matter.
All are beautiful in their own way ! I want them all!

Mircea


Post Extras: Print Post   Remind Me!   Notify Moderator  
gfeulner
sage
*****

Reged: 11/23/07

Loc: Bergen county, New Jersey
Re: Your favorite double stars to observe new [Re: AjithSeattle]
      #5947793 - 06/30/13 10:13 AM

I know the title is "favorite doubles" but I love triples. Beta Monoceros, Zeta Cancri and Iota Cassiopia among my favorites. Gerry

Post Extras: Print Post   Remind Me!   Notify Moderator  
StarStuff1
Post Laureate
*****

Reged: 04/01/07

Loc: South of the Mason-Dixon Line
Re: Your favorite double stars to observe new [Re: gfeulner]
      #5947877 - 06/30/13 11:21 AM

Wow, I can't believe no one has mentioned Algieba, gamma leonis. One of my favorite double star experiences was viewing it through holes in the clouds and a light rain falling. With an 80mm refractor it was simply stunning, yellow-green!

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | 3 | (show all)


Extra information
4 registered and 2 anonymous users are browsing this forum.

Moderator:  PJ Anway, Rich (RLTYS), rflinn68 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled


Thread views: 2538

Jump to

CN Forums Home




Cloudy Nights Sponsor: Astronomics