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Observing >> Double Star Observing

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Greatshot
sage


Reged: 04/15/10

Loc: Norton, MA
Struve double star maps?
      #4559483 - 05/03/11 04:03 PM

Exactly what it says on the tin... I'm becoming a big fan of double stars, but I'm running short on targets I can actually find. I don't have any way to use (nor admittedly, much interest-- i'm a very visual driver and haven't been able to make much sense of that anyways) in RA/degree listings. Is there any place I can find some actual star charts with these marked? Stellarium doesn't acknowledge the STF name conventions. It seems like a fairly huge list and I think it'd keep me busy for quite awhile. Alternatively if anyone knows any *other* DS catalog that provides actual charts, I'd be equally greatful for that as well. All my attempts at finding them seem to just provide RA/DEC coordinates.


Thanks for the help.


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stevecoe
"Astronomical Tourist"
*****

Reged: 04/24/04

Loc: Arizona, USA
Re: Struve double star maps? new [Re: Greatshot]
      #4559533 - 05/03/11 04:25 PM

Chris;

When I was star hopping I used the Uranometria star charts. That RA/Dec position can be easily turned into a position on the charts. Highly recommended, the combination of Uranometria, a Telrad and a 50mm to 80mm finder will really help.

Clear skies;
Steve Coe


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Helcarexe
Pooh-Bah


Reged: 12/24/10

Loc: Des Moines, Iowa
Re: Struve double star maps? new [Re: stevecoe]
      #4559714 - 05/03/11 05:52 PM

I would suggest getting that star atlas and or one of the following

The Cambridge Double Star Atlas by James Mullaney
Sky Atlas 2000 by Roger W. Sinnott
Cambridge Star Atlas 2000 by Wil Tirion

They can be of great help as they show which star are doubles and other important DSO in the area.


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desertstars

*****

Reged: 11/05/03

Loc: Tucson, AZ
Re: Struve double star maps? new [Re: Helcarexe]
      #4559850 - 05/03/11 06:52 PM

I've found the coverage of the Struve catalog in the Cambridge Double Star Atlas good enough for my purposes.

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mountain monk
Carpal Tunnel
*****

Reged: 11/06/09

Loc: Grand Teton National Park
Re: Struve double star maps? new [Re: desertstars]
      #4560067 - 05/03/11 08:43 PM

Another vote for the Cambridge Double Star Atlas. Great "showpiece" list at the front. Sissy Hass, Double Stars for Small Telescopes has a bit more detailed observing information (a short paragraph) for 2,100 doubles.

Dark skies.

mm


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nightofnit
member


Reged: 04/06/11

Loc: NW Ohio
Re: Struve double star maps? new [Re: mountain monk]
      #4560135 - 05/03/11 09:22 PM

I prefer the Hass book. The Cambridge Atlas, for some reason, does not give Position Angle. For difficult doubles, being able to visually match the published PA really confirms that the secondary has been identified

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Greatshot
sage


Reged: 04/15/10

Loc: Norton, MA
Re: Struve double star maps? new [Re: nightofnit]
      #4560494 - 05/04/11 01:24 AM

I've done the requisite googling and it sounds like the CDSA's the one for me. It sounds like the Uranometria's a bit out of budget currently (as I'd likely want to get all 3 volumes). I'll keep it in mind for the future, however, as it sounds like it's a much more robust mapset.

nightofnit, i'm curious.. PA is essentially where the stars are in relation to each other (ie, secondary NW of primary) kind of thing, right? I think I can live without that to get the better maps-- generally I can guesstimate degrees of separation well enough to tell if I'm looking at the right ones, though I might snag the other book further down the line when money's less tight.

Thanks for all the help


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exile
sage


Reged: 01/15/08

Loc: Guangzhou, China
Re: Struve double star maps? new [Re: Greatshot]
      #4560537 - 05/04/11 02:13 AM

Very good FREE atlas here iwth about 2,500 doubles and multiples, most of which should be resolvable with an 8". Keep you busy for years. Check this post:

http://www.cloudynights.com/ubbarchive/showflat.php/Cat/0/Number/1849437/page/3/view/collapsed/sb/5/o/all/fpart/1

Regarding P.A., stars in the telescope field of view will ALWAYS drift out of view to the west (called the 'preceding' quadrant). In a reflector, just memorise "poisonous snakes feel nice" to name off the cardinal directions clockwise from west (preceding) - in other words, position angles corresponding to 270, 180, 90 and 0/360 degrees, respectively.


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Greatshot
sage


Reged: 04/15/10

Loc: Norton, MA
Re: Struve double star maps? new [Re: exile]
      #4560591 - 05/04/11 03:14 AM

Well, free's even better.

That's an awesome list right there, thanks exile!

I'm getting 403 forbidden errors trying to access it the links in the thread, but a quick google search (hurrah google!) found them mirrored elsewhere easily enough. Link at bottom of post in case anyone else reading happens to want them

As for PA, yea, that's about what I thought. It's very similar to positions in an airplane, so i get the general idea of it. Thanks again.

Taki Charts mirror


Edited by Greatshot (05/04/11 03:16 AM)


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exile
sage


Reged: 01/15/08

Loc: Guangzhou, China
Re: Struve double star maps? new [Re: Greatshot]
      #4560601 - 05/04/11 03:25 AM

yeah, it's still available on many mirrors, Greatshot. Go for it. It's a great resource, I use it nightly with nothing more than 90mm. There's a complete list by chart you should download as well, excellent for planning observing runs

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Cotts
Just Wondering
*****

Reged: 10/10/05

Loc: Toronto, Ontario
Re: Struve double star maps? new [Re: Greatshot]
      #4560919 - 05/04/11 09:53 AM

I have my Millennium Star Atlas marked now with every Struve list object. It took about 30 hours in all to do which was accomplished on several cloudy nights. Part of my 'observe all the Struves' lifetime project. I did this since there was no atlas which listed all of them.

Next: the Otto Struves.....

Dave


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desertstars

*****

Reged: 11/05/03

Loc: Tucson, AZ
Re: Struve double star maps? new [Re: nightofnit]
      #4561587 - 05/04/11 03:45 PM

Quote:

I prefer the Hass book. The Cambridge Atlas, for some reason, does not give Position Angle. For difficult doubles, being able to visually match the published PA really confirms that the secondary has been identified




Unfortunately, Double Stars for Small Telescopes by Haas has no charts, so if it's star charts you're after, it won't be much help.

However, when I'm out hunting doubles it's Haas' book and the CDSA you'll find under the red light on my table. For locating the target the atlas is about as good as they come. For verifying what I've found, the Haas book has become indispensable. The combination scopeside is hard to beat.


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desertlens
scholastic sledgehammer
*****

Reged: 12/06/10

Loc: 36N 105W
Re: Struve double star maps? new [Re: desertstars]
      #4562224 - 05/04/11 09:15 PM

Gotta agree with desertstars. The CDSA and Haas (which has important aperture info). Happy hunting.

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Greatshot
sage


Reged: 04/15/10

Loc: Norton, MA
Re: Struve double star maps? new [Re: desertlens]
      #4562316 - 05/04/11 10:10 PM

Mmm, I can see how the pair would make a nice 1-2 punch, but for starters it's the charts I really need. I think I'll pick that one up and then get the Hass book down the line for the additional info once I start hitting a wall of what I can confirm seeing on my own.

Thanks all


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Ed Wiley
scholastic sledgehammer


Reged: 05/18/05

Loc: Kansas, USA
Re: Struve double star maps? new [Re: Greatshot]
      #4562434 - 05/04/11 11:18 PM

All the previous posts give good advice. I have been playing around with SkyTools Pro3. For any night I do a search for doubles. I can then select all the WDS doubles with the "STF" discovers code. These are ported to an observing list and I can then call up finder charts. It can be a bit tedious, but you can pare down the list by specifying separations appropriate to your scope.

Ed


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desertstars

*****

Reged: 11/05/03

Loc: Tucson, AZ
Re: Struve double star maps? new [Re: Greatshot]
      #4563013 - 05/05/11 09:46 AM

Quote:

Mmm, I can see how the pair would make a nice 1-2 punch, but for starters it's the charts I really need. I think I'll pick that one up and then get the Hass book down the line for the additional info once I start hitting a wall of what I can confirm seeing on my own.

Thanks all






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Helcarexe
Pooh-Bah


Reged: 12/24/10

Loc: Des Moines, Iowa
Re: Struve double star maps? new [Re: desertstars]
      #4563028 - 05/05/11 09:54 AM

Quote:

Quote:

Mmm, I can see how the pair would make a nice 1-2 punch, but for starters it's the charts I really need. I think I'll pick that one up and then get the Hass book down the line for the additional info once I start hitting a wall of what I can confirm seeing on my own.

Thanks all









We are always glad to help those who want to observe & hunt doubles.

So keep looking up....


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desertstars

*****

Reged: 11/05/03

Loc: Tucson, AZ
Re: Struve double star maps? new [Re: Helcarexe]
      #4563544 - 05/05/11 02:33 PM

Chris: Of course, if you get stuck on something before your library is complete, you know where to find us.

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idealistic
scholastic sledgehammer
*****

Reged: 12/31/10

Loc: massachusetts
Re: Struve double star maps? new [Re: exile]
      #4567200 - 05/07/11 11:36 AM

Quote:

Regarding P.A., stars in the telescope field of view will ALWAYS drift out of view to the west (called the 'preceding' quadrant). In a reflector, just memorise "poisonous snakes feel nice" to name off the cardinal directions clockwise from west (preceding) - in other words, position angles corresponding to 270, 180, 90 and 0/360 degrees, respectively.



Could someone explain this "poisonous snakes feel nice" thing to me. I might be having a bonehead moment, but I dont know what this means.


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Helcarexe
Pooh-Bah


Reged: 12/24/10

Loc: Des Moines, Iowa
Re: Struve double star maps? new [Re: idealistic]
      #4567332 - 05/07/11 12:47 PM

I don't know what the acronym stands for, but the cardinal direction represent the direction the companion star is located in reference to the primary star.

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