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coutleef
Post Laureate
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Reged: 02/21/08

Loc: Saint-Donat, Quebec, Canada
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: Astrodj]
      #5490584 - 10/26/12 05:23 PM

Almach for me also

Also signals that fall is there, with all the outsied our galaxies goodies.


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Darren Drake
Carpal Tunnel
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Reged: 10/09/02

Loc: Chicagoland
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: Astrodj]
      #5490588 - 10/26/12 05:26 PM

Don't forget Izar...

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drollere
Pooh-Bah
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Reged: 02/02/10

Loc: sebastopol, california
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: Darren Drake]
      #5499903 - 11/01/12 08:52 PM

i guess i have a thing for bright, tight blondes ... i'd choose 53 AQR anytime.

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Pete-LH
sage
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Reged: 03/25/09

Loc: Wilmington, DE
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: drollere]
      #5499975 - 11/01/12 09:32 PM

Maybe mundane for most here but this last year Rigel was a nice suprise for me. Maybe because I've overlooked it for so long. Last winter I pushed to Rigel seeing it's graphic in the Cambridge chart was a double and stared at it looking for the companion and as my eye adjusted the small, blue sparkling gem appeared. Moments like that are so inspiring. Sorry for drifting from the theme.

As for Ginger and Mary Anne, I live for the moment so I would probably not choose wisely given the opportunity.


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jrbarnett
Eyepiece Hooligan
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Reged: 02/28/06

Loc: Petaluma, CA
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: Pete-LH]
      #5501016 - 11/02/12 01:59 PM

On the topic of star color, I though this article was interesting for us double star buffs. In keeping with the Ginger vs. Mary Anne discussion.

http://outreach.atnf.csiro.au/education/senior/astrophysi...

- Jim


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C_Moon
Pooh-Bah
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Reged: 10/23/09

Loc: Beneath the arms of Cassiopeia
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: Pete-LH]
      #5501332 - 11/02/12 06:31 PM

Quote:

Maybe mundane for most here but this last year Rigel was a nice suprise for me.




Bet no one here thinks Rigel is mundane


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jrbarnett
Eyepiece Hooligan
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Reged: 02/28/06

Loc: Petaluma, CA
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: C_Moon]
      #5501351 - 11/02/12 06:38 PM

I'd agree. Rigel is no "Lovey" Howell!

http://upload.wikimedia.org/wikipedia/en/thumb/d/dc/Lovey...

Polaris is the tune-up for Rigel. Rigel is the tune-up for Sirius. Sirius is a "rite of passage" for any double star sleuth earning his or her stripes.

- Jim


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C_Moon
Pooh-Bah
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Reged: 10/23/09

Loc: Beneath the arms of Cassiopeia
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: jrbarnett]
      #5501593 - 11/02/12 09:18 PM

Quote:

I'd agree. Rigel is no "Lovey" Howell!

http://upload.wikimedia.org/wikipedia/en/thumb/d/dc/Lovey...

Polaris is the tune-up for Rigel. Rigel is the tune-up for Sirius. Sirius is a "rite of passage" for any double star sleuth earning his or her stripes.

- Jim




Guess I'm still just a boy...


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jrbarnett
Eyepiece Hooligan
*****

Reged: 02/28/06

Loc: Petaluma, CA
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: C_Moon]
      #5501688 - 11/02/12 10:23 PM

Your XT8 this winter will surely remedy that. The Pup is ripe for house breaking my friend!



- Jim


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C_Moon
Pooh-Bah
*****

Reged: 10/23/09

Loc: Beneath the arms of Cassiopeia
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: jrbarnett]
      #5501794 - 11/02/12 11:28 PM

Quote:

Your XT8 this winter will surely remedy that. The Pup is ripe for house breaking my friend!



- Jim




Appreciate your confidence! It's not for lack of trying, that's for sure. But, practice makes perfect. And fortunately, I love to practice! So bring it on...


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drollere
Pooh-Bah
*****

Reged: 02/02/10

Loc: sebastopol, california
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: jrbarnett]
      #5502476 - 11/03/12 02:24 PM

Quote:

In keeping with the Ginger vs. Mary Anne discussion.

http://outreach.atnf.csiro.au/education/senior/astrophysi...




the discussion of the measurement of blackbody color using the difference in narrow bandwidth (filtered) illuminances is useful. on human color vision, not so much:

* photopic color sensitivity does not describe color sensitivity to stellar images at near or full scotopic adaptation
* stars are not "point" sources to begin with, and color is often examined visually as defocused stellar disks
* "small field tritanopia" is in fact a difficult effect to demonstrate experimentally, and is almost nonexistent in the perception of lights
* the "blackbody colors" of different stars presented as large visual areas on a computer monitor (which is designed to simulate the visual appearance of surfaces, specifically "white" as a white sheet of paper) has a very limited resemblance to the "colors" of stars, which are perceived as very small, bright lights against a very dark background
* more generally, color (especially saturation) is strongly dependent on overall luminance and on luminance contrast (color luminance vs. background luminance)
* stimulus color, objectively defined as a radiance or luminance profile, has little bearing on perceived color, due to a variety of compensatory and adaptive mechanisms in the visual response (e.g., "complementary contrast")
* the individual differences in color experience among *normal* observers are (in the judgment of a standard color text, published by the optical society of america) "enormous".

nothing can take away from the splendor of stars and the great enjoyment in observing their color variety. the "vision science" brought to bear on the analysis of star color does not seem to me up to the task, and consists mostly of claims and conclusions cobbled together in a way that is best described as conjectural.


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Tom and Beth
Post Laureate


Reged: 01/08/07

Loc: Tucson, AZ
Re: Almach or Raslagethi? (Ginger or Mary Anne?) new [Re: drollere]
      #5503876 - 11/04/12 12:47 PM

Nod goes to Almach

While Almach transited last night, I had a brief window to stretch my 10 inch scope at 500X (6MM). Did try to get any hint of the B component being double, but the sky wasn't seady enough for the 3.7MM.


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CollinofAlabama
Carpal Tunnel
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Reged: 11/24/03

Loc: Lubbock, Texas, USA
Re: Almach or Rasalgethi? (Ginger or Mary Anne?) new [Re: jrbarnett]
      #5513128 - 11/10/12 12:28 PM

Wow Jim, what a great and difficult question! I hope to have an urban Thanksgiving star party that Friday night the 23rd of November. What a GREAT contest for the evening. I only hope Rasalgethi's still high enough then to participate. As for Mary Anne or Ginger, I was such a young man and so busting at the seems that I'd almost have settled for Mrs Howell. Desertstars has my answer, and Pete L-H my sentiments on these two exactly. I'm afraid it would have simply come down to opportunity and circumstance, and not much more. But with such choices, why worry? I would gladly have Rasalgethi OR Almach; I'll let you know after I've had them both and am smoking a cigarette.

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jrbarnett
Eyepiece Hooligan
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Reged: 02/28/06

Loc: Petaluma, CA
Re: Almach or Rasalgethi? (Ginger or Mary Anne?) new [Re: CollinofAlabama]
      #5514265 - 11/11/12 11:06 AM

Incidentally, I'm a Rasalgethi man, myself.

- Jim


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Ziggy943
Post Laureate


Reged: 08/11/06

Loc: Utah
Re: Almach or Rasalgethi? (Ginger or Mary Anne?) new [Re: jrbarnett]
      #5517121 - 11/13/12 12:33 AM

Generally I prefer Alpha Hercules UNLESS the B component of Gamma Andromeda is wide enough to split. Seeing Almach as a triple is a real and rare treat. It's currently not doable.

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