| William L. Schart | ||||
| Star: Albireo
Date & Time: 5/30/98 1:45 AM CDT Seeing: 6 <1-10 Seeing Scale (10 best)> Location of site: Killeen, TX (Lat 31 N, Elev 600 ft) Site classification: Suburban Sky darkness: 5.0 <Limiting magnitude> Telescope: Orion 6" Dob. Magnification: 48x, 72x, 120x Star: Albireo Date & Time: 7/7/99 12:45 AM CDT Seeing: 5 <1-10 Seeing Scale (10 best)> Location of site: Killeen, TX (Lat 31 N, Elev 600 ft) Site classification: Suburban Sky darkness: 3.5 <Limiting magnitude> Telescope: Bushnell 8x21 binocs. Magnification: 8x Star: Albireo Date & Time: 7/15/00 9:37 pm CDT Seeing: 6 <1-10 Seeing Scale (10 best)> Location of site: Killeen, TX (Lat 31 N, Elev 600 ft) Site classification: Suburban Sky darkness: 2 <Limiting magnitude> Telescope: Tasco 10x50 binocs Magnification: 10x Star: Albireo Date & Time: 7/18/00 11:29 pm CDT Seeing: 6 <1-10 Seeing Scale (10 best)> Location of site: Killeen, TX (Lat 31 N, Elev 600 ft) Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Telescope: Orion 6" Dob. Magnification: 32x, 72x, 120x, 98x |
Just barely seen with naked eye, making this eay to find.
Nice gold and deep blue pair.
[Update from 6/16/99 at 22:53 PM CDT using 32x and 98x:] A very pretty pair, yellow and blue. Separation 34”, PA 120°. I was barely able to split this, in part due to the inability to hold the binocs perfectly still. However , the yellow/blue color contrast was quite clear. Close but definate split at this power. The primary is a strong yellow, the secondary is a faint blue. Always a pretty sight, yellow and blue, easily split at any power. Separation measured at 32”, PA 54d (published 34.3, 54d). |
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| Luis Argüelles | ||||
| Star:
Albireo
Date & Time: 8 July 1999, approx 21:05 UT Seeing: 7.5 <1-10 Seeing Scale (10 best)> Location of site: Soano, Cantabria, Spain. Altitude ~ 15 mts over sea level. Site classification: Suburban Sky darkness: 2.0 <Limiting magnitude> Telescope: Vixen 102M, 4" achromatic refractor Magnification: 50x, 100x (Eudiascopic 20mm and 10mm) Star: Albireo Date and Time: 19, July, 2000. 22:16 UT Seeing: 6.5-7 <1-10 Seeing Scale (10 best)> Sky darkness: 2.5 <Limiting magnitude> Transparency: 3 Temperature: 16C, light breeze Location of site: Quintueles, near Gijón, Spain Site classification: Suburban Telescope: Vixen 102M, 4" achromatic refractor Eyepiece(s): Eudiascopic 20 and 5mm Magnification(s): 50x, 200x |
What to say about this star?. A lot of people claim this
is the most beautiful double star in the Northern hemisphere. I perfectly
observe it with the 20 mm. Eudiascopic eyepiece (50x), noting the brightest
component as orange, while the weakest one is white-blue. I also observe
it at 100x, but the field of stars in Cygnus is nicer using only 50x.
I started the observation directly at 200x (a Skysensor 2000 allows such luxury and exotic things) noting the typical orange and blue coloration. Anyway, I’ve always said that the best suitable magnification in order to enjoy this beautiful double is 50x. The components appear in all their glory with a rich field as a background.
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| Pino Bandini | ||||
| Star: Albireo
Location of site: Ravenna, Italy Date of observations (UT): 29/06/2000 – 20.20 UT Site classification: Urban Sky conditions: Seeing: (10 best) Temperature: 25C Limiting visual magnitude: -- Telescope: Celestron C8 Magnification: 81x (plossl 25 mm) |
the faintest pretty blue, the main gold-yellow.
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| Ilario Melandri | ||||
| Star:
Albireo
Date & Time: 6/7/2000 – 20.10 UT Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: Italy, Ravenna, San Romualdo, Lat 44 32’N Lon 12 08’E Elevation: 0 m Site classification: Rural Sky darkness: 2 <Limiting magnitude> Temperature: 23C Telescope: 150 mm f/15 achromatic refractor (lens by Romano Zen, Venice). Magnification: 140 x (eyepiece Clave Plossl 16 mm) |
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| Tim Leese | ||||
| Star:
Albireo
Date & Time: 16 July 2000 (2100-2330UT) Seeing: <1-10 Seeing Scale (10 best)> Location of site: Cheshire. UK Site classification: Suburban Sky darkness: 3 <Limiting magnitude> Telescope: 200mm f/6 Newtonian scope mounted over a Vixen GP mount (manual slow motion). Magnification: X48 up to X324 |
I spent about an hour observing this system to get an
impression of the colours received to the eye.
Using all the magnification combinations at my disposal the overall colours were perceived as a pale yellow to yellow/orange for the primary and pale blue to blue for the secondary. The lowest magnification used was X48 all the way up to X324. Using X324 I measured the PA of the secondary to be 53deg with a SEP of 33.7sec (Tom's standard method). I found Tom's method for measuring PA easier to use than my usual 360deg device fixed to the barlow lens with a pointer attached to the eyepiece. Both methods gave similar results though. |
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| Mary Flanagan | ||||
| Star:
Albireo
Date & Time: 18 Jul 2000 03:53 UT; 17 Jul 10:53 CDT Seeing: 8, later deteriorating to ~5 <1-10 Seeing Scale (10 best)> Transparency: 8; moon just past full <1 - 10> Location of site: Apple Valley MN, USA 93d 14m 25s W; 44d 45m 17s N Site classification: Suburban Sky darkness: 3 <limiting magnitude> Telescope: 8" f/6 Dobsonian Magnification: 37x |
This was my first-ever double, and it never gets old.
Gorgeous orange-tinged gold with a deep purplish-blue secondary at 37x.
I've tried this at higher magnifications, but think the color contrast
is best at lower ones.
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| Penny Fisher | ||||
| Star:
Albireo
Date & Time: 7/18/00 9:00 p.m. EDT Seeing: 2 <1-10 Seeing Scale (10 best)> Transparency: 5 Location of site: Englishtown NJ, 40.25 N 74.333 W Site classification: Suburban Sky darkness: 4.0 <Limiting magnitude> Telescope: 12.5" Discovery Dobsonian Magnification: About 50X
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We observed the best double in the sky while looking through
a shroud of cloud cover for Comet S/4 1999 Linear.
With this aperture, Albireo appeared three dimensional. The primary
was a creamy orange in color and slighly brighter than it's sky-blue secondary.
Both stars glow, rather than give off diffraction spikes or fade dimly
into the background.The three dimensional effect to me appears as though
the blue star is floating in space a bit behind the A star, rather than
a static side-by-side. I know this is probably an effect of the slight
magnitude difference, and probably also color difference, since this system
is physically bound.
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| John M. Ryan | ||||
| Star:
Albireo
Date of Observation: 19/07/00 22:30UT Location of Observation: Ciudad Rodrigo, Salamanca, Spain 40º 36' N, 6º 32'W, Elev. 800 Meters Seeing: 5 (1 - 10, 10 best) Transparency: 7 Limiting Mag. (naked eye): 3+ Site classification: Urban Instrument: Meade 8"SCT Magnification: 62X (32mm plossl) and 160X (Microguide). |
Separation (Clear or Touching):Clear
Magnitude Comment: Both in accordance with the data. Color Comment: Gold and Blue. General Comment: In measurement with the Microguide I arrived at a distance of 35.5 arcsecs and a PA of 55.5º compared to 34.3 arcsecs and a PA of 54º. This is one of the most beautiful doubles in the sky. For the doubles in Cygnus it is almost mandatory to start with Albireo. |
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| Bill Reinehr | ||||
| Star:
Albireo
Date & Time: July 20, 2000 05:00 UTC Seeing: 7+ (fairly still) <1-10 Seeing Scale (10 best)> Location of site: Pflugerville, Texas, USA (30 degrees N.) Site classification: Suburban Sky darkness: 4.0 <Limiting magnitude> Temperature: 79 F. Telescope: Vixen 80mm Fluorite, f/8 on Custom D altaz mount Magnification: 29x (22mm Vixen SW) |
An easy split at 29x. Very attractive - gold and blue.
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| Richard Harshaw | ||||
| Star: Albireo
Location of site: Northern Kansas City, Missouri (USA). 94d 30m west longitude, 39d 15m north latitude 980 ft above Mean Sea Level Date of observations (UT): July 22, 2000; 0230 hours Site classification: suburban Sky conditions: seeing-- 8 out of 10 transparency-- 8 out of 10 limiting visual magnitude-- 4.5 mag Telescope: Celestron C-8 Eyepiece: 12.5mm (MicroGuide), 166x |
Magnitudes: 3.1, 5.1
Sep/PA's: 35" @ 54 Year of measurement: 1982 Distance (light years): 386 Luminosity (in suns): 800 Eyepiece and magnification: 12.5mm (MicroGuide), 166x Colors noted: Y!! and pB!! Set in a stunningly rich field, this pair has always been my favorite (for its sheer beauty). I made six pairs of separation and PA measures using the Micro-Guide and got an average of 37.8" in PA 53.8. (It should be noted that the separation is increasing and the PA decreasing from the 1982 measurement. First measure: 34.3" @ 56.) The A star is a spectroscopic binary and an infra-red source.
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| Eddy O'Connor | ||||
| Star: Albireo
Date & Time: July 24th 2000, 10 p.m local; UT +10 Seeing: 6 <1-10 Seeing Scale (10 best)> Transparency: 8/10 Temperature: 15oC. Dew Location of Site: Terara, New South Wales, Australia, Long.150.38 degrees; South 34.52. Site Classification: Suburban Sky darkness: 5.5 <Limiting magnitude> Instrument: 7x Binoculars Magnification: 7x |
What can be said about this gem apart from the fact that
it is probably the first childhood double and the mainstay of the small
aperture club. I recorded the colours as Yellowish Orange and Light Blue
and after seeing the split in my
finder I decided to try the binoculars. I used the old trick of inverting the garden rake, propping the binoculars on the teeth and jamming the handle in the ground, made the binoculars quite steady. Not recommended for the under fives ;-| Very clearly at X7 Albireo was just split. This would make a good eyesight or binocular test and would certainly keep the neighbours interested. |
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| Patrick J. Anway | ||||
| Star: Albireo
Date & Time: 25 Jul 2000 23:37:47 -0400 Seeing: 7 <1-10 Seeing Scale (10 best)> Location of Site: Munising Michigan USA Site Classification: Rural Sky darkness: 5.5 <limiting magnitude> Sky condition: No moon; high clouds/haze Temperature: 72*F, 22*C Telescope: Zeiss Telementor 63mm, f/13.3 on equatorial mount Magnification: Vixen 12.5mm orthoscopic
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Split easily. A lovely contrasting double with the primary
being deep yellow and the secondary ashy blue. Following Eddy's lead, I
tried with my binoculars and was able to split it cleanly at 11X.
The color differences were still apparent though lighter. While I was at it, I checked on an old favorite - the "coathanger"- marvelous asterism and also checked on comet LINEAR S4. It was somewhat washed out by the haze, but still showed a short beard. Sitting right alongside a star - best estimate to be 47 UMa.
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| Cor Berrevoets | ||||
| Star:
Albireo
Date & Time: 13 august 2000, 23:20 MET / 21:20 UTC Seeing: 6 <1-10 Seeing Scale (10 best)> Location of site: Ritthem, The Netherlands, EU Site classification: Rural Sky darkness: ~4 <Limiting magnitude> Temperature : 20 C Telescope: Intes Micro 603 150/1500 (MCT) on CG-5 mount with dual-drive. Magnification: Televue 26 mm (magn:58x), Antares 10 and 15 mm with 2.4 Intes Barlow (58 - 360x)
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This is a beautifull pair, starting at 58x I could allready
see a hint
of the bluish secondary whilst the primary was cleary golden yellow. At higher magnification, especially above 200 the colours of the secondary were more clear.
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| Tom Teague | ||||
| Star:
Albireo
Date & Time: 19 August 2000 (2130) Seeing: 7 <1-10 Seeing Scale (10 best)>. Location of site: Chester, England (53 11 08N; 02 51 39W) Site classification: Suburban Sky darkness: 4.5 <Limiting magnitude> Telescope: 63mm Zeiss Telementor refractor Magnification: x53, x84, x140 and x210 |
Superb colour contrast at all powers. Primary is golden yellow, secondary
appears blue with a hint of turquoise.
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| Luis and Salvador Lahuerta (G.E.O.D.A) | ||||
| Star: Albireo
Date & Time: 14th Sep 2000 Seeing: 7 <1-10 Seeing Scale (10 best)> Location of site: Manises, Spain 39º 29' 36" N // 00º 27' 56" Site classification: Urban to suburban Sky darkness: 3 <Limiting magnitude> Telescope: Meade S/C LX200 10" Eyepieces: diagonal prism, MA 12 mm astrometric eyepiece (both fromMEADE).
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Primary colour: yellow
Secondary colour: blue Separation: 34.7” PA: 54.0º Comments: None
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