| Richard Harshaw | ||||
| Star: Struve 3050
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): UT: 02:15 of Sept. 16, 2000 Site classification: suburban Sky conditions: seeing-- 4/10 up to 8/10, in short spans of time transparency-- 8 out of 10 limiting visual magnitude-- 5.0 mag Telescope: Celestron C-8 Eyepiece: 10mm + Barlow (516x) |
Position: 2359+3344
Magnitudes: 5.8. 6.6, 12.9 Sep/PA's: AB = 1.8 - ! / 320 + !! ; AC = 81 / 293. Year of last measurement: 1991 Distance (light years): not known Luminosity (in suns): not known Eyepiece and magnification: 10mm + Barlow (516x) Colors noted: Both yW (in agreement with Webb), while C was too dim to say for certain. The orbital period is 355 years (Heintz, 1974). First measured: 3.8" @ 191. 1914 (Phillips): 2.1" @ 222. I would rate this pair 2 on my 1-5 scale. Nice challenge, Luis! |
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| Jim Jones | ||||
| Star:
Struve 3050
Date & Time: 05:08 UTC, Sept 17, 2000 Seeing: 7 <1-10 Seeing Scale (10 best)> Location of site: Lake Oswego, Oregon, USA Site classification: Suburban Sky darkness: 3.8 <Limiting magnitude> Telescope: 8 inch LX50 SCT Eye Piece(s): 18 mm Radian, 2x Ultima Barlow Magnification: 224x, 336x |
Est PA without instrumentation....170d or 350d
Equal Magnitude. Equal Color....yellow. I used my analog setting circles and took my departure from Alpha And. On this night of excellent seeing this close pair makes a pretty sight at 336x with the two equal magnitude stars and their diffraction rings. Took a look at 47x hoping to see the field stars. Unfortunately, the rising moon really washed out the field. |
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| William L. Schart | ||||
| Star:
Struve 3050
Date & Time: 9/18/00 9:00 pm CDT Seeing: 8 <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, 98x, 120x, 240x |
Found by moving up from alpha And. Near a Y-shaped asterism
and part of a triangle. By far and away the most challenging to split so
far. At 98x, I suspected something, at 120x it seemed a bit more definate
and with the barlow at 240x, was definate. Too close to make a measurement.
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| Tom Teague | ||||
| Star:
Struve 3050
Date & Time: 2000 September 18 (21:15) Seeing: 6 <1-10 Seeing Scale (10 best)>. Location of site: Chester, England (53 11 08N; 02 51 39W) Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Telescope: 63mm Zeiss Telementor refractor Magnification: x140, x210 |
I could detect no colour difference in this pair. Both stars
appear white to me. I would normally expect to be able to separate
it quite easily with my little Zeiss, but the seeing just wasn't good enough
tonight. I saw it as separated/tangential x140, and figure-of-eight
x210. I estimated the PA at 320 degrees, which turns out to be practically
spot-on!
Ambience: cold, still, autumnal. |
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| Tim Leese | ||||
| Star:
Struve 3050
Date & Time: 20-September-2000 (23:20 UT). Seeing: 6-7 <1-10 Seeing Scale (10 best)> Location of site: Cheshire. UK 53° 15' N –2º 33' W Site classification: Suburban Sky darkness: 3.5 <Limiting magnitude> Telescope: 200mm f/6 Newtonian scope mounted over a Vixen GP mount (manual slow motion). Any Quoted PA or SEP using micro guide. Magnification: X120, X240 |
Another close pair of stars of almost equal brightness.
This was a challenging split using X120 magnification as the seeing seems
to have deteriorated. In moments of steadier air a superb view was obtained,
a classic view of a double star in my opinion.
Increasing the magnification to X240 an estimate ( very rough ) of the PA between the two was found to be about 310-320deg or should that be 130-140deg, couldn't tell which was A or B!!. Steadier air and a higher magnification would produce, I think, a truly superb view. |
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| Ilario Melandri | ||||
| Star:
Struve 3050
Date & Time: 21/09/2000 – 20.20 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: 5 <Limiting magnitude> Temperature: +14C Telescope: 150 mm f/15 achromatic refractor (lens by Romano Zen, Venice). Magnification: 140x (Plossl 16mm) |
The separation is decreasing, it will be 1.2” in 2020, with PA 5.
Now sep. is 1.7” and distance 95 light years. The distance between the two components corresponds at about 50 Astronomical Units, almost 10 times the distance Sun-Saturn. |
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