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Doubles
to celebrate the Winter Olympics 2002
Salt Lake City, USA Alpha Ursa Minoris (Polaris) |
| John Ryan | ||||
| Star:
Alpha Ursa Minoris (Polaris)
Date & Time: Friday Feb. 8, 2002 Seeing: 8+ <1-10 Seeing Scale (10 best)> Location of site: Barreras, Salamanca, Spain Site classification: Rural,Suburban. Conditions: Clear, dark skies but with fairly heavy dew Sky darkness: 5+ <Limiting magnitude> Telescope: TeleVue 101 mounted on a Gibraltar AltAz mount Eyepieces: 6mm Radian and 14mm Radian Magnification: 90X, 40X
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This is the famous Polaris
which should be in the Olmpic doubles. How many times have I stared at
this star polar aligning my mounts. I always knew it was a double but never
tried for some reason to find the secondary. Last fall with the help of
Tim Leese at "Sena de Luna", I decided to find the faint secondary and
spent some time observing this double. The chanllege here is the magnitude
difference. Friday nite it was easier to find the secondary knowing where
to look. Found and split at 40X but better at 90X. Rating of 2 because
it is one of the most important primary stars in the heavens.
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| William Schart | ||||
| Star:
Alpha Ursa Minoris (Polaris)
Date & Time: 9th September, 2002. 7:00pm CST Seeing: --- <1-10 Seeing Scale (10 best)> Location of site: Killeen, TX, USA. Site classification: Suburban Sky darkness: --- <Limiting magnitude> Temperature: ~ 65F Other: some wind, but no clouds Telescope: Celestar 8" SCT Magnification:
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As I was setting up, the
first of several problems which plagued me tonight revealed itself: somehow
(and I have no idea how) the dec circle was displaced about 10d. By aligning
on Polaris, I was able to fairly accurately determine how much, a
fairly critical factor as one step in aligning the DSC is to set the scope
to Dec = 0 and enter.
With this problem disposed of, more or less, I proceeded to observe our friendly pole star. Although I look at this almost every time I observe in the process of setting up, it has been quite some time since I have observed it, and never with the C8. (This is one of the reasons why I nominated it.) This event went off at 7:44 pm CST. This pair was easy to split, even at low power. This judge found the primary to be a brilliant yellowish white, while the fainter companion was blue. I got the separation at 16.9", but did not attempt a measurement of the PA, which I felt would be unreliable this close to the pole. I was surprised at the number of faint, but still readily visible stars in the FOV. The secondary points to a
nice right triangle of faint stars, perhaps about
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| Eddy O'connor | ||||
| Star:
Alpha Ursa Minoris (Polaris)
Date & Time: Sunday February 10th. 9-10.30 p.m.local; UT +10 Seeing: 6 <1-10 Seeing Scale (10 best)> Transparency: 8 <1-10 Seeing Scale (10 best)> Location of site: Terara, New South Wales, Australia 150º.38 E, 34º 52 S Site classification: Sky darkness: <Limiting magnitude> Temperature: 17ºC Other: Moderate humidity, light breeze. No Moon. No snow expected! Telescope: 8" Newt. F9 Eyepieces: 25mm K, 20mm K, 12.5 mm Ortho. Magnification: 73x, 91x, 146x |
Unfortunately, with clouds
coming in from the south I decided that it
was time for the ultimate test:Alpha Umi, selected by William Schart. William is a tried and tested
observer who started life as a plane spotter and Texas Ranger and
finally decided a better cover would be a simple High School Mathematics
Teacher. He has fooled nobody. In recent years, and supported by a very
sympathetic wife, who copes well with a life of near penury,
he has started a fine collection of modern instrumentation and plies the
skies and records his
Comments: With the telescope adjusted to the correct altitude and assistanced by suitable lighting I spotted this fine double. The snails were closely entertwined and glistening in the light. The primary looked plump and of a clear Speckled Brown appearance while its companion was slightly brighter. The pair refused to separate so with a clear demonstration of the survival of the fittest I lofted them over the garden fence into an empty paddock, packed up my gear and retired to the welcoming atmosphere of the Apre-ski. |
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| Steve Bodin | ||||
| Star:
Alpha Ursa Minoris (Polaris)
Date & Time: 11 Feb 2002, 7pm to midnight Seeing: 5 -> 3 <1-10 Seeing Scale (10 best)> Transparency: Good Location of site: Silverdale WA, USA 47N,123W Site classification: Suburban Sky darkness: 5.7 -> 5 <Limiting magnitude> Telescope: Celestron 8 CS, Meade 4 SC Eyepieces: 24 Koenig, 19 Televue wide field, 12 ortho, 3x Barlow, PC23 videocamera Magnification: 125x |
This is an Olympic task
to get a fork mounted C8 on this target so enter the ETX mounted 4 in SC.
Surprisingly difficult in the little scope. Overwhelming brightness of
the primary, which I judged as a off white towards yellow giant. The extreme
blue of the companion makes this a pretty sight. Used 125x on the little
scope to clearly separate the components. I'll sneak in some video measures
from last summer made with 3 different magnification on my 17 in Dob. To
get a 270 deg drift for PA cal, had to wait 10 minutes to get a useful
drift line. Would have dragged out the big scope, but I sent the control
box in for a brain transplant to a goto mod thinking that there would only
be one clear night in February anyway!
Measures: 17.6 sec, PA 233 deg from last August
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| Tom Teague | ||||
| Star:
Alpha Ursa Minoris (Polaris)
Date & Time: 2002 February 12 (21:50) Seeing: 3 <1-10 Seeing Scale (10 best)> Location of site: Chester, England 53°11'08"N; 02°51'39"W Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Telescope: 63/840 (2½ inch) Zeiss refractor Magnification: x53, x84, x140
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Again, I found it at the
first attempt using my 'mental arithmetic' method. I had forgotten
just how elusive the companion can be in poor or mediocre seeing.
I was able to pick it out and hold it with a/v x53, x84 and x140.
Curiously, increasing the power did not seem to make this pair any easier,
despite the considerable magnitude difference between the two components.
The colour of the secondary has always seemed blue in my 8½ inch
reflector, but tonight I could see no definite colour using the little
Zeiss glass. The gallant Admiral Smyth, as might be expected, was
fascinated by Polaris as an historic aid to navigation. He saw the
colours as "topaz yellow and pale white". Webb makes the intriguing
point that the secondary was apparently seen by day with the great Dorpat
refractor of just over 9 inches aperture. The late and somewhat eccentric
Robert Burnham thought that 2½ or 3 inches of aperture would ordinarily
be required to detect it by night but added that his namesake, the great
S. W. Burnham, had managed it with 1.6 inches. Dawson, however, claimed
to have glimpsed it with just 1 inch, and T. T. Smith with 1¼ inch.
As the primary is pretty
bright, I decided to try it with my prismatic Zeiss pocket spectroscope.
Unfortunately, the seeing was just too bad for visual spectroscopy.
Using the same equipment in good seeing in the past, I have sighted many
dark features in the spectrum of this star, but on this occasion all I
could manage was a fleeting suspicion of a few absorption lines, mainly
in the green region.
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| Bob Hogeveen | ||||
| Star:
Alpha Ursa Minoris (Polaris)
Date & Time: February 12 - 2002, 22.30 Seeing: ~ 5 <1-10 Seeing Scale (10 best)> Location of site: Annen, The Netherlands 53º N, 6º E Site classification: Village-backyard Sky darkness: 4 <Limiting magnitude> Temperature: 5° C Conditions: Clouds with short clearings Telescope: Swarovski 80mm spottingscope Magnification: Magnification: 20x - 60x
Star: Alpha Ursa Minoris
(Polaris)
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This "center of our observing-universe"
showed itself as a very fine, even beautiful pair. Is it the ambiance of
The Olympics that made this pair so special tonight, or the more and more
stronger influence of "The Spirit"? Maybe just the brilliant image
the Swarovski gives...
Anyway, I announced Polaris as WINNER and accordingly raised its rating to 1! Of course prior observations
were made:
Polaris is a beautiful bright yellow star. At 60x the secondary is best seen as a sharp little pinpoint, nicely outside the glare of the primary. Zooming down showed me that (roughly) 40x was the limit for separating the pair. Using 20x shows that the
surrounding field is not as empty as one might expect. There is a circlet
of magn. 8/9 stars to one side and a small string of stars to the other
side of Polaris. Together they give the impression of a free floating balloon
with the bright Polaris as the knot in the balloon and the rope. The only
thing that is missing is the Olympic logo printed on the balloon...
I am always reluctant to
move a scope on a GEM to the region around Polaris, it is very difficult
to aim a scope because the movements along the RA-axis result in almost
nothing... But with the handy little MK-67 that is much easier then with
the bulky CG11.
Ambience: Only a short time
of observing. The clouds came in (to stay) at 21.00. This time I had the
CG11 and the MK-67 standing next to eachother for the first time (for observing).
My findings of Saturday about compairing these scopes were confirmed. The
seeing was no more than 5 and the Intes showed the same details on Jupiter
as the Celestron. Once the eye was accustomed to the very bright image
in the C11 or, on the other hand, to the dimmer image in the MK-67, the
details looked very much the same.
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| Tim Leese | ||||
| Star:
Alpha Ursa Minoris (Polaris)
Date & Time: 12 February 2002. 22:00 UT. Seeing: 4-5 <1-10 Seeing Scale (10 best)> Location of site: Northwich, Cheshire. UK. (53° 15' N -2º 33' W). Site classification: Suburban Sky darkness: 3 <Limiting magnitude> Conditions: Clear patches, high haze, light to moderate breeze. Telescope: 200mm f/6 Newtonian reflector, 80mm f/5 rich field refractor. Mounts: Vixen GP, EQ5 Eyepieces: 18mm orthoscopic. Magnification: X67 Star: Alpha Ursa Minoris (Polaris) Date & Time: 20-February-2002 ( 23:00 UT ) Seeing: 5-6 <1-10 Seeing Scale (10 best)> Location of site: Northwich, Cheshire. UK. (53° 15' N -2º 33' W). Site classification: Suburban Sky darkness: 3 ( UMi ) <Limiting magnitude> Conditions: Cold breeze, clear sky, Moon a slight problem. Telescope: 80mm f/5 rich field refractor. Mount: EQ5 Eyepieces: 5mm Lanthanum. Magnification: X80 |
I have observed Polaris
many times since obtaining my Newtonian telescope. I tend to use Polaris,
at high magnification, to fine tune the collimation of the primary mirror
of this telescope.
Tonight, Polaris bobbled
about like a beach ball in a force 10 gale. Even so, I could easily see
the companion using X67 magnification. The primary star appeared a pale
yellow colour with a bluish purple attendant. Using an apodising screen,
constructed by myself, I received an absolutely stunning view. Polaris
was seen in the centre of a spoke wheel effect of crudely diffracted star
light. The view
A brilliant view though.
This would make a good photo, I think. Must add a digital camera to my
long list essential astro stuff.
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