| Philippe Dejocas | ||||
| Star:
Izar (Epsilon Bootis)
Date & Time: May 01 2001 Seeing: 6.5 <1-10 Seeing Scale (10 best)>. Location of site: Ottawa/Hull, Canada Site classification: suburban, urban Sky darkness: 4.2 (UMI) <Limiting magnitude> Temperature: 15ºC/9ºC (beg/end) Winds : ~10, 15Km/h S/SW Humidity : ~40% Sky : Moon at first quarter and in Leo; sky is a nice dark blue with just a trace of haze Telescope: Aldebaran 6" f5 Newtonian Magnification: 120x |
Suffered from the seeing
which robbed it of its beauty, but did not prevent complete resolution
at 120x.
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| Jim Jones | ||||
| Star:
Izar (Epsilon Bootis)
Date and Time: 05/03/01 0449 UTC Seeing: 6-7 <1 worst - 10 best> Location of Site: Lake Oswego, Oregon Site Classification: Suburban Sky Darkness: 4.1 <Limiting Magnitude> Moon: 0.773 Telescope: 8 inch LX50 SCT Magnification: 112x, 224x, 285x Eye Piece(s): 18mm Radian, 2x Ultima, 7mm ortho |
Est PA without
inst......350º
Fat fuzzy star at 112x. Fuzzy peanut at 224x. Clear split at 285x. |
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| Stuart | ||||
| Star:
Izar (Epsilon Bootis)
Date & Time: 3rd May 2001 2230 UT Seeing: 5-6 <1-10 Seeing Scale (10 best)>. Location of site: Near Halifax, West Yorkshire, England Site classification: suburban Sky darkness: 4.2 (UMi) <Limiting magnitude> Temperature: -1C Telescope: GX 250 10" Newtonian Eyepiece: 20 mm Plossl, 9.5 mm Ortho, 7.5mm Plossl with Barlow . Magnification: x60, x126, x160, x252 |
Thought I would take a first ever look at this celebrated star knowing that it would, sadly, have to be my last of the session. Unsuprisingly I could not resolve it at x60, but there was some evidence of a dim elongation, I thought. This was not confirmed at x126. Then at x160 the components were obvious but not separated. At x252 a clean, continuous split and I undersood why Struve called this system Pulcherrima. A beautiful sight , the primary deep yellow and the much fainter comes a mauvy blue to me. No sign at all of the greenish colouration referred to in Burnham. For me, one to return to often. Suprised that the secondary shows up so well given the difference in magnitude and the separation. | |||
| Rafael Barberá | ||||
| Star:
Izar (Epsilon Bootis)
Date & Time: 5/5/2001, 21:42 Seeing: 6 <1-10 Seeing Scale (10 best)>. Location of site: Manises, Valencia, Spain Site classification: Urban Sky darkness: 3.5 (almost full moon) <Limiting magnitude> Telescope: TV85 85mm F/7 F.L.: 600mm Eyepiece: Eudascopic 5mm Magnification: 120x |
I wasn't ready to see this
star ;-). At 120x I can see two discs full of
colour. The brighter one seems yellow-orange with the dimmer one green or blue. The contrast was stunning!. I can convinced myself that the stars seems "strange" at 48x, but I need 120x to clearly split them. A very good example of colour contrast. I was surprised by a Difficult Index of 90.2 for this star, it was easy with a 85mm. |
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| Otto Piechowski | ||||
| Star:
Izar (Epsilon Bootis)
Date & Time: 5/5/01 2 am EDST Seeing: 8 <1-10 Seeing Scale (10 best)>. Location of site: Lexington, Kentucky Site classification: suburban Sky darkness: 3 (I could not see Polaris with unaided vision) <Limiting magnitude> Other: Hazy, still Telescope: 150 mm mak-cass (MK 67 standard) Eyepiece: 7, 5, 4 mm orthos with 2X barlow Magnification: -- Star: Izar (Epsilon
Bootis)
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Separation was visible with
all eyepieces and the barlow in all combinations. The best view was
with the 5 mm UO orthoscopic. The double presented itself as a very blue
secondary with a yellowish white primary. The secondary seem to fall on
what would have been the second diffraction ring. The double did not give
as pleasing a view at any higher magnification.
It is an odd thing.
Not only is zeta more difficult to split, but the stars just seem smaller
than the pair of epsilon. Not just that epsilon is easier to split.
zeta's seem smaller. Maybe it is just an illusion created by fainter
stars since there is less light scatter.
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| Bob Hogeveen | ||||
| Star:Izar
(Epsilon Bootis)
Date & Time: May 07 2001 Seeing: 6 <1-10 Seeing Scale (10 best)>. Location of site: Annen, The Netherlands (53ºN, 6ºE) Site classification: Village backyard Sky darkness: 3.5 (UMI) <Limiting magnitude> Sky : Full Moon in Libra and a slight haze Telescope: Meade LX10 (8" f/10 SCT) Magnification: 100x, 200x Harschaw's Scale: 3 <1 to 5> |
This double needs 200x for
a good split. With the present sky-conditions it is now and then split
at 100x. The colors are nice! A is a deep yellow and B blueish. I am sure
this pair gets (and deserves) a better rating with better sky-conditions.
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| Cor Berrevoets | ||||
| Star:
Izar (Epsilon Bootis)
Date & Time: 10-may-2001 20:00 - 21:30 UT Seeing: ? <1-10 Seeing Scale (10 best)>. Location of site: Ritthem, The Netherlands 51° 27' N, 003° 38' E Site classification: Suburban Sky darkness: 4.5 <Limiting magnitude> Telescope: Intes Micro 6" F10 Maksutov (35% obstruction) Eyepieces: 7.5, 10, 15, 20 and 26 mm Plössls Magnification: 100x, 200x |
In my 15mm EP (~100x) this
double could be barely split, at 7.5mm (200x)
the primary showed orange/golden colour and the secondary grey-bluish colours. The first diffraction-rings seemed to be touching each other. |
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| John M. Ryan | ||||
| Star:
Izar (Epsilon Bootis)
Date & Time: 11 May 2001 ( 22:30 UT ). Seeing: 7 <1-10 Seeing Scale (10 best)>. Location of site: Barreras, Salamanca, Spain. Site classification: Rural,Suburban. Sky darkness: 4 <Limiting magnitude> Sky: Moon rising, fairly dry and calm. Telescope: Meade 8" SCT Eyepieces: 20mm plossl, 7mm ortho Magnification: 100X and 286X |
This first double turned
out to be the jewel for the night. There was elongation at 100X with
the 20mm and then a clean split with the 7mm ortho at 286X. The color contrast
of this famous double is fantastic. I found the primary to be gold and
the secondary blue. Nice contrast of both colors and magnitudes. I rated
this as a 1 on the Harshaw scale of 1-5 with 1 the best.
Ambience: The news reports last week have commented that this has been the wettest and cloudiest weather in Spain in the last 100 years. They went on to say that parts of Spain now resemble Ireland or Scotland with the abundance of grass and flowers. The cattle and sheep ranchers love the weather. Luis has commented last week that it has been about 100 days since he had a chance to get out and do some observing. Most of last week was cloudy and when the weatherman announced that Friday would be about a one day break before the next low pressure system arrived. I decided to get out to the village and do some observing. The temp. was about 10ºC when I started and dropped to about 5ºC. The frogs continue their croaking and about 11:00pm Pascual passed by with his large band of sheep and herding dogs which made a racket for about five minutes. |
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| Tim Leese | ||||
| Star:
Izar (Epsilon Bootis)
Date & Time: 12 May 2001 ( 21:30 UT ) Seeing: 5-6 <1-10 Seeing Scale (10 best)>. Location of site: Cheshire. UK 53° 15' N -2º 33' W Site classification: Suburban Sky darkness: ? <Limiting magnitude> Conditions: Nice clear night, looking good. Telescope: 200mm f/6 Newtonian mounted over a Vixen GP mount (manual slow motion). Eyepieces: 9mm, 6mm UO Orthoscopics X2 shorty barlow. Magnification: X133, X200 X400 |
Using X133 I could only
get elongation for this pair. Increasing the magnification
to X200 was a difficult split but I could see a very nice pair of cleanly separated stars in the pockets of steadier air. The primary appeared to be a golden yellow colour with the companion having a bluish hue. Using X400 confirmed the
separation of the pair and the colour contrast but the view was very poor.
X200 gave the best view for this system.
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| William Schart | ||||
| Star:
Izar (Epsilon Bootis)
Date & Time: May 12, 2001, 9:22-11:08 pm CDT Seeing: 8 <1-10 Seeing Scale (10 best)>. Location of site: Killeen, TX, USA 31ºN, 97ºW Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Conditions: Nice clear night, looking good. Telescope: Celestron 8" SCT Eyepieces: 25 mm, 17 mm, 12.5 mm (MG) Magnification: 80X, 117X, 160X |
A very bright primary with
a much fainter secondary. Only a suspicion of elongation at low power,
at mid power I was pretty sure there was a bump on one side, which was
confirmed with a split in the MG. SEP 2.4”, did not attempt the PA.
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| Chuck Shinn | ||||
| Star:
Izar (Epsilon Bootis)
Date and Time: 05/22/01 UT: 0300-0445 Seeing: 6 <1 worst - 10 best> Location of Site: Northern Texas (USA) Site Classification: Suburban Sky conditions: Clear with no moon Sky Darkness: 4.5 <Limiting Magnitude> Transparency: 7 out of 10 Telescope: Questar 3.5 (90mm) Maksutov Magnification: Up to 260X Eye Piece(s): From 24mm to 8 mm with and without barlows |
no splits.
Try again tomorrow-First diffraction ring jumping like crazy. Colors noted: None noted |
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| Ilario Melandri | ||||
| Star:
Izar (Epsilon Bootis)
Date & Time: 26 May 2001, 19.32 – 21:08 UTC Seeing: 8 <1-10 Seeing Scale (10 best)>. Location of site: S.Romualdo, Ravenna, Italy. Elevation: 0 m Site classification: rural Temperature: +19ºC -> +16ºC Sky darkness: 4 <Limiting magnitude> Telescope: 150mm f/15 achromatic refractor (lens by Romano Zen, Venice) Eyepieces: Clave Plossl 16 mm Magnification: 140x |
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| Thad Robosson | ||||
| Star:
Izar (Epsilon Bootis)
Date and Time: 5-29-01, 3:30UT Seeing: 7 <1 worst - 10 best> Location of Site: Phx, Az, USA Site Classification: Suburban Sky conditions: Clear and nice. Nearly 1rst quarter Moon Sky Darkness: 4 <Limiting Magnitude> Telescope: Meade 90mm ETX Magnification: 250x Eye Piece(s): 2x barlow, 32mm Meade SuperWide, 10 & 15mm Vixen Lanthanums |
Started my
night with the biggest challenge. Kept bumping up the power until I hit
250x. I saw a slight nodule on one of the diffraction rings that
passes as the comp. at an est PA of 330*. No colors noted.
Rated a 2 on the HS for the challenge.
Ambiance: Traffic noise as
the masses rushed home to unpack before rushing back to work the next morning.
Dogs weren't interested in what I was doing. A cool light breeze
helped make it very comfortable. No Gunshots, no emergency vehicles.
A quick, quiet outing.
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| PJ Anway | ||||
| Star:
Izar (Epsilon Bootis)
Date & Time: May 30, 2001 03:00 UT Seeing: 7 <1-10 Seeing Scale (10 best)>. Location of site: Munising Michigan, USA Site classification: Rural Sky darkness: 5.6 <Limiting magnitude> Sky condition: 1st quarter moon. no clouds Temperature: 37°F, 3°C Telescope: Zeiss AS 100mm f/10 refractor on equatorial mount Eyepieces: 40mm plossl, 25mm, 12mm & 7mm orthoscopics, 2.4X Dankin barlow Magnification: 25X, 40X, 83X, 143X, 200x, 343x
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I first tried at 83X, then
at 200X but could not detect a split. Using the
7mm and barlow at 343X the pair split cleanly. What a sight! A gold-yellow primary with a slate blue secondary near the first diffraction ring. A very lovely double, I was mesmerized by it. Definitely the highlight of the night, it was quickly added to my favorites list. Historical references:
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