| Bob Hogeveen | ||||
| Star:
15
Persei (eta Persei)
Date & Time: November 7, 2002 Seeing: 6 <1-10 Seeing Scale (10 best)> Transparency: 8 <1-10 Seeing Scale (10 best)> Location: Annen, The Netherlands 53ºN, 6ºE Site classification: Village backyard Sky darkness: 5 <Limiting magnitude> Conditions: many clouds with some clearings Telescope: Swarovski AT80 (80mm birdwatchingscope) Eyepieces: Swarovski 24mm - 8mm zoom Magnification: 20x, 60x Harshaw Scale: 1 <1-5; 1 best> Star:
15
Persei (eta Persei)
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With the eyepiece
set at 20x and the scope pointing high into the sky the Swarovski showed
me the pair very well.
What a beautiful sight! A bright light-orange primary and a small pinpoint secondary. Eta Per was already on my list as favourite, observed with several other scopes, but never before with the Swarovski. And again it proves to be a favourite. Using the highest power of 60x the pair becomes almost too wide, but still very pretty because of the striking color of the primary and the large difference in brightness of the stars. The more faint C-component could not be discovered. At 60x field stars of mag. 10.5 were easily visible, but the mag. 9.9 companion remained unvisible. The observation was a short one however, constantly interrupted by clouds and even some rain 5 minutes later. Maybe a more careful and lengthy observation will reveal something... + ----------------------------- + Just now I had a quick glance
at Eta Per, and yes, our mystery star is there!
It proved to be not difficult
to see C, but averted vision is absolutely necessary. 180x, using a 10mm
plossl proved to be the best for viewing C, after a few minutes of observing
C almost stood out with direct vision, but it was also visible with 60x
and 90x. 3 surrounding fieldstars (or D,E,F components) show a bit better,
but that's
GSC-3704-0119, mag. 10.8
at 1' 50"
Having a good look at C showed
that is was about the same brightness as
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| Rafael Barbera | ||||
| Star:
15
Persei (eta Persei)
Date & Time: 10 November 2002 From 19:00 to 20:00 Seeing: 6 <1-10 Seeing Scale (10 best)> Transparency: 6 <1-10 Seeing Scale (10 best)> Location: Manises (Valencia), Spain Site classification: Sky darkness: <Limiting magnitude> Conditions: Warm night (18º) with a little wind from west Telescope: Intes Micro Alter M500 (5" f/10 Maksutov) Eyepieces: Widescan II 30mm, TV Ploss 20mm, Intes WA 12mm, 15 and 10mm Eudascopics Magnification: |
The primary
was a beautifull orange star with a little white companion with
some tints of blue, surely caused by contrast. It was a so much wide stat to call it double for me, but was a good view with the 30mm (about 45x). Then I take a look at the list and see that this star was triple!. Ups! the B component was listed at 8.5mag and the C component at 9.9mag. I can't see nothing of about mag 10 at the listed position. I can see some dimmer components but more distant that the 66.6". For the comparation I take a look at Epsion Lirae. Midway there are a 10.43mag star that I can see without trouble. There are a distant 11.4mag one that I can glimpse with adverted vision. Taking in account that Perseus was lower on the horizont, I can say that there are nothing over 10.5 mag near the estimated position for component C. This morning I take a look at the field arround Eta Perseus on Guide. I can identifie the two field stars as GSC 3704 119 at 10.8mag and GSC 3704 346 at 10.9mag. But any of them are outside the 66.6" circle, at about 1.85' and 1.4' respectively.
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| Steve Bodin | ||||
| Star:
15
Persei (eta Persei)
Date & Time: 12 Nov 2002, 10:30pm - midnight Seeing: 3 <1-10 Seeing Scale (10 best)> Transparency: Good Location: Silverdale WA USA, 47N, 123W Site classification: Suburb-rural Sky darkness: 4.5 <Limiting magnitude> Conditions: Telescope: Celestron C8 Eyepieces: 24 mm Koenig, 3x barlow Magnification: 80x, 240x Additional: PC164C videocamera at prime focus |
Visually
a great sight, orange primary a the field peppered with faint blue companions.
The bad seeing was very apparent at 240x, with boiling stars. I think this
limited the magnitude visible since the stars were so spread out. The CD
components were visible, but D was very difficult. Many other stars in
the field of view too.
Measurements
made with the C8 and videocamera at prime focus since the air was too poor
for higher powers and the measure of CD is poor. The D component is definitely
closer to mag 12, the C8 limit, than mag 10. Measurements:
AB 28.82 sec at 300.8 deg PA; AC 68.52 sec at 271.0 deg PA; CD 5.58 sec
at 136.0 deg PA
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| Bernie Akent | ||||
| Star:
15
Persei (eta Persei
Date & Time: Nov 17, 2002 Seeing: 4 <1-10 Seeing Scale (10 best)> Transparency: -- <1-10 Seeing Scale (10 best)> Location: Austin TX 30º22'45"N; 97º49'32" W Site classification: Sky darkness: 3.8 <Limiting magnitude> Moon: about 90% Conditions: Very light. Wind Temp:. ~ 60 degrees F Telescope: Takahashi Mewlon 250 Eyepieces: Televue 4x Powermate; Nagler 22mm; Celestron 12.5mm Microguide Magnification: |
The
AB pair is a nice Yellow/Blue pair somewhat reminiscent of Albireo though
of a lesser magnitude. I could see six stars relatively close in
this grouping. After the ABC components two are similar in brightness
to the C component and one is a bit dimmer.
Measures:
AB: Separation 28.7", PA 301 deg. AC: Separation 70.8", PA 272 deg
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| William L. Schart | ||||
| Star:
15
Persei (eta Persei
Date & Time: 20, November, 2002 Seeing: 6-7 <1-10 Seeing Scale (10 best)> Transparency: -- <1-10 Seeing Scale (10 best)> Location: Killeen, TX, USA Site classification: Suburban Sky darkness: 3.5 <Limiting magnitude> Conditions: a bit warm, no wind Telescope: Celestar 8" SCT Eyepieces: Magnification: |
A
pretty, brilliant yellow primary and a fainter blue secondary. I can also
make out, very faint but definate, the third member of the trio, forming
a nice little triangle pointing to the W. Separation
29.8”, PA 301.8 (ave of 5 meas.).
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| Tim Leese | ||||
| Star:
15
Persei (eta Persei)
Date & Time: 9th December 2002 (21:00UT) Seeing: 5 <1-10 Seeing Scale (10 best)> Transparency: <1-10 Seeing Scale (10 best)> Location: Northwich, Cheshire. UK. (53° 15' N -2º 33' W). Site classification: Suburban Sky darkness: 4.2 (Umi) <Limiting magnitude> Conditions: Clear with a cold annoying breeze Telescope: 4inch f/15 Vixen refractor. Mount: EQ5. Eyepieces: 9mm Orthoscopic. Magnification: X167 |
After a long
search, I found this double star, my fist project star using this telescope.
Having such a long tube meant that I was crouching down on my hands and
knees attempting to peer through the finder scope not 2 feet off the ground.
The reward came with a stunning view of a yellow/orange star with a blue
companion, surrounded by a peppering of background stars. A superb
view, recommended.
Additional: Since obtaining
an old 4inch Vixen refractor in mid October, it has been like an itch waiting
to be scratched. Through various reasons, mainly due to poor weather, last
night was the first night I was able to end my torment. I intend
to use this refractor mainly for visual observations of the Moon, planets
and double stars and being f/15 it is well suited for this task.
Until I build a more permanent pier, an EQ5 mount was used and coped surprisingly
very well. Saturn was the first object and I was very pleased with
the resulting image. It took quite a while to learn how to focus
though, with a short pause after each tweak to let the image settle.
Eventually Saturn snapped into perfect focus revealing a beautiful image
at X167. The pale buttery yellow globe floating in the centre of its ring
system always conveys the immensity of space and I was transfixed at the
beauty. The first double for this telescope was one of my favourites,
Polaris. Even though the conditions were against me, a strong cold
breeze was causing some unsteadiness of the image, a pale yellow coloured
Polaris was as good as ever with the faint palest blue companion plainly
in view. Conditions were deteriorating quickly but
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| Mary Flanagan | ||||
| Star:
15
Persei (eta Persei)
Date & Time: Dec. 11 2002 6:00-7:30 PM CST Seeing: 6 <1-10 Seeing Scale (10 best)> Transparency: 6 <1-10 Seeing Scale (10 best)> Location: Apple Valley MN, USA Site classification: Apple Valley MN, USA Temperature: 37°F (~3°C). Sky darkness: 3 <Limiting magnitude> Telescope: 12.5" f/5 Starmaster EL Dob Eyepieces: TV Plossls: 32mm, 15mm Magnification: 106x |
Beautiful blazing
orange primary and a smaller deep blue secondary. I didn't realize until
I came in to check my notes that my frozen brain failed to register that
there is a C component. I'll have to revisit this one.
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| William Guyot/Rene Pinlet | ||||
| Star:
15
Persei (eta Persei)
Date & Time: 12/12/2002. 23h => 1 am Seeing: 5 to 7 <1-10 Seeing Scale (10 best)> Transparency: <1-10 Seeing Scale (10 best)> Location: La Garandie, 25 km to the west of Clermont-Ferrand, France Site classification: Rural Temperature: below 0°C Conditions: Wind none to strong Sky darkness: 5.5 <Limiting magnitude> Telescope: Vixen 80ED, Takahashi Mewlon 210 Eyepieces: clavés 25 and 12mm Magnification: 29x, 60x, 97x |
Easy to find,
not so easy to split the third star.
X29 -> the first one is golden
yellow and the second is close to
X60 ->no other star. I have
mistaken the star with TYC3704-666-1 but
X97 (with mewlon) -> the
third star is unveiled and we can find it
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| John Ryan | ||||
| Star:
15
Persei (eta Persei)
Date & Time: 15 Dec. 02, 20:30 UT Seeing: 4 <1-10 Seeing Scale (10 best)> Transparency: 7 <1-10 Seeing Scale (10 best)> Location: Barraras, Spain Site classification: rural Sky darkness: 3 <Limiting magnitude> Telescope: 9.25" SCT with CCD MX7-16 Eyepieces: CCD Magnification: --- |
This
was the first time I made a CCD image of such a bright primary. I had to
keep taking images until I got below the saturation of the primary which
finally resulted in a image of 1 1/2 secs. I was able to measure the AB
but not AC. I was really trying out the new obsevatory and the CCD image
was secondary which will change.
Results, Eta AB PA = 300.3º Sep. = 28.42" |
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| Luis Balanzino | ||||
| Star:
15
Persei (eta Persei)
Date & Time: Mon Dec 23, 2002, 18h to 20h UT Seeing: 5 <1-10 Seeing Scale (10 best)> Transparency: 5 <1-10 Seeing Scale (10 best)> Location: Göteborg, Sweden 57°43' N, 11°58' E Site classification: Suburban area with moderate light pollution Sky darkness: 4-5 <Limiting magnitude> Moon: Age 19,4 days in Leo Temperature: -5º C Telescope: Russian TAL-1 equatorial reflector 110mm f/7.3 Eyepieces: 25mm and 10mm TAL Super Plossl, 15mm TAL Kellner, 2x TAL Barlow Magnification: 32x, 54x, 80x, 108x |
I
noticed this pair some time ago, because the nice color contrasts:
the primary is orange, the secondary deep blue for me. Although the split is easy at 32 xs, I detected better the colors at 54x and 80x. During moments I believed I saw the C component at the distance and PA indicated, but I'm not sure. |
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