| Paolo Morini | ||||
| Star:
Struve 609
Date & Time: 17 nov 1998, approx 22 UTC Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: San Romualdo, a little village in the country near Ravenna – Italy. Site classification: Suburban Sky darkness: 4.5 <Limiting magnitude> Telescope: Takahashi FS102 Magnification: 164x (LE5 Tak eyepiece) |
Clearly split – faint – a little jewel in the dark of the sky. I think colors are white, but too faint to perceive colors. | |||
| Chuck Layton | ||||
| Star:
Struve 609
Date & Time: Dec. 23, 1998, 08:30 UT Seeing: 2 <1-10 Seeing Scale (10 best)> Location of site: Tacoma (WA) Site classification: --- Sky darkness: 3.6 <Limiting magnitude> Telescope: 20cm f/6 Eq. Newtonian Magnification: 177x |
Observed Colorations of Components: Both the primary and comes are white. Other comments: Very close and hard to separate due to the haze layer and fog. | |||
| Dave Mitsky | ||||
| Star:
Struve 609
Date & Time: 1/19/99 03:20 UT Seeing: 6 <1-10 Seeing Scale (10 best)>. Transparency: ~ 4 Location of site: ASH Naylor Observatory (http://www.msd.org/obs.htm) near Lewisberry, PA Site classification: Rural Sky darkness: ~ 5.0 <Limiting magnitude> Telescope: 17” f/15 classical Cassegrain Magnification: 118x, 202x, 249x |
A close (2.4") pair of 8.5 magnitude F8 stars that were split marginally at 118x. The best view of this colorless binary was at 249x. | |||
| Ilario Melandri | ||||
| Star:
Struve 609
Date & Time: 13/Dec/1999 – 19.16 UTC Seeing: 3 <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: 5.5 <Limiting magnitude> Temperature: +2C Telescope: 150 mm f/15 achromatic refractor Magnification: 140 x (eyepiece Plossl Clavé 16 mm) |
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| William L. Schart | ||||
| Star:
Struve 609
Date & Time: 12/26/99 9:53 pm CST Seeing: 7 <1-10 Seeing Scale (10 best)> Location of site: Killeen, TX (Lat 31 N, Elev 600 ft) Site classification: Suburban Sky darkness: 4.5 <Limiting magnitude> Telescope: Orion 6" Dob. Magnification: 32x, 48x, 72x, 98x, 144x Star: Struve 609
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Easily split
at 32x. Both stars are close in magnitude and appeared to be a nice blue.
Separation 18", PA 272 degrees.
Questions were raised about
my observation of this pair on 12/26/99. I went back and this time I feel
that I have observed the correct pair. Not split at lower powers, at 72x
I began to suspect elongation, at 120x suspected splitting (but maybe this
was wishful thinking). I broke out the barlow and barely split it at 144x,
and definately split it at 240x.
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| Randall Heckman | ||||
| Star:
Struve 609
Date & Time: 12/26/99 at 2:25 UT Seeing: 4 Location of Site: Heckman Observatory 40 37' 10" N and 99 03' 50" W Site Classification: Rural Sky Darkness (Limiting Magnitude): 5 Telescope: 8" Orion Dob Magnification: 120x |
Separation (Clear or Toughing):
Clear
Magnitude Comment: Seemed to be of equal magnitude Color Comment: White or colorless General Comment: Easy to find and split
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| Richard Harshaw | ||||
| Star:
Struve 609 [ADS 3484; HD 30926]
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): Dec 29, 1999 (0200 to 0400 UT) Site classification: suburban Sky conditions: seeing-- began at 8 out of 10, degraded to 6 by 0400 UT transparency-- 8 out of 10 limiting visual magnitude—4.5 Temperature: began at 40F, dropped to 26F by 0400; no wind at first, but a breeze picked up slightly as a front passed by about 0330 UT Telescope: Celestron C-8 Eyepiece: 7.4 mm Plossl (270x) |
Colors of white
(F8) and reddish-orange. It came and went with the deteriorating
seeing-- at times appearing as a "peanut" and at brief moments with a clean
black strip between the two stars.
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| David Bushard | ||||
| Star:
Struve 609
Location of site: River Falls, WI (USA) longitude 92, latitude 45N elevation approx 800 ft (246 m) Date of observations: 29 Dec 1999, 8:00 to 11:00 pm local time (CST) Site classification: rural Sky conditions: Seeing: 6 of 10, improving later transparency: 6 of 10 limiting visual magnitude: 5.2 Temperature: 25 F (-3 C), winds light and variable Telescope: Meade 12" LX-200 EC Eyepiece: Televue 22mm Panoptic (138x), Televue 13mm Nagler (234x) |
Not split at
138x, but "peanut" shape visible. clear split at 234x. no
color apparent.
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| Thad Robosson | ||||
| Star:
Struve 609
Date & Time: 12-30-99, 3:00 to 6:30 UT (12-31-99 UT) Seeing: 4-5 <1-10 Seeing Scale (10 best)> Location of Site: Carbondale, IL, USA Site Classification: Suburban/near rural Sky darkness: 4.7 using "stars counted in the area of" method, (Taurus) <Limiting magnitude> Telescope: 8" f/6 Newt on Dob mount (soon to be split ring :-) Magnification: 60x, 87x
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Notched at
60x, split at 87x
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| Allen Ginzburg | ||||
| Star:
Struve 609
Date & Time: 01/03/2000, 05:14 UTC Seeing: 8 <1-10 Seeing Scale (10 best)> Location of Site: Aptos, CA (USA) Site Classification: Suburban Sky darkness: 4 <Limiting magnitude> Telescope: Meade LX-200 f/10 Magnification: 105x
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Clearly separated,
couldn't tell which was the brighter (primary). One
star had a slight blue tinge, the other slightly yellow.
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| Jay Zimmerman | ||||
| Star:
Struve 609
Date & Time: 0440, 01/14/00 UT Seeing: 7 - 8 <1-10 Seeing Scale (10 best)> Location of Site: Carbondale, IL, USA Site Classification: Suburban/near rural Sky darkness: ~4.2 <Limiting magnitude> Temperature: 22°F (-5.56°C) Telescope: 97mm, f7 apo Magnification: 107x, 160x
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Remarks: Clean
split at 107x; better view at 160x. Colors: A = B = white to slightly
yellow. Estimated PA = 80° (actual = 72°).
A tiny, dim, "headlight"
double (similar to STF 589 but dimmer). This one was a bit of trouble but
worth the effort.
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| Philippe de Jocas | ||||
| Star:
Struve
609
Date & Time: January 22, 1h00-7h300 UT Seeing: 3-4 <1-10 Seeing Scale (10 best)>. Location of site: Ottawa/Hull, Canada Site classification: Suburban Sky darkness: 4.5 <Limiting magnitude> Temperature: -25C Telescope: 6" f5 newtonian Magnification: 120x |
609 was resoved, but with difficulty and only when the Seeing calmed down a bit, at 120x. | |||
| Jim Brownfield | ||||
| Star:
Struve
609
Date & Time: 26/01/2000, 6:30 p.m.- 11:30 p.m. EST Seeing: 3 – 5 (improving) <1-10 Seeing Scale (10 best)>. Location of site: Huntsburg, Ohio, USA Site classification: Suburban Sky darkness: 6 mag., could see ST 855, going to 5th mag. star Rho <Limiting magnitude> Other observing conditions: 83% humidity, 16 degrees F. with 12" snow on ground going to 84% humidity, 4 degrees F. Telescope: 13.1"/F4.5 Dobsonian, with 5" aperture mask for the brighter pairs Magnification: 75x |
split at 75x close and dim, good pairing for 13" telescope | |||
| John M. Ryan | ||||
| Star:
Struve
609
Date of Observation: 30/01/00 23:10UT Location of Observation: Ciudad Rodrigo, Salamanca, Spain 40º 36' N, 6º 32'W, Elev. 800 Meters Seeing: 7 to 8. Best so far this new year based on the Luis Arguelles method (0 - 10, 10 best) Site classification: Urban Limiting Mag. (naked eye): 5 Instrument: Meade 8"SCT Magnification: 80x,167x |
Separation (Clear or Touching):Clear
Split
Magnitude Comment:Both components about equal in accordance with the data. Color Comment:Both components appeared white General Comment:After Struve 589 this was a closer double to split but I had to go to 167x to be sure about the split. At this magnification the seeing stability could be noted with the double appearing and disappearing. The double would be stable for seconds and then disappear for seconds. Very interesting. |
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| John Clemmer | ||||
| Star:
Struve 609
Date & Time: Feb 27/2000 2000 EST Seeing: 8, quite good <1-10 Seeing Scale (10 best)> Location of site: Priceville, Ontario, Canada W80 41'41" N44 10' 40" Site classification: Rural Sky darkness: 7/10ths lowest vis. magnitude around 6.1 seen in Orion <Limiting magnitude> Telescope: 4.5" f26 Kutter Schiefspiegler Magnification: 108x (26mm eyepiece)
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clean w/ 26mm 108x | |||
| G.E.O.D.A Group | ||||
| Star:
Struve 609
Date & Time: 3-III-2000, 19:00-22:00 Seeing: 7.5 <1-10 Seeing Scale (10 best)> Location of Site: Manises, Valencia, Spain. GPS coordinates: 39º 29' 36" N, 00º 27' 56" W. Site Classification: Urban-Suburban Sky darkness: 4.5 <Limiting magnitude> Telescope: Meade 10" LX-200 SCT Magnification: 200x |
Published measures
are the mean of two observations made from two different observers.
d = 5.5; PA = 65
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