| Craig M. Carver | ||||
| Star:
Struve 712
Date & Time: 11/27/98 0030 LT Seeing: 5 <1-10 Seeing Scale (10 best)> Location of site: Randalman, NC (Lat 36.07, Long 79.79, Elev. 500 ft) Site classification: Rural Sky darkness: 5.1-5.3 <Limiting magnitude> Telescope: 6" Maksutov Magnification: 257x |
An easier split
than Psi. This splits only using a high power and at moments of steady
seeing. The pair appear to be white stars.
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| Chuck Layton | ||||
| Star:
Struve 712
Date of Observation: Jan. 11, 1999 Time of Observation: 0620 UT Seeing (1 - 10, 10 best): 5 Site classification: Suburban Limiting Mag. (naked eye): 4.8 Instrument Used: 20cm f/6 Eq. Newtonian Magnifications Used: 244X |
Observed Colorations of
Components: Primary - yellowish white, the comes - white.
Other comments: Another close pair that was easily separated. Nice magnitude contrast. |
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| Paolo Morini | ||||
| Star:
Struve 712
Date & Time: 15 Jan 1999, 22 UTC Seeing: 8 <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: 5 <Limiting magnitude> Telescope: Takahashi FS102 Magnification: 164x (LE5 Tak eyepiece) |
Fine pair.
White-white coloration observed.
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| Dave Mitsky | ||||
| Star:
Struve 712
Date & Time: 2/4/99 02:25 UT Seeing: 6 <1-10 Seeing Scale (10 best)>. Transparency: ~ 6 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, 324x |
At 202x this binary star
with a northeastern orientation was split with difficulty.
The 7th magnitude primary appeared white and the 9th magnitude comes
bluish. |
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| Ilario Melandri | ||||
| Star:
Struve
712
Date & Time: 4/Jan/2000 – 19.53 UTC Seeing: 9 <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: 4 <Limiting magnitude> Temperature: -1C Telescope: 150 mm f/15 achromatic refractor Magnification: 140 x (eyepiece Plossl Clavé 16 mm) |
 |
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| Richard Harshaw | ||||
| Star:
Struve 712 [ADS 4033; SAO 112765]
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: 10 mm Plossl (200x) |
Colors of White
(B9V) and white or pale red.
The system is about 510 light years away, giving luminosities of 50 and 3 Suns.
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| Randall Heckman | ||||
| Star:
Struve 712
Date & Time: 12/29/99 at 2:15 UT Seeing: 4 Location of Site: Heckman Observatory 40 37' 10" N and 99 03' 50" W Site Classification: Rural Sky Darkness (Limiting Magnitude): 5.5 Telescope: 8" Orion Dob with 6" aperture mask Magnification: 120x |
Separation (Clear or Toughing):
Clear
Magnitude Comment: Secondary quite a bit dimmer agreeing with quoted 2 mags difference. Color Comment: Colorless General Comment: Easy to find right next to Psi.
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| David Bushard | ||||
| Star:
Struve 712
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 9mm Nagler (338x) |
This pair is
about as close as i can resolve tonight with this magnification, at 3.1
secs. A is white. though i saw no apparent color in B, an observing
companion said it appeared reddish to her. My eyes are usually better than
hers, though.
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| Thad Robosson | ||||
| Star:
Struve 712
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: 87x
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Split at 87x.
Comp. appears bluish
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| Allen Ginzburg | ||||
| Star:
Struve 712
Date & Time: 01/03/2000, 06:13 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: 312x
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Easily split
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| Giuseppe Bandini | ||||
| Star:
Struve
712
Date & Time: 5/Jan/2000 - 21.19 UTC Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: Italy, Ravenna, Elevation: 0 m Site classification: urban Sky darkness: --- <Limiting magnitude> Temperature: +1C Telescope: Celestron 8” Magnification: 80 x (eyepiece 25 mm Plossl) |
 |
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| Steve Ott | ||||
| Star:
Struve 712
Location of site: Millersburg, KY Date of observations: Jan 9, 2:30 - 4 UT Site classification: Suburban Sky darness: ~ 5.5 <limiting magnitude> Seeing: 5 (scale 1-10) Telescope: 94 mm f/7 apo refractor Magnification: 220x |
A pleasant
sight after trying 52. Easy, if not bright, at 220X. Primary blue-white,
secondary pale red.
(About 52 Ori, I couldn’t
resolved it at 220X. I noticed that the dot that represents 52 in the `Uranometria
2000` atlas looked a bit big for a star whose components are listed
as 6.1-6.1 (in the recent S&T article). I believe the WDS (Washington
Double Star Catalogue) lists the magnitudes as 5.26 and 5.33 resp)
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| Jay Zimmerman | ||||
| Star:
Struve 712
Date & Time: 0520 01/14/00 Seeing: 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:
Initially split at 160x and subsequently at the lower power of 107x.
Colors: A = white; B = ?. Est. PA = 50° (actual = 62°).
This one was a bit difficult,
probably owing to low magnitude of the B component rather than to separation.
B's magnitude also inhibited good color determination. Given the
conditions (including my eyesight), I feel that at mag. 9 I was working
right at the practical (rather than theoretical) limiting magnitude of
my scope.
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| Bill Becker | ||||
| Star:
Struve 712
Location of site: Casper, Wyoming Elev. 5200' Date of observations: Jan 15th 5:05 UT Site classification: Suburban Seeing: 5 Limiting manitude: 4.5 Telescope: Quantum 4 Maksutov Magnification: 170x |
I split this
one at 170x; I was kind of surprised I did with the sep. listed at 3.1".
Primary seen to be very blue, no color seen in companion
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| Philippe de Jocas | ||||
| Star:
Struve
712
Date & Time: January 22, 1h00-7h300 UT Seeing: 2-3 <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, 260x |
Struve 712 That one made me work, being seen at 120x, but losing the companion at 260x, washed out by the Seeing which by then had degraded somewhat to 2,.. 3/10. | |||
| Jim Brownfield | ||||
| Star:
Struve
712
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: 47x, 75x |
detectable at 47x without mask, clean at 75x with mask | |||
| John M. Ryan | ||||
| Star:
Struve
712
Date of Observation: 30/01/00 21:50UT 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: 167x, 286x |
Separation (Clear or Touching):Clear
split
Magnitude Comment: Noted difference, both dim in accordance with the data. Color Comment: Both components seemed white General Comment:This was a much closer split. Depending on the seeing conditions the double was drifting in an out but could be verified as a split. Another interesting example on how the seeing affects the split. |
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| John Clemmer | ||||
| Star:
Struve
712
Date & Time: Feb 7/200, 2100 EST Seeing: 6, a bit bouncy <1-10 Seeing Scale (10 best)> Location of site: Priceville, Ontario, Canada W80 41'41" N44 10' 40" Site classification: Rural Sky darkness: didn't check lowest vis. magnitude. best would be circa 6.2 <Limiting magnitude> Temperature: -15C Telescope: 4.5" f26 Kutter Schiefspiegler Magnification: 160x, 17mm eyepiece |
160x/clean | |||
| Bill Reinehr | ||||
| Star:
Struve
712
Date & Time: February 14, 2000, Seeing: 8 (very still) <1-10 Seeing Scale (10 best)> Location of site: Pflugerville, Texas, USA (30 degrees N.) Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Temperature: 63 F Telescope: Vixen 80mm Fluorite, f/8 on Custom D altaz mount Magnification: 29x,91x, 183x |
A clean split
at 91x. I was a bit surprised that this one split so easily. Increased
the power to verify the split and it was fine. The secondary is quite faint
but easy to see this evening.
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| G.E.O.D.A Group | ||||
| Star:
Struve 712
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 = 3.3; PA = 67
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