| Craig M. Carver | ||||
| Star:
52 Orionis
Date & Time: 11/24/98 0700 UT Seeing: 6-7 <1-10 Seeing Scale (10 best)> Location of site: Madison, WI (Lat 43.07, Long 89.38, Elev. 500 ft) Site classification: Suburban Sky darkness: 4.8-5.0 <Limiting magnitude> Telescope: 6" Maksutov Magnification: 95x, 190x, 257x |
This is a difficult split for my 6" at this site. The difference in magnitudes of the pair (6.0 and 9.5) also make it difficult. I could see an elongation or bulge where the secondary would be at 257x, but no split or darkness between them. | |||
| Paolo Morini | ||||
| Star:
52 Orionis
Date & Time: 07 Dec 1998, approx 23 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 eyepiece) – 205x (LV4 eyepiece) – 328 x (LV 2.5 eyepiece) |
At 328x the star is split
and the separation correspond to the limit of the instrument. At lesser
magnification the duplicity is not visible.
Honestly I didn’t see clearly a back space between the stars, but the elongated shape (two disks touching each other) was very evident. My friend saw the black channel clearly, I was not so sure (the image is dark at this magnification and there were cars passing on the near road with strong disturbing lights). I’ll try again to split better this star.
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| Dominik Elsässer | ||||
| Star:
52 Orionis
Date, Time: 28 Dec 1998, 00:17-01:08 UT Limiting Magnitude (NE): ~4.5 (moonlight!) Seeing: 8-9; improving [1-10] Location: Kleinkahl, Germany Site classification: Rural Telescope: Vixen 102M Refractor Magnification: 250x (Celestron Ortho) Star: 52 Orionis
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Comments: Star
appears clearly elongated with two centers during most of the observation
period. In moments of really steady seeing the pair apparently begins to
split! Under perfect conditions I suppose this star can be split completely
with this telescope.
I finally saw two round Airy-Disks
with the smallest possible amount of black space between them; the colour
of the stars was a slight yellow. This seems to be the resolution-limit
of the Vixen 102M.
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| William L. Schart | ||||
| Star:
52 Orionis
Date & Time: 1/6/99 8:55 pm CST Seeing: 8 <1-10 Seeing Scale (10 best)> Location of site: Killeen, TX (Lat 31 N, Elev 600 ft) Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Telescope: Orion 6" Dob. Magnification: 98x Star: 52 Orionis
Star: 52 Orionis
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Located by
star hopping from Alpha Ori. Easily identified as it the brightest star
in the neighborhood. However I was unable to split at any power currently
available to me. I will try again later when the barlow I have on order
arrives.
Continuing observations for
the 33 doubles in Orion project, I re-visited this star to see if I could
split it with the aid of my newly arrived barlow. I did possibly detect
a very extremely faint companion at aproximately PA 180. It was too faint
for any kind of measurement.
I was able to split this
at 120x, not at all at lower powers. The secondary is extremely faint,
at the limits of my visibility. I estimate the separation at about 1",
I suspected at least elongation at 144x and confirmed split at 240x. Both appeared W and a rough estimate of the PA is 60°.
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| Chuck Layton | ||||
| Star:
52 Orionis
Date of Observation: Jan. 11, 1999 Time of Observation: 06:45 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: 271X |
Observed Colorations of
Components: Both components appear yellowish white.
Other comments: Very close pair of identical yellowish stars. Beautiful. Clean split. |
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| Dave Mitsky | ||||
| Star:
52 Orionis
Date & Time: 1/27/99 06:12 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> moonlight Telescope: 17" f/15 classical Cassegrain Magnification: 118x, 202x, 259x |
This close (1.2") binary
was occasionally split with difficulty at 202x and was a close split at
259x. No obvious color was noted.
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| Orlon Petterson, Marilyn Head, Giles Reid and David Downing | ||||
| Star:
52 Orionis
Date & Time: 13/02/99, 10:00UT to 14:00 UT Seeing: 7-8 got better as night progressed Location: Staveley, ~80km SW of Christchurch, New Zealand. Instrument: 102mm f/9.8 refractor Sky darkness: 6 - 6.5 <Limiting magnitude> Again didn't actually make a definitive measure but the sky was dark and the transparency really good. Magnification: 208x |
This was the last one I
tried for. Took a while to locate it with positive identification
taking a while, unfortunately after all that effort and Orion low in the
sky it appeared annoyingly to be just a point source all alone in the night.
I'll be back to check this one out again!
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| Ilario Melandri | ||||
| Star:
52
Orionis
Date & Time: 6/Dec/1999 – 19.16 UTC Seeing: 5 <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: -0.5C Telescope: 150 mm f/15 achromatic refractor Magnification: 250x (Othoscopic eyepiece 9 mm) |
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| Richard Harshaw | ||||
| Star:
52 Orionis [STF 795; ADS 4390; SAO 113150]
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): 0455 on 12/31/99 Site classification: suburban Sky conditions: seeing-- 6 out of 10 transparency-- 8 out of 10 limiting visual magnitude-- 5 Temperature: 36 F Telescope: Celestron C-8 Eyepiece: 7.4mm w/ 2.48x Barlow (670x) |
This pair is
too close to measure with my illuminated reticule Micro-Guide so I can
only report visual impressions.
I suspected duplicity at
200x, but easily split the pair at 670x. I found that an objective diffraction
mask helped a great deal as it broke up the two stars's Airy disks into
6-spoked patterns, and by
This is a beautiful pair, consisting of two even lily-white specks with the crispest isthmus of black sky between them! Hipparcos data suggests a
distance of 480 light years, implying a total luminosity of 132 Suns.
Measurements from 1990:
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| Thad Robosson | ||||
| Star:
52 Orionis
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, 174x
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87x was elongated,
but not notched. 174x showed definite sep.
both pure white.
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| Randall Heckman | ||||
| Star:
52 Orionis
Date & Time: 12/31/99 AT 2:10 UT Seeing: 5 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 8" with 6" aperture mask Magnification: 160x |
Separation (Clear or Toughing):
Touching
Magnitude Comment: Equal magnitude Color Comment: White General Comment: Occassionally the pair would split, but most of the time the pair formed a touching figure eight.
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| Jose Fernandez | ||||
| Star:
52
Orionis
Date & Time: 11 Jan 2000, 21h30m UT Seeing: 6 <1-10 Seeing Scale (10 best)> Location of site: Asturias-Spain. Lat:43º16'N, Lon:6º1'W Elevation: 800 m (2424 feet) Site classification: Rural Sky darkness: 5.5 <Limiting magnitude> Telescope: Intes 6" MK65 f12 Magnification: 240X (Celestron Ultima 7.5 mm), 281X (Meade 6.4 mm), 360X (Celestron Ultima 5 mm) |
At 240X the star is slightly
elongated
At 281X the star is elongated and in moments of good seeing I can see two round Airy disks At 360X the pair is clean split. No obvious color noted in the stars
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| Jim Brownfield | ||||
| Star:
52
Orionis
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: 140x, 200x |
split at 140x with mask, 200x for clearer separation | |||
| Tom Teague | ||||
| Star:
52
Orionis
Date & Time: 2000 January 25-26, 2145UT Seeing: 7 <1-10 Seeing Scale (10 best)>. Location of site: Chester, England (53 11 08N; 02 51 39W) Site classification: Suburban Sky darkness: 4.5 <Limiting magnitude> Telescope: 63mm Zeiss Telementor refractor Magnification: x140, x252 |
x140, single but poorly defined - suspect elongation SSW/NNE? x252, definitely very slightly elongated/elliptical in estimated PA 200 degrees. No colours. | |||
| John M. Ryan | ||||
| Star:
52
Orionis
Date of Observation: 30/01/00 22:00UT 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):Touching
Magnitude Comment:Both about equal and mag. 6 in accordance with the data. Color Comment:Both components appeared whithe. General Comment:This was the hard nut of the night. At both 167X and 286X I was going from a single star to a figure eight (peanut shape). At times I thought I had the split but could not be sure. Have to leave this one doubtful and will have to return to it and use the Barlow. |
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| Orlon Petterson | ||||
| Star:
52
Orionis
Date & Time: 22 February, 2000, 10:00-10:45 UTC Seeing: 8-9 <1-10 Seeing Scale (10 best)> Location of site: Christchurch, New Zealand 43 deg S Site classification: Suburban Sky darkness: 5 Mag, with a gibbous moon to the east <Limiting magnitude> Telescope: C102 f/10 refractor Magnification: 208x |
Appears split
only at high power of 208x, mostly appears peanut shaped given the seeing
not that steady as cloud coming in from the NE, but occasionally splits
clearly into 2.
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| Jay Zimmerman | ||||
| Star:
52 Orionis
Date & Time: 03/06/00, 0400 UT Seeing: 6 <1-10 Seeing Scale (10 best)> Location of Site: Carbondale, IL, USA Site classification: Suburban/ near rural Temperature: 37°F (2.8°C) Sky darkness: 5.9 <Limiting magnitude>t Telescope: 94mm, f7 apo Magnification: 160x, 192x, 256x, 384x |
52 Ori was
elongate at 160x, and elongate-to-notched at 192x and 256x. The components
were distinct disks, touching but never cleanly separated, at 384x. Colors:
A = B = white. The sky tonight was highly transparent and generally too
turbulent to work efficiently at high powers.
Star images were agitated
and smeared except for very brief periods of calm. I made the observations
of 52 during very brief moments of steady sky. If the separation of 52
Ori is really 1.2 arc seconds, as advertised, it is almost exactly at the
Dawes Limit of my optics. I have the distinct impression that under better
conditions (seeing 8 or 9) my glassware might be able to cleanly split
52. Dream on.
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| G.E.O.D.A Group | ||||
| Star:
52 Orionis
Date & Time: 11-III-2000, 18.30-21.30 UT Seeing: 7 <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: 3 <Limiting magnitude> Telescope: Meade 10" LX-200 SCT Magnification: 200x |
Published measures
are the mean of two observations made from two different observers.
d = 2.2; PA = 223
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| Bill Reinehr | ||||
| Star:
52
Orionis
Date & Time: July 20, 2000 04:30 UTC Seeing: 7+ <1-10 Seeing Scale (10 best)> Location of site: Pflugerville, Texas, USA (30 degrees N.) Site classification: Suburban Sky darkness: 4.0 <Limiting magnitude> Temperature: 79 F. Telescope: Vixen 80mm Fluorite, f/8 on Custom D altaz mount Magnification: 71x (9mm Vixen Lan) |
Very cleanly
split but the companion was quite faint.
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| William L. Schart | ||||
| Star:
52
Orionis
Date & Time: Seeing: 6 <1-10 Seeing Scale (10 best)> Location of site: Killeen, TX (Lat 31 N, Elev 600 ft) Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Telescope: Celestar 8” SCT Magnification: 78x, 120x, 203x |
This one I
got as slightly elongated. A yellow color for the pair as a whole.
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| Otto Piechowski | ||||
| Star:
52
Orionis
Date & Time: Sunday, February 25, 2001 8 to 10 pm EST Seeing: 7 <1-10 Seeing Scale (10 best)> Location of site: Lexington, Kentucky, USA Site classification: Suburban Sky darkness: <Limiting magnitude> Conditions: Clear, deep sky, still, fairly steady sky Telescope: 150 mm mak-cass Magnification: 257X, 360X (7 and 5 mm orthoscopic eyepieces) |
Clearly resolved.
The faintness of the stars (both 6 magnitude) somehow made this system
seem smaller and farther away then all the others I looked at.
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