| Paolo Morini | ||||
| Star:
23 Orionis
Date & Time: 19 nov 1998, 23:00 UTC Seeing: 2 (cloud passing by) <1-10 Seeing Scale (10 best)> Location of site: Ravenna – Italy. Site classification: Urban Sky darkness: 3.5 <Limiting magnitude> Telescope: Televue Pronto Magnification: 120x (LV4 eyepiece) |
The second
observing session about this program took place from my home in Ravenna
– Italy. The scope, a TeleVue Pronto, was fitted on an altazimut
mount, using as finder a riflescope 6x40 mm. About 23 Orionis, this was
very easy to locate and split – the faint component was very faint because
of the foggy sky. Main component yellowish, faint
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| Craig M. Carver | ||||
| Star:
23 Ori
Date & Time: 11/22/98 05:50 UT Seeing: 5 <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: 4.3-4.5 <Limiting magnitude> Telescope: 6" Maksutov Magnification: 95x |
An easy double with a bright white primary and pale blue companion at 95x. | |||
| William L. Schart | ||||
| Star:
23 Orionis
Date & Time: November, 23th, 1998 - 9:45 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: 48x, 120x Star: 23 Orionis
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Located by
star-hopping from gamma Ori. The primary was yellow, the secondary was
blue. Easily split at this power.
This, psi, and Struve 712
all just barely fit into the FOV in the low power EP.
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| Chuck Layton | ||||
| Star:
23 Orionis
Date & Time: Dec.20, 1998, 06:50 UT Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: Tacoma (WA) Site classification: --- Sky darkness: 4.4 <Limiting magnitude> Telescope: 20cm f/6 Eq. Newtonian Magnification: 76x |
Observed Colorations of
Components: The primary is very yellow, the comes is pale white with
slight greenish tinge.
Other comments: An easy double with a pretty color contrast. |
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| Dave Mitsky | ||||
| Star:
23 Orionis
Date & Time: 1/8/99 02:41 UT Seeing: 4 <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 |
23 Orionis is a widely separated pair (32.1") with magnitudes of 5.0 and 7.1 and a position angle of 28 degrees. There was a slight color difference between the two stars, one being spectral class A and the other B1. The primary appeared white and the comes as a grey blue. 23 Orionis was split by the 5" f/5 finderscope at approximately 18x and was attractive at both 118 and 202x through the 17". | |||
| Orlon Peterson, Marilyn Head, Giles Reid and David Downing | ||||
| Star:
23 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: 50x |
At 50x this was a "nice double". Well separated in the eyepiece. | |||
| Ilario Melandri | ||||
| Star:
23
Orionis
Date & Time: 13/Dec/1999 – 19.30 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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| Randall Heckman | ||||
| Star:
23 Orionis
Date & Time: 12/27/99 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 Magnification: 46x |
Separation (Clear or Toughing):
Clear
Magnitude Comment: Secondary substantially dimmer than primary in agreement with the published 2 magnitudes difference. Color Comment: Yellow - orange and blue General Comment: Beautiful color contrast. One of my favorite doubles on this list of 33.
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| Richard Harshaw | ||||
| Star:
23 Orionis [STF 696; ADS 3962; SAO 112697]
ADS 3823; SAO 131907] 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: Celestron Micro-Guide (160x), 2.48x Barlow (400x effective magnification) |
I made five
readings with the Micro-Guide and got an average of 32" in PA 25 (compared
to the 1934 measures of 32" at 28).
I noted colors of yellowish-white (B1V) and bluish-white (B5V). This is really a beautiful pair! The pair is thought to be about 960 light years away, which would imply luminosities of about 740 and 110 Suns. The pair is a member of the Orion OB1 Association.
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| David Bushard | ||||
| Star:
23 Orionis
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) |
Fairly wide
pair at 32 secs. A is brilliant white, B is bluish.
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| Tomás Vazquez | ||||
| Star:
23 Orionis
Date & Time: 3/1/2000, 19:43:16 TU Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: 37 24 N. 5 58 W. Sevilla, Spain Site classification: Urban Sky darkness: 3 <Limiting magnitude> Telescope: Celestron C8” D:203mm. f/6,3 Magnification: CCD Camera
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Observation method: CCD
Camera.
Integration time: 5 seconds Reading CCD software: LUCAS 1.1 Treatment software: LAIA 3.1g Image Position: North up, East left. This double star is from the “easy” set. In the image you can see the main 5 magnitude component and the 7.1 magnitude secondary, being located at a distance of 32” with a PA of 28 degrees. Both components are blue.
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| Allen Ginzburg | ||||
| Star:
23 Orionis
Date & Time: 01/03/2000 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: 208x
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This one was
easily visible and measured the spacing at about 30"
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| Giuseppe Bandini | ||||
| Star:
23
Orionis
Date & Time: 5/Jan/2000 - 20.54 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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| Richard Bise | ||||
| Star:23
Orionis
Date & Time: January/7,8/2000 Seeing: 5 <1-10 Seeing Scale (10 best)> Location of site: 20 NW of Tucson Az 32.884N -110.979W Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Telescope: 10 inch Meade Dobsonian Magnification: 49x (25mm Meade Plössls) |
At 49X, very nice colors,
i saw pearl and pale blue!
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| Jay Zimmerman | ||||
| Star:
23 Orionis
Date & Time: 0500 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: 13x, 53x
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Split at 13x
with 48 mm eyepiece. Colors (determined at 53x): A = ylsh white;
B = pale blue. Est. PA = 30° (actual = 28°). A pretty, wide
double and a relief after spending an hour trying to locate 8th and 9th
mag. "pinpoints"
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| Bill Becker | ||||
| Star:
23 Orionis
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: 85x Star: 23 Orionis
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Easy to find
and split. With an 18mm radian at 85x the primary appeared white and the
companion seemed a definite blue
I found this double to the NW of Psi. An easy split with the primary seen as white and the secondary appearing blue. My visual estimate of pa was 30* while the data showed 28*, not too shabby a guess. Of course, when I finally learn how to measure pas for myself, I'll be able to provide more useful info. |
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| Philippe de Jocas | ||||
| Star:
23
Orionis
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: 40x |
23 Ori Daffodil yellow and blue, very nice at 40x. | |||
| Jim Brownfield | ||||
| Star:
23
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: 47x Star: 23 Orionis
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split at 47x, white primary
& bright blue secondary
Split at 28x. |
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| John M. Ryan | ||||
| Star:
23
Orionis
Date of Observation: 30/01/00 21:40UT 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:Difference in magnitudes in accordance with the data. Color Comment:Brighter component whitish blue, Dimmer component tends to yellowish General Comment:Wide easy split at both magnifications |
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| Jordi Viver | ||||
| Star:
23 Orionis
Date & Time: 5/02/2000, 24:00 UT Seeing: 6 <1-10 Seeing Scale (10 best)> Location of Site: Vic (Spain) 41º55’N, 2º19’E Elev. 570m Site Classification: Suburban Sky darkness: 4.62 <Limiting magnitude> Temperature: 1ºC Telescope: 200mm self-made Newton, Dobsonian Magnification: 48x |
Separation:
Clear separation.
Catalog data: Guide 7.0: vM 4.98, 7.11 D32”, PA29.2º. WDS(1973): vM 5.0, 7.19, D31.9”, PA29º. General coments: White color.
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| John Clemmer | ||||
| Star:
23
Orionis
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 |
160x/clean | |||
| Bill Reinehr | ||||
| Star:
23
Orionis
Date & Time: February 16, 2000 4:30 UTC Seeing: 6 + variable <1-10 Seeing Scale (10 best)> Location of site: Pflugerville, Texas, USA (30 degrees N.) Site classification: Suburban Sky darkness: 4 <Limiting magnitude> Temperature: 64 F Telescope: Vixen 80mm Fluorite, f/8 on Custom D altaz mount Magnification: 29x |
A clean split
at 29x. No colors detected.
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| Mark Brickley | ||||
| Star:
23
Orionis
Date & Time: 18th february 2000 19:00-19:25 UT Seeing: 6 but with intermitttent cloud <1-10 Seeing Scale (10 best)> Location of site: Somerset, Uk Site classification: Suburban with significant local light pollution and with almost full moon Sky darkness: 3 <Limiting magnitude> Telescope: Televue TV85 Magnification: 47x, 90x (13mm Nagler and 7mm Nagler) |
Well resolved
at both 47* and 90*. Stars appear approx. same magnitude with little
coloration or colour difference to my eyes.
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| Tom Teague | ||||
| Star:
23
Orionis
Date & Time: 2000 February 19, (2140 UT) Seeing: 7 <1-10 Seeing Scale (10 best)>. Location of site: Chester, England (53 11 08N; 02 51 39W) Site classification: Suburban Sky darkness: 3 (Moon just past full) <Limiting magnitude> Telescope: 63mm Zeiss Telementor refractor Magnification: x56, x112, x210 |
A fine wide pair, splendid
at all powers, but perhaps slightly better at x112 and x210. Yellow
and blue. Estimated PA = 30.
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| Tollefsen Magne | ||||
| Star:
23
Orionis
Date & Time: February 24, 2000 at 20.30 UT Seeing: 7 <1-10 Seeing Scale (10 best)> Location of site: Skien, South-East of Norway Site classification: Suburban Sky darkness: 4.6 <Limiting magnitude> Telescope: Vixen 120mm 4 elements refractor Magnification: 353X (Celestron Microguide eyepiece, and a TeleVue 5X powermate) |
Separation
32,0 arcsec. Position Angle 28 degrees.
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| G.E.O.D.A Group | ||||
| Star:
23 Orionis
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 = 38.3; PA = 26
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