Struve 2333 

Richard Harshaw 
Star: Struve 2333 
Date & Time: 6 July, 2001, 03:00 to 04:55, UT
Seeing: 8 <1-10 Seeing Scale (10 best)>. 
Transparency: 6-7/10 ,variable, due to high hazy clouds 
Location of site: Northern Kansas City, Missouri. 39º 15' N, 94º 30' W, 980 ft above Mean Sea Level
Site classification: Suburban
Sky darkness:  <Limiting magnitude>
Telescope: Celestron C-11
Eyepieces: 25mm Plossl 
Magnification: 112x		 Position:  1831+3215 
Magnitudes:  7.5 (A0), 8.4, 12.5 
Sep/PA's:  AB- 6 = / 334 =   AC- 164 = / 35 = 
Year of this measurement:  1952 
Distance (light years):  1,560? 
Luminosity (in suns):  286? 
Colors noted:  Y, O?, ?? 
Comments:  Easy system, but C is a bit tough. 
Rating:  3 

 

 
William Schart 
Star: Struve 2333
Date & Time: July/9/01 0500 to 0635 UT
Seeing: 7 <1-10 Seeing Scale (10 best)>. 
Location of site: Killeen, TX, USA
Site classification: Suburban
Sky darkness: 4 <Limiting magnitude>
Temperature: In the 80's F (30's C). Slight breeze. 
Telescope: Celestar 8" SCT
Eyepieces:  25mm, 17mm, 10mm
Magnification: 80x, 120x, 200x		 Cleanly split at low power. Both appeared blue.

 

 
John M. Ryan 
Star: Struve 2333
Date & Time: 17 July 2001 ( 22:00 UT)
Seeing: 6+ <1-10 Seeing Scale (10 best)>. 
Location of site: Barreras, Salamanca, Spain.
Site classification: Rural,Suburban.
Conditions: no moon, fairly dry but with gusts of wind.
Sky darkness: 5+, some light due to street lights in the village. <Limiting magnitude> 
Telescope: Meade 7" Mak Cas mounted on a Losmandy GM8. 
Eyepieces: 25mm plossl, 12mm plossl
Magnification: 107X, 223X
Harshaw Scale: 2 <1-5; 1 best>		 Split at 107X with better view at 223X. Primary white with tint of  blue. Secondary Bluish White. The magnitude difference seemed greater than that listed of .60.

 
Luis Argüelles
Star: Struve 2333
Date & Time: 21st, July, 2001. 21:00 – 23:05UT
Seeing: 7-8 <1-10 Seeing Scale (10 best)>
Transparency: 3-4 <0:worst -10:best >
Location of site: Quintueles, Gijón, Spain.  43º 32N, 5º 55W. Altitude: 20 m.
Site classification: Suburban
Sky darkness: 3.0 - 3.5 <Limiting magnitude> 
Temperature: about 15º C
Conditions: A lot of haze and moisture. Seeing is rather good, but haze actuates like a light diffusor and that makes difficult observe stars fainter that 10
magnitude.
Humidity: about 90%
Telescope: Vixen 102 4" achromatic refractor
Eyepieces: 35, 10 and 5mm Baader-Planetarium Eudiascopics
Magnification: 200x
Harschaw Scale: 4 <From 1 to 5. 1 = Great, 5 = poor interest>		 It's clearly split at 200x, noting perfectly the difference of magnitudes. Nevertheless, it's a rather bored double star.

 
Bob Hogeveen 
Star: Struve 2333
Date & Time: 23 July, 2001, 00:00
Seeing: 8 <1-10 Seeing Scale (10 best)>. 
Location of site: Annen, The Netherlands - 53N, 6E
Site classification: Village backyard
Sky darkness: 5 <Limiting magnitude> 
Telescope: Celestron C-11
Eyepieces: Ultima 30mm , TV plossl 20mm, LV 15mm, 7mm 
Magnification: 93x, 140x
Harshaw Scale: 2 <1-5; 1 best>		 This double gave me a bit of trouble concerning the colors. The best view was with 140x where the separation is wide and the stars are bright. First view with 93x made me think that A was white and B bluish. Wiyh 140x I started to doubt whether this was true. One moment I saw A yellowish and B white, another moment I saw A white and B bluish, and in between was also possible...

So there was a color difference, that was obvious, but I couldn't find the right balance.

 
Jim Jones
Star: Struve 2333
Date & Time: 
Seeing: 6 <1-10 Seeing Scale (10 best)>. 
Location of site: Lake Oswego, Oregon 
Site classification: Suburban
Sky darkness: 4.5 <Limiting magnitude>
Sky: New moon + 2 days
Telescope: 8 inch LX50 SCT 
Eyepieces:  18mm Radian
Magnification: 112x
 
 

Star: Struve 2333
Date & Time: 2nd, August, 2001
Seeing: -- <1-10 Seeing Scale (10 best)>. 
Location of site: Lake Oswego, Oregon 
Site classification: Suburban
Sky darkness: --- <Limiting magnitude>
Telescope: 8 inch LX50 SCT 
Eyepieces:  Connectix B&W Web Cam. 
Magnification: --

 Primary.....blue-white
Companion....yellow

A fairly bright double set in a very dim field, surrounded by a ragged circle of mag 9 and 10 stars
 
 
 
 
 
 
 
 
 
 
 
 

Much to my surprise I got a very usable image.
I took 10 images (3 second esposures) and some dark frames and on to STF 2474.  Again a pretty good image.  Another 10 images and 10 dark frames.  This time I couldn't get both 2474 and 2470 on the chip at the same time.  But what the heck, I was able to image a couple of 8th mag stars with a web cam.

Bottom line....after analyzing the images with the distance tool in AIP4WIN
I measured STF 2333 with a separation of 6.28" and a standard deviation of 
0.29".

This compares favorably to a published separation of 6.3".


 

 
Philippe Dejocas
Star: Struve 2333
Date & Time: July 28 2001
Seeing: 6.5 <1-10 Seeing Scale (10 best)>
Location of site: Canada
Site classification: Suburban
Conditions: Clean skies and warm temperatures.
Sky darkness: 4.5 <Limiting magnitude> 
Telescope: 6inch/f5 newt
Magnification: 40x, 85x

 

 Resolved, with some diff., at 40x. Better seen at 85x. I was struck by the relative sparseness of the field, though I also noted that 85x brought out many fainter stars. I could not catch a hint of the 12.5 star. My visual estimate was of ~ 7" - NNW/NWN (WDS: 6.6"- 333°; 1997). A **½ in my book.

 
 
 

 

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