Struve 3050 

Tom Teague
Star: Struve 3050 
Date & Time: 2000 October 19 (2025 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: 4.5 <Limiting magnitude> 
Telescope: 63mm Zeiss Telementor refractor 
Magnification: x140, x210 
 
 
Both stars white.  To my eye, the s component is clearly fainter.  I cleanly separated the pair x140, with a definite dark thread between the two stars.  Got a superb view x210 - two perfect round discs, not quite in contact but separated by a distinct thread of darkness.  This pair would make a fine test object for a 6cm OG, although it is not really very difficult for the Telementor.  PA estimated at 300. 
 
 
 
 
 
Thad Robosson
Star: Struve 3050 
Date & Time: 21, October, 2000 
Seeing: 7-8 <1-10 Seeing Scale (10 best)>. 
Location of site: Phoenix, USA 
Site classification: Decidedly Urban 
Sky darkness: 4 <Limiting magnitude> 
Temperature: about 70ºF 
Telescope 90mm ETX MakCas 
Magnification: 85x 
  
 
Not too hard to find, but one heck of a star hop.  It is one of the brighter stars in this field.  39x  I suspect elong, but not "8" Color appears white/grey.  83x definately split w/ dark between.  Est PA about 315°.  125x, Even more defined double, but no color noted.  A very equal pair. 
 

 

 
 
Richard Harshaw
Star: Struve 3050 (ADS 17149) 
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): Nov 2, 2000 at 2330 
Site classification: suburban 
Sky conditions
seeing--  8 out of 10 (at times, approaching 9) 
transparency-- 7 out of 10 (high, thin and spotty clouds, taking perhaps 1magnitude from the starlight) 
limiting visual magnitude-- 4.0 mag 
Telescope: Celestron C-8 
Eyepiece: 7.4mm, 280x 
 
 
Year of first measurement:  AB 1830, 4.0 / 189 (quadrant reversal???); AC 1909, 82 / 289 
Year of last measurement:  1999 
Distance (light years):  n/a 
Luminosity (in suns):  n/a 
Eyepiece and magnification:  7.4mm, 280 x 
Colors noted:  W, W and W??.  Webb:  yW, ?.  C was extremely difficult. 
The orbital period is 355 years (Heintz, 1974). 
Very nice pair, earning a "1". 
 
 
 
Tim Leese
Star: Struve 3050 (ADS 17149) 
Date & Time: 2nd December 2000 (21:30 UT) 
Seeing: 6 <1-10 Seeing Scale (10 best)>  
Location of site: Cheshire. UK 
53° 15' N –2º 33' W  
Site classification: Suburban  
Sky darkness: 3 <Limiting magnitude>  
Telescope: 200mm f/6  Newtonian scope  mounted over a Vixen GP mount (manual slow motion). 
Magnification: X60, X120, X240  

 

At X60 magnification some elongation and maybe a peanut shaped white star was observed. 
Separation of the two white stars, in moments of steady seeing, was achieved using a magnification of X120. The best view came from using X240 magnification giving a classic view of two close equal magnitude white stars. 
 
The PA was estimated using X240 and found to be 310deg. 

 

 
 
William L. Schart
Star: Struve 3050 (ADS 17149) 
Date & Time: 11/27/00 Time: 7:30 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 <Limiting magnitude> 
Instrument: Orion 6” Dob 
Magnification: 32x, 120x, 144x, 240x 
 
The vertex of a flat triangular asterism located on the other side of alpha from Struve 24. This was one of our Olympic stars, but I revisited it to make this a “legal” observation for the Andromeda project. (Is that like The Andromeda Strain ?) 
 
Unable to split except at higher powers - suspected at 120, but not confirmed until I broke out the “big gun” (barlow), and even then not a real clean split. Color Y (nice golden yellow). No attempt was made to measure or even estimate for this pair. 
 
Monday was a beautiful day - sunny and warm, with a high of 72° F (22° C) and still quite balmy when I went out to observe. My first stop was Struve 3050, reported below. Then I tried for 26 and Struve 514, without success. I sort of think that I found them, but since I couldn’t split them, I cannot be sure. The separations listed in out table I should have been able to split, possibly the maag 9 and 10 companions were too faint for the prevailiing conditions. Or I amy have been looking at the wrong stars. I think that it is time to prepare more detailed finder charts to track down other pairs that I either have not had any success using Norton’s or do not appear in that reference. However, while I was searching, I did observe a meteor flash through the FOV. Serrendipity! 
 
 
 
Bob Hogeveen
Star: Struve 3050 (ADS 17149) 
Date & Time: December 30, 2000  21.00->23.30 UTC+1  
Seeing: -- <1-10 Seeing Scale (10 best)>. 
Location of site: Annen, The Netherlands (53 N, 6 E) 
Site classification: Village-backyard  
Sky darkness: 4.5 <Limiting magnitude> 
Conditions: Now and then some clouds
Temperature: -2ºC
Telescope: Meade LX10 (8" SCT)
Eyepieces: TV 40mm, Meade 25mm, TV 20mm, Vixen LV 7mm
 
A wonderful double, both stars yellow and very close to each other!
With 100x they are separated but very, very close. At 285x they are cleanly split but the star-images are fuzzy.
Rating : 2
 
Just for the fun of it I tried STF3056, a very close one which is situated near STF3050. No more than some elongation could be noted at 285x, but the elongation was true, I checked the orientation afterwards (always afterwards!)
Rating : 5
 
For my observing companion (see navidad-picture) it was a strange evening. Tonight I couldn't let her out because of the firecrackers going off now and then. She hates that sound and starts barking very loud every time a firecracker goes off. Normally she lies down somewhere near where I am observing and every time I go inside to have a look at the PC for the next object she follows me in, and out again. This time I didn't let her out and she lay down in front of the gardendoor wondering why she wasn't allowed to come out with me.

I had a nice time with my "old" LX10. I didn't get the CG-11 out because I didn't expect much of it. But the cloudgods were nice to me and I had almost uninterrupted observation for about 2.5 hours. I ended the session with Theta Ori at the time when the sky was almost totally overcast with clouds coming in from the north. Before I could have a good look the stars and the nebula also disappeared in the clouds.