Struve 1888

Dave Jenkins
Star: Struve 1888
Date & Time: 5 July 2005
Seeing: 7 <1-10 Seeing Scale (10 best)>.
Transparency:
Location of site: Salt Lake City, Utah
40.3 N 111.7 W
Site classification: Urban area with heavy light pollution. All city lights are acorn style so all lighting goes up and out not down
Sky darkness: 2.5 with 5 best
Conditions: clear, no wind, warm, a little hazy
Moon: no moon
Telescope: Celestron Nexstar 11 GPS w/APT equatorial wedge
Mount: Celestron field tripod
Eyepieces: Meade Super Plossl 32mm - CP4500 Digital Camera @ 4x optical
zoom
Magnification: 350X
Diagonal: Not used
   
Separation: 6.5, PA: 315.5
 


Louis Marchesi
Star: Struve 1888
Date & Time: 11 July 2005 3:10 UTC
Seeing: Pickering 4
Transparency: Below Average
Location of site: New London Township, PA, US (+39d45m,-75d52m)
Site classification: Suburban/Rural
Sky darkness: Not determined
Conditions: Partly cloudy, calm, light dew, 18C (64F)
Moon: None (set a 3:14 UTC)
Telescope: TMB 152 f/7.9 Apochromatic Refractor
Mount: Losmandy G-11
Eyepieces: 14mm TMB Super Monocentric
Magnification: 86x
  
This system turned out to be both a joy and a disappointment. The main pair was a bright, white star along with a pale lime green (!) secondary. I think on another evening I would not have seen the comes as green, but it was a wonderful coloring to behold nonetheless. The disappointment is in that I did not use a higher magnfication. I did see the D star easily at 86x (white), but I missed the C star at this power. That is a disappointment in that I wasn't more thorough. I will have to visit Xi Bootis again and detect the C star, but more importantly I need to see if the B star is still green!


Steve Bodin
Star: Struve 1888
 Date & Time:14 July 2005, 11pm to 1am
Seeing: 4/5 <1-10 Seeing Scale (10 best)>
Transparency: good
Location of site: Mattawa WA, USA 46N 119W
Site classification: Rural
Sky darkness: Limit mag 6.5
Conditions: 81F, no wind, dry
Moon:
Telescope: Meade 16 LX200GPS
Eyepieces: not used
Additional: DX-8263SL color video camera at prime focus, f/10
Magnification: app. 600x
   

Decided to start with an old friend, beautiful colors, gold and orange. But the camera view tended to bleach the primary to an off white color, not enough dynamic range in video to get the range of brightness seen by the eye, maybe in a few years this will change. Did not chase down the faint component, will do again. Measured, 6.66 sec at 311 deg PA.


  


Morgan Spangle
Star: Struve 1888
 Date & Time:
Seeing: --- <1-10 Seeing Scale (10 best)>
Transparency:
Location of site: Larchmont, NY  40.55.26N 73.43.44W
Site classification: suburban
Sky darkness:
Telescope: Borg 101ED refractor, f/6.3
Mount: Vixen GPDX, SkySensor2000PC goto
Eyepieces: not used
CCD: SBIG ST237A @ 2.39 arcseconds per pixel
Software: Astroplanner; CCDSoft v.5; theSky v.6 Pro;Adobe photoshop
      

STF 1888 AC 69.4"  340.8 deg
STF 1888 AD 158.3"  286.0 deg


 


Steve Bodin
Star: Struve 1888
 Date & Time:15 August 2005, 9pm to 10pm
Seeing: 2-3 <1-10 Seeing Scale (10 best)>
Transparency: fair
Location of site: Mattawa WA, USA 46N 119W
Site classification: Rural
Sky darkness: limiting mag 5 due bright moon
Conditions: 80F, windy after 10pm
Moon:
Telescope: Meade 16 LX200GPS
Eyepieces: not used
Additional: DX8263SL video camera at prime focus, f10 and 2x
Magnification: app. 600x and 1200x
   

Wanted to try for the C component, very faint and I confused it with the D star in real time viewing. Must be fainter than the 12.6 mag listed maybe nearer 14. Measurements, AC 66.8 sec at 340.7 deg PA, and AD 150.5 sec at 286.5 deg PA.

 

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