Struve 1964

David Jenkins
Star: Struve 1964
Date: 12 June 2006
Time:  5:00-7:30 UTC
Seeing: <1-10 Seeing Scale (10 best)>: 5
Transparency: <1-10 Scale (10 best)>: 8
Location of site:Orem, Utah USA
Latitude, 40.29694. Longitude, -111.69389
Site classification: Utah Valley urban area of 500,000 with strong light pollution due to acorn glass street lights which shoot light up and out – The bane of all local observers. Salt Lake City metro light dome to the northwest at 40 miles.
Conditions: Clear, breezy (as can be seen in some of the images), warm
Moon: Full moon raising late in observing session
Sky darkness: <Limiting magnitude>: 3.5
Telescope: Celestron GPS 11" on APT Wedge
Mount: Standard Celestron fork and tripod
Eyepieces: Meade Super Plossl – 32mm
Diagonal: Yes, Meade 1.25" flip mirror diagonal
Magnification: Approximately 350X using Nikon Coolpix 4500 and 4X zoom
Software: Reduc version 3.62 – Great software from Florent Losse. S33 group member.

 		Distance: 14.7, PA: 87
 

       

Richard Jepeal
Star: Struve 1964
Date: June 17, 2006 UT
Seeing: Vary, from 5/10 to 8/10 (Zenith)
Transparency: ---
Location of site: New Britain, Connecticut, USA
Site classification: Urban
Conditions:
Sky darkness:
Telescope: 8in Celestron Nexstar
Eyepieces:
Magnification:

 

  

William Schart
Star: Struve 1964
Date: 6/19/06
Time: 10:36 PM
Seeing: 4 out of 5
Transparency:
Location of site: Columbia, USA
Site classification: Suburban
Conditions: warm
Sky darkness: around mag 5 (LM)
Telescope: C8
Eyepieces: 25 and 10 mm
Magnification:  		Easy split almost 90. White.
       

Brian McInnerny
Star: Struve 1964
Date: 2006 June 30/ July 1
Time: 0030UT
Seeing: 5/10 (10 best)
Transparency: Hazy
Location of site: SW England Site
Site classification: Suburban Sky
Conditions:
Moon:
Sky darkness:  Naked eye Limiting mag:
Zeta Boo=3.8
Telescope: ETX 90EC (90mm)
Eyepieces:
Magnification:

Clearly split at x48. Estimated PA=80 degs, sep= 15"arc An orange tint to both stars ie,o-y/o-y
        

Steve Bodin
Star: Struve 1964
Date: 25 June 2006
Time: 11pm to midnight
Seeing: 5-6/10
Transparency: good
Location of site: Mattawa Wa, USA
46.7N,119.9W
Site classification: Rural
Conditions: 79F, no wind, dry
Sky darkness: limiting mag 6.5
Telescope: Meade 16 inch LX200GPS UHTC
Eyepieces: not used
maging: DX8263SL video camera at f30
Magnification: app. 1800x

 I know this is not a 'nut' as listed in out project, but there are two close components and one impossible companion making this pair actually a fivesome. Obvious, even at prime focus is that the eastern star is double, C and D. The main star has a B component, cataloged as Hu 1167, that is very difficult due to separation and magnitude difference. Finally the C star is an impossible 0.1 sec pair cataloged as WAK 1. Measured, AC 15.19 sec at 087.4 deg PA, CD 1.64 sec at 022.3 deg PA, AB 1.27 sec at 080.7 deg PA, AD 15.9 sec at 081.9 deg PA.


  
       

Wolfgang Vollmann
Star: Struve 1964
Date: 2006 July 6
Time: 21:00-23:00 UT
Seeing: 5 <1-10 Seeing Scale (10 best)>
Transparency: clear
Location of site: Vienna, Austria
Site classification: Suburban Sky
Conditions:
Moon:
Sky darkness: Naked eye limiting mag. 4.5
Telescope: 130/1040mm refractor
Eyepieces: n/a
Camera: SBIG ST237A
CCD Exposures: 6x10 seconds for astrometry and 6x1 seconds for distance/PA measurement.
Image measurement: astrometry with Astrometrica software and UCAC2 catalog (see http://www.astrometrica.at); with exact focal length and image orientation I measured distance and PA with AIP4WIN software. I took means of measuring all my images for a star. There is a scatter of 0.2 arcsec in separation and 0.2 deg in PA. Scatter in PA is much larger if the stars are very close.
Note: All images have north up and an image size of approximately 16x12 arc minutes

WDS 15382+3615 This pretty double star is 1/2 degree southwest of Zeta CrB which is a remarkable double itself. The image shows the two almost equally bright components A and C. Each one has a close companion B and D which are not resolved with my telescope at prime focus.

Measure: STF1964AC: year 2006.52 / distance 14.8 arcsec / PA 84.7 deg

         

Wolfgang Vollmann
Star: Struve 1964
Date: 2006 July 26
Time: 21:00-24:00 UT
Seeing: 5 <1-10 Seeing Scale (10 best)>
Transparency:  clear
Location of site: Vienna, Austria
Site classification: Suburban
Conditions:
Moon:
Sky darkness: 4.5 <Limiting magnitude>
Telescope: 130/1040mm refractor
Camera: SBIG ST237A CCD
Exposures: 6 or 12 x 10 seconds for astrometry. Distance/PA measurement was done with these images also except where noted (bright stars need shorter exposure times of 1 sec or less)
Image measurement: astrometry with Astrometrica software and UCAC2 or USNO B1.0 catalog (see http://www.astrometrica.at); with exact focal length and image orientation I measured distance and PA with AIP4WIN software. I took means of measuring all my images for a star. There is a scatter of 0.2 arcsec in separation and 0.2 deg in PA. Scatter in PA is much larger if the stars are very close. Note: All images have north up
Eyepieces: n/a
Magnification: n/a

 		I already measured AC for the project but only from 2 frames. Now I took the opportunity to take 12 more with exposure times of 1 and 0.1 seconds and remeasured the stars. Measure: STF1964AC: year 2006.57 / distance 15.0 arcsec / PA 84.3 deg Weighted average of 2 nights: STF1964AC: year 2006.56 / distance 15.0 arcsec / PA 84.3 deg


 
      
(c) 1998-2006 The Spirit of 33