33 Doubles Observing Projects: Struve 1828

Struve 1828

Steve Bodin				sdbodin@hotmail.com
Star: Struve 1828 Date & Time: 26 May 2005, 10pm to midnight Seeing: 5-6/10, degrading to 4/10 Transparency: fair Location of site: Silverdale Wa, USA, 47N,123W Site classification: Suburb Conditions: 55F, no wind, dry Sky darkness: limiting mag 5.6 Moon: Telescope: Celestron C8 Eyepieces: not used Imaging: DX8263SL video camera at prime focus, and 3x Magnification: app. 333x, 1000x				Very faint close pair, had to integrate the videocamera at x16 to gather enough light. Twin blue suns at 2.34 sec 156.5 deg PA.

Alessandro Bertoglio				alessandro.bertoglio@fastwebnet.it
Star: Struve 1828 Date & Time: 24 May 2005 22.14 UTC Seeing: III - IV Antoniadi Transparency: Location of site: Turin, Italy, 4504N 0742E Site classification: Urban area with strong light pollution Conditions: clear, no wind, mild temperature Moon: quite fastidious full moon Sky darkness: 3 (limiting magnitude) Telescope: Takahashi Mewlon 300, Dall-Kirkham 300/3572 reflector Eyepieces: Televue Plossl 15 mm. Magnification: 238X Diagonal: Yes, Televue 2" Everbrite				Although already resolved at 238X during the quietest moments, it is a rather difficult pair: the stars are faint and the separation is pretty closer than the S33 published 2" separation so I could split it only during the more favourable moments. This pair is considerably balanced with an extimated difference of about a few decimals of magnitude (it's difficult to get an impression about what is the primary) and is composed by two whitish stars. No rings. Extimated PA about 175 degrees. Surely this pair changed separation and position angle since the publication of Burnham's Celestial Handbook. Fine double star for medium instruments.

Florent Losse				hfosaf@yahoo.fr
Star: Struve 1828 Date & Time: May 27-28th, 2005 Seeing: 6/10 Transparency: Good, thin clouds running Location of site: St Pardon de Conques, France 4433N 0012W Site classification: Rural Conditions: Sky darkness: m=6 Telescope: - visual : T115, guidescope suited with a 20mm eyepiece (G=45x) - imaging : homemade Newt T200, Barlow 3x, Audine K400 (sampling 0"43/px) Reductions: done with a future release of Reduc. Eyepieces: 20mm Magnification: 45x				not splitted with the T115/45x, not surprising. Few images readable to make serious measure, 162°1 / 2"28 (scattered)