33 Doubles Observing Projects: Ottto Struve 266

Ottto Struve 266

Tim Leese

Star: Ottto Struve 266
Date & Time: 2 / 3 April 2005
20:30UT-00:50UT
Seeing: 6/7 <1-10 Seeing Scale (10 best)>
Transparency: <1 worst - 10 best>
Location of site: Northwich, Cheshire. UK.
(53° 15' N -2º 33' W).
Site classification: Suburban
Conditions: Nice and clear, a slight haze at times.
Moon:
Sky darkness: 3.0 UMi <Limiting magnitude>
Telescope: 200mm f/6 Newtonian reflector
Mount: Vixen GP
Eyepieces: 30 mm Ultima,18mm,9mm & 6mm orthoscopics.
Magnification: x40,x67,x133,x200
Measure--CMG+3.35 barlow(x322)

9mm Or---------A nice and tight split of this faint double; both stars appeared to be white.

9mm Or + x2 barlow-----Confirm split with the 9mm. Two white stars with perhaps a tinge of blue in the companion. The PA of the companion was estimated( visual ) to be on the N-S line, 360 degrees.

Louis Marchesi				lmarchesi@yahoo.com
Star: Otto Struve 266 Date & Time: 19 April 2005 2:00 to 5:00 UTC Seeing: Pickering 7/8 Transparency: Average Location of site: New London Township, PA, US (+39d45m,-75d52m) Site classification: Suburban/Rural Conditions: Clear, calm, 10C (50F) Sky darkness: Not determined Moon: 73% (10.2 day) waxing gibbous Telescope: TMB152 f/7.9 Apochromatic Refractor Mount: Losmandy G-11 Eyepieces: Baader Mark V Binocular Viewer with 1.7x Glaspath Compensator and 24 mm TeleVue Panoptics Binocular Viewer with no compensator and 5mm TMB Super Monocentrics, Binocular Viewer with 1.7x compensator and 5mm TMB Super Monocentrics Magnification: 85x, 240x, 408x				Again, this system was a bit difficult owing to its faintness, but I managed the split at 85x. Both stars were white.

Steve Bodin				sdbodin@hotmail.com
Star: Otto Struve 266 Date & Time: 25 April 2005, 10 pm to 1 am local Seeing:4-5 <1-10 Seeing Scale (10 best)> Transparency: good Location of site: Mattawa WA, USA 46N 118W Site classification: rural Conditions: temp 61F, dry no wind Moon: Sky darkness: 6.5 <Limiting magnitude> Telescope: Meade 16" LX200GPS Eyepieces: not used Magnification: DX-8263SL color video camera at prime focus Camera: app. 666x				Tight for prime focus, even with a 16, but split anyway. Primary a warm color, creamy white and secondary blue. Measured: 1.7 sec at 355 deg PA.