33 Doubles Observing Projects: Struve 283

Struve 283

Carol Lakomiak				strgzr52@hotmail.com
Star: Struve 283 Date & Time: July 12-13, 2003 Seeing: 3 [see http://www.backyard-astro.com/Logs/logsreport.html Transparency: --- Location of site: 45°N // Tomahawk WI, USA Site classification: Rural Temperature: 56°F at 10pm CDT, dropping to 50°F by 3:15am CDT Sky darkness: 10/10 (Thompson Scale) Conditions: Not too much dew; extreme Lunar interference; generally pleasant Telescope: Meade 8" f/10 LX-10 (Snoopy ) Eyepieces: 32mm, 13.8mm, 9mm, 5mm Magnification: 63x, 147x, 226x, 406x				The pair is located at the lower right corner of another keystone asterism. the asterism itself is located to the lower left of open cluster NGC 1027. At 63x, the pair is slightly gold. 147x brought a black split, more easily seen at 226x.

Luis Argüelles

luis.arguelles@wanadoo.es

Star: Struve 283
Date: 29, July, 2003 , 23:45 -> 2:45 local time
Location of Site: Sena de Luna, Spain
42.55N, 05.57W
Seeing: 8->7 <1-10 Seeing scale (10 best)>
Transparency: 8->7 <1-10 scale (10 best)>
Other conditions: No Moon.
Temperature:18ºC
Altitude: 1,200 mts (3,940 ft)
Site classification: Rural
Sky darkness: about 5.5
Telescope: Takahashi FS-102
Mount: Vixen GP + Skysensor 2000
Eyepieces: 9mm Nagler, 5mm and 3.8mm Eudiascopics
Diagonal: Zeiss prism diagonal
Magnifications: 91x, 164x, 215x

I center it first with the 9mm Nagler at 91x, noting only a orange hue. Some minutes of arc away there is another interesting and nice double where I would estimate about magnitude 7 for the primary and about 8.5 for the secondary with a separation about 5 seconds of arc.

Switching to the 5mm Eudiascopic, the split is clear for some moments with a "black hair" between components. The most interesting side of this double is its orange-yellow hue. The difference of magnitudes is clear.

I would like to point out that with the given observing conditions and the relative low altitude over the horizon, this double is a bit hard to split. Nevertheless, I suspect it would be childs' play for this telescope to split this at about 165x with more favourable conditions.