Struve 3000

 
Richard Harshaw 
Star: Struve 3000
Date & Time: September 5, 2001,
0230 to 0510 UT
Seeing: 6 <1-10 Seeing Scale (10 best)>
Transparncy: 6 to 7 (variable, due to high hazy clouds) <1-10 Seeing Scale (10 best)>
Location of site: Northern Kansas City,
Missouri (USA). 39º15' N, 94º30'W
980 ft above Mean Sea Level
Site classification: suburban 
Sky darkness: -- <Limiting magnitude>
Telescope: Celestron C-8, C-11
Magnification: 104x, 311x
Harshaw Scale: 3 <1-5; 1 best>
ADS 16664
Position:  2319+2513  Rating:  3
Components:
 A:  9.63m, F5
 B:  9.83m, 3.4” @ 50 - 
Year of last AB Measure:  1999
Observed colors:  W, yW 

Observations: C8: Observed at 104x.  Nicely split at this low power! 
C11: Observed at 311x.  Faint and dull.

Notes: 1831 = 3.4" @ 51.

 


 
Jim Jones
Star: Struve 3000
Date & Time: 09/07/01   0609 UTC
Seeing: 5 <1-10 Seeing Scale (10 best)>
Location of site: Lake Oswego, Oregon
Site classification: Suburban
Sky darkness: 4.0 LM
Sky:  Full moon + 5 days.
Telescope: 8" LX50
Eye Pieces:  18mm Radian, 7mm Ortho, 2x Ultima
Magnification: 112x, 224x, 285x
Est PA without inst....055d
No observable color
Very dim, close, equal magnitude double set in a dim field.  Peanut with intermittent separation at 112x.  Clear separation at 224x and 285x.
 
 
 
 

 


 
Jim Phillips
Star: Struve 3000
Date & Time: Oct. 15, 2001
Seeing: 6 <1-10 Seeing Scale (10 best)>
Location of site: Hodges, South Carolina, USA
Site classification: Suburban.
Temperature: 72ºF
Sky darkness: --- <Limiting magnitude>
Telescope: AP 9" F/15 Apochromat
Magnification: ---
 
Faint white pair. In this light polluted area that's about as faint as I'd like to go. 
 

 
 

 
 
Stuart Clough
Star: Struve 3000
Date & Time: 28.10.01 2100 UT
Seeing: 6 <1-10 Seeing Scale (10 best)>
Location of site: Near Halifax
West Yorkshire, England.
Site classification: Suburban
Temperature: 8ºC
Sky darkness: 3.0 (U Mi) <Limiting magnitude>
Conditions: Variable cloud, Wind SW 12/15kts
Telescope: Orion Optics UK GX250
10"  f4.8 Newtonian on Vixen GP mount.
Eyepieces: 9 mm Ortho,  x2 Ultima Barlow
Magnification: x133,  x267
   
Lower magnification than  x267 just did not work. This quite faint double appeared extremely so at any power because of the nearby 12 day (90% illuminated) moon. 
Just trying to make out the nature of the image at lower power made the eye water!

At x267 the split image was visible at times of best seeing but there was no chance of 
detecting any coloration. This was beyond doubt the faintest that could be observed in the prevailing conditions.
 
Ambience: A beautiful day gave way to a  clear, brightly moonlit evening, the first after the clock's reversion to GMT. By the time I managed to get outside it was well after 20:00. The 12 day old moon was below Pegasus and at 90% phase was making it difficult to see anything beyond the brightest objects in the sky with the naked eye.

At least, the local security lights were less in evidence and it was warm for late October in a moderate breeze which spoiled the image a bit when it waywardly found its way into the lee of my garage.

Advancing cloud put paid to the night's activities just after 22:00