Burnham 152

 
John M. Ryan
Star: Burnham 152
Date & Time: Monday July 8, 2002,
9:00UTC
Seeing: 6-7 <1-10 Seeing Scale (10 best)>
Transparency:  <1-10, 10 best>
Location of site: Barreras, Salamanca, Spain.
Site classification: Rural, Suburban
Sky darkness: 5+  <Limiting magnitude>
Conditions: No moon , clear, medium wind with temp. about 12º C
Telescope: TeleVue 101 refractor mounted on a Losmandy GM8
Eyepieces: 10mm, 6.4 plossels and 3mm Radian
Magnification: 54X, 84X and 180X
Harshaw Scale: 2 <1-5; 1 best>
   		 This is a close double at 1.12 separation which is right at the limit of resolution of the TeleVue 101- 4" refractor. I was able to get elongation and notching of the double with the 3mm Radian at 180X but not much more. At times it looked like it was going to open up into a figure 8 but the seeing was normal or less to prevent it. 
 
 
 
 
 
 
 
 
 
 

 

 
Steve Bodin
Star: Burnham 152
Date & Time: Visual on 22 July 2002, Video on 24 July
Seeing: 6-8 <1-10 Seeing Scale (10 best)>
Transparency: fair
Location: Silverdale WA, USA
47N,123W
Site classification: Suburban
Sky darkness: 4 <Limiting magnitude>
Conditions: No wind, some haze, some dew
Telescope: Meade ETX102,Celestron C8,
17.5 DOB the 'Bigdog'
Eyepieces: 19mm Televue, 12.5 ortho, 10mm Homebuilt, 7 mm ortho
Magnification: 
Additional: PC164C video		 This was a difficult target. The companion seemed fainter than the list indicates and the DI higher. The object was additionally difficult to observe with a fork mounted scope and necessitated some double jointed neck work. Viewed with the C8 and a 2x barlow with a 12.5 mm ortho about 320x. The primary seemed yellow and the secondary maybe also yellow, but difficult to tell.  The WDS list the magnitudes at 7.2 and 8.8 vice 7.3 and 8.1. Video camera captured the double with a 3x barlow in the C8 . Measurements: 1.2 sec at 093.7 deg PA.

    
  

 
Luis Argüelles
Star: Burnham 152
Date & Time: 13, August, 2002, 
01:05 am local time
Seeing: 6->7 <1-10 Seeing Scale (10 best)>. 
Transparency: 7
Location of site: Sena de Luna, Spain
Elevation: 1,200 m.
Site classification: Rural
Temperature: 16ºC
Humidity: ~ 45%
Sky darkness: ~4.5 <Limiting magnitude> 
Telescope: Takahashi FS-102
Mount: Vixen GP w/Skysensor 2000
Eyepieces: 3.8mm Eudiascopic
Magnification: 216x
HS: 4 <1-5 Scale (1 best)>
 		 I go up in magnification until 216x with the 3.8mm Eudiascopic. With this seeing this double is extremely difficult to observe as a double. Anyway, in the moments when seeing improves, a clear elongation appears.  I suspect separation is maybe a bit more than the listed 1.1 arcseconds. Along really short times I think I get the split.
 

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