Struve 2861
Richard Harshaw 
Star: Struve 2861
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: 112x
Harshaw Scale: 2 <1-5; 1 best>
HD Number 209859
ADS 15627
Position:  2206+2048  Rating:  2
Components:
 A:  7.6m, A4 V
 B:  8.3m, 7” @ 221 + 
Year of last AB Measure:  1966
Distance (l.y.): 520, Luminosity (Suns): 30
Observed colors:  W, W 

Observations: Observed at 112x.  W and bW.  Nice pair, but a bit dim.

Notes: First measure 7.1" @ 220.
The stars have different proper motions.

 


 
Stuart Clough
Star: Struve 2861
Date & Time: 8th September 2001. 2045UT
Seeing: 3-4 <1-10 Seeing Scale (10 best)>
Location of site: Near Halifax West Yorkshire, England.
Site classification: Suburban
Conditions: Clear sky, fresh NNW'ly breeze
Temperature: 8C 
Sky darkness: 4.8 <Limiting magnitude>
Telescope: Orion Optics UK GX250 10"  f4.8 Newtonian on Vixen GP mount.
Eyepieces: 20mm Plossl
Magnification: x60
A pair of white stars of fairly similar magnitude, giving a very clear split at x60.
 
 
 
 
 

 


 
John M. Ryan
Star: Struve 2861
Date & Time: 11 Sept 2001 ( 21:00 UT)
Seeing: 6+ <1-10 Seeing Scale (10 best)>
Location of site: Barreras, Salamanca, Spain.
Site classification: Rural,Suburban.
Conditions: fairly dry but with gusts of wind.
Sky darkness: 5+ <Limiting magnitude>
Telescope: Meade 8" SCT mounted on a Losmandy GM8.
Eyepieces: 25mm ultrascopic, 20mm plossl
Magnification: 80X, 100X 
Harschaw's Escale: 3 <1: Excellent, 5: Poor>
Nice steady split with the 25mm at 80X better at 100X. Easy to note the similar magnitudes. Both white.

Ambience: These six doubles I worked on the nights of Sept. 11 and 12 just before I left for the big reunion the following weekend in the north of Spain. Sept. 11 was the day of the big terrorist attack in the United States and I remember telling myself after being down all day that you have to get the telescope out and track down some doubles to get your mind off the terrible events. I remember being like a zombie but I did get three doubles on the 11th and three more on the 12th. As far as the ambience is concerned I don't remember nothing of that.
 

 


 
Jim Phillips
Star: Struve 2861
Date & Time: Oct. 4, 2001, 8:00-9:15 EDT
Seeing: 7 <1-10 Seeing Scale (10 best)>
Location of site: Charleston, South Carolina, USA
Site classification: Suburban.
Temperature: 70ºF
Sky darkness: --- <Limiting magnitude>
Telescope: AP 155 F/7 Apochromat
Magnification: --
Nice white pair.

 
William Schart
Star: Struve 2861
Date & Time: 13 Oct 2001
9:20 - 10:45 pm CDT
Seeing: so-so
Location of site: Killeen, TX 
Site classification: Suburban 
Sky darkness: 4 <Limiting magnitude>
Telescope: 8" SCT 
Magnification: 80x, 200x, 165x (CMG)
A pair of almost equal mag 8 stars, easily split at low power. The look white to me. Sep 7, PA 220.6 (ave 5 meas).
 
 
 
 
 
 
 
 
 
 
 

 


 
Mary Flanagan
Star: Struve 2861
Date & Time: 21 Oct 2001 02:59 UT; 20 Oct 9:59 CDT
Seeing: 6 <1-10 Seeing Scale (10 best)>
Transparency: 6 <1-10 Seeing Scale (10 best)>
Location of site: Apple Valley MN, USA
93º 14m 25s W; 44º 45m 17s N
Site classification: Suburban.
Sky darkness: 3 <Limiting magnitude>
Telescope: 12.5" f/5 Dobsonian
Magnification: 106x 
Easily split white pair, close in magnitude.
 
 
 
 
 
 
 
 
 
 

 

 
 
Dave Moore 
Star: Struve 2861
Date & Time: 21st October 2001
19.55-22.00 BST 
Seeing: 3 <1-10 Seeing Scale (10 best)>
Transparency: 7 <1-10 Seeing Scale (10 best)>
Location of site: Charminster, Bournemouth, Dorset
51ºN, 1ºW
Site classification: Suburban
Sky darkness: 4.3 <Limiting magnitude>
Moon: 4 Days Old, but below horizon
Bootle Scale: 8 (Suburban/Urban)
Telescope: 8" Meade LX-90 SCT f/10 (Lucy)
Eyepieces: 30mm Celestron Ultima (67x), 
26mm Meade Super Plossl (77x), 
12.5mm Celestron Ultima (160x), 
2x Barlow
Magnification used: 67x, 160x
     
Split well at 160x and fairly tight at 67x. Two white stars of equal brightness.