Struve 2372 Aa-B 

Richard Harshaw 
Star: Struve 2372 Aa-B 
Date & Time: 6 July, 2001, 03:00 to 04:55, UT
Seeing: 8 <1-10 Seeing Scale (10 best)>. 
Transparency: 6-7/10 ,variable, due to high hazy clouds 
Location of site: Northern Kansas City, Missouri. 39º 15' N, 94º 30' W, 980 ft above Mean Sea Level
Site classification: Suburban
Sky darkness:  <Limiting magnitude>
Telescope: Celestron C-11
Eyepieces: 25mm Plossl 
Magnification: 112x		 Position:  1842+3445 
Magnitudes:  6.49 (B5 V), 7.50, 8.18 (B8 V), 11.4 
Sep/PA's:   Aa- 0.1-/327+,  AaB- 25=/83=, AaC- 91+/65= 
Year of this measurement:  1996 
Distance (light years):  1,320? 
Luminosity (in suns):  364? 
Colors noted:  W, "a" not detected, B, W 

Comments:  C is a difficult pickup.  A nice faint triangle lies to the ESE. 
Star A is a spectroscopic binary. 
Hipparchos/Tycho data show different distances for these stars; they may be an optical system.  The stars have different proper motions. 
First measure AB:  25.1" @ 84. 
Rating:  3 
 

 
Bob Hogeveen
Star: Struve 2372 Aa-B 
Date & Time: July 8, 2001; 0:30 - 01.15 
Seeing: 6 <1-10 Seeing Scale (10 best)>. 
Location of site: Annen, The Netherlands (53 N, 6 E)
Site classification: Village-backyard
Sky darkness: 4 <Limiting magnitude>
Telescope: Meade SCT 8" f/10 
Eyepieces: Ultima 30 mm, TV plossl 20mm, LV 15mm, LV 7mm 
Magnification: 67x		 Viewed at 67x the pair is wide and bright. A is a bit yellowish. I will have to look for the C-companion another time, it was far out of reach with the given sky conditions. 
Rating: 3 

 

 
William Schart 
Star: Struve 2372 Aa-B 
Date & Time: July/9/01 0500 to 0635 UT
Seeing: 7 <1-10 Seeing Scale (10 best)>. 
Location of site: Killeen, TX, USA
Site classification: Suburban
Sky darkness: 4 <Limiting magnitude>
Temperature: In the 80's F (30's C). Slight breeze. 
Telescope: Celestar 8" SCT
Eyepieces:  25mm, 17mm, 10mm
Magnification: 80x, 120x, 200x		 A wide pair with some magnitude difference. They appeared blue to me. I tried high power to see if I could make out any other members, but no go.

 

 
Jim Jones
Star: Struve 2372 Aa-B
Date & Time: 07/09/01  0615 UTC
Seeing: 6 <1-10 Seeing Scale (10 best)>. 
Transparency: /10 
Location of site: Lake Oswego, Oregon 
Site classification: Suburban
Sky darkness: 4.0 <Limiting magnitude>
Sky: Full Moon + 4 days
Telescope: 8 inch LX50 SCT 
Eyepieces:  18mm Radian, 12.5mm CMG
Magnification: 112x, 160x		 Primary....yellow
Companion....blue-white

Measured PA and Sep taken with Celestron
Micro-Guide (CMG).  The average of 5 measurements.
Measured PA......83d
Measured Sep.....25.2"
 

 
John M. Ryan 
Star: Struve 2372 Aa-B 
Date & Time: 19 July 2001 ( 21:00 UT ).
Seeing: 6+ <1-10 Seeing Scale (10 best)>. 
Location of site: Barreras, Salamanca, Spain.
Site classification: Rural,Suburban.
Conditions: no moon, fairly dry but with gusts of wind.
Sky darkness: 5+, some light due to street lights in the village. <Limiting magnitude> 
Telescope: Meade 7" Mak Cas mounted on a Losmandy GM8. 
Eyepieces: 20mm plossl
Magnification: 134X
Harshaw Scale: 3 <1-5; 1 best>		 Easy split at 134X. Fairly wide double. Both components white.

 
Luis Argüelles
Star: Struve 2372 Aa-B 
Date & Time: 21st, July, 2001. 21:00 – 23:05UT
Seeing: 7-8 <1-10 Seeing Scale (10 best)>
Transparency: 3-4 <0:worst -10:best >
Location of site: Quintueles, Gijón, Spain.  43º 32N, 5º 55W. Altitude: 20 m.
Site classification: Suburban
Sky darkness: 3.0 - 3.5 <Limiting magnitude> 
Temperature: about 15º C
Conditions: A lot of haze and moisture. Seeing is rather good, but haze actuates like a light diffusor and that makes difficult observe stars fainter that 10
magnitude.
Humidity: about 90%
Telescope: Vixen 102 4" achromatic refractor
Eyepieces: 35, 10 and 5mm Baader-Planetarium Eudiascopics
Magnification: 100x
Harschaw Scale: 2-3 <From 1 to 5. 1 = Great, 5 = poor interest>		 This double is a lot easier to split than the previous ones in the Lyra 33 list. The difference of magnitude is obvious and the main component appears as white or white-blue, while the secondary is observed with a pale yellowish tone. At 100x the split is clear and has a certain remember to Albireo.

 
Stuart Clough
Star: Struve 2372 Aa-B 
Date & Time: 27.07.01. 2210 UT
Seeing: 7 <1-10 Seeing Scale (10 best)>. 
Location of site: Near Halifax
West Yorkshire, England.
Site classification: Suburban
Sky darkness: 4.4 (U Mi) <Limiting magnitude> 
Temperature: 22 C
Conditions: No cloud, Lt. Airs, balmy.
Telescope: Orion Optics UK GX250
10"  f4.8 Newtonian on Vixen GP mount.
Eyepieces: 20 mm Plossl, 25 mm Ortho.
Magnification: x60, x45		 Easy split at x60, a white primary  with a pale blue companion in a pleasant field of faint stars. In fact the view was better at lower power- x45 was rather more interesting in every aspect

 
Philippe Dejocas
Star: Struve 2372 Aa-B
Date & Time: July 28 2001
Seeing: 6.5 <1-10 Seeing Scale (10 best)>
Location of site: Canada
Site classification: Suburban
Conditions: Clean skies and warm temperatures.
Sky darkness: 4.5 <Limiting magnitude> 
Telescope: 6inch/f5 newt
Magnification: 40x

 

 A *** with a pale yellow/white combo, all resolved, incl. the 11.4 cpn, at 40x. STF 2352, at 40x also, made me work. I got a visual of ~ 10" - WWN/W (survey says 16.7" - 286°, but that's 1929)

 
 
 

 

 
PJ Anway
Star: Struve 2372 Aa-B
Date & Time: August, 18, 2001  03:00 UT
Seeing: 7 <1-10 Seeing Scale (10 best)>
Transparency:  <0:worst -10:best >
Location of site: Starfest @ Mount Forest, Ontario, Canada
Site classification: Rural
Sky darkness: 5.5 <Limiting magnitude> 
Temperature: 75°F, 24°C
Conditions: No moon, Cloudy with large holes
Telescope: Zeiss Telementor 63mm/840mm refractor on equatorial mount
Eyepieces: Televue 18mm, 12mm radians + 2.4X barlow
Magnification: 47X, 70X, 112X, 168X

 

 An easy split at 47X; no color seen.
 

 

 
Jim Phillips
Star: Struve 2372 Aa-B
Date & Time: July 21, 2001, 9:00-11:00 EDT
Seeing: 7-8 <1-10 Seeing Scale (10 best)>
Location of site: Hodges, SC, USA
Site classification: Suburban
Sky darkness: -- <Limiting magnitude> 
Temperature: 65 degrees F
Telescope: AP 155 F/7 Apo
Magnification: 109x

 

 Nice wide double. White, bluish (109X).
 

 

 
Tim Leese
Star: Struve 2372 Aa-B
Date & Time: 26-August-2001
( 21:45 UT )
Seeing: 6 <1-10 Seeing Scale (10 best)>
Location of site: Northwich, Cheshire. UK. (53° 15' N -2º 33' W).
Site classification: Suburban
Conditions: Nice and clear with drifting high cloud at times.
Sky darkness: ? <Limiting magnitude> 
Telescope: 200mm f/6 Newtonian reflector.
Mounted over a Vixen GP mount (manual slow motion).
Eyepieces: 18mm Orthoscopic, CMG with X3.35 barlow.
Magnification: X67, X322.

 

 Using an orthoscopic eyepiece at X67 I found a cream coloured star with a blue companion. A nice field of view with some faint stars nearby.

Using the CMG at X322 an average of three measures gave the distance of the companion to be 24.6 arcseconds in PA 82degrees.
 
 
 

 

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