Iota Bootis 

Tomas Vazquez Chiscano
Star: Iota Bootis
Date and Time: 31/3/2001. 22:26:41 UT
Seeing: 4 <1 worst - 10 best> 
Location of Site: Sevilla. (Spain)
37º 24 N. 5º 58 W 
Site Classification: Urban 
Sky Darkness: 3 <Limiting Magnitude> 
Telescope: C8 D:203mm. Reducer Focal: F/6,3. 
Magnification: Camera CCD 
Eye Piece(s): -- 


   

Observation: Camera CCD ST-4. 
Time of Integration: 8 seconds. 
Filter (s): 
Software Lectura CCD: LUCAS 1.1 
Software Treatment: LAIA 3.2A 
Position Image: North up, Este left. 
Telescope Computer Interface: MICRO-GUIDER III. 
Planetariun and Telescope Control Program: ECU. "Earth Cerntered Universe" 

This double is of the easy ones of separating, the main star is > of magnitude of 4.76 and the secondary of 7.39. My measures are: 
D=34.85" with a position angle AP= 38.44º. 
 
 
 

 


 
Bob Hogeveen
Star: Iota Bootis
Date & Time: May 08 2001 
Seeing: 6 <1-10 Seeing Scale (10 best)>. 
Location of site: Annen, The Netherlands
(53ºN, 6ºE) 
Site classification: Village backyard
Sky darkness: 3.5 (UMI) <Limiting magnitude> 
Sky : Twilight and clouds coming in 
Telescope: Swarovski AT80 (80mm spottingscope), Meade LX10 (8" f/10 SCT)
Magnification: 20x, 50x
Harschaw's Scale: 2 (AT80), 3 (LX10) <1 to 5> 
With the spottingscope at 20x (and up to 40x) Iota and Kappa are in the same  FOV (together with a lot of other stars). This makes a wonderful view. Both doubles are  easily split at 20x, Kappa gives the best view, it's close and bright. Iota is a bit more  wide and the magnitude difference is larger. With LX10 at 50x Iota turns into an "average"  double.
 
 
 
 
 
 
 
 

 


 
Cor Berrevoets
Star: Iota Bootis
Date & Time: 11-may-2001 20:00 - 22:15 UT
Seeing: ? <1-10 Seeing Scale (10 best)>. 
Location of site: Ritthem, The Netherlands
51° 27' N, 003° 38' E
Site classification: Suburban
Sky darkness: 4.8 <Limiting magnitude> 
Telescope: Intes Micro 6" F10 Maksutov 
(35% obstruction)
Eyepieces: 7.5, 10, 15, 20 and
26 mm Plössls
Magnification: 60x 
Easy split at 26mm (~60x) with a greenish white primary and colourless 
companion 

 
Tim Leese
Star: Iota Bootis
Date & Time: 12 May 2001 ( 23:50 UT )
Seeing: 5-6 <1-10 Seeing Scale (10 best)>. 
Location of site: Cheshire. UK
53° 15' N -2º 33' W
Site classification: Suburban
Sky darkness: 4.3 (UMi) <Limiting magnitude> 
Conditions: Nice clear night, looking good. 
Telescope: 200mm f/6  Newtonian
mounted over a Vixen GP mount (manual slow motion).
Eyepieces:  9mm UO orthoscopic. 
Magnification: X133
Using X134 I observed a wide double star system. The primary appeared to be an off white colour with a pale yellow companion. This was a very nice double to observe. The PA of the compaion was estimated to be about 30deg. 

 
Ilario Melandri
Star: Iota Bootis
Date & Time: 26 May 2001,
19.32 – 21:08 UTC
Seeing: 8 <1-10 Seeing Scale (10 best)>. 
Location of site: S.Romualdo, Ravenna, Italy. Elevation: 0 m
Site classification: rural
Temperature: +19ºC -> +16ºC
Sky darkness: 4 <Limiting magnitude> 
Telescope: 150mm f/15 achromatic refractor
(lens by Romano Zen, Venice)
Eyepieces: Clave Plossl 16 mm
Magnification: 140x
 
 

   

 
Thad Robosson
Star: Iota Bootis
Date and Time: 5-29-01, 3:30UT 
Seeing: 7 <1 worst - 10 best> 
Location of Site: Phx, Az, USA 
Site Classification: Suburban
Sky conditions: Clear and nice. Nearly 1rst quarter Moon 
Sky Darkness: 4 <Limiting Magnitude>
Telescope: Meade 90mm ETX 
Magnification: 83x
Eye Piece(s): 2x barlow, 32mm Meade SuperWide, 10 & 15mm Vixen Lanthanums
83x easily seen.  Pure white primary with a white comp at approx 50* PA.  Rated a 4. 

 
Mary Flanagan
Star: Iota Bootis 
Date and Time: 17 Jun 2001 - 05:20 UT 
Seeing: 5 <1 worst - 10 best> 
Transparency: (1-10): 7
Location of Site: Apple Valley MN, USA 
93º 14' 25" W; 44º 45' 17" N 
Site Classification: Suburban 
Sky Darkness: 3 <Limiting Magnitude> 
Telescope: 12.5" f/5 Dobsonian 
Magnification: 50x 
Bright primary; I had some trouble with the color .... greenish yellow comes closest. Secondary was an intense blue. The magnitude difference seemed more one of size than of brightness. Probably a perceptual thing; I've noticed this before in other pairs.
Easy split at 50x.

 
Jim Jones
Star: Iota Bootis 
Date and Time: 06/20/01  0717 UTC
Seeing: 6 <1 worst - 10 best> 
Location of Site: Lake Oswego, Oregon
Site Classification: Suburban 
Sky Darkness: 4.0 <Limiting Magnitude>
Sky:  Moon: last quarter in Taurus.
Sky very bright.
Telescope: 80mm f/5  ST 80
Eye Piece(s):  42mm Ultima, 18mm Radian 
Magnification: 9x, 22x
Est PA 040d
Primary....yellow
Excellent view in the wide field of view of the ST80.
Double is set in a very interesting field including Theta, Iota and
Kappa Bootis.  Kappa is 35' to NW.   Theta is about 1.5 degrees to NE.

Iota makes establishes one corner of a box shaped asterism and is north of a kite shaped asterism. I was surprised that I could see the 4th star of the kite asterism at 11.4 mag with the ST80.  After sketching the double at 22x, I put the 42mm eyepiece in to sketch the field.

All in all, an enjoyable experience.