Burnham (BU) 584 

Glen Chapman
Star: Burnham (BU) 584 
Date & Time: 17/3/01  23.05 UT + 11.00
Seeing: 8.5 to 9.5 <1-10 Seeing Scale (10 best)>   
Location of site: Seven Hills, NSW, Australia
Site classification: Semi Urban   
Sky darkness: 4.3 <Limiting magnitude>
Sky condition: No Moon, No clouds, slight breeze
Temperature: 24ºC
Telescope: 203mm F6 Dobsonian
Magnification: 50X, 160X		 Description: Split A & C at 50. Colour noted as blue tinged white.
Notes: Another difficult find. Need pinwheel to confirm attending C star. No sign of B Did not go over 160X due to restricting reference stars to much.

  
 
 
 
 
 

 
 
 
Ilario Melandri
Star: Burnham (BU) 584
Date & Time: 19 Mar 2001
Seeing: 6 <1-10 Seeing Scale (10 best)>   
Location of site: S.Romualdo, Ravenna, Italy
Site classification: Rural  
Sky darkness: 4.5 <Telescope Limiting magnitude>
Temperature: +11ºC
Telescope: 150mm f/15 achromatic refractor
(lens by Romano Zen, Venice)
Eyepiece(s): Clave Plossl 16 mm)
Magnification: 140 x 
   		  
    
 

 
William L. Schart
Star: Burnham (BU) 584 
Date & Time: 3/21/01 8:20 pm CST 
Seeing: 7 <1-10 Seeing Scale (10 best)>  
Location of site: Killeen, TX (Lat 31 N, Elev 600 ft)  
Site classification: Suburban  
Sky darkness: 3.5 <Limiting magnitude> 
Moon:  none
Telescope: Celestar 8” SCT
Magnification: 78x, 120x, 203x 		 This was a mystery to me. When I zeroed in on the location, I saw a nice triangular asterism and thought ?here it is.? But when I started to measure it, the separations were approximately twice the published figures. It should appear as a right triangle with one leg about twice the other, but I could find nothing in the area that matched.
 
 

 
 

 
Jim Jones
Star: Burnham (BU) 584 
Date and Time: 3/23/01 04:16 UTC
Seeing: 7 <1 worst - 10 best> 
Location of Site: Lake Oswego, Oregon
Site Classification: Suburban 
Sky Darkness: 4.0 <Limiting Magnitude>
Telescope: 8 inch LX50 SCT
Magnification: 112x, 160x
Eye Piece(s): 18 mm Radian, 12.5 mm CMG 		 Very fine four star (only three visible) system in the heart of Beehive (M44).  The three visible starsmake up a tall isosceles triangle 10' to the SW of STF 1254.  The 4th star will be very difficult since it is 5 magnitudes dimmer than the primary and only 1.3" separation.

Attempted to measure with CMG and became very confused.  Retired to study the WDS catalog and realized that I was measuring DC rather than AD.  Measured DC to be 100.1" separation and 87d PA.
 
Using the ST80 is really working out well.  Being able to get a quick wide field view adds much enjoyment to observing.  The ST80 actually gave a superior view of Iota's companion than the 8" SCT.  Perhaps supporting Ric Hill's paper?  I suspect that there will be times when I use the 8" SCT for a finder for the 80mm.
 
Ambience: We had very nice spring evenings and even had a few birds holding forth in the early evening.  Very quiet except for the buzz of a few mosquitoes.  Mosquitoes in March. Not suppose to happen.
 

 
Philippe Dejocas
Star: Burnham (BU) 584 
Date & Time:  April 4 and 5 2001 
Seeing: 7.5 <1-10 Seeing Scale (10 best)>. 
Location of site: Ottawa/Hull, Canada 
Site classification: suburban, urban
Sky darkness: ~ 4.3- UMi <Limiting magnitude> 
Temperature: 8°C/ 2°C (beg/end) 
Humidity : below 50% 
Sky : Dark blue, even with the presence of 
the moon on both nights. 
Telescope: Aldebaran 6" f5 Newtonian
Magnification: 30x, 225x		 Going after those two gave me a chance to sketch  M44 ( a strange omission when I consider the number of times I've looked at it). Everything was resolved at 30x except
that 11.9 mg cpn of Bur 584, the one 1.3" from its 6.9 primary; that was a
bit much for me even at 225x. What I got instead was a 12 mg star about 40 "
N/NNE.

 
 

 
Luis Argüelles
Star: Burnham (BU) 584 
Date & Time: Friday, 13th, April 2001, 21:30 UT
Site of Observation: Near Valladolid, Spain
Site Clasification: Suburban
Seeing: ?? <1-10 Seeing Scale (10 best)>
Sky darkness: About 4 <Limiting magnitude> Transparency: 7 
Temperature: About 2ºC 
Conditions: Very strong wind (maybe about 50 km/h; thermic sensation about -10ºC) 
Telescope: Televue Ranger 
Magnification: 24x 
Eye Piece(s): Baader Eudiascopic 20mm 		 The ugly wind makes imposible to go higher than 24x this night of observation and I’m amazed that the Manfrotto tripod allows some observing in this conditions. Anyway, at 24x everything is inmersed in an stellar dance and the sensation is like hand-holding a 20x60 binoculars, making really difficult to star-hopping. It makes also impossible to determine seeing, although maybe it would be about 6-7. 

Due to this, and trying to observe some doubles in Cancer, I aim the Ranger using 24x towards M44 that appears barely visible naked-eye. Immediately this fine cluster enters the field of view. 

The more evident double while observing M44 is Burnham 584. This beautiful multiple system, as pointed out in a previous observing report by Jim Jones, takes the form of an isosceles triangle (fourth component at 1.3” separation and a magnitude of 11.9 is not reachable by the Televue Ranger abilities). 

I observe all the stars with a similar yellowish coloration and the image is just beautiful when for only few instants the wind slows a bit. I can’t estimate difference of magnitude between components. 
  

 
Thad Robosson
Star: Burnham (BU) 584 
Date & Time: 1:30 to 3:30 UT, 4/24 (UT) 
Seeing: 6~7 <1-10 Seeing Scale (10 best)>
Transparency: About 3~3.5/10 
Location of site: Phoenix, USA
33º 32.674N, -112º 08.029W
Site classification: n
Sky darkness: -- <Limiting magnitude>
Weather: Clear, warm, very slight breeze. 
Temperature: 
Telescope:  8" f/6 newtonian on Eq mount 
with wonderfully large setting circles 
Eyepieces: Vixen Lanthanum 10 and 15mm, 
Meade 32 mm Super wide, Celestron 2x barlow, 
Teleview  5x powermate. 
Magnification: 400x		 Inside the Beehive, a wonderfully wide set.  Went up to 400x in a vain attempt to capture the 11th mag comp.  Est PA at 165* and 250*.  All comp seen were white.  Rated a 3.