Burnham 997 

Richard Harshaw
Star: Burnham 997 (HD 3; SAO 36042; ADS 41) 
Location of site: Northern Kansas City, Missouri (USA) 
94d 30m west longitude, 39d 15m north latitude 
980 ft above Mean Sea Level 
Date of observations (UT): 03:30, Oct 17, 2000 
Site classification: suburban 
Sky conditions
seeing-- 8 out of 10 
transparency-- 7 out of 10 
limiting visual magnitude-- 4.5 mag 
Telescope: Celestron C-8 
Eyepiece: 10mm Ortho (207x) 
 
 
Sep/PA's:  3.8" / 337 - 
Year of last measurement:  1998 
Distance (light years):  190 
Luminosity (in suns):  15 
Eyepiece and magnification:  10mm Ortho (207x) 
Colors noted:  W and bW. 

It was split at 104x, but looked better at 207x.  The field is very nice here. 
I'd rate it a 3 out of 5. 
 

 
 
Rafael Benavides
Star: Burnham 997 (HD 3; SAO 36042; ADS 41) 
Date & Time: 31-October-2000 (22 h 00 m UT) 
Seeing: 7.5 <1-10 Seeing Scale (10 best)> 
Location of site: Posadas (Córdoba), Spain 
37º 48' N - 5º 08' 30" W 
100 mts over sea level 
Site classification: Suburban 
Sky darkness: 6.1 <Limiting magnitude>  
Temperature: 7ºC 
Telescope: Helios 120 mm f/8.3 achromatic refractor 
Eye Piece(s): Plossl 10 mm, Microguide 12.5 mm, 2x Barlow, diagonal prism. 
  
 
Star: Burnham  997 
         00 h 04 m 57.51 s + 45º 40' 26.2" 
        magnitudes:   7.54  (F8),   9.3        (Guide 6.0.) 
        WDS 1996: 4"0 / 338º 

Observations: Using Plossl 10mm at 100x it separated into a very close pair. The primary seemed peach and the companion pale red. The secondary was dazzled with MicroGuide, but I was able to measure at 263x giving an estimated PA of 340º and a separation of 4"08 (average of 3 measurements) 
 
 
 

 
 
Ilario Melandri
Star: Burnham 997 (HD 3; SAO 36042; ADS 41) 
Date & Time: 1 nov 2000 , 19.54 UT 
Seeing: 6 <1-10 Seeing Scale (10 best)>  
Location of site: Italy, Ravenna, San Romualdo, Lat 44 32’N Lon 12 08’E 
Elevation: 0 m 
Site classification: Rural  
Sky darkness: 4.5 <Limiting magnitude> 
Temperature: +9C 
Telescope: 150 mm f/15 achromatic refractor (lens by Romano Zen, Venice). 
Magnification: 140x (Plossl 16mm) 
 
  
 
 
Susan Delaney
Star: Burnham 997 (HD 3; SAO 36042; ADS 41) 
Date & Time: 2000-11-21 
(02:00 - 04:30 UT) 
Seeing: 8 <1-10 Seeing Scale (10 best)>. 
Transparency: 9/10 
Temperature: 32 F, w/wind chill 14 F 
Location of site: Fairfield, CT, USA  
Site classification: Suburban   
Sky darkness: 4.7 <Limiting magnitude> 
Telescope: Discovery 10" DHQ f/5.6 Dobsonian 
Eyepieces and Magnification: 
5mm Radian (284x), 10mm Plössl (142X), 
22mm Nagler (64x)  
 
At 142x, close in magnitude the both stars appeared to have a pale yellowish-orange hue.