Delta Orion 

Bob Hogeveen
Star: Delta Orion 
Date & Time: November 18, 2000, 00:00 MET 
Seeing: --- <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> 
Conditions: Some clouds 
Temperature: 5ºC 
Binocular: Swift Supreme 10x50 (on tripod)
Delta Ori is a difficult double for bino's in the range of 10x50. The separation is large enough (52"), but the difference in magnitudes is great (2.2 - 6.3) which makes it hard to see the faint B next to the bright A. 
This time I didn't succeed in spotting B. 

I might be a combination of factors which are the reason for this : 
- My bino's are getting old 
- My eyes are getting older 
- Sky conditions was mediocre 

I don't know what it is, but 25 to 20 years ago I was able to split Delta with this same pair of bino's. So you can give it a try, with good bino's, good eyes and good conditions, Delta is within reach of 10x50 bino's. 


 
Tim Leese
Star: Delta Orion 
Date & Time: 20-November-2000 ( 23:30UT )
Seeing: 7-8 <1-10 Seeing Scale (10 best)> 
Location of site: Cheshire. UK
53° 15' N –2º 33' W 
Site classification: Suburban 
Sky darkness: 4 <Limiting magnitude>
Conditions: Very clear and still sky between clouds. 
Binoculars: 12X50 Olympus 5.3deg FOV
(hand held)
 

 

Leaning against the house wall to hold the binoculars steady I  could just make out the companion to Delta Ori (Mintaka). 

To me the faint companion seemed a blue colour against the glare of the blue/white 
primary star. 

 


 
Eddy O'Connor
Star: Delta Orion 
Date & Time: Dec 5th 2000. 10 -11p.m local; UT +11 
Seeing: 5-6 <1-10 Seeing Scale (10 best)>
Transparency: 6/10 
Temperature: 18ºC 
Other Conditions: Calm. Moon 9 days old 
Location of Site: Terara, New South Wales 
Australia,  S34.52, W150.38 degrees. 
Site Classification: Suburban 
Sky darkness: North 4; South 4.5 <Limiting magnitude> 
Binoculars: 7X35 Tento. 25X100 Somet. 
(Occasional 16" Dob comparisons ) 
HS: 2 
HS= Harshaw Scale1-5 (1 best) 
This is the most northerly mag. 2 star in Orion's belt and is a worthy binocular or small telescope object. In this triple system, a telescope reveals both a close faint 13.7 companion (not visible tonight) and a wider 6.3mag. companion at 53" separation. The primary had a creamy look tonight and the wide companion appeared a deep Blue colour. 

Comments: The field was surprisingly sparce adding to the contrast of this impressive double. Hartung suggests using this star because of it nearness to the celestial equator to determine the field diameter of oculars.[The time taken in seconds for the star to drift centrally across the FOV divided by 4 gives its diameter in minutes of arc] 
Useful. 
 
 
 

 


 
William L. Schart
Star: Delta Orion 
Date & Time:  1/5/01  8:30 - 8:45 pm CST 
8:30 -8:48 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: 4 <Limiting magnitude> 
Moon: waxing gibbous 
Binoculars: Tasco 10x50 binos 
A good clean split on this. The primary appeared W and the secondary B. 

 
Thad Robosson
Star: Delta Orion 
Date & Time: 1-17-01, 3:30 - 5:30 UT
Seeing: 4~5 <1-10 Seeing Scale (10 best)>
Weather: clear, but quite chilly at 45°F
(Hey, it's cold to us....)
Location of Site: Phoenix, AZ
112 08.029w, 33 32.674n
Site Classification: Suburban 
Sky darkness: -- <Limiting magnitude> 
Transparency: 3~4/10
Binoculars: 10x50 on homemade bino mount.
A bit tighter, I spent some time convincing myself I saw the comp.  Nearly PA of 0° and is slightly blue.  Main is white.

Ambiance: Not much. Traffic as background noise, all the animals were inside. No gunshots to report, but one ambulance.
 
 
 
 
 
 

 

 
 
Carol Locomiak
Star: Delta Orionis
Date & Time: UT Feb 14th, 01:00 till 04:00
Seeing: 7 <1-10 Seeing Scale (10 best)>
Transparency: Very good 8/10 
Temperature: 20°F 
Other Conditions: Slight breeze; no Moon
Location of Site: Tomahawk WI, USA
45ºN 89ºW
Site Classification:  Rural
Sky darkness: 8/10
Binoculars: Oberwerk 22x100
 
Sep. 52.60" // mags 2.25 and 6.6
Primary white, secondary was a very beautiful indigo/violet. This was the very first time I'd ever seen this color although I've read reports of others detecting the color. Very peaceful.
 
 

 
Paolo Morini
Star:Delta Ori
Date & Time: Nov 19, 2000, 21:40 UTC 
Seeing: --
Location of site: home, Ravenna, Italy
Site classification: Urban backyard 
Sky darkness: 4<Limiting magnitude> 
Conditions:--
Temperature: 8° C
Binocular: Canon IS 15x45

Very nice, one of my favourite binoculars split!