Theta1 + Theta2 Orion 

Jim Jones
Star: Theta1 + Theta2 in Orion 
Date & Time: 07:30 UTC, 11/17/00
Seeing: 6 <1-10 Seeing Scale (10 best)>
Location of site: Lake Oswego, Oregon 
Site classification: Suburban
Sky darkness: 3.5 <Limiting magnitude> 
Temp:  36F 
Wind:  Brisk and cold. 
Binocular: 7x50 Nikon (hand held)


Est PA......290d 
Some luminosity observed. 
A very cold night seemed to make Orion's sword appear very cold indeed. 


Bob Hogeveen
Star: Theta1 + Theta2 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)


A wide pair of bright young stars. Beautiful becouse they are embedded in the glow of M42. With 10x it can be detected that Theta-1 (The Trapezium) is more than one star, but separation is not possible. 

Their position in one of the most beautiful and interesting starfield in our sky, Orion's sword, makes this a real showstopper. In the same FOV we see, beside the nebulous glow of M42, several other doubles : 
Theta-2, a double itself. 
42+45 Ori, a very wide pair to the north of M42 and the most attractive one : 
Stuve 747, a nice little double near Iota Ori (south of M42). 


Eddy O'Connor
Star: Theta1 + Theta2 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: 1++ 
HS= Harshaw Scale1-5 (1 best) 
Now we are the heart of the sword and what a stunning piece of cosmic drama, whatever the ocular. For this one I kept switching between the 16" Dob and the 25X100 Binocs and was enthralled by the field in both. Even the field in the 7X35 had its own charm and added perspective to the central action. The sheer size and brightness impresses in a light-bucket but the total effect to me is superior in the wide angle view of the 25X100. 

Here we see the entire belt laid out like an underground cave of jewels, with the 
skeins and wreaths of white silk-like star-cloud glowing at its centre. This bino double is the dynamic centre. Comments: The 7X25 show the wide White 4.9 and 5 mag. pair well but the larger binocs grasp the third close star in the trapezium. 


William L. Schart
Star: Theta1 + Theta2 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 
theta 2 was cleanly split. Theta 1 I could resolve 2 stars - perhaps A-D. A goodly extent of the nebula could be seen. 

Ambience: It being near full moon, I decided to do some bino observing with my newly made parallelogram mount. Orion was in a good position, so I looked at some of the well known pairs there and along the way discovered an optical double. I also had a look at the open cluster NGC 1981, where I could see 7 stars clearly. 

It has gotten fairly warm the last few days (highs in the 60's F) and I suspect that is was still in the upper 50's, with little if any wind. The Christmas lights which were troublesome last month are a thing of the past. No animals accompanied me tonight. 

Thad Robosson
Star: Theta1 + Theta2 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. 
Both white, PA of 135° 


Luis Argüelles
Star: Theta1 + Theta2 Orion 
Date & Time: 23rd, January, 2000, 21:50 UT
Site of Observation: Oviedo, Spain
Site Clasification: Urban
Seeing: 2-3 <1-10 Seeing Scale (10 best)>
Sky darkness: About 3 <Limiting magnitude> 
Transparency: 6 
Temperature: About 18ºC 
Conditions: Rather strong wind
Binoculars: Pentax PCF-V 8x40, handheld
Observing from the kitchen of my flat is very comfortable, but without doubts, not the best place to try high-magnification. A quick observation with binoculars is a good paliative instead. 

Probably, the location of these stars are from the easier ones in all the entire sky and while is really easy to observe Theta1+Theta2 as two different groups, I'm not able to split any component there. 

Comparatively, 42+45 Ori are brighter than these ones, but the 6.2º field of view gathers a very nice observation.

Carol Locomiak
Star: Theta1 + Theta2 Orion 
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
Stars A and C were definitely split, and were separate from B and D. Stars B and D appeared oval with intermittent grey between them. All appeared white in color.

Paolo Morini

Star:Theta1 + Theta2 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> 
Temperature: 8° C
Binocular: Canon IS 15x45

Very easy