12 Scorpius 

Pino Bandini
Star: 12 Scorpius 
Location of site: Ravenna, Italy 
Date of observations (UT): 19 June 2000 – 22.04 UTC 
Site classification: Urban 
Sky conditions
Seeing: 7 (10 best) 
Temperature: 20 C 
Limiting visual magnitude: -- 
Telescope: Celestron C8 
Magnification: 81x (eyepiece 25 mm Plossl) + diagonal 
 
 
Notes: very low in the sky 
 
 
 
 
Richard Harshaw
Star: 12 Scorpius 
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): July 22, 2000; 0230 hours 
Site classification: suburban 
Sky conditions
Seeing--  8 out of 10 
Transparency-- 8  out of 10 
Limiting visual magnitude-- 4.5 
Telescope: Celestron C-8 
Eyepiece: 7.4mm Erfle, 280x, with mask 
 
 
Magnitudes: 5.9 (B9V), 7.9 
Sep/PA's: 4" / 75 (-) 
Year of last measurement: 1975 
Distance (light years): 298 
Luminosity (in suns): 36 
Eyepiece and magnification: 7.4mm Erfle, 280x, with mask 
Colors noted: O and W?? 
This pair is a member of the Sco OB2 Association. 

 
 

 
 

 
 
Eddy O'Connor
Star: 12 Scorpius
Date & Time: July 24th 2000, 10 p.m local; UT +10
Seeing: 6 <1-10 Seeing Scale (10 best)> 
Transparency: 8/10
Temperature: 15oC. Dew
Location of Site: Terara, New South Wales, Australia, Long.150.38 degrees; 
South 34.52. 
Site Classification: Suburban 
Sky darkness: 5.5 <Limiting magnitude> 
Instrument: 8" F9 Dobsonian
Magnification: 144x
 
12 Scorpio: This was a return after a much better earlier visit. This star is the faintest in a recognisable group of six stars within the Antares binocular field. It was a Light Blue star and just split at low power but a wipe out at X144.