Cordoba 31

 
Bob Hogeveen 
Star: Cordoba 31
Date & Time: January 4, 2003 (23.00) 
Seeing: 6  <1-10 Seeing Scale (10 best>
Transparency: 8 <1-10 Seeing Scale (10 best)>
Location of site: Annen, The Netherlands,
53N, 6E 
Site classification: Village backyard 
Conditions: No clouds, no wind, temp -7° C
Sky darkness:  5<Limiting magnitude> 
Moon: No
Telescope: C11 - 11" F/10 SCT, 
GS80 - 80mm f/6 refractor
Eyepieces: 40mm Pentax SMC XL,
30mm Ultima, 20mm TV plossl,
10mm plossl
Magnification: 16x (GS80 + 30mm), 
70x, 140x, 280x
Harshaw Scale: 3 <1-5; 1 best> 		 Interesting to be able to observe a double at 12° above the horizon, but nothing special noted about this one, sorry. Observed with the C11 @ 70x. 
 
 
 
 
 
 

 

 
Steve Bodin 
Star: Cordoba 31
Date & Time: 4 Jan 2003
8pm to 11:30 pm local
Seeing: 3  <1-10 Seeing Scale (10 best)>. 
Transparency: Fair
Location of site: Silverdale WA, USA
47N 123W
Site classification: suburb-rural
Conditions: warm for winter 40-45F, some light wind
Sky darkness: 5.6 <Limiting magnitude> 
Telescope: Celestron C8
Eyepieces: 24mm konig, 18 mm UO
Additional: PC164C video camera
Magnification: 80x, 111x, 333x video at pf, 1000x at 3x		 Difficult in this poor air; too far south. Primary looks white or yellow-white and secondary too faint to tell. Poor measure with video camera at prime focus; 17.17 sec at 284.1 deg PA.








 

 
Eddy O’Connor 
Star: Cordoba 31
Date & Time: January 7th 2003
9p.m -10.30p.m. local; UT +9
Seeing: 8 <1-10 Seeing Scale (10 best)>
Transparency:  6<1-10 Seeing Scale (10 best)>
Location of site: Terara, New South Wales, Australia
Long.150º.38 ; Dec. S 34º.52
Site classification: Suburban
Temperature. 23ºC 
Sky darkness:  <Limiting magnitude> 
Telescope: 16" Newt. F5.1
Eyepieces: 10mm Plossl, 18mm Ultima Celestron, 32 mm Teleview Plossl. 
Additional: 
Hershaw Scale: 1 <1-5 (1 best)>
   		 This star is southeast of the brighter Hers. 3750 and sits in a rich field.
 
Comments: The components are 7.4 and 9.7 and the separation, 17.4".This is a rich yellow primary and a Rose-tinted star lies north. Another nearby star SW in the field and wide doubles in the north and south make this a beautiful group. 
 
 
 
 
 

 
 
 
William L. Schart 
Star: Cordoba 31
Date & Time: 24, February, 2003
Seeing:  8 <1-10 Seeing Scale (10 best)>. 
Transparency: 
Location of site: Texas, USA
Site classification: Suburban
Sky darkness: 4 <Limiting magnitude> 
Telescope: C8
Eyepieces: 
Magnification: 		 A somewhate dim but wide pair, easily split. The primary is blue, the secondary to faint to tell. It points to a 4 star asterism which is a very stretched out diamond.
    
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