Struve 2799

Richard Harshaw 
Star: Struve 2799
Date & Time: September 5, 2001,
0230 to 0510 UT
Seeing: 6 <1-10 Seeing Scale (10 best)>
Transparncy: 6 to 7 (variable, due to high hazy clouds) <1-10 Seeing Scale (10 best)>
Location of site: Northern Kansas City,
Missouri (USA). 39º15' N, 94º30'W
980 ft above Mean Sea Level
Site classification: suburban 
Sky darkness: -- <Limiting magnitude>
Telescope: Celestron C-8m C-11
Magnification: 560x
Harshaw Scale: 3 <1-5; 1 best>
HD Number 204509
ADS 15007
Position:  2129+1105  Rating:  3
Components:
 A:  6.7m, F4 II
 B:  7.5m, 1.7 +” @ 267 - 
 C:  9.3m, 136” @ 336 
Year of last AB Measure:  1991
Distance (l.y.): 412, Luminosity (Suns): 44
Observed colors:  Y, B, ?

Observations: Observed at 560x.  I noted them as yW, W and L or B (uncertain).  Very nice field.
"Beautiful," wrote Webb.

Notes: Popovic (1986) gives the orbital period as 618.89 years.
First measure 1.4" @ 323.  1911 (Greenwich Observatory), PA 291.
 

 


 
Mary Flanagan
Star: Struve 2799
Date & Time: 26 Sep 2001 02:08 UTC;
Seeing: 5 <1-10 Seeing Scale (10 best)>
Transparency: 5
Location of site: Apple Valley MN, USA
93d 14m 25s W; 44d 45m 17s N
Site classification: Suburban 
Sky darkness: 3 <Limiting magnitude>
Telescope: 12.5" f/5 Dobsonian 
Magnification: 106x, 144x
106x, 144x. Got the C component; no color noted. No luck on B. 144x was pretty useless.

 
William Schart
Star: Struve 2799
Date & Time: 9/29/01
from 8:12 to 9:15 pm CDT
Seeing: 6 <1-10 Seeing Scale (10 best)>
Transparncy:  <1-10 Seeing Scale (10 best)>
Location of site: Killeen, TX, USA
Site classification: Suburban
Sky darkness: 3.5 <Limiting magnitude>
Telescope: Celestron C8
Magnification: 80x, 160x (CMG), 200x
A triple system. The primary was elongated at low power, at high power it was difficult to get a split because of the poor seeing, but occasionally I was able to detect a sliver of black. This pair was cream colored. The third member was far off from the primary pair. Separation: 136.2, PA 330.9.
 
 
 
 
 
 
 

 


 
Jim Phillips
Star: Struve 2799
Date & Time: Sept. 29, 2001
Seeing: 6-7 <1-10 Seeing Scale (10 best)>
Location of site: Hodges, South Carolina, USA
Site classification: Suburban.
Temperature: 54ºF
Sky darkness: --- <Limiting magnitude>
Telescope: AP 155 F/7 Apochromat
Magnification: ---
White, White with 12mm Nagler and 2X Barlow. Distant 3rd Bluish.

 
Bob Hogeveen
Star: Struve 2799
Date & Time: October 8, 2001 
Seeing: Varying from 3 to 5 <1-10 Seeing Scale (10 best)>
Transparncy: 7 to 8 <1-10 Seeing Scale (10 best)>
Location of site: Annen, The Netherlands (53N, 6E)
Site classification: Village backyard 
Sky darkness: ~5 <Limiting magnitude>
Telescope: Celestron C11 
Magnification: 97x, 187x, 280x 
Harshaw Scale: 3 <1-5; 1 best> 
Of this triple with a tight AB and a distant C the AB-pair was seen with 97x as a horizontal fuzzy, yellowish 8. Checking others observation I agree with William as he calls it cream colored. C doesn't really add to the view. With 136" it's far of and could as well be a fieldstar, it's color is undistinguisable, greyish.
The bad seeing didn't permit a good view of AB at 187x, stars were split but unsharp and smeared out. 
 
 
 
 
 
 
 

 


 
Eddy O’connor
Star: Struve 2799
Date & Time: October 14th  2001
8-9.30 p.m local; UT +9
Seeing: 7 <1-10 Seeing Scale (10 best)>
Transparency: 8 <1-10 Seeing Scale (10 best)>
Location of site: Terara, New South Wales, Australia
34º52S, 150º.38E
Site classification: Suburban - Rural
Temperature: 18ºC
Sky darkness: 5 - 5.5, No Moon <Limiting magnitude>
Telescope: 8" Newt. F9
Eyepieces: 25mm K, 12.5 mm Ortho
Magnification: 73x, 146x
Harshaw Scale: 2 <1-5, (1 best)>
    
This star is just south of 2797 and is found in a rich field of stars.
 
Comments: Elongation was noticed at X72 abd neatly split at X174. The third mag. 9.7 star was clearly seen in the NW, while a miniature isosceles triangle of equal magnitude fainter stars enhanced the SE field.
 

 

 
 
Dave Moore 
Star: Struve 2799
Date & Time: 21st October 2001
19.55-22.00 BST 
Seeing: 3 <1-10 Seeing Scale (10 best)>
Transparency: 7 <1-10 Seeing Scale (10 best)>
Location of site: Charminster, Bournemouth, Dorset
51ºN, 1ºW
Site classification: Suburban
Sky darkness: 4.3 <Limiting magnitude>
Moon: 4 Days Old, but below horizon
Bootle Scale: 8 (Suburban/Urban)
Telescope: 8" Meade LX-90 SCT f/10 (Lucy)
Eyepieces: 30mm Celestron Ultima (67x), 
26mm Meade Super Plossl (77x), 
12.5mm Celestron Ultima (160x), 
2x Barlow
Magnification used: 67x, 160x, 320x
         
An interesting system. At 67x, the brightest star in the system is elongated, and is accompanied by a very faint and wide companion star. Upping the magnification to 160x splits the bright star into a figure-of -eight. There is a good colour contrast here. One star is blue-white and the other has an orange-tinge. The whole system fits 
nicely into the FoV at 320x, where the brighter star is now cleanly split, but the colours are now off-white and blue-white.