Struve 2848
Richard Harshaw 
Star: Struve 2848
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-8, C-11
Magnification: 65x, 112x
Harshaw Scale: 1 <1-5; 1 best>
HD Number 208718
ADS15493
Position:  2158+0556  Rating:  1
Components:
 A:  7.2m, A2m
 B:  7.8m, F2 V, 11 +” @ 55 
Year of last AB Measure:  1963
Distance (l.y.): 297, Luminosity (Suns): 14.5
Observed colors:  B, O 

Observations: C8: Observed at 65x. 
C11: Observed at 112x.  This time, both looked W to me, almost like distant headlights.  Nice effect!
10min to the ENE lies the pair Sh 336 (6" @ 225, 8m and 10m).  A 9m star lies another 90" or so from A, but is not part of Sh 336.
Webb saw them as W and yW or R.  "Colores indubii," he wrote.

Notes: Hipparchos/Tycho data show different distances for these stars; they may be an optical system.  The stars have different proper motions.
First measure (1829) by F. W. Struve:  10.4" @ 55.
 

 


 
Jim Jones
Star: Struve 2848
Date & Time: 09/07/01   0510UTC
Seeing: 5 <1-10 Seeing Scale (10 best)>
Location of site: Lake Oswego, Oregon
Site classification: Suburban
Sky darkness: 4.0 LM
Sky:  Full moon + 5 days.
Telescope: 8" LX50
Eye Pieces:  18mm Radian, 12.5mm CMG, 2x Ultima
Magnification: 112x, 160x, 224x, 360x
Est PA without inst.....060d
Color...blue-white
Measured PA and Sep based on the average of
5 CMG measurements with 2x barlow.
Measured PA...55.7d
Measured Sep....11.6"

Two widely spaced stars to the ENE turn out to be SHJ 336 AB (8.0, 8.9 mag, 85.3" sep, 223d PA). This double has a C component (SHJ 336 AC 7.9, 11.9 mag,
85.3" sep, 102d PA) that I didn't observe.  This might be a challenge for someone since it was last reported in 1908.
 
 
 

 


 
Jim Phillips
Star: Struve 2848
Date & Time: Oct. 8, 2001
Seeing: 6-7 <1-10 Seeing Scale (10 best)>
Transparency: 6 <1-10 Seeing Scale (10 best)>
Location of site: Hodges, South Carolina, USA
Site classification: Suburban
Sky darkness:  <Limiting magnitude>
Temperature: 45ºF
Telescope: Astrphysics 155 F/7 Apo
Magnification: 90x, 181x
White, white with a hint of blue. Nearly equal pair. Good at 90X and 181X.
 
 
 
 
 
 

 


 
Mary Flanagan
Star: Struve 2848
Date & Time: 12 Oct 2001 01:05 UT
Seeing: 8 <1-10 Seeing Scale (10 best)>
Transparency: 6 <1-10 Scale (10 best)>
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: 144x
Bright little pair looked pale blue and cream.
 
 
 
 
 
 
 
 
 
 

 


 
William Schart
Star: Struve 2848
Date & Time: 13 Oct 2001
9:20 - 10:45 pm CDT
Seeing: so-so
Location of site: Killeen, TX 
Site classification: Suburban 
Sky darkness: 4 <Limiting magnitude>
Telescope: 8" SCT 
Magnification: 80x, 200x, 165x (CMG)
Wide spac ed with one slightly dimmer than the other. Sep: 9.9, PA 55.8 (ave 5 meas).
 
 
 

 


 
Eddy O’connor
Star: Struve 2848
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: 1 <1-5, (1 best)>
 
Located close to 18 Peg near the eye of Pegasus.
 
Comments: This is a pretty pair of Bluish white stars. I detected a hint of Rose in the secondary. Another wide double in similar orientation NW of field make this a winning view at low power.
 

 

 
 
 
 
 
 

 

 
 
Dave Moore 
Star: Struve 2848
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
             
Split well at 67x. One star is brighter than the other. This is in the same field of view at 67x as the wide double SHJ 336, which I momentarily confused with Struve 2848. Upping the magnification to 160x reveals the two components of Struve 2848 to be pinkish-white and blue-white. This colour contrast is still visible when I dropped the magnification back to 67x.