Struve 2459

Richard Harshaw 
Star: Struve 2459 
Date & Time: 6 July, 2001, 03:00 to 04:55, UT
Seeing: 8 <1-10 Seeing Scale (10 best)>. 
Transparency: 6-7/10 ,variable, due to high hazy clouds 
Location of site: Northern Kansas City, Missouri. 39º 15' N, 94º 30' W, 980 ft above Mean Sea Level
Site classification: Suburban
Sky darkness:  <Limiting magnitude>
Telescope: Celestron C-11
Eyepieces: 25mm Plossl 
Magnification: 112x		 Position:  1907+2558 
Magnitudes:  9.1 (A2), 9.9 (A2) 
Sep/PA's:   14= / 233= 
Year of this measurement:  1950 
Distance (light years):  355 
Luminosity (in suns):  3 
Eyepiece and magnification:  25mm Plossl (112x) 
Colors noted:  W, bW 

Comments:  A very nice 8m triangle lies ot the east.  Also, a nice but faint asterism lies 2' west. 
Hipparchos/Tycho data show different distances for these stars; they may be an optical system.  The stars have a small difference in proper motion. 
First measure:  13.7" @ 233. 
Rating:  3
 

 
Jim Jones 
Star: Struve 2459 
Date & Time: 07/08/01   0719 UTC
Seeing: 6 <1-10 Seeing Scale (10 best)>. 
Location of site: Lake Oswego, Oregon
Site classification: Suburban
Sky darkness: 5.0 <Limiting magnitude>
Sky: Near full moon in Capricornus
Telescope: 8 inch LX50 SCT
Eyepieces:  42mm Ultima, 18 mm Radian
Magnification: 47x, 112x		 Est PA without inst.....240d
No observable color
Very dim double set in NW corner of rough kite shaped  asterism made up of mag 11 stars. 

Three brighter stars make a triangle to East. The two brighter stars look as if they might be a double. Upon checking they are not listed in WDS. 

 

 
William Schart 
Star: Struve 2459 
Date & Time: 7/19/01  04:14 UT
Seeing: 7 <1-10 Seeing Scale (10 best)>. 
Location of site: Killeen, TX, USA
Site classification: Suburban
Sky darkness: 4 <Limiting magnitude>
Telescope: Celestar 8" SCT 
Eyepieces:  25mm, 17mm, and 10mm 
Magnification: 80x, 120x, and 200x 

Star: Struve 2459 
Date & Time: August 4, 2001, 9:25 to 10:12 pm CDT
Seeing: 7 <1-10 Seeing Scale (10 best)>
Location of site: Killeen, TX, USA
Site classification: 
Sky darkness: 3.5 <Limiting magnitude> 
Temperature: 89ºF (32ºC). 
Telescope: Celestar 8" SCT 
Eyepieces: 12.5 Microguide EP 
Magnification: 160x

 A fairly dim pair, both less than mag 9, but readily seen and split, even at low power. the bright one appeared to be distinctly blue to me but the dimmer companion was too faint for me to detect color.

I then spent a while cruising open and globular clusters in Scorpio and Sagitarius, which I will report on once I get them written up.
 
 
 
 
 
 
 

Since my observing site is right next to the west side of my garage, 
I can use it as an artificial horizon to block the moon once it's 
past full, at least early in the evening. I have made use of the 
strategy to re-visit some pairs in Lyra this weekend to make some 
measures.

This is our hottest time of year. Even this late at night (it is 
currently 11:00 pm), it is 89F (32C). Even without the moon, the sky 
is still pretty light - I suspect that this early is still in a 
twilight condition. However, with one exception, I was able to see 
all stars that I targeted clearly.

Sep: 11.3, PA 232.3 (ave 5 meas)
 

 
Tomás Vázquez 
Star: Struve 2459 
Date & Time: 12/05/2001. (TU): 01:22:51
Seeing: 4 <1-10 Seeing Scale (10 best)>. 
Location of site: Sevilla. Spain
37 24 N. 5 58 W
Site classification: Urban
Sky darkness: 3 <Limiting magnitude>
Telescope: C8. Reducer Focal: F/6,3
Eyepieces: CCD Camera
Magnification: n/a

 

 Observation: Camera CCD ST-4.
Time of Integration: 10 seconds.
Software Lectura CCD: LUCAS 1.1
Software Treatment: LAIA 3.2A
Position Image: North up, Este left.
Telescope Computer Interface: MICRO-GUIDER III.
Planetariun and Telescope Control Program: ECU. "Earth Cerntered Universe"

Description: The measures that I have carried out from the Amgle of Position and Separation to this double are the follwing:

AP: 232.47º D: 13.53"

Data Catalog WDS.
AR: 19h07m24.00s DE:+25°58'00.0"
STF2459
m: 9.10/ 9.80
1830: 13.7"/232°
1986: 13.8"/232°
Sp:A2 Np
DM:+25 3726
 

 
John M. Ryan 
Star: Struve 2459
Date & Time: 14 Aug, 2001 ( 22:45 UT)
Seeing: 6+ <1-10 Seeing Scale (10 best)>. 
Location of site: Barreras, Salamanca, Spain.
Site classification: Rural,Suburban
Conditions: no moon, fairly calm.
Sky darkness: : 5+. Much darker with the plastic curtains. <Limiting magnitude>
Telescope: Meade 8" SCt mounted on a Losmandy GM8 
Eyepieces: MX5-16 CCD camara.
Magnification: n/a		 Took three images and could see the double clearly in the center between a field of other stars. The results are as follows:

Doble            Epoch            PA           D
STF2459      2001.619      232.3º      13.81" 
CCD average of 3 images, average of O-C residuales = 0,16". The last WDS entry in 1986 for this double was PA = 232º and D = 13.8"

The O-C residuales refers to the difference between the observed positions compared to the calculated positions. 

 

 
Philippe Dejocas
Star: Struve 2459
Date & Time: August 8 2001 
Seeing: 7.5 <1-10 Seeing Scale (10 best)>
Location of site: Canada
Site classification: Suburban
Conditions: Clean skies and warm temperatures.
Sky darkness: 4.5 <Limiting magnitude> 
Telescope: 6inch/f5 newt
Magnification: 40x

 

 Easy at 40x. Quite a field with those 3 relatively bright stars in the W. I got the vague impression that this double was also part of, or in front of a faint op. cluster, or at least a greater concentration of 11 mag and fter. Stars. Ciel, with the pm indicator lines, suggests that his may be the case.
 
 
 
 

 

Back to the "33" Lyra listing


(c) 1998-2003 The Spirit of 33