| Pino Bandini | ||||
| Star: Argelander 39 (Arg 39)
Location of site: Ravenna, Italy Date of observations (UT): 09/07/2000 – 21.34 UT Site classification: Urban Sky conditions: Seeing: 9 (10 best) Temperature: 24C Limiting visual magnitude: -- Telescope: Celestron C8 Magnification: 81x (plossl 25 mm) |
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| Ilario Melandri | ||||
| Star:
Argelander 39 (Arg 39)
Date & Time: 10/07/2000 – 01.34 UT Seeing: 4 <1-10 Seeing Scale (10 best)> Location of site: Italy, Ravenna, San Romualdo, Lat 44 32’N Lon 12 08’E Elevation: 0 m Site classification: Rural Sky darkness: 5 <Limiting magnitude> Temperature: 15C Telescope: 150 mm f/15 achromatic refractor (lens by Romano Zen, Venice). Magnification: 140 x (eyepiece Clave Plossl 16 mm) |
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| Richard Harshaw | ||||
| Star: Argelander 39 (Arg 39)
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): 03:30 on 24 July, 2000 Site classification: suburban Sky conditions: Seeing-- 6 out of 10, but highly variable Transparency-- 8 out of 10 Limiting visual magnitude-- 4.8 Telescope: Celestron C-8 Eyepiece: MicroGuide, 166x, with mask |
Magnitudes: 8.7 (K5), 9.3
Sep/PA's: 12.2" / 176+ Year of last measurement: 1994 First measurement: 9.6" / 110. 1979: 10" / 157. Distance (light years): 259 Luminosity (suns): 2.7 Eyepiece and magnification: MicroGuide, 166x, with mask Colors: O and O. The separation and PA of this pair did not look quite right visually so I decided to check it with the MicroGuide. I obtained 13.5" / 183, so it is still widening and moving retrograde.
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| John M. Ryan | ||||
| Star:
Argelander 39 (Arg 39)
Date of Observation: 8/08/00 22UT Location of Observation: Ciudad Rodrigo, Salamanca, Spain 40º 36' N, 6º 32'W, Elev. 800 Meters Seeing: 5 to 6 (1 - 10, 10 best) Transparency: 7 Limiting Mag. (naked eye): 3.5 Site classification: Urban Instrument: Meade 8"SCT Magnification: 100X (20mm plossl) and 400X (Microguide with 2.5 powermate) |
I was eager to measure this with the Microguide especially after Richard
Harshaw's report and diagram that showed that this double was widening
in just a few short years.
I arrived at a measurement of 13.3 arc secs and a PA of 178º taking an average of five measurements. In 1994 the measurement was 12.2 arc secs and a PA of 176º. Richards results were 13.5 arc secs and a PA of 183º. Richard and I are almost right on with the separation but our PA angles are off by 6º. Being that our separations are almost equal I think that my PA angle may be a little low. I hope to measure this again in the near future hopefully on a night of better seeing. This double looks like it would be interesting to follow up because it seems to be moving much faster than the average double.
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| Jim Jones | ||||
| Star:
Argelander 39 (Arg 39)
Date & Time: 0520 UTC, September 7, 2000 Seeing: 7 <1-10 Seeing Scale (10 best)> Location of site: Lake Oswego, Oregon, USA Site classification: Suburban Sky darkness: 4.0 <Limiting magnitude> Telescope: 8 inch LX50 SCT Eye Piece(s): 26mm Meade 4000 Magnification: 78x |
I had tried Arg 39 on several different occations using
the analog setting circles on my LX 50. On each occasion, I carefully
searched the area without finding the double. I knew that this double couldn't
be that hard, but I just couldn't find it. Last night I made one final
attempt and failed. Then I noticed that I had tranposed the RA of
Arg 39 from
20:42 to 20:24. After that the rest was simple. AAARG!!! Est. PA without insturmentation 170d Equal in brightness, equal in color. Both yellow-orange.
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