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Stephan's Quintet

Stephan's Quintet

Drawing data

Object(s):
NGC 7317 Peg GX
NGC 7318 A-B Peg GX
NGC 7319 Peg GX
NGC 7320 Peg GX
Date(s) of observation:
2013.07.07/08. Ágasvár
2013.07.09/10. Ágasvár
2013.07.10/11. Ágasvár
2013.07.11/12. Ágasvár
Place(s) of observation:
Ágasvár
Telescope(s) used:
16" f/4.4 Newtonian (MCSE Dobson)
Enlargement(s) used:
176x (10mm Delos)
220x (8mm Planetary)
Author / Observer:
Peter Kiss

Description

Stephan's quintet drawing inverted into positive.
Stephan's Quintet drawing inverted into positive.

The Stephan's Quintet was the first object I saw in a large Dobsonian. This I thank to Gáspár Bakos whom I approached in the 1995 MCSE camp in Ráktanya with my wish to take a look at the Stephan's Quintet in Gábor Szitkay's 17.5" Odyssey 2. Gáspár was very kind and showed me the galaxies provided that I take a proper look at them - I was very happy to hear this condition. I was 14 at that time.

I managed to draw this famous system many years later during the 2013 Ágasvár astro-week. The five little galaxies near NGC 7331 are an obvious sight, they are around 14.0mg. But to see those few details - it's a real challange. I could see the most details in the two brightest components, NGC 7318 A and B. Their asymmetrical shapes in the drawing can be linked to the entangled spiral arms visible in the photos. I could see one foreground star and one spot on the surface of the foreground galaxy NGC 7320. The spot was probably only a foreground star as well. The core region of NGC 7319 lies a little offset form the center. There is a sixth galaxy belonging to the system, NGC 7320 C (16.7mg) which I didn't see, though I tried hard.

Legend: NGC numbers of the galaxies of the Stephan's quintet.
Legend: NGC numbers of the galaxies of the Stephan's Quintet.

In September 2014 we took a look at the Stephan's Quintet in Jörg Peters' 24" Dobsonian at the 30. ITT held at Emberger Alm, Austria. It was a breathtaking sight. NGC 7320 was full of bright spots and the very faint galaxy NGC 7320 C was easily visible. I didn't make a drawing that time.

Comparison with the photograph

Stephan's Quintet drawing using a 16
Stephan's Quintet drawing using a 16" Newtonian telescope. Peter Kiss
Stephan's Quintet. Composite image from multiple data sources: Amateur data by Robert Gendler, Hubble Legacy Archive (processed by Judy Schmidt), 8.2 meter Subaru Telescope (NAOJ). Image assembly and processing: Robert Gendler and Judy Schmidt.
Stephan's Quintet. Composite image from multiple data sources: Amateur data by Robert Gendler, Hubble Legacy Archive data (processed by Judy Schmidt) and 8.2 meter Subaru Telescope (NAOJ) data. Image assembly and processing: Robert Gendler and Judy Schmidt. Copyright Robert Gendler, Source: robgendlerastropics.com

The photo on the left, courtesy of Robert Gendler was created by Robert Gendler and Judy Schmidt using Hubble Legacy Archive data (processed by Judy Schmidt), 8.2 meter Subaru Telescope (NAOJ) data and amateur data by Robert Gendler. Image assembly and processing was done by Robert Gendler and Judy Schmidt. The original photograph has been cropped and my inverted drawing rotated to show a similar area of the sky. It is worth taking a look at the original image as well because it features the faint sixth galaxy belonging to the system as well. My drawing shows a smaller area of the sky. The position of the 6th galaxy lies outside my field.

By comparing the photo and the drawing it is obvious that I wasn't even really scratching the surface. I didn't see too much of the system's beauty. The interesting details, that is the irregular, entangled spiral arms and the patches of young, hot and blue stars were invisible in the 16" Newtonian telescope.

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