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NGC7331
Spiral Galaxy
| Right Ascension | 22h 37m 05s | Best Seen | 8/15-1/15 |
| Declination | 34° 24' 56" | Magnitude | 9.5 |
| Constellation | Pegasus | ||
Actual |
Compared to Milky Way |
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| Distance | 50 million ly | -- |
| Actual Brightness | 50 billion suns | -- |
| Diameter | 30,000 ly | 0.3 |
| Mass | 200 billion suns | -- |
| Galactic Type | Sb | Sbc |
What To Look For Through The Telescope
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Recommended eyepiece: 40 mm.
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When people look through the telescope they should see a fuzzy patch of light. This is the galaxy. If they are having trouble seeing it, have them look at a star near the edge of the field, then look back to the center out of the corner of their eye.
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The view through the telescope will not look like photographs of galaxies they may have seen. A photograph of a galaxy may have an exposure of may hours. This long exposure brings out the spiral arms and other details. Our eyes allow the light to collect for only about 1/30 of a second before they refresh themselves and start over again.
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This particular galaxy is bright, compact, and nearly circular.
NGC7331 Information
- This galaxy was first discovered by William Herschel in 1784. (William Herschel is most famous for discovering the planet Uranus.)
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References
| Item | Updated | Notes |
| Coordinates | 2003-01-16 | tweaked with SIMBAD and SEDs |
| Distance | 2003-01-16 | OK with http://www.noao.edu/outreach/aop/observers/n7331.html and http://messier.seds.org/xtra/ngc/n7331.html |
| Actual Brightness | 2003-01-16 | can find no support |
| Diameter | 2003-01-16 | previousl: 100-150 thousand l.y. – BUT not according to NOAO http://www.noao.edu/outreach/aop/observers/n7331.html |
| Mass | 2003-01-16 | can find no support |
| Galactic Type | 2003-01-16 | OK with SEDs site |
| Other Information | 2003-01-16 | from SEDs site |