NGC 7541
| Galaxy NGC 7541 / NGC 7581 |
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|---|---|
![NGC 7541, [1] imaged with a Hubble Space Telescope](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7a/NGC7541_-_HST_-_Potw2004a.tif/lossy-page1-300px-NGC7541_-_HST_-_Potw2004a.tif.jpg)
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| NGC 7541 as captured by the Hubble Space Telescope | |
| AladinLite | |
| Constellation | fishes |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 23 h 14 m 43.9 s |
| declination | + 04 ° 32 ′ 04 ″ |
| Appearance | |
| Morphological type | SB (rs) bc: / HII |
| Brightness (visual) | 11.7 mag |
| Brightness (B-band) | 12.4 mag |
| Angular expansion | 3.5 ′ × 1.2 ′ |
| Position angle | 102 ° |
| Surface brightness | 13.1 mag / arcmin² |
| Physical data | |
| Redshift | 0.008969 ± 0.000018 |
| Radial velocity | 2689 ± 5 km / s |
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Stroke distance v rad / H 0 |
(127 ± 9) · 10 6 ly (38.8 ± 2.7) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | August 30, 1785 |
| Catalog names | |
| NGC 7541 • NGC 7581 • UGC 12447 • PGC 70795 • CGCG 406-030 • MCG + 01-59-017 • IRAS 23121 + 0415 • 2MASX J23144385 + 0432020 • GC 4909 • H II 430 • h 2216 • HIPASS J2314 + 04 • KPG 578B • Stile 805A | |
NGC 7541 = NGC 7581 is a bar-spiral galaxy in the constellation Pisces on the ecliptic . It is estimated to be 127 million light years from the Milky Way and about 125,000 light years across. The galaxy has a high star formation rate in the region of 12 M ☉ / a and contains more than a dozen X-ray sources .
Together with NGC 7537 , it forms the isolated and gravitationally bound galaxy pair KPG 578 or Holm 805 .
The Type Ia supernova SN 1998dh was observed here, which is a relatively accurate distance estimate of 37.1 ± 1.5 million parsecs possible.
The object was discovered as a foggy object by Wilhelm Herschel with his 18.7-inch reflector telescope on August 30, 1785 and was later included in the New General Catalog by Johan Dreyer . Its entry NGC 7581 , which is based on an observation by Horace Tuttle in January 1875, may also go back to this galaxy.
literature
- Kaaret, Philip; Alonso-Herrero, Almudena (2008): X-Ray Sources in the Star-Forming Galaxies NGC 4194 and NGC 7541 ; The Astrophysical Journal 682 (2), pp. 1020-1028
