Messier 74
Messier 74 (M74, NGC 628) sī chi̍t-ê gîn-hô, tī thian-kiû ê só͘-chāi sī Pisces-chō.
| Messier 74 | |
|---|---|
 The spiral galaxy, M74 (in the left bottom corner the supernova 2013ej) | |
| Observation data (J2000 epoch) | |
| Constellation | Pisces[1] |
| Right ascension | 01h 36m 41.8s[2] |
| Declination | +15° 47′ 01″[2] |
| Redshift | 657 km/s[2] |
| Distance | 30 ± 6 Mly[3] |
| Apparent magnitude (V) | 9.4[4] |
| Characteristics | |
| Type | SA(s)c[2] |
| Number of stars | 100 billion (1×1011) |
| Size | 95,000 ly (diameter)[5] |
| Apparent size (V) | 10′.5 × 9′.5[2] |
| Other designations | |
| NGC 628, UGC 1149, PGC 5974[2] | |
Tsù-kái
siu-kái- ↑ R. W. Sinnott, pian. (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation / Cambridge University Press. ISBN 978-0-933346-51-2.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "NASA/IPAC Extragalactic Database". Results for NGC 628. 2006-08-12 khòaⁿ--ê.[íng-íng bô-hāu ê liân-kiat]
- ↑ M. A. Hendry; S. J. Smartt; J. R. Maund; A. Pastorello; L. Zampieri; S. Benetti; et al. (2005). "A study of the Type II-P supernova 2003gd in M74". Monthly Notices of the Royal Astronomical Society. 359 (3): 906–926. arXiv:astro-ph/0501341
. Bibcode:2005MNRAS.359..906H.
- ↑ "Messier 74". SEDS Messier Catalog. goân-loē-iông tī 2023-06-27 hőng khó͘-pih. 30 April 2022 khòaⁿ--ê.
- ↑ "Messier Object 74".
Guā-pōo lên-ket
siu-kái- Pang-bô͘:WikiSky
- Spiral Galaxy M74 @ SEDS Messier pages
- Barrena, Rafael; Crowther, Paul. "M74 – Spiral Galaxy". Deep Sky Videos. Brady Haran.
- 3200萬光年外的「幻影」星系 NASA公布絢麗螺旋臂影像