Astronomy:NGC 5777
| NGC 5777 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Draco |
| Right ascension | 14h 51m 18s |
| Declination | +58° 58′ 40″ |
| Distance | ~114 million |
| Apparent magnitude (B) | 14.2 |
| Other designations | |
| UGC 9568, LEDA 53043, ISOSS J14513+5858 | |
NGC 5777 is a large edge-on spiral galaxy located in the constellation Draco.[1] Its speed relative to the cosmic microwave background is 2,210 ± 5 km/s, which corresponds to a Hubble distance of 32.6 ± 2.3 Mpc (~106 million ly). NGC 5777 was discovered by German-British astronomer William Herschel in 1789.[2]
The luminosity class of NGC 5777 is II and it has a broad HI line.[clarification needed] It is also an active galaxy with narrow optical emission lines.[3][failed verification] To date, nine non-redshift measurements yield a distance of 44.289 ± 8.577 Mpc (~144 million ly), which is just within the distance values of Hubble.
A spectrum obtained on July 10, 2001, by the Isaac Newton Telescope showed a type-IIp supernova at the center of NGC 5777.[4] SN 2001dc was formed from a group of low-luminosity events, among with other supernovae in the region. They contain narrow spectral lines (indicating low expansion velocities) and low luminosities at every phase, which is untypical for a supernovae.[5]
See also
- NGC 4565, a similar galaxy
- Sombrero Galaxy, another similar galaxy
External links
References
- ↑ "NGC 5777 - Spiral Galaxy in Draco | TheSkyLive.com". https://theskylive.com/sky/deepsky/ngc5777-object.
- ↑ Guide, Universe (2 July 2022). "NGC 5777 Galaxy Facts (UGC 9568) & Distance" (in en-us). https://www.universeguide.com/galaxy/ngc5777.
- ↑ Iovene, Salvatore. "NGC 5777" (in en). https://www.astrobin.com/110741/.
- ↑ Hurst, G. M.; Armstrong, M.; Meikle, P.; Bramich, D.; Corradi, R.; Erwin, P.; Boles, T.; Irwin, M. et al. (2001-07-01). "Supernova 2001dc in NGC 5777". International Astronomical Union Circular (7662): 1. ISSN 0081-0304. Bibcode: 2001IAUC.7662....1H. https://ui.adsabs.harvard.edu/abs/2001IAUC.7662....1H.
- ↑ Pastorello, A.; Zampieri, L.; Turatto, M.; Cappellaro, E.; Meikle, W. P. S.; Benetti, S.; Branch, D.; Baron, E. et al. (2004). "Low-luminosity Type II supernovae: spectroscopic and photometric evolution". Monthly Notices of the Royal Astronomical Society 347 (1): 74–94. doi:10.1111/j.1365-2966.2004.07173.x. Bibcode: 2004MNRAS.347...74P.
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