NGC 3191 explained

NGC 3191
Epoch:	J2000
Type:	SB(s)bc pec ^[1]
Dist Ly:	411 Mly (126 Mpc)
Z:	9182 ± 4 km/s
Appmag V:	13.2
Size V:	0.8 × 0.6
Constellation Name:	Ursa Major
Names:	NGC 3192, UGC 5565, MCG +08-19-018, PGC 30136

NGC 3191 (also known as NGC 3192) is a barred spiral galaxy in the constellation Ursa Major. It is located at a distance of about 400 million light years from Earth, which, given its apparent dimensions, means that NGC 3191 is about 115,000 light years across. The galaxy has been distorted and interacts with a companion 1.3 arcminutes to the west. An extremely blue tidal bridge lies between them.^[2] It was discovered by Gaia on 23 May 2017.

Supernova

Two supernovae have been observed in NGC 3191: SN 1988B and SN 2017egm. SN 1988B was discovered by P. Wild 10" north of the galaxy's center. On Jan. 18.94 and 21.85 UT, it was magnitude 15.5.^[3] It was a type Ia supernova.^[4] SN 2017egm is identified as a Type I superluminous supernova. It is the closest supernova of this type observed and also the first to be found in a massive spiral galaxy.^[5]

Notes and References

1. Web site: NASA/IPAC Extragalactic Database . Results for NGC 3191 . 2016-01-18 .
2. Takeuchi. Tsutomu T.. Tomita. Akihiko. Nakanishi. Kouichiro. Ishii. Takako T.. Iwata. Ikuru. Saito. Mamoru. Photometric Properties of Kiso Ultraviolet - Excess Galaxies in the Lynx - Ursa Major Region. The Astrophysical Journal Supplement Series. April 1999. 121. 2. 445–472. 10.1086/313203. astro-ph/9810161 . 1999ApJS..121..445T . 15506322.
3. Web site: IAUC 4533. Central Bureau for Astronomical Telegrams. 29 June 2017.
4. Web site: IAUC 4535. Central Bureau for Astronomical Telegrams. 29 June 2017.
5. Bose. Subhash. Dong. Subo. Pastorello. A.. Filippenko. Alexei V.. Kochanek. C. S.. Mauerhan. Jon. Romero-Canizales. C.. Brink. Thomas. Chen. Ping. Prieto. J. L.. Post. R.. Ashall. Christopher. Grupe. Dirk. Tomasella. L.. Benetti. Stefano. Shappee. B. J.. Stanek. K. Z.. Cai. Zheng. Falco. E.. Lundqvist. Peter. Mattila. Seppo. Mutel. Robert. Ochner. Paolo. Pooley. David. Stritzinger. M. D.. Villanueva Jr.. S.. Zheng. WeiKang. Beswick. R. J.. Brown. Peter J.. Cappellaro. E.. Davis. Scott. Fraser. Morgan. de Jaeger. Thomas. Elias-Rosa. N.. Gall. C.. Gaudi. B. Scott. Herczeg. Gregory J.. Hestenes. Julia. Holoien. T. W.-S.. Hosseinzadeh. Griffin. Hsiao. E. Y.. Hu. Shaoming. Jaejin. Shin. Jeffers. Ben. Koff. R. A.. Kumar. Sahana. Kurtenkov. Alexander. Lau. Marie Wingyee. Prentice. Simon. Reynolds. T.. Rudy. Richard J.. Shahbandeh. Melissa. Somero. Auni. Stassun. Keivan G.. Thompson. T. A.. Valenti. Stefano. Woo. Jong-Hak. Yunus. Sameen. Gaia17biu/SN 2017egm in NGC 3191: The closest hydrogen-poor superluminous supernova to date is in a "normal", massive, metal-rich spiral galaxy. The Astrophysical Journal. 2 August 2017. 853. 1. 57. 10.3847/1538-4357/aaa298. 2018ApJ...853...57B . 1708.00864. 54610579. 1538-4357. 6 . free .