| 词条 | NGC 5640 |
| 释义 |
| name = NGC 5640 | image = NGC 5640 2MASS.jpg | caption = NGC 5640 (2MASS) | epoch = J2000.0 | constellation name = Camelopardalis | ra = {{RA|14|20|40.81}} | dec = {{DEC|+80|07|23.20}} | z = 0.047386 | h_radial_v = {{nowrap|14206 ± 35 km/s}} | dist_ly = 660 Mly | appmag_b = 15.60 [6] | appmag_v = 14.70 [6] | type = Sa [6] | size_v = 0.9 x 0.4 [6] | names = PGC 51263, CGCG 353.35 }}NGC 5640 is a spiral galaxy approximately 660 million light-years away from Earth in the constellation of Camelopardalis. It was discovered by British astronomer William Herschel on December 20, 1797.[11] Supernova SN 1996ahSupernova SN 1996ah was discovered in NGC 5640 on June 6, 1996 by J. Mueller, who was using the 1.2-m Oschin Schmidt telescope in the course of the second Palomar Sky Survey. [12] SN 1996ah had magnitude about 18 and was located southwest of the centre of NGC 5640 (coordinates: RA 14h20m39.020s, DEC +80d07m21.00s, J2000.0).[12] It was classified as type Ia supernova. See also
External links
References1. ^1 2 3 4 {{cite web|title=Revised NGC Data for NGC 5640|url=http://spider.seds.org/ngc/revngcic.cgi?NGC5640|website=spider.seds.org|accessdate=December 3, 2017}} [1][2][3]2. ^1 2 {{cite web|title=Central Bureau for Astronomical Telegrams|url=http://www.cbat.eps.harvard.edu/iauc/06400/06421.html#Item1|website=www.cbat.eps.harvard.edu|accessdate=December 3, 2017}} 3. ^1 {{cite web|title=Data for NGC 5640|url=http://www.astronomy-mall.com/Adventures.In.Deep.Space/NGC%205000%20-%205999%20(11-30-17).htm|website=www.astronomy-mall.com|accessdate=December 9, 2017}} }}{{galaxy-stub}} 6 : Spiral galaxies|Camelopardalis (constellation)|NGC objects|Principal Galaxies Catalogue objects|Astronomical objects discovered in 1797|Discoveries by William Herschel |
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