NGC 5641 explained

NGC 5641
Epoch:	J2000
Constellation Name:	Boötes
Z:	0.01440
Gal V:	^[1]
Dist Ly:	196 ± 14 Mly
Type:	(R')SAB(r)ab
Appmag V:	13.0
Absmag V:	-20.9
Size V:	2.4' x 1.1'

NGC 5641 is a type Sb-barred spiral galaxy in the constellation of Boötes, registered in New General Catalogue (NGC).^[2] It is located five degrees east of NGC 5466.^[3]

Observation history

NGC 5641 was discovered by Édouard Stephan on 4 June 1880. John Louis Emil Dreyer inside the New General Catalogue, described the galaxy as "pretty bright, pretty small, a little extended, much brighter middle, mottled but not resolved?"^[4] It was described in Burnham's Celestial Handbook as "pretty bright, pretty small, slightly elongated and much brighter in the middle".^[5] Walter Scott Houston also noted that this galaxy was missed by William Herschel. He wrote "although NGC 5641 is only 2' long, this should not have been a problem for Herschel observing at 157x."^[5]

Notes and References

1. Web site: Results for object NGC 5641 . NASA/IPAC Extragalactic Database . 15 August 2022 . https://web.archive.org/web/20221009124026/https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=38076&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1 . 9 October 2022.
2. Web site: NGC 5641. SIMBAD . 28 September 2022 . https://web.archive.org/web/20220928050001/http://simbad.cds.unistra.fr/simbad/sim-id?Ident=NGC+5641&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id . 28 September 2022.
3. Book: Gilmour, Jess K. . The Practical Astronomer's Deep-sky Companion . http://link.springer.com/10.1007/978-1-4471-0071-3_6 . Bootes . 2003 . Springer London . 978-1-85233-474-1 . London . 17 . 10.1007/978-1-4471-0071-3_6.
4. Web site: Seligman . Courtney . NGC 5641 (= PGC 51758) . Seligman website . 2 October 2022.
5. Web site: NGC 5641 . Deep Sky Observer's Companion – the online database . 2 October 2022 . https://web.archive.org/web/20160325155534/http://www.docdb.net/show_object.php?id=ngc_5641 . 25 March 2016.