NGC 3647

{{Short description|Elliptical galaxy in constellation Leo}}

{{Infobox galaxy|name=NGC 3647|image=File:NGC3647 - SDSS DR14.jpg|constellation name=Leo|z=0.04985 0.00001|dist_ly=747 Mly|size=72,000 ly|names=PGC 34816, 2MASX J11213813+0254119, Z 39-142, SDSS J112138+025411.4|type=E|h_radial_v=14,573 km/s|appmag_v=15.6}}

NGC 3647 is a small elliptical galaxy in the Leo constellation.{{Cite web |title=NGC 3647 - Elliptical Galaxy in Leo {{!}} TheSkyLive.com |url=https://theskylive.com/sky/deepsky/ngc3647-object |access-date=2024-04-16 |website=theskylive.com}} The galaxy was first discovered on March 22, 1865 by Albert Marth who was a German astronomer.{{Cite web |title=New General Catalog Objects: NGC 3600 - 3649 |url=https://cseligman.com/text/atlas/ngc36.htm |access-date=2024-04-16 |website=cseligman.com}} It is approximately 747 million light-years away.{{Cite web |title=Your NED Search Results |url=https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=26229&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1 |access-date=2024-04-16 |website=ned.ipac.caltech.edu}} Due to its close proximity to five other elliptical galaxies, there was a bit of confusion for Marth to identify which object is NGC 3647.

According to SIMBAD, it is identified as PGC 34816.{{Cite web |title=NGC 3647 |url=https://simbad.u-strasbg.fr/simbad/sim-basic |access-date=2024-04-16 |website=simbad.u-strasbg.fr}} But in HyperLeda and by NASA/IPAC databases, NGC 3647 is identified as PGC 34815. The correct designation for this article, according sources from wikidata is PGC 34816. There is no evidence whether this galaxy has an active nucleus or not.