NGC 6355

{{Short description|Globular cluster in the constellation Ophiuchus}}

{{Infobox globular cluster

| name = NGC 6355

| image = NGC6355 - HST - Potw2301a.jpg

| caption = NGC 6355 seen by Hubble's ACS and WFC3.

| epoch = J2000

| pronounce =

| constellation = Ophiuchus

| ra = {{RA|17|23|58.6}}{{cite web|title=Object No. 1 - NGC 6355|url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+6355&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES|website=NASA/IPAC extragalactic database|publisher=NASA/IPAC|access-date=14 October 2015}}{{cite web|title=Revised NGC Data for NGC 6355|url=http://spider.seds.org/ngc/revngcic.cgi?NGC6355|website=Seds|access-date=14 October 2015}}

| dec = {{DEC|-26|21|12}}

| z =

| h_radial_v = {{val|-176.9|7.1|u=km/s}}

| gal_v =

| dist_pc = {{convert|8.54|+/-|0.19|kpc|kly|abbr=on|lk=on}}

| dist_ly =

| group_cluster =

| type =

| mass =

| mass_light_ratio =

| size =

| stars =

| age = 13.2 ± 1.1 Gyr{{cite journal|doi=10.1051/0004-6361/202245286 |title=Chrono-chemodynamical analysis of the globular cluster NGC 6355: Looking for the fundamental bricks of the Bulge |date=2023 |last1=Souza |first1=S. O. |last2=Ernandes |first2=H. |last3=Valentini |first3=M. |last4=Barbuy |first4=B. |last5=Chiappini |first5=C. |last6=Pérez-Villegas |first6=A. |last7=Ortolani |first7=S. |last8=Friaça |first8=A. C. S. |last9=Queiroz |first9=A. B. A. |last10=Bica |first10=E. |journal=Astronomy & Astrophysics |volume=671 |pages=A45 |bibcode=2023A&A...671A..45S | arxiv=2301.05227 }}

| metal_fe = −1.39 ± 0.08

| appmag_v = 8.6{{cite web|title=NGC 6355|url=http://spider.seds.org/spider/MWGC/n6355.html|website=Seds|access-date=14 October 2015}}

| absmag_v = -8.07

| size_v = 4.20

| notes =

| names = Cr 330, GCL 63 and ESO 519-SC15

| references =

}}

NGC 6355 is a globular cluster located in the constellation Ophiuchus.{{cite web|title=The globular cluster NGC 6355|url=https://in-the-sky.org/data/object.php?id=NGC6355|website=In-the-sky|access-date=31 October 2016}} It is at a distance of 28,000 light years away from Earth, and is currently part of the Galactic bulge.

NGC was discovered by the German-born British astronomer William Herschel on 24 May 1784.{{cite web|title=NGC 6355 (= GCL 63)|url=http://cseligman.com/text/atlas/ngc63a.htm#6355|website=cseligman|access-date=14 October 2015}} It was initially thought to be an open cluster, but its true nature as a globular cluster was later confirmed. It is a core-collapse cluster.