NGC 673

{{Short description|Galaxy in the constellation Aries}}

{{Use dmy dates|date=November 2024}}

{{Sky|01|48|22.4795|+|11|31|17.323}}

{{Infobox Galaxy

| name = NGC{{nbsp}}673

| image = NGC673 - SDSS DR14.jpg

| caption = NGC{{nbsp}}673 imaged by SDSS

| constellation name = Aries

| epoch = J2000

| type = SAB(s)c{{Cite web |title=Results for object NGC 673 |url=http://ned.ipac.caltech.edu/byname?objname=NGC+673 |access-date=14 November 2024 |website=NASA/IPAC Extragalactic Database |publisher=NASA and Caltech}}

| ra = {{RA|01|48|22.4795}}

| dec = {{DEC|+11|31|17.323}}

| dist_ly = {{convert|72.18 ± 5.06|Mpc|Mly|abbr=on|lk=on|order=flip}}

| group_cluster = NGC 673 Group (LGG 31)

| z = 0.017289

| h_radial_v = 5183 ± 1 km/s

| appmag_v = 12.6

| size_v = {{Val|2.1|×|1.7|u=arcminute}}

| size = ~{{convert|42.27|kpc|ly|abbr=on|lk=on|order=flip}} (estimated)

| names = {{odlist | UGC= 1259 | MCG= +02-05-033 | CGCG= 437-030 | PGC= 6624 | IRAS= 01457+1116 | 2MASX= J01482246+1131176}}

}}

NGC{{nbsp}}673 is an intermediate spiral galaxy in the constellation of Aries. Its velocity with respect to the cosmic microwave background is 4894 ± 20{{nbsp}}km/s, which corresponds to a Hubble distance of {{convert|72.18 ± 5.06|Mpc|Mly|abbr=on|lk=on|order=flip}}. In addition, 31 non redshift measurements give a closer distance of {{convert|63.187 ± 1.699|Mpc|Mly|abbr=on|order=flip}}.{{Cite web |title=Distance Results for NGC{{nbsp}}673 |url=https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+673 |access-date=14 November 2024 |website=NASA/IPAC EXTRAGALACTIC DATABASE |publisher=NASA}} The galaxy was discovered by German-British astronomer William Herschel on 4 September 1786.{{Cite web |last=Seligman |first=Courtney |title=NGC{{nbsp}}673 |url=https://cseligman.com/text/atlas/ngc6a.htm#673 |access-date=14 November 2024 |website=Celestial Atlas}}

According to A.M. Garcia, NGC 673 is the namesake of the NGC 673 Group (also known as LGG 31). This group contains at least 17 galaxies, including IC 156, IC 162, NGC 665, NGC 677, NGC 683, and 11 galaxies from the UGC catalogue.{{Cite journal |last=Garcia |first=A. M. |date=1993 |title=General study of group membership. II. Determination of nearby groups |journal=Astronomy and Astrophysics Supplement Series |volume=100 |page=47 |bibcode=1993A&AS..100...47G}}