NGC 2523

{{Infobox galaxy

| name = NGC 2523

| image = Noao-n2523block.jpg

| caption = NGC 2523 (left) next to NGC 2523B (right)

| epoch = J2000

| constellation name = Camelopardalis

| z = 0.011578 ± 4.00e-5

| dec = {{DEC|+73|34|44.167}}

| ra = {{RA|08|15|00.193}}

| dist_ly = {{convert|51.66 ± 3.62|Mpc|Mly|abbr=on|lk=on|order=flip}}

| group_cluster = NGC 2553 Group (LGG 154)

| appmag_v = 10.2

| type = SB(r)bc

| size = ~{{convert|36.79|kpc|ly|abbr=on|lk=on|order=flip}} (estimated)

| size_v = {{Val|2.818|×|1.778|u=arcminute}}

| notes =

| names = {{odlist | UGC= 4271 | Arp= 9 | CGCG= 331-032 | MCG= +12-08-031 | IRAS= 08092+7343 | PGC= 23128}}

}}

NGC 2523 is a barred spiral galaxy located around 168 million light-years away in the constellation Camelopardalis.{{Cite web | title=Results for object NGC 2523 | url=https://ned.ipac.caltech.edu/byname?objname=NGC+2523 | access-date=2024-03-13 | website=ned.ipac.caltech.edu}} NGC 2523 was discovered on 7 September 1885 by the American astronomer Edward Swift, and is approximately 120,000 light-years across.{{Cite web |title=NGC 2523 - Galaxy - SKY-MAP |url=http://www.wikisky.org/starview?object_type=2&object_id=1237 |access-date=2024-03-13 |website=www.wikisky.org}}{{cite web | url = https://cseligman.com/text/atlas/ngc25.htm#2523 | title = New General Catalogue Objects: NGC{{nbsp}}2523 | last = Seligman | first = Courtney | website = Celestial Atlas | access-date = 23 November 2024}} NGC 2523 does not have much star formation, and it does not have an active galactic nucleus.{{Cite web | title=NGC 2523 - Spiral Galaxy in Camelopardalis {{!}} TheSkyLive.com | url=https://theskylive.com/sky/deepsky/ngc2523-object | access-date=2024-03-15 | website=theskylive.com}}

NGC 2523 is one of several galaxies chosen by Halton Arp as an example of a spiral galaxy that has a separation of one of its arms. It is listed in Arp's Atlas of Peculiar Galaxies as Arp 9.{{cite journal | bibcode=1966ApJS...14....1A | title=Atlas of Peculiar Galaxies | last1=Arp | first1=Halton | journal=The Astrophysical Journal Supplement Series | date=1966 | volume=14 |page=1 | doi=10.1086/190147}}

NGC 2523 group

According to A.M. Garcia, NGC 2523 is the largest and brightest galaxy of the NGC 2523 Group (also known as LGG 154), which contains 5 galaxies, including NGC 2441, NGC 2550A, UGC 4041, and UGC 4199.{{cite journal | bibcode=1993A&AS..100...47G | title=General study of group membership. II. Determination of nearby groups | last1=Garcia | first1=A. M. | journal=Astronomy and Astrophysics Supplement Series | date=1993 | volume=100 | page=47}}

Supernova

One supernova has been observed in NGC 2523: SN{{nbsp}}2024aeee (type{{nbsp}}II, mag. 16) was discovered by Shinichi Ono on 17 December 2024.{{cite web | website=Transient Name Server | title=SN{{nbsp}}2024aeee | url=https://www.wis-tns.org/object/2024aeee | publisher = IAU | access-date=19 December 2024}}