IC 2560

{{Short description|Spiral galaxy in the constellation Antlia}}

{{Sky|10|16|18.666|-|33|33|49.85}}

{{Infobox galaxy

| name = IC 2560

| image = A spiral in the Air Pump.jpg

| caption = IC 2560's spiral arms and barred structure imaged by the Hubble Space Telescope

| epoch = J2000

| constellation name = Antlia

| ra = {{RA|10|16|18.666}}{{cite web|title=Search Results for IC 2560|url=http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=IC+2560|work=Astronomical Database|publisher=SIMBAD|access-date=6 September 2013}}

| dec = {{DEC|-33|33|49.85}}

| z = 0.0096

| h_radial_v = 2864 km/s

| gal_v =

| dist_ly = 110 million ly{{cite news|title=A spiral in the Air Pump|url=http://www.spacetelescope.org/images/potw1335a/|access-date=6 September 2013|newspaper=ESA/Hubble Picture of the Week}}

| group_cluster =

| type = (R')SB(r)b?

| mass =

| mass_light_ratio =

| stars =

| appmag_v = 13.31

| appmag_b = 12.53

| absmag_v =

| size_v = {{Val|3.2|×|2.0|u=arcminute}}{{r|ned}}

| size = ~{{convert|45.69|kpc|ly|abbr=on|lk=on|order=flip}} (estimated){{cite web

| website = NASA/IPAC Extragalactic Database

| publisher = NASA and Caltech

| title = Results for object IC 2560

| url = https://ned.ipac.caltech.edu/byname?objname=IC+2560

| access-date = 9 June 2025}}

| notes =

| names = {{odlist | IRAS= 10140-3318 | PGC= 29993 | name= ESO 375- G 004 | 2MASX= J10161866-3333498 | MCG= -05-25-001}}

| references =

}}

IC 2560 is a spiral galaxy lying over 110 million light-years away from Earth in the constellation of Antlia. It was discovered by Lewis Swift on 28 December 1897.{{Cite web |title=Index Catalog Objects: IC 2550 - 2599 |url=https://cseligman.com/text/atlas/ic25a.htm#ic2560 |access-date=2024-07-23 |website=cseligman.com}}{{cite journal|bibcode=1898AN....147..209S |title=Catalogue No. 11 of Nebulae |last1=Swift |first1=L. |journal=Astronomische Nachrichten |date=1898 |volume=147 |issue=13 |page=209 |doi=10.1002/asna.18981471302 }}

The luminosity class of IC 2560 is II{{Cite book |last1=de Vaucouleurs |first1=Gerard |url=https://ui.adsabs.harvard.edu/abs/1991rc3..book.....D |title=Third Reference Catalogue of Bright Galaxies |last2=de Vaucouleurs |first2=Antoinette |last3=Corwin |first3=Herold G., Jr. |last4=Buta |first4=Ronald J. |last5=Paturel |first5=Georges |last6=Fouque |first6=Pascal |date=1991-01-01|bibcode=1991rc3..book.....D }} with a broad HI line{{Cite journal |last1=Mathewson |first1=D. S. |last2=Ford |first2=V. L. |date=1996-11-01 |title=Parameters of 2447 Southern Spiral Galaxies for Use in the Tully-Fisher Relation |url=https://ui.adsabs.harvard.edu/abs/1996ApJS..107...97M |journal=The Astrophysical Journal Supplement Series |volume=107 |pages=97 |doi=10.1086/192356 |bibcode=1996ApJS..107...97M |issn=0067-0049}} containing regions of ionized hydrogen. Moreover, IC 2560 is an active Type 2 Seyfert Galaxy.{{Cite journal |last1=Véron-Cetty |first1=M. -P. |last2=Véron |first2=P. |date=2006-08-01 |title=A catalogue of quasars and active nuclei: 12th edition |url=https://ui.adsabs.harvard.edu/abs/2006A&A...455..773V |journal=Astronomy and Astrophysics |volume=455 |issue=2 |pages=773–777 |doi=10.1051/0004-6361:20065177 |bibcode=2006A&A...455..773V |issn=0004-6361}} It has a distinct bar structure in the center with the supermassive black hole at the core having a mass of {{Val|4.4e6|4.4|2.2|ul=solar mass}}.

One supernova has been observed in IC 2560. SN 2020ejm (type Ia, mag. 16) was discovered by the Distance Less Than 40 Mpc Survey (DLT40) on 11 March 2020.{{cite web | website=Transient Name Server | title=SN{{nbsp}}2020ejm | url=https://www.wis-tns.org/object/2020ejm | publisher = IAU | access-date=9 June 2025}}