3C 9

{{Quasar

| name = 3C 9

| image =

| epoch = J2000

| ra = {{RA|00|20|25.22}}

| dec = {{DEC|+15|40|54.7}}

| constellation name = Pisces

| z = 2.0194
{{nowrap|240,526 km/s}}

| type = FR II RG
QSO

| dist_ly = 10 billion light-years
(light travel time){{cite web

|title=NASA/IPAC Extragalactic Database

|work=Results for 3C 009

|url=http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=3C+9&extend=no

|access-date=2010-04-20 }}
~17 billion light-years
(present comoving distance)

| appmag_v = 17.62

| size_v =

| notes =

| names = 2C 26, LEDA 2817473

}}

3C 9 is a lobe-dominated quasar{{cite simbad|title=3C 9|access-date=2019-11-20}}{{cite web

|date=2009-03-26

|title=3C 9

|publisher=XJET: X-Ray Emission from Extragalactic Radio Jets

|url=http://hea-www.harvard.edu/XJET/source-d.cgi?3C_9

|access-date=2010-04-06}} located in the constellation Pisces. This quasar is classified as radio loud with a jet.{{Cite journal |last1=Fabian |first1=A. C. |last2=Celotti |first2=A. |last3=Johnstone |first3=R. M. |date=2003-01-01 |title=Chandra reveals X-rays along the radio axis in the quasar 3C 9 at z= 2.012 |journal=Monthly Notices of the Royal Astronomical Society |volume=338 |issue=1 |pages=L7–L11 |doi=10.1046/j.1365-8711.2003.06111.x |doi-access=free |issn=0035-8711|arxiv=astro-ph/0204488 }}{{Cite journal |last1=Swarup |first1=G. |last2=Sinha |first2=R. P. |last3=Saikia |first3=D. J. |date=November 1982 |title=Extended radio jets in the high-redshift quasars 3C 9 and 280.1 |journal=Monthly Notices of the Royal Astronomical Society |volume=201 |issue=2 |pages=393–400 |doi=10.1093/mnras/201.2.393 |doi-access=free |issn=0035-8711|hdl=1887/6417 |hdl-access=free }} It has X-ray emission located primary on two sides of its nucleus, based on Chandra observations.

The host of 3C 9 is described as a ring-like galaxy undergoing a merger. The two nuclei of the merging galaxies are estimated to be 9 kiloparsecs apart.{{Cite journal |last1=Vayner |first1=Andrey |last2=Wright |first2=Shelley A. |last3=Murray |first3=Norman |last4=Armus |first4=Lee |last5=Boehle |first5=Anna |last6=Cosens |first6=Maren |last7=Larkin |first7=James E. |last8=Mieda |first8=Etsuko |last9=Walth |first9=Gregory |date=March 2021 |title=A Spatially Resolved Survey of Distant Quasar Host Galaxies. II. Photoionization and Kinematics of the ISM |journal=The Astrophysical Journal |language=en |volume=910 |issue=1 |pages=44 |doi=10.3847/1538-4357/abddc1 |doi-access=free |issn=0004-637X|arxiv=2101.08291 }}

In 1965, it was the most distant object discovered at the time of discovery. This was the first object found with a redshift in excess of 2.Time magazine, [https://web.archive.org/web/20080423044527/http://www.time.com/time/magazine/article/0,9171,898892,00.html The Quasi-Quasars], Friday, June 18, 1965