{{Short description|Radio galaxy in the constellation of Boötes}} {{Infobox galaxy|name=[[Third Cambridge Catalogue of Radio Sources|3C]] 300|epoch=[[J2000.0]]|constellation name=[[Boötes]]|ra={{RA|14|23|01.00}}<ref name="ned" />|dec={{DEC|+19|35|17.98}}<ref name="ned" />|z=0.270000<ref name="ned" />|h_radial_v=80,944 [[kilometer per second|km/s]]<ref name="ned" />|dist_ly=3.243 [[light years|Gly]]|appmag_v=18.73|type=E;Radio galaxy HEG<ref name="ned" />|names=[[Fourth Cambridge Survey|4C]] +19.46, [[Parkes Catalogue of Radio Sources|PKS]] 1420+19, DA 366, OQ +134, NRAO 0443, TXS 1420+198, CoNFIG 192, Cul 1420+198<ref name="ned" />|image=File:Image of 3C 300.png|caption=[[Sloan Digital Sky Survey|SDSS]] image of 3C 300.}}

'''3C 300''' is a [[radio galaxy]]<ref>{{Cite journal |last1=Lilly |first1=S. J. |last2=McLean |first2=I. S. |last3=Longair |first3=M. S. |date=July 1984 |title=Surface photometry of powerful radio galaxies : their relation to Abell cluster cD galaxies. |url=https://articles.adsabs.harvard.edu/pdf/1984MNRAS.209..401L |journal=Monthly Notices of the Royal Astronomical Society |language=en |volume=209 |issue=3 |pages=401–413 |doi=10.1093/mnras/209.3.401 |doi-access=free |issn=0035-8711}}</ref> located in the constellation of [[Boötes]]. The [[redshift]] of the object is (z) 0.270<ref name="ned">{{Cite web |title=NED Search results for 3C 300 |url=https://ned.ipac.caltech.edu/byname?objname=3C+300&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1 |access-date=2025-09-21 |website=NASA/IPAC Extragalactic Database}}</ref> and it was first discovered as a [[Astronomical radio source|radio source]] in 1959.<ref>{{Cite journal |last1=Edge |first1=D. O. |last2=Shakeshaft |first2=J. R. |last3=McAdam |first3=W. B. |last4=Baldwin |first4=J. E. |last5=Archer |first5=S. |date=1959 |title=A survey of radio sources at a frequency of 159 Mc/s. |url=https://ui.adsabs.harvard.edu/abs/1959MmRAS..68...37E/abstract |journal=Memoirs of the Royal Astronomical Society |language=en |volume=68 |pages=37–60 |bibcode=1959MmRAS..68...37E }}</ref> It was subsequently identified with a galaxy counterpart in June 1966 and designated as '''4C 19.46''' by the [[Fourth Cambridge Survey]] in 1968.<ref>{{Cite journal |last=Véron |first=P. |date=June 1966 |title=Optical Positions for Radio Sources in the 3c Revised Catalogue |url=https://articles.adsabs.harvard.edu//full/1966ApJ...144..861V/0000863.000.html |journal=The Astrophysical Journal |language=en |volume=144 |pages=861 |doi=10.1086/148682 |bibcode=1966ApJ...144..861V |issn=0004-637X}}</ref><ref>{{Cite journal |last1=Williams |first1=P. J. S. |last2=Collins |first2=R. A. |last3=Caswell |first3=J. L. |last4=Holden |first4=D. J. |date=1968-04-01 |title=The Radio Spectra of Sources in the Fourth Cambridge Catalogue-III |url=https://watermark02.silverchair.com/mnras139-0289.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAA14wggNaBgkqhkiG9w0BBwagggNLMIIDRwIBADCCA0AGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQM8GB7c6wyNUcVsUPyAgEQgIIDEVlfP5_9iAhjBw4183fNX6glphlPHOhwe6POo5GZYP0qJG3cr94gggS38ZRReKFr6uyRioOGQPJSUuSKM_OYUkdCChxXjCZjMTfr4nuzCU47SoSOCTeMEmCvpVjfmO7-CnNBh_R18XlnTB9n1u6BvPi6anbUSt3ck2n_mPLSV10xCNNZnLAxwV9mhcMSjl6gXHom7koI0G8T4z4Ws0j5cGSRbTmOjcFCf3_rVxMBk0hksTUaJ9SVG2VLN8k7kq8azVJIA4ytI2Jj3XhcK4WP1NEoFOD6SEttQkA-T-n_UWMH_r-QPbz5vl942LfiDIa_K9ruA6tbAa3kjSMHQAondc129vPGZopMrqFXZ-5C8B3B3YzVCkzrfTiMmk6k6Zm9z81e_is-tzSGP72SoVe-75LPAtiyRmBcHx6UFn31rq1be7WflU4_duYSoN2g7DYR1QdRZemcqAlbThdeldsvx_54Pps5fnf5XRUyavlSs8VdedQYJB3HCFMCvjyE-XQMQlL7ytHJH1otERQn321fs9aTz8Y2HsC1Wg0UoXni7LDA7ST7mUYhYzQoTaqZOgSIub2Tfj2unRjnhGdso67FikvfciA7p3i3McH1j32ryKG8a4rL88ml4F1FUxUljt5I3Knq2CX_l4BKaZX2WLso2ofDvELYYUK5k88EoKdJFrpDN3t2o8jO11Mnx7i5QfgDenZwjWb9aNemt5PNJVT1E9I17UFZo_aKy9Kwzg_5wTjGzm1ZLl2TeRy8s2h7nm9Lc6X9qWQE1-ZbZv79SaWzFWmRV-wJXqy6SHAYhlGs988t35_jZu5X9Z4opWkXGF9RgLwrLsLV64G_jKok_yB99Pv8pYA-F_rKb4hcZ534WGc_shvhi5PO9p0qGUwo0LADHKhMGRnlfjSElClKpn5f_pvLImZnyFUbTLG0ScJ1abTM4u1kCBIiitWOOBKmgdGr1ennO4sIUIB9SkiX4D4v4yUtUm_iPj_RywYz5bIosrBDiggFzjEPiC2SPJUVUG_hyTHzcHxBnoIBVIkbUPOuGAXR |journal=Monthly Notices of the Royal Astronomical Society |volume=139 |issue=3 |pages=289–311 |doi=10.1093/mnras/139.3.289 |doi-access=free |issn=0035-8711}}</ref>

== Description == [[File:3C 300 VLT MUSE.jpg|left|thumb|VLT [[Multi-unit spectroscopic explorer|MUSE]] image of the EELR with oxgen in green and [[Hydrogen-alpha|H-alpha]] in orange.]] 3C 300 is a high-excitation [[Fanaroff–Riley classification|Fanaroff-Riley Class]] Type 2 radio galaxy,<ref>{{Cite journal |last1=Massaro |first1=F. |last2=Harris |first2=D. E. |last3=Tremblay |first3=G. R. |last4=Axon |first4=D. |last5=Baum |first5=S. A. |last6=Capetti |first6=A. |last7=Chiaberge |first7=M. |last8=Gilli |first8=R. |last9=Giovannini |first9=G. |last10=Grandi |first10=P. |last11=Macchetto |first11=F. D. |last12=O’Dea |first12=C. P. |last13=Risaliti |first13=G. |last14=Sparks |first14=W. |date=2010-04-13 |title=''CHANDRA''OBSERVATIONS OF 3C RADIO SOURCES WITH''z''&lt; 0.3: NUCLEI, DIFFUSE EMISSION, JETS, AND HOTSPOTS |url=https://doi.org/10.1088/0004-637x/714/1/589 |journal=The Astrophysical Journal |volume=714 |issue=1 |pages=589–604 |doi=10.1088/0004-637x/714/1/589 |arxiv=1003.2438 |bibcode=2010ApJ...714..589M |issn=0004-637X}}</ref> hosted by a compact [[elliptical galaxy]] that is located in a poor [[galaxy cluster]].<ref name=":0">{{Cite journal |last1=McCarthy |first1=Patrick J. |last2=Spinrad |first2=Hyron |last3=van Breugel |first3=Wil |date=July 1995 |title=Emission-Line Imaging of 3CR Radio Galaxies. I. Imaging Data |url=https://articles.adsabs.harvard.edu/pdf/1995ApJS...99...27M |journal=The Astrophysical Journal Supplement Series |language=en |volume=99 |pages=27 |doi=10.1086/192178 |bibcode=1995ApJS...99...27M |issn=0067-0049}}</ref><ref name=":1">{{Cite journal |last1=Floyd |first1=David J. E. |last2=Axon |first2=David |last3=Baum |first3=Stefi |last4=Capetti |first4=Alessandro |last5=Chiaberge |first5=Marco |last6=Macchetto |first6=Duccio |last7=Madrid |first7=Juan |last8=Miley |first8=George |last9=O'Dea |first9=Christopher P. |last10=Perlman |first10=Eric |last11=Quillen |first11=Alice |last12=Sparks |first12=William |last13=Tremblay |first13=Grant |date=July 2008 |title=Hubble Space Telescope Near-infrared Snapshot Survey of 3CR Radio Source Counterparts. II. An Atlas and Inventory of the Host Galaxies, Mergers, and Companions |journal=The Astrophysical Journal Supplement Series |language=en |volume=177 |issue=1 |pages=148–173 |doi=10.1086/587622 |arxiv=0712.0595 |bibcode=2008ApJS..177..148F |issn=0067-0049}}</ref> The appearance of the galaxy is described as highly elongated with faint tidal distortions, a boxy isophotal structure and an apparent [[Apparent magnitude|V magnitude]] of 19.0.<ref name=":1" /><ref>{{Cite journal |last1=Tremblay |first1=G. R. |last2=Chiaberge |first2=M. |last3=Donzelli |first3=C. J. |last4=Quillen |first4=A. C. |last5=Capetti |first5=A. |last6=Sparks |first6=W. B. |last7=Macchetto |first7=F. D. |date=September 2007 |title=Isophotal Structure and Dust Distribution in Radio-loud Elliptical Galaxies |journal=The Astrophysical Journal |language=en |volume=666 |issue=1 |pages=109–121 |doi=10.1086/520333 |arxiv=0705.3642 |bibcode=2007ApJ...666..109T |issn=0004-637X}}</ref><ref>{{Cite journal |last1=Taylor |first1=G. L. |last2=Dunlop |first2=J. S. |last3=Hughes |first3=D. H. |last4=Robson |first4=E. I. |date=December 1996 |title=A near-IR study of the host galaxies of radio-quiet quasars, radio-loud quasars and radio galaxies |url=https://watermark02.silverchair.com/283-3-930.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAA1owggNWBgkqhkiG9w0BBwagggNHMIIDQwIBADCCAzwGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMUYIWO70C7Ba1-xu9AgEQgIIDDZVtvL7IFeCfxLTjgs0vr_xmgij9yEoXQAMrTY9iBsvfGCshdJjSWd0BZPzxZ7Isa7fmXyN98vkiSCWr2VVQUYgUK1YtaZFhv8crX2_gAZUWkGYwgWOzM7eg7ZXcF41-zGCxARqs5Lgv3jGKrphigqTdI-gCxaM2_hrCaAIapHd7h0YRmU-xgMAE_edw9Mj6_fNJUNMC4WlcaoJ31Pi7PWxVHmKAweLBZePevjaxRD453mNkTcbaTr1isJSZrZ8iEC0r7zYIowJ7-lpa6QlSVpNdJQz38UXLaBwj3Kk7xBx6p0lsaZo89z6XT-249ZZvgnUIaiiIt23fp2ZGkGzV968E5OFOK9I04d3qVOTp-Tt9f8i0ZRTpXR1sN063IS9KOfg206yja9fBxa5HxVg9t24Z8ddtmKEwfZ3HhBHjH-ASoNUxjMkcHC09ie-SFaqsFtLJzhWHe0aEXoo8DsmrO9kOWn5S7LXm0mxBbiGx48rRszGqphqev-Bk75XHQfvssISDOR5NyPX2kCWQnAuiFwhl0rdi7I_CeAJKvBmEAwAMCX7qQPlPeEUyntYC5RlYRIYWENUObcq3PTYgdvDgSYwYNbQBcuw3L33rmY3oSjTXpZWBHrDE-Cih5blP-sjEZPGNHYZdM74KDbiwFRCeUWRrmV5Ie-me9jajGreyMbeZvxI-wgN87xxxodhHTczIgl_JLXlGr9zHHjM_BvieyDkxXQTtKGftgo_N9D9rLNdrd_0LorO6Q_L_qA1DxpMcSlxaRleAzva1BRf3aFjq6s5D1LAQnRAXE3F9o-qPv1zbMEVJXM4yY0NuQqiHNz7LZXk5gRrR-BA0bGf3WlrQzN9kfTNGm9hY0FsCuZ_2dp08MCELZFTsiBewr5yZ0NKGb0S_Q_FQooFVUKQo5yxwURggrA7Mhz-rua-djIPIkkEgBZwPC_e75sEoh9jxEPG2SjimvtuR_Mb6s-buFjmUqv846v-tIdzRR6M-Bz6xKRBaDhzEJuE5hbT8ja4X4w9Q9Jyxt4MYXUXvzRCd5uI |journal=Monthly Notices of the Royal Astronomical Society |language=en |volume=283 |issue=3 |pages=930–968 |doi=10.1093/mnras/283.3.930 |doi-access=free |issn=0035-8711}}</ref> A small companion galaxy is located 8.14 [[Minute and second of arc|arcseconds]] away in the west direction, shown to be heavily involved in the interaction and [[Galaxy merger|merging process]] with the galaxy.<ref>{{Cite journal |last1=Roche |first1=Nathan |last2=Eales |first2=Stephen A. |date=September 2000 |title=Optical/ultraviolet morphology and alignment of low-redshift radio galaxies |journal=Monthly Notices of the Royal Astronomical Society |volume=317 |issue=1 |pages=120–140 |doi=10.1046/j.1365-8711.2000.03684.x |bibcode=2000MNRAS.317..120R |doi-access=free |issn=0035-8711}}</ref> There are also high [[surface brightness]] regions in the galaxy along with a patch of [[Radio wave|radio emission]] located east from its extended nucleus.<ref name=":0" /><ref>{{Cite journal |last1=de Koff |first1=Sigrid |last2=Baum |first2=Stefi A. |last3=Sparks |first3=William B. |last4=Biretta |first4=John |last5=Golombek |first5=Daniel |last6=Macchetto |first6=Ferdinando |last7=McCarthy |first7=Patrick |last8=Miley |first8=George K. |date=December 1996 |title=HST Snapshot Survey of 3CR Radio Source Counterparts. I. Intermediate Redshifts |url=https://articles.adsabs.harvard.edu/pdf/1996ApJS..107..621D |journal=The Astrophysical Journal Supplement Series |language=en |volume=107 |issue=2 |pages=621–660 |doi=10.1086/192376 |bibcode=1996ApJS..107..621D |issn=0067-0049}}</ref> The total [[star formation]] of 3C 300 is 3.3<sup>+0.7</sup><sub>-0.7</sub> M<sub>☉</sub> per year, with a total [[infrared]] luminosity of 19.0<sup>+3.8</sup><sub>-4.1</sub> × 10<sup>9</sup> [[Solar luminosity|L<sub>☉</sub>]].<ref name=":2">{{Cite journal |last1=Westhues |first1=Christian |last2=Haas |first2=Martin |last3=Barthel |first3=Peter |last4=Wilkes |first4=Belinda J. |last5=Willner |first5=S. P. |last6=Kuraszkiewicz |first6=Joanna |last7=Podigachoski |first7=Pece |last8=Leipski |first8=Christian |last9=Meisenheimer |first9=Klaus |last10=Siebenmorgen |first10=Ralf |last11=Chini |first11=Rolf |date=May 2016 |title=Star Formation in 3CR Radio Galaxies and Quasars at z &lt; 1 |journal=The Astronomical Journal |language=en |volume=151 |issue=5 |pages=120 |doi=10.3847/0004-6256/151/5/120 |arxiv=1602.07443 |bibcode=2016AJ....151..120W |doi-access=free |issn=0004-6256}}</ref>

The [[extended emission-line region]] (EELR) of 3C 300,<ref>{{Cite journal |last1=Balmaverde |first1=B. |last2=Capetti |first2=A. |last3=Baldi |first3=R. D. |last4=Baum |first4=S. |last5=Chiaberge |first5=M. |last6=Gilli |first6=R. |last7=Jimenez-Gallardo |first7=A. |last8=Marconi |first8=A. |last9=Massaro |first9=F. |last10=Meyer |first10=E. |last11=O’Dea |first11=C. |last12=Speranza |first12=G. |last13=Torresi |first13=E. |last14=Venturi |first14=G. |date=2022-06-01 |title=The MURALES survey - VI. Properties and origin of the extended line emission structures in radio galaxies |url=https://www.aanda.org/articles/aa/abs/2022/06/aa42823-21/aa42823-21.html |journal=Astronomy & Astrophysics |language=en |volume=662 |pages=A23 |doi=10.1051/0004-6361/202142823 |arxiv=2204.00528 |bibcode=2022A&A...662A..23B |issn=0004-6361}}</ref> has an S-shaped morphology with a total extent of 60 kiloparsecs in east to west direction and displaying [[rotation]] that is well-ordered along the position of its major radio [[Axial tilt|axis]]. Diffused emission is seen on the north and west side of the region.<ref>{{Cite journal |last1=Balmaverde |first1=B. |last2=Capetti |first2=A. |last3=Marconi |first3=A. |last4=Venturi |first4=G. |last5=Chiaberge |first5=M. |last6=Baldi |first6=R. D. |last7=Baum |first7=S. |last8=Gilli |first8=R. |last9=Grandi |first9=P. |last10=Meyer |first10=E. T. |last11=Miley |first11=G. |last12=O’Dea |first12=C. |last13=Sparks |first13=W. |last14=Torresi |first14=E. |last15=Tremblay |first15=G. |date=2021-01-01 |title=The MURALES survey - III. Completing the MUSE observations of 37 3C low-z radio galaxies |url=https://www.aanda.org/articles/aa/abs/2021/01/aa39062-20/aa39062-20.html |journal=Astronomy & Astrophysics |language=en |volume=645 |pages=A12 |doi=10.1051/0004-6361/202039062 |arxiv=2010.11195 |bibcode=2021A&A...645A..12B |issn=0004-6361}}</ref> Nuclear outflows are evident, with the outflow being mainly influenced by a blue component whose maximum [[velocity]] peaks at 2160 kilometers per seconds.<ref>{{Cite journal |last1=Speranza |first1=G. |last2=Balmaverde |first2=B. |last3=Capetti |first3=A. |last4=Massaro |first4=F. |last5=Tremblay |first5=G. |last6=Marconi |first6=A. |last7=Venturi |first7=G. |last8=Chiaberge |first8=M. |last9=Baldi |first9=R. D. |last10=Baum |first10=S. |last11=Grandi |first11=P. |last12=Meyer |first12=E. T. |last13=O’Dea |first13=C. |last14=Sparks |first14=W. |last15=Terrazas |first15=B. A. |date=2021-09-01 |title=The MURALES survey - IV. Searching for nuclear outflows in 3C radio galaxies at z < 0.3 with MUSE observations |url=https://www.aanda.org/articles/aa/abs/2021/09/aa40686-21/aa40686-21.html |journal=Astronomy & Astrophysics |language=en |volume=653 |pages=A150 |doi=10.1051/0004-6361/202140686 |arxiv=2106.09743 |bibcode=2021A&A...653A.150S |issn=0004-6361}}</ref>

The radio source of 3C 300 is classified as a double, based on observations made by J.M. Riley and G.G. Pooley using the Cambridge 50-km Telescope in 1975.<ref>{{Cite journal |last1=Riley |first1=J. M. |last2=Pooley |first2=G. G. |date=1975 |title=Observations of 31 extragalactic radio sources with the Cambridge 50-km telescope at 5 GHz |url=https://articles.adsabs.harvard.edu/pdf/1975MmRAS..80..105R |journal=Memoirs of the Royal Astronomical Society |language=en |volume=80 |pages=105 |bibcode=1975MmRAS..80..105R }}</ref> When observed on a radio map, the source contains multiple components with a total [[Spectral index|spectra index]] value of 0.83 ± 0.10.<ref>{{Cite journal |last=Burch |first=S. F. |date=1979-03-01 |title=Multifrequency studies of seven 3CR radio sources - II. Results and interpretation |url=https://watermark02.silverchair.com/mnras186-0519.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAA14wggNaBgkqhkiG9w0BBwagggNLMIIDRwIBADCCA0AGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMJFyIYTfumdMyfA-kAgEQgIIDESDNmyD8S0_6-O6HmvzF7hY1KYDxVd1GpnrQkBecExpNWGhNC3noKY2sm8jOucAwawiXiJrfw6VjKI4tGrhYmtCoof6FTTAxkvFy1HqHHMqtURhabwye4yc0LpgOmFLKTzEVeWfCJEQqvMxNG2fsRjtAajTLyd1mfe8k-W8PyogaXEbEnB_XEAE3M729vRfzmQ4HL6axNl1rFNv-p086izon70A_4fcz9RTa-Y7MCPggQV8nz-0eJ38-sdgK18Qao_JlnX6hvhr-zDZEpIVIHixqUKjmP4tC9xbRNo5Tdi2SJPreTHTa9Du4P0ZUiCzp6C2xi40EUnM1RrzEhDk2XB7eWLGP0eo5DsmaLOhJkH7VTk1R-4Z8eM0Ix9Ic1iinr85knhalsN5QCcKDGzLpDdlR6QSIVjlJh_2SONPxz3XjXsVwv6GLtBT0ngeX_5UiAJBC0mJrtHgzAGkqXEvzvXiV408oCvVZXzyZNw1A9YIMx9Vjz7D5L1RifLBNIJyVSfnrwsw1OjV_nIXWigaAyH6xBeiJv0GzdkP36XekU-L7ldHB_cbt8YpQTZ7D664cLBQXOQNlKsPljDCDGjFpyfenzsP8LHc5nR2Cdn9sDSSTTxbWoxYY1wSOCGXBXAVLuK6O-ISNxrPyJQdIYZd4BiGJ_swN_BhX_fsNZyVYv5TvnZQczQBmQ462qLTtqZhHVxfcj5-8sdk_2JjOzS6WkHAsHnmy35tCdgBxUSQCxcUSg4yFlX5jmBFC7oIkaRtLbMCeNCBHSLyQ7y4nnLa7DFqvL1SfsXOTAbfDVnZPjSG0ytAExv3NxtAcniYjA2p_rHT2kondy1Q74o-CKT7pjcCcuv9OZ_zlzxOp53wzsJr3MhPXtRrqJ54x4IzWRa-KcfWbXVp77TC5QqPBl_MWCqkjPjlSp8Tzo_mUVUyMgvUprswJozkk-iCcY_T_Nnb8JvZFFcR_ydrbyYQRa3CVVH79zurZ62KXUcXc5F1RtXg1gqjb8LH-QWvmbE9KprIdI_9YPG6ofnqmdApARgnjuRPo |journal=Monthly Notices of the Royal Astronomical Society |volume=186 |issue=3 |pages=519–553 |doi=10.1093/mnras/186.3.519 |doi-access=free |issn=0035-8711}}</ref> High resolution imaging made by the [[Very Long Baseline Array]] (VLA) would paint a different picture for the source, describing it as asymmetrical with a hotspot located in the eastern direction. When further imaged, the hotspot has a double structure with an elongated component at its western edge and a brighter component that is being extended back towards the radio core position. Two other components are located inside a high surface brightness area.<ref name=":3">{{Cite journal |last1=Hardcastle |first1=M. J. |last2=Alexander |first2=P. |last3=Pooley |first3=G. G. |last4=Riley |first4=J. M. |date=July 1997 |title=High-resolution observations at 3.6cm of seventeen FRII radio galaxies with 0.15&lt;z&lt;0.30 |url=https://articles.adsabs.harvard.edu/pdf/1997MNRAS.288..859H |journal=Monthly Notices of the Royal Astronomical Society |language=en |volume=288 |issue=4 |pages=859–890 |doi=10.1093/mnras/288.4.859 |doi-access=free |issn=0035-8711}}</ref> The northern [[Radio galaxy|radio lobe]] of 3C 300 displays a high speed of 0.026 ± 0.045c, compared to its shorter southern radio lobe. This implies the northern radio lobe is residing within a low external [[Density|gas density]] area.<ref>{{Cite journal |last1=Harwood |first1=Jeremy J. |last2=Hardcastle |first2=Martin J. |last3=Croston |first3=Judith H. |last4=Goodger |first4=Joanna L. |date=2013-09-12 |title=Spectral ageing in the lobes of FR-II radio galaxies: new methods of analysis for broad-band radio data |journal=Monthly Notices of the Royal Astronomical Society |volume=435 |issue=4 |pages=3353–3375 |doi=10.1093/mnras/stt1526 |doi-access=free |issn=1365-2966|arxiv=1308.4137 }}</ref>

A [[Astrophysical jet|jet]] is present inside the western radio lobe of 3C 300, from the core to the terminating point of the hotspot region. This jet might also be bent too, given the change of [[angle]] between 10° and 15°.<ref name=":3" /> An observation made in 1998 found the jet is straight with a [[flux]] density of 8.06 [[Hertz|GHz]] and has a length of 4.70 kiloparsecs.<ref>{{Cite journal |last1=Hardcastle |first1=M. J. |last2=Alexander |first2=P. |last3=Pooley |first3=G. G. |last4=Riley |first4=J. M. |date=May 1998 |title=FRII radio galaxies with z&lt;0.3 - I. Properties of jets, cores and hotspots |url=https://watermark02.silverchair.com/296-2-445.pdf?token=AQECAHi208BE49Ooan9kkhW_Ercy7Dm3ZL_9Cf3qfKAc485ysgAAA2IwggNeBgkqhkiG9w0BBwagggNPMIIDSwIBADCCA0QGCSqGSIb3DQEHATAeBglghkgBZQMEAS4wEQQMbbh8RjeMi81W0X9LAgEQgIIDFXM-hJ0sp-1l72sZ09YhvIvL7KfsgJ_sF6FaVm-DjSZkhQAGdbhISjieimMeTUray2KVOS5TkT7wLA5dVsV2ek3D2bbEUfLcfU1_FE8CAJrliuwMsS4F0SPf355DoIKZ-Btj_1KnXS9LE1Mls6C0Kkvb02oAjNHlnwXfp_ALD9yWtsoMb4HetqAbTDFHP_rI-CDqHVvEGmzRhTE4o9ER0ZCFy5S_FxtBth1r9msecFGjSUlNKNPbdSOc5ztM-s0HyhYQT82QThDI7eiJh2I-kB4zJ1AsIj8ERcjIz60kg4W6njVV1nB2Ji6rhrkPQ665CtB_dP8grkS-zPLBtCGgBhYk6TRYTpvtigQSQ5unhkF-wFeq3YPY71QsTFxKGKfrB6XcjuQ-VYUReru5TRHr-skzZfuLP7-2rHksVZ-kaVIbpDy3hBYKTTXwjxjbcUc_JzMlh5nu2xMejkQPwErFTSxwPcvr1c0WjJQBRdTPQYhFdwk_mnpeCY1ys6FfSxjP0oKG9Np5GVKwA7nq3PFgsidMgeqahSqCV2tBGVbvl7UVnUBtc4k8gab3eEjR-Hqs-KKLM-U44PmeHXChXrZDN5J8CgTTwB1CEHlm7dV5oQSPFRyEfFBpiV1b9gU7yyX0zGXiuyoPbQH5uE0nSVov9SSoS7AkPnXSY3mznasVGduwse-i7oSNa_SdINNuTe-wpl6RZptP_idGJKM1is1z31F12zFecWzD7B_BG2LpaiZxJKTHqmjLIZ4KhPbOFZNgkcgPzyZnsbK37LOIU9b4bBXyipkQxB_ia-oVpn81blhoZ38LjBd1iVBT-HmrE7uV2ke5BYy61vHQZBT3hjZwib5SkI_fP8lG2jysi1S0tv585936SKooGq7DnSZ-RTtBw3VxGgBgtFSykC_0TArkWk-ayV0Pu5JDOz-e3gxvP6CpTpPFkNW7h48_3K3nVxKgJhWxUNMuvt9bC357bECxDLEnpZF2K-mwPIN7DZiuydY85Mjzck3LI19F74NKmXrei855vYZPUGvJCRIcKLu2AUDnEKiSRA |journal=Monthly Notices of the Royal Astronomical Society |language=en |volume=296 |issue=2 |pages=445–462 |doi=10.1046/j.1365-8711.1998.01480.x |arxiv=astro-ph/9801179 |bibcode=1998MNRAS.296..445H |doi-access=free |issn=0035-8711}}</ref> A [[supermassive black hole]] mass of 12.7<sup>+5.6</sup><sub>-5.0</sub> × 10<sup>7</sup> M<sub>☉</sub> has been estimated for the galaxy.<ref name=":2" />

== References == <references />

== External links == *{{WikiSky}} *[http://simbad.u-strasbg.fr/simbad/sim-id?bibyear1=1850&bibyear2=%24currentYear&submit=Display&Ident=%402252761&Name=3C+300&bibdisplay=refsum&bibyear1=1850&bibyear2=%24currentYear#lab_bib 3C 300 on SIMBAD]

[[Category:Radio galaxies]] [[Category:Boötes]] [[Category:Active galaxies]] [[Category:3C objects|300]] [[Category:4C objects|+19.46]] [[Category:Elliptical galaxies]] [[Category:Interacting galaxies]] [[Category:Astronomical objects discovered in 1959]]

{{Boötes}}