# 4C 73.08

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Radio galaxy in the constellation Draco

4C 73.08 HST image of 4C 73.08. Also in the image are galaxies; LEDA 2754266 & LEDA 2754392 Observation data (J2000 epoch) Constellation Draco Right ascension 09h 49m 45.94s[1] Declination +73° 14′ 23.00″[1] Redshift 0.047280[1] Heliocentric radial velocity 14,174 ± 878 km/s[1] Distance 689.6 ± 7,681.0 Mly (211.44 ± 2,355 Mpc)[1] magnitude (J) 12.95[1] Characteristics Type FR II NLRG[1] Size ~170,000 ly (52.0 kpc) (estimated)[1] Other designations 2MASX J09494596+7314232, PGC 28261, VII Zw 292, 8C 0944+734, PBC J0950.0+7315, IVS B0945+734[1]

**4C 73.08** is a [Fanaroff-Riley](/source/Fanaroff%E2%80%93Riley_classification) Class Type II [radio galaxy](/source/Radio_galaxy)[2] located in the constellation of [Draco](/source/Draco_(constellation)). The [redshift](/source/Redshift) of the galaxy is (z) 0.047[1] and it was first discovered by U. Stute in 1981.[3] This object has also been said to be classified as a giant radio galaxy. It is also the [brightest cluster galaxy](/source/Brightest_cluster_galaxy) of a small [galaxy group](/source/Galaxy_group).[4][5]

## Description

4C 73.08 is hosted by an [elliptical galaxy](/source/Elliptical_galaxy).[2] When observed, the radio source of the galaxy is found compact, with known protrusion features extending outwards from both of the [radio lobes](/source/Radio_galaxy). The lobes are also connected together by bridges of [radio emission](/source/Radio_wave). There are also strong detections of radio [polarization](/source/Polarization_(waves)) located at both north and south protrusion extensions of the lobes.[4] The total [linear extent](/source/Linear_extension) of the source is estimated to be 1.7 [megaparsecs](/source/Parsec).[6] A compact radio core is clearly detected based on radio imaging.[7]

New radio observations in 2013 would find 4C 73.08 has a double-lobed structure that is found to contain several components. The hotspot located in the southern component is the brightest known feature while the hotspot in the northern lobe is fainter and also located centrally. Wing-like features are also exhibited by both lobes with ridgelines running in [perpendicular](/source/Perpendicular) [direction](/source/Direction_finding) towards the position of the [major axis](/source/Semi-major_and_semi-minor_axes) and curving away from the nucleus's direction. The radio core contains a flat [radio spectrum](/source/Radio_spectrum).[8]

A [radio jet](/source/Astrophysical_jet) initially thought as one-sided, is shown to have a symmetrical appearance.[8] The lobes of the source are surrounded by radio emission on [megaparsec](/source/Parsec) scales.[9] Studies also found 4C 73.08 is classified as a narrow-line radio galaxy.[10]

## References

1. ^ [***a***](#cite_ref-ned_1-0) [***b***](#cite_ref-ned_1-1) [***c***](#cite_ref-ned_1-2) [***d***](#cite_ref-ned_1-3) [***e***](#cite_ref-ned_1-4) [***f***](#cite_ref-ned_1-5) [***g***](#cite_ref-ned_1-6) [***h***](#cite_ref-ned_1-7) [***i***](#cite_ref-ned_1-8) [***j***](#cite_ref-ned_1-9) ["NED Search results for 4C 73.08"](https://ned.ipac.caltech.edu/byname?objname=4C+73.08&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1). *NASA/IPAC Extragalactic Database*. Retrieved 2026-03-29.

1. ^ [***a***](#cite_ref-:0_2-0) [***b***](#cite_ref-:0_2-1) information@eso.org. ["Galactic fireflies"](https://www.esahubble.org/images/potw1246a/). *www.esahubble.org*. Retrieved 2026-03-29.

1. **[^](#cite_ref-3)** Stute, U. (1981). ["Die große Radiogalaxie 4C73.08"](https://articles.adsabs.harvard.edu/full/1981MitAG..52..150S). *Mitteilungen der Astronomischen Gesellschaft Hamburg*. **52**: 150. [Bibcode](/source/Bibcode_(identifier)):[1981MitAG..52..150S](https://ui.adsabs.harvard.edu/abs/1981MitAG..52..150S). [ISSN](/source/ISSN_(identifier)) [0374-1958](https://search.worldcat.org/issn/0374-1958).

1. ^ [***a***](#cite_ref-:1_4-0) [***b***](#cite_ref-:1_4-1) Klein, U.; Mack, K. H.; Strom, R.; Wielebinski, R.; Achatz, U. (March 1994). ["A high-frequency radio continuum investigation of giant radio galaxies. I. Observations of six objects at 2.8 CM wavelength"](https://articles.adsabs.harvard.edu/pdf/1994A%26A...283..729K). *Astronomy and Astrophysics*. **283**: 729–744. [Bibcode](/source/Bibcode_(identifier)):[1994A&A...283..729K](https://ui.adsabs.harvard.edu/abs/1994A&A...283..729K). [ISSN](/source/ISSN_(identifier)) [0004-6361](https://search.worldcat.org/issn/0004-6361).

1. **[^](#cite_ref-5)** Chen, R.; Peng, B.; Strom, R. G.; Wei, J. (June 2012). ["Group of galaxies around the giant radio galaxy 4C 73.08"](https://doi.org/10.1111%2Fj.1365-2966.2012.20781.x). *Monthly Notices of the Royal Astronomical Society*. **422** (4): 3004–3009. [Bibcode](/source/Bibcode_(identifier)):[2012MNRAS.422.3004C](https://ui.adsabs.harvard.edu/abs/2012MNRAS.422.3004C). [doi](/source/Doi_(identifier)):[10.1111/j.1365-2966.2012.20781.x](https://doi.org/10.1111%2Fj.1365-2966.2012.20781.x). [ISSN](/source/ISSN_(identifier)) [0035-8711](https://search.worldcat.org/issn/0035-8711).

1. **[^](#cite_ref-6)** Saripalli, L.; Patnaik, A. R.; Porcas, R. W.; Graham, D. A. (December 1997). ["Nuclear radio emission in megaparsec-size radio galaxies"](https://articles.adsabs.harvard.edu/pdf/1997A%26A...328...78S). *Astronomy and Astrophysics*. **328**: 78–82. [Bibcode](/source/Bibcode_(identifier)):[1997A&A...328...78S](https://ui.adsabs.harvard.edu/abs/1997A&A...328...78S). [ISSN](/source/ISSN_(identifier)) [0004-6361](https://search.worldcat.org/issn/0004-6361).

1. **[^](#cite_ref-7)** Evans, Daniel A.; Hardcastle, Martin J.; Lee, Julia C.; Kraft, Ralph P.; Worrall, Diana M.; Birkinshaw, Mark; Croston, Judith H. (2008-08-04). "XMM-Newton Observations of the Nuclei of the Radio Galaxies 3C 305, DA 240, and 4C 73.08". *The Astrophysical Journal*. **688** (2): 844. [arXiv](/source/ArXiv_(identifier)):[0808.0455v1](https://arxiv.org/abs/0808.0455v1). [Bibcode](/source/Bibcode_(identifier)):[2008ApJ...688..844E](https://ui.adsabs.harvard.edu/abs/2008ApJ...688..844E). [doi](/source/Doi_(identifier)):[10.1086/592266](https://doi.org/10.1086%2F592266).

1. ^ [***a***](#cite_ref-:2_8-0) [***b***](#cite_ref-:2_8-1) Strom, R. G.; Chen, R.; Yang, J.; Peng, B. (2013-02-04). ["Structure and environment of the giant radio galaxy 4C 73.08"](https://academic.oup.com/mnras/article/430/3/2090/980917#25981421). *Monthly Notices of the Royal Astronomical Society*. **430** (3): 2090–2096. [doi](/source/Doi_(identifier)):[10.1093/mnras/stt033](https://doi.org/10.1093%2Fmnras%2Fstt033). [ISSN](/source/ISSN_(identifier)) [1365-2966](https://search.worldcat.org/issn/1365-2966).

1. **[^](#cite_ref-9)** Bruni, G; Panessa, F; Bassani, L; Dallacasa, D; Venturi, T; Saripalli, L; Brienza, M; Hernández-García, L; Chiaraluce, E; Ursini, F; Bazzano, A; Malizia, A; Ubertini, P (2020-03-19). ["Hard X-ray selected giant radio galaxies – II. Morphological evidence of restarted radio activity"](https://academic.oup.com/mnras/article/494/1/902/5809979). *Monthly Notices of the Royal Astronomical Society*. **494** (1): 902–914. [arXiv](/source/ArXiv_(identifier)):[2003.09183](https://arxiv.org/abs/2003.09183). [doi](/source/Doi_(identifier)):[10.1093/mnras/staa735](https://doi.org/10.1093%2Fmnras%2Fstaa735). [ISSN](/source/ISSN_(identifier)) [0035-8711](https://search.worldcat.org/issn/0035-8711).

1. **[^](#cite_ref-10)** Ramírez, E. A.; Tadhunter, C. N.; Dicken, D.; Rose, M.; Axon, D.; Sparks, W.; Packham, C. (2014-02-07). ["Hubble Space Telescope and Spitzer point-source detection and optical extinction in powerful narrow-line radio galaxies"](https://academic.oup.com/mnras/article/439/2/1270/1004253). *Monthly Notices of the Royal Astronomical Society*. **439** (2): 1270–1285. [arXiv](/source/ArXiv_(identifier)):[1401.1223](https://arxiv.org/abs/1401.1223). [doi](/source/Doi_(identifier)):[10.1093/mnras/stt2444](https://doi.org/10.1093%2Fmnras%2Fstt2444). [ISSN](/source/ISSN_(identifier)) [0035-8711](https://search.worldcat.org/issn/0035-8711).

## External links

- 4C 73.08 on [WikiSky](/source/WikiSky): [DSS2](http://www.wikisky.org/?object=4C+73.08&img_source=DSS2), [SDSS](http://www.wikisky.org/?object=4C+73.08&img_source=SDSS), [GALEX](http://www.wikisky.org/?object=4C+73.08&img_source=GALEX), [IRAS](http://www.wikisky.org/?object=4C+73.08&img_source=IRAS), [Hydrogen α](http://www.wikisky.org/?object=4C+73.08&img_source=HALPHA), [X-Ray](http://www.wikisky.org/?object=4C+73.08&img_source=RASS), [Astrophoto](http://www.wikisky.org/?object=4C+73.08&img_source=IMG_all), [Sky Map](http://www.wikisky.org/?object=4C+73.08), [Articles and images](http://www.wikisky.org/starview?object=4C+73.08)

v t e Constellation of Draco List of stars in Draco Draco in Chinese astronomy Stars Bayer α (Thuban) β (Rastaban) γ (Eltanin) δ (Altais) ε (Tyl) ζ (Aldhibah) η (Athebyne) θ ι (Edasich) κ λ (Giausar) μ (Alrakis) ν (Kuma) ξ (Grumium) ο π ρ σ (Alsafi) τ υ φ χ ψ1 (Dziban) ψ2 ω Flamsteed 4 6 7 (Tianyi) 8 (Taiyi) 10 (i) 15 (A) 18 (g) 19 (h) 26 36 39 (b) 42 (Fafnir) 45 (d) 50 59 64 (e) 68 Variable TW YY AG BY CL CM CX DO EK HP V581 HR 3751 4126 4934 5811 6237 6518 6618 (Alruba) 6817 7137 7783 HD 109246 (Funi) 101364 128717 147379 156279 158259 176693 191939 Other 2MASS 1237+6526 2MASS J17554042+6551277 G 240-72 GD 356 Gliese 420 Gliese 625 Gliese 687 GRW +70 8247 Kepler-4 Kepler-10 Kepler-12 Kepler-90 Kepler-296 KOI-256 LP 71-82 Qatar-1 SDSS J1240+6710 Struve 2398 TOI-1136 WD 1856+534 WISE 1647+5632 WISE 1841+7000 Exoplanets HD 139357 b HD 167042 b ι Dra b (Hypatia) Kepler-4b Kepler-10b c Kepler-12b Kepler-90e f g h i Kepler-296b c d e f TOI-1452 b TrES-2b Star clusters LAMOST 1 Nebulae Cat's Eye Nebula NGC 6742 Galaxies NGC 3147 3197 3735 4121 4125 4221 4236 4319 4331 4332 4363 4441 4513 4545 4589 5678 5777 5866 5866B 5879 5905 5907 5949 5963 5965 5982 5985 6090 6248 6285 6286 6338 6340 6365 6373 6394 6412 6503 6505 6566 6621 6622 6670 6676 6786 6789 Other 1ES 1927+654 1ES 1959+650 3C 249.1 3C 305 3C 319 3C 343 3C 343.1 3C 351 3C 356 3C 371 3C 380 3C 390.3 3C 401 4C +72.26 4C 73.08 8C 1241+735 Abell 2218 BCG Bean galaxy Beaver galaxy BZQ J1727+5510 Draco Dwarf Draco II GB 1508+5714 Goldfish galaxy H1821+643 HFLS3 IERS B1946+708 IRAS F17179+5444 IRAS 18580+6527 J120011.1+680924.8 KKR 25 Markarian 817 Markarian 876 Original TRG PGC 39058 Porphyrion QSO B1823+568 RGZ J172749.5+534647 S5 1803+784 S5 2007+777 SDSS J1715+6008 Tadpole Galaxy UGC 9391 UGC 9405 UGC 11241 UGC 11411 WISEA J145223.62+611707.5 WN B1851+5707 Galaxy clusters Abell 2218 CL1358+62 Draco Supercluster NGC 5866 Group Astronomical events SN 2003jb SN 2005B SN 2016aps Swift J1644+57 Category

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Adapted from the Wikipedia article [4C 73.08](https://en.wikipedia.org/wiki/4C_73.08) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/4C_73.08?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.