# Bean galaxy

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Massive elliptical radio galaxy in the constellation Draco

Bean Galaxy DESI Legacy Surveys DR9 photo of the Bean Galaxy. Observation data (J2000 epoch) Constellation Draco Right ascension 17h 15m 30.04s Declination +64° 39' 51.61" Redshift 0.07898 Heliocentric radial velocity 22745 Distance 1.089 bly (334 mpc) Group or cluster SDSS-C4 3089 magnitude (K) 11.568 Characteristics Type cD Mass 1.349×1012 M☉ Size 319,000 ly (97,800 pc) Other designations 7C 1715+6442, LEDA 59953, PGC 59953, WN B1715+6442

The **Bean Galaxy**, also known as **7C 1715+6442** is a [supergiant elliptical galaxy](/source/Type-cD_galaxy), [active galaxy](/source/Active_galaxy), [radio galaxy](/source/Radio_galaxy), and [brightest cluster galaxy](/source/Brightest_cluster_galaxy) in the [constellation](/source/Constellation) of [Draco](/source/Draco_(constellation)).[1][2][3] The galaxy is 1.09 billion [light years](/source/Light_years) (or 334,000,000 [parsecs](/source/Parsecs)) away at a spectroscopic [redshift](/source/Redshift) of z = 0.07898.[1][2] The galaxy has an apparent K magnitude of 11.568.[1] The Bean Galaxy is the brightest cluster galaxy of SDSS-C4 3089, and this [galaxy cluster](/source/Galaxy_cluster) contains a total of 17 galaxies.[4] The galaxy was discovered in 1980 by the [Westerbork Radio Telescope](/source/Westerbork_Synthesis_Radio_Telescope) in the 14th list of radio sources.[5]

## Characteristics

The Bean Galaxy is a massive, large supergiant elliptical galaxy in the galaxy cluster, SDSS-C4 3089.[1][2] The galaxy has a total diameter of 319,000 light years (or 97,800 parsecs) across, or roughly three times larger than the [Milky Way](/source/Milky_Way).[2] The size was estimated using the 2MASS K-band total mag angular diameter of approximately one [arcmin](/source/Arcmin) (or 60.4 arcsecs), and a redshift-independent distance of 1.09 billion light years (or 334,000,000 parsecs) away.[2]

The Bean Galaxy is thought to be exceptionally massive, having a stellar mass of 1.35 trillion M☉ (or 1012.13).[6] The stellar population of the galaxy is predicted to be old, with an average age of 6.75 billion years old (or 109.829).[7] The stellar population mainly consists of metal-poor [red giant branch](/source/Red_giant_branch), and [asymptotic giant branch](/source/Asymptotic_giant_branch) stars.[7] The galaxy has a star-formation rate of 0.235 M☉ per year, typical for gas-poor elliptical galaxies.[8]

The galactic center of the Bean Galaxy has an [active galactic nucleus](/source/Active_galactic_nucleus) (also referred to as an AGN), which is small region in the galactic center of a galaxy that is very luminous and energetic.[2] The active galactic nucleus is powered by a large [supermassive black hole](/source/Supermassive_black_hole) (also known as an SMBH) with a mass of 2.207 billion M☉ estimated using velocity dispersion.[9]

The Bean Galaxy is classified as a giant radio galaxy (also called as an GRG), i. e. a [radio galaxy](/source/Radio_galaxy) with radio lobes larger than 2.2 million light years (or 700,000 parsecs) across.[9] It was first discovered in 1980 that the Bean Galaxy was a radio galaxy.[5] The radio emissions stretch roughly 3 million light years (or 926,000 parsecs) across, based on an angular diameter of 10 arcmin.[9] These radio lobes are created by the galaxy's massive central black hole.[9] This giant radio galaxy is unusual because it is located in a galaxy cluster, which is rare for giant radio galaxies,[9] and it is similar to other radio galaxies such as Inkathazo in both extent and location.[10]

## X-ray source

One [X-ray source](/source/Astrophysical_X-ray_source) has been discovered in the Bean Galaxy: **CXOX J171530.1+643950**, which is classified as a radio X-ray source, and was discovered in 2024 in a survey of 3.1 million X-ray sources.[11]

## References

1. ^ [***a***](#cite_ref-SIMBAD_1-0) [***b***](#cite_ref-SIMBAD_1-1) [***c***](#cite_ref-SIMBAD_1-2) [***d***](#cite_ref-SIMBAD_1-3) ["SIMBAD Results for Bean Galaxy"](https://simbad.u-strasbg.fr/simbad/sim-id?Ident=Bean+Galaxy&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id). *SIMBAD*. Retrieved 2026-01-10.

1. ^ [***a***](#cite_ref-NED_2-0) [***b***](#cite_ref-NED_2-1) [***c***](#cite_ref-NED_2-2) [***d***](#cite_ref-NED_2-3) [***e***](#cite_ref-NED_2-4) [***f***](#cite_ref-NED_2-5) ["NED Results for Bean Galaxy"](https://ned.ipac.caltech.edu/byname?objname=LEDA+59953&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1). *NASA/IPAC Extragalactic Database*. Retrieved 2026-01-10.

1. **[^](#cite_ref-Zhao2015_3-0)** Zhao, Dongyao (2015). ["The link between morphology and structure of brightest cluster galaxies: automatic identification of cDs"](https://doi.org/10.1093%2Fmnras%2Fstv190). *Monthly Notices of the Royal Astronomical Society*. **448** (3): 2530. [arXiv](/source/ArXiv_(identifier)):[1501.06352](https://arxiv.org/abs/1501.06352). [Bibcode](/source/Bibcode_(identifier)):[2015MNRAS.448.2530Z](https://ui.adsabs.harvard.edu/abs/2015MNRAS.448.2530Z). [doi](/source/Doi_(identifier)):[10.1093/mnras/stv190](https://doi.org/10.1093%2Fmnras%2Fstv190).

1. **[^](#cite_ref-SIMBAD2_4-0)** ["SIMBAD Results for SDSS-C4 3089"](https://simbad.cds.unistra.fr/simbad/sim-id?Ident=%405198673&Name=SDSS-C4%203089&submit=submit). *SIMBAD*. Retrieved 2026-01-10.

1. ^ [***a***](#cite_ref-Harris1980_5-0) [***b***](#cite_ref-Harris1980_5-1) Harris, D. E. (1980). ["Westerbork synthesis observations of 8 clusters of galaxies which contain tailed radio galaxies"](https://ui.adsabs.harvard.edu/abs/1980A%26AS...39..215H/abstract). *Astronomy and Astrophysics Supplement Series*. **39**: 215. [Bibcode](/source/Bibcode_(identifier)):[1980A&AS...39..215H](https://ui.adsabs.harvard.edu/abs/1980A&AS...39..215H). Retrieved 2026-01-10.

1. **[^](#cite_ref-Mamon2020_6-0)** Mamon, Gary (2020). ["The frequency of very young galaxies in the local Universe - II. The view from SDSS spectra"](https://doi.org/10.1093%2Fmnras%2Fstz3556). *Monthly Notices of the Royal Astronomical Society*. **492** (2): 1791. [arXiv](/source/ArXiv_(identifier)):[1912.06522](https://arxiv.org/abs/1912.06522). [Bibcode](/source/Bibcode_(identifier)):[2020MNRAS.492.1791M](https://ui.adsabs.harvard.edu/abs/2020MNRAS.492.1791M). [doi](/source/Doi_(identifier)):[10.1093/mnras/stz3556](https://doi.org/10.1093%2Fmnras%2Fstz3556).

1. ^ [***a***](#cite_ref-Mattolini2025_7-0) [***b***](#cite_ref-Mattolini2025_7-1) Mattolini, D. (2025). ["Re-assessing the stellar population scaling relations of the galaxies in the Local Universe"](https://ui.adsabs.harvard.edu/abs/2025A%26A...703A...5M/abstract). *Astronomy & Astrophysics*. **703**: A5. [arXiv](/source/ArXiv_(identifier)):[2509.04570](https://arxiv.org/abs/2509.04570). [Bibcode](/source/Bibcode_(identifier)):[2025A&A...703A...5M](https://ui.adsabs.harvard.edu/abs/2025A&A...703A...5M). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202554972](https://doi.org/10.1051%2F0004-6361%2F202554972). Retrieved 2026-01-10.

1. **[^](#cite_ref-Demers2019_8-0)** Demers, Melanie (2019). ["Smaller stellar disc scale lengths in rich environments"](https://doi.org/10.1093%2Fmnras%2Fstz2305). *Monthly Notices of the Royal Astronomical Society*. **489** (2): 2216. [arXiv](/source/ArXiv_(identifier)):[1908.06810](https://arxiv.org/abs/1908.06810). [Bibcode](/source/Bibcode_(identifier)):[2019MNRAS.489.2216D](https://ui.adsabs.harvard.edu/abs/2019MNRAS.489.2216D). [doi](/source/Doi_(identifier)):[10.1093/mnras/stz2305](https://doi.org/10.1093%2Fmnras%2Fstz2305).

1. ^ [***a***](#cite_ref-Oei2023_9-0) [***b***](#cite_ref-Oei2023_9-1) [***c***](#cite_ref-Oei2023_9-2) [***d***](#cite_ref-Oei2023_9-3) [***e***](#cite_ref-Oei2023_9-4) Oei, Martijn (2023). ["Measuring the giant radio galaxy length distribution with the LoTSS"](https://ui.adsabs.harvard.edu/abs/2023A%26A...672A.163O/abstrac). *Astronomy & Astrophysics*. **672**: A163. [arXiv](/source/ArXiv_(identifier)):[2210.10234](https://arxiv.org/abs/2210.10234). [Bibcode](/source/Bibcode_(identifier)):[2023A&A...672A.163O](https://ui.adsabs.harvard.edu/abs/2023A&A...672A.163O). [doi](/source/Doi_(identifier)):[10.1051/0004-6361/202243572](https://doi.org/10.1051%2F0004-6361%2F202243572). Retrieved 2026-01-10.

1. **[^](#cite_ref-Charlton2025_10-0)** Charlton, K. K. L. (2025). ["A spatially resolved spectral analysis of giant radio galaxies with MeerKAT"](https://doi.org/10.1093%2Fmnras%2Fstae2543). *Monthly Notices of the Royal Astronomical Society*. **537** (1): 272. [arXiv](/source/ArXiv_(identifier)):[2411.06813](https://arxiv.org/abs/2411.06813). [Bibcode](/source/Bibcode_(identifier)):[2025MNRAS.537..272C](https://ui.adsabs.harvard.edu/abs/2025MNRAS.537..272C). [doi](/source/Doi_(identifier)):[10.1093/mnras/stae2543](https://doi.org/10.1093%2Fmnras%2Fstae2543).

1. **[^](#cite_ref-Flesch2024_11-0)** Flesch, Eric (2024). ["The Millions of Optical-Radio/X-ray Associations (MORX) Catalogue, v2"](https://doi.org/10.21105%2Fastro.2308.01507). *The Open Journal of Astrophysics*. **7**: 6. [arXiv](/source/ArXiv_(identifier)):[2308.01507](https://arxiv.org/abs/2308.01507). [Bibcode](/source/Bibcode_(identifier)):[2024OJAp....7E...6F](https://ui.adsabs.harvard.edu/abs/2024OJAp....7E...6F). [doi](/source/Doi_(identifier)):[10.21105/astro.2308.01507](https://doi.org/10.21105%2Fastro.2308.01507).

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 [Bean galaxy](https://en.wikipedia.org/wiki/Bean_galaxy) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Bean_galaxy?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.