# Abell 754

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Galaxy cluster

Abell 754 Observation data (Epoch J2000) Constellation Hydra Right ascension 09h 08m 50.1s[1] Declination −09° 38′ 12″[1] Richness class 2[2] Bautz–Morgan classification I-II[2] Redshift 0.5420 (16 249 km/s)[1] Distance 233 Mpc (760 Mly) h−1 0.705 [1] X-ray flux 4.35×10−11 erg s−1 cm−2 (0.5–2 keV)[1]

**Abell 754** is a [galaxy cluster](/source/Galaxy_cluster) in the [constellation](/source/Constellation) [Hydra](/source/Hydra_(constellation)) that was formed from the collision of two smaller clusters. This collision, which began about 300 million years ago, is ongoing, and the system is still disturbed. Eventually, the cluster will reach a level of equilibrium in a few billion years.

## See also

- [Abell catalogue](/source/Abell_catalogue)

- [List of Abell clusters](/source/List_of_Abell_clusters)

## 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) ["NED results for object ABELL 0754"](http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=Abell+754&extend=no). NASA/IPAC Extragalactic Database (NED). Retrieved March 15, 2012.

1. ^ [***a***](#cite_ref-ACO_2-0) [***b***](#cite_ref-ACO_2-1) [Abell, George O.](/source/George_O._Abell); [Corwin, Harold G. Jr.](https://en.wikipedia.org/w/index.php?title=Harold_G._Corwin&action=edit&redlink=1); [Olowin, Ronald P.](https://en.wikipedia.org/w/index.php?title=Ronald_P._Olowin&action=edit&redlink=1) (May 1989). ["A catalog of rich clusters of galaxies"](http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?bibcode=1989ApJS...70....1A&page_ind=0&epage_ind=137&type=PRINTER&data_type=PDF_HIGH&email=&emailsize=500&emailsplit=YES&send=GET&verified=YES) (PDF). *Astrophysical Journal Supplement Series*. **70** (May 1989): 1–138. [Bibcode](/source/Bibcode_(identifier)):[1989ApJS...70....1A](https://ui.adsabs.harvard.edu/abs/1989ApJS...70....1A). [doi](/source/Doi_(identifier)):[10.1086/191333](https://doi.org/10.1086%2F191333). [ISSN](/source/ISSN_(identifier)) [0067-0049](https://search.worldcat.org/issn/0067-0049). Retrieved March 12, 2012.

## External links

- [MASSIVE MERGER OF GALAXIES IS THE MOST POWERFUL ON RECORD (NASA)](https://www.nasa.gov/centers/goddard/news/topstory/2004/0831galaxymerger.html)

- [Galaxies rent asunder in huge cosmic collision](https://www.theregister.co.uk/2004/09/24/galactic_super_prang/)

v t e Astronomical catalogs Abell Abell 749 Abell 750 Abell 751 Abell 752 Abell 753 Abell 754 Abell 755 Abell 756 Abell 757 Abell 758 Abell 759

v t e Constellation of Hydra List of stars in Hydra Hydra in Chinese astronomy Stars Bayer α (Alphard) β γ (Naga) δ ε (Ashlesha) ζ η θ ι (Ukdah) κ λ μ ν ξ ο π ρ σ (Minchir) τ1 τ2 υ1 (Zhang) υ2 φ1 φ2 φ3 χ1 χ2 ψ ω b1 b3 C F Flamsteed 1 2 3 6 (a) 9 10 12 (D) 14 15 17 19 20 21 23 24 25 26 27 (P) 28 29 33 (A) 34 37 44 47 48 50 51 (k) 52 (l) 54 (m) 55 56 57 58 (Solitaire) 59 60 10 Crt 17 Crt 20 Crt 2 Sex Variable R U V W TW EX HS KU LQ V361 V419 V421 V478 V484 HR 3378 3538 3749 (G) 3750 3858 (I) 3862 3919 3923 (Felis) 4162 4328 4339 (β Ant) 4445 5265 HD 72659 74156 82943 86226 86264 90156 (γ Ant) Other 2MASS 1114−2618 ESO 439-26 Gliese 328 Gliese 357 Gliese 433 Gliese 453 GJ 3634 HAT-P-30 HE 1256−2738 HE 1327−2326 LHS 2065 LHS 3003 LTT 3780 SDSS J090745.0+024507 WASP-25 WASP-36 WASP-84 WASP-166 (Filetdor) WISE 0855−0714 WISEA J1141−3326 Exoplanets Gliese 357 d HD 72659 b HD 74156 b c HD 82943 b c HD 86226 b HD 86264 b TW Hydrae b (unconfirmed) WASP-193b Star clusters Messier 48 Messier 68 NGC 5694 Price-Whelan 1 Nebulae Abell 33 Abell 35 NGC 3242 Southern Owl Nebula Galaxies Messier 83 NGC 2617 2642 2697 2708 2758 2835 2848 2865 2890 2935 2936 2937 2960 2962 2986 2992 3030 3052 3054 3081 3109 3124 3200 3285 3285B 3290 3305 3307 3308 3309 3311 3312 3313 3314 3315 3316 3336 3369 3383 3393 3402 3463 3464 3585 3621 3673 3717 3904 3923 3936 4980 4993 5042 5061 5078 5085 5101 5135 5260 5264 5495 5626 Other 3C 196.1 AM 1316−241 Arp 7 CTQ 327 ESO 510-G13 GAMA202627 GLEAM J0917−0012 Hydra A IC 535 MRC 1138−262 Peekaboo Galaxy PKS 1151−348 RX J0911.4+0551 SDSS J0841+0101 TN J0924−2201 Tololo 1247−232 ZwCl 1693 BCG Galaxy clusters Abell 754 Abell 3411 Abell 3412 Bullet Group Hickson 40 Astronomical events GW170817 Category

v t e Galaxies Morphology Disc Thick disk Thin disk Lenticular barred unbarred Spiral anemic barred flocculent grand design intermediate Magellanic unbarred Dwarf galaxy elliptical irregular spheroidal spiral Elliptical galaxy cD Irregular barred Peculiar Ring Polar Structure Active galactic nucleus Bar Bulge Central massive object Galactic Center Dark matter halo Disc Disc galaxy Halo corona Galactic plane Galactic ridge Interstellar medium Protogalaxy Galaxy filament Spiral arm Supermassive black hole Ultramassive Active nuclei Blazar BL Lacertae object LINER Little red dot Markarian Quasar Radio X-shaped DRAGN Relativistic jet Seyfert Energetic galaxies Lyman-alpha emitter Lyman-break Luminous infrared ULIRG HLIRG ELIRG Starburst blue compact dwarf blueberry pea faint blue Luminous infrared galaxy Hot dust-obscured Green bean galaxy Hanny's Voorwerp Wolf-Rayet galaxy Low activity Low surface brightness Ultra diffuse Dark galaxy Red nugget Blue Nugget Dead disk Interaction Binary galaxy Field Galactic tide Groups and clusters group cluster Brightest cluster galaxy fossil group Interacting merger collision cannibalism Jellyfish Satellite Stellar stream Superclusters Walls Voids and supervoids void galaxy Lists Galaxies Galaxies named after people Largest Smallest Nearest Polar-ring Ring Spiral Groups and clusters Large quasar groups Quasars List of the most distant astronomical objects Starburst galaxies Superclusters Voids Related Extragalactic astronomy Galactic astronomy Galactic coordinate system Galactic habitable zone Galactic magnetic fields Galactic orientation Galactic quadrant Galaxy color–magnitude diagram Galaxy formation and evolution Galaxy rotation curve Gravitational lens Gravitational microlensing Illustris project Intergalactic dust Intergalactic stars Intergalactic travel Population III stars Galaxy X (galaxy) Category Portal

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Adapted from the Wikipedia article [Abell 754](https://en.wikipedia.org/wiki/Abell_754) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Abell_754?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.