Arp 256

Interacting galaxies in the constellation Cetus

Arp 256
Image taken by Hubble Space Telescope.
Observation data (J2000 epoch)
Constellation	Cetus
Right ascension	00^h 18^m 50.898^s^[1]
Declination	−10° 22′ 36.49″^[1]
Redshift	0.027^[1]
Heliocentric radial velocity	7985 km/s^[1]
Distance	380 Mly (115 Mpc)^[2]
Apparent magnitude (V)	S: 14.33^[1] N: 13.60^[1]
Apparent magnitude (B)	S: 14.81^[1] N: 13^[1]
Characteristics
Type	S: SB(s)b pec?^[2] N: SB(s)c pec^[2]
Apparent size (V)	S: 1.1′ × 0.6′^[3] N: 1.1′ × 0.8′^[4]
Notable features	Interacting galaxies
Other designations
Arp 256S: MCG-02-01-051, PGC 1224^[1] Arp 256N: MCG-02-01-052, PGC 1221^[4]

Arp 256 is a pair of interacting barred spiral galaxies located 380 million light years away from Earth in the constellation of Cetus. Arp 256 (also Arp 256S) refers to the southern galaxy;^[1] the northern galaxy is Arp 256N.^[4]

Both galaxies are undergoing intense star formation as seen from the many blue dots in them. Arp 256N has two long ribbon shaped spiral arms full of gas, dust and stars.^[5]

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j "Arp 256". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 March 2018.
^ ^a ^b ^c Gil de Paz, Armando; et al. (December 2007). "The GALEX Ultraviolet Atlas of Nearby Galaxies". The Astrophysical Journal Supplement Series. 173 (2): 185–255. arXiv:astro-ph/0606440. Bibcode:2007ApJS..173..185G. doi:10.1086/516636. S2CID 119085482.
^ "NED results for object ARP 256S". NASA/IPAC Extragalactic Database. National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 29 March 2018.
^ ^a ^b ^c "NED results for object ARP 256N". NASA/IPAC Extragalactic Database. National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 29 March 2018.
^ [email protected]. "Arp 256". www.spacetelescope.org. Retrieved 2023-11-26.

External links

Media related to Arp 256 at Wikimedia Commons

Constellation of Cetus

Stars

Bayer	α (Menkar) β (Diphda) γ (Kaffaljidhma) δ ε ζ (Baten Kaitos) η θ ι κ¹ κ² λ μ ν ξ¹ ξ² ο (Mira) A B π ρ σ τ υ φ¹ φ² φ³ φ⁴ χ
Flamsteed	1 2 3 6 7 9 13 14 20 46 49 56 (υ¹) 63 69 75 77 79 81 84 94 25 Ari
Variable	T UV YZ ZZ AY BL DK
HR	10 72 159 228 500
HD	1690 2638 4747 5319 6718 7449 11506 11964 15115 16008 224693 (Axólotl)
Other	2MASS J01225093−2439505 BD-07 436 BD−17 63 (Felixvarela) Cayrel's Star CFBDS J005910.90–011401.3 DENIS-P J020529.0−115925 GD 40 Gliese 105 GJ 1002 GJ 1005 HIP 5158 HIP 11952 LHS 1140 NGC 156 NGC 158 NGC 302 NGC 308 NGC 310 PSR J0108−1431 SDSS J001820.5−093939.2 SDSS J0106−1000 ULAS J003402.77−005206.7 WD J2356−209 WASP-26 WASP-44 WASP-71 (Mpingo) WISE J0254+0223 WHL0137-LS

Exoplanets	79 Ceti b 81 Ceti b 94 Ceti b BD−17 63 b HD 1461 b HD 2638 b HD 5319 b HD 11506 b c HD 11964 b c HD 224693 b HIP 5158 b c HIP 11915 b τ Ceti e f

Nebulae	NGC 246

Galaxies

Messier	77
NGC	17 35 45 47 50 54 59 61 62 64 65 66 73 77 102 107 113 114 116 117 118 120 124 132 135 142 143 144 145 151 154 155 157 161 163 165 166 167 168 170 171 172 173 177 178 179 187 191 192 195 196 197 201 207 209 210 216 217 219 223 227 230 232 235 237 239 244 245 247 255 259 263 268 270 271 273 274 275 276 277 279 283 284 285 286 291 293 297 298 301 303 307 309 320 321 325 327 329 331 333 335 336 337 340 341 342 343 344 345 347 349 350 351 352 353 355 356 357 359 363 364 367 369 377 391 413 417 426 428 429 430 435 442 445 448 450 478 480 481 487 493 497 519 521 533 540 541 545 547 555 560 570 584 585 596 615 622 655 681 690 701 720 755 779 800 806 838 864 874 880 908 936 950 960 965 966 985 988 1015 1019 1022 1032 1042 1052 1055 1073 1087 1090 1128 1142
Other	Arp 147 Arp 256 3C 75 Cetus Dwarf HCM-6A HD2 Holmberg 15A HXMM01 IC 1613 SDSS J0303-0019 SXDF-NB1006-2 9Spitch Wolf–Lundmark–Melotte