NGC 3561

NGC 3561
SDSS image of NGC 3561 (brightest round spot of "the guitar") and PGC 33992 (oval shape above NGC 3561). Ambartsumian's Knot is the blue speck below NGC 3561.
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension11h 11m 13.2s[1]
Declination+28° 41′ 47″[1]
Redshift0.029367[2]
Heliocentric radial velocity8804 km/s[2]
Distance412.3 Mly (126.41 Mpc)[3]
Group or clusterAbell 1185
Apparent magnitude (V)14.5[2]
Characteristics
TypeA: Sa[4]
B: E5[5]
Apparent size (V)1.36 x 0.69[2]
Other designations
A: Arp 105, UGC 6224, MCG +05-27-010, PGC 33991[4]
B: MCG +05-27-011, PGC 33992[5]

NGC 3561, also known as Arp 105, is a pair of interacting galaxies NGC 3561A and NGC 3561B within the galaxy cluster Abell 1185 in Ursa Major. Its common name is "the Guitar" and contains a small tidal dwarf galaxy known as Ambartsumian's Knot that is believed to be the remnant of the extensive tidal tail pulled out of one of the galaxies.[6]

One supernova has been observed in NGC 3561: SN 1953A (type unknown, mag. 16).[7]

  1. ^ a b Myers, S. T; Jackson, N. J; Browne, I. W. A; De Bruyn, A. G; Pearson, T. J; Readhead, A. C. S; Wilkinson, P. N; Biggs, A. D; Blandford, R. D; Fassnacht, C. D; Koopmans, L. V. E; Marlow, D. R; McKean, J. P; Norbury, M. A; Phillips, P. M; Rusin, D; Shepherd, M. C; Sykes, C. M (2003). "The Cosmic Lens All-Sky Survey - I. Source selection and observations". Monthly Notices of the Royal Astronomical Society. 341 (1): 1–12. arXiv:astro-ph/0211073. Bibcode:2003MNRAS.341....1M. doi:10.1046/j.1365-8711.2003.06256.x. S2CID 18706420.
  2. ^ a b c d "NED results for object NGC 3561". NASA/IPAC Extragalactic Database. National Aeronautics and Space Administration / Infrared Processing and Analysis Center. Retrieved 23 April 2018.
  3. ^ Crook, Aidan C.; Huchra, John P.; Martimbeau, Nathalie; Masters, Karen L.; Jarrett, Tom; Macri, Lucas M. (2007). "Groups of Galaxies in the Two Micron All Sky Redshift Survey". The Astrophysical Journal. 655 (2): 790–813. arXiv:astro-ph/0610732. Bibcode:2007ApJ...655..790C. doi:10.1086/510201. S2CID 11672751.
  4. ^ a b "NVSS J111112+284243". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 23 April 2018.
  5. ^ a b "NGC 3561". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 23 April 2018.
  6. ^ Galaxies with Proper Names
  7. ^ Transient Name Server entry for SN 1953A. Retrieved 28 March 2023.