NGC 1156

NGC 1156
NGC 1156 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation	Aries
Right ascension	02^h 59^m 42.2^s^[1]
Declination	+25° 14′ 14″^[1]
Redshift	375 ± 1 km/s^[1]
Apparent magnitude (V)	12.3^[1]
Characteristics
Type	IB(s)m^[1]
Apparent size (V)	3.3′ × 2.5′^[1]
Other designations
UGC 2455,^[1] PGC 11329^[1]

NGC 1156 is a dwarf irregular galaxy in the Aries constellation of the type ibm. It is considered a Magellanic-type irregular. The galaxy has a larger than average core, and contains zones of contra-rotating gas. The counter-rotation is thought to be the result of tidal interactions with another gas rich galaxy some time in the past.

It has a H II nucleus.^[2]

The AGES survey has discovered a candidate dark galaxy close to NGC 1156, one of only a few so far found.

References

^ ^a ^b ^c ^d ^e ^f ^g ^h "NASA/IPAC Extragalactic Database". Results for NGC 1156. Retrieved 2006-11-27.
^ Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (October 1997). "A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". Astrophysical Journal Supplement. Vol. 112, no. 2. pp. 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.

External links

Media related to NGC 1156 at Wikimedia Commons
Arecibo Survey Produces Dark Galaxy Candidate (SpaceDaily)
http://www.astrophotos.net/pages/GALAXIES/NGC%201156.htm
http://www.jupiter-jp.net/~ike/English/description/N1156.htm
http://www.ursa.fi/~sirius/cgi-bin/rade.cgi?NGC1156

New General Catalogue 1000 to 1499

Constellation of Aries

Stars

Bayer	α (Hamal) β (Sheratan) γ (Mesarthim) δ (Botein) ε ζ η θ ι κ λ μ ν ξ ο π ρ¹ ρ² ρ³ σ τ¹ τ²
Flamsteed	1 4 7 10 11 14 15 16 19 20 21 23 26 27 29 30 31 33 35 36 38 39 (Lilii Borea) 40 41 (Bharani) 47 49 50 51 52 53 54 55 56 59 60 62 64 65 66 54 Cet 85 Cet
Variable	TZ UX VZ (16 Tri)
HR	577 728 803 952 999
HD	12661 20367
Other	BD+20°307 HIP 14810 HAT-P-25 Teegarden's Star WASP-11/HAT-P-10 WD 0145+234

Exoplanets	α Arietis b HD 12661 b c HIP 14810 b c d Teegarden's Star b c WASP-11b/HAT-P-10b

Galaxies

NGC	677 680 691 694 695 716 765 770 772 781 803 817 820 821 871 877 900 901 903 904 918 935 938 972 990 992 1024 1134 1156
Other	1ES 0229+200 3C 79 4C +28.07 AO 0235+164 IC 167 IC 1801 PSO J0309+27 Segue 2 UGC 2140

Galaxy clusters	MS 0302+17

Astronomical events	GRB 060218

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