Astronomy:NGC 3285B

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NGC 3285B
A spiral galaxy with a disc made up of several swirling arms. Patchy blue clouds of gas are speckled over the disc, where stars are forming and lighting up the gas around them. The core of the galaxy is large and shines brightly gold, while the spiral arms are a paler and faint reddish colour. Neighbouring galaxies - from small, elongated spots to larger swirling spirals - can be seen across the black background.
NGC 3285B imaged by the Hubble Space Telescope. SN 2023xqm is visible as a bright blue-white star below and to the left of the galaxy's nucleus.
Observation data (J2000 epoch)
ConstellationHydra
Right ascension 10h 34m 36.8767s[1]
Declination−27° 39′ 10.468″[1]
Redshift0.009847±0.0000033[1]
Helio radial velocity2,952±10 km/s[1]
Distance136.59 ± 2.83 Mly (41.880 ± 0.867 Mpc)[1]
Group or clusterNGC 3312 group (LGG 210), Hydra Cluster
Apparent magnitude (V)13.86[1]
Characteristics
TypeSB(rs)b[1]
Size~100,800 ly (30.92 kpc) (estimated)[1]
Apparent size (V)1.5′ × 1.1′[1]
Other designations
ESO 501- G 018, IRAS 10322-2723, MCG-04-25-022, PGC 31293[1]

NGC 3285B is a barred spiral galaxy in the constellation of Hydra. Its velocity with respect to the cosmic microwave background is 3,295±26 km/s, which corresponds to a Hubble distance of 158.5 ± 11.2 Mly (48.60 ± 3.43 Mpc).[1] However, five non-redshift measurements give a closer distance of 136.59 ± 2.83 Mly (41.880 ± 0.867 Mpc).[2] The earliest known reference to this galaxy comes from the 1964 book, Reference Catalogue of Bright Galaxies, written by Antoinette de Vaucouleurs, Gérard de Vaucouleurs, and Harlow Shapley.[3] Therefore, this galaxy, despite its common name, was not a part of the original New General Catalogue.

NGC 3312 group and Hydra cluster

NGC 3285B imaged by Legacy Surveys

According to A. M. Garcia, NGC 3285B is part of the NGC 3312 group (also known as LGG 210). This group of galaxies has at least 11 members, including NGC 3312, NGC 3314A, IC 2597, ESO 437-15, ESO 501-68, PGC 31441, PGC 31444, PGC 31496, PGC 31515 and PGC 31580.[4]

NGC 3285B and all galaxies in the NGC 3312 group are part of the Hydra Cluster (Abell 1060).[5] The Hydra Cluster is the dominant cluster of the Hydra–Centaurus Supercluster.[6]

Supernova

One supernova has been observed in NGC 3285B:

  • SN 2023xqm (Type Ia, mag. 17.885) was discovered by ATLAS on 13 November 2023.[7] A detailed study of this explosion confirmed its classification as a typical Type Ia supernova.[8]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 3285B". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+3285B. 
  2. ↑ "Distance Results for NGC 3285B". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3285B. 
  3. ↑ De Vaucouleurs, Gerard Henri; De Vaucouleurs, Antoinette; Shapley, Harlow (1964). Reference catalogue of bright galaxies. Bibcode: 1964rcbg.book.....D. 
  4. ↑ Garcia, A. M. (1993). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series 100: 47. Bibcode: 1993A&AS..100...47G. 
  5. ↑ Richter, O.-G. (1989). "The Hydra I cluster of galaxies. V. A catalogue of galaxies in the cluster area.". Astronomy and Astrophysics Supplement Series 77: 237. Bibcode: 1989A&AS...77..237R. https://ui.adsabs.harvard.edu/abs/1989A%26AS...77..237R. 
  6. ↑ Powell, Richard. "The Hydra Supercluster". http://www.atlasoftheuniverse.com/superc/hya.html. 
  7. ↑ "SN 2023xqm". IAU. https://www.wis-tns.org/object/2023xqm. 
  8. ↑ Zeng, Xiangyun et al. (2025). "SN 2023xqm: A gradually fading Ia supernova exhibiting isolated high-velocity signatures". Astronomy and Astrophysics 698: A70. Bibcode: 2025A&A...698A..70Z. https://ui.adsabs.harvard.edu/abs/2025A%26A...698A..70Z. 

Coordinates: Sky map 10h 34m 36.8767s, −27° 39′ 10.468″



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