NGC 2935 explained

NGC 2935
Epoch:	J2000
Constellation Name:	Hydra
Sbrightness:	23.9 mag/arcsec^2
Z:	0.007575
H Radial V:	2271 ± 3 km/s
Dist Ly:	NaNMpc
Type:	(R')SAB(s)b
Size:	~56.79kpc (estimated)
Appmag V:	12.1

NGC 2935 is a large intermediate spiral galaxy located in the constellation Hydra. Its speed relative to the cosmic microwave background is 2,601 ± 23 km/s, which corresponds to a Hubble distance of 38.4 ± 2.7 Mpc (~125 million ly). It was discovered by German-British astronomer William Herschel on 20 March 1786.^{[1] [2]}

NGC 2935 was used by Gérard de Vaucouleurs as a galaxy of morphological type (R2')SAB(s)b in his galaxy atlas. The luminosity class of NGC 2935 is II and it has a broad HI line. In addition, it is a star-forming burst galaxy.^[3]

To date, 29 studies and measurements based on redshift give a distance of 27.890 ± 3.962 Mpc (~91 million ly),^[4] which is outside the Hubble distance values. Note that it is with the average value of independent measurements, when they exist, that the NASA/IPAC database calculates the diameter of a galaxy and that consequently the diameter of NGC 2935 could be approximately 78, 1 kpc (~255,000 ly) if we used the Hubble distance to calculate it.^[5]

Nuclei disk

Observations from the Hubble Space Telescope have concluded that a star-forming disk is present around the core of NGC 2935. The size of its semi-major axis is estimated at 530 pc (~1730 light years) at the estimated distance of this galaxy.^[6]

Supernovae

Four supernovae have been discovered in NGC 2935:

• SN 1975F (type unknown, mag. 15) was discovered on 11 June 1975, by Yvonne Dunlap and Justus R. Dunlap of the Corralitos Observatory at Northwestern University.^{[7] [8]}
• SN 1996Z (type Ia, mag. 16) was discovered on 16 May 1996 by Wayne Johnson.^{[9] [10]}
• SN 2021mwj (type II, mag. 17.7) was discovered on 21 May 2021 by ATLAS. ^[11]
• SN 2021aczp (type II, mag. 18.9) was discovered on 1 November 2021 by ATLAS.^[12]

NGC 2935 Group

NGC 2935 is part of a small group of three galaxies named after it. The other two galaxies in the NGC 2935 group are NGC 2983 and NGC 2986.^[13]

See also

• List of NGC objects (2001–3000)
• New General Catalogue
• List of spiral galaxies

External links

• NGC 2935 at NASA/IPAC
• NGC 2935 at SIMBAD
• NGC_2935 at LEDA

References

1. Web site: Results for object NGC 2935 . 2024-06-05 . ned.ipac.caltech.edu.
2. Web site: New General Catalogue Objects: NGC2935 . Seligman . Courtney . Celestial Atlas . 24 November 2024.
3. Web site: Revised data from NGC and IC catalogue by Wolfgang Steinickle, NGC 2900 to NGC 2999 . 2024-06-05 . astrovalleyfield.ca.
4. Web site: New General Catalog Objects: NGC 2900 - 2949 . 2024-06-05 . cseligman.com.
5. Web site: Gérard de Vaucouleurs' Atlas of Galaxies . 2024-06-05 . cseligman.com.
6. Web site: Comerón . S. . Knapen . J. H. . Beckman . J. E. . Laurikainen . E. . Salo . H. . Martínez-Valpuesta . I. . Buta . R. J. . AINUR: Atlas of Images of NUclear Rings . 2024-06-06 . academic.oup.com.
7. 1975IAUC.2782....1D. Supernovae. Dunlap. J. R.. Dunlap. Y.. International Astronomical Union Circular. 1975. 2782. 1 .
8. Web site: Transient Name Server . SN1975F . . 24 November 2024.
9. 1996IAUC.6401....1J. Supernova 1996Z in NGC 2935. Johnson. W.. Benetti. S.. Turatto. M.. Moehler. S.. Garnavich. P.. Riess. A.. Kirshner. R.. Jansen. R.. Barton. E.. International Astronomical Union Circular. 1996. 6401. 1.
10. Web site: Transient Name Server . SN 1996Z . . 18 August 2024.
11. Web site: Transient Name Server . SN 2021mwj . . 18 August 2024.
12. Web site: Transient Name Server . SN 2021aczp . . 18 August 2024.
13. Web site: List of nearby galaxy groups . 2024-06-06 . atunivers.free.fr.