NGC 5394 is a barred spiral galaxy located in the constellation Canes Venatici. Its speed relative to the cosmic microwave background is 3,639 ± 14 km/s, which corresponds to a Hubble distance of 53.7 ± 3.8 Mpc (∼175 million ly).[1] NGC 5394 was discovered by German-British astronomer William Herschel in 1787.

NGC 5394
NGC 5394 (right) and NGC 5395 (left), as imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationCanes Venatici
Right ascension13h 58m 33s
Declination+37° 27’ 12”
Redshift0.011501
Heliocentric radial velocity3,448 km/s
Distance175 Mly (53.67 Mpc)
Apparent magnitude (B)13.7
Absolute magnitude (V)13.12
Surface brightness23.78 mag/arcsec^2
Characteristics
TypeSBb
Size96,900 ly (29.7 kpc estimated)
Apparent size (V)1.9' x 1.3'
Other designations
PGC 49739, UGC 8898, VV 48b, Arp 84, IRAS 13564+3741, MCG +06-31-033, CGCG 191-024

The luminosity class of NGC 5394 is II and it has a broad HI line. It also contains regions of ionized hydrogen. It is also a Luminous Infrared Galaxy (LIRG).[1]

To date, one non-redshift-based measurement gives a distance of approximately 32,900 Mpc (∼107 million ly).[2] This value is far 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.

One supernova has been observed in NGC 5394: SN 2020aaxs (type Ib, mag. 17).[3]

Arp 84

edit

NGC 5394 and NGC 5395 are a pair of gravitationally interacting galaxies that appear in Halton Arp's Atlas of Peculiar Galaxies under the designation Arp 84.[4] Arp noted that NGC 5495 is a spiral with a high surface luminosity companion at the end of one of its arms.[4]

NGC 5395 group

edit

According to A.M. Garcia, NGC 5394 is part of a group of galaxies that has at least five members, the NGC 5395 group. The other galaxies are NGC 5341, NGC 5351, NGC 5395 and UGC 8806.[5]

See also

edit
edit

References

edit
  1. ^ a b "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-07-24.
  2. ^ "NED Query Results for NGC 5393". ned.ipac.caltech.edu. Retrieved 2024-07-24.
  3. ^ Transient Name Server entry for SN 2020aaxs. Retrieved 23 July 2024.
  4. ^ a b Arp, Halton (1966-11-01). "Atlas of Peculiar Galaxies". The Astrophysical Journal Supplement Series. 14: 1. doi:10.1086/190147. ISSN 0067-0049.
  5. ^ Garcia, A. M. (1993-07-01). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47–90. ISSN 0365-0138.