NGC 1084

NGC 1084
NGC 1084 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationEridanus
Right ascension02h 45m 59.926s[1]
Declination−07° 34′ 43.10″[1]
Redshift1,406 km/s[2]
Distance62.7 Mly (19.23 Mpc)[2]
Apparent magnitude (V)10.7
Characteristics
TypeSAc[3][4]
Apparent size (V)3.2′ × 1.8′[3]
Other designations
LEDA 10464, MCG-01-08-007[5] PGC 10464[3]

NGC 1084 is an unbarred spiral galaxy in the constellation Eridanus. It is located at a distance of about 63 million light-years away from the Milky Way. The galaxy was discovered by William Herschel on 10 January 1785. It has multiple spiral arms, which are not well defined.[6] It belongs in the same galaxy group with NGC 988, NGC 991, NGC 1022, NGC 1035, NGC 1042, NGC 1047, NGC 1052 and NGC 1110. This group is in turn associated with the Messier 77 group.[7]

Star formation in the galaxy is chaotic and not confined to the spiral arms, but the rate is not high enough to classify it as a starburst galaxy. Star formation has taken place in small bursts in the last 40 million years. The cause of this activity has been proposed as a merger with a gas-rich dwarf galaxy. A radio source has been detected 3.5' south-west of the galaxy, connected to it by a bridge.[8]

NGC 1084 has been the site of 5 supernovae explosions since 1963: SN 1963P (type Ia, mag. 14),[9] SN 1996an (type II, mag. 14),[10] SN 1998dl (Type II, mag. 16),[11] SN 2009H (Type II, mag. 17.4),[12] and SN 2012ec (Type IIP, mag. 14.5).[13][14][15]

  1. ^ a b Cite error: The named reference Skrutskie2006 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tully2016 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference ned was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Ann2015 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Eskridge2002 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Makarov2016 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Ramya2007 was invoked but never defined (see the help page).
  9. ^ "SN 1963P". Transient Name Server. IAU. Retrieved 17 August 2024.
  10. ^ "SN 1996an". Transient Name Server. IAU. Retrieved 17 August 2024.
  11. ^ "SN 1998dl". Transient Name Server. IAU. Retrieved 17 August 2024.
  12. ^ "SN 2009H". Transient Name Server. IAU. Retrieved 16 August 2024.
  13. ^ "SN 2012ec". Transient Name Server. IAU. Retrieved 16 August 2024.
  14. ^ Cite error: The named reference CBT was invoked but never defined (see the help page).
  15. ^ Cite error: The named reference HST2014 was invoked but never defined (see the help page).