NGC 404

NGC 404
NGC 404 by Hubble Space Telescope; 1.68′ view
Observation data (J2000 epoch)
ConstellationAndromeda
Right ascension01h 09m 27.0s[1]
Declination+35° 43′ 04″[1]
Redshift−48 ± 9 km/s[1]
Distance10.0 ± 0.7 Mly (3.07 ± 0.21 Mpc)[2][3][4][a]
Apparent magnitude (V)11.2[1]
Characteristics
TypeSA(s)0−[1]
Apparent size (V)3′.5 × 3′.5[1]
Other designations
UGC 718, PGC 4126[1]
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NGC 404 is a field galaxy[5] located about 10 million light years away in the constellation Andromeda. It was discovered by William Herschel in 1784, and is visible through small telescopes.[6] NGC 404 lies just beyond the Local Group and does not appear gravitationally bound to it. It is located within 7 arc-minutes of second magnitude star Mirach, making it a difficult target to observe or photograph and granting it the nickname "Mirach's Ghost".[6][7]

  1. ^ a b c d e f g "NASA/IPAC Extragalactic Database". Results for NGC 404. Retrieved 2006-11-18.
  2. ^ Cite error: The named reference jensenetal2003 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference karachentsevetal2004 was invoked but never defined (see the help page).
  4. ^ Karachentsev, I. D.; Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics. 49 (1): 3–18. Bibcode:2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6. S2CID 120973010.
  5. ^ Materne, J. (April 1979). "The structure of nearby groups of galaxies – Quantitative membership probabilities". Astronomy and Astrophysics. 74 (2): 235–243. Bibcode:1979A&A....74..235M.
  6. ^ a b Mirach's Ghost (NGC 404), The Internet Encyclopedia of Science, David Darling. Accessed on line August 15, 2008.
  7. ^ "'Ghost of Mirach' Materializes in Space Telescope Image". Jet Propulsion Laboratory. 31 October 2008. Archived from the original on 16 June 2017. Retrieved 26 September 2013.