NGC 3754 is a small barred spiral galaxy[1] located in Leo.[2] It is located 447 million light-years away from the Solar System[3] and was discovered on April 5, 1874, by Ralph Copeland.[4]

NGC 3754
NGC 3754 is located left of the image above NGC 3753 and NGC 3750 which was taken by Mount Lemmon Observatory
Observation data (J2000 epoch)
ConstellationLeo
Right ascension11h 37m 54.921s
Declination+21d 59m 07.80s
Redshift0.029952
Heliocentric radial velocity8,979 km/s
Distance447 Mly (137 Mpc)
Group or clusterCopeland Septet
Apparent magnitude (V)14.3
Characteristics
TypeSBc
Size58,000 ly
Other designations
PGC 36018, CGCG 127-012N, MCG +04-28-011, VV 282b, Copeland Septet NED07, 2MASS J1137549+2159080, SDSS J113754.92+215907.8, HCG 057D, NSA 112842, AGC 210537, NVSS J113754+215910, 2XMM J113755.0+215908, LEDA 36018

The luminosity class of NGC 3754 is II[3] and it is listed as a LINER galaxy by SIMBAD, meaning, a nucleus presenting an emission spectrum characterized by broad lines of weak ionized atoms.[5]

Copeland Septet

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Sloan Digital Sky Survey image of NGC 3754 above two members of the Copeland Septet

NGC 3754 is a member of the Copeland Septet which is made up of 7 galaxies discovered by Copeland in 1874.[6] The other members of the group, are NGC 3745, NGC 3746, NGC 3748, NGC 3750, NGC 3751 and NGC 3753.[7]

Halton Arp noticed the 7 galaxies in an article published in 1966.[8] This group is designated as Arp 320 in which PGC 36010 is part of them.[9]

The 7 galaxies were also observed by Paul Hickson, in which he included them inside his article in 1982.[10] This group is known as Hickson 57, in which NGC 3754 is designated as HCG 57D.[11]

References

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  1. ^ "HyperLeda -object description". atlas.obs-hp.fr. Retrieved 2024-05-02.
  2. ^ Astronomy, Go. "NGC 3754 | galaxy in Leo | NGC List | GO ASTRONOMY". Go-Astronomy.com. Retrieved 2024-05-02.
  3. ^ a b "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-05-02.
  4. ^ "New General Catalog Objects: NGC 3750 - 3799". cseligman.com. Retrieved 2024-05-02.
  5. ^ "NGC 3754 - LINER-type Active Galaxy Nucleus". simbad.u-strasbg.fr. Retrieved 2024-05-02.
  6. ^ Bakich, Michael E. (2024-01-01). "Copeland's Septet". Astronomy Magazine. Retrieved 2024-05-02.
  7. ^ "Copeland's Septet (Hickson Compact Group 57) – Constellation Guide". www.constellation-guide.com. Retrieved 2024-05-02.
  8. ^ "NED Search Results for ARP 320". ned.ipac.caltech.edu. Retrieved 2024-05-02.
  9. ^ "Copeland's Septet (Arp 320) - Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes". cs.astronomy.com. Retrieved 2024-05-02.
  10. ^ Hickson, P. (1982-04-01). "Systematic properties of compact groups of galaxies". The Astrophysical Journal. 255: 382–391. Bibcode:1982ApJ...255..382H. doi:10.1086/159838. ISSN 0004-637X.
  11. ^ "Data for revised NGC and IC catalogue by Wolfgang Steinicke - NGC 3700 to 3799". astrovalleyfield.ca. Retrieved 2024-05-02.