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) | |
| Constellation | Leo |
| Right ascension | 11h 37m 54.921s |
| Declination | +21d 59m 07.80s |
| Redshift | 0.029952 |
| Heliocentric radial velocity | 8,979 km/s |
| Distance | 447 Mly (137 Mpc) |
| Group or cluster | Copeland Septet |
| Apparent magnitude (V) | 14.3 |
| Characteristics | |
| Type | SBc |
| Size | 58,000 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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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
edit- ^ "HyperLeda -object description". atlas.obs-hp.fr. Retrieved 2024-05-02.
- ^ Astronomy, Go. "NGC 3754 | galaxy in Leo | NGC List | GO ASTRONOMY". Go-Astronomy.com. Retrieved 2024-05-02.
- ^ a b "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-05-02.
- ^ "New General Catalog Objects: NGC 3750 - 3799". cseligman.com. Retrieved 2024-05-02.
- ^ "NGC 3754 - LINER-type Active Galaxy Nucleus". simbad.u-strasbg.fr. Retrieved 2024-05-02.
- ^ Bakich, Michael E. (2024-01-01). "Copeland's Septet". Astronomy Magazine. Retrieved 2024-05-02.
- ^ "Copeland's Septet (Hickson Compact Group 57) – Constellation Guide". www.constellation-guide.com. Retrieved 2024-05-02.
- ^ "NED Search Results for ARP 320". ned.ipac.caltech.edu. Retrieved 2024-05-02.
- ^ "Copeland's Septet (Arp 320) - Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes". cs.astronomy.com. Retrieved 2024-05-02.
- ^ 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.
- ^ "Data for revised NGC and IC catalogue by Wolfgang Steinicke - NGC 3700 to 3799". astrovalleyfield.ca. Retrieved 2024-05-02.