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NGC 3754 is a small barred spiral galaxy located in
NGC 3754 is a member of the Copeland Septet which is made up of 7 galaxies discovered by Copeland in 1874. The other members of the group, are
Leo
Leo or Léo may refer to:
Acronyms
* Law enforcement officer
* Law enforcement organisation
* ''Louisville Eccentric Observer'', a free weekly newspaper in Louisville, Kentucky
* Michigan Department of Labor and Economic Opportunity
Arts an ...
. It is located 447 million light-year
A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...
s away from the Solar System
The Solar SystemCapitalization of the name varies. The International Astronomical Union, the authoritative body regarding astronomical nomenclature, specifies capitalizing the names of all individual astronomical objects but uses mixed "Solar S ...
and was discovered on April 5, 1874, by Ralph Copeland.
The luminosity class of NGC 3754 is II and it is listed as a LINER
A low-ionization nuclear emission-line region (LINER) is a type of galactic nucleus that is defined by its spectral line emission. The spectra typically include line emission from weakly ionized or neutral atoms, such as O, O+, N+, and S+. ...
galaxy by SIMBAD
SIMBAD (the Set of Identifications, Measurements and Bibliography for Astronomical Data) is an astronomical database of objects beyond the Solar System. It is maintained by the Centre de données astronomiques de Strasbourg (CDS), France.
SIMBA ...
, meaning, a nucleus presenting an emission spectrum
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an electron making a atomic electron transition, transition from a high energy state to a lower energy st ...
characterized by broad lines of weak ionized atom
Every atom is composed of a nucleus and one or more electrons bound to the nucleus. The nucleus is made of one or more protons and a number of neutrons. Only the most common variety of hydrogen has no neutrons.
Every solid, liquid, gas, and ...
s.
Copeland Septet
NGC 3754 is a member of the Copeland Septet which is made up of 7 galaxies discovered by Copeland in 1874. The other members of the group, are NGC 3745 NGC 3745 is a lenticular galaxy with a bar structure located in the constellation of Leo (constellation), Leo. NGC 3745 is located 471 million Light-year, light-years away from the Solar System and was discovered by Ralph Copeland on April 5, 1874, ...
, NGC 3746
NGC 3746 is a large barred spiral galaxy with a ring structure located in the Leo constellation. It is located 449 million light-years from the Solar System and has an approximate diameter of 165,000 light-years. NGC 3746 was discovered by Ralph ...
, NGC 3748
NGC 3748 is a lenticular galaxy with a bar located in the Leo (constellation), Leo constellation. It is located 440 million light-years away from the Solar System and was discovered by Ralph Copeland on April 5, 1874, but also observed by Hermann ...
, NGC 3750
NGC commonly refers to:
* New General Catalogue of Nebulae and Clusters of Stars, a catalogue of deep sky objects in astronomy
NGC may also refer to:
Companies
* NGC Corporation, name of US electric company Dynegy, Inc. from 1995 to 1998
* Nat ...
, NGC 3751
NGC 3751 is a type E-S0 lenticular galaxy located in the Leo constellation. It is located 450 million light-years away from the Solar System and was discovered by Ralph Copeland on April 5, 1874.
To date, a non-redshift measurement gives a dist ...
and NGC 3753.
Halton Arp
Halton Christian "Chip" Arp (March 21, 1927 – December 28, 2013) was an American astronomer. He was known for his 1966 ''Atlas of Peculiar Galaxies'', which (it was later theorized) catalogues many examples of interacting and merging galaxie ...
noticed the 7 galaxies
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. The word is derived from the Greek ' (), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System. ...
in an article published in 1966. This group is designated as Arp 320 in which PGC 36010 is part of them.
The 7 galaxies were also observed by Paul Hickson, in which he included them inside his article in 1982. This group is known as Hickson Hickson is an English surname. Notable people with the surname include:
*Catherine Hickson (born 1955), Canadian volcanologist
*Claude Hickson (1878–1948), New Zealand cricketer
*Darby Hickson, American graphic designer, wife of Karl Rove
*David ...
57, in which NGC 3754 is designated as HCG 57D.{{Cite web , title=Data for revised NGC and IC catalogue by Wolfgang Steinicke - NGC 3700 to 3799 , url=http://astrovalleyfield.ca/AstronomieCompl/NGC%20et%20autres/WolfgangS/N3700_exc_web.htm , access-date=2024-05-02 , website=astrovalleyfield.ca
References