lenticular galaxy
A lenticular galaxy (denoted S0) is a type of galaxy intermediate between an elliptical (denoted E) and a spiral galaxy in galaxy morphological classification schemes. It contains a large-scale disc but does not have large-scale spiral arms. L ...
and a
blue compact dwarf galaxy
A dwarf galaxy is a small galaxy composed of about 1000 up to several billion stars, as compared to the Milky Way's 200–400 billion stars. The Large Magellanic Cloud, which closely orbits the Milky Way and contains over 30 billion stars, is so ...
(BCD) in the southern
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
of
Pictor
Pictor is a constellation in the Southern Celestial Hemisphere, located between the star Canopus and the Large Magellanic Cloud. Its name is Latin for Painting, painter, and is an abbreviation of the older name Equuleus Pictoris (the "painter's ...
, positioned less than a degree to the east of
Iota Pictoris
ι Pictoris, Latinized from Iota Pictoris, is a suspected multiple star system in the southern Pictor constellation. It is visible to the naked eye as a dim, yellow-white-hued point of light with a combined apparent visual magnitude of ...
, and is undergoing a
starburst
MicroPro International Corporation was an American software company founded in 1978 in San Rafael, California. They are best known as the publisher of WordStar, a popular early word processor for personal computers.
History Founding and early su ...
. With an
apparent visual magnitude
Apparent magnitude () is a measure of the brightness of a star or other astronomical object observed from Earth. An object's apparent magnitude depends on its intrinsic luminosity, its distance from Earth, and any extinction of the object's lig ...
of 12.6 it requires a telescope to observe. It is estimated to be approximately 17 million light-years from the Earth, and is a member of the
Dorado Group
The Dorado Group is a loose concentration of galaxies containing both spirals and ellipticals. It is generally considered a 'galaxy group' but may approach the size of a 'galaxy cluster'. It lies primarily in the southern constellation Dorado a ...
.
This is a relatively isolated galaxy, with its nearest neighbors being more than distant. However, its neutral hydrogen disk shows a significant amount of warp, suggesting that the outer gas is still settling into place. The mass models of the galaxy suggest the dominant source of mass is a dark matter halo. It has a
super star cluster
A super star cluster (SSC) is a very massive young open cluster that is thought to be the precursor of a globular cluster. These clusters called "super" because they are relatively more luminous and contain more mass than other young star clusters. ...
located near the galactic center, and shows strong galactic winds. Designated NGC1750–1, this cluster has a maximum radius of and is Myr old.
The major starburst activity is happening at the core of the galaxy, within the central , and this is providing the main ionizing source out to distance of or more. Over the last 10 million years it has added worth of stars. The younger stars in the galaxy with an age below a billion years have an estimated and are mainly concentrated near the center, while the older star populations have and form a more extended distribution. The total mass of neutral hydrogen in the galaxy is estimated at .
1705
In the Swedish calendar it was a common year starting on Sunday, one day ahead of the Julian and ten days behind the Gregorian calendar.
Events
January–March
* January 8 – George Frideric Handel's first opera, ''Almira'' is p ...