NGC 4340 | |
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![]() Hubble Space Telescope image of NGC 4340 | |
Observation data (J2000 epoch) | |
Constellation | Coma Berenices |
Right ascension | 12h 23m 35.3s [1] |
Declination | 16° 43′ 20″ [1] |
Redshift | 0.003112/933 km/s [1] |
Distance | 56,070,000 ly |
Group or cluster | Virgo Cluster |
Apparent magnitude (V) | 12.10 [1] |
Characteristics | |
Type | SB0^+(r) [1] |
Size | ~ 53,400 ly |
Apparent size (V) | 3.5 x 2.8 [1] |
Other designations | |
CGCG 99-36, MCG 3-32-21, PGC 40245, UGC 7467, VCC 654 [1] |
NGC 4340 is a double-barred lenticular galaxy [2] [3] located about 55 million light-years away [4] in the constellation of Coma Berenices. [5] NGC 4340 was discovered by astronomer William Herschel on March 21, 1784. [6] NGC 4340 is a member of the Virgo Cluster. [2] [3] NGC 4340 is generally thought to be in a pair with the galaxy NGC 4350. [6] [7]
NGC 4340 has a small inner bar embedded in a luminous stellar nuclear ring. Even though the ring is luminous, there are no star-forming regions. Instead, the ring is made of mostly old stars in a gas-poor environment. The color of the ring is the same as the color of the surrounding bulge suggesting that it is probably an old, “fossil” remnant of an earlier episode of star-formation. [2] Crossing the inner ring, there is a larger primary bar with ansae at the ends. [3] Careful inspection shows that the two bars are slightly misaligned, which suggests they may be independently rotating. [2] The larger primary bar connects to another ring that surrounds the central regions of the galaxy. [7]
On January 27, 1977 a supernova of an unknown type was discovered in NGC 4340. [8] [9]
NGC 4559 is an intermediate spiral galaxy with a weak inner ring structure in the constellation Coma Berenices. Distance estimates for NGC 4559 range from about 28 million light-years to 31 million light-years, averaging about 29 million light-years.
NGC 7098 is a doubled barred spiral galaxy located about 95 million light-years away from Earth in the constellation of Octans. NGC 7098 has an estimated diameter of 152,400 light-years. NGC 7098 was discovered by astronomer John Herschel on September 22, 1835.
NGC 4274 is a barred spiral galaxy located in the constellation Coma Berenices. It is located at a distance of circa 45 million light years from Earth, which, given its apparent dimensions, means that NGC 4274 is about 95,000 light years across. It was discovered by William Herschel in 1785.
NGC 4477 is a barred lenticular galaxy located about 55 million light-years away in the constellation of Coma Berenices. NGC 4477 is classified as a type 2 Seyfert galaxy. The galaxy was discovered by astronomer William Herschel on April 8, 1784. NGC 4477 is a member of Markarian's Chain which forms part of the larger Virgo Cluster.
NGC 4489 is a dwarf elliptical galaxy located about 60 million light-years away in the constellation of Coma Berenices. It was discovered by astronomer William Herschel on March 21, 1784. NGC 4489 is a member of the Virgo Cluster.
NGC 4483 is a barred lenticular galaxy located about 55 million light-years away in the constellation of Virgo. NGC 4483 was discovered by astronomer Heinrich d'Arrest on March 19, 1865. NGC 4483 is a member of the Virgo Cluster.
NGC 4459 is a lenticular galaxy located about 50 million light-years away in the constellation of Coma Berenices. NGC 4459 is also classified as a LINER galaxy. NGC 4459 was discovered by astronomer William Herschel on January 14, 1787. NGC 4459 is a member of the Virgo Cluster.
NGC 4608 is a barred lenticular galaxy located in the constellation of Virgo. The galaxy was discovered by astronomer William Herschel on March 15, 1784. At about 56 million light-years away, it is a member of the Virgo Cluster.
NGC 4633 is a spiral galaxy located about 70 million light-years away in the constellation of Coma Berenices. It is interacting with the nearby galaxy NGC 4634. NGC 4633 was discovered by astronomer Edward D. Swift on April 27, 1887. It was rediscovered on November 23, 1900, by astronomer Arnold Schwassmann and was later listed as IC 3688. NGC 4633 is a member of the Virgo Cluster.
NGC 4873 is a lenticular galaxy located about 270 million light-years away in the constellation of Coma Berenices. NGC 4873 was discovered by astronomer Heinrich d'Arrest on May 10, 1863. The galaxy is a member of the Coma Cluster.
NGC 4919 is a lenticular galaxy located about 340 million light-years away in the constellation of Coma Berenices. NGC 4919 was discovered by astronomer Heinrich d'Arrest on May 5, 1864. NGC 4919 is a member of the Coma Cluster.
NGC 4468 is a dwarf elliptical galaxy located about 55 million light-years away in the constellation of Coma Berenices. The galaxy was discovered by astronomer William Herschel on January 14, 1787. It is a member of the Virgo Cluster.
NGC 4907 is a barred spiral galaxy located about 270 million light-years away in the constellation of Coma Berenices. It is also classified as a LINER galaxy. NGC 4907 was discovered by astronomer Heinrich d'Arrest on May 5, 1864. The galaxy is a member of the Coma Cluster, located equidistant between NGC 4928 and NGC 4829.
NGC 4689 is a spiral galaxy located about 54 million light-years away in the constellation of Coma Berenices. NGC 4689 is also classified as a LINER galaxy. NGC 4689 is inclined at an angle of about 36° which means that the galaxy is seen almost face-on to the Earth's line of sight. NGC 4689 was discovered by astronomer William Herschel on April 12, 1784. The galaxy is a member of the Virgo Cluster.
NGC 4479 is a barred lenticular galaxy located about 60 million light-years away in the constellation of Coma Berenices. NGC 4479 was discovered by astronomer William Herschel on April 8, 1784. It is a member of the Virgo Cluster.
NGC 4474 is an edge-on lenticular galaxy located about 50 million light-years away in the constellation Coma Berenices. NGC 4474 was discovered by astronomer William Herschel on April 8, 1784. It is a member of the Virgo Cluster.
NGC 4498 is a barred spiral galaxy located about 50 million light-years away in the constellation Coma Berenices. NGC 4498 was discovered by astronomer William Herschel on March 21, 1784. NGC 4498 is a member of the Virgo Cluster.
NGC 4506 is a spiral galaxy located around 50 million light-years away in the constellation Coma Berenices. It is classified as peculiar due to the presence of dust that surrounds its nucleus. NGC 4506 was discovered by astronomer William Herschel on January 14, 1787. It is a member of the Virgo Cluster.
NGC 4515 is a lenticular galaxy located about 57 million light-years away in the constellation Coma Berenices. NGC 4515 was discovered by astronomer William Herschel on March 21, 1784. The galaxy is a member of the Virgo Cluster.
NGC 3313 is a large barred spiral galaxy located about 55 megaparsecs away in the constellation Hydra. It was discovered by astronomer Ormond Stone in 1886 and is an outlying member of the Hydra Cluster.