NGC 4725, NGC 4712, NGC 4747

Also Known as: UGC 7989, PGC 43451 (NGC 4725), UGC 7977 (NGC 4512), UGC 8005, PGC 43586 (NGC 4747)

Object Type: Intermediate Spiral Galaxy (NGC 4725), Spiral Galaxy (NGC 4712), Barred Spiral Galaxy (NGC 4747)

Constellation: Coma Berenices

Distance from Earth: 40 million light years (NGC 4725), 224 million light years (NGC 4712), 32 milion light years (NGC 4747)

Apparent Magnitude: 10.1 (NGC 4725), 13.5 (NGC 4512), 12.4 (NGC 4747)

Coordinates: RA 12H 50M 26.56S DEC 25 deg 30 min 02.74 sec (NGC 4725), RA 12H 49M 33S DEC 25 deg 28 min 11 sec (NGC 4712), RA 12H 51M 45.9S DEC 25 deg 46 min 37 sec (NGC 4747)

Actual Size: 150,700 light years in diameter (NGC 4725), 35,000 light years in diameter (NGC 4747)

Apparent Dimensions: 9.77 arc-minutes x 6.76 arc-minutes (NGC 4725), 1.56 arc-minutes x 0.75 arc-minutes (NGC 4712), 3.5 arc-minutes x 1.2 arc-minutes (NGC 4747)

Discovered by: NGC 4725 was discovered by German-born British astronomer William Herschel on April 6, 1785.
NGC 4712 was discovered by German-British astronomer John Herschel in 1832.
NGC 4747 was discovered by William Herschel on April 6, 1785. It is included in the Atlas of Peculiar Galaxies in the interior absorption category.

Description: NGC 4725, NGC 4747 and NGC 4712 are three galaxies in Coma Berenice. The larger of these (NGC 4725) is about the same size as the Andromeda galaxy.
Equally far away is its companion NGC 4747 which shows signs of a violent past. The smaller galaxy NGC 4712 is not bound to the former two. This is an emission line galaxy, some 200 million light years from us. NGC 4725 is an intermediate barred spiral galaxy with a prominent ring structure, located in the northern constellation of Coma Berenices near the north galactic pole.
NGC 4725 is the brightest member of the Coma I Group of the Coma-Sculptor Cloud, although it is relatively isolated from the other members of this group.
NGC 4725 is strongly disturbed and is interacting with neighboring spiral galaxy NGC 4747, with its spiral arms showing indications of warping.
The pair have an angular separation of 24′, which corresponds to a projected linear separation of 370,000 light years. A tidal plume extends from NGC 4747 toward NGC 4725. NGC 4725 is a suspected type 2 Seyfert galaxy with a supermassive black hole at the core. The morphological classification of NGC 4725 is SAB(r)ab pec, indicating a peculiar, weakly-barred spiral galaxy (SAB) with a complete ring surrounding the bar (r) and somewhat tightly-wound spiral arms (ab). It is actually double-barred, a feature found among about a third of all barred spirals. The galactic plane is inclined by approximately 46° to the line of sight from the Earth.
The ring structure of NGC 4725 is a region of star formation. It is offset from the galactic center and displays non-circular motion.
NGC 4725 is thought to have only one spiral arm. Most spiral galaxies have two or more arms. Astronomers refer to NGC 4725 as a ringed barred spiral galaxy because a prominent ring of stars encircles a bar of stars at its center.
NGC 4747 is a member of the Coma I Group, which is part of the Local Supercluster. NGC 4747 is interacting with neighboring spiral galaxy NGC 4725, with its spiral arms showing indications of warping.
A close approach between NGC 4747 and the more massive NGC 4725 that took place 320 million years before observed created tidal plumes in NGC 4747.

Click Below Image(s) for Full Size:

NGC 4725 is a Intermediate Spiral Galaxy in the Coma Berenices constellation. NGC 4725 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.
Given its visual magnitude, NGC 4725 is visible with the help of a telescope having an aperture of 8 inches (200mm) or more.
NGC 4712 is a Spiral Galaxy in the Coma Berenices constellation. NGC 4712 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.
Given its B magnitude, NGC 4712 is visible with the help of a telescope having an aperture of 14 inches (350mm) or more.
NGC 4747 is a Barred Spiral Galaxy in the Coma Berenices constellation. NGC 4747 is situated north of the celestial equator and, as such, it is more easily visible from the northern hemisphere.
Given its B magnitude, NGC 4747 is visible with the help of a telescope having an aperture of 10 inches (250mm) or more.

Platesolve

NGC 4725, NGC 4712, NGC 4747 Galaxies

NGC 4725 Spiral Galaxy

Imaging Details
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