NGC 680
| Galaxy NGC 680 |
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|---|---|
![NGC 678 (o), NGC 680 (m) & IC 1730 (lu) [1] 81 cm reflecting telescope of the Mount Lemmon Observatory.](https://de.wikipedia.org/wiki/Datei:N678s.jpg)
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| NGC 678 (o), NGC 680 (m) & IC 1730 (lu) 81 cm reflecting telescope of the Mount Lemmon Observatory . | |
| AladinLite | |
| Constellation | Aries |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 01 h 49 m 47.29 s |
| declination | 21 ° 58 ′ 15.1 ″ |
| Appearance | |
| Morphological type | E + / pec: |
| Brightness (visual) | 11.9 likes |
| Brightness (B-band) | 12.9 mag |
| Angular expansion | 1.8 ′ × 1.6 ′ |
| Position angle | 156 ° |
| Surface brightness | 13.1 mag / arcmin² |
| Physical data | |
| Affiliation | NGC 691 group LGG 34 |
| Redshift | 0.009767 ± 0.000017 |
| Radial velocity | 2928 ± 5 km / s |
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Stroke distance v rad / H 0 |
(136 ± 9) · 10 6 ly (41.6 ± 2.9) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | September 15, 1784 |
| Catalog names | |
| NGC 680 • UGC 1286 • PGC 6719 • CGCG 0147.0 + 2143 • MCG 04-05-015 • 2MASX J01494728 + 2158149 • GC 402 • H II 229 • GALEX ASC J014947.26 + 215814.5 • LDCE 109 NED003 | |
NGC 680 is a cD galaxy of the Hubble type E1 in the constellation Aries on the ecliptic . It is an estimated 136 million light years away from the Milky Way and about 70,000 light years across . Presumably it forms a gravitationally bound galaxy pair together with NGC 678 . She is a member of the ten galaxies NGC 691 group ( LGG 34 ).
In the same area of the sky are u. a. the galaxies NGC 691 , NGC 694 , IC 167 , IC 1730 .
According to an article in the journal " Monthly Notices of the Royal Astronomical Society ", it shows, like the galaxy NGC 5557 , clear indications of a collision and merging with another star system in the astronomically recent past. Instead of the expected seven to ten billion years, they would only be one to three billion years old and would thus deviate from the theory of the formation and development of star systems. With further observations, the astronomers now want to check whether the two galaxies are individual cases or whether elliptical galaxies are generally younger than predicted by the theory.
The object was discovered by Wilhelm Herschel on September 15, 1784 .
