NGC 4728
| Galaxy NGC 4728 |
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|---|---|
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| SDSS | |
| AladinLite | |
| Constellation | Berenike's hair |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 50 m 28.1 s |
| declination | + 27 ° 26 ′ 06 ″ |
| Appearance | |
| Morphological type | E1 |
| Brightness (visual) | 14.6 mag |
| Brightness (B-band) | 15.6 mag |
| Angular expansion | 1.0 ′ × 0.7 ′ |
| Position angle | 108 ° |
| Surface brightness | 14.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.021502 ± 0.000090 |
| Radial velocity | 6446 ± 27 km / s |
|
Stroke distance v rad / H 0 |
(288 ± 20) x 10 6 ly (88.4 ± 6.2) Mpc |
| history | |
| discovery | Heinrich d'Arrest |
| Discovery date | March 3, 1867 |
| Catalog names | |
| NGC 4728, 4728A • PGC 43455 • CGCG 159-087 • MCG + 05-30-098 • 2MASX J12502807 + 2726056 • GC 5672 • HOLM 469A • LDCE 926 NED010 | |
NGC 4728 (also known as NGC 4728A ) is a 14.6 mag bright, elliptical galaxy of the Hubble type E1 in the constellation Haar der Berenike in the northern sky . It is estimated to be 288 million light years away from the Milky Way and has a diameter of about 85,000 ly.
In the same area of the sky there are u. a. the galaxies NGC 4692 , NGC 4715 , NGC 4721 , NGC 4745 .
The object was discovered by Heinrich Louis d'Arrest on March 3, 1867 and, together with the non-NGC objects PGC 43462 (called NGC 4728 B ) and PGC 214033 (called NGC 4728 C ), forms an optical triple constellation.
Web links
- NGC 4728. SIMBAD, accessed February 4, 2015 .
- NGC 4728. DSO Browser, accessed February 4, 2015 .
- Auke Slotegraaf: NGC 4728. Deep Sky Observer's Companion, accessed on February 4, 2015 .