NGC 4728
Galaxy NGC 4728 |
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SDSS | |
AladinLite | |
Constellation | Berenike's hair |
Position equinox : J2000.0 , epoch : J2000.0 |
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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 .