NGC 561 is a barred spiral galaxy located in the constellation Andromeda.[2] Its speed relative to the cosmic microwave background is 4,395 ± 20 km/s, which corresponds to a Hubble distance of 64.8 ± 4.6 Mpc (~211 million ly).[3] NGC 561 was discovered by Prussian astronomer Heinrich d'Arrest in 1862.[4]
| NGC 561 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Constellation | Andromeda |
| Right ascension | 01h 28m 18s[1] |
| Declination | 01° 28′ 18″[1] |
| Redshift | 0.015758[1] |
| Heliocentric radial velocity | 4687 ± 4 km/s[1] |
| Apparent magnitude (B) | 14.1 |
| Surface brightness | 23.44 mag/arcsec^2 |
| Other designations | |
| UGC 1048, MCG +06-04-029, PGC 5489[1] | |
The luminosity class of NGC 561 is I and it has a broad HI1 line.[1][clarification needed]
NGC 561 is part of the NGC 507 group. This vast group includes at least 42 galaxies, 21 of which appear in the NGC catalog and 5 in the IC catalog. Four members of this group are also Markarian galaxies. The brightest of these galaxies is NGC 507 and the largest is NGC 536.
See also edit
References edit
- ^ a b c d e f "NGC 561". simbad.cds.unistra.fr. Retrieved 2024-04-15.
- ^ "NGC 561 - Spiral Galaxy in Andromeda | TheSkyLive.com". theskylive.com. Retrieved 2024-04-15.
- ^ Astronomy, Go. "NGC 561 | galaxy in Andromeda | NGC List | GO ASTRONOMY". Go-Astronomy.com. Retrieved 2024-04-15.
- ^ "NGC 561 - spiral galaxy with bar. Description NGC 561". kosmoved.ru. Retrieved 2024-04-15.