Astronomy:NGC 1444
| NGC 1444 | |
|---|---|
 NGC 1444 imaged by the Sloan Digital Sky Survey | |
| Observation data (J2000 epoch) | |
| Constellation | Perseus |
| Right ascension | 03h 49m 23.8s[1] |
| Declination | +52° 29′ 24″[1] |
| Distance | 4.2 kly (1.3 kpc)[1] |
| Physical characteristics | |
| Estimated age | 7.08 Myr[1] |
| Other designations | Cr 43, C 0345+525, OCL 394[2] |
NGC 1444 is a small open cluster of stars in the northern constellation of Perseus, about 2-1⁄4° to the northwest of 43 Persei.[3] It has an angular diameter of 4 arcminutes and a brightness of 6.60 in visual magnitude. The cluster has sixty members of seventh magnitude or fainter, and is better appreciated in larger telescopes.[3] NGC 1444 was discovered on 18 December 1788 by the German-British astronomer William Herschel.[4][5][6] It is located at a distance of 4,200 light-years from the Sun and is about 7.1[1] million years old. The cluster has a physical core radius of 1.73 ± 0.42 ly and a tidal radius of 17.4 ± 4.2 ly.[1] The most prominent member is the triple star system Σ446, with a magnitude 6.7 primary.[7] The cluster is a member of the Camelopardalis OB1 association.[7]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Kharchenko, N. V. et al. (2013). "Global survey of star clusters in the Milky Way. II. The catalogue of basic parameters". Astronomy & Astrophysics 558: A53. doi:10.1051/0004-6361/201322302. Bibcode: 2013A&A...558A..53K.
- ↑ "NGC 1444". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+1444.
- ↑ 3.0 3.1 O'Meara, Steve (2007). Herschel 400 Observing Guide. Cambridge University Press. p. 329. ISBN 9780521858939. https://books.google.com/books?id=Nyh9fAC_tpIC&pg=PA329.
- ↑ Ford, Dominic. "The open cluster NGC 1444 - In-The-Sky.org" (in en). https://in-the-sky.org/data/object.php?id=NGC1444.
- ↑ "Results for object NGC 1444". https://ned.ipac.caltech.edu/byname?objname=NGC%201444.
- ↑ "Revised NGC Data for NGC 1444". http://spider.seds.org/ngc/revngcic.cgi?NGC%201444.
- ↑ 7.0 7.1 Crossen, Craig; Rhemann, Gerald (2012). Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. Springer Science & Business Media. p. 94. ISBN 9783709106266. https://books.google.com/books?id=3vELBwAAQBAJ&pg=PA94.
 |  |
