NGC 1444

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NGC 1444
NGC 1444 DSS.jpg
NGC 1444 imaged by the Sloan Digital Sky Survey
Observation data (J2000 epoch)
Right ascension 03h 49m 23.8s [1]
Declination +52° 29′ 24″ [1]
Distance 4.2  kly (1.3  kpc) [1]
Physical characteristics
Estimated age7.08 Myr [1]
Other designations Cr 43, C 0345+525, OCL 394 [2]
Associations
Constellation Perseus
See also: Open cluster, List of open clusters

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. 1 2 3 4 5 6 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. arXiv: 1308.5822 . Bibcode:2013A&A...558A..53K. doi:10.1051/0004-6361/201322302. S2CID   118548517.
  2. ↑ "NGC 1444". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 9 April 2020.
  3. 1 2 O'Meara, Steve (2007). Herschel 400 Observing Guide. Cambridge University Press. p. 329. ISBN   9780521858939.
  4. ↑ Ford, Dominic. "The open cluster NGC 1444 - In-The-Sky.org". in-the-sky.org. Retrieved 9 December 2019.
  5. ↑ "Results for object NGC 1444". ned.ipac.caltech.edu. Retrieved 9 December 2019.
  6. ↑ "Revised NGC Data for NGC 1444". spider.seds.org. Retrieved 9 December 2019.
  7. 1 2 Crossen, Craig; Rhemann, Gerald (2012). Sky Vistas: Astronomy for Binoculars and Richest-Field Telescopes. Springer Science & Business Media. p. 94. ISBN   9783709106266.
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