|Description of NGC 6401|
Discovered by William Herschel on May 21, 1784.
This globular cluster was first taken for a bright nebula by W. Herschel, and cataloged accordingly as H I.44. John Herschel also described it as a nebula, as he apparently couldn't resolve it into stars either.
In 1977, Peterson announced the finding of another planetary nebula in the neighborhood, and perhaps associated with globular cluster NGC 6401 in Ophiuchus; this planetary nebula candidate was cataloged as Peterson 1 (Pt 1; PK 004+03.1). However, in 1990 Acker and Stenholm found that this object exhibits a red stellar continuum - thus is not a planetary nebula but a symbiotic star.
Source: Seds.org | Notify inaccuracies
Image of the cluster from the Digital Sky Survey
ADS "Object Search"
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|Selected biblio |
|Paper n. 1|
Variable stars in the bulge globular cluster NGC 6401
2017, MNRAS, Volume 465, Issue 2, p.2489-2504
(NGC 6401 )
|Paper n. 2|
Barbuy, B.; Ortolani, S.; Bica, E.; Desidera, S.|
The metal-rich bulge globular cluster NGC 6401
1999, Astronomy and Astrophysics, v.348, p.783-788 (1999)
(NGC 6401 cmd )
|Paper n. 3|
Terzan, A.; Rutily, B.|
Globular clusters NGC 6304 and NGC 6401
1972, Astronomy and Astrophysics, Vol. 16, p. 408 - 416
(NGC 6304 NGC 6401 )
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