NGC_6284

NGC 6284

NGC 6284

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NGC 6284 is a globular cluster located in the constellation Ophiuchus. It is designated as IX in the galaxy morphological classification scheme and was discovered by the German-born British astronomer William Herschel on 22 May 1784. Its distance had previously been estimated at 49,900 light years from Earth,[5][3][6][7][8] but this was revised in 2023 to around 43,000 light years.[2] This same study, based on high-resolution Hubble Space Telescope optical observations, produced the first high-quality colour-magnitude diagram (CMD) of NGC 6284, extending down to about six magnitudes below its main sequence turn-off. The new observations moved its centre of gravity by 1.5–3 arcseconds from previous values, and its density profile showed a steep central cusp, suggesting that NGC 6284 is a post-core collapse (PCC) cluster.

Quick Facts Observation data (J2000 epoch), Class ...

The nearby metal-poor star HD 194598 [es] may be a recent runaway from NGC 6284.[9]

See also

References

  1. [1]
    "NGC 6284". SIMBAD. Centre de données astronomiques de Strasbourg.
  2. [2]
    "Globular cluster NGC 6284 inspected by astronomers".
  3. [3]
    "Revised NGC Data for NGC 6284". Seds. Retrieved 3 October 2015.
  4. [4]
    William E. Harris. "Catalog of Parameters for Milky Way Globular Clusters". Retrieved 3 February 2017.
  5. [5]
    "Object No. 1 - NGC 6284". NASA/IPAC extragalactic database. NASA/IPAC. Retrieved 3 October 2015.
  6. [6]
    "NGC 6284 (= GCL 53)". cseligman. Retrieved 3 October 2015.
  7. [7]
    "NGC 6284". Seds. Retrieved 3 October 2015.
  8. [8]
    "The globular cluster NGC 6284". In-the-sky. Retrieved 3 October 2015.
  9. [9]
    Şahin, Timur; Bilir, Selçuk (2020), "On the Origin of Metal-poor Stars in the Solar Neighborhood", The Astrophysical Journal, 899 (1): 41, arXiv:2007.08514, Bibcode:2020ApJ...899...41S, doi:10.3847/1538-4357/aba2d2, S2CID 220545932
  • Media related to NGC 6284 at Wikimedia Commons


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