NGC 152

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NGC 152
NGC 152 HST.jpg
NGC 152 as seen from the Hubble Space Telescope
Observation data (J2000 epoch)
Right ascension 00h 32m 56.26s [1]
Declination −73° 06′ 56.6″ [1]
Apparent magnitude  (V)12.26 [1]
Apparent dimensions (V)3.00′ × 3.00′ [2]
Physical characteristics
Mass2.5×104 [3]   M☉
Estimated age1.40±0.20 Gyr [3]
Other designationsESO 28-24 [4]
Associations
Constellation Tucana
See also: Open cluster, List of open clusters

NGC 152 is an open cluster in the constellation Tucana. It was discovered by John Herschel on September 20, 1835. [5] It is located within the Small Magellanic Cloud. [1]

Contents

NGC 152 is about 1.40 billion years old. Its estimated mass is 2.5×104  M☉, and its total luminosity is 8.0×104  L☉, leading to a mass-to-luminosity ratio of 0.31 M☉/L☉. [3] All else equal, older star clusters have a lower luminosity for the same mass; that is, their mass-to-luminosity ratios are higher. [3]

See also

Related Research Articles

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<span class="mw-page-title-main">NGC 346</span> Open cluster in the constellation Tucana

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NGC 290 is an open cluster of stars in the southern constellation of Tucana. This cluster was discovered September 5, 1826, by Scottish astronomer James Dunlop. It lies some 200,000 light years away from the Sun in the Small Magellanic Cloud galaxy. The cluster is an estimated 30–63 million years old and is around 65 light years across.

<span class="mw-page-title-main">NGC 265</span> Open star cluster in the constellation Tucana

NGC 265 is an open cluster of stars in the southern constellation of Tucana. It is located in the Small Magellanic Cloud, a nearby dwarf galaxy. The cluster was discovered by English astronomer John Herschel on April 11, 1834. J. L. E. Dreyer described it as, "faint, pretty small, round", and added it as the 265th entry in his New General Catalogue.

<span class="mw-page-title-main">NGC 2257</span> Globular cluster in the constellation Dorado

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<span class="mw-page-title-main">NGC 371</span> Open cluster in the constellation Tucana

NGC 371, also called Hodge 53, is an open cluster 200,000 light-years away located in the Small Magellanic Cloud in Tucana constellation.

<span class="mw-page-title-main">NGC 339</span> Globular cluster in the Small Magellanic Cloud

NGC 339 is a globular cluster in the constellation Tucana the Toucan. It is located both visually and physically in the Small Magellanic Cloud, being only about 10,000 ± 12,000 light years closer than the cloud. It is rather prominent, being the brightest cluster in the southern reaches of the cloud. It was discovered by John Herschel on September 18, 1835. It was observed in 2005 by the Hubble Space Telescope. Its apparent V-band magnitude is 12.12, but at this wavelength, it has 0.19 magnitudes of interstellar extinction.

<span class="mw-page-title-main">NGC 121</span> Globular cluster in the constellation Tucana

NGC 121 is a globular cluster of stars in the southern constellation of Tucana. It is the oldest globular cluster in the Small Magellanic Cloud (SMC), which is a dwarf satellite galaxy of the Milky Way. This cluster was first discovered by English astronomer John Herschel on September 20, 1835. The compiler of the New General Catalogue, Danish astronomer John Louis Emil Dreyer, described this object as "pretty bright, pretty small, little extended, very gradually brighter middle". The cluster is located at a distance of around 200,000 light-years (60 kpc) from the Sun.

<span class="mw-page-title-main">AB8 (star)</span> Binary star located in the Small Magellanic Cloud in the constellation Hydrus

AB8, also known as SMC WR8, is a binary star in the Small Magellanic Cloud (SMC). A Wolf-Rayet star and a main sequence companion of spectral type O orbit in a period of 16.638 days. It is one of only nine known WO stars, the only Wolf-Rayet star in the SMC not on the nitrogen sequence, and the only Wolf-Rayet star in the SMC outside the main bar.

<span class="mw-page-title-main">NGC 299</span> Open star cluster in the constellation Tucana

NGC 299 is an open cluster of stars in the main body of the Small Magellanic Cloud – a nearby dwarf galaxy. It is located in the southern constellation of Tucana, just under 200,000 light years distant from the Sun. The cluster was discovered on August 12, 1834, by English astronomer John Herschel.

<span class="mw-page-title-main">NGC 330</span> Open star cluster in the constellation Tucana

NGC 330 is an open cluster in the Small Magellanic Cloud. It is located in the constellation Tucana. It was discovered on 1 August 1826 by James Dunlop. It was described by Dreyer as "a globular cluster, very bright, small, a little extended, stars from 13th to 15th magnitude." At an aperture of 31.0 arcseconds, the apparent V-band magnitude is 9.60, but at this wavelength, it also has 0.36 magnitudes of interstellar extinction.

<span class="mw-page-title-main">NGC 361</span> Open star cluster in the Small Magellanic Cloud

NGC 361 is an open cluster in the Small Magellanic Cloud. It is located in the constellation Tucana. It was discovered on September 6, 1826, by James Dunlop. It was described by Dreyer as "very very faint, pretty large, very little extended, very gradually brighter middle." At an aperture of 31.0 arcseconds, its apparent V-band magnitude is 12.24, but at this wavelength, it has 0.40 magnitudes of interstellar extinction.

<span class="mw-page-title-main">NGC 376</span> Globular cluster located in the constellation Tucana

NGC 376 is a young open cluster of stars in the southern constellation of Tucana. It was discovered on September 2, 1826, by Scottish astronomer James Dunlop. Dreyer, a Danish/British astronomer, described it as a "globular cluster, bright, small, round." It is irregular in form, with a central spike.

<span class="mw-page-title-main">NGC 411</span> Globular cluster located in the constellation Tucana

NGC 411 is a globular cluster located approximately 55,000 pc (180,000 ly) from Earth in the constellation Tucana. It was discovered in 1826 by James Dunlop. It was described by Dreyer as "extremely faint, pretty large, round, gradually very little brighter middle". At a distance of about 180,000 light years (55,000 parsecs), it is located within the Small Magellanic Cloud. It has a mass of about 3.0×104 M☉, and a luminosity of about 8.0×104 L☉.

<span class="mw-page-title-main">NGC 416</span> Globular cluster located in the constellation Tucana

NGC 416 is a globular cluster located in the constellation Tucana. It was discovered on September 5, 1826, by James Dunlop. It was described by Dreyer as "faint, pretty small, round, gradually brighter middle". At a distance of about 199,000 ± 9,800 ly (61,000 ± 3,000 pc), it is located within the Small Magellanic Cloud. At an aperture of 31 arcseconds, its apparent V-band magnitude is 11.42, but at this wavelength, it has 0.25 magnitudes of interstellar extinction.

<span class="mw-page-title-main">NGC 419</span> Globular cluster located in the constellation Tucana

NGC 419 is a globular cluster located approximately 57,000 pc (190,000 ly) from Earth in the constellation Tucana. It was discovered on September 2, 1826, by James Dunlop. It was described by Dreyer as "pretty large, pretty bright, round, gradually brighter middle". At a distance of about 186,000 light years, it is located within the Small Magellanic Cloud. At an aperture of 50 arcseconds, its apparent V-band magnitude is 10.30, but at this wavelength, it has 0.15 magnitudes of interstellar extinction.

<span class="mw-page-title-main">NGC 458</span> Open cluster located in the constellation Tucana

NGC 458 is an open cluster located in the constellation Tucana. It was discovered on September 6, 1826, by James Dunlop. It was also observed by John Herschel and DeLisle Stewart. It was described by Dreyer as "pretty faint, large, round, very gradually brighter middle". It was also noted in the second Index Catalogue that it was "probably a cluster, extremely small, close, no nebulosity seen by D.S. ." At an aperture of 31 arcseconds, its apparent V-band magnitude is 11.73, but at this wavelength, it has 0.12 magnitudes of interstellar extinction.

<span class="mw-page-title-main">NGC 1978</span> Globular cluster in the constellation Dorado

NGC 1978 is an elliptical shaped globular cluster or open cluster in the constellation Dorado. It is located within the Large Magellanic Cloud. It was discovered by James Dunlop on November 6, 1826. At an aperture of 50 arcseconds, its apparent V-band magnitude is 10.20, but at this wavelength, it has 0.16 magnitudes of interstellar extinction. It appears 3.9 arcminutes wide. NGC 1978 has a radial velocity of 293.1 ± 0.9 km/s.

References

  1. 1 2 3 4 Rafelski, Marc; Zaritsky, Dennis (2005). "The Star Clusters of the Small Magellanic Cloud: Age Distribution". The Astronomical Journal. 129 (6): 2701–2713. arXiv: astro-ph/0408186 . Bibcode:2005AJ....129.2701R. doi:10.1086/424938. S2CID   4600017.
  2. ↑ Bica, E.; Dutra, C. M. (2000). "Updating the Census of Star Clusters in the Small Magellanic Cloud". The Astronomical Journal. 119 (3): 1214–1224. arXiv: astro-ph/9912386 . Bibcode:2000AJ....119.1214B. doi:10.1086/301277. hdl: 10183/108234 . S2CID   119350474.
  3. 1 2 3 4 Song, Ying-Yi; Mateo, Mario; Bailey, John I.; Walker, Matthew G.; Roederer, Ian U.; Olszewski, Edward W.; Reiter, Megan; Kremin, Anthony (2021). "Dynamical masses and mass-to-light ratios of resolved massive star clusters – II. Results for 26 star clusters in the Magellanic Clouds". Monthly Notices of the Royal Astronomical Society. 504 (3): 4160–4191. arXiv: 2104.06882 . doi: 10.1093/mnras/stab1065 .
  4. ↑ "NGC 152". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2021-02-06.
  5. ↑ "New General Catalog Objects: NGC 150-199" . Retrieved 2016-06-11.


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