NGC 5749

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NGC 5749
Observation data (J2000 epoch)
ConstellationLupus
Right ascension14h 48m 49.(0)s[1]
Declination−54° 30′ 0(7)″[2]
Distance3,548 ly (1,087.9 pc)[1]
Apparent magnitude (V)11.23
Apparent dimensions (V)16.7[1]
Physical characteristics
Mass20.8+24.0
−11.2
 M
[3] M
Radius11.7 ± 2.9 ly (3.6 ± 0.9 pc)[3] (tidal)
Estimated age27.0 Myr[4]
Other designationsNGC 5749, Cr 287, ESO 176-SC 004[5]
See also: Open cluster, List of open clusters

NGC 5749 is an open cluster of stars positioned near the southwest border of the southern constellation of Lupus. It is located at a distance of 3,548 light years from the Sun.[1] This is a poorly populated cluster that shows a low level of concentration;[6] the Trumpler class is IV1p.[7] There are 112 stars brighter than magnitude 14.4 within an angular radius of ~15′ of the cluster center, but only about 30% of these are members.[7] NGC 5749 is 27[4] million years old with a tidal radius of 11.7 light years and a mass of ~21 M.[3] Polarization measurements suggest there is a dust cloud within the cluster.[1]

References[edit]

  1. ^ a b c d e Cantat-Gaudin, T.; Anders, F. (January 2020). "Clusters and mirages: cataloguing stellar aggregates in the Milky Way". Astronomy & Astrophysics. 633: 22. arXiv:1911.07075. Bibcode:2020A&A...633A..99C. doi:10.1051/0004-6361/201936691. A99.
  2. ^ "NASA/IPAC Extragalactic Database". Results for NGC 5749. Retrieved 2007-04-06.
  3. ^ a b c Piskunov, A. E.; et al. (January 2008). "Tidal radii and masses of open clusters". Astronomy and Astrophysics. 477 (1): 165–172. Bibcode:2008A&A...477..165P. doi:10.1051/0004-6361:20078525.
  4. ^ a b Medhi, Biman J.; Tamura, Motohide (April 2013). "Cluster membership probability: polarimetric approach". Monthly Notices of the Royal Astronomical Society. 430 (2): 1334–1343. arXiv:1212.6840. Bibcode:2013MNRAS.430.1334M. doi:10.1093/mnras/sts714.
  5. ^ "NGC 5749". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-12-28.
  6. ^ Vergne, M. M.; et al. (February 2007). "Optical multicolor polarization observations in the region of the open cluster NGC 5749". Astronomy and Astrophysics. 462 (2): 621–626. Bibcode:2007A&A...462..621V. doi:10.1051/0004-6361:20042124.
  7. ^ a b Claria, Juan J.; Lapasset, E. (October 1992). "New Color-Magnitude Diagrams and Basic Parameters of the Open Cluster NGC 5749". Acta Astronomica. 42: 343–353. Bibcode:1992AcA....42..343C.

External links[edit]

Coordinates: Sky map 14h 48m 54s, −54° 29′ 52″