NGC 5749

NGC 5749
NGC 5749 with DECaPS
Observation data (J2000 epoch)
Right ascension14h 48m 49.(0)s
Declination−54° 30′ 0(7)″
Distance3,548 ly (1,087.9 pc)
Apparent magnitude (V)11.23
Apparent dimensions (V)16.7′
Physical characteristics
Mass20.8+24.0
−11.2 M☉ M☉
Radius11.7 ± 2.9 ly (3.6 ± 0.9 pc) (tidal)
Estimated age27.0 Myr
Other designationsNGC 5749, Cr 287, ESO 176-SC 004
Associations
ConstellationLupus
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. This is a poorly populated cluster that shows a low level of concentration; the Trumpler class is IV1p. 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. NGC 5749 is 27 million years old with a tidal radius of 11.7 light years and a mass of ~21 M☉. Polarization measurements suggest there is a dust cloud within the cluster.

References

  1. 1 2 3 4 5 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. S2CID 208138247. A99.
  2. ↑ "NASA/IPAC Extragalactic Database". Results for NGC 5749. Retrieved 2007-04-06.
  3. 1 2 3 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. 1 2 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. hdl:11336/44582.
  7. 1 2 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.