NGC 2527

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NGC 2527
NGC 2527.png
Observation data (J2000 epoch)
Constellation Puppis
Right ascension 08h 04m 58s [1]
Declination −28° 08′ 48″ [1]
Distance 1,960 ly (601 pc [2] )
Apparent magnitude (V)6.5 [1]
Apparent dimensions (V)20'
Physical characteristics
Mass740 [3]   M☉
Estimated age445 million years [2]
810 million years [4]
Other designationsNGC 2520, Cr 174
See also: Open cluster, List of open clusters

NGC 2527 (also catalogued as NGC 2520) is an open cluster in the constellation Puppis. It was discovered by William Herschel on December 9, 1784. The cluster was also observed by John Herschel on January 7, 1831. He also observed it on February 5, 1837, identifying it as a different object, which was catalogued as NGC 2520. It is a poor cluster and with no central concentration, with Trumpler class III1p. [5]

The core radius of the cluster is 1 parsec (3.3 light years), while the tidal radius is 5.1 parsecs (17 light years) and represents the average outer limit of NGC 2527, beyond which a star is unlikely to remain gravitationally bound to the cluster core. [4] 37 stars, probable members of the cluster, are located within the central part of the cluster and 96 probable members are located within the angular radius of the cluster. [4] The brightest star members are A-type stars, with the brightest being an A3 star with magnitude 9.38. [6] In the cluster has been detected one white dwarf, with mass 0.77±0.03 M☉. Its age is estimated to be 441±188 years and the progenitor star has initial mass circa 3.1 M☉. [7] The turn-off mass of the cluster is at 2.8 M☉. The metallicity of the cluster is -0.01, similar to the solar one. [8]

The location of NGC 2527 in the sky NGC 2527 map.png
The location of NGC 2527 in the sky

NGC 2527 lies 3.8 degrees south of Rho Puppis and can be seen with 50mm binoculars as a moderately large, bright patch of haze, with no stars visible with direct vision. [9]

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NGC 2539 Open cluster in the constellation Puppis

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IC 2395

IC 2395 is an open cluster in the constellation Vela.

NGC 5662 is an open cluster in the constellation Centaurus. It was discovered by Nicolas Louis de Lacaille on May 17, 1752 from South Africa. James Dunlop observed it on July 10, 1826 from Parramatta, Australia and added it to his catalog as No. 342.

NGC 3228

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NGC 5460 Open cluster in Centaurus

NGC 5460 is an open cluster in the constellation Centaurus. It is a bright but loose cluster of intermediate age located approximately 2,300 light years away from Earth. It is located nearly 2 degrees east-southeast of Zeta Centauri.

NGC 5617 Open cluster in Centaurus

NGC 5617 is an open cluster in the constellation Centaurus. NGC 5617 forms a binary open cluster with Trumpler 22. It lies one degree west-northwest of Alpha Centauri.

NGC 5316 Open cluster in Centaurus

NGC 5316 is an open cluster in the constellation Centaurus. It was discovered by James Dunlop in 1826. Located approximately 4,000 light years away from Earth, it is located in the Carina-Sagittarius arm.

NGC 4349

NGC 4349 is an open cluster in the constellation Crux. It was discovered by James Dunlop in 1826. It is located approximately 7,000 light years away from Earth.

NGC 4103

NGC 4103 is an open cluster in the constellation Crux. It was discovered by James Dunlop in 1826. It is located approximately 5,000 light years away from Earth, in the Carina-Sagittarius arm.

IC 2714 is an open cluster in the constellation Carina. It was discovered by James Dunlop in 1826. It is located approximately 4,000 light years away from Earth, in the Carina–Sagittarius Arm.

NGC 7160

NGC 7160 is an open cluster in the constellation Cepheus. It was discovered by William Herschel on November 9, 1789. The cluster was also observed by John Herschel on October 7, 1829. It is a poor cluster and with little central concentration, with Trumpler class II3p. It is part of the stellar association Cepheus OB2, located one degree south-southwest of VV Cephei.

NGC 6910 Open cluster in the constellation Cygnus

NGC 6910 is an open cluster in the constellation Cygnus. It was discovered by William Herschel on October 17, 1786. The cluster was also observed by John Herschel on September 18, 1828. It is a poor cluster and with prominent central concentration, with Trumpler class I2p. NGC 6910 is the core cluster of the stellar association Cygnus OB9.

References

  1. 1 2 3 "NGC 2527". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2015-06-19.
  2. 1 2 WEBDA: NGC 2527
  3. ↑ Piskunov, A. E.; Schilbach, E.; Kharchenko, N. V.; Röser, S.; Scholz, R.-D. (6 November 2007). "Tidal radii and masses of open clusters". Astronomy & Astrophysics. 477 (1): 165–172. Bibcode:2008A&A...477..165P. doi: 10.1051/0004-6361:20078525 .
  4. 1 2 3 Kharchenko, N. V.; Piskunov, A. E.; Schilbach, E.; Röser, S.; Scholz, R.-D. (3 October 2013). "Global survey of star clusters in the Milky Way". Astronomy & Astrophysics. 558: A53. arXiv: 1308.5822 . Bibcode:2013A&A...558A..53K. doi:10.1051/0004-6361/201322302. S2CID   118548517.
  5. ↑ Seligman, Courtney. "NGC 2520 (= NGC 2527 = OCL 685)". Celestial Atlas. Retrieved 19 November 2018.
  6. ↑ Lindoff, U (February 1973). "The open cluster NGC 2527". Astronomy and Astrophysics Supplement. 9: 299. Bibcode:1973A&AS....9..229L.
  7. ↑ Raddi, R.; Catalán, S.; Gänsicke, B. T.; Hermes, J. J.; Napiwotzki, R.; Koester, D.; Tremblay, P.-E.; Barentsen, G.; Farnhill, H. J.; Mohr-Smith, M.; Drew, J. E.; Groot, P. J.; Guzman-Ramirez, L.; Parker, Q. A.; Steeghs, D.; Zijlstra, A. (6 February 2016). "A search for white dwarfs in the Galactic plane: the field and the open cluster population". Monthly Notices of the Royal Astronomical Society. 457 (2): 1988–2004. arXiv: 1601.02019 . Bibcode:2016MNRAS.457.1988R. doi:10.1093/mnras/stw042. S2CID   587170.
  8. ↑ Reddy, A. B. S.; Giridhar, S.; Lambert, D. L. (11 April 2013). "Comprehensive abundance analysis of red giants in the open clusters NGC 2527, 2682, 2482, 2539, 2335, 2251 and 2266". Monthly Notices of the Royal Astronomical Society. 431 (4): 3338–3348. arXiv: 1303.1104 . Bibcode:2013MNRAS.431.3338R. doi:10.1093/mnras/stt412. S2CID   119191372.
  9. ↑ Thompson, Robert Bruce; Thompson, Barbara Fritchman (2007). Illustrated Guide to Astronomical Wonders: From Novice to Master Observer. Maker Media, Inc. p. 184. ISBN   9781680451917.


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