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NGC 2509 is an open cluster in the constellation of Puppis. It was discovered on 3 December 1783 by William Herschel.[3] It was described as "bright, pretty rich, slightly compressed" by John Louis Emil Dreyer, the compiler of the New General Catalogue.[3]
| NGC 2509 | |
|---|---|
 DSS image of NGC 2509 | |
| Observation data (J2000 epoch) | |
| Constellation | Puppis |
| Right ascension | 08h 00m 48s[1] |
| Declination | −19° 03′ 06″[1] |
| Distance | 9,500 ly (2,900 pc[1]) |
| Apparent magnitude (V) | 9.3[2] |
| Apparent dimensions (V) | 2.5 ± 0.5′ |
| Physical characteristics | |
| Estimated age | 1,200 Myr[1] |
| Other designations | NGC 2509, Cr 171, Mel 81, OCl 630[2] |
The cluster is about 14 light-years (4.2 parsecs) wide,[1] but the cluster's other parameters remain poorly known. Some studies have estimated a distance of about 9,500 light-years (2,900 parsecs) away from the Solar System,[1] while older estimates put it at only 2980 light-years (912 parsecs) away.[4] Estimates of the cluster's age have also varied significantly, from 1.2 billion years old[1] to 8 billion years old.[4] The latest analysis based on the parallaxes measured by the Gaia spacecraft confirms that it is a relatively distant object, with a distance between 2500 and 3000 parsecs.[5]
References
- Carraro, G.; Costa, E. (2007). "Photometry of the five marginally studied open clusters Collinder 74, Berkeley 27, Haffner 8, NGC 2509, and VdB-Hagen 4". Astronomy & Astrophysics. 464 (2): 573. arXiv:astro-ph/0611705. Bibcode:2007A&A...464..573C. doi:10.1051/0004-6361:20066350.
- "NGC 2509". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 9 August 2017.
- "New General Catalog Objects: NGC 2500 - 2549". cseligman.com. Retrieved 9 August 2017.
- Sujatha, S.; Babu, G. S. D. (2003). "Study of open cluster NGC 2509". Bulletin of the Astronomical Society of India. 31: 9–18. Bibcode:2003BASI...31....9S.
- Cantat-Gaudin, T.; Jordi, C.; Vallenari, A.; et al. (2018). "A Gaia DR2 view of the open cluster population in the Milky Way". Astronomy & Astrophysics. 618. arXiv:1805.08726. Bibcode:2018A&A...618A..93C. doi:10.1051/0004-6361/201833476.
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На других языках
[de] NGC 2509
NGC 2509 ist ein offener Sternhaufen im Sternbild Puppis und wurde am 3. Dezember 1783 von William Herschel entdeckt. NGC 2509 wurde von Johan Ludvig Emil Dreyer, als "Cluster, hell, ziemlich reich, leicht komprimiert, kleine Sterne" beschrieben.[4]- [en] NGC 2509
[ru] NGC 2509
NGC 2509 (другие обозначения — OCL 630, ESO 561-SC7) — рассеянное скопление в созвездии Кормы[1]. Открыто Уильямом Гершелем в 1783 году[2].Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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