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NGC 6309, also known as the Box Nebula, is a planetary nebula located in the constellation Ophiuchus. It was discovered by the German astronomer Wilhelm Tempel in 1876.[4] It has a luminosity of about 1800 times of the Sun.[1][2][5] The distance to this nebula is not well known, but it is assumed to be about 6,500 light-years or 2,000 parsecs.[6]

NGC 6309
Emission nebula
Planetary nebula
NGC 6309 as seen through the Hubble Space Telescope
Observation data: J2000 epoch
Right ascension17h 14m 04.3s[1]
Declination−12° 54′ 38″[1]
Apparent magnitude (V)11.5[2]
Apparent dimensions (V)0.32′[2]
ConstellationOphiuchus
DesignationsPK 9+14.1, HD 155752, Box Nebula[3]
See also: Lists of nebulae

NGC 6309 is a quadrupolar nebula, with two pairs of lobes. Surrounding the pair is a spherical shell. The spherical shell formed before the four lobes.[6]

The central star of the planetary nebula is an O-type star with a spectral type of O(He).[7]


See also



References


  1. "Object No. 1 - NGC 6309". NASA/IPAC extragalactic database. NASA/IPAC. Retrieved 4 October 2015.
  2. "Revised NGC Data for NGC 6309". Seds. Retrieved 4 October 2015.
  3. "NGC 6309". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-03-21.
  4. Seligman, Courtney. "NGC 6309, the Box Nebula". cseligman.com. Retrieved 4 October 2015.
  5. "NGC 6309". Illinois.edu. Retrieved 4 October 2015.
  6. Rubio, G.; Vázquez, R.; Ramos-Larios, G.; Guerrero, M. A.; Olguín, L.; Guillén, P. F.; Mata, H. (2015). "NGC 6309, a planetary nebula that shifted from round to multipolar". Monthly Notices of the Royal Astronomical Society. 446 (2): 1931–1938. arXiv:1410.7060. Bibcode:2015MNRAS.446.1931R. doi:10.1093/mnras/stu2201.
  7. González-Santamaría, I.; Manteiga, M.; Manchado, A.; Ulla, A.; Dafonte, C.; López Varela, P. (2021). "Planetary nebulae in Gaia EDR3: Central star identification, properties, and binarity". Astronomy & Astrophysics. 656: A51. arXiv:2109.12114. Bibcode:2021A&A...656A..51G. doi:10.1051/0004-6361/202141916. S2CID 237940344.



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[de] NGC 6309

NGC 6309 (andere Bezeichnung PK 9+14.1) ist ein planetarischer Nebel im Sternbild Schlangenträger in der Nähe des Himmelsäquators. Er ist ungefähr 6500 Lichtjahre von der Sonne entfernt, hat einen Umfang von etwa 0,6 Lichtjahren und expandiert mit ca. 25 Kilometern pro Sekunde. Sein Alter wird auf 3700 bis 4000 Jahre geschätzt.[3]
- [en] NGC 6309

[ru] NGC 6309

NGC 6309 (другое обозначение — PK 9+14.1) — планетарная туманность в созвездии Змееносец.


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