Astronomy:NGC 6309
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Short description: Planetary nebula in the constellation of Ophiuchus
| Emission nebula | |
|---|---|
| Planetary nebula | |
 NGC 6309 as seen through the Hubble Space Telescope | |
| Observation data: J2000 epoch | |
| Right ascension | 17h 14m 04.3s[1] |
| Declination | −12° 54′ 38″[1] |
| Apparent magnitude (V) | 11.5[2] |
| Apparent dimensions (V) | 0.32′[2] |
| Constellation | Ophiuchus |
| Designations | PK 9+14.1, HD 155752, Box Nebula[3] |
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 that 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 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 square-like shape of the nebula gives it the nickname "Box Nebula".
The central star of the planetary nebula is an O-type star with a spectral type of O(He).[7]
See also
References
- ↑ 1.0 1.1 1.2 "Object No. 1 - NGC 6309". NASA/IPAC. http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=NGC+6309&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES.
- ↑ 2.0 2.1 2.2 "Revised NGC Data for NGC 6309". http://spider.seds.org/ngc/revngcic.cgi?NGC6309.
- ↑ "NGC 6309". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+6309.
- ↑ Seligman, Courtney. "NGC 6309, the Box Nebula". http://cseligman.com/text/atlas/ngc63.htm#6309.
- ↑ "NGC 6309". http://stars.astro.illinois.edu/sow/n6309.html.
- ↑ 6.0 6.1 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. doi:10.1093/mnras/stu2201. Bibcode: 2015MNRAS.446.1931R.
- ↑ 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. doi:10.1051/0004-6361/202141916. Bibcode: 2021A&A...656A..51G.
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