astro.wikisort.org - GalaxyNGC 5315 is a planetary nebula in the southern constellation Circinus. Of apparent magnitude 9.8 around a central star of magnitude 14.2, it is located 5.2 degrees west-southwest of Alpha Circini. It is only visible as a disc at magnifications over 200-fold.[5] The nebula was discovered by astronomer Ralph Copeland in 1883.[3] The central star has a stellar class of WC4 and is hydrogen deficient with an effective temperature of 76-79 kK.[6] The distance to this nebula is not known accurately, but is estimated to be around 6.5 kilolight-years.[2]
Planetary nebula in the constellation Circinus
NGC 5315Emission nebula |
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Right ascension | 13h 53m 56.96097s[1] |
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Declination | −66° 30′ 50.9155″[1] |
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Distance | ~6.5 kly (2 kpc).[2] ly |
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Apparent magnitude (V) | 9.8[3] |
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Constellation | Circinus |
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Designations | ESO 97-9, HD 120800, NGC 5315, PN G309.1-04.3[4] |
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See also: Lists of nebulae |
This planetary nebular has a slightly elliptical form, a complex structure, and a ring that is somewhat broken. It shows a typical abundance of carbon and a slightly enhanced nitrogen abundance.[2] Radial velocity studies indicate that the star may be a member of a binary system. The nebula does not show enrichment of s-process elements. This suggests that the star's asymptotic giant branch stage may have been truncated by interaction with the companion. Alternatively, the star may be low in mass and did not undergo third dredge-up, or the star's s-process elements were heavily diluted by the envelope during the AGB phase.[6]
References
External links
Circinus constellation |
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Stars (list) | Bayer | |
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Variable | |
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HR |
- 5194
- 5218
- 5242
- 5253
- 5293
- 5295
- 5320
- 5379
- 5382
- 5391
- 5408
- 5443
- 5465
- 5482
- 5486
- 5515
- 5546
- 5623
- 5632
- 5645
- 5661
- 5680
- 5700
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HD |
- 129092
- 129445
- 130021
- 130942
- 131491
- 133557
- 134657
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Other | |
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Star clusters | |
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Nebulae | |
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Galaxies | |
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На других языках
[de] NGC 5315
NGC 5315 ist ein planetarischer Nebel im Sternbild Zirkel und hat eine Winkelausdehnung von 0,23' und eine scheinbare Helligkeit von 9,8 mag.
- [en] NGC 5315
[ru] NGC 5315
NGC 5315 (другие обозначения — PK 309-4.2, ESO 97-PN9) — планетарная туманность в созвездии Циркуль.
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