IC 418
IC 418, also known as Spirograph Nebula, is a planetary nebula located in the constellation of Lepus about 3,600 ly away. It spans 0.3 light-years across.
| Emission nebula | |
|---|---|
| Planetary nebula | |
 | |
| Observation data: J2000 epoch | |
| Right ascension | 05h 27m 28.2037s[1] |
| Declination | −12° 41′ 50.265″[1] |
| Distance | 3.6 ± 1.0 kly (1100 ± 300 pc)[2] ly |
| Apparent magnitude (V) | 9.6[1] |
| Apparent dimensions (V) | 3.5″x5.5"/11"x14"/150"/220"x250"[3] |
| Constellation | Lepus |
| Physical characteristics | |
| Radius | 0.15 ly |
| Absolute magnitude (V) | - |
| Notable features | - |
| Designations | Spirograph Nebula |
The name derives from the intricate pattern of the nebula, which resembles a pattern which can be created using the Spirograph, a toy that produces geometric patterns (specifically, hypotrochoids and epitrochoids) on paper.
The central star of the planetary nebula, HD 35914, is an O-type star with a spectral type of O7fp.[4]
References
- "IC 418". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2006-12-22.
- Guzmán, Lizette; Loinard, Laurent; Gómez, Yolanda; Morisset, Christophe (2009). "Expansion Parallax of the Planetary Nebula IC 418". The Astronomical Journal. 138 (1): 46–49. arXiv:0905.0021. Bibcode:2009AJ....138...46G. doi:10.1088/0004-6256/138/1/46. S2CID 17714722.
- Ramos-Larios, G.; et al. (2012). "Discovery of multiple shells around the planetary nebula IC 418". Monthly Notices of the Royal Astronomical Society. 423 (4): 3753–3760. arXiv:1204.5816. Bibcode:2012MNRAS.423.3753R. doi:10.1111/j.1365-2966.2012.21165.x. S2CID 118442646.
- 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.
External links
Media related to IC 418 at Wikimedia Commons- The Spirograph Nebula (IC 418) - STScI Press Release
- Astronomy Picture of the Day - IC 418: The Spirograph Nebula - 2010 April 11
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