IRAS 19475 + 3119
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Pre-planetary nebula IRAS 19475 + 3119 |
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | swan |
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Position equinox : J2000.0 |
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| Right ascension | 19h 49m 29.5627s |
| declination | + 31 ° 27 ′ 16.221 ″ |
| Appearance | |
| Angular expansion | 10.5 "× 4.7" |
| Central star | |
| designation | HD 331319 |
| Physical data | |
| distance | 15,000 ly |
| history | |
| Catalog names | |
IRAS 19475 + 3119 is a pre- planetary nebula in the constellation Swan , about 15,000 light years away. Observation at 0.43 and 0.6 μm with the Hubble Space Telescope shows a quadrupolar structure.
The central star originally had 2.5 solar masses , after the formation of the nebula, 0.63 solar masses remain. With 8,300 times the luminosity of the sun, its distance is estimated to be 4.9 kpc and the diameter to be 58 times that of the sun.
Web links
- astronews.com: Picture of the day
Individual evidence
- ^ Simbad Database
- ↑ a b c Raghvendra Sahai et al .: A Quadrupolar Preplanetary Nebula: IRAS 19475 + 3119 , The Astrophysical Journal, Volume 658, Issue 1, pp. 410-422.
- ↑ ESA / Hubble, NASA: A Dying Star Starts Shedding its Skin
- ↑ Ming-Chien Hsu, Chin-Fei Lee: An Envelope Disrupted by a Quadrupolar Outflow in the Pre-Planetary Nebula IRAS19475 + 3119 , arxiv : 1105.2410 .