Hen 3-1475
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Hen 3-1475 Protoplanetary Nebula |
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| Photo from the Hubble Space Telescope . The nodular, S-shaped jet can be clearly seen in the reddish Hα emission . | |
| AladinLite | |
| Constellation | Sagittarius |
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Position equinox : J2000.0 |
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| Right ascension | 17h 45m 14.2s |
| declination | -17 ° 56 ′ 47 ″ |
| Appearance | |
| Central star | |
| Physical data | |
| distance | 18,000 ly |
| history | |
| Catalog names | |
| Hen 3-1475; IRAS 17423-1755 | |
Hen 3-1475 or IRAS 17423-1755 is a pre- planetary nebula that was cataloged by Karl Gordon Henize in 1976. The object is around 18,000 light years from the solar system and is located in the constellation Sagittarius in the northern sky .
The nebula has a special S-shaped shape with a series of nodes, the brightest of which also glows intensely in the X-ray range, as an observation with the Chandra space telescope has shown. A spectroscopic examination with the Spitzer space telescope in the infrared range shows that it is an oxygen-rich star: absorptions of ice and silicate were found, whereas carbon compounds could not be detected.
Web links
Individual evidence
- ↑ http://www.spacetelescope.org/images/heic0308a/
- ^ KG Henize: Observations of southern emission-line stars , bibcode : 1976ApJS ... 30..491H
- ↑ astronews.com
- ↑ Raghvendra Sahai et al .: X-Ray Emission from the Pre-planetary Nebula Henize 3-1475 , bibcode : 2003ApJ ... 599L..87S
- ↑ Manteiga et al .: IRAS 17423-1755 (Hen 3-1475) Revisited: An O-rich High-mass Post-asymptotic Giant Branch Star , bibcode : 2011AJ .... 141 ... 80M