Elephant Trunk Nebula
| Globule | |
|---|---|
| Elephant Trunk Nebula / IC 1396A | |
|
|
| False color image of the elephant's trunk in the colors of the classic Hubble pallet with Hα (green), OIII (blue) and SII (red) | |
| Constellation | Cepheus |
|
Position equinox : J2000.0 |
|
| Right ascension | 21h 36m 41.0395s |
| declination | + 57 ° 30 ′ 08.260 ″ |
| Further data | |
| distance | |
| Affiliation | |
| history | |
| Catalog names | |
| IC 1396A • LBN 452 | |
| More information | |
| The position refers to the star HD 239710 (see text) | |
| Aladin previewer | |
The Elephant Trunk Nebula , also known under the catalog name IC 1396A , is a brightly edged globule , i.e. a collection of interstellar gas and dust, in the constellation of Cepheus . The globule belongs to IC 1396 , an H-II region with an embedded star cluster , and is approximately 2400 light years from Earth .
The nebula is an active star formation region and contains a number of young stars and protostars that are only between 100,000 and a million years old.
In front of the globule is the reflection nebula van den Bergh 142 ( vdB 142 ), which is very likely to be physically related. This reflection nebula is illuminated by the B3 star HD 239710 ( BD + 56 ° 2604). The designation vdB 142 is often given for the elephant trunk nebula, but this is incorrect.
| Values for HD 239710 | |
|---|---|
| Right ascension | 21h 36m 41.0395s |
| declination | + 57 ° 30 ′ 08.260 ″ |
| Spectral type | B3V |
| Apparent brightness (B-band) | 9.75 |
| Apparent brightness (visual) | 9.48 |
| other names |
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Web links
- Essay on IC 1396A and vdB 142
- DSS2 image of the globule at Wikisky
- DSS2 image from vdB 142 in the Globule at Wikisky
- Spektrum.de : Amateur recordings [1] [2]
Individual evidence
- ^ WT Reach et al .: Properties of Protostars in the Elephant Trunk in the Globule IC 1396A . In: The Astrophysical Journal , Vol. 690, Issue 1, 2009, pp. N683ff. bibcode : 2009ApJ ... 690..683R
- ^ WT Reach et al .: Protostars in the Elephant Trunk Nebula. In: Bulletin of the American Astronomical Society , Vol. 36, 2004, p. 700. bibcode : 2004AAS ... 204.3309R