Heart nebula
| Emission nebula | |
|---|---|
| Heart nebula
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| The Heart Nebula (captured by Hunter Wilson) | |
| AladinLite | |
| Constellation | Cassiopeia |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 02 h 25 m 27.8 s |
| declination | + 62 ° 01 ′ 10 ″ |
| Appearance
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| Apparent brightness (visual) | 6.5 mag |
| Angular expansion | 150.0 '× 150.0' |
| Ionizing source | |
| Physical data
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| distance | 7500 ly |
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history
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| discovery | Wilhelm Herschel |
| Date of discovery | November 3, 1787 |
| Catalog names | |
| NGC 896 • IC 1805 • GC 531 • H III 695 • | |
The Heart Nebula is an emission nebula with an open star cluster inside and is located in the constellation Cassiopeia .
Designations
- By far the brightest area of the nebula was discovered first and cataloged as NGC Object 896.
- The open star cluster bears the names "Melotte 15", "Collinder 26", "Raab 11" and IC 1805. The latter is sometimes used for the entire structure.
- The gas mist alone has the designation "Westerhout 4" (W 4).
- The combination of a tightly adjacent slightly smaller emission nebula leads the trivial names "heart and soul nebula" ( "Heart and Soul Nebula ").
The Heart Nebula (right) and the Soul Nebula (left) in infrared .
properties
The object is located about 7,500 light years away from us in the Perseus arm of the Milky Way . The emission nebula of gas clouds and dark areas of dust consists of plasma of ionized hydrogen and free electrons .
The reddish, misty areas are illuminated by the stars of the open star cluster. This group consists of several stars with a total of about 50 times the mass of the Sun and other smaller and less bright stars. The cluster included a small quasar that was ejected millions of years ago.
Web links
- atlasoftheuniverse.com
- IC 1805: The Heart Nebula - Astronomy Picture of the Day of September 11, 2019 (English).
- IC 1805: the Heart Nebula - Astronomy Picture of the Day of February 14, 2009.
- Heart and Soul Nebula - Astronomy Picture of the Day of September 14, 2008.
- Generations of stars in W5 - Astronomy Picture of the Day from August 29, 2008.
- The center of IC 1805 - Astronomy Picture of the Day, July 26, 2008.
- Light from the Heart Nebula - Astronomy Picture of the Day of October 3, 2006 (English).
- The Heart and Soul Nebulas - Astronomy Picture of the Day from August 10, 2005 (English).
- IC 1805: Light from the Heart - Astronomy Picture of the Day of September 17, 2004 (English).
- The Heart and Soul Nebulas - Astronomy Picture of the Day of October 22, 2003.
- Spektrum.de : Amateur recordings [1] [2] [3] [4] [5] [6]
Individual evidence
- ↑ NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b SEDS
- ↑ Seligman
- ↑ Constellation Guide - Heart Nebula. Accessed August 31, 2019 .