Astronomy:Heart Nebula
| Emission nebula | |
|---|---|
| H II region | |
 Heart Nebula, with Fish Head Nebula on top right corner, narrowband image captured on a 70mm scope | |
| Observation data: J2000.0 epoch | |
| Right ascension | 02h 33m 22s |
| Declination | +61° 26′ 36″ |
| Distance | 7,500 ly |
| Apparent magnitude (V) | 18.3 |
| Apparent dimensions (V) | 150' x 150' |
| Constellation | Cassiopeia |
| Physical characteristics | |
| Radius | 165 ly |
| Absolute magnitude (V) | 6.5 |
| Designations | NGC 896, IC1805, Sh2-190 |
The Heart Nebula (also known as the Running dog nebula, IC 1805, Sharpless 2-190) is an emission nebula, 7500 light years away from Earth and located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. It was discovered by William Herschel on 3 November 1787.[1] It displays glowing ionized hydrogen gas and darker dust lanes.[2]
The brightest part of the nebula (a knot at its western edge) is separately classified as NGC 896, because it was the first part of the nebula to be discovered. The nebula's intense red output and its morphology are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars, known as Collinder 26 or Melotte 15, contains a few bright stars nearly 50 times the mass of the Sun, and many more dim stars that are only a fraction of the Sun's mass.[1]
The Heart Nebula is also made up of ionised oxygen and sulfur gasses, responsible for the rich blue and orange colours seen in narrowband images. The shape of the nebula is driven by stellar winds from the hot stars in its core. The nebula also spans almost 2 degrees in the sky, covering an area four times that of the diameter of the full moon.[3]
Gallery
Heart Nebula captured on an ASI2600mc-pro with a Triad Narrowband Filter
Heart Nebula and Soul Nebula are part of a large chimney cloud complex
Melotte 15 is part of Heart Nebula. There are several bright stars here, some of them nearly 50 times mass of the Sun. Telescope: 14" SCT Imager: Raman Madhira from Ray's Astrophotography Observatory; Postprocessing with PixInsight. Imaged on 2022-09-21
Captured from Manchester September 2022 Bortle class 8 sky
See also
- Soul Nebula
- List of NGC objects (1–1000)
References
- ↑ 1.0 1.1 "New General Catalog Objects: NGC 850 - 899" (in en-US). http://cseligman.com/text/atlas/ngc8a.htm#896.
- ↑ "astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm". http://www.astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm.
- ↑ "The Heart Nebula in Hydrogen, Oxygen, and Sulfur | Science Mission Directorate". https://science.nasa.gov/heart-nebula-hydrogen-oxygen-and-sulfur.
External links
- Heart Nebula Data download & Processing Guide
- Heart Nebula at Atlas of the Universe
- NASA Astronomy Picture of the Day: Heart Nebula (14 February 2009)
Coordinates: 
02h 33m 00s, +61° 27′ 00″
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