NGC 6210
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Planetary Nebula NGC 6210 |
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| Photo from the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Hercules |
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Position equinox : J2000.0 |
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| Right ascension | 16h 44m 29.5s |
| declination | + 23 ° 47 ′ 59 ″ |
| Appearance | |
| Apparent brightness (visual) | 8.8 likes |
| Apparent brightness (B-band) | 9.3 mag |
| Angular expansion | 0.35 ′ × 0.35 ′ |
| Central star | |
| designation | HD 151121 |
| Apparent brightness | 12.9 mag |
| Physical data | |
| Redshift | (+47 ± 117) · 10 -6 |
| Radial velocity | +14 ± 35 km / s |
| distance | 6500 ly |
| diameter | 0.5 ly |
| history | |
| discovery | Wilhelm Struve |
| Date of discovery | 1825 |
| Catalog names | |
| NGC 6210 • PK 43 + 37.1 • GC 4235 • h 1970 • CS = 12.9 • Struve 5 • Lalande 30510 | |
NGC 6210 is the name of a planetary nebula in the constellation Hercules . NGC 6210 has an angular extent of 0.5 '× 0.47' and a magnitude of 8.8 mag. Its very bright central star, a white dwarf , shines with an apparent magnitude of 12.9 mag. The distance is estimated to be 6,500 light years , from which the apparent size results in an extension of about 0.5 light years.
The object was discovered in 1825 by the German astronomer Friedrich Georg Wilhelm Struve .
description
The "Tortoise" - Turtle Nebula - NGC 6210 in Hercules is a very bright planetary nebula with a central star that is clearly visible in photographs. The expelled gas clouds have an intense bluish turquoise glow, which is caused by the dominant spectral lines of the single (blue) and double (turquoise) ionized oxygen. High-resolution images with the HST show that the central star ejects 4 jets of very hot gas into the older and therefore cooler gas envelope. These protrude as little "feet" from the gas envelope, which gives the fog the appearance of a swimming turtle.
"Turtle Nebula" NGC 6210, recorded with a ToUcam on a 14 "SCT with 1.2 m focal length
Hubble image with surrounding gas cloud
Visual observation
In the 15 mm eyepiece on the C14, NGC 6210 is immediately noticeable as a bright, bluish-turquoise ball. Structures cannot be made out at a magnification of 260 times, but the central star can sometimes be seen vaguely.
Web links
- Hubble Space Telescope
- GoBlack
- NGC 6210: The "Turtle in Space" Planetary Nebula - Astronomy Picture of the Day of October 28, 1998 (English).
- NOAO
- astronews.com: Picture of the day , February 24, 2012
- Spektrum .de: amateur recordings [1]