NGC 6210

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 brightness of 8.8 mag. Its pretty bright central star, a white dwarf, glows with an apparent magnitude of 12.9 mag. The distance is estimated to be 6,500 light-years, resulting in an extension of approximately 0.5 light years from the apparent size. NGC 6210 was discovered in 1825 by the German astronomer Friedrich Georg Wilhelm Struve.

Description

The "turtle" - Turtle Nebula - NGC 6210 in Hercules is a very bright planetary nebula with a photographically highly visible central star. The cast-off gas clouds shining intensely bluish turquoise, which is caused by the dominant spectral lines of the basic ( blue) and double (turquoise) ionized oxygen. High definition images with the HST show that the central star emits four jets of very hot gas in the elderly and thus cooler gas envelope. These stand out as little "feet " something from the gas envelope out, giving the appearance of a mist floating aquatic turtle.

Hubble image with surrounding gas cloud

Visual observation

The 15mm eyepiece on C14 NGC 6210 falls as a bright, bluish - turquoise beads immediately. Structures are not make out with a 260- fold magnification, however, the central star is sometimes seen in passing.