NGC 7662 is a planetary nebula located in the northern constellation Andromeda. It is known as the Blue Snowball Nebula, Snowball Nebula, and Caldwell 22. The object has an apparent visual magnitude of 8.3 and spans an angular size of 32″ × 28″. Parallax measurements give a distance estimate of 5,730 ± 340 ly.
This nebula has an elliptical shape with a triple-shell structure. The brightest is the main shell, which spans 12″ × 18″. This is surrounded by a fainter outer shell, which has an elliptical form. Both shells are enclosed by a faint, circular halo, some 134″ in diameter. Several knots and a jet-like structure are visible, which display emission lines and low ionization. Based on the expansion rate, the estimated age of the nebula is 3,080 years.
The central star of the planetary nebula is a subdwarf O star with a spectral type of sdO. The best fit model for this star gives an effective temperature of 100 kK, with 5,250 times the luminosity of the Sun and 60.5% of the Sun’s mass. X-ray emission from the nebula is being generated by the stellar wind from this star striking previously ejected matter.
NGC 7662
NGC 7662 is a planetary nebula located in the northern constellation Andromeda. It is known as the Blue Snowball Nebula, Snowball Nebula, and Caldwell 22. The object has an apparent visual magnitude of 8.3 and spans an angular size of 32″ × 28″. Parallax measurements give a distance estimate of 5,730 ± 340 ly.
This nebula has an elliptical shape with a triple-shell structure. The brightest is the main shell, which spans 12″ × 18″. This is surrounded by a fainter outer shell, which has an elliptical form. Both shells are enclosed by a faint, circular halo, some 134″ in diameter. Several knots and a jet-like structure are visible, which display emission lines and low ionization. Based on the expansion rate, the estimated age of the nebula is 3,080 years.
The central star of the planetary nebula is a subdwarf O star with a spectral type of sdO. The best fit model for this star gives an effective temperature of 100 kK, with 5,250 times the luminosity of the Sun and 60.5% of the Sun’s mass. X-ray emission from the nebula is being generated by the stellar wind from this star striking previously ejected matter.
Photographed with APO107 refractor telescope and Nikon D800 DSLR camera in Stuvsta, September 2016. Exposure was 7*60s at ISO800.
NGC 7662
NGC 7662 is a planetary nebula located in the northern constellation Andromeda. It is known as the Blue Snowball Nebula, Snowball Nebula, and Caldwell 22. The object has an apparent visual magnitude of 8.3 and spans an angular size of 32″ × 28″. Parallax measurements give a distance estimate of 5,730 ± 340 ly.
This nebula has an elliptical shape with a triple-shell structure. The brightest is the main shell, which spans 12″ × 18″. This is surrounded by a fainter outer shell, which has an elliptical form. Both shells are enclosed by a faint, circular halo, some 134″ in diameter. Several knots and a jet-like structure are visible, which display emission lines and low ionization. Based on the expansion rate, the estimated age of the nebula is 3,080 years.
The central star of the planetary nebula is a subdwarf O star with a spectral type of sdO. The best fit model for this star gives an effective temperature of 100 kK, with 5,250 times the luminosity of the Sun and 60.5% of the Sun’s mass. X-ray emission from the nebula is being generated by the stellar wind from this star striking previously ejected matter.
Photographed with APO107 refractor telescope and Nikon D800 DSLR camera in Stuvsta, September 2016. Exposure was 7*60s at ISO800.
NGC 7662, Snowball nebula
Photographed with the RC8″ reflector telescope and the ASI 2600MC color CMOS camera in Stuvsta, September 5th, 2024. Exposure was 40 *2 min with IDAS LPS P3 light pollution filter. Post-processing in Pixinsight with Blur Xterminator.
NGC 7662, Snowball nebula
Photographed with the RC8″ reflector telescope and the ASI 2600MC color CMOS camera in Stuvsta, September 5th, 2024. Exposure was 40 *2 min with IDAS LPS P3 light pollution filter. Post-processing in Pixinsight with Blur Xterminator.
NGC 7662, Snowball nebula
Photographed with the RC8″ reflector telescope and the ASI 2600MC color CMOS camera in Stuvsta, September 5th, 2024. Exposure was 40 *2 min with IDAS LPS P3 light pollution filter. Post-processing in Pixinsight with Blur Xterminator.
