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Antares and Rho Ophiuchi

Click to enlarge.
Click to enlarge.

Date: 20 April 2018, Tivoli Astro-farm, Khomas, Namibia

Telescope: Skywatcher Esprit ED 120 mm f/7 apochromat, mount: AP-1200 GTO, camera: Apogee U16M, CCD-temperature -17 C, LRGB, L: 8x6min; R: 8x6min; G: 8x6min; B: 8x6min, CCD-temp = -17 C.

Eta Carinae in RGB

Eta Carinae
Eta Carinae Nebula. Six minutes sub-exposures in RGB. No luminance. Field of view 2.5 x 2.5 degrees.

The rainy season has finally ended here in Khomas, Namibia. This provided an oppurtunity to complete the RGB sub-exposures of the Eta Carinae Nebula.

 

Date: 18-19 April 2018, Tivoli Astro-farm, Khomas, Namibia

Telescope: Skywatcher Esprit ED 120 mm f/7 apochromat, mount: AP-1200 GTO, camera: Apogee U16M, CCD-temperature -17 C, RGB, R: 6x6min; G: 6x6min; B: 6x6min, CCD-temp = -17C.

The Solar System compared to the Heart Nebula

Heart Nebula
MaximDL user interface during an H-alpha exposure of the Heart Nebula. This image is exposed only 15-minutes at f/7.

How many pixels would make up our solar system on this image of the center of the Heart Nebula?

Answer: only 0.014 pixel !

  

Numbers used

Neptune's orbit is 499 light minutes  in diameter. The camera has an image area of 4000 x 4000 pixels. The Heart Nebula's width, 200 light years, makes up approximately 3000 pixels across the original image, of which the image above is only a detail. One light year is then 15 pixels, so 499 light minutes is 0.014 pixel.

Young Cluster Melotte 15

Melotte 15
The young star cluster Melotte 15 was born of hydrogen, helium and heavier elements in the clouds of the Heart Nebula.

The Heart Nebula, like most emission nebulas, is inflated like a bubble by newborn stars in its interior. The ionized gasses are mostly hydrogen, but are also rich in oxygen (blue) and sulphur (red), as well as all of the heavier elements fused in the cores of several generations of stars long dead. The ionized gasses are eroded by stellar winds and radiation from massive hot stars in the young star cluster Melotte 15, left of center,  formed only 1.5 million years ago.

 

Date: 6 January 2018 and 16 December 2017, Location: Rennesøy, SW Norway

Telescope: Skywatcher Esprit ED 120 mm f/7 apochromat, Mount: ASA DDM160

Camera: Apogee U16M, CCD temperature -30 C

Exposure time: Ha, OIII, SII 180/100/80 min

IC 1805 Heart Nebula

Narrow-band image of IC 1805. North is down. 

 

Date: 16 December 2017 

Location: Isle of Rennes, SW Norway

Telescope: Skywatcher Esprit ED 120 mm f/7 apochromat

Mount: ASA DDM160

Camera: Apogee U16M, CCD temperature -30 C

Exposure time: Ha, OIII, SII 50/40/20 min

IC1805 posisjon
The Heart Nebula's (IC1805) location in the Perseus Arm, which is one of two large spiral arms of the Milky Way. The distance from the Sun to IC1805 is around 7500 light years. Illustration: SkySafari 6