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Sunday, November 14, 2010

Melotte 15 - Center of Heart Nebula in HaRGB



The Heart Nebula, IC 1805, Sh2-190, lies some 7500 light years away from Earth and is located in the Perseus arm of the Galaxy in the constellation Cassiopeia. This is an emission nebula showing glowing gas and darker dust lanes. The nebula is formed by plasma of ionized hydrogen and free electrons.

The very brightest part of this nebula (the knot at the right) is separately classified as NGC 896, because it was the first part of this nebula to be discovered.

The nebula's intense red output and its configuration are driven by the radiation emanating from a small group of stars near the nebula's center. This open cluster of stars known as Melotte 15 contains a few bright stars nearly 50 times the mass of our Sun, and many more dim stars that are only a fraction of our Sun's mass. The cluster used to contain a microquasar that was expelled millions of years ago.

Telescope: APM Astrograph 107, f/6.5 with Baader Steeltrack Focuser and 2.5'' TS FF
Mount: NEQ6 Pro with EQ Mod and XBOX Wireless Controller
Camera: ATIK 314L+
Image Scale: 1.91 arcsec/pixel
Filter: Baader Ha 7nm, Baader R,G,B, IDAS LPS
Filter Wheel: Starlight Xpress Motor USB, 7x1.25''
Guide Camera: QHY5 with PHD Guiding and TS UV/IR Block
Guide Scope: Skywatcher Finderscope 8x50
Exp. Time: HaR RGB,Ha: 2h (bin 1x1), R,G,B: 15,15,15 min (bin 2x2)
Calibration Frames: 50 flats in each filter, 50 bias, 6 dark frames
Capture: Nebulosity 2.3.0
Register, Stack: Maxim DL, CCD Stack
Processing: Photoshop CS3
Date: 6 Nov 2010
Location: Athens, GR

Melotte 15 Wiki

Wednesday, November 10, 2010

IC 1795 - North Bear Nebula

IC 1795 - North Bear Nebula in HaRGB



IC 1795 - North Bear Nebula in Ha



IC 1795 is located about 7,500 light years away toward the constellation of Cassiopeia. It is a part of the rich and spectacular nebular complex IC 1805 The Heart Nebula.

Telescope: APM Astrograph 107, f/6.5 with Baader Steeltrack Focuser and 2.5'' TS FF
Mount: NEQ6 Pro with EQ Mod and XBOX Wireless Controller
Camera: ATIK 314L+
Image Scale: 1.91 arcsec/pixel
Filter: Baader Ha 7nm, Baader R,G,B, IDAS LPS
Filter Wheel: Starlight Xpress Motor USB, 7x1.25''
Guide Camera: QHY5 with PHD Guiding and TS UV/IR Block
Guide Scope: Skywatcher Finderscope 8x50
Exp. Time: HaR RGB,Ha: 2h (bin 1x1), R,G,B: 15,15,15 min (bin 2x2)
Calibration Frames: 50 flats in each filter, 50 bias, 6 dark frames
Capture: Nebulosity 2.3.0
Register, Stack: Maxim DL, CCD Stack
Processing: Photoshop CS3
Date: 5 Nov 2010
Location: Athens, GR

IC 1795 - North Bear Nebula Wiki