Milky Way

Our galaxy contains a bar, which astronomers have proven some time ago and what you can not see in these photos. Well … the equipment available to professional astronomers allows them to see what a regular camera with a 200 [mm] lens certainly won’t see for us. Apparently, our galaxy has about 400 billion stars, estimated. I was wondering… how they estimated it?

Droga Mleczna / Milky Way

Full resolution: http://www.astrofoto.pekdar.net/wp-content/uploads/wppa-source/album-6/DrogaMleczna_jeden_kadr_v3.png

In the pictures presented, an expert and familiar eye will see many well-known and often photographed objects. What? Where? Well I’ll leave it you to discover in these photos. One of the photo presents the most visible ones.

Droga Mleczna / Milky Way - zredukowane gwiazdy

Full resolution: http://www.astrofoto.pekdar.net/wp-content/uploads/wppa-source/album-6/DrogaMleczna_jeden_kadr_v3_lessStars.png

Photos taken at 02 Jun 2019 on Tenerife, exactly in the place next to “God’s finger”.

Droga Mleczna / Milky Way with zooms

Full resolution: http://www.astrofoto.pekdar.net/wp-content/uploads/wppa-source/album-6/DrogaMleczna_jeden_kadr_v3_zoom.png

Equipment: Canon EOS 6D with a Canon Canon EF 24-105 [mm] F3.5-5.6 IS STM lens, on a glued iOptron CEM 25 mount, which I accidentally crashed on beton.

  • Composition: Astro Pixel Processor v1.077-6,
  • Processing: GIMP v2.10.14 + plug-ins (Linux),
  • Lights: 10 x 60[s] ISO-1000,
  • Flats: 42 ISO-1000,
  • Darks: 14 ISO-1000,
  • Bias: 20 ISO-1000

M6 & M7

The Butterfly Cluster (M6 and as NGC 6405) – in the picture zoomed above – is an open cluster of stars in the southern constellation of Scorpius. Its name derives from the vague resemblance of its shape to a butterfly.

Estimates of distance 1,590 light-years, giving it a spatial dimension of some 12 light years. Modern measurements show its total visual brightness to be magnitude 4.2. The cluster is estimated to be 94.2 million years old.

Source: https://en.wikipedia.org/wiki/Butterfly_Cluster

Gromada Motyl (M6) i Gromada Ptolemeusza (M7)

The Ptolemy Cluster (M7 and as NGC 6475) – in the picture zoomed below – is an open cluster of stars in the constellation of Scorpius. The cluster is easily detectable with the naked eye, close to the “stinger” of Scorpius. With a declination of −34.8°, it is the southernmost Messier object.

M7 has been known since antiquity; it was first recorded by the 2nd-century Greek-Roman astronomer Ptolemy, who described it as a nebula in 130 AD.

Telescopic observations of the cluster reveal about 80 stars within a field of view of 1.3° across. At the cluster’s estimated distance of 980 light years this corresponds to an actual diameter of 25 light years. The tidal radius of the cluster is 40.1 ly (12.3 pc) and it has a combined mass of about 735 times the mass of the Sun. The age of the cluster is around 200 million years while the brightest member star is of magnitude 5.6. In terms of composition, the cluster contains a similar abundance of elements other than hydrogen and helium as the Sun.

Source: https://en.wikipedia.org/wiki/Messier_7

Gromada Motyl (M6) i Gromada Ptolemeusza (M7) - Zoom

Photos (31.5.2019) taken at Tenerife, exactly in the place next to “God’s finger”.

Equipment: Canon EOS 6D with a Canon EF 200 [mm] 2.8L II USM lens, on a glued iOptron CEM 25 mount, which I accidentally crashed on beton.

  • Composition: Astro Pixel Processor,
  • Processing: GIMP v2.10.12 + plug-ins (Linux),
  • Lights: 62 x 60[s] ISO 800,
  • Flats: 60 ISO 800,
  • Darks: 21 ISO 800,
  • Bias: 20 ISO 800

The Rho Ophiuchi Nebula – Antares

is a multiple star system in the constellation Ophiuchus. The central system has an apparent magnitude of 4.63. Based on the central system’s parallax of 9.03 mas, it is located about 360 light-years (110 parsecs) away. The other stars in the system are slightly farther away. Rho Ophiuchi is the namesake of the Rho Ophiuchi cloud complex. It is a nebula of gas and dust, which the Rho Ophiuchi system is embedded in. It is one of the easiest star forming regions to observe, as it is one of the nearest, and it is visible from both hemispheres.

The interstellar extinction of Rho Ophiuchi is measured to be 1.45 magnitudes, meaning the dust and gas in front of Rho Ophiuchi absorbs light from the system, making it appear 1.45 magnitudes dimmer than it should be. Additionally, gas and dust also scatters more higher-frequency light, leaving the light appearing more reddish. The interstellar reddening of Rho Ophiuchi has been measured to be 0.47 magnitudes.

Rho Ophiuchi Nebula - Antares

This is my first processing with material collected in two different sessions, with different exposure parameters. It was a bit of work with it but I have a new skill now 😉

Source: https://en.wikipedia.org/wiki/Rho_Ophiuchi

Photos (June 2019) taken at Tenerife, exactly in the place next to “God’s finger”. A great place for astrophotography during night.

Equipment: Canon EOS 6D (no mod!) with a Canon EF 200 [mm] 2.8L II USM lens, on a damaged iOptron CEM 25 mount.

  • Composition: Astro Pixel Processor,
  • Processing: GIMP v2.10.12 + plug-ins (Linux),
  • Lights: 19 x 130[s] ISO 640 + 48 x 60[x] ISO 800,
  • Flats: 40 ISO-640 + 40 ISO-800,
  • Darks: 10 ISO-640 + 19 IS-800,
  • Bias: 20 ISO-640 + 20 ISO-800

NGC 6541 & M25

NGC 6541 (GCL 86 or ESO 280-SC4) – is a globular cluster in the southern constellation of Corona Australis. It is estimated to be around 14 billion years old. 6.3 [mag]. Distance from Sun 24,5 tly.

NGC 6541, M25 - Zoom

M25 (IC4725) – is an open cluster of stars in the southern constellation of Sagittarius. The cluster is located near some obscuring features, with a dark lane passing near the center. M25 is at a distance of about 2,000 light-years light-years away from Earth and is 67.6 million years old. The spatial dimension of this cluster is about 13 light-years across.

Photos (June 2019) taken at Tenerife, exactly in the place next to “God’s finger”. A great place for astrophotography during night and long conversations about the nature of time, speed of light, wondering if life exists in other planetary systems…

NGC6541-M25_v1-zoom.png

Equipment: Canon EOS 6D (no mod) with a Canon EF 200 [mm] 2.8L II USM lens, on a glued iOptron CEM 25 mount, which I accidentally earlier crashed on beton.

  • Composition: Astro Pixel Processor,
  • Processing: GIMP v2.10.14 + plug-ins (Linux),
  • Lights: 10 x 90[s] ISO 1000,
  • Flats: 40 ISO-1000,
  • Darks: 17 ISO-1000,
  • Bias: 20 ISO-1000