Celestial hemisphere:  Southern  ·  Constellation: Pavo (Pav)  ·  Contains:  IC 4820  ·  NGC 6744
NGC6744 - A sibling of the Milky Way, Wellerson Lopes
NGC6744 - A sibling of the Milky Way
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NGC6744 - A sibling of the Milky Way, Wellerson Lopes
NGC6744 - A sibling of the Milky Way
Powered byPixInsight

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Description

Ps. English text just below portuguese version.

Nome: NGC 6744

Tipo: Galáxia espiral barrada (Sbc) [1]

Distância: ~31.000.000 anos-luz [2]

Magnitude (filtro V): 9,25 [1]

Constelação: Pavão (The Peacock)

Existem relativamente poucas galáxias espirais grandes no nosso universo local, num raio de 40 milhões de anos-luz do nosso grupo local de galáxias. NGC 6744 está distante cerca de 30 milhões de anos-luz e comparada a outras galáxias é muito similar à nossa Via Láctea. De fato, se estivéssemos nesta galáxia irmã e observássemos a nossa galáxia veríamos uma imagem semelhante a esta. [3]

O disco da galáxia NGC 6744 possui cerca de 175.000 anos-luz de distância, que é maior do que o disco de nossa galáxia. Isto faz de NGC 6744 um tipo de irmã mais velha da nossa Via Láctea. Ela possui um núcleo alongado, ou barrado, e braços espirais bem distintos. Os braços espirais do disco são locais dentro da galáxia com grande formação estelar e com muita poeira. Poeira e formação estelar andam de mãos dadas.[3]

Fonte:

[1] - HyperLeda - Database for physics of galaxies - http://leda.univ-lyon1.fr/ledacat.cgi?o=ngc6744

[2] - The local Tully-Fisher relation for dwarf galaxies, Igor D. Karachentsev, Elena I. Kaisina, Olga G. Kashibadze - https://arxiv.org/abs/1611.02574

[3] - Nasa - https://www.nasa.gov/mission_pages/WISE/multimedia/gallery/pia13114-4x3.html

Esta imagem foi registrada durante os dias 07 e 08 de setembro de 2018 e 08 de junho de 2019 na zona rural de Munhoz - Minas Gerais - Brasil. Local com escala de Bortle 4.

Dados técnicos:

Gain 75 e 139, offset 10, temperatura da câmera -20°C, exposição total de 7h03m (141 subs), darks (40), flats (180) e darks flats (80) aplicados.

Filtros:

Luminância (IR/UV Cut) 47 x 180s / Bin 1x1 / Gain 75

Luminância (IR/UV Cut) 36 x 180s / Bin 1x1 / Gain 139

Vermelho 22 x 180s / Bin 1x1 / Gain 139

Verde 18 x 180s / Bin 1x1 / Gain 139

Azul 18 x 180s / Bin 1x1 / Gain 139

Equipamento:

- Montagem Equatorial Orion Atlas EQ-G

- Telescópio GSO Ritchey-Chretien 8" F8 Fibra de Carbono

- Câmera ZWO ASI1600MM Cooled

- Redutor focal Astro-Physics 67 CCDT

- Auto guiagem com câmera ZWO ASI120MM em OAG

- Roda de Filtros ZWO 8 posições

- Filtros Optolong 1,25" Luminance, Red, Green, Blue

Softwares:

- Captura: APT - Astro Photography Tool 3.50

- Processamento: PixInsight 1.8 e Adobe Photoshop CS5

- Guiagem: PHD2

- Controle: EQMOD e SkyTechX

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Name: NGC 6744

Type: Spiral Barred Galaxy (Sbc) [1]

Distance: ~31.000.000 light-years [2]

Magnitude (filter V): 9,25 [1]

Constellation: Pavo (The Peacock)

There are relatively few large spiral galaxies in the local universe (within about 40 million light-years of our Local Group of galaxies). NGC 6744 is about 30 million light-years away and, compared to other local galaxies, is very similar to our Milky Way galaxy. In fact, if there are observers somewhere in this sibling galaxy looking back at the Milky Way, they might see a very similar image.[3]

The galaxy's disk is about 175,000 light-years across, which is larger than the Milky Way's disk, making NGC 6744 kind of like the Milky Way's big brother. It has an elongated, or barred, core and distinct spiral arms. The spiral arms of the disk are the sites of star formation within the galaxy and are very dusty. Dust and star formation go together hand-in-hand. [3]

Source:

[1] - HyperLeda - Database for physics of galaxies - http://leda.univ-lyon1.fr/ledacat.cgi?o=ngc6744

[2] - The local Tully-Fisher relation for dwarf galaxies, Igor D. Karachentsev, Elena I. Kaisina, Olga G. Kashibadze - https://arxiv.org/abs/1611.02574

[3] - Nasa - https://www.nasa.gov/mission_pages/WISE/multimedia/gallery/pia13114-4x3.html

This image was captured at days 7th and 8th September 2018 and 8th June 2019 in rural zone of Munhoz - Minas Gerais - Brazil. Bortle Scale 4. I will revisit this object because luminance frames was affected by bad seeing.

Technical data:

Gain 75 and 139, offset 10, sensor's temperature -20°C, total exposition of de 7h03m (141 subs), darks (40), flats (180) and darks flats (80) applied.

Filters:

Luminance (IR/UV Cut) 47 x 180s / Bin 1x1 / Gain 75

Luminance (IR/UV Cut) 36 x 180s / Bin 1x1 / Gain 139

Red 22 x 180s / Bin 1x1 / Gain 139

Green 18 x 180s / Bin 1x1 / Gain 139

Blue 18 x 180s / Bin 1x1 / Gain 139

Equipments:

- Equatorial Mount Orion Atlas EQ-G

- GSO Ritchey-Chretien Telescope 8" F8 Carbon Fiber

- ZWO ASI1600MM Cooled

- Focal reducer Astro-Physics 67 CCDT

- Guided with ZWO ASI120MM using OAG

- ZWO Filter Wheel (8 x 1.25")

- Filter Optolong 1.25" Luminance

- Filter Optolong 1,25" Red

- Filter Optolong 1,25" Green

- Filter Optolong 1,25" Blue

Softwares:

- Capture: APT - Astro Photography Tool 3.50

- Processing: PixInsight 1.8 and Adobe Photoshop CS5

- Guiding: PHD2

- Control: EQMOD and SkyTechX

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