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nandopg

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About nandopg

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  1. The Lagoon Nebula Messier 8 (M8, NGC 6523) is one of the finest and brightest star-forming regions in the sky. It is a giant cloud of interstellar matter which is currently undergoing vivid star formation, and has already formed a considerable cluster of young stars. One of the remarkable features of the Lagoon Nebula is the presence of dark nebulae known as 'globules' (Burnham) which are collapsing protostellar clouds with diameters of about 10,000 AU (Astronomical Units). Some of the more conspicuous globules have been cataloged in E.E. Barnard's catalog of dark nebulae: Barnard 88 (B 88), the comet-shaped globule extended North-to-South (up-down) in the right half and near top of the image, small B 89 in the region of cluster NGC 6530, and long, narrow black B 296 at the south edge of the nebula (lower edge of the image). According to David Eichler, the nebula has probably a depth comparable to its linear extension indicated above. Within the brightest part of the Lagoon Nebula, a remarkable feature can be seen, which according to its shape is called the "Hourglass Nebula". This feature was discovered by John Herschel and occurs in a region where a vivid star formation process appears to take place currently; the bright emission is caused by heavy excitation of very hot, young stars, the illuminator of the hourglass is the hot star Herschel 36 (mag 9.5, spectral class O7). Closely by this feature is the apparently brightest of the stars associated with the Lagoon Nebula, 9 Sagittarii (mag 5.97, spectral class O5), which surely contributes a lot of the high energy radiation which excites the nebula to shine. As published in January 1997, the Hubble Space Telescope has been used to study the Hourglass Nebula region in the Lagoon Nebula M8. The young open cluster NGC 6530 associated with the Lagoon Nebula M8 was classified as of Trumpler type "II 2 m n" (see e.g. the Sky Catalog 2000), meaning that it is detached but only weakly concentrated toward its center, its stars scatter in a moderate range of brightness, it is moderately rich (50--100 stars), and associated with nebulosity (certainly, with the Lagoon nebula). As the light of its member stars show little reddening by interstellar matter, this cluster is probably situated just in front of the Lagoon Nebula. Its brightest star is a 6.9 mag hot O5 star, and Eichler gives its age as 2 million years. Woldemar Götz mentions this cluster as containing one peculiar Of star, an extremely hot bright star of spectral type O with peculiar spectral lines of ionized Helium and Nitrogen. M8 is situated in a very conspicuous field of the Sagittarius Milky Way. The image: Stack: 16 frames x 1200 sec of each Ha, O3 and S2 Telescope: Skywatcher Esprit 120mm f/7 Camera: ST8300M Pre-processing and processing: Pixinsight Thanks for looking, Fernando
  2. Thanks for the feedback. I think this molecular cloud is very peculiar because of the asymmetrical Wolf-Rayet star that made it up. As for the color, the majority of the cloud is formed by Olll, which was mixed with the blue channel. I think this is the reason. Best Regards, Fernando
  3. Distant from Earth 11 736 light years in the southern constellation of Carina, NGC 3199 is classed as a diffuse nebula, embedded with a highly assymetric Wolf-Rayet star close to the center of the ring. The nebula is about 75 light-years across. A Wolf-Rayet star is hot, short-lived and generates an intense stellar wind. The one in NGC 3199, as mentioned, has a highly asymmetric morphology, with a very bright hemisphere near the exciting star HD 89358 and a much fainter and more extended other hemisphere. This nebula is modeled in terms of the distorted bubble produced by a moving star blowing a strong stellar wind into a surrounding uniform interstellar medium. This description is an outine of the article found in: http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1989A%26A...226..270D&defaultprint=YES&filetype=.pdf The image is a LRGB standard enhanced by narrow band data from captures of 12 subframes of 20 minutes for each channel (Ha, O3 e S2). The subs of LRGB followed the sequence showed below: Lum: 10x900sec bin1x1 RGB: 10x600sec bin2x2 Set-up: Scope: Esprit 120 f/7 Mount: CGE-Pro Camera: ST8300M OAG and Filter Wheel: SBIG 8300 Guider CCD: Lodestar Darks, bias and Flats applied
  4. Thank you so much Dave Regards, Fernando Thanhs Ewan! Regards, Fernando Thanks, almost every features on the photosphere are there. I was fortunate to get a good seeing during the capture. Regards, Fernando Thanks Regards, Fernando Thank you very much for the kindness, Regards, Fernando Thanks, that texture is the granulation on the photosphere Regards Fernando Thanks for the comppliment Regardd, Fernando Rio Thank you for the kind words. I used a wedge of Herschel, a refractor of 125mm f/7.5, a power mate x4 and a ccd starhopping express from PTGrey Regards, Fernando I am really happy with your post and a so great compliment. Thank you very much. Regards, Fernando Thak you, Regards, Fernando
  5. This image has a number of features respect to the Photosphere: The Granulation: The Solar granules measure around 1000Km in diameter and has its center part brighter than the area around it, due to the presence of hot gas. The granules are convection cells, that present upward gases at 1Km/sec in the center. As it cools, the gas radiates its energy in the form of visble electromagnetic energy to the space. The Sun Spot: It is clear the central umbra, surrounding penumbra a small light bridge and the filaments of the sun spot. I hope you like, Fernando
  6. Rosette nebulae is a Ha region with a circular shape, located close to a giant molecular cloud in Monoceros. Associated with the the nebula, the open cluster NGC 2244 has been formed with material from the nebula The Rosette Nebula is an emission nebula which is about 5,000 light years away from Earth in the constellation of Monoceros. The nebula spans about 130 light years in diameter and the central cavity of the nebula is about 50 light years in diameter. The symmetric shape of the petals are sculpted by the winds and radiation from the hot young stars in the central region Like most emission nebulae, however, the central young stars emit high intensity radiation that also excites other types of elements within the cloud to emit at their own characteristic wavelengths. For instance, sulfur (SII) emits at 673.0 nm, and OIII emits at 500.7 nm (most intense) and, to a lesser extent, at 495.9 nm. By using filters that capture SII, Ha, and OIII emission, it is possible to map these colors into the more conventional R, G, and B color palette, respectively. Assigning these narrowband images in this order (highest to lowest wavelengths) to R, G, and B defines the Hubble Palette, which is how the above image was constructed. Oserve the dark filaments present on the nebula. Characteristics: Magnitude: 4.8 (for NGC 2244 star cluster in center) Distance: 5500 light years RA: 6h 32m 33s Dec: 4 degrees 57' 05" Position Angle: 0 degrees Image: Stack: 8x1200sec for each channel of Ha. S2 and O3 Scope: Skywatcher QuatroCF 10" f/4 Camera: Sx-694 trius
  7. Oh yes, lots of them Thanks, Fernando Thank you Olly !! Regards, Fernando M13 is a beautiful globular cluster as well. Thank you anyway. Best Regards, Fernando Thanks for the compliment, Best Regards, Fernando Thank you very much. You don't have a view of Omega Centauri being in Northern Hemisphere, however there are some meetings in Brazil in sites with spectacular sky tha are open to everyone. Just come down !!
  8. Located in Centauri constellation and distante 15,800 light years from Earth, Omega Centauri is the most massive globular cluster known with 4 million Solar masses. It has been speculated that Omega Centauri is a Dwarf galaxy that was absorbed by our Milk Way. Indeed, Kapteyn's star, which is currently only 13 light years away, is thought to originate from Omega Centauri. Omega Centauri's chemistry and motion in the galaxy is also consistent with this picture. Needless to say that Omega Centauri is a very peculiar globular cluster, a beauty either to be imaged or visually seen at the telscope. This time I imaged Omega with the Quattro, an ultra fast scope, getting a substantial reduction of the integration time, comparing with the last image that I took with a refractor f/7. Please see below. This image is a stack as follows: Lum: 20x100sec bin1x1 R,G,B: 10x 120sec bin 1x1 Telescope: Skywatcher Quattro CF 10" Camera: SX694 Trio Mount: EQ-6 Pro guided CCD Guider: Lodestar Transparency was good. Seeing was good all over the session (FWHM from 2.1 to 2.5)
  9. First thank you very much for the compliment. I will keep posting my images in this great Forum with no doubts. Regards, Fernando Hi Olly, Thank you so much for the gentle comments and appreciation. Regards, Fernando Hi Rodd, Thanks alot for your comments and kind words. With the C-11 this galaxy should be great. I am eager to see your outcome. Regards
  10. Thank you very much for the kind feedback. I am happy that you like the image Regards, Fernando Thank you for the great evaluation. Regards, Fernando Thanks alot for the kindness! Regards, Fernando Bobby-dazzler is your more than kind and generous comment, to wich I am very grateful. Indeed, it made my day! This image has been taken from my home observatory in a week with the seeing particularly very good. Also the matching between the camera SX-694 and the Skywatcher Quattro, a Newt 10" f/4, played an important role. Once again, thank you very much. Regards, Fernando Thank you so much sir. I appreciate your thumbs up. Regards, Fernando
  11. NGC 1097 is a barred spiral galaxy and also a Seyfert galaxy. The galaxy is 45 million light years away from us in the constellation Fornax. It is a severely interacting galaxy with obvious tidal debris and distortions caused by interaction with the companion galaxy NGC 1097A, visible on the image aligned with the major axis of the elliptical shape of NGC 1097's core. NGC 1097 has a supermassive black hole at its center, with around 140 million times the mass of the Sun. Around the central black hole is a glowing ring of star-forming regions with a network of gas and dust that spirals from the ring to the black hole. An inflow of material toward the central bar of the galaxy causes new stars to be created in the ring. The ring is approximately 5,000 light years in diameter, the spiral arms of the galaxy extend tens of thousands of light-years beyond the ring. The ring can be seen on this image, well in the center of the core. Observational data: Constellation Fornax Right ascension 02h 46m 19.0s Declination −30° 16′ 30″[1] Redshift 1271 ± 3 km/s Distance 45 million ly Apparent magnitude (V) 10.2 Apparent size (V) 9′.3 × 6′.3 Other designations PGC 10488, Caldwell Capture: Scope: Quattro CF 10" f/4 Camera: SX694 Trius CCD Guiding: Lodestar Mount: Skywatcher AzEq 6 Pro Image Stack: Luminance: 35x400sec Red: 16x600sec Blue: 16x600sec Green: 10x600sec
  12. Thank you for the very kind evaluation. Regards, Fernando Thanks for your comment and appreciation. Regards, Fernando Thank you very much. Best Regards, Fernando
  13. Hello my friend, Thank you very much for the evaluation, Regards, Fernando
  14. Thanks for the appreciation Ian !! Best Regards, Fernando Thank you so much !! Best Regards, Fernando Thank you ! Best Regards, Fernando Thank you, your comments have been highly appreciated. Best Regards, Fernando
  15. Thanks Dave, but your last image is great, there is nothing poor in it. Best Regards, Fernando Thank you so much ! To be true, neither do I. All we have here is rain, lots of rain. Best Regards, Fernando