elpajare
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Post by elpajare on Feb 15, 2019 15:05:26 GMT
Messier 63 has a visual magnitude of 8.6, and apparent dimensions of 10'x 6'. Its spiral pattern resembles a giant celestial sunflower: a large central hub surrounded by tightly wound spiral arms. M 63 has been classified as type Sb or Sc, displaying a patchy spiral pattern; its spiral features are in a multitude of short arcs rather than long well-defined arms.
Remark: 55% moon and high humidity. The colors have been preserved in the processing. Pretty detail considering the 6 "and the Moon
Omegon RC 6"+IMX294+Risintech software
15x20" DFC+Startools
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elpajare
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home town/country: Girona-Spain
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Post by elpajare on Feb 15, 2019 16:42:33 GMT
Messier 94 is also notable in that it has two ring structures. The inner ring is a site of strong star formation activity, and is sometimes referred to as a starburst ring. It is traced by young, blue star clusters in color images, which sharply separates it from a much fainter population of an older, yellowish stars. In the outskirts, this region ends again, in a ring with moderate star formation activity, so that M 94 is one of the relatively rare galaxies in which two "waves" of stellar formation can be observed. In very long exposures, a further very faint ring, about 15' across, becomes visible. Remark: This is a very difficult galaxy with short exposures, the outer ring is very weak and barely noticeable. 8 "or 12" could give more detail. The Moon was 55%
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Post by Dragon Man on Feb 15, 2019 16:56:47 GMT
Fantastic results Carlos! Especially the detail in M63
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Post by Deleted on Feb 15, 2019 20:08:20 GMT
Great results again Carlos.
Are those images at F/9 or do you use a focal reducer with the RC6" cheers Paul
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elpajare
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Post by elpajare on Feb 16, 2019 7:45:02 GMT
Never use any reducer/filter with this combination.
I had the RC quite uncollimated and cost me enough to adjust it. All these telescopes with moving mirrors have to collimate them frequently. Anyway, the detail is good enough to be a 6 ". Thanks for the feedback.
If you want another day we can talk about collimation of newtons / RC ...hehe
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elpajare
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Post by elpajare on Feb 16, 2019 8:17:33 GMT
Messier 106 is a large, massive type Sb spiral system, with a tightly wound structure tilted 25° to our line of sight. This orientation explains partly why this galaxy's dust lanes are so prominent. They form a spiral pattern which can be traced into its bright central core. The spiral arms end in bright blue knots, which are young star clusters dominated by very hot, luminous, massive stars which only have a lifetime of a few million years. Also conspicuous is the yellowish remnant of an older spiral arm, whose color indicates that its more massive stars ceased to shine long ago. Remark: In spite of the Moon (55%) and the scarce opening of the RC6 "the IMX294 has been able to capture the tenuous blue nodules of star formation. Omegon RC 6"+IMX294+Risintech software
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elpajare
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Post by elpajare on Feb 16, 2019 9:53:07 GMT
NGC 4631 (the Whale) has a nearby companion dwarf elliptical galaxy, NGC 4627. The pair are included in the Arp Catalog of Peculiar galaxies as Arp 281. NGC 4631 and NGC 4627 are part of the NGC 4631 Group, a group of galaxies that also includes the interacting galaxies NGC 4656 and NGC 4657. This group of galaxies is between 25-30 million light years away. Remark: This type of bright galaxies are only a very low percentage of the total galaxies of magnitude = <12, they are easy targets for the beginner and the combination telescope / camera allows to find them easily in the sky. Another thing is the weaker galaxies, most of them, that need a smaller FOV and a better technique to find them and another combination scope/camera. There is a thread in CN about the hyperstar and its advantages, one of them is that "things" are found faster ... but in a reduced version mini. For me, the interesting thing is to get the maximum detail / color possible using a technique of Videoastronomy / EAA, I dont like so much hyperstar. But there are tastes for everything Omegon RC 6"+IMX294+Risintech software 15x20" DFC+Startools
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Post by Deleted on Feb 16, 2019 13:28:26 GMT
There is a thread in CN about the hyperstar and its advantages, one of them is that "things" are found faster ... but in a reduced version mini. For me, the interesting thing is to get the maximum detail / color possible using a technique of Videoastronomy / EAA, I dont like so much hyperstar. But there are tastes for everything
I have trouble with sct's and focal reducers on alt/az mounts for eaa .They are not fast enough. For me, hyperstar on the C6 and alt/az works well. Even less sensitive cameras like the 178 can give reasonable results with 15 to 20 sec exposures as long as the dso is not too dim. I really like f/2 scopes. You are prolific with your imaging ,Carlos, considering it is winter in Spain.Good job. On CN everyone living in the Northern Hemisphere is complaining that they havent seen a blue sky this year. cheers Paul
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elpajare
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Post by elpajare on Feb 16, 2019 15:25:44 GMT
I live in Spain the country of the Sun. In my town I have many days of clear skies without rain, it is not very good for farmers but it is good for astronomers.
I do not find it wrong to use hyperstar with short focal for large objects but the small ones, which are mostly in the northern hemisphere, have little detail in my opinion.
I would like to see examples of small and weak galaxies and planetary nebulae with this combination that you say to change my opinion. In CN I see many opinions but few photos.
Also the price of a hyperstar is quite high in Europe. In no Spanish forum is commented and nobody uses it. Here the most popular is the traditional astrophoto, you know, long exposures, guided, RGBL shots, etc ... people use the traditional setup.
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elpajare
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home town/country: Girona-Spain
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Post by elpajare on Feb 16, 2019 16:11:47 GMT
M 65 and M 66 two components of the Leo triplet. Remark: Despite the moon light (60%) the combination of the 6"RC+IMX294 gives a nice detail of this two galaxies. As usually, color features are the original, only a small treatment whit Startools in saturation. Postprocessing for me is Eliminate background noise, adjust the contrast and balance the color. You can do many more things but I like the most natural result possible Omegon RC 6"+IMX294+Risintech software
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elpajare
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home town/country: Girona-Spain
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Post by elpajare on Feb 16, 2019 16:56:40 GMT
One of the fainter Messier objects, M 95 has a visual magnitude of 9.7. It is a barred spiral of type SBb, with nearly circular arms spanning 4.4' x 3.3' of sky. Its overall appearance is quite similar to that of M 91, except that M 95 has a more pronounced spiral structure. Remark: This is one of the most difficult Messier objects if we want to capture all its amplitude of detail. You are at the limit of this telescope / camera combination and it might be better to use the SKW Quattro + IMX224. When the moon goes out, at the end of the month, I'll try it Omegon RC 6"+IMX294+Risintech software
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elpajare
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home town/country: Girona-Spain
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Post by elpajare on Feb 17, 2019 9:53:55 GMT
NGC 3628, also known as the Hamburger Galaxy or Mahasin's Galaxy, is an unbarred spiral galaxy about 35 million light-years away in the constellation Leo. It was discovered by William Herschel in 1784. It has an approximately 300,000 light-years long tidal tail. Along with M65 and M66, NGC 3628 forms the Leo Triplet, a small group of galaxies. Its most conspicuous feature is the broad and obscuring band of dust located along the outer edge of its spiral arms, effectively transecting the galaxy to the view from Earth. Notes: The photo was taken with the Moon at 60%, as the moonlight increases the detail goes down Omegon RC 6"+IMX294+Risintech software
10x20" DFC+Startools
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