NGC i IC objekti

[Astro_fun_times]

Nema sta da uklanjam spajkove, to je tako na njutnu.
A i to bi bila velika zajebancija maskirati kako se ne bi stretchova taj deo, nisam bas toliko lud da se time bakcem😂

[kruska]

Dok ne snimim dovoljno frameova ybog oblaka idu obrade od prosle godine,
Hvala na paznji     
Obrada PI IC1795, 100x30s fish head nebula  f2 420mm, ASI533..
P.s. U sredini slike nije artefakt od gradienta nego deo nebule sa OIII

[Astro_fun_times]

Bravo kruska, dobra je

[bratislav]

Kad je vreme lose, vadimo slike iz naftalina (i ponovo ih obradjujemo).
Ovaj put jos jedan daleko juzni objekat, vrlo poznat ali nazalost ne i vidljiv iz nasih krajeva, velicanstveni Centaurus-A, NGC 5128, Caldwell 77. Jedan od najsjajnijih X-ray i radio objekata na nebu pogonjen jednom od najmasivnijih crnih rupa koje znamo, uz to i fizicki najblizi nama X-ray izvor.

Vizuelno takodje impresivan objekat, poznat medju amaterima kao "hamburger galaksija".

Sa Wikipedije:

"Centaurus A (also known as NGC 5128 or Caldwell 77) is a galaxy in the constellation of Centaurus. It was discovered in 1826 by Scottish astronomer James Dunlop from his home in Parramatta, in New South Wales, Australia. There is considerable debate in the literature regarding the galaxy's fundamental properties such as its Hubble type (lenticular galaxy or a giant elliptical galaxy) and distance (11–13 million light-years). It is the closest radio galaxy to Earth, as well as the closest BL Lac object, so its active galactic nucleus has been extensively studied by professional astronomers. The galaxy is also the fifth-brightest in the sky, making it an ideal amateur astronomy target. It is only visible from the southern hemisphere and low northern latitudes.

The center of the galaxy contains a supermassive black hole with a mass of 55 million solar masses, which ejects a relativistic jet that is responsible for emissions in the X-ray and radio wavelengths. By taking radio observations of the jet separated by a decade, astronomers have determined that the inner parts of the jet are moving at about half of the speed of light. X-rays are produced farther out as the jet collides with surrounding gases, resulting in the creation of highly energetic particles. The X-ray jets of Centaurus A are thousands of light-years long, while the radio jets are over a million light-years long.

It is also one of the nearest large starburst galaxies, of which a galactic collision is suspected to be responsible for an intense burst of star formation. Models have suggested that Centaurus A was a large elliptical galaxy that collided with a smaller spiral galaxy, with which it will eventually merge. For that reason, the galaxy has been of particular interest to astronomers for years. While collisions of spiral galaxies are relatively common, the effects of a collision between an elliptical and a spiral galaxy are not fully understood."

200mm f/5 Njutn (sa Paracorr-1 je f/5.75), 10x10min subs, prastara QHY-8, snimljeno sa Bortle 2 lokacije (mozda je tada bila cak i Bortle 1, snimljeno je 2009 kad je Bendigo koji je najblizi grad bio manji)


5128_crop by bratislav3162, on Flickr

[bratislav]

I jos jedan sa dalekog juga.
NGC 104 je verovali ili ne DRUGI najsjajniji kuglasti skup na nebu. Svejedno izuzetno impresivan i u okularu i na chipu.

"47 Tucanae or 47 Tuc (also designated as NGC 104 and Caldwell 106) is a globular cluster located in the constellation Tucana. It is about 4.45 ± 0.01 kpc (14,500 ± 32.6 ly) from Earth, and 120 light years in diameter. 47 Tuc can be seen with the naked eye, with an apparent magnitude of 4.1.[10] It appears about 44 arcminutes across including its far outreaches. Due to its far southern location, 18° from the south celestial pole, it was not catalogued by European astronomers until the 1750s, when the cluster was first identified by Nicolas-Louis de Lacaille from South Africa.

47 Tucanae is the second brightest globular cluster after Omega Centauri, and telescopically reveals about ten thousand stars, many appearing within a small dense central core. The cluster may contain an intermediate-mass black hole.
The cluster was recorded in 1751-2 by Nicolas-Louis de Lacaille, who initially thought it was the nucleus of a bright comet. Lacaille then listed it as "Lac I-1", the first object listed in his deep-sky catalogue"

250mm f/5 Njutn sa Paracorr-1 (f/5.75) na homemade montazi, QHY-8, 40x60s subs, slikano iz Melburna (Bortle 6).

47Tuc_NGC104 by bratislav3162, on Flickr

[Yagodinac]

Kako 47 Tucanae izgleda vizuelno, jel se nazire golim okom?

[bratislav]

I naravno, "the King" himself Omega Centauri - najsjajnije i najvece globularno jato na nebu.
Ovde sam malo odstupio od prakse i upotrebio "umetnicku slobodu" da pojacam local contrast kako bi se "oci" Omege (dve tamnije sekcije unutar jata) istakle i time docarao kako se ovo jato vidi kroz okular u teleskopu, barem kako ja to dozivljavam.
Iako mnogi glasaju za 47 Tuc kao najlepse (zbog svog vrlo koncetrisanog jezgra vise lici na "pravo" globularno), za mene je ipak Omega, bez obzira na svoju donekle "flat" prezentaciju, ipak najlepsi objekat ove vrste. Jato sam inace razlucio u vrlo malim teleskopima (barem za globulare), poput mog bivseg Vixen 80mm ahromata. U mom 40cm Dobsonu nikada nije prestalo da mi bukvalno izbije dah.

Takodje 250mm f/5 Njutn sa Paracorr-1 (f/5.75) na homemade montazi, QHY-8, ovog puta 20x60s subs, slikano iz Melburna (Bortle 6).

"Omega Centauri (ω Cen, NGC 5139, or Caldwell 80) is a globular cluster in the constellation of Centaurus that was first identified as a non-stellar object by Edmond Halley in 1677. Located at a distance of 17,090 light-years (5,240 parsecs), it is the largest known globular cluster in the Milky Way at a diameter of roughly 150 light-years. It is estimated to contain approximately 10 million stars, with a total mass of 4 million solar masses, making it the most massive known globular cluster in the Milky Way.

Omega Centauri is very different from most other galactic globular clusters to the extent that it is thought to have originated as the core remnant of a disrupted dwarf galaxy.

At a distance of about 17,000 light-years (5,200 parsecs) from Earth, Omega Centauri is one of the few globular clusters visible to the naked eye—and appears almost as large as the full Moon when seen from a dark, rural area. It is the brightest, largest and, at 4 million solar masses, the most massive-known globular cluster associated with the Milky Way. Of all the globular clusters in the Local Group of galaxies, only Mayall II in the Andromeda Galaxy is brighter and more massive. Orbiting through the Milky Way, Omega Centauri contains several million Population II stars and is about 12 billion years old."



OmegaCentNGC5139crop by bratislav3162, on Flickr

[bratislav]

Kako 47 Tucanae izgleda vizuelno, jel se nazire golim okom?

Naravno. Zato i ima Flamsteedov broj (47-ma "zvezda" u sazvezdju Tucanae). Golim okom je vec sasvim jasno da to nije zvezda, vec nesto "vunastije". Naravno, tamno nebo je imperativ, iz grada se ne vidi.

[bratislav]

Nema sta da uklanjam spajkove, to je tako na njutnu.
A i to bi bila velika zajebancija maskirati kako se ne bi stretchova taj deo, nisam bas toliko lud da se time bakcem😂

Lakse je modifikovati spajder da ima manje difrakcije ...

[Astro_fun_times]

Au Bratislave, dobar ovaj naftalin😂
Centaurus-A mislim da je i najlepsa galaksija od svih za videti i slikati. Šteta sto se odavde ne vidi.

Nema sta da uklanjam spajkove, to je tako na njutnu.
A i to bi bila velika zajebancija maskirati kako se ne bi stretchova taj deo, nisam bas toliko lud da se time bakcem😂

Lakse je modifikovati spajder da ima manje difrakcije ...

Kako kome. Vi imate znanje i vestine pa je vama lakse. Onaj vas spider je vrhunski.
Nazalost, ja sam morao da se zadovoljim sa aluminijumskim slajderom sa dosta debelim slajkovima koji mi drze kolimaciji savrseno ali cini spajkove na zvezdama dosta debljim i ruznijim.
Ali nije da sam imao puno izbora.
Kada bih imao fiksan setup verovatno bih testirao stari spajder koji je tanji, jer tad ne bih stalno nosao teleskop tamo vamo i tumbao pa bi kolimacija duze trajala.

[bratislav]

Nisam sasvim siguran gde da stavim ovo.

Dark Doodad je nebula koja je otkrivena tek 1977 godine, i zvanicno i nema kataloski broj, mada je neki stavljaju u Sandqvistov katalog pod rednim brojem 149. Vidljiva je (jedva!) dvogledom sa vrlo tamnih mesta u dalekom juznom sazvezdju Musca. Obliznje kuglasto jato nosi NGC broj 4372.
Izuzetno teska za obradu (barem meni). Ovaj portret je radjen sa 102/714mm APO sa TSFLAT 2.5 flattenerom. SBIG STL 11000 kamera, RGB filter set (50mm round), 3h ukupne ekspozicije sa Bortle 2 lokacije. Snimljeno Marta 2014 godine.

"The Dark Doodad Nebula is a dark nebula near the globular cluster NGC 4372, much closer than the centre of the galaxy and in the galactic plane, having a length of nearly three degrees of arc. Although officially unnamed, this long molecular cloud has come to be known under this name. It can be found in the southern constellation of Musca (the Fly) with strong binoculars.

This cloud consists of regions of dense gas and dust, and is one of the closest star forming regions to the Solar System. It was described in Sky & Telescope as one of the finest dark nebulae—one that is "wonderful, winding, and very definite". Just to the east of the southern end of the Dark Doodad is NGC 4372. It has also been called the Musca nebula and grouped as the Musca-Chamaeleonis Molecular Cloud.

The nebula was catalogued by Aage Sandqvist, astronomer at Stockholm Observatory, in 1977. The name Dark Doodad was given to it by American amateur astronomer and writer Dennis di Cicco in 1986 upon seeing an image he took from Alice Springs in central Australia. Steven Coe gave it the name Sandqvist 149, because he believed it should be named after the astronomer who found it, though he acknowledges that the popular term prevails."

Doodad-RGB by bratislav3162, on Flickr

[kruska]

Pršti od odličnih slika, 🤪 idemo!

Ja imam QHY8L zapostavljen zbog asi533 ali ga planiram staviti na neki od teleskopa i staviti u redovnu upotrebu.
Bar jos neki filter i talasnu duzinu slikati.