Category: saját asztrofotóim

California Nebula, Pleiades Cluster

California nebula and the Pleiades

Two nebulae and a cluster – perhaps the cluster – in one frame, this is the NGC 1499 California emission nebula and the M45 Pleiades open cluster with the reflection nebula it is passing through. Parts of the complex nebula system are also visible, with a hint of the LBN 777 Baby Eagle Nebula being there too. This picture was a challenge due to less than ideal transparency, odd gradients on the sky and the approaching moonrise. My starheal program did a great job. California Nebula and the Pleiades, 10×2 min, ISO 1600, Canon 1100D mod, Canon 50mm f/1.8 @ f/3.5, HEQ5, Dângău Mare, 2016-11-20

(tovább…)


Her Majesty, Queen Cassiopeia

Cassiopeia, 23×3 min, ISO 1600, Canon 1100D mod, 50 mm f/1.8 @ f/4, HEQ5, Dângău Mare

(tovább…)


Heart and Soul, reprocessed

Heart and Soul in Cassiopeia

This time I used two old data sets of IC 1805 and IC 1848, one from when the camera has not been modified yet and one from last summer, both under fair skies.

(1) 41×2 min, ISO 1600, Canon EF 200mm f2.8L II USM at F/3.5, Canon 1100D unmod, EQ3 (see article)
(2) 8×3 min, ISO 1600, Canon EF 200mm f2.8L II USM at F/4, Canon 1100D mod, HEQ5 (see article)

I reduced the stars with my own program.

Galaxies Maffei 1 and Maffei 2 are also in the frame, the yellow patches on the bottom. Both galaxies are in the zone of avoidance, ie in the plane of the Milky Way where the dust adds up to be almost opaque. Wiki says 99.5% of the light of Maffei 2 is obscured. In a crop below I emphasize these objects with infrared data from WISE. The dust is mostly transparent at infrared wavelengths.

(tovább…)


NGC 7000 North America (the December 2016 version)

I once more reprocessed the North America raws I have from 2015.

20151213_north_america_ngc7000_processedon20161216_nostars100

 

(tovább…)


NGC 1499 California Nebula

20161204_z_ngc1944_california_nebula_stack1_crop_dss1_psc_nostars075The sky allowed only very few exposures on this object, and the -8°C temperature was somewhat unforgiving. In order to cancel out a known lens error (the lens seems to be off a bit from the ideal perpendicular), I rotated the gear 180 degrees at half of the session.

Canon 1100D mod, 14×2 min, ISO 1600, Canon EF 200mm f/2.8L II USM at f/4, HEQ5, Dângău Mare

(tovább…)


IC 2944, the Running Chicken reprocessed

I reprocessed the data obtained in Namibia, processed a few times before.

20160501_running_chicken_branch20161201_nostars076


Cometa falsă, cadru larg

The Fake Comet, at 50mm

The False Comet, at 50mm

Regiunea nucleului Căii Lactee este, evident, una dintre cele mai bogate zone de pe cer. Astfel, cometa falsă – care nu este un obiect de sine stătător -, apare și ea în mai multe postări sau poze. Date tehnice: Canon 1100D mod, 35x135sec, ISO 800, Canon EF 50mm f/1.8 II la f/4. Datorită câmpului de stele foarte dens, mi-am folosit și programul care elimină stelele ca ele să fie repuse la loc cu impactul dorit, accentuând formele mari în loc de granulația omniprezentă.

(tovább…)


Centaurus, Crux, Carina

Two pictures this time, both featuring Crux. Differences in processing technics and regarding the invested amount of time are visible.

alpha and beta Centauri, the Coalsack and Crux, 20x240s, ISO 800, 50 mm, F/5

alpha and beta Centauri, the Coalsack and Crux, 20x240s, ISO 800, 50 mm, F/5

The Coalsack, Crux and the Carina Nebula, 43x135s, ISO 800, 50 mm, F/4

The Coalsack, Crux and the Carina Nebula, 43x135s, ISO 800, 50 mm, F/4

 

(tovább…)


Centaurus A, ω Centauri

Cen A, ω Cen

Cen A, ω Cen

Liniștea deșertului are un farmec aparte. Lângă instrumente, stăteam într-un scaun sau fotoliu care semăna cu o sferă tăiată în două, foarte mare, solid și stabil, fiind posibil să mă întind sau să mă ghemuiesc după plac. Astfel puteam sta într-o poziție în care aveam întregul câmp vizual umplut de Calea Lactee, cu nucleul în mijloc, acesta aflându-se la zenit, o imagine simetrică, luminosă, cum spuneam mai demult, o frumusețe inumană. Oarecum copleșit de această priveliște, totuși, simți că ești: acasă. Multe nopți am petrecut așa într-o solitudine relativă, ceilalți colegi având instrumentele amplasate la 10-20 metri, trecerea timpului fiind marcată de zgomotul oglinzii și al obturatorului și de zâmzetul foarte subtil al monturii. Echipat cu un binoclu, mai aruncam câte o privire, mai mult poetică decât astronomică – așa mi-a venit ideea să pozez o pereche neobișnuită. (tovább…)


Rosette Nebula (Caldwell 49), 2016-10-16 processing

Rosette Nebula (as processed on 2016-10-16)

Rosette Nebula (as processed on 2016-10-16)

I used the old raw material as described in this post, but this time I used the new program described here. This is the result.

From wikipedia: The Rosette Nebula (NGC 2237, 2238, 2239, and 2246) is a diffuse nebula in Monoceros. It has an overall magnitude of 6.0 and is 4900 light-years from Earth. The Rosette Nebula, over 100 light-years in diameter, has an associated star cluster and possesses many Bok globules in its dark areas. It was independently discovered in the 1880s by Lewis Swift (early 1880s) and Edward Emerson Barnard (1883) as they hunted for comets.

I also looked up the small open cluster on the lower right of the frame, it is NGC 2236. It is about 9600 light years away, ie about twenty times further than the Pleiades.

Canon 1100D mod, obi de 200mm F/2.8 la F/4, 20×150 sec, ISO 800, EQ3, Dângău Mare, Cluj, 2016-04-03

(tovább…)


Jól kalibrált monitoron mindegyik számnál elkülönülő árnyalat látszik. Ha mégsem látszanak, akkor a megjelenített képek színhiányosan rajzolódnak ki. A monitort valószínűleg kalibrálni kell.

You should see distinct shades for each number. If those shades are not clearly visible, the displayed pictures will lack accuracy. Your display most likely needs to be calibrated (brightness, gamma, contrast etc.).