Csillagtúra az Apáczaisokkal

A tavaszi után volt most — 2018-10-18 — egy őszi túra. A felhők miatt alig látszódott valami

éjszakai fotó, városi és holdfényes éggel

.

A kép éjszaka készült

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Bye-bye camera battery

UPS battery powered Canon

I work with a modified Canon 1100D camera, which uses the LP-E10 battery. The battery pack has the tiny nominal capacity of 860 mAh (Canon original), 950 mAh (some copy) or 850 mAh (some other copy), equalling 6-7 Wh. During a long photo session, and depending on the temperature, 2-3 batteries may go out from fully charged to blinking red, interrupting the photo session, and – on the long term – mean further replacement batteries. For comparison, a UPS battery holds at around 80Wh, at least on paper.

While the form factor is proprietary, meaning vendor (or at least product) lock in, the batteries are dumb. Luckily. Luckily the battery pack has no digital identification mechanism, so some crocodile clips are enough to replace them. No need to disassemble one to use the chip or something like that. So I got to work.

(tovább…)

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Orbiting around Saturn

Saturn’s moons

I imaged the moons of Saturn with a difference of about an hour. They moved :)

(tovább…)

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The Moon – 2018-09-20

This is the first light of the ASI 120 MM camera, the most recent addition to my instruments. The Moon below is a mosaic made with the N 150/750 and through a Barlow lens.

(tovább…)

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Saturn 2018-09-20

The same file, two different processings. Raw data obtained with N 150/750, barlow, ADC, tubes, ASI 224 MC, 2% of 40k frames.

(tovább…)

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Some Saturn Pictures

Some Saturn images with the N 150/750 + ASI 224 MC gear.

2018.09.12. 20 34 07

2018.09.12. 20 34 07

2018.09.12. 20 34 07

2018.09.12. 20 34 07

2018.09.12. 20 34 07

2018.09.12. 20 34 07

2018.09.14. 20 42 08

2018.09.14. 20 42 08

2018.09.14. 20 22 49

2018.09.14. 20 22 49

2018.09.14. 20 22 49

2018.09.14. 20 22 49

2018.09.14. 20 22 49

2018.09.14. 20 22 49

2018.09.16. 17 13 37Z

2018.09.16. 17 13 37Z

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Looking for Neptune – 2018-09-12

Neptune and Triton, I think

Neptune is not that hard to find, in theory. Add light blinding pollution, a not so accurate polar alignment and some passing clouds, and it becomes a PITA.

The other thing is, that IF the object I photographed is indeed Neptune AND Triton, the moon is off  compared to Stellarium. I intentionally photographed a reference star too, so I could put it on a map. However, the map itself is the DSS and some stars may have just moved away.

The gear: N 150/750, 2x Barlow and empty extension tubes, the ASI 224 MC camera, on the HEQ5 mount, in the city. 2018-09-11 22:26Z, ie 2018-09-12 1:26 local time.

(tovább…)

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Mars 2018-09-10

N 150/750, 2x Barlow, TS Optics ADC, 20cm extension tubes, ASI 224MC, PIPP, Registax, 1500 out of 20k frames.

Mars 2018-09-10

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20 Years

It’s been twenty years since one of my first entries in my log, and exactly twenty since the first (more like one of the first) Jupiter observation. Living at the very margin of my home town, with a full horizon east-south-west, and very poor public illumination characteristic of the post-communist era, I had a decent view of the night sky. I remember how I “discovered”  Jupiter as an odd star that’s not supposed to be there in the constellation, during the dawn. As time passed the star has risen, so I was able to observe its… satellites, so it was Jupiter. And this is the entry I made twenty years ago. However, checking it out now in Stellarium, I see that I missed Saturn. Jupiter’s satellites’ positions are ambiguous, it could be 21:45 or anytime till midnidght since the bino I used (12×25) most likely didn’t show Io that’s been close to Jupiter during those hours. The Moon came later, towards midnight, hence the datetime of the entry.

1998-09-10, clear sky, at about midnight: The first luminous one is Jupiter, and I’ve seen three of its satellites, and also some craters on the Moon.

1998.09.10. Csillagnapló-részlet

1998.09.10. Csillagnapló-részlet

 

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Saturn, Mars 2018-09-08

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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.).