, Fabio, David Marcoe Alessio Peralba we were at. There was some apprehension when the true 8, when Santo Stefano, the sky was heavily overcast. But when we arrived at high altitude at the foot of the mountain and the source of the Piave, the sky was already clean.
The night before there had been three other friends, finding a sky of 21.6-21.7. We were not so lucky. The sky was between 21.5 and 21.55. As you clean the horizon due south, leaving a glimmer of light pollution was not plain that much more intense dell'airglow Northwest. However, we did not observe a grand and progression of SQM (from 21.5 to 21:55). Most likely it depends on how light, with different weather conditions in the south, coming from the flat (and how much light arrives). It must be said that these values \u200b\u200binclude the Milky Way (since in practice the zenith, there was no way to exclude it with the normal SQM).
M33 was visible, not directly, but it was not too difficult. Knowing what to look for, you could even find the zodiacal band, and later came the zodiacal light.
temperature around 3 degrees (according to the SQM) 7 ° C according to the thermometer outside of my car. Alessio had a camper with which Providence has given us a half-night tea. So we went on until nearly 5.
The seeing ranged from bad to horrible, that added to the initial thermal problems (from 24 ° C of the house) did not allow good use of high magnification. With the pinpoint stars ETHOS 21 (160x with paracorr) but with the ETHOS 13 (265x), the point came and went (for example, undermining the view of the Cat's Eye).
Towards the end of the evening I also framed Jupiter. Wishing you could keep 10.5 (330X) and peering between the turbulence could also see many details. But it was not very funny.
Four telescopes: 60 cm, 45 cm, 40 cm and 30 cm and a small 80 mm refractor at the very large field.
I observed early in Cassiopeia. M52, Bubble Nebula (which looks like a kind of spiral arm), 7538 (diffuse nebula in another area). Then the open cluster 7510 with a clear triangular shape.
I liked the dwarf galaxy IC 10 , who appeared with a halo of light not well-defined, large, star-studded top.
7789 The cluster very rich in stars (also very bright in 60 cm) and Pacman (281). The
Saturn (7009) showed a sort of central body (the planet) apparently overexposed, and then the "rings". We wondered if someone, with the usual refractors magic ... would also see the dark cloud of cassini rings :-).
well solved the M92 I used to try paracorr: you put the globular to an edge and allowed to pass through the whole camp and enjoy the spectacle of stars that remain even point on the sideline ... and it is true!
M30 and Helix are followed in various sauces filters. M27 impressive object in the usual 60.Il handle very light and darker ears (if you want a little 'fantasy you could imagine the red - even though they are green). In the same 30 cm
seemed half the size and ears were less "dense".
Bello also globular nano dolphins in 7006, it was "almost" resolved into stars. I say almost because you could not shoot high magnification because the seeing. Even the cat's eye has suffered the seeing. Besides the beautiful galassietta 6503.
A quick comparison between 40 and 60 cm there was about 891. In general we can say that you can use magnification in proportion to the diameter (ie one and half times more) while maintaining the same evidence "of the object, seen as intensity superficiale. L'oggetto egualmente luminoso ma più grande mostra quindi più dettagli. Oppure si può usare un ingrandimento che sia una via di mezzo aumentando anche la luminosità dell'oggetto senza compromettere poi molto il numero di dettagli. In altre parole l'extra diametro lo si spende in parte come extra ingrandimento e in parte come extra luminosità superficiale.
E' poi venuto il turnbo di M76 (visibile anche l'alone debole esterno) e il doppio ammasso del Perseo.
Nel Cigno osservati Velo, Nord America, Pellicano e California (nel Perseo) con praticamente tutti i tipi di filtri. Questi grandi oggetti son apparsi molti bene nel loro insieme nel 30 cm a "soli" 50x (6 mm di pupilla di uscita).
M74 è stata observed in 45 and then in 60 cm. 45 In the halo of the galaxy was visible with some irregularities in 60 think you can say you saw (albeit with difficulty) spirals.
Finally (before closing with Jupiter) M1 in which I sought traces of the filaments that seemed to have seen the Giau, but I'm not sure having seen them.
notes David.
Here is a list of the objects observed with the 45-cm DOB:
I started with a pair of diffuse nebulae in Cepheus: Ced 214 and NGC 7822 both invisible to the 95x + UHC. Nearby is the large group of objects which belongs to M 52 of which have kept the 7538 (or planetary nebula?) As easy to 95x to 270x + UHC showed 2 or 3 overlapping stars, The Cave Nebula Sh2-155 has not been shown to 95x with neither UHC nor with the HB, but the Sh2-157 (about 1 ° S in the Bubble) I saw for the first aimed at 95x + UHC and had an arched shape; Nearby is the funny-shaped cluster NGC 7510 arrowhead. In Cassiopeia, to S Beta, there is a group of planetary composed of Abell 82 (ok to 95x and 150x + UHC + OIII with a few improvements) and Abell 84 (150x + OIII ok but weak) characterized by having right on the edge of a star. Also here's a quick look at the always spectacular (at 150x) open cluster NGC 7789. Two objects that are often forgotten two galaxies located between Cassiopeia and M 31: NGC 147 and NGC 185 95x visible to both the second much easier, in the same area a nice surprise was the galaxy NGC 278 (a big wad to 270x). I had some object in the constellation Aquila, including the pending planetary Abell 70 (which I have not seen but I did not have a precise map of the area), easy and beautiful NGC 6852 and Abell 55 that I had missed last year and this time I was able to detect a 150x + OIII. The beautiful galaxy NGC 253 (already visible in the finder) and at 150x + Deep-Sky filter showed enormous, a tapered shape, which bisects the field and some irregularities in the vicinity of the nucleus: I used the filter as it was positioned, low, the worst part of the sky and the DS has helped to darken a little 'the sky background, I have also seen them near the globular cluster NGC 288 which is shown fully resolved at 270x. Objects that have failed me, the infamous M 74 whose coils are difficult to capture good 45cm in fact you had to have much imagination to imagine and even 60cm, is sensed in averted but not seen so clearly: it may be that with the sky a little darker and with seeing better things will change. Among the memorabilia of the evening I wanted to point the best view ever of the 891 and the Helix with 60cm of Mauro, the resolution (finally) the edge of the globular 7006 (again with the 60cm) and the beautiful views of North America, IC 1318 and California in 30cm Alessio
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