Category Archives: Herschel 400

Observing 3rd/4th September 2010

Another clear night, another observing session. That’s four in a week! I missed a couple of nights over the course of the week as they were murky and foggy and therefore no good for deep sky observing. Last night started off a little murky but gradually improved as the night went on.

Date: 3rd/4th September 2010
Conditions: Cool but not that chilly, a bit murky at first but improving later. No Moon. Started off clear, clouding over later.
Seeing: A I, superb.
Transparency: III, improving to II later (until clouds came)
NELM: 6.1 to 6.5 later on
Instrument: 12″ f/5 dobsonian, 22mm Televue Panoptic (69x), 15mm Televue Plossl (101x), 8mm Televue Radian (190x), 5mm Radian (304x), OIII filter

NGC 6804, galaxy in Aquila – Faint, slightly oval, stellar core. 69x, 190x

NGC 6772, planetary nebula in Aquila – I wasted more than 30 minutes looking for this (not plotted on atlases) and eventually gave up. Annoying. Will have another go at this with a MegaStar chart I’ve just printed out.

NGC 7448, galaxy in Pegasus – Bright, elongated NW-SE. Brightens gradually towards the centre. 69x, 190x

NGC 7814, galaxy in Pegasus – Bright and easy to find, located near ϒ Peg. Elongated NW-SE. Brightens towards the core which is bright but not stellar. 69x, 190x

NGC 7217, galaxy in Pegasus – Bright, round, condenses to bright but non-stellar core. 69x, 190x

Pegasus is now complete as far as the H400 is concerned, as I’d already observed some objects in it last autumn.

NGC 7686, open cluster in Andromeda – Irregular. Dominated by two bright yellow-orange stars. Loose. Fainter stars in background and around the two bright ones. Not particularly rich. 69x.

NGC 884 and 869 – the Double Cluster in Perseus – These are lovely things in a wide field eyepiece. Both clusters fit neatly into the field of view of my 22mm Panoptic (69x). If each one was isolated it would be a pretty object in its own right but, both together make one of the finest DSOs in the Northern Hemisphere – in fact the DC is (are) the best open cluster(s) in the sky and I genuinely think that we outdo the Southern Hemisphere with this one.
NGC 869 is smaller and more compact that its neighbour, 884. There are 2 bright stars in the centre, plus a compact triangular pattern of stars in the centre. 69x
NGC 884 is larger and looser. No central group of stars, unlike 869; there’s empty space at the centre. The stars of 884 are more concentrated to the western side. 69x.
All stars in both clusters are white.

NGC 650-1 (M76), planetary nebula in Perseus – Very bright indeed, looking like a miniature M27 (in fact, it is called ‘Little Dumbell’). It has a bi-lobed appearance with an outer shell extending off to the south west and north east; the south western one is slightly brighter. The south eastern lobe is slightly brighter but smaller, than the north western one.  An OIII filter brings it out nicely. 69x, 101x, OIII filter.

NGC 1023, galaxy in Perseus – Bright, elongated east-west. Condenses to very bright core. 69x, 101x

By this time, it was beginning to get very cloudy, so much so they were interfering with observing. In fact it took me several attempts to see NGC 1023 as cloud kept drifting across the field of view.
I finished the session with a look at Jupiter, which was shining incredibly brightly, like a searchlight, high in the south east. While I am not a planet observer, preferring deep sky, I was glad I had decided to look at the giant planet because the seeing was so good, in fact it was perfect, that I had incredible views and could put the magnification up to 304x without too much degradation of the image.
The North Equatorial Belt was detailed, while the STB was a bit fainter and there were festoons in some of the other bands on the planet; the North Temperate Belt showed a lot of detail, as did both polar regions. The zones also showed some marbling. The SEB, of course, is still missing or very faint.

Observing 14th April 2010

Conditions:
Seeing II
Transparency III-IV – pretty ‘milky’ with some light scatter
Still, with no wind., although the slightest of breezes sprang up later.
Instrument: 12 inch f5 Dobsonian, 22mm Televue Panoptic (69x), 15mm Televue Plossl (101x), 8mm Televue Radian (190x), Lumicon OIII filter.
As the skies were really murky, and Virgo was washed out by the murk and a lot of light scatter in that direction, I decided to go to Draco for the Herschel 400 objects (and others) there instead. Things were a little awkward as Ursa Major was upside down and the charts difficult to relate to the sky without turning them upside down.
NGC 5866: Bright, fairly small. Elongated n-s, brightens gradually towards a diffuse centre. Bright star on one end and a slightly dimmer star on western edge. Dust lane? 190x
NGC 5907: Very thin, edge-on galaxy. Not much of a nuclear bulge, if any. Fairly faint, elongated n-s, quite large, stretching across field of view at 101x. 69x, 101x
NGC 5985: Very small and bright. Oval. Bright core, elongated n-s. 190x
NGC 5982: Very large oval galaxy, evenly bright, no brightening to middle. Slightly elongated, not face on. Looks like smudge or thumbprint. Very faint, not much brighter than background sky. 190x.
NGC 6543: Very bright and blue planetary nebula, even without the OIII filter. This was fairly easy to find, although at first I thought it would be too low, as the stars I was using to hop to it weren’t that far above the trees in next door’s garden. The OIII filter really brings it out. Small and round. Slightly fuzzy and definitely non-stellar at 69x.
At 190x it is uniformly bright with the middle being no brighter than the surrounding halo. No darkening anywhere within the nebula. 69x, 190x, OIII filter.
NGC 3147: This took a bit of finding, I had to star hop to it, using galaxies, rather than stars. I began with the easy to find M81/82 and went from there. 
Bright, round, with bright nucleus. 190x.

Because of work the next morning, I packed up at midnight BST. For a short session, it was a pretty good one, and I don’t have to return to Draco for any Herschel 400 objects.

Observing April 11th and 12th 2010

At last! A clear night – or was it? It certainly began promisingly enough with the skies clearing off so I set up just before sunset in the hope that I’d get some observing done.
Unfortunately this state of affairs didn’t last long and after the session began drifting clouds appeared and, as if in a devious conspiracy, they sat right where I aimed my scope. It seemed that when I moved to a different part of the sky they followed!
However, despite this, I managed to see the grand total of three objects on my H400 list.
Conditions:
Chilly +4C
Seeing III, Trans IV – Drifting clouds interfereing with observing, plus some high cirrus stuff
NELM 6.0
Instrument: 12 inch f5 Dobsonian; 22mm Televue Panoptic (69x), 15mm Televue Plossl (101x), 8mm Televue Radian (190x), Lumicon OIII filter
NGC 2392 – planetary nebula in Gemini: Easy to find. At 69x it’s round, fuzzy with bright middle. It’s a greenish-blue colour. OIII brings it out well. At 190x it looks very fuzzy with a very bright centre and a dark area between outer parts and centre. 69x, 190x OIII
NGC 2420 – open cluster in Gemini: Nice, fairly small o.c. Very rich and moderately bright. Irregular shape with c. 30 bright stars on a nebulous background which is many many unresolved stars. The brighter stars are all the same, or similar, brightnesses. 69x, 101x
NGC 5194 and NGC 5195 – galaxies in Canes Venatici: Fantastic. NGC 5194 (aka M51) is a large, face-on spiral. Spiral structure is easily seen and it has a big, bright nucleus.
The companion, NGC 5195, is much smaller. Round with a halo surrounding a bright core. 69x, 101x.

At this point, the clouds were becoming more than just an irritation, they were becoming a damned nuisance, so I packed in. As I came back outside to pick up the scope base, the clouds had filled the sky.

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The following night, 12th April, wasn’t totally clear, so I didn’t even bother carrying the scope out but, instead, decided to bag Melotte 111, the Coma Star Cluster, with my 8×42 binoculars. Mel 111 is on the AL Binocular Deep Sky list, which, apart from four objects in Cepheus and Lacerta, I have just about finished.
Easily seen with the naked eye, this huge open cluster is pretty spectacular in binoculars. It is harp-shaped, with 15 bright stars outlining the shape of the harp. There are many more fainter stars in among the brighter ones. The stars are all blue-white and the brightest ones all the same magnitude. Nice.

Observing, April 8th 2010

The first clear night in April so far that I was able to observe. While I am a deep sky observer, I do like to look at the planets now and then and it would be a shame to ignore Mercury when it is favourably placed as it is at present. Both Venus and Mercury are low in the western sky just after sunset and, through my birdwatching spotting scope, I saw Mercury as a disk. I also took a couple of – bad – photos with my Canon 40D and 400mm lens, one of which is this one. I labeled it as Mercury doesn’t show up that well (click for larger picture):

By the time I’d finished messing around with planets and finished setting up the scope and gathering all the observing bits and pieces together it was time to observe. Unfortunately it wasn’t as clear as it promised, with a very thin haze which scattered light around, making the naked eye limiting magnitude a very poor 5.8 to 6.0.
Conditions:
Clear, but with a very high thin haze.
Cool: +6C, down to +2C later.
Very slight breeze now and then
Seeing: Ant II; Transparency: III
NELM: 5.8 to 6.0 due to light scatter caused by haze – poor for here.
Instrument: 12 inch f5 Dob, 22mm Televue Panoptic (69x), 15mm Televue Plossl (101x), 11mm Televue Plossl (138x), conditions not good enough for higher magnifications.
I spent most of the session in and around Ursa Major which is rich in galaxies but no so rich that you’re overwhelmed by sheer numbers of the things, which is the case once you get into Virgo and Coma B. All these observations are of galaxies.
NGC 3613 UMa: roundish, fainter than 3619 (which is in same f.o.v at 69x) with a much fainter core. Well defined against the sky.
NGC 3619 UMa: Bright, oval, small. Well defined. Bright core.
NGC 3610 UMa: Small, bright and round. Bright core.
NGC 3556 (M108) UMa: Yep, a Messier, but this has shown up on the H400 list, so here it is – Large, almost edge-on. Can see dust lane. Star superimposed on top of galaxy; it looks like a stellar core, but isn’t.
NGC 3982 UMa: Not quite round. Bright. Bright core surrounded by halo.
NGC 3972 UMa. In same field of view as 3982, but much fainter. Elongated. brightens somewhat towards centre.
NGC 3998 UMa: Much larger than previous two galaxies. Round with some brightening towards centre.
NGC 3992 (M109) UMa: Large, oval and featureless. Uniformly bright with three foreground stars superimposed on it. Quite boring, really.
NGC 3953 UMa: This one is very nice. It is large, elongated north-south and is bright. It also has a large nucleus which is brighter than the surrounding galaxy.
NGC 4026 UMa: Bright, elongated NE-SW. Lovely edge-on spiral with a very bright nuclear bulge.
NGC 3729 and NGC 3718 UMa: These make a nice pair. Both are oval and pretty faint, although easy to find. Both are uniformly bright with no hint of a nucleus. 3729 is the larger one of the two galaxies. Hickson 56 is nearby but the crap hazy conditions made this invisible.
NGC 3631 UMa: Round with bright compact core. Pretty large and pretty bright. Bit of a bugger to find though, due to its location out on its own, just below the Dipper bowl. Hint of spiral structure with averted vision.
NGC 4565 Com: A perennial favourite! This is an edge-on spiral and is spectacular to look at. At 138x it stretches right across the field of view. Very bright with very bright nuclear bulge and a very prominent dust lane which cuts it in two.
NGC 4494 Com: Near 4565 this is another bright galaxy. Round with bright core.
NGC 4448 Com: Located just off the apex of Mel 111 (the Coma Berenices Star Cluster) this is a bright not-quite-edge-on galaxy. Nice bright compact core. Elongated east-west.
NGC 4559 Com: Large spindle-shaped even glow. Well defined against background sky.
NGC 4278 Com: In same f.o.v at 69x as NGC 4283. One is elongated and brightens towards its centre and the other is smaller, brighter, rounder and has a more compact core.
NGC 4274 Com: Bright oval. Almost edge on. Brighter middle.
By this time it was getting late, thanks to that thief of observing time BST. As I had to be up at 6am for work, it was time to pack up and head in.

At the Isle of Wight Star Party back last month, Owen Brazell was selling off a few spare eyepieces, which he’d replaced with Televue Ethoses and I bought a very nice 22mm Panoptic from him, which has now become my main ‘searching’ eyepiece. The barrel is scratched but the e.p. is in otherwise excellent condition and it has replaced the 20mm and 25mm Televue Plossls in my collection – now I have two redundant eyepieces!

Herschel 400 blog

I have finally got round to updating my Herschel 400 observations on the separate blog created specially for this project. I last updated it in September, so I had a few things to add into it. I was considering deleting that blog, but have decided to keep it going as it helps me keep track of what I have seen and when. I’ll eventually do what I do with all my observations, type them out and print them off to put into a ring binder.

Herschel 400 blog