I need guidance!

I really need to start taking my photography seriously now. The observatory is up and running, and there’s nothing to stop me from getting some guided mounts. Hell, I even know a guy that’s got some. I’ll see him tomorrow and try and arrange a meet up for a beer and a chat.
I’ve got some very unimpressive photos of M42 and the Andromeda Galaxy, (below) and they’re as good as I’ll ever get unless I get the camera on a guided mount.
It’s 2019 – the game’s afoot! I see spiral arms in my future!
And star trails will be no more!
M42.jpg

and

Comet 46P/Wirtanen

A short piece I did for my local society’s newsletter.
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46P/Wirtanen is a small short-period comet with a current orbital period of 5.4 years. It was discovered on January 17, 1948, by the American astronomer Carl Wirtanen, and expectations were high for the comet’s 2018 visit.

Many astronomers hoped for naked eye brightness reminiscent of 1997’s Hale Bopp, (which I remember seeing easily over the Albert Memorial from Queens Square, Wolverhampton. Hard to believe that was over twenty years ago!). Unfortunately, comet 46P/Wirtanen appeared fainter than hoped. At its closest approach, on the16th December 2018, it was only visible in binoculars from semi-rural sites. But even so, it gave amateur astronomers a fantastic, rare chance to study a comet.

With the new society observatory still being finely tuned, (and hopefully open to members to visit in January 2019), we’ve temporarily installed my 8” Skywatcher Reflector in the dome, and it was through this that I tracked the comet in the early hours on Monday 17th December. I took some very basic shots, with my Canon 750 DSLR attached directly to the scope with a T-mount.

The photos show the comet moving N N/W over a period of one hour twenty minutes. The comet was approx 11,580,000km away when I took these shots (only one second exposure time).

When you spend an evening observing, very few telescopic objects change in real time. Jupiter’s moons can change, and very often you see one disappear, or reappear from behind the disc. I’ve also seen lunar shadows creep across flat areas near mountainous regions near the terminator of the moon, and there’s oculations and eclipses, but even so, it’s rare to see something move in real time, astronomically.So it was a real treat to map, watch and image the comet’s path among the stars of Taurus on that Monday morning.
The comet will also be in the skies through January 2019.

Comet Wirtanen 16/17th Dec - 1
Comet Wirtanen 16/17th Dec – 1
Comet Wirtanen 16/17th Dec - 2
Comet Wirtanen 16/17th Dec – 2
Comet Wirtanen 16/17th Dec - 3
Comet Wirtanen 16/17th Dec – 3

 

 

Tales from the observatory

I’m going to try and finish my Elan Valley notes today. Until then, I’m putting up a few photos from the observatory in Shropshire. My telescope is in there now as a temporary measure, (the large dog needed cleaning and collimating, and needs the mount modified. A work in progress!). Picture one shows my 8″ scope in the dome,
Picture two is a half-second shot of M42, (showing some nice colours, I’m pleased, though clouds came over before I could better focus).
Thirdly, the open cluster M38 in Auriga, and another smaller cluster NGC 1907. I’m really pleased that my DSLR can pick up these Messier objects. I’ll look forward to clearer skies and getting my own shots of all the clusters in  Auriga and Gemini. I’d have managed it last night but I was thwarted by clouds.
(Note to self – Leaping Minnow asterism points to smiley face, and M38 is by the face’s right eye.)
Picture four shows detail of the waning moon taken Monday 26th.

Skywatcherindome

M42

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Theo-chain

Neptune update…

It’s  been three weeks now since my observing visit to the amazing Elan Valley, and I still haven’t written up my observations. It actually seems like such a gargantuan task that I’ve been putting off doing it – and yet I usually enjoy it!
Anyway, whilst browsing my photos I was pleased to see, in the corner of one shot, (I was actually taking a photo of Mars), I’ve captured Neptune again, with a 3.5 second exposure. The image isn’t good quality, I think perhaps due to the planet being right at the edge of the lens. But I can see it, and it’s clearly moved since my last picture.
At 7.85 mag, it’s the dimest major planet, and of course, the furthest, so it’s fun to be able to track its path through the outer reaches of our solar system.

Nep 1b

Neptune 18/10/18

Neptune29.10.18

 

Neptune in Aquarius

I’ve spent the last two nights over at the society’s new observatory. It’s not yet ready to be officially opened, but it’s getting there. Last night it was quite clear, and although there are issues with the scope, (which are hopefully solvable), it was good to see the sky clearing around 00.30 and the winter constellations rising. There’s a good chance it’ll be clear again tonight, so I may be writing up a binocular report soon.
Anyway, I was at the observatory with another society member, and we were looking for Neptune. The Moon was right by it, and only a few days away from full, so the planet was lost to the Moon’s glare. But I do have some pictures taken with my DSLR from earlier in the week. I’ve been watching Neptune for the past three or four weeks. It’s heading ‘eastwards’.
Here’s the star field view, which I find by star-hopping from the two rightmost stars in the square of Pegasus. Find those, then go down the same distance down, then go a bit further down . . . (not very scientific, I know, but it works for me..) and here’s the view…

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That’s with a 2.5 second exposure, f3.5 6400 ASA. A bit grainy, but it picks Neptune up…

B03

Zoomed in, and compared with a screen capture from Stellarium, the faint dot is confirmed as the remote planet…

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Cropped image from DSLR 50mm lens 18/102018 2.5 seconds f3.5 6400 ASA

B04

Stellarium screencap for 18/10/2018

Neptune is mag 7.9 through November. I’m hoping to get more photos to show its movement. I did the same with Jupiter earlier in the year, but now I have a better lens to do it with, (a 50mm Canon EF, it says on the side). As I said, it was lost to the glare of the Moon last night, and in the city it’d almost certainly be lost to the streetlight haze. The photos above I took from the A41, about seven miles from the city. I haven’t bothered putting the small 4″ on Neptune. Uranus displays only a small disc through a much larger telescope, so I doubt I’d see a disc through the little Skywatcher. The society’s 16″ mirror, on the other hand, might well present us with a disc, as soon as the mirror is cleaned!

One last shot of the Moon and Mars on the 18/10.2018. A very pretty sight indeed!

B01.jpg

International Astronomy Show 2018

I’ve been to the big Astronomy show in Warwickshire again today. I go every year and it’s one of my favourite days of the whole year.

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My favourite lecture was Andrew Coates talking about the search for life on Mars. He’s actually working on the space probe that’s going there in 2020.

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How clever is he? Check this out.

Professor Andrew Coates gained a BSc in Physics from UMIST in 1978, and MSc (1979) and D.Phil. (1982) in plasma physics from Oxford University. He has been at UCL’s Mullard Space Science Laboratory (MSSL) since 1982, with temporary positions at Max Planck Institute for Solar System Physics (Germany), University of Delaware (USA) and BBC World service (media fellowship). He is Deputy Director (solar system) at UCL-MSSL. Space involvements include the ExoMars 2020 rover where he leads the PanCam team, Cassini, leading the electron spectrometer team, Venus Express, Mars Express and Giotto.

Observation report 9/10/18

Here’s an observation report I wrote for the local society’s newsletter.

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We held another observation session at our Trysull site on the 9th October. The sky was 100% clear from clouds for once, with a slight haze in the air as the evening drew on. Half a dozen members turned up at various times, and we were lucky to enjoy a very comfortable, mild, Autumn evening’s observing.
Three scopes were in use tonight. Steve bought along his Skywaytcher ED80 refractor with a go-to mount, and Martyn bought his pillar-mounted 110mm reflector. I took my Skywatcher 8” Reflector, so we were lucky once again in being able to use a range of different scopes.

Steve, aligning the go-to mount
Steve, aligning the go-to mount
The telescopes
The telescopes
Saturn through the 8" Skywatcher
Saturn through the 8″ Skywatcher

The first obvious target was Saturn, as it was situated low in the sky, and heading lower, soon to be obscured by trees. We were looking at the planet through the worst possible conditions, as the cooling Earth created much turbulence in the air, and the low aspect meant we were looking through a lot of haze. But even so, it’s always a thrill to see the ringed planet. Its rings are currently quite open, and even in the worst conditions, it’s always a worthwhile telescope subject. With my Canon 750 DSLR on a T-ring, I shot about 40 seconds of film of Saturn through my 8” Skywatcher, which I stacked in Registax and although by current astrophotography standards it’s a poor planetary photograph, it’s a good representation of what we were able to see through our scopes this evening.
Mars dominated the South-west horizon. A few months after its closest approach, it’s still a superb, shining, salmon-pink beacon in the sky. Through our scopes we could clearly see the 90% phase, (which sparked much debate on planetary phases), and later on in the evening, as the air steadied, definite V-shaped markings were seen on the disc.
But our planetary observations were not over. On my ‘hit list’ in my observation book I’d written down Uranus, currently in Aires. But I was dismayed to see the constellation of Aries was lost in the Wolverhampton sky-glow six or seven miles away. Hardly any stars were visible through my finder-scope, so finding the icy world through my 8” mirror was going to be a task for another time. Luckily, Steve’s go-to scope saved the day, as it was able to navigate through the light pollution and offer up a fine view of the remote planet. It’s disc could be clearly seen, especially through the 4mm eyepiece, and we were thrilled to be able to add this elusive planet to our list of observed objects this evening. Whilst some might find the small blueish ‘dot’ underwhelming, it’s worth bearing in mind we’re looking far, far out into the coldest reaches of our solar system. This planet wasn’t discovered till a hundred years after Galileo saw Jupiter’s moons.
With the bright star Vega, and the constellation Lyra, right overhead, it seemed fitting to start our tour of Deep Sky Objects with the Ring Nebula, number 57 on Messier’s famous list. Luckily one member bought a set of very high quality eyepieces, and through a 6.7mm eyepiece and the 8” mirror the nebula appeared surprisingly bright and large, its nebulous structure easily seen.
Steve showed me NGC 457 (also known as the Owl Cluster, the ET Cluster, or Caldwell 13), which is an open star cluster in the constellation of Cassiopeia. This striking telescopic object can be imagined as a flying bird, or even Speilberg’s ET, with outstretched arms and bright, shining eyes.
M29 is an open cluster, prettily placed in a star field in Cygnus. We had a lovely view of it through the Skywatcher ED80. This telescope really has some fine optics.
Martyn, as usual, was seeking out double stars with his reflector. Both Almach (in Andromeda) and Albereo (in Cygnus) looked stunning tonight. The colour contrast easily visible. Both these double stars are similar, a bright golden star with a fainter blue companion.
Many times during the night we visited M31, and the best view came around 10.30pm through the ED80, when its companion galaxy M32 could be easily spotted, and the main galaxy itself was showing hints of structure. I can’t wait to get the society’s newly acquired 16” reflector on M31. Hopefully it won’t be too long.I’d been doing a lot of binocular observations over the summer, and M71 in Sagitta has eluded me every time. It should be very easy to find, the constellation is quite distinct and the object well placed almost between two stars, and Sagitta is right overhead. This evening, however, I was in luck, and we saw M71 in the 8” mirror. At first, we thought we were looking at faint nebulosity. Not so! After ten minutes, (and perhaps due to the dew on the eyepiece clearing), we were able to see it was in fact a quite dense star cluster. This was my favourite find of the evening, as I’d never seen it before, and I can understand now why there’s some contention about it being either a loose globular cluster, or a dense open cluster. I hope to visit it again under darker skies, it really is quite easy to find, as long as you have a clear enough sky and a capable telescope.

We looked at The Coathanger asterism in Vulpecula next, first through the finder-scope and the 10×50 binoculars, then the 8” mirror. This asterism is also known as Brocchis Cluster, or Collinder 399.

Other fine binocular targets tonight were the Pleiades and the Hyades, the well-known naked-eye open clusters that herald the oncoming winter, the latter rising around 9.30.

Other deep sky objects visited tonight were the Double Cluster in Perseus, (NGC 869 and NGC 884), which looked very pretty, and two of the brightest galaxies in Ursa Major – M81 and M82, (Bode’s Galaxy and its telescopic companion). These were quite faint tonight, but still we could see the shape of the galaxies. Bode’s being the brighter, face-on galaxy, and its fainter companion clearly cigar-shaped and edge on. Bode’s is 8.5 million light years away, (In comparison, the Andromeda galaxy is 2.2 million light years, our closest major galaxy).

We also enjoyed a fine view of the Alpha Persei Cluster, a very beautiful field of stars surrounding the giant star Merphak. This cluster is also known as Mellotte 20, or Collinder 39. we looked at this through Martyn’s 110mm reflector, but it’s also a very nice binocular object, and at only around 600 light years away, a far closer object than the distant galaxies we had previously been looking at!

The Go-To mount searched for Neptune. Was it one of the stars we saw in the field of view after the scope settled? Very possibly. It was hard to say, and without a star map to corroborate the view, we can only honestly say “we possibly saw Neptune”. I’ve always found the best way to find Neptune is under a very dark sky with 10×50 and a screen-grab from Stellarium, the free star-chart program. And even then, it’s a rather faint point of light. If Neptune is visible the next time we have a session, I’ll take a screen-grab beforehand.

I tried to find M103, a cluster in Cassiopeia, without luck, although I’d seen it through my binoculars earlier that week! When reading up about this cluster later, I found it can be quite underwhelming telescopically, so perhaps I’d seen it, and passed it over?

Auriga was rising after 10pm, but still too low to see the chain of star clusters. I did see the ‘Leaping Minnow’ asterism though, that can be used as a marker for the three M-numbered clusters in Auriga.

With Hercules riding high, M13 and M92 were easily viewable though. M13 being particularly bright tonight, with stars resolved around the edge.

As the evening wore on, the slight haze in the sky turned to mist, and we found our eyepieces dewing up, so after a coffee, courtesy of the village hall kitchen, we packed up our scopes and agreed it had been another productive observation session once again.

If you’re interested in attending an observation session, please give a committee member your mobile number and you’ll be put on the text notification list, and will be informed of every upcoming session.

References

Turn Left at Orion – Guy Consolmagno and Dan Davis. Cambridge Press 1989
Messier’s Nebula and Star Clusters – Kenneth Glyn Jones. Cambridge Press 1991