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I've been puzzling over the bits of Virgo that are filled with galaxies on and off for the last three months & always seem to get lost and confused among barely-visible smudges in the eyepiece of my 127 Mak.
Whilst not the ideal galaxy hunting tool, I have really enjoyed views of M81 & M82 and the Leo Trio so figured I ought to at least be able to identify the whereabouts of some of the Virgo cluster even if there's no real features or structure to be even dimly seen with this aperture. To date I'd positively identified M86 & M84 and noted a couple of NGCs in the same field and other smudges within a couple of panning fields distant - but beyond that it was all "might be" in terms of identification.
There is I admit a part of me that is motivated to "tick off" Messier objects but I want to be positive on my identification, so with this in mind I hatched a plan to tour the area in a more structured way, inspired by this great thread on the topic from @MercianDabbler https://stargazerslounge.com/topic/375174-easter-2021-attempting-galaxies-with-an-sp102/?tab=comments#comment-4074628.
Recon sessions with the ST80 while the moon has been dominant over the last couple of weeks had led me to a chain of mini asterisms that I reckon I could follow from Vindemiatrix as a pathway to identify specific galaxies - even though they would be little more than un-resolvable fuzzy stars in my 'scope. I went as far as running through my star hopping "moves" a couple of times in Stellarium during the afternoon and making step by step instructions in my notebook (I find paper & a red headtorch easier in the field than trying to manipulate an App under a redlight). Saturday's forecast wasn't perfect for this purpose but looking ahead, looked like the only usable night for a while so I spent a happy few-bank holiday hours in the afternoon packing gear, charging batteries and prepping.
All observations with a Skywatcher Mak 127, Baader Hyperion 24mm (68 degree AFOV delivering a shade over 1 degree TFOV), Baader Neodymium Filter added for good luck!
Saturday May 1st /Sunday May 2nd was clear over Bortle-5 Winchester and seeing was very steady, transparency was fair and at times poor with high cloud building gradually to the SW by midnight when I set out. There were a couple of hours before the moon became a factor so I got to work aligning (Vega, Arcuturus) and slewing to Vindemiatrix.
Tracked a couple of fields of view (1 degree field) SSW to a faint "crown" of stars [Stellarium says HD111132 is at the head of the curve] which I've been calling mini-Corona and from there on W to a 4 star asterism with Rho Virginis at its centre which I've been calling the "plane" as it looks like a clear delta-wing shape (like an old dinky toy Dassault Mirage I had as a kid!)
M59/M60 - Put the "nose" of the plane in the centre-bottom of the field and pan up half a degree and there was M59 & M60, the first a dim fuzzy point, better in averted vision, the second notably brighter and with haze around a central point, could stand direct vision.
Putting the nose of the "plane" this time in the right hand side of the finder (RACI view on the Mak) and tracking a full field West brings the first of two pairs of stars in a just about horizontal line [Stellarium says these are HD109815, HD109684, HD109486, HD109401].
M58 - Putting the first pair of "the line" in the bottom R of the finder and tracking up 1/2 a field brought me a fuzzy patch with a star bottom R [later confirmed star as HD109771]
M89 - Putting the second pair of "the line" in the bottom R of the finder and tracking up just over a field, passing a small triangle of stars, brings in M89 - a fuzzy star, not much else to note.
M90 - Putting M89 in the bottom centre of the field brings in M90 in the top of the view, dim fuzzy but a bit more of a vertical line than a point this time. Makes a nice field with M89.
M87 - Placed M89 top R in field and swing W. M87 - not as bright as expected, nebulous patch, no detail to speak of.
M86 - Placed M87 in far R of field and tracked W I full field (1 degree) - quite apparent fuzz with brighter core - easier to see than M87 which is odd.
M84 - Placed M87 in far R of field and tracked W I full field (1 degree) - faint, best with averted vision when focussed on M86.
I then tracked one field of view NE of the M84/M86 view and this gives a really humbling view full of tiny fuzzy patches.
I made a rough sketch of a pronounced Scalene Triangle of resolvable stars [based on Stellarium I think these are three 10th Mag stars just into Coma Berenices, TYC 880-659-1, TYC 880 567-1, TYC 880 505-1, whatever that means...] with an elongated "M" shape of fuzzy blobs interweaving. I am not 100% sure which I was seeing but reckon given the slightly off transparency conditions I wasn't able to see as deep as the scope's limiting magnitude of 13.1 so am fairly sure I was looking at "The Eyes" - NGC 4435 & 4438 and then probably NGC 4459, NGC 4461, NGC 4473 & NGC 4477.
M56 - I was getting spots before the eyes by this time and noted that transparency was better behind me to the NE, I took a quick look straight down from Lyra & found M56, a fairly diffuse & dim globular that I am not at all sure I would have spotted had I not just spent a couple of hours tracking down the faintest of fuzz-patches!
Finally looking around I noticed Serpens looked clear and did an opportunistic GoTo for a quick look for M5 before calling it a night.
M5 - Wow! After all that faint stuff this is an absolute corker, tight globular and bright with faint diamond dust at 63x - although it was late I switched to the Baader Zoom & upped the magnification enjoying some super views at around 150x.
Decided to end on this stunner and returned home on a bit of a high for a glass of wine and some poring over the Cambridge Star Atlas and Stellarium on my phone to confirm sightings and then read up on some of the amazing objects I'd glimpsed. Tonight I'd upped my personal "distance record" to around 70 Million light years and was amazed to find that M56 is almost as old as the universe itself at 13.5 Billion years, and even better used to be part of something called the "Gaia Sausage" - who knew?
As often is the case I finished up by reading some of the history of the objects first categorisation, marvelling again at what Messier, Mechain and the Herschels achieved.
Mind blown again...Clear (dark) skies!
By Geordie mc
Skywatcher illuminated reticule eyepiece. It has a red crosshair pattern. I think it’s 24mm rather than the newer 12.5mm models. Great condition. Looking for £35 including postage from France. Thanks.
After family pizza night and an evening in front of the TV it was a bit of an effort of will to head out at midnight to my now regular rugby-field stance. However, it’s been a while since my last “proper” session with the Mak & I’ve been inspired to stick at it to find some fainter objects after recent reports in here so the urge “to boldly go” won out and I duly stumped off to the park with my big kitbag...
A dipping crescent moon with earth-light to the West & steady burning stars between translucent skeins of cirrus meant that by the time I’d walked-in & gone through the familiar set up & alignment routine (N. aligned Vega & Arcturus) I was mentally ready to hunt for some new targets.
Skywatcher Mak 127, Baader Hyperion 24mm, 68 degree (1.04 degree TFOV).
Thin high cirrus bands about with occasional patches of great transparency between. Seeing steady.
Align Vega, Arcturus - confirmed really good seeing outside of the thickest haze.
M13 - twinkly, looking good. Even at 63x points of light especially with averted vision.
Cor Caroli - split at 63x, lovely steady white pair with neat rings.
M63 - fuzzy core, wider nebulosity appeared with viewing time. Averted vision showed something brighter within/aligned [checking the charts I think this can only have been the galaxy’s core itself] “Perseus” shaped asterism at 5 o’clock in finder. Diagonal pair close to L in eyepiece.
M51 - twin cores! Dark Lane & some connecting glow. Narrow triangle asterism to upper right with brighter apex & faint pair as left hand base point [Stellarium confirmed these as around Mag 11.7 & they were reasonable bright points not “ghosts”]
Centred Vindemiatrix for Virgo tour - couldn’t pick 86 or 87 out of haze though so moved on.
Leo - M65 & 6 but no hamburger!
M95/6 probable but not a good view. Brighter star to L with faint twin at 11 o’clock
High cloud now getting quite generalised then noted a clear area around Lyra to NE.
[Switched to Baader Zoom 8-24mm.]
Epsilon Lyrae Double Double. Southerly star, secondary at 5 o’clock, dimmer/smaller than primary though not by a large margin.
Northerly star a closer pair & dimmer secondary at 1 o’clock. Best (& lovely) view 10mm, 150x dim star making triangle to lower R. Occasional views of other very faint stars, one on the “hypotenuse” & another in the middle of the triangle. Can’t immediately identify these in Stellarium however.
Haze by now all over & thickening.
By this time it was gone 2 am & quite cold. I packed away and as I did so a few holes appeared in the murk and gave way to aswathe of noctilucent mackerel sky through Cassiopeia and Eastward to a horizontal Cygnus & rising Aquila - the Summer Triangle pointing downward toward the South & East.
It was quite beautiful & still. I lingered a while & broke out the 10x50s for a quick sweep of the Milky Way parallel to the Northern horizon and up in to Hercules, marvelling at how bright the Great Globular looks in binoculars when fully dark adapted.
Highlights has to be M51 & Epsilon Lyrae but a really satisfying session on a patchy night that’s left me with that tired, mild euphoria I get the day following (is it just me?)
Hatching a plan to drive somewhere that gives me a better chance at Virgo to the SE, maybe tonight...
I am currently researching which setup to purchase as my first proper scope (once they are back in stock).
I thought I had settled on the Skywatcher Explorer 130ps AZ GTi but then I saw the Skywatcher Star Discovery 150i for just a little more money.
Could anyone please tell me the difference between the 2 OTA's (other than the different aperture size), and also the difference between the 2 mounts?
I realise that the AZ GTi can be modified to run in EQ mode whereas the Star Discovery can't.
Can the Star Discovery view all the way to the zenith or does the OTA catch the mount or tripod before it gets there?
I've been trying to image a couple of galaxies per night, one pre and one post flip. On early Saturday morning at 1:30am I changed over to M82, and acquired 63 x 3 mins subs, OSC, totalling 3 hours and 9 minutes of data.
Camera: ZWO 2600MC at -10 deg C, gain 100, offset 50
Telescope: Skywatcher 250PX (blue tube), 1200mm F4.7
Mount: Mesu e200
Guiding: ZWO OAGv2, 290MM, PHD2
Software: APT for capture, APP and PS for processing
I havent really had a chance to get much use out of this camera since I bought it in December, and I havent processed many OSC images before. I've a bit of work to do, but still very happy with the quality of the data for just 3 hours of integration time. I would like to add some Ha to this, but purposely didnt bother during the recent clear spell, as it was moonless nights and I gathered some broadband data on other targets instead.