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Marvin Jenkins

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Everything posted by Marvin Jenkins

  1. I know just what you mean. Mine was three minutes which is pushing it on an NEQ5 and if you don't mind here is the end result. What do you think? Nothing done just a raw image.
  2. Rodd I love both of them. This is especially close to my heart as last night I took my first images of M31. If I can get close to your image one day I would be overjoyed. Marvin
  3. Just stumbled onto this thread. Great shot, you should be proud.
  4. Sometimes it makes me realise how far tech has come. Does anyone out there know when the first image of M42 was taken? It would be interesting to know when the image in this thread became roughly equal to professional efforts.
  5. Just finished reading the book Big Bang. I think I understood about a quarter of it. Your explanation of neutrino bursts from the sn makes me realise I need to read it again.
  6. It seemed like a silly question when I posted it, but this is very interesting and I definitely did not expect the difference of options. Was expecting ‘don’t be silly’ but I guess we are all a little in the dark when it comes to the real effects of Super Nova. On a personal note I have decided to view Betelgeuse with my left eye. If I get blinded by the explosion I have saved my ep eye of choice. Marvin
  7. I think that is a great result, considering that it is in effect a holiday point and shoot camera on a bracket clamped to the eye piece. In my opinion you have done very well. My own personal favourite is a moon shot I have using a Sony Cybershot in the same bracket as yours. It is my screen saver and I have been asked from where did I download it. Makes me smile. Marvin
  8. Welcome to astronomy b#####s. I have lost count of the amount of times I have laboriously pin pointed Polaris in the polar scope, adjusted for Polaris off set using the syn scan app, for the first star of choice given by the hand set to be so far out it is in another constellation!!! Drives me mad to the point that when the hand set asks to align to first star I always scroll to second or third option in the list as this ends up being more accurate. Just to prove myself wrong I have calibrated my polar scope and use an illuminated reticule eye piece and first star is always way out. Marv
  9. Rocked it dude. I have viewed Uranus once in the ep. Your pictures show far more than my eye ball could ever capture. Keep up the good work, gives me something to aim at in the distant future.
  10. Last night I was fortunate to get a second evenings Lunar observation, after missing the 7th due to complete cloud cover. I started with the most northern crater on the terminator which turned out to be Babbage, showing a crisp pock marked crater in the floor. Right next door Pythagoras with it’s central peak full of contrast. There appears to be a heart shaped structure joining the north wall of Pythagoras. I think it is the crater complex Anaximander finishing with Carpenter but hard to tell right on the edge. It is noticeable compared to the other craters that Pythagoras seems worn and badly erroded. J Herschel, very hard to see. A crater in the n/e wall and a pin prick post mark in the crater floor. Moving south to Aristarchus (pure white) plus Herodotus. I can now see Schroters valley, initial description ‘like a fish hook coming out of the mouth of the north wall of the second crater. At first I got confused for a few minutes thinking I was looking at Reiner and Reiner Gamma. Then I noticed the rock outcrop east and realised it was Montes Harbinger from the session on the 6th. Now I know where I am! West on the terminator to Selencus the shadow line directs it perfectly. A long wrinkle ridge glances Selencus east wall and continues to the Montes Agricola, I ponder if it is a wrinkle ridge as it is so straite, perhaps an ejector ray from a crater on the dark side? Schiaparelli has a large ridge that seems to fork at the crater. Moving south again, Hevelius with north companion Cavalerius appearing to clip the north wall of the larger crater, Cavalerius split black and white right down the middle. Hevelius showing a small sharp pointed peak, the floor has lumps and structure in the crater side wall. Looks a strait line on the outside of the eastern wall (map says rilles) going to need higher mag so I will come back this way later. Grimaldi is a monster with very complex crater walls, but really smooth on the crater floor like untouched Maria. The walls look eroded to the point of being blasted. Extremely rocky with what appears to be mountainous structure. Sirsalis, two overlapping equal craters, the older one clearly far more eroded. There appears to be lots of complex structure surrounding that area. Darwin, hard to identify. Appears to be a solid black figure of eight, so may be a double crater with collapsed joining wall? Cruder nearby and seems so shallow. Finished with Schickard which was not spectacular at this time. Time to up the magnification and head back to Aristarchus and Schroters valley. Now using a 10mm ep the valley looks like the letter W written by left hand (I am right handed) part way down the valley there looks like a split with one continuing onto to two small equal size craters. In moments of complete stillness this structure really blows me away. The central peak of Aristarchus is now visible and the wrinkle ridge/ray question is answered, it seems to be a massively long wrinkle ridge. I pushed it a bit further with a Barlow, but it seemed to amplify the seeing problems. After an hour or a touch more I decide to pack away and have a look at the Lunar 100 list that I keep hearing about Marvin
  11. Apologies if this is in the wrong place, mods please feel to move it to the right heading. Now this may sound silly, but if I were to be viewing Betelgeuse with my 150 pds at the moment the light from it’s supernova explosion reaches Earth would I be in any physical danger of eyesight damage. I thought don’t be rediculous, but after talking with an astronomer far more knowledgeable than I, his description made me wonder. I have read about a potential second sun in the sky, weak daylight on earth at night. I did initially think it wouldn’t be any worse than viewing the moon but it dawned on me that it is a concentrated point of light not soft reflected light from a surface. I ask this as we are aware of the dimming at present so perhaps we are getting close. Marvin
  12. I am still building up my kit so I haven’t got the better quality filters stage just yet. Decent set of eye pieces next then a couple of quality filters to compliment them. Hopefully get there by the middle of summer. I use the ND as it came as a package with my box of Orion plossles.
  13. I have always used a moon filter unless viewing a small crescent. I just find the image too bright. Last night I had an hour of Lunar viewing very near to full moon. I have just started the Lunar 100 so I have head torch on red light to use a handheld moon map, my right hand holds my phone so I can use the voice recorder and I view with my right eye. After an hour I can barely see straight to change ep’s. Without an ND filter I don’t think I would last ten minutes.
  14. I used to collect stamps when I was kid as my uncle was an airline pilot and would send me mint stamps from places he flew too. I gave it all away when I was sixteen but only regret one loss. A post card of Apollo 11 with Apollo stamp posted to my dad from Cape Canaveral on the day that the moon shot took off. I have an empty place in my heart for that loss now I love astronomy. Marv
  15. Been out. Just come back in a lot warmer than my Jan 6th Lunar session. Such a shame Jan 7th was clouded out as yesterday was Schroters valley day. It was showing, but not ‘showing off’. Can’t complain as I have just embarked on the Lunar 100. Why do so many of us get embroiled in lists? I love them and hate them all at the same time. Marv
  16. Been out, froze all my externals, but got an hour viewing the moon. Just posted in Observing Lunar, where else. Seriously though I don’t do much moon stuff but there has been so little astronomy for me since October I can’t miss any opportunities. Marv
  17. I am not going to beat on about the weather but I will say that my last decent clear night was early October! Also lets not mention the clear night that featured the meteor shower that never was. Tonight it has been clear and I thought I have to do a Lunar session at least as it has been so long and right now we are fogged out by ten pm. I set up the EQ5 with the 150pds in daylight and waited for dusk. It was pretty much dark by six pm so I got it all pointed in the right direction and dived in. Now in my previous sessions I have tried to take notes using paper and pen, so much moisture the paper is useless in twenty minutes. Yesterday I found out I have a voice recorder on my phone and decided to use that. The biggest question... do I really sound like Steptoe? Seems so. Started with a 25mm plossle, and I am happy with the initial view of the clear dark Maria floors. Copernicus and Aristillus showing bright white rays. Mare Imbrium is just incredible. Sinus Iridum could not be better, the terminator just behind the Montes Jura. Crater Bianchini so stark and defined. Can’t see wrinkle ridges yet, but right there in Mare Imbrium two small equal size craters of Le Verrier and Helicon. A really noticeable feature of the Jura mountains is the final peak on the south end near the Luna 17 site. Looks like a single peak casting a black shadow. Moving south to a crater with bright white ray system, I look it up on my small moon map, it is Aristarchus. It is right on the terminator, I don’t think it is possible for there to be that much contrast. The crater is cut clean in half, total black with the west wall completely illuminated. Sadly Valois Schroteri is in darkness. Close by and showing shadows are Montes Harbinger. I keep moving south through Oceanus Procellarum and Crater Letronne takes my breath away, my moon map does not do that justice. A touch more than half a crater with a flooded floor. Farther south crater Mersenius to the west of Mare Humorum is really showing off, incredible contrast. Cassendi is the star of the show, clearly visible a central mountain peak. I can see that the north wall has been struck leaving a perfect poc mark. A lot farther south an elongated crater really catches my eye, I think it is Schiller. There are so many craters in the south that it is hard to tell. Back to Mare Humorum and what appears to be a crater opposite Cassendi, it is Vitello. I keep looking and I realises that it is one of a complex of three craters that look like horse shoes side by side as they appear to be missing there north walls. I pop in the 17mm ep and notice that the west side of Humorum shows some fascinating structure. It looks a little like the lava floor has been pushed up into the Mare wall. I wonder if it is collapsed terracing form overlapping craters? I look it up after the session and appears to be Rimae Mersenius, A first for me as I had never heard of it. Time to go all out and use the 10mm. The central peak of Letronne now showing and I can just make out two small bright craters on the flooded floor either side of the central mountain. I am just starting to see some wrinkle detail on the floor of Mare Humorum but that dreaded fog is starting to come in and it is already below zero so I pack up and cuddle the log burner for a while. I can’t believe how much detail there is to be had with a relatively small scopes. I will be reminding myself to ‘do Lunar’ once in a while instead of moaning about it getting in the way of Messier hunting. Happy crater hunting to you all. Marvin
  18. To use a phrase I heard recently “that’s crisp, like Walkers”.
  19. Thank you for the link, very interesting. I am aware of this phenomenon but the comparison of Plato A between the two pictures LAC and hi res are radically different. My guess is that the LAC image uses data from over lapping images so the complete print has resolution from edge to edge. My second guess is that the hi res picture lacks definition towards it corners as the centre is so crisp. M
  20. Plato A still looks like a ginger bread star (keeping it in the Christmas spirit)
  21. Amazing accuracy, takes my breath away. I have noticed one curious thing that has me puzzled. Where in the hi res picture is Plato A? There is clearly something there but it looks like a low lying mountain. There seems to be no crater structure at all and it it clearly shown on the LAC chart along with what looks like a fault line like rupes rector. M
  22. Don’t want to get anyone’s backs up as I have replied to a thread about cone error on an EQ6 mount in the not to distant past that needed moderator imput, in this section. My question is, that this thread is posted in the beginners section. I realise that the heading getting started with equipment help and advice applies to dan-adi’s question. The level of technical know how and mention of observatory doesn’t seem in keeping with ‘beginner’ I may be wrong, but it seems to sit more comfortably in the equipment section about mounts. I was a beginner two years ago and most of this thread I do not understand now. Heaven only knows what a beginner/new member of this forum must think. I may be wrong but I am happy to take opinion. Marvin
  23. Oh no, not again Gina. I feel so bad saying this as technically it should be in the observing thread. Just come back in from my first session without a full moon in two months! Conditions were actually rubbish with a tiny thin overcast amplifying distant light pollution. But after two months I feel like I hit the jackpot. Didn’t bother with polar alignment. Didn’t bother with power, Didn’t bother with Goto. I got one hour... just cast around. First time out with my 150pds, M31 M32 M101 in the same ep for the first time. M42 three main stars in the trapezium and a fourth lesser magnitude. Some open clusters to finish below Cassiopeia. According to the forecast that is it for me for 2019. I hope you get a clear night to see out this year. Merry Christmas and a happy new year Gina.
  24. Thank you Maniek, for starting this thread. Many links and invaluable tit bits of info. If it is clear I am going to get up early tomorrow and do a Lunar excursion off the back of all this. Marv
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