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venus's phases with the naked eye.

Discussion in 'General Astronomy Chat' started by kevan hubbard, Feb 7, 2017.

venus's phases with the naked eye.

Started by kevan hubbard on Feb 7, 2017 at 12:56 PM

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  1. Mak the Night

    Mak the Night Well-Known Member

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    I don't know anything about Towa scopes, I found this on You Tube though.

     
  2. Zigarro

    Zigarro Well-Known Member

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    Woah! Those vid images certainly are encouraging! I may take it out tonight to see what it can do, although, the one in that vid is a few steps above mine. Thanks Mak!
     
  3. Mak the Night

    Mak the Night Well-Known Member

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    If you could use it with a diagonal it might be interesting. The doublet is probably decent quality. I don't know about the eyepiece though.
     
  4. Zigarro

    Zigarro Well-Known Member

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    Yeah pity that, but it is what it is. Still, it's fun to have something to drag out in daylight and make the neighbors suspicious!
     
  5. Mak the Night

    Mak the Night Well-Known Member

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    Yeah, it's worth it for that alone lol.
     
  6. kevan hubbard

    kevan hubbard Well-Known Member

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    I think to paraphrase the x files "I want to believe" so people with the best intentions can fool themselves into thinking they've seen something I put reports of seeing Neptune and m81 with the naked eye into that category but things like naked eye viewings of Venus's phases, Jupiter's moons,Uranus, m33,m3,m15,m2,etc,I'd say are very very difficult but not impossible. I liked those old Japanese binoculars look like a copy of a Zeiss model?what kind of views do they give of the heavens? In the 1950s Japan had a reputation for producing cheap junk but I think this was a stop gap to recover from war damage. Japan was one of the first Asiatic nations to industrialise and remember that they beat Russia in 1904 although the age of the Russian fleet and the fact that the English and French closed the Suez canal to Russia causing them to sail via cape town can't have helped the Russian cause?
     
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  7. Mak the Night

    Mak the Night Well-Known Member

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    Those old 'Japanese binoculars' are actual Carl Zeiss Jena binoculars. In the early 1960's my dad bought them off some bloke who had bought them new a few years before WWII started in 1939. He told my dad that he used to watch daylight Luftwaffe bomber streams with them on their way to bombing the industrial Midlands. He also claimed that he could see RAF fighters dog fighting German fighter planes miles up in the sky with the binoculars.

    They're not bad for astronomy. They are wide angle 8x30. The lenses are uncoated but the views are crisp, bright and well defined. The wide angle aspect really sets them apart though. The body of the binoculars are metal and they aren't light like more modern models. The Moon looks quite detailed at 8x and Venusian phases can regularly be perceived. I find them good for sweeping star fields and the Milky Way. Due to the limited range and dexterity in my right arm I find binoculars difficult to use now though.
     
    Last edited: Feb 9, 2017
  8. Dave In Vermont

    Dave In Vermont Well-Known Member

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    Thank you for posting the photo's, Ziggaro! Paydirt! It's a bouncing, baby Carton "Towa!"

    Why can't I get this Pdf. to load...?

    I'll be back...

    Okay - this means that little Towa-branded scope has the same basic pedigree as a Unitron or Edscorp from the 1960's! That was a great gift from your neighbor indeed! An old neighbor of mine gave me a 60mm Japanese telescope when I was around 11. And that fueled my fire for pursuing astronomy from age 4 to now.

    My 60mm had but one eyepiece - a 12.5mm Huygens - which was .965" as was it's 90° diagonal. I would scare the daylights' out of my parents every clear-night by climbing out a window in the attic of our big, old house in the woods and ascend upwards with scope & tripod in hand. Setting-up with on side of the little tripod on one side of the ridge atop the roof - the other over the other side of the ridge. And there, laying on my stomach on the sloped, shingle roof, I uncannily found Jupiter in my first try on a bright 'star!' It's equatorial-bands and four Moons leaped from the eyepiece! This was pure serpendipity:

    At age 4, my parents took me to the Boston Museum of Science. I don't know why - they hated science - but I went to the planetarium there in 1964. I was thrilled! And that night I had a vivid dream about Jupiter. It ended-up with Jupiter floating in my neighbor's little fish-pond in their backyard! Something 'clicked' and soon I learned to read - my first set of books were the Encyclopedia Britannica Aardvark to Zygote - and I devoured all-things-astronomy. Then to our well-stocked town-library just outside of Boston.

    I remembered that dream (today, too) as Jupiter flew from the Huygen's EP. The first celestial object I'd ever seen through a telescope.

    To keep themselves from going mad with worry of my nighttime forays to the roof, I requested an Edscorp 3" F/15 refractor - far too big to get through the attic-window with - and my wish was granted. It had the worst equatorial-mount made on Earth, but nothing dismayed me - and armed with charts and books - I taught myself how to star-hop my way around the sky. Epsilon Lyrae (the famous 'Double-Double') became a favorite sight - which I split with a nudge over 180X from my 6mm Ramsden eyepiece - 187.5X. Pinning away for an orthoscopic or 10, I was hooked!

    Thanks for posting those images! Look what my neighbor's did to me! :eek: :D

    Dave
     

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    Last edited: Feb 9, 2017
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  9. kevan hubbard

    kevan hubbard Well-Known Member

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    I should have spotted those where the Zeiss ones not the Japanese ww1 binoculars. Using German binoculars to spot German enemy aircraft! Hitler wouldn't have been very happy!after ww2 the Zeiss company became split into two,part in West Germany (FDR) and part in East Germany (GDR) but both made high quality stuff. I don't think the two companies merged when the two Germany's merged (well 3 if you count West Berlin which was not really part of the FDR but a sort of city state heavily involved with the FDR).
     
  10. Mak the Night

    Mak the Night Well-Known Member

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    Yeah, I think if the Luftwaffe had been more successful Goering would have probably repatriated the binoculars lol. He had other problems apparently though ...

    Hurricane Mk1 R4118.jpg
    Spitfire MH434.jpg

    ... these mainly lol (Wikipedia).
     
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  11. Zigarro

    Zigarro Well-Known Member

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    Great story! I still have the full set of Enc/Brit. including the huge atlas, in the original wood cabinet that my parents bought in 1957. That atlas (naturally) has the world as it looked then- up to a post war map of partitioned Germany. Even with access to the Net, I still refer to those books now & again.
    My earliest memory of the heavens is laying on my back in the ultra-dark yard of my Grandpa's farm, watching for Sputnik, Explorer, and later- Telstar. < Those babies were huge news back then!
     
  12. Mak the Night

    Mak the Night Well-Known Member

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    I've just (17:15 GMT) been observing Venus with the naked eye, the Carl Zeiss binoculars and a 90mm Mak (f/11) at 40x.

    17 27.jpg

    With the naked eye, after only a few moments, the phase can be perceived. I do have some experience in doing this though, plus I live in a Bortle 2/3 area 152 metres above MSL.

    waiting for venus too.jpg

    The phase is obvious through the binoculars and the Mak.

    Edit: I can see Mars with the naked eye now (17:40 GMT), I can't detect Martian phases with the naked eye. It can be perceived at 40x.
     
    Last edited: Feb 10, 2017
  13. Zigarro

    Zigarro Well-Known Member

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    That little Mak looks like fun! Do you often view thru the window?
     
  14. Mak the Night

    Mak the Night Well-Known Member

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    It's an Omegon MightyMak (also marketed as the Kasai Pico) I have no idea who the OEM is. It's OK but it isn't in the same league as the Synta-built Mak's (Celestron, Sky-Watcher, Orion and Levenhuk). The main problem seems to be collimation above about 60x. I just can't get a sharp image above that. I've more or less replaced it with the Orion StarMax which I can mount on a Porta II with a Vixen Hal heavy duty tripod (below).
    Vixen Hal Tripod - 2.jpg

    Unlike the Omegon Mak, the Orion Mak has a dovetail enabling it to be mounted into a Vixen mount on the left of the dovetail ensuring the finder shoe is at the eleven o'clock position.

    Orion Apex.jpg

    I've been known to view through the window, although usually an open one as the double glazing doesn't do much for the image quality lol. I only use the Orion Mak outside and with the Vixen Porta alt-az and an Orion 6x30 RACI. The Orion's Synta-made little Dob mount is now used for the Omegon Mighty Mak. I just took the dovetail assembly off the dodgy Omegon Dob mount and put it on the Synta Dob. By turning the Omegon Mak 'upside down' I can mount it on the right of the Synta mount and the finder shoe is in its natural one o'clock position.

    The Omegon was a bit of a disappointment really. I originally bought it to use with a small garden table. My plan was that I could then take rapid advantage of any decent weather with a grab'n'go type set up. The tabletop Dob would enable looking at or near the zenith easier and the f/11 MightyMak would be faster than most 90mm Mak's for some of the brighter DSO's. Unfortunately my garden bench is a bit wobbly and the small portable round table I bought exploded as I was trying to assemble it. I was expecting more durability for fifty quid lol. I eventually gave it my neighbour. She's fixed it and thinks it's a great drinks table, so at least somebody's got some use out of it. I got way too excited about the Mars opposition last year and reasoned that I could set up my 130mm Sky-Watcher Explorer. In 2015 I'd really persevered with practising setting up the Explorer on its EQ2 and 3kg counterweight all with my left arm. Although it could be done, I could only really view the plane of the ecliptic with any comfort.

    Bazooka New Rings (1).jpg

    This, of course, was perfect for a low Mars and I started leaving the mount in the garden covered with a tarpaulin and just carrying the OTA out when I observed. My right arm had made progress from total paralysis to enough movement to cradle the OTA as I placed it into the rings. As you can see (above) the RA slo mo is in a convenient position for me to operate with my left hand. The EQ mount itself is low enough from SE through transit to SW for me to operate easily. I discovered rotating the OTA in the rings was possible for me now as well as either my body or my right arm could steady the OTA. Target acquisition in the ecliptic using the clutches wasn't so bad either, although the RACI definitely helped.

    july6.jpg

    Getting slightly back on topic. On July 6th 2015 I spent hours trying to set the Explorer up with one arm. I did it and was going to take it down as it was just a disability practice session. It was a beautiful and hot summer's day. I decided to leave it out to acclimatise and wait for Venus and Jupiter to start to set in the twilight. I had to stand to observe, but I was rewarded with a crescent Venus and I saw Jupiter's GRS! I could quite plainly see Venusian cloud detail at 150x with an 18mm AH orthoscopic combined with a 3x TeleVue Barlow. I've often seen Venusian cloud detail and the GRS before, but the icing on the cake was seeing Io slowly occulted.

    io.jpg
     
    Last edited: Feb 10, 2017
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  15. Zigarro

    Zigarro Well-Known Member

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    At about $63 I should think it would be! I appreciate how you augment your posts with pix, thanks.
     
  16. Mak the Night

    Mak the Night Well-Known Member

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    Yeah, the picture on Amazon looked OK.
    explodotable.jpg

    I've learnt my lesson anyway. A picture can say so much more sometimes. This picture says: 'crappy exploding piece of rubbish' to me now. ROTFL
     
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  17. Zigarro

    Zigarro Well-Known Member

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    Ah, this is why I haunt "antique" (second-hand) shops! Try B4 you buy! Well, gotta go have my cigar early today- I'll be up at 4am, heading to my dark site to hunt 45P! Good day sir!
     
  18. Mak the Night

    Mak the Night Well-Known Member

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    Yeah, you're right, caveat emptor lol. Good luck and Diwrnod da to you too sir!
     
  19. Zigarro

    Zigarro Well-Known Member

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    Ho- I'm not quite a-bed yet- Spent a relaxing hour with a fine hand-rolled & a glass of bourbon and now I'm having a meal of grilled mahi-mahi (why do they feel the need to say it twice?) and oriental rice. BTW, I went out this afternoon to try to view the sun through my little 90 & a film-filter; NO detail, just an orange disk. I found it hard to achieve focus. I'll try again since I'm certain this scope + a 32mm GSO should yield a decent view? Mebbe I need a cardboard sun-shield?
     
    Last edited: Feb 10, 2017
  20. Mak the Night

    Mak the Night Well-Known Member

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    Well, it's Saturday here now. I don't know about mahi-mahi but you're making me think of cod and chips lol. I don't know anything about solar observing, but there's a lot of specialist equipment to have a butcher's hook at.

    https://www.firstlightoptics.com/solar-filters.html

    https://www.telescopehouse.com/solar-observing/solar-accessories.html
     

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