How fast does 4 Vesta move?
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How fast does 4 Vesta move?
This is just for fun and a VERY rough estimate. My observations may be off. My math may be off. I am not taking into account the locations of earth and vesta. That said, for several nights the first week of this month I tried to an eye on Vesta. I tried to estimate its speed and came up with something around 37.5 arcseconds per hour. Have any of you tried estimating the speed of an asteroid? Does this see like a reasonable number?
Rob
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Re: How fast does 4 Vesta move?
i wounder if astrometrica can measure this
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Re: How fast does 4 Vesta move?
Checking (4) Vesta on TheSky 6 software, shows its current motion as 34.5 arc-sec/hour.
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Re: How fast does 4 Vesta move?
Thank you. I did better than I hoped for. That amount of error could be caused by imprecise charting. Five nights wasn't that many for such a small object moving so slowly.
Rob
Telescopes: 50mm refractor, ED80 triplet, 90mm makcass, 10" dob, 8"SCT, 11"SCT
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Re: How fast does 4 Vesta move?
If you took images of Vesta, you could platesolve the images, and figure out the
AR
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Re: How fast does 4 Vesta move?
That's one of the things I like about astronomy. It seems like you never run out of new things to learn. This year was the first time I've paid much attention to asteroids. I started with Ceres. I found it and plotted it. Then I went for Vesta. I found it, plotted it, and attempted to figure out how fast it was moving. I didn't use any tools other than a star chart. I tried to come as close to plotting Vesta's location as I could each night. I only used a camera with a 50mm lens on a tripod, so that kept me from coming too close. I then took a simple ruler and enlarged the star chart until 10cm = 1 degree. I used the ruler to measure about how far Vesta had traveled and divided it out. It was very unscientific. The next time I try that I'll have more tools at my disposal. I think if I had used a telescope, or even a longer lens, I might have been able to come a little closer. I have to say it was fun.
Rob
Telescopes: 50mm refractor, ED80 triplet, 90mm makcass, 10" dob, 8"SCT, 11"SCT
Mounts: Celestron CGX, Orion Sirius + several camera tripods
Cameras: Canon 6D, Canon 80D, ZWO-ASI120MC
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Telescopes: 50mm refractor, ED80 triplet, 90mm makcass, 10" dob, 8"SCT, 11"SCT
Mounts: Celestron CGX, Orion Sirius + several camera tripods
Cameras: Canon 6D, Canon 80D, ZWO-ASI120MC
Binoculars: 10x50, 12x60, 15x70, 25-125x80
Observatory: SkyShed POD XL3 + 8x12 warm room
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Re: How fast does 4 Vesta move?
Hi Rob,
I would say, considering the tools at hand, you hit the nail on the head on Vesta's speed across the apparent sky! I enjoyed reading about your procedure. It sounds like the kinds of things I do sometimes.
I would say, considering the tools at hand, you hit the nail on the head on Vesta's speed across the apparent sky! I enjoyed reading about your procedure. It sounds like the kinds of things I do sometimes.
Bill Steen
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Many eyepieces, just not really expensive ones.
Many small scopes, plus a Lightbridge 12, LX 70-8R,6R,6M
Many eyepieces, just not really expensive ones.
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Re: How fast does 4 Vesta move?
That's an amazingly accurate result, considering that the scale of 1mm on a ruler equals 3.6 arcseconds. If you want to learn the mathematics of astrometric measurements, then check out this web page:
http://spiff.rit.edu/classes/phys373/le ... strom.html
It's well written and easy to follow the mathematics behind the 7 step process to get an astrometric solution. It uses the asteroid 1107 Lictoria as an example.
Thanks for posting your results ....
http://spiff.rit.edu/classes/phys373/le ... strom.html
It's well written and easy to follow the mathematics behind the 7 step process to get an astrometric solution. It uses the asteroid 1107 Lictoria as an example.
Thanks for posting your results ....
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Re: How fast does 4 Vesta move?
Hi Rob. It appears that your efforts were extremely close to the "official" movements of 4 Vesta. I really enjoyed your interesting report, and it shows what a dedicated amateur astronomer can do. Thanks for posting this thread Rob, as there are quite a few minor planet enthusiasts among the members on here.
Marshall
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Sky-Watcher 90mm f/13.8 Maksutov-Cassegrain on motorized Multimount
Orion Astroview 120ST f/5 Refractor on EQ3 mount
Celestron Comet Catcher 140mm f/3.64 Schmidt-Newtonian on alt-az mount
Celestron Omni XLT150R f/5 Refractor on CG4 mount with dual axis drives.
Orion 180mm f/15 Maksutov-Cassegrain on CG5-GT Goto mount.
Orion XT12i 12" f/4.9 Dobsonian Intelliscope.
Kamakura 7x35 Binoculars and Celestron SkyMaster 15x70 Binoculars. ZWO ASI 120MC camera.
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Re: How fast does 4 Vesta move?
Stellarium shows a movement of 0.189° over 24 hours starting at about the time of this post. That's 28.4 arc seconds per hour.
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- alexwolf
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Re: How fast does 4 Vesta move?
You may just select Solar system body to get the hourly motion info
With best wishes, Alexander
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Re: How fast does 4 Vesta move?
@alexwolf
Thank you for your input, Alexander. I use custom info options and it has been a long time since I made inventory of everything that's available there. I'll check it out now.
Stellarium is the best and we are all truly grateful for the work you put into it!
Thank you for your input, Alexander. I use custom info options and it has been a long time since I made inventory of everything that's available there. I'll check it out now.
Stellarium is the best and we are all truly grateful for the work you put into it!
7x50 Helios Apollo ✶ 8x42 Bresser Everest ✶ 73mm f/5.9 WO APO ✶ 4" f/5 TeleVue Genesis ✶ 6" f/10 Celestron 6SE ✶ 0.63x reducer ✶ 1.8, 2, 2.5 and 3x Barlows ✶ eyepieces from 4.5 to 34mm
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