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'Oumuamua
'Oumuamua has a rotation period of 8.1 hours,
similar to Kuiper Belt objects implying a common origin in the vast depths of interstellar/intergalactic space. RDS [[Mod. note -- I don't think the implication is quite that strong. Oumuamua clearly isn't Rama https://en.wikipedia.org/wiki/Rendezvous_with_Rama (which was said to have a 4 minute rotation period), but it's hardly implausible that some bodies originating in different places might have roughly similar rotation periods. -- jt]] |
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'Oumuamua
On 27/11/2017 06:44, Richard D. Saam wrote:
'Oumuamua has a rotation period of 8.1 hours, similar to Kuiper Belt objects implying a common origin in the vast depths of interstellar/intergalactic space. RDS [[Mod. note -- I don't think the implication is quite that strong. Oumuamua clearly isn't Rama https://en.wikipedia.org/wiki/Rendezvous_with_Rama (which was said to have a 4 minute rotation period), but it's hardly implausible that some bodies originating in different places might have roughly similar rotation periods. -- jt]] One thing that puzzled me about it was that the light curve was entirely attributed to a highly elongated shape uniform albedo. What prevents it from being a more rounded shape but with a large variation in albedo? (except possibly that maintaining white ice requires precipitation) Or is an object in space for so long likely to pick up surface muck and rubbish that is inevitably pretty uniform over the entire surface. I presume they have done time resolved spectroscopy on it and not detected anything other than the same sort of surface material? -- Regards, Martin Brown |
#3
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'Oumuamua
On 11/27/17 12:44 AM, Richard D. Saam wrote:
'Oumuamua has a rotation period of 8.1 hours, similar to Kuiper Belt objects implying a common origin in the vast depths of interstellar/intergalactic space. RDS [[Mod. note -- I don't think the implication is quite that strong. Oumuamua clearly isn't Rama https://en.wikipedia.org/wiki/Rendezvous_with_Rama (which was said to have a 4 minute rotation period), but it's hardly implausible that some bodies originating in different places might have roughly similar rotation periods. -- jt]] Arthur C. Clarke visions always had an aspect of truth. His((with Stanley Kubrick) computer human conflict in 2001: A Space Odyssey is surely applicable to today. Arthur may have liked the analogy to Rama in the Hawaiian name 'Oumuamua -"reflecting the way this object is like a scout or messenger sent from the distant past to reach out to us" Apparently several of these interstellar objects travel within the orbit of the Earth several times per year, thus providing possible opportunities for study. In the mean time it interesting to note that the ~8 hour time period has been observed from separate perspectives: 1. Kuiper Belt object rotations 2. Asteroid rotations (not as good a correlation due to collisions possibly modifying their original 8 hr periods) 3. Lisa Pathfinder accelerometer oscillations (1/8 hrs) (A Machian oscillating universe) 4. Gravity Probe B anomalous gyro oscillations (1/8 hrs) 5. Solar oscillations (1/8 hrs) 6. Distant stellar oscillation observed by the Planck space craft This data all point to a possible inherent property of interstellar/intergalactic space. Such a coherent space property (nu~1/8 hrs) would necessarily define an extremely low temperature(T). T = h*nu/k ~ 10^-16 K What are the implications for 'dark matter' and 'dark energy'? RDS |
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'Oumuamua
On Monday, November 27, 2017 at 1:44:32 AM UTC-5, Richard D. Saam wrote:
'Oumuamua has a rotation period of 8.1 hours, similar to Kuiper Belt objects implying a common origin in the vast depths of interstellar/intergalactic space. RDS =20 [[Mod. note -- I don't think the implication is quite that strong. Oumuamua clearly isn't Rama https://en.wikipedia.org/wiki/Rendezvous_with_Rama (which was said to have a 4 minute rotation period), but it's hardly implausible that some bodies originating in different places might have roughly similar rotation periods. -- jt]] Not many natural occurring events produce a cigar shape. If someone wanted to snoop around our solar system to see what the odd RF emissions are about then Oumuamua trajectory would about right to accomplish this. A 4 minute rotation would be a nice scan rate for broad band RF sensors. They could be here to ask how to decode the meaning of life from the Chuck Barrie song we sent. I would not want to be the one that answers that question. |
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