On Feb 28, 11:38 am, Robert Clark <rgregorycl...@yahoo.com> wrote: > On Feb 27, 1:33 pm, j...@specsol.spam.sux.com wrote: > > > > > > > > > > > In sci.physics Robert Clark <rgregorycl...@yahoo.com> wrote: > > > > That video I linked to previously and ones like it may also be able > > > to address this question: > > > > An Asteroid's Parting Shot. > > > By Phil Plait > > > Posted Tuesday, Feb. 19, 2013, at 8:00 AM > > >http://www.slate.com/blogs/bad_astronomy/2013/02/19/near_earth_astero... > > > > The video shows 2012 DA14 slowing moving through the frame, and > > > meteors and artificial satellites streaking rapidly through the frame. > > > Assuming we are able to distinguish the satellites, perhaps by > > > knowing already their positions, perhaps we can determine if the > > > number of meteors shown here are higher than normal. > > > Better would be longer exposures that include at least the time > > > period of the Russian meteor impact. > > > > Bob Clark > > > While people here have been speculating all sorts of nonsense, astronomers > > from the University of Antioquia in Medellin, Colombia have figured out > > where the Russian meteor came from and that it has no relationship to > > the other close passing asteroid. > > >http://www.space.com/19974-russian-meteor-explosion-origin-size.html > > The Fireballs of February. > Feb. 22, 2012 > ... > "They all hail from the asteroid belt?but not from a single location > in the asteroid belt," he says. "There is no common source for these > fireballs, which is puzzling." > "This isn't the first time sky watchers have noticed odd fireballs in > February. In fact, the "Fireballs of February" are a bit of a legend > in meteor circles. > "Brown explains: "Back in the 1960s and 70s, amateur astronomers > noticed an increase in the number of bright, sound-producing deep- > penetrating fireballs during the month of February. The numbers seemed > significant, especially when you consider that there are few people > outside at night in winter. Follow-up studies in the late 1980s > suggested no big increase in the rate of February fireballs. > Nevertheless, we've always wondered if something was going on." > "Indeed, a 1990 study by astronomer Ian Holliday suggests that the > 'February Fireballs' are real. He analyzed photographic records of > about a thousand fireballs from the 1970s and 80s and found evidence > for a fireball stream intersecting Earth's orbit in February. He also > found signs of fireball streams in late summer and fall. The results > are controversial, however. Even Halliday recognized some big > statistical uncertainties in his results." > ...http://science.nasa.gov/science-news/science-at-nasa/2012/22feb_febru... > > Note this was from last year, not this year in regard to this > February's unusual meteor and asteroid encounters. But what's key is > the article notes this has been noticed in other February's. > The article suggests greater number of fireballs in February. It also > mentions they are typically slow, long-lasting, and penetrate deep in > the atmosphere. I don't know about the slow part, but the long-lasting > and deep penetration aspects could be due to larger meteors during > February's. > If there is an association with the 2012 DA14 asteroid, then since > it has approximately a year long orbit, this could explain why the > fireballs are seen frequently in February. Note it was discovered > last year in February also during a close approach. > Also notable as Steve Willner mentioned the two orbital crossings > could result in rather close approaches on the second crossing as > well: > > On Feb 26, 1:56 pm, will...@cfa.harvard.edu (Steve Willner) wrote: > > > > > > > > > > > ... > > > > Does this mean there are two close approaches per orbit? It doesn't > > > necessarily have to be since where the two orbits "cross" does not > > > mean the two bodies have to be there at the same time. > > > Yes, exactly. Typically one body will be far away when the other is > > near a crossing point. > > > > if they are close at one "crossing" point, they should be > > > relatively close at the other. > > > About half a day away at the next crossing point, given the period of > > 366.24 days. That's about 400 Earth radii if I've done the > > arithmetic right. The distance is cumulative, so a simple estimate > > is that it will take another 366 years (365 orbits for the asteroid) > > before there's another close approach. However, the recent Earth > > encounter must have changed the orbit, so the simple estimate is > > probably wrong. There are also likely to be non-gravitational > > effects. This object is probably not one to worry about in the near > > term, but this sort of rough estimate is no substitute for a proper > > orbit calculation. > > This could explain the observation of Halliday that there seems to be > a statistical increase also in late Summer and Fall. > > In any case, the Air Force needs to release its satellite detections > of these fireballs. For one thing they might be able to detect the > meteors before they have any appreciable interaction with the > atmosphere. For large meteors, of oblong shape, the atmospheric > interaction could alter their direction, thus giving a misleading > interpretation of their original orbits. > > For many people the Air Force not sharing all the technical means at > its disposal led to the loss of the shuttle Columbia crew. It must not > be said that its keeping its meteor detections capability secret led > to the loss of an entire city. > > Bob Clark
Since when do mainstream oligarchs care about the rest of us?