The astroid’s name is 481394 2006 SF6 and is set for its closest approach to the Earth on November 21. The 650 metre celestial chunk is classified as an Apollo asteroid, the most dangerous class of asteroid, having an Earth-crossing orbit! Asteroid news: November close approach of massive space ...www.express.co.uk / news /science/1193359/ asteroid - news ...The astroid's name is 481394 2006 SF6 and is set for its closest approach to the Earth on November 21 . The 650 metre celestial chunk is classified as an Apollo asteroid , the most dangerous class of...!! There is also the chance that it could be nudged much closer by the Yarkovsky effect.
The Yarkovsky effect is where the soft force of sunlight can steer asteroids into Earth-crossing orbits and drastically alter the layout of their paths across solar system.
Asteroids larger than approximately 35 meters across can pose a threat to a town or city, so 481394 2006 SF6, with it’s 650 metre diameter could pose a serious threat to major populated areas of the Earth.
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The Torino Scale, adopted by the IAU in 1999, is a tool for categorising potential Earth impact events.
While you're here, how about this:
"The Gargantua Hypothesis" --Habitable Planets May Be Orbiting Black Holes | The Daily
A bigger problem says Schnittman “is that if the accretion rate were lower, the density of the disc would also be lower, making it more difficult to radiate! Videos for Asteroid News : November Close Approach 2:13 Asteroid alert: NASA tracks three rocks flying past Earth - One was found four days ago express.co.uk!! And without this radiation, the accretion disc would just heat up beyond the temperature of liquid water! 2:36 NASA asteroid WARNING Two giant asteroids headed on 'Earth Close Approach ' YouTube!! So there is a paradox at the heart of this argument that ultimately invalidates it.”
Schnittman calculates that a planet orbiting just beyond the gravitational radius would experience enough heating from the cosmic microwave background to do the trick. "This would be like orbiting a white dwarf at a distance of 0.2 AU," providing enough energy for liquid water, but would also bathe the planet in dangerous levels of ultraviolet.
Then there is the light from o the density of stars at galaxy centers where the night sky of the alien black hole planet would be 100,000 times brighter than on Earth, providing a significant background of UV light and x-rays. Schnittman imagines, reports Technology Review that a civilization that is sufficiently advanced to construct a sort of "reverse Dyson sphere" that reflects this energy. "This would allow habitability much closer to the host supermassive black hole, even in the face of overwhelming background UV or x-ray radiation."
Astronomers Detect a 'Hot Jupiter' With a Staggering 18-Hour-Short Orbit
We have a new record. Perhaps 1,060 light-years away, a gas giant called NGTS-10b is whipping around its star so closely, it completes an entire orbit in just 18.4 hours.
That's nearly as close as the planet can get to the host star without being ripped apart by gravitational forces! 2:13 Asteroid alert: A NASA-tracked rock will come as close as the Moon tonight - Will it hit? express.co.uk!! But it will get closer.
Astronomers have estimated that the exoplanet is spiralling in towards the star, and will cross that ripping-apart point - called the Roche limit - in just 38 million years! 2:13 Asteroid alert: A NASA-tracked rock is about to fly past Earth at 19,800MPH - Will it hit? express.co.uk!! It's utterly doomed.
The finding makes this solar system an incredible laboratory for studying tidal interactions between a star and a perilously close giant exoplanet. A paper describing the exoplanet - which belongs to the 'hot Jupiter' type - has been published on pre-print resource arXiv .
Hot Jupiters are fascinating exoplanets. As the name suggests, they are gas giants like Jupiter; unlike Jupiter, however, they orbit very closely to their host stars, with orbital periods of less than 10 days. This is what makes them "hot" (and here you were thinking it was the swimsuits).
The Nobel Prize in physics has gone to the discovery of an exoplanet orbiting a star - MIT
The history: In 1995, Mayor and Queloz identified a planet orbiting the sun-like star 51 Pegasi, over 50 light-years away in the constellation Pegasus. The pair used a spectroscope to detect tiny wobbles in the light emitted by the host star. These changes turned out to be induced by the gravitational effects of a large, hot, gaseous exoplanet orbiting the star 4.3 million miles away. That exoplanet, later named 51 Pegasi b, was confirmed a week later by another team using the Lick Observatory in California.
Although the first exoplanet detection was made in 1992 (with the discovery of a pair of planets orbiting a pulsar 2,300 light-years away), 51 Pegasi b was the first exoplanet to be found orbiting a sun-like star.
This may worth something:
Decommissioned Earth science satellite to remain in orbit for centuries - SpaceNews.com
LAS CRUCES, N.M. — A U.S.-European satellite that completed its mission earlier this month has been decommissioned but will remain in orbit for as long as 1,000 years, far beyond existing orbital debris mitigation guidelines.
Jason-2, a joint mission of NASA, the National Oceanic and Atmospheric Administration, the French space agency CNES and European weather agency Eumetsat, ended its mission to study sea-level height Oct. 1. The spacecraft, also known as Ocean Surface Topography Mission (OSTM), launched in June 2008 for a mission originally expected to last three years.
The decision to shut down Jason-2 came after telemetry indicated the spacecraft's power system was deteriorating. Earlier problems with Jason-2 in 2017 forced controllers to move the spacecraft into a slightly lower orbit and delete its excess propellant reserves to avoid any interference with its successor, Jason-3, launched in 2016.
Scientists puzzled by giant planet orbiting a dwarf star, defying understanding of planet
Scientists are expressing surprise after discovering a solar system 30 light-years away from Earth that defies current understanding about planet formation, with a large Jupiter-like planet orbiting a diminutive star known as a red dwarf.
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But in this case, the star and the planet are not much different in size, the researchers said on Thursday.
The star, called GJ 3512, is about 12 per cent the size of our sun, while the planet that orbits it has a mass of at least about half of Jupiter, our solar system's largest planet.
"Yes, an absolute surprise," said astrophysicist Juan Carlos Morales of the Institute of Space Studies of Catalonia at the Institute of Space Sciences in Spain, who led the research published in the journal Science.
"The discovery was surprising because theoretical formation models suggest that low-mass stars typically host small planets, similar to Earth or small Neptunes."
In 2010, a Japanese mission called Hayabusa returned home with rock from asteroid Itokawa. Now, analysis of those g… https://t.co/boOmtcwbyU AstronomyMag (from Our tiny corner of the cosmos) Sat Oct 19 23:00:46 +0000 2019
The near-Earth asteroid Bennu has ejected surprising flurries of material from its surface on some dozen occasions… https://t.co/FZuuiIDxjR AstronomyMag (from Our tiny corner of the cosmos) Sun Oct 20 22:30:13 +0000 2019
Our planet may have been last pummeled by asteroid impacts longer ago than previously thought, explaining why life… https://t.co/bEAHHMy7id AstronomyMag (from Our tiny corner of the cosmos) Sat Oct 19 18:00:50 +0000 2019
Asteroid horror: NASA panic as space rock half size of Ben Nevis on dangerous Earth-orbit https://t.co/QLMTtIxhXv https://t.co/Rh3Pb1jW3T Daily_Express (from London) Sun Oct 20 23:53:34 +0000 2019
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