A brilliant bolide was captured on video on the afternoon of August 10 th, 1972, as it became a brilliant daytime fireball over the Grand Teton Mountains in Wyoming before skipping back out of the Earth’s atmosphere. This record was already broken once this year, with the passage of asteroid 2020 QG 3,000 kilometers (1,864 miles) from the surface of the Earth on August 16th. This sets a record for the closest documented non-meteoric asteroid pass versus the Earth. The orbit (pre-Earth passage) of asteroid 2020 VT4. Earth juuust missed occupying the same space as the perihelion point for the asteroid, which occurred just 20 hours prior to Earth passage. The asteroid- 2020 VT4 is estimated to be 5-10 meters (16-32 feet) across, about the size of a small house. This encounter shortened its orbit, ensuring that this Earth-crosser will make more frequent close approaches. Newly-discovered asteroid A10sHcN approached Earth yesterday, passing only a few hundred miles above the South Pacific Ocean. This is not uncommon for fast-movers, especially asteroids that are coming at the Earth from our sunward blind-spot, like 2020 VT4. The asteroid was spotted by the Asteroid Terrestrial-impact Last Alert System ( ATLAS) survey at the Mauna Loa Observatory in Hawaii in the early morning hours of Saturday, November 14th, just 15 hours after approach. A low-flying space rock set a record last Friday (appropriately, the 13 th), when 2020 VT4 passed just under 400 kilometers (250 miles) over the Southern Pacific. AstroGrav is ideal for astronomers, astrophysicists, researchers, teachers, educationalists, and students, and comes complete with a tutorial and full documentation.Wow. Any situation in which gravity is the only significant force can be simulated, and the illustrative sample files that are included with AstroGrav include many examples such as exoplanet systems, protoplanets that evolve into planetary systems, rubble piles and their interactions with massive bodies, complex star systems, and even projectiles and bouncing balls. Several different celestial coordinate grids and a wide range of physical units are available, and editing facilities allow you to create new objects manually, or import from hundreds of thousands of asteroids and comets.īecause it calculates the motions of bodies from their gravitational interactions, AstroGrav is not restricted to just the solar system. Constellations and over 100,000 background stars are included, with comprehensive data for every star. The AstroGrav software has a huge range of features and viewing options, including views from space or any object, planetarium-style views from any location on Earth, multiple views animated simultaneously, dynamically calculated orbits and trajectories, comprehensive tabular data, and simulation time steps from a fraction of a second to thousands of years. The effects of general relativity and radiation pressure can be taken into account, and superb interactive 3D viewing allows you to easily rotate and zoom your view while the solar system evolves. AstroGrav is a full-featured, high precision solar system simulator that calculates the gravitational interactions between all astronomical bodies, so that the motions of asteroids and comets are simulated much more accurately than with planetarium applications.
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