Recent content by Charles Bell H47Vicksburg

asteroid 2024 YR4 is calculated to make a close approach to Earth on 2032-Dec-22 11:05 with a relative velocity of 13.43 km/s plus it has large mass. kinetic energy = 1/2 m v^2 kinetic energy is proportional to mass and proportional to the velocity squared both terms give it enormous energy...

JPL provides handy tables of planet parameters https://ssd.jpl.nasa.gov/planets/phys_par.html All the data there is backed up with references which are verified. Lately because of asteroid 2024 YR4 impact hazard, the data on earth radius has become a focus especially on December 22, 2032.

Latest Sentry update of 2025-Feb-17 shows a small increase in cumulative impact probability Sentry: Earth Impact Monitoring Impact Probability (cumulative) 2.6e-2 Alternate Representations for Impact Probability = 2.6e-2 2.6% chance of Earth impact 1 in 38 odds of impact 97.4% chance the...

Today's Daily Orbit update posts new observation by Z23 – Nordic Optical Telescope, La Palma and H01 – Magdalena Ridge Observatory, Socorro. These observations extend the observation arc of 2024 YR4 to 416 total observations over interval: 2024 12 25.304941 – 2025 02 17.207112 Look for new...

The world's largest single-aperture optical telescope is the 10.4m Gran Telescopio Canarias which submitted observations of asteroid 2024 YR on 2024-Jan-13 when the object was near mag 21 in g band. This telescope is on the list of 8-10 m class telescopes in the IAWN observing plans. Its...