rdhatt
rdhatt t1_j6kn5i2 wrote
Reply to comment by Fourney in ‘Extraordinary’ footage shows one of the closest known approaches of a near-Earth object — On 26 Jan. 2023, asteroid 2023 BU was about 2,200 miles above the surface of the Earth by marketrent
The title is correct. The asteroid was imaged at ~13,000 miles.
Sources:Website of astronomer cited in Newsweek (warning ads):
JPL:https://www.jpl.nasa.gov/news/nasa-system-predicts-small-asteroid-to-pass-close-by-earth-this-week
>Designated 2023 BU, the asteroid will zoom over the southern tip of South America at about 4:27 p.m. PST (7:27 p.m. EST) only 2,200 miles (3,600 kilometers) above the planet’s surface
edit: ~13,000 miles, not ~22,000. Newsweek is correct, confirmed from first link above
rdhatt t1_j84x9rs wrote
Reply to comment by actfatcat in SpaceX on Twitter: Super Heavy Booster 7 completed a full duration static fire test of 31 Raptor engines, producing 7.9 million lbf of thrust (~3,600 metric tons) – less than half of the booster’s capability by allforspace
~2.5 minutes is the total burn time of the Saturn V first stage engines after liftoff.