2025-03-13, 06:48 PM
CNEOS predicts that the newly discovered NEO, 2025 EF4, will make a close approach on 2025-Mar-15 09:53±00:02 UT at a distance of 0.00307 AU moving with V Relative=5.85 km/sec, H=24.8 magnitude, diameter 29 m - 65 m and 'Rarity'=2. There is currently a 2 day observation arc, the Condition Code=6 and the Earth MOID=0.00199508 AU. The solution date was 2025-Mar-13 05:47:31 PDT. The initial reported observation was by Santel Observatory, El Leoncito on 2025-03-11. This NEO is too small to make MPC's list of Potentially Hazardous Asteroids (PHAs). It made a close approach nearly this close back on 1965-Mar-16 at 0.00584 AU.
Using MPC's orbital elements for the epoch 2025 March 13 0000 UT, ST4.1.11.14 Pro predicts that 2025 EF4 will reach a peak brightness of 13.9 magnitude on 2025 March 15 at 0600 EDT at a distance of 466.5k km traveling through Cancer at ~150"/minute. This is also the close approach (to the nearest hour). This NEO should be visible from March 13-16 in a 13" telescope.
Here's the Object Info dialog for this NEO:
Since this will be a close pass, parallax will affect the predicted positions. For best accuracy observers should download orbital elements close to the time of close approach. See the post near the top of this section for the instructions to download elements for quickly changing orbits.
Good hunting,
Phil S.
Using MPC's orbital elements for the epoch 2025 March 13 0000 UT, ST4.1.11.14 Pro predicts that 2025 EF4 will reach a peak brightness of 13.9 magnitude on 2025 March 15 at 0600 EDT at a distance of 466.5k km traveling through Cancer at ~150"/minute. This is also the close approach (to the nearest hour). This NEO should be visible from March 13-16 in a 13" telescope.
Here's the Object Info dialog for this NEO:
Since this will be a close pass, parallax will affect the predicted positions. For best accuracy observers should download orbital elements close to the time of close approach. See the post near the top of this section for the instructions to download elements for quickly changing orbits.
Good hunting,
Phil S.