2025-06-02, 06:21 PM
CNEOS predicts that the newly discovered NEO, 2025 LB, will make a close approach on 2025-Jun-04 07:07±00:03 UT at a distance of 0.00102 AU, moving with V Relative=11.21 km/sec, H=26.7 magnitude, diameter 12 m - 27 m and 'Rarity'=1. As of 2025 Jun 2, there is a 1 day observation arc, the Condition Code=7 and the Earth MOID=0.000791639 AU. The solution date was 2025-Jun-02 08:12:02 PDT. The initial reported observation was by Pan-STARRS 1, Haleakala on 2025-06-01. This NEO is too small to make MPC's list of Potentially Hazardous Asteroids (PHAs). CNEOS lists its last close approach as occurring in June 1933 at a nominal distance of 0.00560 AU.
Using MPC's elements for the epoch 2025 May 5 0000 UT (downloaded on 2025 Jun 2), ST4.1.1.15 Visual Pro predicts that this NEO's close approach will occur (to the nearest hour) on 2025 Jun 4 0300 EDT (0700 UT) with the NEO 156.1k km distant traveling through Lynx at 14.2"/second and 16.7 magnitude. Peak brightness is predicted on 2025 Jun 3 2300 EDT (Jun 4 0300 UT) with the NEO 233.8k km distant, traveling through Canes Venatici at 408"/minute and 15.8 magnitude. This object is so new that it wasn't added to MPC's file of NEOs at Today's Epoch that ST4 can download from the MPC website. I had to download the orbital elements for a single object. That always provides the standard epoch for the elements (currently 2025 May 5 0000 UT).
Here's the Object Info dialog for 2025 LB:
Since this object will pass very close and it's a recent discovery, observers should follow the directions in the Important Thread at the top of this forum section to download orbital elements close to their time of observation. This NEO will be moving very quickly across the sky at close approach and at 16.7 magnitude will require a large telescope to see it.
Good hunting,
Phil S.
Using MPC's elements for the epoch 2025 May 5 0000 UT (downloaded on 2025 Jun 2), ST4.1.1.15 Visual Pro predicts that this NEO's close approach will occur (to the nearest hour) on 2025 Jun 4 0300 EDT (0700 UT) with the NEO 156.1k km distant traveling through Lynx at 14.2"/second and 16.7 magnitude. Peak brightness is predicted on 2025 Jun 3 2300 EDT (Jun 4 0300 UT) with the NEO 233.8k km distant, traveling through Canes Venatici at 408"/minute and 15.8 magnitude. This object is so new that it wasn't added to MPC's file of NEOs at Today's Epoch that ST4 can download from the MPC website. I had to download the orbital elements for a single object. That always provides the standard epoch for the elements (currently 2025 May 5 0000 UT).
Here's the Object Info dialog for 2025 LB:
Since this object will pass very close and it's a recent discovery, observers should follow the directions in the Important Thread at the top of this forum section to download orbital elements close to their time of observation. This NEO will be moving very quickly across the sky at close approach and at 16.7 magnitude will require a large telescope to see it.
Good hunting,
Phil S.