Occultation event with (4754) Panthoos, event index number 1662
Regions able to see the event: Europe
Geocentric closest approach at 2025/12/09 22:10:00 UTC
J2000 position of star is 03:20:34.9 +03:24:27
Equinox of date position of star is 03:21:56.2 +03:29:58
Star is 96 degrees from the moon. Moon is 70% illuminated.
Stellar brightness G=15.5, apparent brightess of occulting body is G=15.2
Use an exposure time of 0.95 seconds with the standard RECON-QHY system.
SNR of 6.3 per integration for unocculted signal
Expected flux drop is 42% with SNR of 2.7 for the occulted depth (per occulted point)
Apparent velocity is 13.7 km/sec on the sky relative to the star, or, 15.4 arcsec/hr.
Position angle of asteroid motion is 87.0 degrees
The recommended exposure time corresponds to 13.0 km per image.
The 1-sigma error in the time of the event is 0.7 seconds.
The 1-sigma cross-track error in the shadow position is 35.5 km.
The sky-plane scale is 3193.6 km/arcsec.
Diameter estimates:
57.8 km assuming a 5% albedo, aximum of 4.2 sec for a central chord
23.6 km assuming a 30% albedo, maximum of 1.7 sec for a central chord
Cross-track diameter of 53.0 km used for deployment plan.
Star training set for 4754_Panthoos, (2025/12/09 22:10UT) Object RA Dec mag sep mel Aldebaran 04:37:24.7 +16:33:33 0.8 22.67 75 Menkar 03:03:38.3 +04:11:24 2.5 4.62 101 97Kap2Cet 03:22:28.4 +03:46:02 6.2 0.30 96 PPM 146478 03:22:17.3 +03:22:29 8.4 0.15 96 4754_Panthoos 03:21:56.2 +03:29:58 15.2 96 Positions are for equinox of date
Star training set for 4754_Panthoos, (2025/12/09 22:10UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 22.67 75 Menkar 03:02:16.8 +04:05:21 2.5 4.62 101 97Kap2Cet 03:21:06.9 +03:40:31 6.2 0.30 96 PPM 146478 03:20:56.0 +03:16:57 8.4 0.15 96 4754_Panthoos 03:20:34.9 +03:24:27 15.2 96 Positions are for J2000