Occultation event with (4754) Panthoos, event index number 1283
Regions able to see the event: Europe
Geocentric closest approach at 2025/09/15 01:13:01 UTC
J2000 position of star is 03:50:43.9 +06:51:36
Equinox of date position of star is 03:52:06.5 +06:56:10
Star is 38 degrees from the moon. Moon is 43% illuminated.
Stellar brightness G=15.0, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.95 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 62% with SNR of 6.0 for the occulted depth (per occulted point)
Apparent velocity is 6.3 km/sec on the sky relative to the star, or, 6.6 arcsec/hr.
Position angle of asteroid motion is 169.1 degrees
The recommended exposure time corresponds to 6.0 km per image.
The 1-sigma error in the time of the event is 5.4 seconds.
The 1-sigma cross-track error in the shadow position is 13.6 km.
The sky-plane scale is 3452.3 km/arcsec.
Diameter estimates:
57.8 km assuming a 5% albedo, aximum of 9.2 sec for a central chord
23.6 km assuming a 30% albedo, maximum of 3.7 sec for a central chord
Cross-track diameter of 53.0 km used for deployment plan.
Star training set for 4754_Panthoos, (2025/09/15 01:13UT) Object RA Dec mag sep mel Aldebaran 04:37:23.9 +16:33:32 0.8 14.67 23 Menkar 03:03:37.6 +04:11:20 2.5 12.37 49 31 Tau 03:53:22.6 +06:36:37 5.7 0.45 38 PPM 146955 03:51:31.4 +06:41:49 8.4 0.28 38 PPM 146974 03:52:34.1 +07:05:54 10.3 0.20 38 4754_Panthoos 03:52:06.5 +06:56:10 15.5 37 Positions are for equinox of date
Star training set for 4754_Panthoos, (2025/09/15 01:13UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 14.67 23 Menkar 03:02:16.8 +04:05:21 2.5 12.37 49 31 Tau 03:52:00.2 +06:32:05 5.7 0.45 38 PPM 146955 03:50:09.0 +06:37:14 8.4 0.28 38 PPM 146974 03:51:11.4 +07:01:21 10.3 0.20 38 4754_Panthoos 03:50:43.9 +06:51:36 15.5 38 Positions are for J2000