Occultation event with (4754) Panthoos, event index number 1276
Regions able to see the event: Australia
Geocentric closest approach at 2025/09/10 19:34:43 UTC
J2000 position of star is 03:50:28.7 +07:02:12
Equinox of date position of star is 03:51:51.3 +07:06:47
Star is 32 degrees from the moon. Moon is 88% illuminated.
Stellar brightness G=16.1, apparent brightess of occulting body is G=15.6
Use an exposure time of 1.95 seconds with the standard RECON-QHY system.
SNR of 6.0 per integration for unocculted signal
Expected flux drop is 37% with SNR of 2.2 for the occulted depth (per occulted point)
Apparent velocity is 6.7 km/sec on the sky relative to the star, or, 6.9 arcsec/hr.
Position angle of asteroid motion is 152.0 degrees
The recommended exposure time corresponds to 13.0 km per image.
The 1-sigma error in the time of the event is 4.2 seconds.
The 1-sigma cross-track error in the shadow position is 22.6 km.
The sky-plane scale is 3494.8 km/arcsec.
Diameter estimates:
57.8 km assuming a 5% albedo, aximum of 8.7 sec for a central chord
23.6 km assuming a 30% albedo, maximum of 3.5 sec for a central chord
Cross-track diameter of 53.0 km used for deployment plan.
Star training set for 4754_Panthoos, (2025/09/10 19:35UT) Object RA Dec mag sep mel Aldebaran 04:37:23.9 +16:33:32 0.8 14.60 41 Menkar 03:03:37.5 +04:11:20 2.5 12.35 22 31 Tau 03:53:22.6 +06:36:37 5.7 0.63 32 PPM 146955 03:51:31.4 +06:41:49 8.4 0.42 32 PPM 146969 03:52:17.3 +07:14:23 9.4 0.17 32 PPM 146961 03:51:56.5 +07:11:02 10.1 0.07 32 4754_Panthoos 03:51:51.3 +07:06:47 15.6 32 Positions are for equinox of date
Star training set for 4754_Panthoos, (2025/09/10 19:35UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 14.60 41 Menkar 03:02:16.8 +04:05:21 2.5 12.35 22 31 Tau 03:52:00.2 +06:32:05 5.7 0.63 32 PPM 146955 03:50:09.0 +06:37:14 8.4 0.42 32 PPM 146969 03:50:54.6 +07:09:50 9.4 0.17 32 PPM 146961 03:50:33.8 +07:06:28 10.1 0.07 32 4754_Panthoos 03:50:28.7 +07:02:12 15.6 32 Positions are for J2000