Occultation event with (4754) Panthoos, event index number 1677
Regions able to see the event: Australia
Geocentric closest approach at 2025/12/13 11:25:54 UTC
J2000 position of star is 03:19:10.2 +03:23:49
Equinox of date position of star is 03:20:31.6 +03:29:24
Star is 138 degrees from the moon. Moon is 35% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.2
Use an exposure time of 1.00 seconds with the standard RECON-QHY system.
SNR of 3.7 per integration for unocculted signal
Expected flux drop is 29% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 12.8 km/sec on the sky relative to the star, or, 14.3 arcsec/hr.
Position angle of asteroid motion is 89.6 degrees
The recommended exposure time corresponds to 12.8 km per image.
The 1-sigma error in the time of the event is 0.6 seconds.
The 1-sigma cross-track error in the shadow position is 35.8 km.
The sky-plane scale is 3214.7 km/arcsec.
Diameter estimates:
57.8 km assuming a 5% albedo, aximum of 4.5 sec for a central chord
23.6 km assuming a 30% albedo, maximum of 1.8 sec for a central chord
Cross-track diameter of 53.0 km used for deployment plan.
Star training set for 4754_Panthoos, (2025/12/13 11:26UT) Object RA Dec mag sep mel Aldebaran 04:37:24.8 +16:33:34 0.8 22.96 120 Menkar 03:03:38.4 +04:11:24 2.5 4.27 143 97Kap2Cet 03:22:28.4 +03:46:03 6.2 0.56 138 PPM 146423 03:19:06.9 +03:46:28 8.3 0.45 139 PPM 146430 03:19:34.4 +03:45:51 9.0 0.36 139 PPM 146446 03:20:26.6 +03:42:05 10.8 0.21 138 4754_Panthoos 03:20:31.6 +03:29:24 15.2 138 Positions are for equinox of date
Star training set for 4754_Panthoos, (2025/12/13 11:26UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 22.96 120 Menkar 03:02:16.8 +04:05:21 2.5 4.27 143 97Kap2Cet 03:21:06.9 +03:40:31 6.2 0.56 138 PPM 146423 03:17:45.4 +03:40:51 8.3 0.45 139 PPM 146430 03:18:12.9 +03:40:14 9.0 0.36 139 PPM 146446 03:19:05.1 +03:36:31 10.8 0.21 138 4754_Panthoos 03:19:10.2 +03:23:49 15.2 138 Positions are for J2000