Occultation event with (4754) Panthoos, event index number 1640
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/12/05 02:10:29 UTC
J2000 position of star is 03:22:39.5 +03:26:59
Equinox of date position of star is 03:24:00.8 +03:32:27
Star is 32 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=15.1
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 8.2 per integration for unocculted signal
Expected flux drop is 50% with SNR of 4.1 for the occulted depth (per occulted point)
Apparent velocity is 14.8 km/sec on the sky relative to the star, or, 16.8 arcsec/hr.
Position angle of asteroid motion is 83.9 degrees
The recommended exposure time corresponds to 12.6 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 34.9 km.
The sky-plane scale is 3168.7 km/arcsec.
Diameter estimates:
57.8 km assuming a 5% albedo, aximum of 3.9 sec for a central chord
23.6 km assuming a 30% albedo, maximum of 1.6 sec for a central chord
Cross-track diameter of 53.0 km used for deployment plan.
Star training set for 4754_Panthoos, (2025/12/05 02:10UT) Object RA Dec mag sep mel Aldebaran 04:37:24.7 +16:33:33 0.8 22.23 12 Menkar 03:03:38.3 +04:11:24 2.5 5.12 35 97Kap2Cet 03:22:28.4 +03:46:02 6.2 0.45 32 PPM 146487 03:22:37.5 +03:33:08 9.2 0.35 32 PPM 146505 03:23:44.6 +03:32:18 10.2 0.07 32 4754_Panthoos 03:24:00.8 +03:32:27 15.1 32 Positions are for equinox of date
Star training set for 4754_Panthoos, (2025/12/05 02:10UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 22.23 12 Menkar 03:02:16.8 +04:05:21 2.5 5.12 35 97Kap2Cet 03:21:06.9 +03:40:31 6.2 0.45 32 PPM 146487 03:21:16.2 +03:27:37 9.2 0.35 32 PPM 146505 03:22:23.3 +03:26:50 10.2 0.07 32 4754_Panthoos 03:22:39.5 +03:26:59 15.1 32 Positions are for J2000