Occultation event with (19020) 00SC6, event index number 1421
Regions able to see the event: SAfrica
Geocentric closest approach at 2025/10/26 20:32:57 UTC
J2000 position of star is 03:32:39.1 +03:36:55
Equinox of date position of star is 03:34:00.2 +03:42:04
Star is 136 degrees from the moon. Moon is 24% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=15.4
Use an exposure time of 0.90 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 30% with SNR of 0.9 for the occulted depth (per occulted point)
Apparent velocity is 15.9 km/sec on the sky relative to the star, or, 18.8 arcsec/hr.
Position angle of asteroid motion is 78.1 degrees
The recommended exposure time corresponds to 14.3 km per image.
The 1-sigma error in the time of the event is 1.6 seconds.
The 1-sigma cross-track error in the shadow position is 31.9 km.
The sky-plane scale is 3044.1 km/arcsec.
Diameter estimates:
47.0 km assuming a 5% albedo, aximum of 3.0 sec for a central chord
19.2 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 42.6 km used for deployment plan.
Star training set for 19020_00SC6, (2025/10/26 20:33UT) Object RA Dec mag sep mel Aldebaran 04:37:24.3 +16:33:33 0.8 20.19 156 Menkar 03:03:37.9 +04:11:22 2.5 7.59 130 12 Tau 03:41:12.0 +03:08:21 6.1 1.88 137 PPM 146647 03:33:33.4 +03:57:43 8.3 0.28 136 PPM 146657 03:34:11.2 +03:31:52 11.5 0.18 135 19020_00SC6 03:34:00.2 +03:42:04 15.4 136 Positions are for equinox of date
Star training set for 19020_00SC6, (2025/10/26 20:33UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 20.19 156 Menkar 03:02:16.8 +04:05:21 2.5 7.59 130 12 Tau 03:39:51.1 +03:03:25 6.1 1.88 137 PPM 146647 03:32:12.1 +03:52:33 8.3 0.28 136 PPM 146657 03:32:50.1 +03:26:43 11.5 0.18 135 19020_00SC6 03:32:39.1 +03:36:55 15.4 136 Positions are for J2000