Occultation event with (12052) Aretaon, event index number 3971
Regions able to see the event: Australia
Geocentric closest approach at 2026/08/09 19:53:45 UTC
J2000 position of star is 03:28:11.7 +18:10:00
Equinox of date position of star is 03:29:42.7 +18:15:27
Star is 43 degrees from the moon. Moon is 12% illuminated.
Stellar brightness G=16.6, apparent brightess of occulting body is G=16.4
Use an exposure time of 1.10 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 45% with SNR of 1.4 for the occulted depth (per occulted point)
Apparent velocity is 16.1 km/sec on the sky relative to the star, or, 15.2 arcsec/hr.
Position angle of asteroid motion is 86.2 degrees
The recommended exposure time corresponds to 17.7 km per image.
The 1-sigma error in the time of the event is 0.2 seconds.
The 1-sigma cross-track error in the shadow position is 30.0 km.
The sky-plane scale is 3815.0 km/arcsec.
Diameter estimates:
44.3 km assuming a 5% albedo, maximum of 2.8 sec for a central chord
18.1 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 39.2 km used for deployment plan.
Star training set for 12052_Aretaon, (2026/08/09 19:54UT) Object RA Dec mag sep mel Aldebaran 04:37:27.0 +16:33:38 0.8 16.24 29 44Zet Per 03:55:48.7 +31:57:37 2.8 14.91 35 65 Ari 03:25:58.5 +20:53:45 5.9 2.78 43 PPM 119087 03:28:34.6 +18:50:52 6.6 0.65 43 PPM 119092 03:28:43.7 +18:16:32 9.8 0.23 44 12052_Aretaon 03:29:42.7 +18:15:27 16.4 43 Positions are for equinox of date
Star training set for 12052_Aretaon, (2026/08/09 19:54UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 16.24 29 44Zet Per 03:54:07.9 +31:53:01 2.8 14.91 35 65 Ari 03:24:26.1 +20:48:12 5.9 2.78 43 PPM 119087 03:27:03.3 +18:45:23 6.6 0.65 43 PPM 119092 03:27:12.6 +18:11:03 9.8 0.23 44 12052_Aretaon 03:28:11.7 +18:10:00 16.4 43 Positions are for J2000