Occultation event with (1749) Telamon, event index number 1019
Regions able to see the event: Australia
Geocentric closest approach at 2025/05/30 10:25:47 UTC
J2000 position of star is 09:48:05.0 +13:46:31
Equinox of date position of star is 09:49:27.6 +13:39:23
Star is 30 degrees from the moon. Moon is 15% illuminated.
Stellar brightness G=16.8, apparent brightess of occulting body is G=14.9
Use an exposure time of 1.80 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 15% with SNR of 0.5 for the occulted depth (per occulted point)
Apparent velocity is 20.9 km/sec on the sky relative to the star, or, 20.8 arcsec/hr.
Position angle of asteroid motion is 332.5 degrees
The recommended exposure time corresponds to 37.6 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 22.4 km.
The sky-plane scale is 3608.6 km/arcsec.
Diameter estimates:
76.2 km assuming a 5% albedo, aximum of 3.6 sec for a central chord
31.1 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 76.2 km used for deployment plan.
Star training set for 1749_Telamon, (2025/05/30 10:26UT) Object RA Dec mag sep mel Regulus 10:09:43.4 +11:50:31 1.3 5.26 36 16Psi Leo 09:45:06.8 +13:54:15 5.3 1.08 29 PPM 126819 09:50:19.3 +13:37:11 8.1 0.21 31 PPM 126796 09:48:58.2 +13:44:19 10.9 0.14 30 1749_Telamon 09:49:27.6 +13:39:23 14.9 31 Positions are for equinox of date
Star training set for 1749_Telamon, (2025/05/30 10:26UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 5.26 36 16Psi Leo 09:43:43.9 +14:01:18 5.3 1.08 29 PPM 126819 09:48:56.7 +13:44:20 8.1 0.21 31 PPM 126796 09:47:35.5 +13:51:27 10.9 0.14 30 1749_Telamon 09:48:05.0 +13:46:31 14.9 30 Positions are for J2000