Occultation event with (1749) Telamon, event index number 1006
Regions able to see the event: Australia
Geocentric closest approach at 2025/05/27 12:57:13 UTC
J2000 position of star is 09:46:36.5 +13:56:11
Equinox of date position of star is 09:47:59.2 +13:49:05
Star is 72 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=14.3, apparent brightess of occulting body is G=14.9
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 9.8 per integration for unocculted signal
Expected flux drop is 64% with SNR of 6.3 for the occulted depth (per occulted point)
Apparent velocity is 19.7 km/sec on the sky relative to the star, or, 19.8 arcsec/hr.
Position angle of asteroid motion is 332.6 degrees
The recommended exposure time corresponds to 7.9 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 22.1 km.
The sky-plane scale is 3575.8 km/arcsec.
Diameter estimates:
76.2 km assuming a 5% albedo, aximum of 3.9 sec for a central chord
31.1 km assuming a 30% albedo, maximum of 1.6 sec for a central chord
Cross-track diameter of 76.2 km used for deployment plan.
Star training set for 1749_Telamon, (2025/05/27 12:57UT) Object RA Dec mag sep mel Regulus 10:09:43.3 +11:50:31 1.3 5.65 78 16Psi Leo 09:45:06.7 +13:54:15 5.3 0.70 71 PPM 126802 09:49:13.4 +13:21:32 8.0 0.55 72 PPM 126785 09:48:29.3 +13:52:20 9.4 0.13 72 1749_Telamon 09:47:59.2 +13:49:05 14.9 72 Positions are for equinox of date
Star training set for 1749_Telamon, (2025/05/27 12:57UT) Object RA Dec mag sep mel Regulus 10:08:21.9 +11:58:02 1.3 5.65 78 16Psi Leo 09:43:43.9 +14:01:18 5.3 0.70 71 PPM 126802 09:47:50.9 +13:28:40 8.0 0.55 72 PPM 126785 09:47:06.6 +13:59:27 9.4 0.13 72 1749_Telamon 09:46:36.5 +13:56:11 14.9 72 Positions are for J2000