Occultation event with (5264) Telephus, event index number 927
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/04/23 23:42:30 UTC
J2000 position of star is 09:20:54.4 +31:58:13
Equinox of date position of star is 09:22:25.7 +31:51:42
Star is 149 degrees from the moon. Moon is 20% illuminated.
Stellar brightness G=14.2, apparent brightess of occulting body is G=14.6
Use an exposure time of 0.40 seconds with the standard RECON-QHY system.
SNR of 10.0 per integration for unocculted signal
Expected flux drop is 59% with SNR of 5.9 for the occulted depth (per occulted point)
Apparent velocity is 6.8 km/sec on the sky relative to the star, or, 7.7 arcsec/hr.
The recommended exposure time corresponds to 2.7 km per image.
The 1-sigma error in the time of the event is 6.0 seconds.
The 1-sigma cross-track error in the shadow position is 25.4 km.
The sky-plane scale is 3205.3 km/arcsec.
Diameter estimates:
76.2 km assuming a 5% albedo, aximum of 11.2 sec for a central chord
31.1 km assuming a 30% albedo, maximum of 4.6 sec for a central chord
Cross-track diameter of 76.2 km used for deployment plan.
Star training set for 5264_Telephus, (2025/04/23 23:42UT) Object RA Dec mag sep mel Pollux 07:46:51.7 +27:57:47 1.1 21.03 132 40Alp Lyn 09:22:35.4 +34:17:02 3.1 2.42 147 PPM 074436 09:23:10.7 +32:09:18 7.1 0.33 149 PPM 074442 09:23:45.4 +31:47:21 9.4 0.29 149 5264_Telephus 09:22:25.7 +31:51:42 14.6 149 Positions are for equinox of date
Star training set for 5264_Telephus, (2025/04/23 23:42UT) Object RA Dec mag sep mel Pollux 07:45:17.8 +28:01:33 1.1 21.03 132 40Alp Lyn 09:21:02.9 +34:23:34 3.1 2.42 147 PPM 074436 09:21:39.3 +32:15:50 7.1 0.33 149 PPM 074442 09:22:14.2 +31:53:54 9.4 0.29 149 5264_Telephus 09:20:54.4 +31:58:13 14.6 149 Positions are for J2000