Occultation event with (5476) Mulius, event index number 1675
Regions able to see the event: SAmericaN
Geocentric closest approach at 2025/12/13 07:47:46 UTC
J2000 position of star is 03:27:13.8 +08:11:19
Equinox of date position of star is 03:28:37.6 +08:16:39
Star is 135 degrees from the moon. Moon is 36% illuminated.
Stellar brightness G=16.2, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.70 seconds with the standard RECON-QHY system.
SNR of 3.1 per integration for unocculted signal
Expected flux drop is 42% with SNR of 1.3 for the occulted depth (per occulted point)
Apparent velocity is 13.8 km/sec on the sky relative to the star, or, 15.4 arcsec/hr.
Position angle of asteroid motion is 76.2 degrees
The recommended exposure time corresponds to 9.6 km per image.
The 1-sigma error in the time of the event is 0.6 seconds.
The 1-sigma cross-track error in the shadow position is 26.1 km.
The sky-plane scale is 3215.9 km/arcsec.
Diameter estimates:
42.7 km assuming a 5% albedo, aximum of 3.1 sec for a central chord
17.4 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 35.1 km used for deployment plan.
Star training set for 5476_Mulius, (2025/12/13 07:48UT) Object RA Dec mag sep mel Aldebaran 04:37:24.8 +16:33:34 0.8 18.71 118 Menkar 03:03:38.4 +04:11:24 2.5 7.43 141 1Omi Tau 03:26:12.8 +09:07:06 3.6 1.03 135 PPM 146581 03:29:01.2 +07:50:21 7.9 0.45 135 PPM 146549 03:27:25.1 +08:21:34 9.5 0.31 135 PPM 146574 03:28:46.4 +08:05:45 10.9 0.19 135 5476_Mulius 03:28:37.6 +08:16:39 15.9 135 Positions are for equinox of date
Star training set for 5476_Mulius, (2025/12/13 07:48UT) Object RA Dec mag sep mel Aldebaran 04:35:55.4 +16:30:29 0.8 18.71 118 Menkar 03:02:16.8 +04:05:21 2.5 7.43 141 1Omi Tau 03:24:48.7 +09:01:42 3.6 1.03 135 PPM 146581 03:27:37.7 +07:45:01 7.9 0.45 135 PPM 146549 03:26:01.4 +08:16:12 9.5 0.31 135 PPM 146574 03:27:22.8 +08:00:25 10.9 0.19 135 5476_Mulius 03:27:13.8 +08:11:19 15.9 135 Positions are for J2000