Occultation event with (7815) Dolon, event index number 4567
Regions able to see the event: SAmericaN,SAmericaS
Geocentric closest approach at 2026/11/05 07:48:30 UTC
J2000 position of star is 04:11:46.5 -04:18:00
Equinox of date position of star is 04:13:06.6 -04:13:57
Star is 113 degrees from the moon. Moon is 16% illuminated.
Stellar brightness G=16.0, apparent brightess of occulting body is G=15.2
Use an exposure time of 0.65 seconds with the standard RECON-QHY system.
SNR of 3.3 per integration for unocculted signal
Expected flux drop is 32% with SNR of 1.1 for the occulted depth (per occulted point)
Apparent velocity is 15.7 km/sec on the sky relative to the star, or, 18.7 arcsec/hr.
Position angle of asteroid motion is 66.3 degrees
The recommended exposure time corresponds to 10.2 km per image.
The 1-sigma error in the time of the event is 1.2 seconds.
The 1-sigma cross-track error in the shadow position is 25.9 km.
The sky-plane scale is 3016.1 km/arcsec.
Diameter estimates:
52.5 km assuming a 5% albedo, maximum of 3.3 sec for a central chord
21.4 km assuming a 30% albedo, maximum of 1.4 sec for a central chord
Cross-track diameter of 42.5 km used for deployment plan.
Star training set for 7815_Dolon, (2026/11/05 07:49UT) Object RA Dec mag sep mel Rigel 05:15:49.8 -08:10:21 0.1 16.07 97 67Bet Eri 05:09:10.3 -05:03:13 2.8 13.99 99 38Omi1Eri 04:13:10.7 -06:46:10 4.0 2.54 112 PPM 186657 04:13:40.4 -04:20:35 6.9 0.18 112 PPM 186649 04:13:18.7 -04:21:37 9.5 0.14 112 7815_Dolon 04:13:06.6 -04:13:57 15.2 112 Positions are for equinox of date
Star training set for 7815_Dolon, (2026/11/05 07:49UT) Object RA Dec mag sep mel Rigel 05:14:32.3 -08:12:06 0.1 16.07 97 67Bet Eri 05:07:50.8 -05:05:13 2.8 13.99 99 38Omi1Eri 04:11:52.0 -06:50:13 4.0 2.54 112 PPM 186657 04:12:20.3 -04:24:37 6.9 0.18 112 PPM 186649 04:11:58.6 -04:25:40 9.5 0.14 112 7815_Dolon 04:11:46.5 -04:18:00 15.2 113 Positions are for J2000