RECON observing guide for 5119_Imbrius_20250618091218

Occultation event with (5119) Imbrius, event index number 1071
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/06/18 09:12:18 UTC

J2000 position of star is 02:42:05.2 +30:11:38
Equinox of date position of star is 02:43:36.4 +30:18:05
Star is 57 degrees from the moon. Moon is 55% illuminated.
Stellar brightness G=13.7, apparent brightess of occulting body is G=15.9
Use an exposure time of 0.20 seconds with the standard RECON-QHY system.
SNR of 9.6 per integration for unocculted signal
Expected flux drop is 88% with SNR of 8.5 for the occulted depth (per occulted point)

Apparent velocity is 36.4 km/sec on the sky relative to the star, or, 32.1 arcsec/hr.
The recommended exposure time corresponds to 7.3 km per image.
The 1-sigma error in the time of the event is 1.4 seconds.
The 1-sigma cross-track error in the shadow position is 30.2 km.
The sky-plane scale is 4080.1 km/arcsec.

Diameter estimates:
51.8 km assuming a 5% albedo, aximum of 1.4 sec for a central chord
21.1 km assuming a 30% albedo, maximum of 0.6 sec for a central chord
Cross-track diameter of 51.8 km used for deployment plan.

Star training set for 5119_Imbrius, (2025/06/18 09:12UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.1 +16:33:30  0.8 29.37  78
Hamal          02:08:36.9 +23:34:54  2.0 10.29  47
39 Ari         02:49:26.0 +29:21:04  5.6  1.58  57
PPM 067638     02:43:32.6 +31:02:35  7.9  0.74  57
PPM 067640     02:43:34.6 +30:14:01 10.9  0.07  57
5119_Imbrius   02:43:36.4 +30:18:05 15.9        57
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Star training set for 5119_Imbrius, (2025/06/18 09:12UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 29.37  78
Hamal          02:07:10.8 +23:27:41  2.0 10.29  47
39 Ari         02:47:54.9 +29:14:46  5.6  1.58  57
PPM 067638     02:42:00.9 +30:56:08  7.9  0.74  57
PPM 067640     02:42:03.4 +30:07:34 10.9  0.07  57
5119_Imbrius   02:42:05.2 +30:11:38 15.9        57
Positions are for J2000


Created by recondetail.pro, 2025/02/28 09:38:17 MT