RECON observing guide for 76867_00YM5_20250718194406

Occultation event with (76867) 00YM5, event index number 1148
Regions able to see the event: Australia

Geocentric closest approach at 2025/07/18 19:44:06 UTC

J2000 position of star is 02:35:44.8 +09:31:48
Equinox of date position of star is 02:37:07.0 +09:38:25
Star is 10 degrees from the moon. Moon is 41% illuminated.
Stellar brightness G=16.4, apparent brightess of occulting body is G=16.1
Use an exposure time of 0.85 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 43% with SNR of 1.3 for the occulted depth (per occulted point)

Apparent velocity is 18.5 km/sec on the sky relative to the star, or, 17.7 arcsec/hr.
The recommended exposure time corresponds to 15.8 km per image.
The 1-sigma error in the time of the event is 1.6 seconds.
The 1-sigma cross-track error in the shadow position is 32.2 km.
The sky-plane scale is 3767.3 km/arcsec.

Diameter estimates:
48.3 km assuming a 5% albedo, aximum of 2.6 sec for a central chord
19.7 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 48.3 km used for deployment plan.

Star training set for 76867_00YM5, (2025/07/18 19:44UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.4 +16:33:31  0.8 30.05  34
Menkar         03:03:37.1 +04:11:18  2.5  8.54  18
PPM 145637     02:30:57.4 +09:40:43  6.5  1.52   9
PPM 145710     02:35:35.1 +09:05:59  7.8  0.66  10
PPM 145759     02:38:47.6 +09:40:16  9.0  0.41  10
PPM 145724     02:36:20.4 +09:57:22 10.2  0.37   9
76867_00YM5    02:37:07.0 +09:38:25 16.1        10
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 76867_00YM5, (2025/07/18 19:44UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 30.05  34
Menkar         03:02:16.8 +04:05:21  2.5  8.54  18
PPM 145637     02:29:35.3 +09:33:57  6.5  1.52   9
PPM 145710     02:34:13.2 +08:59:19  7.8  0.66  10
PPM 145759     02:37:25.4 +09:33:41  9.0  0.41  10
PPM 145724     02:34:58.1 +09:50:44 10.2  0.37   9
76867_00YM5    02:35:44.8 +09:31:48 16.1        10
Positions are for J2000


Created by recondetail.pro, 2025/02/28 11:21:07 MT