RECON observing guide for 4543_Phoinix_20250722003616

Occultation event with (4543) Phoinix, event index number 1155
Regions able to see the event: SAmericaS

Geocentric closest approach at 2025/07/22 00:36:16 UTC

J2000 position of star is 11:31:52.1 -06:30:14
Equinox of date position of star is 11:33:10.2 -06:38:42
Star is 94 degrees from the moon. Moon is 10% illuminated.
Stellar brightness G=13.0, apparent brightess of occulting body is G=15.8
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 11.2 per integration for unocculted signal
Expected flux drop is 93% with SNR of 10.4 for the occulted depth (per occulted point)

Apparent velocity is 28.1 km/sec on the sky relative to the star, or, 23.4 arcsec/hr.
The recommended exposure time corresponds to 3.4 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 37.9 km.
The sky-plane scale is 4318.1 km/arcsec.

Diameter estimates:
66.7 km assuming a 5% albedo, aximum of 2.4 sec for a central chord
27.2 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 66.7 km used for deployment plan.

Star training set for 4543_Phoinix, (2025/07/22 00:36UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.8 +11:50:29  1.3 27.79  67
4Gam Crv       12:17:07.4 -17:41:01  2.6 15.39 108
PPM 194572     11:34:05.6 -07:58:08  5.8  1.34  95
PPM 194554     11:33:14.7 -06:36:45  6.9  0.04  94
4543_Phoinix   11:33:10.2 -06:38:42 15.8        94
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 4543_Phoinix, (2025/07/22 00:36UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 27.79  67
4Gam Crv       12:15:48.1 -17:32:30  2.6 15.39 108
PPM 194572     11:32:47.5 -07:49:39  5.8  1.34  95
PPM 194554     11:31:56.6 -06:28:16  6.9  0.04  94
4543_Phoinix   11:31:52.1 -06:30:14 15.8        94
Positions are for J2000


Created by recondetail.pro, 2025/03/15 10:36:50 MT