RECON observing guide for 4791_Iphidamas_20250724170238

Occultation event with (4791) Iphidamas, event index number 1167
Regions able to see the event: Australia

Geocentric closest approach at 2025/07/24 17:02:38 UTC

J2000 position of star is 01:43:02.7 +34:45:04
Equinox of date position of star is 01:44:31.7 +34:52:44
Star is 83 degrees from the moon. Moon is 0% illuminated.
Stellar brightness G=12.7, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 13.3 per integration for unocculted signal
Expected flux drop is 93% with SNR of 12.4 for the occulted depth (per occulted point)

Apparent velocity is 16.6 km/sec on the sky relative to the star, or, 16.6 arcsec/hr.
The recommended exposure time corresponds to 2.0 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 31.5 km.
The sky-plane scale is 3595.6 km/arcsec.

Diameter estimates:
59.2 km assuming a 5% albedo, aximum of 3.6 sec for a central chord
24.1 km assuming a 30% albedo, maximum of 1.5 sec for a central chord
Cross-track diameter of 59.2 km used for deployment plan.

Star training set for 4791_Iphidamas, (2025/07/24 17:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.4 +16:33:31  0.8 42.60  52
57Gam1And      02:05:28.8 +42:27:04  2.3  8.60  76
PPM 066538     01:43:32.7 +35:22:25  5.6  0.53  83
PPM 066512     01:41:54.7 +34:28:02  8.3  0.68  84
PPM 066533     01:43:11.2 +34:50:20  9.5  0.28  83
PPM 066542     01:43:37.7 +34:53:51 10.4  0.19  83
4791_Iphidamas 01:44:31.7 +34:52:44 15.5        83
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 4791_Iphidamas, (2025/07/24 17:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 42.60  52
57Gam1And      02:03:54.1 +42:19:46  2.3  8.60  76
PPM 066538     01:42:03.6 +35:14:44  5.6  0.53  83
PPM 066512     01:40:26.1 +34:20:19  8.3  0.68  84
PPM 066533     01:41:42.4 +34:42:39  9.5  0.28  83
PPM 066542     01:42:08.8 +34:46:10 10.4  0.19  83
4791_Iphidamas 01:43:02.7 +34:45:04 15.5        83
Positions are for J2000


Created by recondetail.pro, 2025/03/01 08:54:17 MT