RECON observing guide for 4501_Eurypylos_20250624213106

Occultation event with (4501) Eurypylos, event index number 1094
Regions able to see the event: SAmericaN

Geocentric closest approach at 2025/06/24 21:31:06 UTC

J2000 position of star is 10:38:34.5 +00:28:51
Equinox of date position of star is 10:39:52.9 +00:20:52
Star is 76 degrees from the moon. Moon is 1% illuminated.
Stellar brightness G=16.3, apparent brightess of occulting body is G=16.4
Use an exposure time of 0.80 seconds with the standard RECON-QHY system.
SNR of 3.0 per integration for unocculted signal
Expected flux drop is 50% with SNR of 1.5 for the occulted depth (per occulted point)

Apparent velocity is 24.1 km/sec on the sky relative to the star, or, 21.4 arcsec/hr.
The recommended exposure time corresponds to 19.3 km per image.
The 1-sigma error in the time of the event is 2.3 seconds.
The 1-sigma cross-track error in the shadow position is 25.8 km.
The sky-plane scale is 4051.7 km/arcsec.

Diameter estimates:
47.2 km assuming a 5% albedo, aximum of 2.0 sec for a central chord
19.3 km assuming a 30% albedo, maximum of 0.8 sec for a central chord
Cross-track diameter of 47.2 km used for deployment plan.

Star training set for 4501_Eurypylos, (2025/06/24 21:31UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.6 +11:50:30  1.3 13.72  64
33 Sex         10:42:42.0 -01:52:34  6.3  2.33  77
PPM 178248     10:41:19.6 -00:16:50  8.4  0.72  76
PPM 157073     10:42:06.2 +00:22:35  9.2  0.56  76
PPM 157026     10:39:30.1 +00:26:09 10.4  0.13  76
4501_Eurypylos 10:39:52.9 +00:20:52 16.4        76
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 4501_Eurypylos, (2025/06/24 21:31UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 13.72  64
33 Sex         10:41:24.0 -01:44:33  6.3  2.33  77
PPM 178248     10:40:01.3 -00:08:49  8.4  0.72  76
PPM 157073     10:40:47.7 +00:30:36  9.2  0.56  76
PPM 157026     10:38:11.6 +00:34:08 10.4  0.13  76
4501_Eurypylos 10:38:34.5 +00:28:51 16.4        76
Positions are for J2000


Created by recondetail.pro, 2025/03/15 10:09:05 MT