RECON observing guide for 4007_Euryalos_20250606185950

Occultation event with (4007) Euryalos, event index number 1035
Regions able to see the event: SAfrica

Geocentric closest approach at 2025/06/06 18:59:50 UTC

J2000 position of star is 10:30:03.6 +13:41:01
Equinox of date position of star is 10:31:24.9 +13:33:10
Star is 53 degrees from the moon. Moon is 82% illuminated.
Stellar brightness G=12.9, apparent brightess of occulting body is G=16.0
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 12.1 per integration for unocculted signal
Expected flux drop is 95% with SNR of 11.5 for the occulted depth (per occulted point)

Apparent velocity is 19.2 km/sec on the sky relative to the star, or, 18.2 arcsec/hr.
The recommended exposure time corresponds to 2.3 km per image.
The 1-sigma error in the time of the event is 2.6 seconds.
The 1-sigma cross-track error in the shadow position is 42.9 km.
The sky-plane scale is 3793.2 km/arcsec.

Diameter estimates:
51.3 km assuming a 5% albedo, aximum of 2.7 sec for a central chord
20.9 km assuming a 30% albedo, maximum of 1.1 sec for a central chord
Cross-track diameter of 51.3 km used for deployment plan.

Star training set for 4007_Euryalos, (2025/06/06 19:00UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.4 +11:50:31  1.3  5.56  57
46 Leo         10:33:33.1 +14:00:21  5.5  0.69  52
PPM 127438     10:30:03.7 +13:09:30  7.6  0.51  53
PPM 127459     10:31:09.5 +14:00:47  9.1  0.46  53
PPM 127456     10:31:07.3 +13:17:43 11.2  0.27  53
4007_Euryalos  10:31:24.9 +13:33:10 16.0        52
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 4007_Euryalos, (2025/06/06 19:00UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3  5.56  57
46 Leo         10:32:11.7 +14:08:15  5.5  0.69  52
PPM 127438     10:28:42.4 +13:17:20  7.6  0.51  53
PPM 127459     10:29:48.0 +14:08:39  9.1  0.46  53
PPM 127456     10:29:46.0 +13:25:34 11.2  0.27  53
4007_Euryalos  10:30:03.6 +13:41:01 16.0        53
Positions are for J2000


Created by recondetail.pro, 2025/03/15 09:23:21 MT