RECON observing guide for 8125_Tyndareus_20250617191935

Occultation event with (8125) Tyndareus, event index number 1068
Regions able to see the event: SAfrica

Geocentric closest approach at 2025/06/17 19:19:35 UTC

J2000 position of star is 10:54:18.0 -00:36:07
Equinox of date position of star is 10:55:36.2 -00:44:17
Star is 172 degrees from the moon. Moon is 61% illuminated.
Stellar brightness G=12.1, apparent brightess of occulting body is G=16.7
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 19.8 per integration for unocculted signal
Expected flux drop is 99% with SNR of 19.5 for the occulted depth (per occulted point)

Apparent velocity is 17.7 km/sec on the sky relative to the star, or, 15.9 arcsec/hr.
The recommended exposure time corresponds to 2.1 km per image.
The 1-sigma error in the time of the event is 3.0 seconds.
The 1-sigma cross-track error in the shadow position is 42.2 km.
The sky-plane scale is 4014.1 km/arcsec.

Diameter estimates:
40.7 km assuming a 5% albedo, aximum of 2.3 sec for a central chord
16.6 km assuming a 30% albedo, maximum of 0.9 sec for a central chord
Cross-track diameter of 40.7 km used for deployment plan.

Star training set for 8125_Tyndareus, (2025/06/17 19:20UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:43.5 +11:50:30  1.3 16.97 166
55 Leo         10:57:00.9 +00:36:02  6.2  1.38 174
PPM 178316     10:53:54.3 -00:20:15  7.4  0.58 172
PPM 178326     10:55:55.4 -01:03:39  9.7  0.33 172
PPM 178327     10:56:06.2 -00:43:33 10.1  0.13 172
8125_Tyndareus 10:55:36.2 -00:44:17 16.7       172
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 8125_Tyndareus, (2025/06/17 19:20UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 16.97 166
55 Leo         10:55:42.5 +00:44:13  6.2  1.38 174
PPM 178316     10:52:36.1 -00:12:07  7.4  0.58 172
PPM 178326     10:54:37.3 -00:55:29  9.7  0.33 172
PPM 178327     10:54:48.0 -00:35:23 10.1  0.13 172
8125_Tyndareus 10:54:18.0 -00:36:07 16.7       172
Positions are for J2000


Created by recondetail.pro, 2025/03/15 09:42:26 MT