RECON observing guide for 38050_Bias_20250524213429

Occultation event with (38050) Bias, event index number 999
Regions able to see the event: Senegal

Geocentric closest approach at 2025/05/24 21:34:29 UTC

J2000 position of star is 08:29:58.1 -09:07:10
Equinox of date position of star is 08:31:11.9 -09:12:20
Star is 100 degrees from the moon. Moon is 7% illuminated.
Stellar brightness G=14.7, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.60 seconds with the standard RECON-QHY system.
SNR of 9.6 per integration for unocculted signal
Expected flux drop is 69% with SNR of 6.6 for the occulted depth (per occulted point)

Apparent velocity is 26.1 km/sec on the sky relative to the star, or, 24.4 arcsec/hr.
The recommended exposure time corresponds to 15.7 km per image.
The 1-sigma error in the time of the event is 1.5 seconds.
The 1-sigma cross-track error in the shadow position is 17.2 km.
The sky-plane scale is 3849.1 km/arcsec.

Diameter estimates:
63.4 km assuming a 5% albedo, aximum of 2.4 sec for a central chord
25.9 km assuming a 30% albedo, maximum of 1.0 sec for a central chord
Cross-track diameter of 63.4 km used for deployment plan.

Star training set for 38050_Bias, (2025/05/24 21:34UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:46:16.0 -16:45:09 -1.5 26.62  78
Alphard        09:28:50.1 -08:46:12  2.0 14.24 114
PPM 191380     08:29:33.7 -08:54:08  6.5  0.51 100
PPM 191396     08:30:29.5 -09:14:35  9.2  0.18 100
38050_Bias     08:31:11.9 -09:12:20 15.5       101
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 38050_Bias, (2025/05/24 21:34UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:07.9 -16:43:28 -1.5 26.62  78
Alphard        09:27:35.2 -08:39:30  2.0 14.24 114
PPM 191380     08:28:19.8 -08:49:00  6.5  0.51 100
PPM 191396     08:29:15.7 -09:09:25  9.2  0.18 100
38050_Bias     08:29:58.1 -09:07:10 15.5       100
Positions are for J2000


Created by recondetail.pro, 2025/03/15 08:48:03 MT