RECON observing guide for 1867_Deiphobus_20250710102130

Occultation event with (1867) Deiphobus, event index number 1200
Regions able to see the event: SMexico

Geocentric closest approach at 2025/07/10 10:21:30 UTC

J2000 position of star is 02:58:25.0 +39:28:56
Equinox of date position of star is 03:00:03.3 +39:34:59
Star is 129 degrees from the moon. Moon is 100% illuminated.
Stellar brightness G=8.6, apparent brightess of occulting body is G=14.1
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 86.3 per integration for unocculted signal
Expected flux drop is 99% with SNR of 85.8 for the occulted depth (per occulted point)

Apparent velocity is 29.6 km/sec on the sky relative to the star, or, 25.7 arcsec/hr.
The recommended exposure time corresponds to 3.5 km per image.
The 1-sigma error in the time of the event is 1.1 seconds.
The 1-sigma cross-track error in the shadow position is 17.7 km.
The sky-plane scale is 4141.3 km/arcsec.

Diameter estimates:
130.0 km assuming a 5% albedo, aximum of 4.4 sec for a central chord
53.1 km assuming a 30% albedo, maximum of 1.8 sec for a central chord
Cross-track diameter of 130.0 km used for deployment plan.

Star training set for 1867_Deiphobus, (2025/07/10 10:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:23.3 +16:33:31  0.8 31.27 145
Algol          03:09:50.4 +41:03:08  2.1  2.37 131
22Pi Per       03:00:24.2 +39:45:47  4.7  0.19 129
PPM 067942     02:58:42.2 +39:09:59  8.5  0.49 129
PPM 067963     03:00:03.4 +39:34:59  8.7  0.00 129
1867_Deiphobus 03:00:03.3 +39:34:59 14.1       129
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 1867_Deiphobus, (2025/07/10 10:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8 31.27 145
Algol          03:08:10.1 +40:57:20  2.1  2.37 131
22Pi Per       02:58:45.7 +39:39:45  4.7  0.19 129
PPM 067942     02:57:04.3 +39:03:54  8.5  0.49 129
PPM 067963     02:58:25.0 +39:28:56  8.7  0.00 129
1867_Deiphobus 02:58:25.0 +39:28:56 14.1       129
Positions are for J2000


Created by recondetail.pro, 2025/03/13 09:42:29 MT