RECON observing guide for 2146_Stentor_20260129163935

Occultation event with (2146) Stentor, event index number 3186
Regions able to see the event: Australia

Geocentric closest approach at 2026/01/29 16:39:35 UTC

J2000 position of star is 12:23:31.1 +28:29:18
Equinox of date position of star is 12:24:49.3 +28:20:38
Star is 85 degrees from the moon. Moon is 86% illuminated.
Stellar brightness G=15.1, apparent brightess of occulting body is G=15.5
Use an exposure time of 0.65 seconds with the standard RECON-QHY system.
SNR of 7.4 per integration for unocculted signal
Expected flux drop is 60% with SNR of 4.4 for the occulted depth (per occulted point)

Apparent velocity is 19.2 km/sec on the sky relative to the star, or, 19.9 arcsec/hr.
Position angle of asteroid motion is 171.4 degrees
The recommended exposure time corresponds to 12.5 km per image.
The 1-sigma error in the time of the event is 1.7 seconds.
The 1-sigma cross-track error in the shadow position is 6.1 km.
The sky-plane scale is 3469.4 km/arcsec.

Diameter estimates:
59.4 km assuming a 5% albedo, maximum of 3.1 sec for a central chord
24.3 km assuming a 30% albedo, maximum of 1.3 sec for a central chord
Cross-track diameter of 50.8 km used for deployment plan.

Star training set for 2146_Stentor, (2026/01/29 16:40UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:51.2 +19:02:53  0.0 27.20 111
Denebola       11:50:23.3 +14:25:34  2.1 16.05  84
15Gam Com      12:28:14.1 +28:07:25  4.4  0.78  85
PPM 101814     12:21:09.1 +28:19:11  6.6  0.81  84
PPM 101867     12:25:30.7 +28:15:43 10.7  0.17  85
2146_Stentor   12:24:49.3 +28:20:38 15.5        85
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 2146_Stentor, (2026/01/29 16:40UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:37.7 +19:10:06  0.0 27.20 111
Denebola       11:49:02.7 +14:34:16  2.1 16.05  84
15Gam Com      12:26:56.1 +28:16:04  4.4  0.78  85
PPM 101814     12:19:50.6 +28:27:51  6.6  0.81  84
PPM 101867     12:24:12.6 +28:24:23 10.7  0.17  85
2146_Stentor   12:23:31.1 +28:29:18 15.5        85
Positions are for J2000


Created by recondetail.pro, 2025/06/30 10:29:10 MT