RECON observing guide for 1870_Glaukos_20261110210400

Occultation event with (1870) Glaukos, event index number 4638
Regions able to see the event: Europe

Geocentric closest approach at 2026/11/10 21:04:00 UTC

J2000 position of star is 04:32:10.3 +14:22:48
Equinox of date position of star is 04:33:41.4 +14:26:08
Star is 167 degrees from the moon. Moon is 3% illuminated.
Stellar brightness G=12.9, apparent brightess of occulting body is G=15.6
Use an exposure time of 0.12 seconds with the standard RECON-QHY system.
SNR of 11.6 per integration for unocculted signal
Expected flux drop is 92% with SNR of 10.7 for the occulted depth (per occulted point)

Apparent velocity is 15.7 km/sec on the sky relative to the star, or, 17.8 arcsec/hr.
Position angle of asteroid motion is 75.0 degrees
The recommended exposure time corresponds to 1.9 km per image.
The 1-sigma error in the time of the event is 0.7 seconds.
The 1-sigma cross-track error in the shadow position is 27.6 km.
The sky-plane scale is 3174.6 km/arcsec.

Diameter estimates:
45.5 km assuming a 5% albedo, maximum of 2.9 sec for a central chord
18.6 km assuming a 30% albedo, maximum of 1.2 sec for a central chord
Cross-track diameter of 47.6 km used for deployment plan.

Star training set for 1870_Glaukos, (2026/11/10 21:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:27.9 +16:33:40  0.8  2.31 169
Bellatrix      05:26:34.4 +06:22:18  1.6 15.29 154
86Rho Tau      04:35:22.6 +14:53:55  4.6  0.62 168
PPM 119977     04:32:42.3 +14:44:45  8.5  0.39 168
PPM 119989     04:33:18.9 +14:12:37 10.4  0.24 167
1870_Glaukos   04:33:41.4 +14:26:08 15.6       167
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 1870_Glaukos, (2026/11/10 21:04UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.4 +16:30:29  0.8  2.31 169
Bellatrix      05:25:07.8 +06:20:58  1.6 15.29 154
86Rho Tau      04:33:51.1 +14:50:39  4.6  0.62 168
PPM 119977     04:31:11.0 +14:41:23  8.5  0.39 168
PPM 119989     04:31:47.9 +14:09:16 10.4  0.24 167
1870_Glaukos   04:32:10.3 +14:22:48 15.6       167
Positions are for J2000


Created by recondetail.pro, 2025/06/20 22:13:20 MT