RECON: TNO occultation with 523601

Event between (523601) 03UY413 and star GA1200:00338219 with event index number of 2626854

Geocentric closest approach at 2024/09/29 23:21:07 UTC

J2000 position of star is 02:03:42.0 +31:54:27
Equinox of date position of star is 02:05:06.0 +32:01:18
Stellar brightness G=14.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 115 degrees from the moon. Moon is 7% illuminated.
Apparent brightness V=21.8

Object is 42.8 AU from the Sun and 42.0 AU from the Earth.
Apparent velocity is 21.4 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 86 seconds.
The 1-sigma cross-track error in the shadow position is 1661 km.

The object has an absolute magnitude Hv=5.4
Diameter=483.1 km assuming a 5% albedo -- 23.5 sec chord
Diameter=197.2 km assuming a 30% albedo -- 9.6 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 
 
 

Star training set for 523601, (2024/09/29 23:22UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:20.6 +16:33:26  0.8 37.71  87
Hamal          02:08:34.4 +23:34:42  2.0  8.48 118
3Eps Tri       02:04:25.1 +33:24:09  5.5  1.39 114
PPM 066820     01:59:29.7 +31:15:14  8.2  1.43 116
PPM 066898     02:03:52.8 +31:40:47  9.7  0.44 115
PPM 066918     02:05:03.5 +32:00:24 10.1  0.03 114
523601         02:05:08.7 +32:01:32 14.7       114
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.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 523601, (2024/09/29 23:22UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 37.71  87
Hamal          02:07:10.7 +23:27:41  2.0  8.48 118
3Eps Tri       02:02:57.8 +33:17:04  5.5  1.39 114
PPM 066820     01:58:03.7 +31:08:03  8.2  1.43 116
PPM 066898     02:02:26.3 +31:33:41  9.7  0.44 115
PPM 066918     02:03:36.7 +31:53:20 10.1  0.03 114
523601         02:03:42.0 +31:54:27 14.7       114
Positions are for J2000

Event circumstances last updated at 2023/12/22 05:48:36 UT

Marc W. Buie, Southwest Research Institute

RECON