RECON: TNO occultation with 535028

Event between (535028) 14WA510 and star GA0940:03606371 with event index number of 2261700

Geocentric closest approach at 2025/01/28 12:54:06 UTC

J2000 position of star is 11:36:47.3 +04:42:41
Equinox of date position of star is 11:38:02.3 +04:34:36
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 123 degrees from the moon. Moon is 1% illuminated.
Apparent brightness V=22.7

[RECON map]
Object is 45.5 AU from the Sun and 44.8 AU from the Earth.
Apparent velocity is 17.1 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 300 seconds.
The 1-sigma cross-track error in the shadow position is 2777 km.
The sky-plane scale is 32486.5 km/arcsec.

The object has an absolute magnitude Hv=6.0
Diameter=387.3 km assuming a 5% albedo -- 22.6 sec chord
Diameter=158.1 km assuming a 30% albedo -- 9.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 535028, (2025/01/28 12:39UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:42.3 +11:50:37  1.3 23.03 146
Denebola       11:50:20.3 +14:25:55  2.1 10.31 125
89 Leo         11:35:39.0 +02:55:14  6.2  1.76 123
PPM 158062     11:40:01.8 +04:17:15  8.3  0.56 123
PPM 158032     11:38:26.6 +04:49:26  9.1  0.27 123
PPM 158033     11:38:31.5 +04:42:01 10.9  0.17 123
535028         11:38:04.7 +04:34:21 15.7       123
Positions are for equinox of date

This table contains the target star visibility for the RECON network. The observing range has been set to a maximum of 3.0 sigma about the mid-time.
The median site spacing is 11.9 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 12:53:49 -17.6 AT Down 31.6 230.7 Up 12:38:49 - 13:08:49 13197
Kamloops 12:54:26 -26.5 Dark Down 38.7 215.6 Up 12:39:26 - 13:09:26 12730
Kelowna 12:54:19 -26.0 Dark Down 39.1 217.0 Up 12:39:19 - 13:09:19 12714
Peachland 12:54:20 -26.1 Dark Down 39.3 216.7 Up 12:39:20 - 13:09:20 12699
Summerland 12:54:20 -26.1 Dark Down 39.4 216.9 Up 12:39:20 - 13:09:20 12694
Penticton 12:54:17 -26.0 Dark Down 39.4 217.0 Up 12:39:17 - 13:09:17 12694
Oliver 12:54:17 -26.0 Dark Down 39.7 217.2 Up 12:39:17 - 13:09:17 12675
Anarchist Mountain Observatory 12:54:15 -25.9 Dark Down 39.7 217.5 Up 12:39:15 - 13:09:15 12672
Okanogan 12:54:15 -26.1 Dark Down 40.3 217.6 Up 12:39:15 - 13:09:15 12630
Dunrhomin 12:52:50 -15.4 AT Down 38.3 237.9 Up 12:37:50 - 13:07:50 12622
Nikitin 12:52:50 -15.4 AT Down 38.4 238.0 Up 12:37:50 - 13:07:50 12610
Brewster 12:54:14 -26.2 Dark Down 40.6 217.5 Up 12:39:14 - 13:09:14 12608
CU-SBO 12:52:51 -15.4 AT Down 38.5 238.0 Up 12:37:51 - 13:07:51 12604
Manson/Chelan 12:54:14 -26.5 Dark Down 40.9 217.2 Up 12:39:14 - 13:09:14 12585
Wenatchee 12:54:08 -26.6 Dark Down 41.4 217.2 Up 12:39:08 - 13:09:08 12553
Ellensburg 12:54:12 -26.8 Dark Down 41.8 217.1 Up 12:39:12 - 13:09:12 12522
Victoria 12:54:28 -28.6 Dark Down 41.6 212.9 Up 12:39:28 - 13:09:28 12519
PNWRO 12:53:57 -25.7 Dark Down 41.9 219.6 Up 12:38:57 - 13:08:57 12518
Yakima 12:54:12 -26.8 Dark Down 42.1 217.3 Up 12:39:12 - 13:09:12 12498
Toppenish/White Swan 12:54:08 -26.7 Dark Down 42.2 217.6 Up 12:39:08 - 13:09:08 12491
The Dalles 12:54:06 -27.3 Dark Down 43.2 217.1 Up 12:39:06 - 13:09:06 12419
Maupin 12:54:06 -27.2 Dark Down 43.5 217.5 Up 12:39:06 - 13:09:06 12397
Sisters 12:54:03 -27.6 Dark Down 44.4 217.4 Up 12:39:03 - 13:09:03 12327
Bend 12:54:03 -27.4 Dark Down 44.5 217.8 Up 12:39:03 - 13:09:03 12321
Oregon Observatory 12:54:03 -27.5 Dark Down 44.7 217.8 Up 12:39:03 - 13:09:03 12306
Chiloquin 12:54:00 -27.9 Dark Down 45.9 218.0 Up 12:39:00 - 13:09:00 12208
Cedarville 12:53:49 -26.6 Dark Down 45.9 220.8 Up 12:38:49 - 13:08:49 12200
Klamath Falls 12:53:57 -27.8 Dark Down 46.1 218.3 Up 12:38:57 - 13:08:57 12189
Fall River/Burney 12:53:52 -27.5 Dark Down 46.9 219.6 Up 12:38:52 - 13:08:52 12124
Gimple 12:53:44 -27.2 Dark Down 47.3 220.9 Up 12:38:44 - 13:08:44 12083
Reno 12:53:40 -26.3 Dark Down 47.3 222.6 Up 12:38:40 - 13:08:40 12080
Greenville 12:53:43 -27.2 Dark Down 47.4 220.7 Up 12:38:43 - 13:08:43 12080
Portola 12:53:42 -26.8 Dark Down 47.4 221.6 Up 12:38:42 - 13:08:42 12075
Yerington 12:53:33 -25.8 Dark Down 47.3 223.8 Up 12:38:33 - 13:08:33 12066
Quincy 12:53:43 -27.2 Dark Down 47.5 220.9 Up 12:38:43 - 13:08:43 12066
Carson City 12:53:36 -26.3 Dark Down 47.5 222.9 Up 12:38:36 - 13:08:36 12057
Hawthorne 12:53:30 -25.4 Dark Down 47.4 224.8 Up 12:38:30 - 13:08:30 12054
Gardnerville 12:53:35 -26.3 Dark Down 47.7 223.1 Up 12:38:35 - 13:08:35 12042
Patrick 12:53:00 -21.4 Dark Down 46.6 232.7 Up 12:38:00 - 13:08:00 12011
Beatty 12:53:14 -23.8 Dark Down 47.5 228.2 Up 12:38:14 - 13:08:14 12009
Lee Vining 12:53:30 -25.8 Dark Down 48.0 224.6 Up 12:38:30 - 13:08:30 11997
Bishop 12:53:26 -25.1 Dark Down 48.1 225.9 Up 12:38:26 - 13:08:26 11982
Laughlin/Bullhead City 12:52:58 -22.0 Dark Down 47.3 232.1 Up 12:37:58 - 13:07:58 11967
George/Scottsdale 12:52:43 -19.6 Dark Down 46.3 236.2 Up 12:37:43 - 13:07:43 11964
Lake Havasu City 12:52:54 -21.7 Dark Down 47.5 233.0 Up 12:37:54 - 13:07:54 11929
Yuma 12:52:49 -21.7 Dark Down 48.8 234.2 Up 12:37:49 - 13:07:49 11786
Idyllwild 12:53:05 -23.5 Dark Down 49.5 231.0 Up 12:38:05 - 13:08:05 11785
Calipatria 12:52:53 -22.5 Dark Down 49.1 232.8 Up 12:37:53 - 13:07:53 11784
Wildwood 12:53:12 -25.1 Dark Down 50.4 228.4 Up 12:38:12 - 13:08:12 11739

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 535028, (2025/01/28 12:39UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 23.03 146
Denebola       11:49:02.8 +14:34:17  2.1 10.31 125
89 Leo         11:34:21.7 +03:03:34  6.2  1.76 123
PPM 158062     11:38:44.5 +04:25:36  8.3  0.56 123
PPM 158032     11:37:09.2 +04:57:47  9.1  0.27 123
PPM 158033     11:37:14.1 +04:50:21 10.9  0.17 123
535028         11:36:47.3 +04:42:41 15.7       123
Positions are for J2000

Event circumstances last updated at 2024/04/18 03:38:26 UT

Marc W. Buie, Southwest Research Institute

RECON