RECON: TNO occultation with 543377

Event between (543377) 14BF70 and star GA0620:06677272 with event index number of 2252823

Geocentric closest approach at 2025/05/24 03:55:01 UTC

J2000 position of star is 14:10:41.3 -26:14:48
Equinox of date position of star is 14:12:05.2 -26:21:40
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 160 degrees from the moon. Moon is 13% illuminated.
Apparent brightness V=20.2

[RECON map]
Object is 11.6 AU from the Sun and 10.7 AU from the Earth.
Apparent velocity is 15.4 km/sec on the sky relative to the star, or, 7.2 arcsec/hr.
The 1-sigma error in the time of the event is 35 seconds.
The 1-sigma cross-track error in the shadow position is 468 km.
The sky-plane scale is 7743.4 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=75.5 km assuming a 5% albedo -- 5.0 sec chord
Diameter=30.8 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 543377, (2025/05/24 03:53UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:32.1 -11:17:35  1.0 18.51 178
5The Cen       14:08:11.3 -36:29:35  2.1 10.16 152
PPM 262646     14:14:40.8 -26:43:49  6.4  0.67 159
PPM 262543     14:10:01.2 -26:46:22  8.5  0.63 160
PPM 262571     14:11:18.2 -26:21:54  9.3  0.19 160
543377         14:12:08.5 -26:21:56 16.6       159
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 5.0 sigma about the mid-time.
The median site spacing is 0.0 km RECON observability=0.1 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 03:59:18 -7.1 NT Down 10.3 164.8 Really Low 03:55:54 - 04:02:41 6314
Dunrhomin 03:59:16 -16.2 AT Down 21.9 164.5 Low 03:55:53 - 04:02:40 5856
Nikitin 03:59:16 -16.3 AT Down 22.0 164.5 Low 03:55:53 - 04:02:40 5846
CU-SBO 03:59:17 -16.3 AT Down 22.1 164.4 Low 03:55:54 - 04:02:41 5839
Kamloops 04:00:05 -1.5 CT Down 8.3 152.2 Really Low 03:56:42 - 04:03:29 5657
Kelowna 04:00:04 -2.4 CT Down 9.3 152.9 Really Low 03:56:41 - 04:03:28 5656
Peachland 04:00:04 -2.3 CT Down 9.3 152.6 Really Low 03:56:41 - 04:03:28 5638
Penticton 04:00:04 -2.6 CT Down 9.6 152.8 Really Low 03:56:40 - 04:03:27 5636
Summerland 04:00:05 -2.5 CT Down 9.5 152.7 Really Low 03:56:41 - 04:03:28 5635
Anarchist Mountain Observatory 04:00:04 -3.0 CT Down 10.1 152.9 Really Low 03:56:41 - 04:03:28 5620
Oliver 04:00:04 -2.8 CT Down 9.9 152.7 Really Low 03:56:41 - 04:03:28 5619
Okanogan 04:00:07 -3.2 CT Down 10.6 152.7 Really Low 03:56:43 - 04:03:30 5577
Brewster 04:00:07 -3.3 CT Down 10.8 152.5 Really Low 03:56:43 - 04:03:30 5554
Manson/Chelan 04:00:09 -3.2 CT Down 10.9 152.1 Really Low 03:56:45 - 04:03:32 5527
Wenatchee 04:00:09 -3.4 CT Down 11.2 151.9 Really Low 03:56:46 - 04:03:33 5494
PNWRO 04:00:06 -5.0 CT Down 12.9 153.0 Really Low 03:56:43 - 04:03:30 5487
Ellensburg 04:00:10 -3.5 CT Down 11.5 151.7 Really Low 03:56:47 - 04:03:34 5462
Yakima 04:00:11 -3.8 CT Down 11.9 151.7 Really Low 03:56:48 - 04:03:35 5440
Toppenish/White Swan 04:00:11 -4.0 CT Down 12.1 151.8 Really Low 03:56:47 - 04:03:34 5436
Victoria 04:00:17 -1.1 CT Down 9.3 149.5 Really Low 03:56:53 - 04:03:40 5411
The Dalles 04:00:14 -4.0 CT Down 12.6 151.0 Really Low 03:56:51 - 04:03:38 5356
Maupin 04:00:15 -4.3 CT Down 13.0 151.1 Really Low 03:56:51 - 04:03:38 5338
Sisters 04:00:16 -4.5 CT Down 13.6 150.6 Really Low 03:56:53 - 04:03:40 5265
Bend 04:00:16 -4.8 CT Down 13.9 150.8 Really Low 03:56:53 - 04:03:40 5264
Oregon Observatory 04:00:17 -4.9 CT Down 14.0 150.6 Really Low 03:56:53 - 04:03:40 5248
Cedarville 04:00:15 -7.0 NT Down 16.5 151.4 Really Low 03:56:51 - 04:03:38 5175
Chiloquin 04:00:20 -5.4 CT Down 15.0 150.1 Really Low 03:56:56 - 04:03:43 5150
George/Scottsdale 03:59:43 -16.9 AT Down 26.3 157.4 Low 03:56:20 - 04:03:07 5144
Patrick 03:59:53 -14.6 AT Down 24.1 155.9 Low 03:56:29 - 04:03:16 5139
Klamath Falls 04:00:19 -5.6 CT Down 15.3 150.2 Really Low 03:56:56 - 04:03:43 5134
Laughlin/Bullhead City 03:59:55 -14.3 AT Down 24.1 155.2 Low 03:56:32 - 04:03:19 5085
Fall River/Burney 04:00:19 -6.5 NT Down 16.5 150.3 Really Low 03:56:56 - 04:03:43 5083
Yerington 04:00:12 -9.1 NT Down 19.1 151.9 Really Low 03:56:48 - 04:03:35 5075
Hawthorne 04:00:10 -9.7 NT Down 19.7 152.3 Really Low 03:56:47 - 04:03:34 5074
Beatty 04:00:04 -11.8 NT Down 21.8 153.6 Low 03:56:40 - 04:03:27 5074
Reno 04:00:14 -8.4 NT Down 18.4 151.4 Really Low 03:56:51 - 04:03:38 5074
Lake Havasu City 03:59:54 -14.9 AT Down 24.8 155.3 Low 03:56:30 - 04:03:17 5057
Portola 04:00:17 -7.8 NT Down 17.9 150.9 Really Low 03:56:53 - 04:03:40 5056
Gimple 04:00:18 -7.4 NT Down 17.4 150.6 Really Low 03:56:54 - 04:03:41 5055
Carson City 04:00:14 -8.6 NT Down 18.7 151.4 Really Low 03:56:51 - 04:03:38 5053
Greenville 04:00:18 -7.3 NT Down 17.4 150.6 Really Low 03:56:54 - 04:03:41 5051
Gardnerville 04:00:15 -8.8 NT Down 18.9 151.4 Really Low 03:56:51 - 04:03:38 5041
Quincy 04:00:18 -7.4 NT Down 17.6 150.5 Really Low 03:56:55 - 04:03:42 5039
Bishop 04:00:10 -10.5 NT Down 20.8 152.3 Low 03:56:47 - 04:03:34 5015
Lee Vining 04:00:13 -9.7 NT Down 20.0 151.8 Low 03:56:49 - 04:03:36 5014
Yuma 03:59:54 -15.8 AT Down 26.3 154.7 Low 03:56:31 - 04:03:18 4925
Calipatria 03:59:57 -14.9 AT Down 25.6 154.0 Low 03:56:34 - 04:03:21 4902
Idyllwild 04:00:03 -13.8 AT Down 24.6 153.0 Low 03:56:40 - 04:03:27 4876
Wildwood 04:00:11 -12.3 AT Down 23.6 151.5 Low 03:56:48 - 04:03:35 4793

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 543377, (2025/05/24 03:53UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 18.51 178
5The Cen       14:06:40.0 -36:22:23  2.1 10.16 152
PPM 262646     14:13:13.3 -26:36:45  6.4  0.67 159
PPM 262543     14:08:34.0 -26:39:12  8.5  0.63 160
PPM 262571     14:09:51.1 -26:14:45  9.3  0.19 160
543377         14:10:41.3 -26:14:48 16.6       160
Positions are for J2000

Event circumstances last updated at 2024/06/13 03:51:03 UT

Marc W. Buie, Southwest Research Institute

RECON