RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0660:23822789 with event index number of 2284053

Geocentric closest approach at 2026/03/15 12:41:21 UTC

J2000 position of star is 18:11:40.6 -23:09:06
Equinox of date position of star is 18:13:09.8 -23:08:40
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 39 degrees from the moon. Moon is 14% illuminated.
Apparent brightness V=20.1

[RECON map]
Object is 10.4 AU from the Sun and 10.5 AU from the Earth.
Apparent velocity is 13.9 km/sec on the sky relative to the star, or, 6.6 arcsec/hr.
The 1-sigma error in the time of the event is 61 seconds.
The 1-sigma cross-track error in the shadow position is 543 km.
The sky-plane scale is 7590.6 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 5.4 sec chord
Diameter=28.9 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 459865, (2026/03/15 12:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.1 -26:29:16  0.9 23.40  61
Nunki          18:56:53.3 -26:15:42  2.0 10.38  29
11 Sgr         18:13:19.3 -23:41:37  4.5  0.55  39
PPM 268008     18:12:44.0 -23:20:37  8.2  0.23  39
459865         18:13:16.2 -23:08:37 15.5        38
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 20.5 km RECON observability=0.3 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)
Kamloops 12:41:08 -15.5 AT Down 11.6 152.1 Really Low 12:35:33 - 12:46:44 7695
Kelowna 12:41:10 -15.2 AT Down 12.6 152.9 Really Low 12:35:34 - 12:46:45 7672
Peachland 12:41:07 -15.4 AT Down 12.6 152.6 Really Low 12:35:32 - 12:46:43 7672
Summerland 12:41:06 -15.4 AT Down 12.8 152.6 Really Low 12:35:31 - 12:46:42 7668
Penticton 12:41:08 -15.3 AT Down 12.9 152.7 Really Low 12:35:32 - 12:46:43 7665
Victoria 12:40:45 -18.1 Dark Down 12.5 149.1 Really Low 12:35:10 - 12:46:21 7658
Oliver 12:41:06 -15.4 AT Down 13.2 152.7 Really Low 12:35:30 - 12:46:41 7657
Anarchist Mountain Observatory 12:41:06 -15.3 AT Down 13.4 152.8 Really Low 12:35:31 - 12:46:42 7653
Okanogan 12:41:03 -15.7 AT Down 13.9 152.6 Really Low 12:35:28 - 12:46:39 7637
Brewster 12:41:01 -15.9 AT Down 14.1 152.3 Really Low 12:35:26 - 12:46:37 7631
Manson/Chelan 12:40:58 -16.2 AT Down 14.1 152.0 Really Low 12:35:23 - 12:46:34 7628
Wenatchee 12:40:55 -16.4 AT Down 14.5 151.8 Really Low 12:35:19 - 12:46:30 7616
Ellensburg 12:40:53 -16.7 AT Down 14.8 151.5 Really Low 12:35:18 - 12:46:29 7606
Yakima 12:40:51 -16.8 AT Down 15.1 151.4 Really Low 12:35:16 - 12:46:27 7595
Sleaford 12:42:22 -6.2 NT Up 13.6 165.7 Really Low 12:36:46 - 12:47:57 7591
Toppenish/White Swan 12:40:51 -16.7 AT Down 15.4 151.6 Really Low 12:35:16 - 12:46:27 7588
The Dalles 12:40:43 -17.5 AT Down 15.8 150.7 Really Low 12:35:08 - 12:46:19 7569
PNWRO 12:40:58 -15.8 AT Down 16.2 152.9 Really Low 12:35:22 - 12:46:33 7568
Maupin 12:40:43 -17.5 AT Down 16.2 150.8 Really Low 12:35:08 - 12:46:19 7556
Sisters 12:40:36 -18.1 Dark Down 16.8 150.2 Really Low 12:35:01 - 12:46:12 7530
Bend 12:40:39 -18.0 Dark Down 17.1 150.4 Really Low 12:35:03 - 12:46:14 7521
Oregon Observatory 12:40:37 -18.2 Dark Down 17.2 150.2 Really Low 12:35:02 - 12:46:13 7517
Chiloquin 12:40:29 -18.8 Dark Down 18.1 149.6 Really Low 12:34:53 - 12:46:04 7473
Klamath Falls 12:40:28 -18.9 Dark Down 18.5 149.6 Really Low 12:34:53 - 12:46:04 7460
Cedarville 12:40:34 -17.9 AT Up 19.7 151.0 Really Low 12:34:59 - 12:46:10 7426
Fall River/Burney 12:40:26 -18.9 Dark Down 19.6 149.7 Really Low 12:34:50 - 12:46:01 7414
Greenville 12:40:25 -18.8 Dark Up 20.6 150.0 Low 12:34:50 - 12:46:01 7376
Gimple 12:40:25 -18.7 Dark Up 20.6 150.1 Low 12:34:50 - 12:46:01 7375
Quincy 12:40:24 -18.8 Dark Up 20.7 149.9 Low 12:34:49 - 12:46:00 7367
Portola 12:40:26 -18.5 Dark Up 21.0 150.3 Low 12:34:50 - 12:46:01 7360
Reno 12:40:29 -18.1 Dark Up 21.5 150.9 Low 12:34:53 - 12:46:04 7345
Carson City 12:40:28 -18.1 Dark Up 21.8 150.8 Low 12:34:53 - 12:46:04 7330
Gardnerville 12:40:27 -18.1 Dark Up 22.1 150.8 Low 12:34:52 - 12:46:03 7319
Yerington 12:40:31 -17.7 AT Up 22.3 151.4 Low 12:34:55 - 12:46:06 7317
Hawthorne 12:40:32 -17.4 AT Up 22.9 151.8 Low 12:34:57 - 12:46:08 7293
Lee Vining 12:40:28 -17.9 AT Up 23.2 151.2 Low 12:34:52 - 12:46:03 7273
Bishop 12:40:30 -17.4 AT Up 24.0 151.8 Low 12:34:54 - 12:46:05 7240
Beatty 12:40:37 -16.2 AT Up 25.0 153.2 Low 12:35:02 - 12:46:13 7205
Dunrhomin 12:41:59 -6.6 NT Up 25.2 165.3 Low 12:36:23 - 12:47:34 7202
Nikitin 12:41:57 -6.6 NT Up 25.4 165.3 Low 12:36:22 - 12:47:33 7194
CU-SBO 12:41:57 -6.6 NT Up 25.4 165.2 Low 12:36:22 - 12:47:33 7193
Patrick 12:40:51 -14.1 AT Up 27.4 155.7 Low 12:35:15 - 12:46:26 7104
Laughlin/Bullhead City 12:40:46 -14.7 AT Up 27.3 154.9 Low 12:35:10 - 12:46:21 7099
Wildwood 12:40:17 -18.2 Dark Up 26.7 150.8 Low 12:34:42 - 12:45:53 7083
Lake Havasu City 12:40:45 -14.6 AT Up 28.0 155.0 Low 12:35:10 - 12:46:21 7062
Idyllwild 12:40:27 -16.7 AT Up 27.8 152.5 Low 12:34:52 - 12:46:03 7049
Calipatria 12:40:33 -15.8 AT Up 28.8 153.5 Low 12:34:58 - 12:46:09 7004
George/Scottsdale 12:40:59 -12.6 AT Up 29.6 157.3 Low 12:35:23 - 12:46:34 6992
Yuma 12:40:37 -15.1 AT Up 29.5 154.3 Low 12:35:02 - 12:46:13 6971

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 459865, (2026/03/15 12:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.40  61
Nunki          18:55:15.9 -26:17:49  2.0 10.38  29
11 Sgr         18:11:43.4 -23:42:05  4.5  0.55  39
PPM 268008     18:11:08.3 -23:21:04  8.2  0.23  39
459865         18:11:40.6 -23:09:06 15.5        39
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:25:49 UT

Marc W. Buie, Southwest Research Institute

RECON