RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0660:24430372 with event index number of 2284135

Geocentric closest approach at 2026/04/17 09:52:41 UTC

J2000 position of star is 18:13:59.8 -22:43:06
Equinox of date position of star is 18:15:28.7 -22:42:34
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 113 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=20.0

[RECON map]
Object is 10.4 AU from the Sun and 10.0 AU from the Earth.
Apparent velocity is 5.0 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 127 seconds.
The 1-sigma cross-track error in the shadow position is 794 km.
The sky-plane scale is 7242.3 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 15.3 sec chord
Diameter=28.9 km assuming a 30% albedo -- 6.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 459865, (2026/04/17 09:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.4 -26:29:17  0.9 24.02 137
Nunki          18:56:53.6 -26:15:42  2.0 10.04 104
14 Sgr         18:15:50.7 -21:42:14  5.4  1.01 113
PPM 268070     18:14:55.4 -22:49:29  8.5  0.19 113
PPM 268101     18:16:09.1 -22:43:24  9.7  0.13 113
459865         18:15:35.3 -22:42:32 16.2       113
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 25.4 km RECON observability=0.4 and success probability=45.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:11:28 -15.5 AT Down 13.0 160.2 Really Low 10:00:22 - 10:22:34 1618
Dunrhomin 10:10:48 -22.8 Dark Down 24.2 159.4 Low 09:59:42 - 10:21:54 1083
Nikitin 10:10:49 -22.9 Dark Down 24.4 159.3 Low 09:59:43 - 10:21:55 1072
CU-SBO 10:10:49 -23.0 Dark Down 24.4 159.2 Low 09:59:43 - 10:21:55 1063
Kamloops 10:12:51 -22.4 Dark Down 10.3 147.4 Really Low 10:01:45 - 10:23:57 747
Kelowna 10:12:48 -22.7 Dark Down 11.3 148.1 Really Low 10:01:42 - 10:23:54 745
Peachland 10:12:49 -22.9 Dark Down 11.3 147.8 Really Low 10:01:43 - 10:23:55 722
Penticton 10:12:47 -23.0 Dark Down 11.6 148.0 Really Low 10:01:41 - 10:23:53 720
Summerland 10:12:48 -23.0 Dark Down 11.5 147.9 Really Low 10:01:42 - 10:23:54 718
Anarchist Mountain Observatory 10:12:47 -23.4 Dark Down 12.1 148.1 Really Low 10:01:41 - 10:23:53 698
Oliver 10:12:48 -23.3 Dark Down 11.9 147.9 Really Low 10:01:42 - 10:23:54 698
Okanogan 10:12:47 -24.0 Dark Down 12.6 147.8 Really Low 10:01:41 - 10:23:53 645
Brewster 10:12:48 -24.3 Dark Down 12.7 147.6 Really Low 10:01:42 - 10:23:54 616
Manson/Chelan 10:12:50 -24.6 Dark Down 12.8 147.2 Really Low 10:01:44 - 10:23:56 582
Wenatchee 10:12:51 -25.0 Dark Down 13.1 147.0 Really Low 10:01:45 - 10:23:57 541
PNWRO 10:12:42 -25.6 Dark Down 14.8 148.1 Really Low 10:01:36 - 10:23:48 536
Ellensburg 10:12:52 -25.5 Dark Down 13.4 146.8 Really Low 10:01:46 - 10:23:58 502
Yakima 10:12:51 -25.8 Dark Down 13.7 146.7 Really Low 10:01:45 - 10:23:57 475
Toppenish/White Swan 10:12:51 -25.9 Dark Down 13.9 146.9 Really Low 10:01:45 - 10:23:57 470
Victoria 10:13:06 -25.3 Dark Down 11.0 144.6 Really Low 10:02:00 - 10:24:12 439
The Dalles 10:12:54 -26.8 Dark Down 14.3 146.1 Really Low 10:01:48 - 10:24:00 372
Maupin 10:12:53 -27.1 Dark Down 14.7 146.1 Really Low 10:01:47 - 10:23:59 351
Sisters 10:12:55 -28.1 Dark Down 15.2 145.5 Really Low 10:01:49 - 10:24:01 262
Bend 10:12:53 -28.1 Dark Down 15.5 145.7 Really Low 10:01:47 - 10:23:59 262
Oregon Observatory 10:12:53 -28.3 Dark Down 15.6 145.6 Really Low 10:01:47 - 10:23:59 243
George/Scottsdale 10:11:09 -31.0 Dark Down 28.0 151.7 Low 10:00:03 - 10:22:15 227
Patrick 10:11:35 -31.0 Dark Down 25.7 150.3 Low 10:00:29 - 10:22:41 190
Cedarville 10:12:41 -29.7 Dark Down 18.1 146.2 Really Low 10:01:35 - 10:23:47 164
Chiloquin 10:12:53 -29.6 Dark Down 16.5 145.0 Really Low 10:01:47 - 10:23:59 128
Laughlin/Bullhead City 10:11:38 -31.6 Dark Down 25.7 149.6 Low 10:00:32 - 10:22:44 124
Klamath Falls 10:12:52 -29.8 Dark Down 16.8 145.0 Really Low 10:01:46 - 10:23:58 109
Lake Havasu City 10:11:33 -31.9 Dark Down 26.3 149.7 Low 10:00:27 - 10:22:39 98
Beatty 10:12:02 -31.5 Dark Down 23.3 148.2 Low 10:00:56 - 10:23:08 84
Hawthorne 10:12:22 -31.3 Dark Down 21.2 146.9 Low 10:01:16 - 10:23:28 64
Yerington 10:12:27 -31.2 Dark Down 20.6 146.6 Low 10:01:21 - 10:23:33 60
Reno 10:12:33 -31.1 Dark Down 19.8 146.1 Really Low 10:01:27 - 10:23:39 53
Fall River/Burney 10:12:47 -30.6 Dark Down 17.9 145.1 Really Low 10:01:41 - 10:23:53 53
Carson City 10:12:31 -31.3 Dark Down 20.1 146.1 Low 10:01:25 - 10:23:37 31
Portola 10:12:38 -31.2 Dark Down 19.4 145.6 Really Low 10:01:32 - 10:23:44 29
Gimple 10:12:41 -31.1 Dark Down 18.9 145.4 Really Low 10:01:35 - 10:23:47 25
Greenville 10:12:42 -31.1 Dark Down 18.9 145.3 Really Low 10:01:36 - 10:23:48 20
Gardnerville 10:12:30 -31.5 Dark Down 20.4 146.1 Low 10:01:24 - 10:23:36 17
Quincy 10:12:41 -31.3 Dark Down 19.0 145.3 Really Low 10:01:35 - 10:23:47 6
Bishop 10:12:16 -32.0 Dark Down 22.2 146.9 Low 10:01:10 - 10:23:22 2
Lee Vining 10:12:23 -32.0 Dark Down 21.4 146.4 Low 10:01:17 - 10:23:29 -7
Yuma 10:11:25 -33.4 Dark Down 27.8 148.9 Low 10:00:19 - 10:22:31 -42
Calipatria 10:11:34 -33.6 Dark Down 27.0 148.2 Low 10:00:28 - 10:22:40 -79
Idyllwild 10:11:47 -33.8 Dark Down 26.0 147.4 Low 10:00:41 - 10:22:53 -124
Wildwood 10:12:02 -34.6 Dark Down 24.8 145.8 Low 10:00:56 - 10:23:08 -235

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, (2026/04/17 09:53UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 24.02 137
Nunki          18:55:15.9 -26:17:49  2.0 10.04 104
14 Sgr         18:14:15.9 -21:42:48  5.4  1.01 113
PPM 268070     18:13:19.8 -22:50:02  8.5  0.19 113
PPM 268101     18:14:33.5 -22:44:00  9.7  0.13 113
459865         18:13:59.8 -22:43:06 16.2       113
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:26:16 UT

Marc W. Buie, Southwest Research Institute

RECON