RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0680:19515254 with event index number of 2284503

Geocentric closest approach at 2026/07/23 04:30:11 UTC

J2000 position of star is 17:51:16.1 -21:29:25
Equinox of date position of star is 17:52:44.2 -21:29:42
Stellar brightness G=16.9, 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 67% illuminated.
Apparent brightness V=19.9

[RECON map]
Object is 10.6 AU from the Sun and 9.7 AU from the Earth.
Apparent velocity is 16.1 km/sec on the sky relative to the star, or, 8.2 arcsec/hr.
The 1-sigma error in the time of the event is 54 seconds.
The 1-sigma cross-track error in the shadow position is 483 km.
The sky-plane scale is 7058.7 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 4.7 sec chord
Diameter=28.9 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 459865, (2026/07/23 04:34UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.4 -26:29:19  0.9 19.32  20
35Eta Oph      17:11:54.2 -15:45:21  2.6 11.27  31
PPM 267309     17:49:22.0 -22:29:07  6.1  1.28  38
PPM 267354     17:51:02.4 -20:50:14  8.0  0.78  39
PPM 267394     17:52:23.7 -21:47:48  8.6  0.32  39
459865         17:52:51.7 -21:29:44 16.9        39
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 19.0 km RECON observability=0.2 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 04:31:49 -10.0 NT Up 16.3 175.3 Really Low 04:26:52 - 04:36:47 7142
Kamloops 04:32:47 -4.9 CT Up 15.9 161.6 Really Low 04:27:49 - 04:37:44 6816
Kelowna 04:32:44 -5.9 CT Up 16.9 162.4 Really Low 04:27:47 - 04:37:42 6802
Peachland 04:32:46 -5.8 CT Up 16.9 162.1 Really Low 04:27:48 - 04:37:43 6791
Summerland 04:32:45 -6.0 CT Up 17.1 162.1 Really Low 04:27:48 - 04:37:43 6786
Penticton 04:32:45 -6.1 NT Up 17.1 162.2 Really Low 04:27:47 - 04:37:42 6786
Oliver 04:32:46 -6.3 NT Up 17.5 162.2 Really Low 04:27:48 - 04:37:43 6771
Anarchist Mountain Observatory 04:32:45 -6.5 NT Up 17.7 162.4 Really Low 04:27:48 - 04:37:43 6768
Okanogan 04:32:47 -6.8 NT Up 18.3 162.1 Really Low 04:27:49 - 04:37:44 6735
Brewster 04:32:48 -6.9 NT Up 18.5 161.9 Really Low 04:27:51 - 04:37:46 6718
Manson/Chelan 04:32:50 -6.9 NT Up 18.6 161.5 Really Low 04:27:52 - 04:37:47 6700
Wenatchee 04:32:51 -7.1 NT Up 19.0 161.3 Really Low 04:27:53 - 04:37:48 6674
Victoria 04:33:02 -4.8 CT Up 17.3 158.6 Really Low 04:28:05 - 04:38:00 6653
Dunrhomin 04:31:44 -19.7 Dark Up 28.1 175.7 Low 04:26:46 - 04:36:41 6650
Ellensburg 04:32:52 -7.2 NT Up 19.4 161.1 Really Low 04:27:55 - 04:37:50 6650
PNWRO 04:32:46 -8.7 NT Up 20.6 162.5 Low 04:27:49 - 04:37:44 6642
Nikitin 04:31:44 -19.8 Dark Up 28.3 175.6 Low 04:26:47 - 04:36:42 6640
CU-SBO 04:31:45 -19.8 Dark Up 28.4 175.5 Low 04:26:47 - 04:36:42 6635
Yakima 04:32:52 -7.5 NT Up 19.7 161.0 Really Low 04:27:55 - 04:37:50 6630
Toppenish/White Swan 04:32:52 -7.7 NT Up 20.0 161.1 Really Low 04:27:54 - 04:37:49 6624
The Dalles 04:32:56 -7.8 NT Up 20.5 160.3 Low 04:27:59 - 04:37:54 6567
Maupin 04:32:56 -8.1 NT Up 21.0 160.3 Low 04:27:59 - 04:37:54 6548
Sisters 04:32:59 -8.4 NT Up 21.7 159.8 Low 04:28:02 - 04:37:57 6492
Bend 04:32:58 -8.7 NT Up 21.9 160.0 Low 04:28:01 - 04:37:56 6486
Oregon Observatory 04:33:00 -8.7 NT Up 22.1 159.8 Low 04:28:02 - 04:37:57 6474
Chiloquin 04:33:02 -9.3 NT Up 23.2 159.2 Low 04:28:05 - 04:38:00 6393
Cedarville 04:32:56 -11.0 NT Up 24.6 160.7 Low 04:27:59 - 04:37:54 6379
Klamath Falls 04:33:02 -9.6 NT Up 23.6 159.3 Low 04:28:05 - 04:38:00 6376
Fall River/Burney 04:33:02 -10.6 NT Up 24.8 159.5 Low 04:28:04 - 04:37:59 6319
Gimple 04:33:00 -11.4 NT Up 25.7 159.8 Low 04:28:02 - 04:37:57 6281
Greenville 04:33:00 -11.4 NT Up 25.7 159.7 Low 04:28:03 - 04:37:58 6279
Reno 04:32:55 -12.4 AT Up 26.6 160.8 Low 04:27:57 - 04:37:52 6275
Portola 04:32:58 -11.9 NT Up 26.2 160.2 Low 04:28:00 - 04:37:55 6273
Quincy 04:33:01 -11.5 NT Up 25.9 159.7 Low 04:28:03 - 04:37:58 6267
Yerington 04:32:52 -13.2 AT Up 27.3 161.3 Low 04:27:55 - 04:37:50 6259
Carson City 04:32:56 -12.7 AT Up 26.9 160.7 Low 04:27:58 - 04:37:53 6254
Hawthorne 04:32:50 -13.8 AT Up 27.8 161.8 Low 04:27:53 - 04:37:48 6245
Gardnerville 04:32:55 -12.9 AT Up 27.2 160.7 Low 04:27:58 - 04:37:53 6241
Lee Vining 04:32:53 -13.9 AT Up 28.2 161.2 Low 04:27:55 - 04:37:50 6199
Beatty 04:32:42 -15.9 AT Up 29.8 163.4 Low 04:27:44 - 04:37:39 6195
Bishop 04:32:50 -14.7 AT Up 29.0 161.8 Low 04:27:52 - 04:37:47 6181
Patrick 04:32:28 -18.6 Dark Up 31.9 166.1 Up 04:27:30 - 04:37:25 6176
Laughlin/Bullhead City 04:32:31 -18.4 Dark Up 31.9 165.4 Up 04:27:34 - 04:37:29 6142
George/Scottsdale 04:32:17 -21.0 Dark Up 33.9 168.0 Up 04:27:20 - 04:37:15 6118
Lake Havasu City 04:32:30 -19.0 Dark Up 32.7 165.5 Up 04:27:33 - 04:37:28 6106
Idyllwild 04:32:43 -18.0 Dark Up 32.9 162.9 Up 04:27:45 - 04:37:40 5995
Calipatria 04:32:36 -19.2 Dark Up 33.7 164.0 Up 04:27:38 - 04:37:33 5985
Yuma 04:32:32 -20.0 Dark Up 34.3 164.9 Up 04:27:34 - 04:37:29 5979
Wildwood 04:32:52 -16.6 AT Up 32.0 161.0 Up 04:27:55 - 04:37:50 5966

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, (2026/07/23 04:34UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.32  20
35Eta Oph      17:10:22.7 -15:43:29  2.6 11.27  31
PPM 267309     17:47:45.6 -22:28:40  6.1  1.28  38
PPM 267354     17:49:27.2 -20:49:51  8.0  0.78  39
PPM 267394     17:50:47.8 -21:47:28  8.6  0.32  39
459865         17:51:16.1 -21:29:25 16.9        39
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:32:03 UT

Marc W. Buie, Southwest Research Institute

RECON