RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0620:14564837 with event index number of 2282724

Geocentric closest approach at 2025/06/03 09:11:51 UTC

J2000 position of star is 17:12:07.9 -26:40:24
Equinox of date position of star is 17:13:39.2 -26:42:04
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 94 degrees from the moon. Moon is 52% illuminated.
Apparent brightness V=19.3

[RECON map]
Object is 9.9 AU from the Sun and 8.9 AU from the Earth.
Apparent velocity is 20.0 km/sec on the sky relative to the star, or, 11.2 arcsec/hr.
The 1-sigma error in the time of the event is 32 seconds.
The 1-sigma cross-track error in the shadow position is 387 km.
The sky-plane scale is 6433.6 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 3.8 sec chord
Diameter=28.9 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 459865, (2025/06/03 09:14UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:58.2 -26:29:10  0.9  9.55  84
23Tau Sco      16:37:28.2 -28:15:59  2.8  8.19  86
PPM 266626     17:17:47.5 -26:34:46  6.5  0.92  95
PPM 266531     17:13:11.7 -26:43:55  7.7  0.12  94
459865         17:13:42.8 -26:42:08 16.4        94
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=0.5 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 09:11:48 -10.3 NT Down 8.0 203.4 Really Low 09:08:38 - 09:14:59 7881
Kamloops 09:12:33 -15.2 AT Down 11.9 190.8 Really Low 09:09:22 - 09:15:43 7748
Kelowna 09:12:28 -15.8 AT Down 12.6 191.6 Really Low 09:09:17 - 09:15:38 7741
Peachland 09:12:29 -16.0 AT Down 12.8 191.4 Really Low 09:09:18 - 09:15:39 7736
Summerland 09:12:29 -16.1 AT Down 12.9 191.4 Really Low 09:09:18 - 09:15:39 7734
Penticton 09:12:29 -16.1 AT Down 13.0 191.5 Really Low 09:09:18 - 09:15:39 7733
Oliver 09:12:28 -16.5 AT Down 13.3 191.6 Really Low 09:09:18 - 09:15:39 7726
Anarchist Mountain Observatory 09:12:28 -16.6 AT Down 13.5 191.7 Really Low 09:09:17 - 09:15:38 7725
Okanogan 09:12:27 -17.3 AT Down 14.1 191.6 Really Low 09:09:16 - 09:15:37 7706
Brewster 09:12:28 -17.6 AT Down 14.4 191.4 Really Low 09:09:17 - 09:15:38 7697
Manson/Chelan 09:12:28 -17.8 AT Down 14.7 191.1 Really Low 09:09:18 - 09:15:39 7688
Wenatchee 09:12:28 -18.3 Dark Down 15.2 190.9 Really Low 09:09:18 - 09:15:39 7673
Ellensburg 09:12:29 -18.8 Dark Down 15.6 190.8 Really Low 09:09:18 - 09:15:39 7660
Victoria 09:12:40 -17.8 AT Down 14.4 188.1 Really Low 09:09:30 - 09:15:51 7660
PNWRO 09:12:21 -19.3 Dark Down 16.3 192.3 Really Low 09:09:11 - 09:15:32 7653
Yakima 09:12:29 -19.1 Dark Down 16.0 190.8 Really Low 09:09:18 - 09:15:39 7648
Toppenish/White Swan 09:12:27 -19.3 Dark Down 16.2 190.9 Really Low 09:09:16 - 09:15:37 7645
The Dalles 09:12:29 -20.2 Dark Down 17.0 190.3 Really Low 09:09:19 - 09:15:40 7612
Maupin 09:12:29 -20.6 Dark Down 17.4 190.4 Really Low 09:09:18 - 09:15:39 7601
Dunrhomin 09:11:20 -20.2 Dark Down 18.6 205.1 Really Low 09:08:10 - 09:14:31 7578
Nikitin 09:11:20 -20.4 Dark Down 18.8 205.1 Really Low 09:08:10 - 09:14:31 7571
CU-SBO 09:11:20 -20.4 Dark Down 18.9 205.0 Really Low 09:08:10 - 09:14:31 7569
Sisters 09:12:29 -21.5 Dark Down 18.4 190.0 Really Low 09:09:19 - 09:15:40 7567
Bend 09:12:28 -21.7 Dark Down 18.6 190.2 Really Low 09:09:18 - 09:15:39 7563
Oregon Observatory 09:12:28 -21.9 Dark Down 18.8 190.1 Really Low 09:09:18 - 09:15:39 7556
Chiloquin 09:12:28 -23.3 Dark Down 20.1 189.8 Low 09:09:18 - 09:15:39 7505
Klamath Falls 09:12:28 -23.6 Dark Down 20.4 189.9 Low 09:09:18 - 09:15:39 7494
Cedarville 09:12:21 -23.9 Dark Down 20.9 191.4 Low 09:09:10 - 09:15:31 7492
Fall River/Burney 09:12:25 -24.6 Dark Down 21.5 190.3 Low 09:09:15 - 09:15:36 7456
Gimple 09:12:22 -25.4 Dark Down 22.4 190.9 Low 09:09:11 - 09:15:32 7429
Greenville 09:12:22 -25.4 Dark Down 22.4 190.8 Low 09:09:11 - 09:15:32 7428
Portola 09:12:21 -25.6 Dark Down 22.6 191.3 Low 09:09:10 - 09:15:31 7423
Reno 09:12:16 -25.7 Dark Down 22.8 191.9 Low 09:09:06 - 09:15:27 7421
Quincy 09:12:22 -25.6 Dark Down 22.6 190.8 Low 09:09:11 - 09:15:32 7420
Yerington 09:12:13 -26.0 Dark Down 23.2 192.6 Low 09:09:03 - 09:15:24 7408
Carson City 09:12:16 -26.0 Dark Down 23.1 192.0 Low 09:09:05 - 09:15:26 7407
Gardnerville 09:12:16 -26.2 Dark Down 23.4 192.0 Low 09:09:05 - 09:15:26 7398
Hawthorne 09:12:10 -26.3 Dark Down 23.6 193.1 Low 09:09:00 - 09:15:21 7396
Lee Vining 09:12:12 -27.0 Dark Down 24.2 192.7 Low 09:09:01 - 09:15:22 7366
Beatty 09:12:01 -27.3 Dark Down 24.8 195.1 Low 09:08:50 - 09:15:11 7350
Bishop 09:12:08 -27.3 Dark Down 24.7 193.5 Low 09:08:57 - 09:15:18 7349
Patrick 09:11:46 -27.7 Dark Down 25.6 198.0 Low 09:08:35 - 09:14:56 7316
Laughlin/Bullhead City 09:11:49 -28.2 Dark Down 26.0 197.3 Low 09:08:38 - 09:14:59 7296
Lake Havasu City 09:11:47 -28.7 Dark Down 26.6 197.7 Low 09:08:36 - 09:14:57 7267
George/Scottsdale 09:11:35 -28.5 Dark Down 26.7 200.1 Low 09:08:24 - 09:14:45 7254
Idyllwild 09:11:56 -30.2 Dark Down 27.9 195.5 Low 09:08:45 - 09:15:06 7203
Wildwood 09:12:04 -30.5 Dark Down 27.9 193.6 Low 09:08:54 - 09:15:15 7194
Calipatria 09:11:50 -30.4 Dark Down 28.2 196.7 Low 09:08:39 - 09:15:00 7185
Yuma 09:11:45 -30.4 Dark Down 28.4 197.6 Low 09:08:34 - 09:14:55 7174

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, (2025/06/03 09:14UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.55  84
23Tau Sco      16:35:52.9 -28:12:58  2.8  8.19  86
PPM 266626     17:16:12.6 -26:33:11  6.5  0.92  95
PPM 266531     17:11:36.8 -26:42:10  7.7  0.12  94
459865         17:12:07.9 -26:40:24 16.4        94
Positions are for J2000

Event circumstances last updated at 2024/06/13 03:51:50 UT

Marc W. Buie, Southwest Research Institute

RECON