RECON: TNO occultation with 281371

Event between (281371) 08FC76 and star GA0760:04154232 with event index number of 2458240

Geocentric closest approach at 2026/12/19 13:36:49 UTC

J2000 position of star is 09:15:53.6 -12:58:19
Equinox of date position of star is 09:17:03.4 -13:04:27
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 119 degrees from the moon. Moon is 74% illuminated.
Apparent brightness V=21.6

[RECON map]
Object is 15.4 AU from the Sun and 14.9 AU from the Earth.
Apparent velocity is 15.3 km/sec on the sky relative to the star, or, 5.1 arcsec/hr.
The 1-sigma error in the time of the event is 64 seconds.
The 1-sigma cross-track error in the shadow position is 863 km.
The sky-plane scale is 10830.8 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=83.2 km assuming a 5% albedo -- 5.0 sec chord
Diameter=34.0 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 281371, (2026/12/19 13:34UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:48.4 +11:50:04  1.3 28.13 124
Alphard        09:28:54.8 -08:46:37  2.0  5.18 121
26 Hya         09:21:04.3 -12:05:24  4.1  1.38 119
PPM 221275     09:16:58.4 -13:14:42  7.6  0.17 119
281371         09:17:11.1 -13:05:08 15.9       119
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 25.7 km RECON observability=0.8 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 13:31:34 -22.1 Dark Down 20.6 213.2 Low 13:25:43 - 13:37:24 4602
Victoria 13:31:42 -23.6 Dark Down 23.5 210.7 Low 13:25:51 - 13:37:32 4582
Peachland 13:31:31 -21.5 Dark Down 21.2 213.9 Low 13:25:40 - 13:37:21 4514
Kelowna 13:31:30 -21.4 Dark Down 21.0 214.2 Low 13:25:39 - 13:37:20 4509
Summerland 13:31:31 -21.4 Dark Down 21.2 214.1 Low 13:25:40 - 13:37:21 4500
Penticton 13:31:30 -21.4 Dark Down 21.3 214.2 Low 13:25:39 - 13:37:20 4490
Oliver 13:31:30 -21.3 Dark Down 21.6 214.3 Low 13:25:39 - 13:37:20 4466
Anarchist Mountain Observatory 13:31:28 -21.1 Dark Down 21.6 214.5 Low 13:25:38 - 13:37:19 4446
Okanogan 13:31:30 -21.1 Dark Down 22.2 214.4 Low 13:25:40 - 13:37:21 4409
Manson/Chelan 13:31:32 -21.4 Dark Down 22.8 214.0 Low 13:25:41 - 13:37:22 4399
Brewster 13:31:30 -21.2 Dark Down 22.5 214.3 Low 13:25:40 - 13:37:21 4398
Wenatchee 13:31:32 -21.4 Dark Down 23.3 213.9 Low 13:25:41 - 13:37:22 4372
Ellensburg 13:31:33 -21.5 Dark Down 23.7 213.8 Low 13:25:42 - 13:37:23 4352
Yakima 13:31:32 -21.4 Dark Down 24.1 213.9 Low 13:25:42 - 13:37:23 4324
Toppenish/White Swan 13:31:32 -21.3 Dark Down 24.2 214.1 Low 13:25:41 - 13:37:22 4301
The Dalles 13:31:36 -21.6 Dark Down 25.1 213.6 Low 13:25:45 - 13:37:26 4279
Maupin 13:31:34 -21.5 Dark Down 25.4 213.8 Low 13:25:44 - 13:37:25 4244
PNWRO 13:31:27 -20.2 Dark Down 23.9 215.7 Low 13:25:37 - 13:37:18 4208
Sisters 13:31:36 -21.6 Dark Down 26.4 213.5 Low 13:25:46 - 13:37:27 4202
Bend 13:31:35 -21.4 Dark Down 26.5 213.8 Low 13:25:44 - 13:37:25 4173
Oregon Observatory 13:31:35 -21.4 Dark Down 26.7 213.8 Low 13:25:45 - 13:37:26 4166
Sleaford 13:30:57 -13.9 AT Down 13.8 226.2 Really Low 13:25:07 - 13:36:48 4154
Chiloquin 13:31:37 -21.4 Dark Down 27.9 213.7 Low 13:25:46 - 13:37:27 4088
Klamath Falls 13:31:37 -21.3 Dark Down 28.2 213.9 Low 13:25:46 - 13:37:27 4058
Fall River/Burney 13:31:36 -20.8 Dark Down 29.0 214.7 Low 13:25:46 - 13:37:27 3950
Cedarville 13:31:32 -20.0 Dark Down 28.1 215.7 Low 13:25:42 - 13:37:23 3929
Greenville 13:31:36 -20.2 Dark Down 29.5 215.4 Low 13:25:45 - 13:37:26 3859
Gimple 13:31:34 -20.2 Dark Down 29.5 215.5 Low 13:25:44 - 13:37:25 3855
Quincy 13:31:35 -20.2 Dark Down 29.7 215.5 Low 13:25:44 - 13:37:25 3843
Portola 13:31:34 -19.8 Dark Down 29.6 216.0 Low 13:25:43 - 13:37:24 3810
Reno 13:31:31 -19.2 Dark Down 29.5 216.7 Low 13:25:40 - 13:37:21 3757
Carson City 13:31:32 -19.1 Dark Down 29.8 216.8 Low 13:25:42 - 13:37:23 3728
Gardnerville 13:31:31 -19.0 Dark Down 30.0 217.0 Low 13:25:41 - 13:37:22 3706
Yerington 13:31:29 -18.6 Dark Down 29.6 217.5 Low 13:25:39 - 13:37:20 3681
Hawthorne 13:31:28 -18.1 Dark Down 29.8 218.2 Low 13:25:38 - 13:37:19 3618
Lee Vining 13:31:30 -18.3 Dark Down 30.4 217.9 Up 13:25:39 - 13:37:20 3597
Bishop 13:31:29 -17.6 AT Down 30.6 218.9 Up 13:25:38 - 13:37:19 3512
Beatty 13:31:22 -16.2 AT Down 30.1 220.6 Up 13:25:31 - 13:37:12 3392
Wildwood 13:31:31 -16.8 AT Down 33.2 220.0 Up 13:25:41 - 13:37:22 3252
Laughlin/Bullhead City 13:31:16 -14.0 AT Down 30.2 223.3 Up 13:25:26 - 13:37:07 3136
Dunrhomin 13:30:45 -9.0 NT Down 21.4 229.6 Low 13:24:55 - 13:36:36 3133
Idyllwild 13:31:24 -15.2 AT Down 32.4 221.9 Up 13:25:34 - 13:37:15 3124
Patrick 13:31:13 -13.6 AT Down 29.6 223.8 Low 13:25:22 - 13:37:03 3122
Nikitin 13:30:45 -8.9 NT Down 21.5 229.7 Low 13:24:55 - 13:36:36 3117
CU-SBO 13:30:45 -9.0 NT Down 21.6 229.6 Low 13:24:55 - 13:36:36 3115
Lake Havasu City 13:31:15 -13.6 AT Down 30.6 223.8 Up 13:25:24 - 13:37:05 3066
Calipatria 13:31:21 -14.1 AT Down 32.2 223.3 Up 13:25:30 - 13:37:11 3010
Yuma 13:31:17 -13.3 AT Down 32.0 224.3 Up 13:25:27 - 13:37:08 2926
George/Scottsdale 13:31:07 -11.5 NT Down 29.7 226.3 Low 13:25:16 - 13:36:57 2874

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 281371, (2026/12/19 13:34UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 28.13 124
Alphard        09:27:35.2 -08:39:30  2.0  5.18 121
26 Hya         09:19:46.3 -11:58:29  4.1  1.38 119
PPM 221275     09:15:41.0 -13:07:53  7.6  0.17 119
281371         09:15:53.6 -12:58:19 15.9       119
Positions are for J2000

Event circumstances last updated at 2024/04/21 03:19:18 UT

Marc W. Buie, Southwest Research Institute

RECON