RECON: TNO occultation with 307251

Event between (307251) 02KW14 and star GA0620:21659326 with event index number of 2296905

Geocentric closest approach at 2026/04/13 12:09:35 UTC

J2000 position of star is 17:42:29.9 -27:35:55
Equinox of date position of star is 17:44:02.2 -27:36:31
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 66 degrees from the moon. Moon is 19% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 43.6 AU from the Sun and 43.2 AU from the Earth.
Apparent velocity is 9.0 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 2193 seconds.
The 1-sigma cross-track error in the shadow position is 4604 km.
The sky-plane scale is 31310.7 km/arcsec.

The object has an absolute magnitude Hv=5.5
Diameter=457.1 km assuming a 5% albedo -- 52.9 sec chord
Diameter=186.6 km assuming a 30% albedo -- 21.6 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 307251, (2026/04/13 12:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.4 -26:29:17  0.9 16.31  82
34Ups Sco      17:32:33.2 -37:18:51  2.7 10.01  68
3 Sgr          17:49:13.0 -27:50:18  4.2  1.14  65
PPM 267186     17:44:57.1 -27:53:39  6.7  0.34  65
PPM 267175     17:44:29.3 -27:51:16  8.9  0.26  66
307251         17:44:09.1 -27:36:33 16.9        65
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 0.4 sigma about the mid-time.
The median site spacing is 43.7 km RECON observability=0.2 and success probability=2.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 12:07:22 -13.0 AT Up 13.7 175.0 Really Low 11:52:22 - 12:22:22 3420
Kamloops 12:06:54 -10.3 NT Up 11.7 177.7 Really Low 11:51:54 - 12:21:54 3418
Peachland 12:06:51 -10.4 NT Up 12.6 178.2 Really Low 11:51:51 - 12:21:51 3388
Kelowna 12:06:48 -10.1 NT Up 12.5 178.5 Really Low 11:51:48 - 12:21:48 3385
Summerland 12:06:50 -10.4 NT Up 12.8 178.3 Really Low 11:51:50 - 12:21:50 3383
Penticton 12:06:50 -10.3 NT Up 12.9 178.4 Really Low 11:51:50 - 12:21:50 3379
Oliver 12:06:49 -10.5 NT Up 13.2 178.4 Really Low 11:51:49 - 12:21:49 3371
Anarchist Mountain Observatory 12:06:49 -10.5 NT Up 13.4 178.6 Really Low 11:51:49 - 12:21:49 3364
Okanogan 12:06:51 -10.9 NT Up 14.0 178.4 Really Low 11:51:51 - 12:21:51 3352
Manson/Chelan 12:06:56 -11.4 NT Up 14.5 177.8 Really Low 11:51:56 - 12:21:56 3350
Brewster 12:06:53 -11.1 NT Up 14.3 178.2 Really Low 11:51:53 - 12:21:53 3348
Wenatchee 12:06:58 -11.8 NT Up 15.0 177.7 Really Low 11:51:58 - 12:21:58 3340
Ellensburg 12:07:00 -12.1 AT Up 15.4 177.5 Really Low 11:52:00 - 12:22:00 3333
Yakima 12:07:02 -12.3 AT Up 15.8 177.5 Really Low 11:52:02 - 12:22:02 3322
Toppenish/White Swan 12:06:59 -12.3 AT Up 16.0 177.6 Really Low 11:51:59 - 12:21:59 3313
The Dalles 12:07:08 -13.1 AT Up 16.7 176.9 Really Low 11:52:08 - 12:22:08 3304
Maupin 12:07:08 -13.2 AT Up 17.2 177.0 Really Low 11:52:08 - 12:22:08 3290
PNWRO 12:06:48 -11.6 NT Up 16.4 179.0 Really Low 11:51:48 - 12:21:48 3274
Sisters 12:07:11 -14.0 AT Up 18.0 176.5 Really Low 11:52:11 - 12:22:11 3272
Bend 12:07:11 -13.9 AT Up 18.3 176.8 Really Low 11:52:11 - 12:22:11 3260
Oregon Observatory 12:07:11 -14.1 AT Up 18.4 176.7 Really Low 11:52:11 - 12:22:11 3257
Chiloquin 12:07:17 -14.9 AT Up 19.7 176.3 Really Low 11:52:17 - 12:22:17 3220
Klamath Falls 12:07:18 -15.0 AT Up 20.1 176.3 Low 11:52:18 - 12:22:18 3206
Sleaford 12:05:12 -1.7 CT Up 9.7 190.3 Really Low 11:50:12 - 12:20:12 3159
Fall River/Burney 12:07:16 -15.3 AT Up 21.3 176.7 Low 11:52:16 - 12:22:16 3155
Cedarville 12:07:05 -14.3 AT Up 20.8 177.8 Low 11:52:05 - 12:22:05 3150
Greenville 12:07:15 -15.4 AT Up 22.2 177.1 Low 11:52:15 - 12:22:15 3112
Gimple 12:07:14 -15.4 AT Up 22.2 177.1 Low 11:52:14 - 12:22:14 3110
Quincy 12:07:15 -15.5 AT Up 22.4 177.1 Low 11:52:15 - 12:22:15 3103
Portola 12:07:10 -15.3 AT Up 22.5 177.5 Low 11:52:10 - 12:22:10 3089
Reno 12:07:05 -15.0 AT Up 22.8 178.1 Low 11:52:05 - 12:22:05 3065
Carson City 12:07:05 -15.1 AT Up 23.2 178.1 Low 11:52:05 - 12:22:05 3050
Gardnerville 12:07:06 -15.2 AT Up 23.4 178.2 Low 11:52:06 - 12:22:06 3039
Yerington 12:07:00 -14.8 AT Up 23.4 178.7 Low 11:52:00 - 12:22:00 3028
Hawthorne 12:06:55 -14.6 AT Up 23.9 179.2 Low 11:51:55 - 12:21:55 2997
Lee Vining 12:07:01 -15.2 AT Up 24.4 178.7 Low 11:52:01 - 12:22:01 2984
Bishop 12:06:56 -14.9 AT Up 25.0 179.4 Low 11:51:56 - 12:21:56 2941
Beatty 12:06:42 -13.9 AT Up 25.5 181.0 Low 11:51:42 - 12:21:42 2882
Wildwood 12:07:02 -16.4 AT Up 28.3 179.2 Low 11:52:02 - 12:22:02 2789
Laughlin/Bullhead City 12:06:23 -13.0 AT Up 27.2 183.1 Low 11:51:23 - 12:21:23 2745
Patrick 12:06:17 -12.4 AT Up 26.9 183.8 Low 11:51:17 - 12:21:17 2739
Dunrhomin 12:04:59 -4.6 CT Up 21.2 191.5 Low 11:49:59 - 12:19:59 2729
Idyllwild 12:06:46 -15.1 AT Up 28.7 181.1 Low 11:51:46 - 12:21:46 2726
Nikitin 12:04:57 -4.7 CT Up 21.4 191.5 Low 11:49:57 - 12:19:57 2722
CU-SBO 12:04:58 -4.7 CT Up 21.5 191.5 Low 11:49:58 - 12:19:58 2721
Lake Havasu City 12:06:22 -13.1 AT Up 27.8 183.4 Low 11:51:22 - 12:21:22 2704
Calipatria 12:06:35 -14.4 AT Up 29.2 182.2 Low 11:51:35 - 12:21:35 2664
Yuma 12:06:27 -13.9 AT Up 29.6 183.1 Low 11:51:27 - 12:21:27 2618
George/Scottsdale 12:05:59 -11.5 NT Up 28.4 185.8 Low 11:50:59 - 12:20:59 2598

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 307251, (2026/04/13 12:10UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.31  82
34Ups Sco      17:30:45.8 -37:17:46  2.7 10.01  68
3 Sgr          17:47:33.6 -27:49:51  4.2  1.14  65
PPM 267186     17:43:17.7 -27:53:02  6.7  0.34  65
PPM 267175     17:42:50.0 -27:50:38  8.9  0.26  66
307251         17:42:29.9 -27:35:55 16.9        66
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:26:12 UT

Marc W. Buie, Southwest Research Institute

RECON