RECON: TNO occultation with 135024

Event between (135024) 01KO76 and star GA0660:07352898 with event index number of 1486766

Geocentric closest approach at 2025/08/04 06:08:24 UTC

J2000 position of star is 16:23:52.0 -22:31:47
Equinox of date position of star is 16:25:19.6 -22:35:05
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 6 degrees from the moon. Moon is 75% illuminated.
Apparent brightness V=23.5

[RECON map]
Object is 43.4 AU from the Sun and 42.9 AU from the Earth.
Apparent velocity is 8.2 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 963 seconds.
The 1-sigma cross-track error in the shadow position is 5285 km.
The sky-plane scale is 31132.1 km/arcsec.

The object has an absolute magnitude Hv=7.0
Diameter=251.2 km assuming a 5% albedo -- 29.3 sec chord
Diameter=102.6 km assuming a 30% albedo -- 12.0 sec chord
Dynamical classification is 7:4EEE
 
 
 
 
 
 

Star training set for 135024, (2025/08/04 06:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:58.8 -26:29:11  0.9  4.10   2
8Bet1Sco       16:06:55.8 -19:52:24  2.6  5.09  11
19Omi Sco      16:22:10.9 -24:13:44  4.0  1.80   5
PPM 265483     16:25:23.9 -22:25:35  8.4  0.16   6
135024         16:25:23.7 -22:35:15 16.0         6
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 0.9 sigma about the mid-time.
The median site spacing is 35.9 km RECON observability=0.1 and success probability=0.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:05:44 -17.1 AT Up 9.4 215.4 Really Low 05:50:44 - 06:20:44 534
Kelowna 06:05:32 -18.1 Dark Up 9.8 216.2 Really Low 05:50:32 - 06:20:32 505
Peachland 06:05:33 -18.1 Dark Up 10.0 215.9 Really Low 05:50:33 - 06:20:33 504
Summerland 06:05:32 -18.2 Dark Up 10.1 216.0 Really Low 05:50:32 - 06:20:32 499
Penticton 06:05:31 -18.3 Dark Up 10.1 216.1 Really Low 05:50:31 - 06:20:31 496
Oliver 06:05:28 -18.6 Dark Up 10.4 216.1 Really Low 05:50:28 - 06:20:28 485
Victoria 06:05:51 -17.9 AT Up 12.3 213.0 Really Low 05:50:51 - 06:20:51 484
Anarchist Mountain Observatory 06:05:25 -18.8 Dark Up 10.4 216.3 Really Low 05:50:25 - 06:20:25 480
Okanogan 06:05:23 -19.3 Dark Up 11.0 216.2 Really Low 05:50:23 - 06:20:23 460
Brewster 06:05:22 -19.5 Dark Up 11.3 216.0 Really Low 05:50:22 - 06:20:22 452
Manson/Chelan 06:05:23 -19.5 Dark Up 11.7 215.8 Really Low 05:50:23 - 06:20:23 447
Sleaford 06:04:26 -19.3 Dark Down 2.6 227.0 Really Low 05:49:26 - 06:19:26 446
Wenatchee 06:05:21 -19.9 Dark Up 12.1 215.7 Really Low 05:50:21 - 06:20:21 432
Ellensburg 06:05:20 -20.1 Dark Up 12.5 215.5 Really Low 05:50:20 - 06:20:20 420
Yakima 06:05:18 -20.5 Dark Up 12.9 215.6 Really Low 05:50:18 - 06:20:18 405
Toppenish/White Swan 06:05:15 -20.7 Dark Up 13.0 215.7 Really Low 05:50:15 - 06:20:15 397
PNWRO 06:05:01 -21.5 Dark Up 12.7 217.0 Really Low 05:50:01 - 06:20:01 374
The Dalles 06:05:16 -21.1 Dark Up 13.9 215.2 Really Low 05:50:16 - 06:20:16 372
Maupin 06:05:11 -21.5 Dark Up 14.2 215.3 Really Low 05:50:11 - 06:20:11 356
Sisters 06:05:10 -22.0 Dark Up 15.2 215.0 Really Low 05:50:10 - 06:20:10 326
Bend 06:05:07 -22.3 Dark Up 15.3 215.2 Really Low 05:50:07 - 06:20:07 315
Oregon Observatory 06:05:06 -22.4 Dark Up 15.5 215.2 Really Low 05:50:06 - 06:20:06 309
Chiloquin 06:05:01 -23.3 Dark Up 16.7 215.0 Really Low 05:50:01 - 06:20:01 256
Klamath Falls 06:04:58 -23.7 Dark Up 17.0 215.1 Really Low 05:49:58 - 06:19:58 241
Cedarville 06:04:41 -24.9 Dark Up 16.9 216.5 Really Low 05:49:41 - 06:19:41 201
Fall River/Burney 06:04:48 -24.8 Dark Up 17.8 215.6 Really Low 05:49:48 - 06:19:48 187
Greenville 06:04:38 -25.7 Dark Up 18.3 216.1 Really Low 05:49:38 - 06:19:38 142
Gimple 06:04:38 -25.7 Dark Up 18.3 216.2 Really Low 05:49:38 - 06:19:38 142
Quincy 06:04:37 -25.9 Dark Up 18.5 216.2 Really Low 05:49:37 - 06:19:37 133
Portola 06:04:33 -26.2 Dark Up 18.4 216.6 Really Low 05:49:33 - 06:19:33 124
Reno 06:04:26 -26.7 Dark Up 18.3 217.2 Really Low 05:49:26 - 06:19:26 107
Carson City 06:04:23 -27.0 Dark Up 18.6 217.3 Really Low 05:49:23 - 06:19:23 90
Gardnerville 06:04:21 -27.2 Dark Up 18.8 217.3 Really Low 05:49:21 - 06:19:21 77
Yerington 06:04:16 -27.4 Dark Up 18.5 217.8 Really Low 05:49:16 - 06:19:16 76
Hawthorne 06:04:09 -28.0 Dark Up 18.6 218.3 Really Low 05:49:09 - 06:19:09 49
Lee Vining 06:04:10 -28.3 Dark Up 19.3 218.0 Really Low 05:49:10 - 06:19:10 24
Bishop 06:04:00 -29.1 Dark Up 19.4 218.7 Really Low 05:49:00 - 06:19:00 -12
Dunrhomin 06:02:41 -30.7 Dark Up 10.4 228.3 Really Low 05:47:41 - 06:17:41 -18
Nikitin 06:02:39 -30.9 Dark Up 10.5 228.3 Really Low 05:47:39 - 06:17:39 -27
CU-SBO 06:02:39 -30.9 Dark Up 10.6 228.2 Really Low 05:47:39 - 06:17:39 -29
Beatty 06:03:43 -30.1 Dark Up 19.0 220.1 Really Low 05:48:43 - 06:18:43 -50
Patrick 06:03:10 -32.5 Dark Up 18.6 222.6 Really Low 05:48:10 - 06:18:10 -159
Laughlin/Bullhead City 06:03:13 -32.4 Dark Up 19.2 222.1 Really Low 05:48:13 - 06:18:13 -166
Wildwood 06:03:41 -31.7 Dark Up 22.1 219.3 Low 05:48:41 - 06:18:41 -190
Lake Havasu City 06:03:07 -33.1 Dark Up 19.6 222.5 Really Low 05:48:07 - 06:18:07 -207
Idyllwild 06:03:23 -32.8 Dark Up 21.4 220.8 Low 05:48:23 - 06:18:23 -226
Calipatria 06:03:09 -33.8 Dark Up 21.2 221.9 Low 05:48:09 - 06:18:09 -274
George/Scottsdale 06:02:41 -34.7 Dark Up 18.8 224.5 Really Low 05:47:41 - 06:17:41 -279
Yuma 06:02:58 -34.5 Dark Up 21.1 222.7 Low 05:47:58 - 06:17:58 -309

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 135024, (2025/08/04 06:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  4.10   2
8Bet1Sco       16:05:26.2 -19:48:20  2.6  5.09  11
19Omi Sco      16:20:38.2 -24:10:10  4.0  1.80   5
PPM 265483     16:23:52.3 -22:22:08  8.4  0.16   6
135024         16:23:52.0 -22:31:47 16.0         6
Positions are for J2000

Event circumstances last updated at 2024/06/09 02:46:11 UT

Marc W. Buie, Southwest Research Institute

RECON