RECON: TNO occultation with 523718

Event between (523718) 14KZ101 and star GA0820:09070487 with event index number of 2330229

Geocentric closest approach at 2026/08/05 07:02:25 UTC

J2000 position of star is 18:22:40.0 -06:01:40
Equinox of date position of star is 18:23:51.7 -06:00:55
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 114 degrees from the moon. Moon is 59% illuminated.
TNO apparent brightness V=22.0

[RECON map]
TNO is 36.0 AU from the Sun and 35.3 AU from the Earth.
The TNO is moving 18.2 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 417 seconds.
The 1-sigma cross-track error in the shadow position is 4431 km.
The sky-plane scale is 25568.7 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=316.2 km assuming a 5% albedo -- 17.4 sec chord
Diameter=129.1 km assuming a 30% albedo -- 7.1 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 523718, (2026/08/05 07:02UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.5 -26:29:19  0.9 33.83 143
60Bet Oph      17:44:47.3 +04:33:29  2.8 14.42 120
PPM 201730     18:26:08.5 -07:03:35  6.5  1.16 114
PPM 201709     18:25:00.5 -06:14:07  8.4  0.32 114
PPM 201671     18:23:33.2 -06:00:39  9.5  0.13 114
523718         18:24:05.5 -06:00:46 15.6       113
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 2.2 sigma about the mid-time.
The median site spacing is 23.2 km RECON observability=1.0 and success probability=5.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:59:20 -20.7 Dark Up 30.0 206.3 Up 06:44:20 - 07:14:20 8454
Victoria 06:59:32 -22.1 Dark Up 32.8 203.4 Up 06:44:32 - 07:14:32 8387
Peachland 06:59:19 -21.7 Dark Up 30.7 207.2 Up 06:44:19 - 07:14:19 8373
Kelowna 06:59:18 -21.7 Dark Up 30.5 207.4 Up 06:44:18 - 07:14:18 8372
Summerland 06:59:19 -21.9 Dark Up 30.8 207.3 Up 06:44:19 - 07:14:19 8360
Penticton 06:59:18 -22.0 Dark Up 30.8 207.4 Up 06:44:18 - 07:14:18 8352
Oliver 06:59:18 -22.3 Dark Up 31.1 207.5 Up 06:44:18 - 07:14:18 8327
Anarchist Mountain Observatory 06:59:18 -22.5 Dark Up 31.2 207.8 Up 06:44:18 - 07:14:18 8309
Tonasket 06:59:18 -22.8 Dark Up 31.5 207.8 Up 06:44:18 - 07:14:18 8288
Okanogan 06:59:17 -23.1 Dark Up 31.9 207.7 Up 06:44:17 - 07:14:17 8268
Brewster 06:59:19 -23.3 Dark Up 32.2 207.6 Up 06:44:19 - 07:14:19 8254
Manson/Chelan 06:59:21 -23.4 Dark Up 32.5 207.3 Up 06:44:21 - 07:14:21 8249
Wenatchee 06:59:20 -23.9 Dark Up 32.9 207.2 Up 06:44:20 - 07:14:20 8219
Ellensburg 06:59:21 -24.2 Dark Up 33.4 207.1 Up 06:44:21 - 07:14:21 8195
Sleaford 06:58:37 -20.9 Dark Up 23.9 220.8 Low 06:43:37 - 07:13:37 8185
Yakima 06:59:20 -24.6 Dark Up 33.7 207.2 Up 06:44:20 - 07:14:20 8165
Toppenish/White Swan 06:59:21 -24.8 Dark Up 33.9 207.4 Up 06:44:21 - 07:14:21 8144
Goldendale 06:59:22 -25.3 Dark Up 34.5 207.1 Up 06:44:22 - 07:14:22 8115
The Dalles 06:59:21 -25.4 Dark Up 34.8 206.8 Up 06:44:21 - 07:14:21 8109
Maupin 06:59:21 -25.8 Dark Up 35.2 207.0 Up 06:44:21 - 07:14:21 8074
PNWRO 06:59:14 -25.5 Dark Up 33.7 209.2 Up 06:44:14 - 07:14:14 8073
Sisters 06:59:23 -26.5 Dark Up 36.1 206.8 Up 06:44:23 - 07:14:23 8022
Bend 06:59:21 -26.8 Dark Up 36.2 207.1 Up 06:44:21 - 07:14:21 7996
Oregon Observatory 06:59:25 -27.0 Dark Up 36.4 207.0 Up 06:44:25 - 07:14:25 7987
North Lake 06:59:23 -27.7 Dark Up 36.8 207.9 Up 06:44:23 - 07:14:23 7920
Chiloquin 06:59:26 -28.1 Dark Up 37.7 207.0 Up 06:44:26 - 07:14:26 7897
Klamath Falls 06:59:26 -28.4 Dark Up 38.0 207.2 Up 06:44:26 - 07:14:26 7867
Lakeview 06:59:18 -28.8 Dark Up 37.6 208.9 Up 06:44:18 - 07:14:18 7820
Cedarville 06:59:18 -29.5 Dark Up 38.1 209.3 Up 06:44:18 - 07:14:18 7761
Fall River/Burney 06:59:25 -29.6 Dark Up 38.9 208.1 Up 06:44:25 - 07:14:25 7761
Susanville 06:59:21 -30.4 Dark Up 39.2 209.2 Up 06:44:21 - 07:14:21 7686
Greenville 06:59:23 -30.6 Dark Up 39.6 209.0 Up 06:44:23 - 07:14:23 7673
Gimple 06:59:21 -30.6 Dark Up 39.5 209.1 Up 06:44:21 - 07:14:21 7670
Quincy 06:59:24 -30.8 Dark Up 39.7 209.1 Up 06:44:24 - 07:14:24 7656
Portola 06:59:20 -31.0 Dark Up 39.7 209.7 Up 06:44:20 - 07:14:20 7631
Reno 06:59:18 -31.4 Dark Up 39.6 210.6 Up 06:44:18 - 07:14:18 7588
Carson City 06:59:19 -31.8 Dark Up 39.9 210.7 Up 06:44:19 - 07:14:19 7557
Gardnerville 06:59:18 -32.0 Dark Up 40.1 210.9 Up 06:44:18 - 07:14:18 7535
Yerington 06:59:15 -32.1 Dark Up 39.9 211.6 Up 06:44:15 - 07:14:15 7520
Hawthorne 06:59:14 -32.7 Dark Up 40.0 212.4 Up 06:44:14 - 07:14:14 7463
Lee Vining 06:59:16 -33.1 Dark Up 40.7 212.1 Up 06:44:16 - 07:14:16 7432
Tonopah 06:59:09 -33.5 Dark Up 39.8 214.2 Up 06:44:09 - 07:14:09 7377
Bishop 06:59:14 -33.9 Dark Up 40.9 213.2 Up 06:44:14 - 07:14:14 7357
Beatty 06:59:07 -34.7 Dark Up 40.6 215.3 Up 06:44:07 - 07:14:07 7262
Indian Springs 06:59:03 -35.2 Dark Up 40.3 216.7 Up 06:44:03 - 07:14:03 7197
Dunrhomin 06:58:25 -32.8 Dark Up 32.2 225.9 Up 06:43:25 - 07:13:25 7187
CU-SBO 06:58:27 -33.0 Dark Up 32.5 225.9 Up 06:43:27 - 07:13:27 7168
Henderson 06:59:00 -35.9 Dark Up 40.4 217.8 Up 06:44:00 - 07:14:00 7127
Wildwood 06:59:15 -36.9 Dark Up 43.7 214.6 Up 06:44:15 - 07:14:15 7078
Laughlin/Bullhead City 06:59:00 -36.8 Dark Up 40.9 218.7 Up 06:44:00 - 07:14:00 7035
Patrick 06:58:56 -36.7 Dark Up 40.4 219.3 Up 06:43:56 - 07:13:56 7033
Kingman/Dolan Springs 06:58:56 -36.9 Dark Up 40.6 219.2 Up 06:43:56 - 07:13:56 7020
Mohave Valley 06:58:59 -37.1 Dark Up 41.1 218.8 Up 06:43:59 - 07:13:59 7010
Idyllwild 06:59:08 -37.7 Dark Up 43.1 217.1 Up 06:44:08 - 07:14:08 6981
Lake Havasu City 06:58:59 -37.5 Dark Up 41.3 219.3 Up 06:43:59 - 07:13:59 6966
Parker 06:58:58 -37.8 Dark Up 41.6 219.6 Up 06:43:58 - 07:13:58 6933
Calipatria 06:59:02 -38.6 Dark Up 43.0 218.8 Up 06:44:02 - 07:14:02 6884
Yuma 06:58:59 -39.2 Dark Up 42.9 220.0 Up 06:43:59 - 07:13:59 6813
George/Scottsdale 06:58:48 -38.7 Dark Up 40.6 222.5 Up 06:43:48 - 07:13:48 6811

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 523718, (2026/08/05 07:02UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 33.83 143
60Bet Oph      17:43:28.3 +04:34:06  2.8 14.42 120
PPM 201730     18:24:42.3 -07:04:34  6.5  1.16 114
PPM 201709     18:23:34.9 -06:15:04  8.4  0.32 114
PPM 201671     18:22:07.7 -06:01:32  9.5  0.13 114
523718         18:22:40.0 -06:01:40 15.6       114
Positions are for J2000

Event circumstances last updated at 2022/04/21 23:06:09 UT

Marc W. Buie, Southwest Research Institute

RECON