RECON: TNO occultation with 555915

Event between (555915) 14GX53 and star GA0800:04872949 with event index number of 2476657

Geocentric closest approach at 2026/04/23 07:32:11 UTC

J2000 position of star is 15:45:29.6 -09:36:02
Equinox of date position of star is 15:46:42.7 -09:40:09
Stellar brightness G=13.8, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 122 degrees from the moon. Moon is 41% illuminated.
TNO apparent brightness V=20.9

[RECON map]
TNO is 35.1 AU from the Sun and 34.2 AU from the Earth.
The TNO is moving 21.8 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 85 seconds.
The 1-sigma cross-track error in the shadow position is 1474 km.
The sky-plane scale is 24789.6 km/arcsec.

The TNO has an absolute magnitude Hv=5.4
Diameter=494.3 km assuming a 5% albedo -- 22.9 sec chord
Diameter=201.8 km assuming a 30% albedo -- 9.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 555915, (2026/04/23 07:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.5 -26:29:17  0.9 19.78 137
27Bet Lib      15:18:25.6 -09:28:42  2.6  7.03 115
PPM 198725     15:35:52.0 -09:16:13  5.6  2.76 119
PPM 198930     15:47:14.0 -09:47:09  8.4  0.13 122
555915         15:46:55.5 -09:40:52 13.8       122
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 19.5 km RECON observability=1.0 and success probability=30.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:34:14 -25.0 Dark Up 26.5 160.8 Low 07:26:41 - 07:41:46 1004
Kamloops 07:34:54 -26.5 Dark Up 23.8 145.6 Low 07:27:22 - 07:42:27 604
Kelowna 07:34:53 -27.4 Dark Up 24.8 146.3 Low 07:27:20 - 07:42:25 569
Peachland 07:34:53 -27.5 Dark Up 24.7 145.9 Low 07:27:21 - 07:42:26 555
Summerland 07:34:54 -27.6 Dark Up 24.9 146.0 Low 07:27:21 - 07:42:26 547
Penticton 07:34:54 -27.7 Dark Up 25.0 146.1 Low 07:27:21 - 07:42:26 545
Oliver 07:34:54 -28.1 Dark Up 25.3 146.0 Low 07:27:21 - 07:42:26 521
Anarchist Mountain Observatory 07:34:54 -28.2 Dark Up 25.5 146.2 Low 07:27:21 - 07:42:26 514
Tonasket 07:34:54 -28.6 Dark Up 25.7 146.0 Low 07:27:22 - 07:42:27 490
Okanogan 07:34:55 -28.9 Dark Up 26.0 145.8 Low 07:27:23 - 07:42:28 463
Brewster 07:34:56 -29.1 Dark Up 26.1 145.5 Low 07:27:23 - 07:42:28 439
Manson/Chelan 07:34:57 -29.3 Dark Up 26.1 145.1 Low 07:27:24 - 07:42:29 416
Victoria 07:35:05 -28.4 Dark Up 24.3 142.0 Low 07:27:32 - 07:42:37 386
Wenatchee 07:34:58 -29.8 Dark Up 26.5 144.8 Low 07:27:25 - 07:42:30 378
Ellensburg 07:34:59 -30.2 Dark Up 26.7 144.4 Low 07:27:27 - 07:42:32 343
Yakima 07:35:00 -30.6 Dark Up 27.0 144.3 Low 07:27:27 - 07:42:32 313
PNWRO 07:34:55 -31.3 Dark Up 28.2 145.8 Low 07:27:23 - 07:42:28 311
Toppenish/White Swan 07:35:00 -30.8 Dark Up 27.3 144.4 Low 07:27:27 - 07:42:32 301
Goldendale 07:35:01 -31.3 Dark Up 27.6 143.8 Low 07:27:29 - 07:42:34 251
Dunrhomin 07:34:15 -36.5 Dark Up 37.8 159.1 Up 07:26:42 - 07:41:47 230
The Dalles 07:35:03 -31.5 Dark Up 27.6 143.4 Low 07:27:30 - 07:42:35 225
CU-SBO 07:34:15 -36.8 Dark Up 38.0 158.9 Up 07:26:43 - 07:41:48 209
Maupin 07:35:03 -31.9 Dark Up 28.0 143.3 Low 07:27:30 - 07:42:35 196
Sisters 07:35:05 -32.7 Dark Up 28.5 142.6 Low 07:27:32 - 07:42:37 118
Bend 07:35:04 -33.0 Dark Up 28.8 142.8 Low 07:27:32 - 07:42:37 106
Oregon Observatory 07:35:05 -33.2 Dark Up 28.8 142.6 Low 07:27:33 - 07:42:38 90
North Lake 07:35:04 -33.8 Dark Up 29.6 142.9 Low 07:27:32 - 07:42:37 54
Lakeview 07:35:03 -35.0 Dark Up 30.7 143.1 Up 07:27:31 - 07:42:36 -14
Chiloquin 07:35:07 -34.4 Dark Up 29.7 141.7 Low 07:27:35 - 07:42:40 -23
Klamath Falls 07:35:08 -34.8 Dark Up 30.0 141.7 Up 07:27:35 - 07:42:40 -48
Cedarville 07:35:03 -35.6 Dark Up 31.3 143.0 Up 07:27:31 - 07:42:36 -62
Fall River/Burney 07:35:08 -36.0 Dark Up 31.1 141.6 Up 07:27:35 - 07:42:40 -132
Susanville 07:35:06 -36.7 Dark Up 32.0 142.1 Up 07:27:33 - 07:42:38 -163
Gimple 07:35:07 -36.9 Dark Up 32.1 141.8 Up 07:27:34 - 07:42:39 -192
Greenville 07:35:07 -36.9 Dark Up 32.0 141.7 Up 07:27:34 - 07:42:39 -194
Portola 07:35:06 -37.3 Dark Up 32.5 142.1 Up 07:27:33 - 07:42:38 -207
Quincy 07:35:07 -37.1 Dark Up 32.2 141.6 Up 07:27:35 - 07:42:40 -210
Reno 07:35:04 -37.6 Dark Up 33.0 142.6 Up 07:27:31 - 07:42:36 -212
Yerington 07:35:02 -38.2 Dark Up 33.8 143.1 Up 07:27:30 - 07:42:35 -239
Carson City 07:35:04 -38.0 Dark Up 33.3 142.5 Up 07:27:32 - 07:42:37 -240
Gardnerville 07:35:04 -38.2 Dark Up 33.5 142.5 Up 07:27:32 - 07:42:37 -259
Tonopah 07:34:56 -39.3 Dark Up 35.4 144.8 Up 07:27:24 - 07:42:29 -262
Hawthorne 07:35:01 -38.7 Dark Up 34.4 143.5 Up 07:27:28 - 07:42:33 -263
Lee Vining 07:35:03 -39.3 Dark Up 34.6 142.7 Up 07:27:30 - 07:42:35 -322
Indian Springs 07:34:52 -40.8 Dark Up 37.3 145.8 Up 07:27:19 - 07:42:24 -343
Beatty 07:34:55 -40.5 Dark Up 36.6 144.8 Up 07:27:23 - 07:42:28 -346
Bishop 07:35:01 -39.9 Dark Up 35.4 143.2 Up 07:27:28 - 07:42:33 -353
Henderson 07:34:50 -41.4 Dark Up 38.1 146.3 Up 07:27:17 - 07:42:22 -369
Patrick 07:34:46 -42.0 Dark Up 39.1 147.3 Up 07:27:14 - 07:42:19 -390
Kingman/Dolan Springs 07:34:47 -42.2 Dark Up 39.2 147.0 Up 07:27:14 - 07:42:19 -414
Laughlin/Bullhead City 07:34:48 -42.3 Dark Up 39.0 146.4 Up 07:27:16 - 07:42:21 -431
Mohave Valley 07:34:49 -42.5 Dark Up 39.2 146.3 Up 07:27:16 - 07:42:21 -454
George/Scottsdale 07:34:39 -43.7 Dark Up 41.4 148.8 Up 07:27:07 - 07:42:12 -476
Lake Havasu City 07:34:48 -42.9 Dark Up 39.7 146.4 Up 07:27:15 - 07:42:20 -481
Parker 07:34:48 -43.3 Dark Up 40.0 146.2 Up 07:27:15 - 07:42:20 -510
Idyllwild 07:34:57 -43.6 Dark Up 39.2 143.4 Up 07:27:24 - 07:42:29 -613
Calipatria 07:34:52 -44.3 Dark Up 40.2 144.4 Up 07:27:20 - 07:42:25 -633
Wildwood 07:35:03 -43.1 Dark Up 37.9 141.5 Up 07:27:31 - 07:42:36 -637
Yuma 07:34:49 -44.7 Dark Up 41.0 145.2 Up 07:27:17 - 07:42:22 -645

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 555915, (2026/04/23 07:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 19.78 137
27Bet Lib      15:17:00.3 -09:22:59  2.6  7.03 115
PPM 198725     15:34:26.4 -09:11:01  5.6  2.76 119
PPM 198930     15:45:48.1 -09:42:19  8.4  0.13 122
555915         15:45:29.6 -09:36:02 13.8       122
Positions are for J2000

Event circumstances last updated at 2022/05/15 23:04:12 UT

Marc W. Buie, Southwest Research Institute

RECON