RECON: TNO occultation with 03TJ58

Event between 03TJ58 and star GA1120:02497763 with event index number of 1694849

Geocentric closest approach at 2026/02/27 05:35:05 UTC

J2000 position of star is 06:51:41.2 +23:47:35
Equinox of date position of star is 06:52:56.2 +23:46:01
Stellar brightness G=14.8, use SENSEUP=128
Star is 4 degrees from the moon. Moon is 79% illuminated.
TNO apparent brightness V=26.3

[RECON map]
TNO is 41.9 AU from the Sun and 41.4 AU from the Earth.
The TNO is moving 12.2 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 929 seconds.
The 1-sigma cross-track error in the shadow position is 2462 km.
The sky-plane scale is 30013.4 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=182.0 km assuming a 5% albedo -- 4.9 sec chord
Diameter=74.3 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03TJ58, (2026/02/27 05:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:55.0 +27:57:39  1.1 12.77   9
Alhena         06:39:13.4 +16:22:29  1.9  8.09  12
37 Gem         06:56:55.1 +25:20:26  6.3  1.78   3
PPM 096653     06:53:35.2 +23:34:06  6.9  0.20   4
03TJ58         06:53:16.6 +23:45:36 14.8         4
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 1.0 sigma about the mid-time.
The median site spacing is 22.9 km RECON observability=1.0 and success probability=20.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 05:33:37 -37.1 Dark Up 60.0 214.9 Up 05:18:37 - 05:48:37 906
Kelowna 05:33:37 -37.2 Dark Up 60.4 215.1 Up 05:18:37 - 05:48:37 867
Peachland 05:33:38 -37.1 Dark Up 60.6 214.7 Up 05:18:38 - 05:48:38 852
Summerland 05:33:37 -37.3 Dark Up 60.6 215.0 Up 05:18:37 - 05:48:37 839
Penticton 05:33:36 -37.4 Dark Up 60.7 215.2 Up 05:18:36 - 05:48:36 834
Oliver 05:33:36 -37.6 Dark Up 60.9 215.6 Up 05:18:36 - 05:48:36 800
Anarchist Mountain Observatory 05:33:34 -37.8 Dark Up 61.0 216.1 Up 05:18:34 - 05:48:34 786
Tonasket 05:33:34 -37.9 Dark Up 61.3 216.3 Up 05:18:34 - 05:48:34 755
Okanogan 05:33:33 -38.1 Dark Up 61.6 216.4 Up 05:18:33 - 05:48:33 720
Brewster 05:33:34 -38.1 Dark Up 61.9 216.4 Up 05:18:34 - 05:48:34 691
Victoria 05:33:55 -35.9 Dark Up 62.8 209.5 Up 05:18:55 - 05:48:55 688
Manson/Chelan 05:33:36 -38.0 Dark Up 62.2 215.9 Up 05:18:36 - 05:48:36 665
Entiat 05:33:35 -38.1 Dark Up 62.4 216.1 Up 05:18:35 - 05:48:35 643
Wenatchee 05:33:35 -38.2 Dark Up 62.7 216.2 Up 05:18:35 - 05:48:35 616
Ellensburg 05:33:36 -38.3 Dark Up 63.1 216.3 Up 05:18:36 - 05:48:36 572
Yakima 05:33:35 -38.6 Dark Up 63.4 216.7 Up 05:18:35 - 05:48:35 532
Pasco 05:33:26 -39.6 Dark Up 63.1 219.6 Up 05:18:26 - 05:48:26 517
Toppenish/White Swan 05:33:33 -38.8 Dark Up 63.5 217.3 Up 05:18:33 - 05:48:33 512
PNWRO 05:33:23 -39.8 Dark Up 63.2 220.3 Up 05:18:23 - 05:48:23 496
Goldendale 05:33:34 -38.9 Dark Up 64.2 217.2 Up 05:18:34 - 05:48:34 451
The Dalles 05:33:36 -38.8 Dark Up 64.5 216.8 Up 05:18:36 - 05:48:36 424
Maupin 05:33:35 -39.1 Dark Up 64.8 217.5 Up 05:18:35 - 05:48:35 383
Redmond 05:33:34 -39.5 Dark Up 65.5 218.5 Up 05:18:34 - 05:48:34 291
Sisters 05:33:36 -39.3 Dark Up 65.7 217.7 Up 05:18:36 - 05:48:36 288
Bend 05:33:34 -39.5 Dark Up 65.8 218.5 Up 05:18:34 - 05:48:34 267
Oregon Observatory 05:33:34 -39.6 Dark Up 66.0 218.5 Up 05:18:34 - 05:48:34 248
La Pine/Gilchrist 05:33:34 -39.6 Dark Up 66.2 218.7 Up 05:18:34 - 05:48:34 226
North Lake 05:33:29 -40.2 Dark Up 66.2 220.5 Up 05:18:29 - 05:48:29 190
Niwot 05:31:46 -51.0 Dark Up 58.6 248.4 Up 05:16:46 - 05:46:46 154
SwRI 05:31:46 -51.0 Dark Up 58.7 248.4 Up 05:16:46 - 05:46:46 141
Paisley 05:33:26 -40.7 Dark Up 66.5 222.0 Up 05:18:26 - 05:48:26 139
Lakeview 05:33:24 -41.1 Dark Up 66.7 223.1 Up 05:18:24 - 05:48:24 89
Klamath Falls 05:33:33 -40.2 Dark Up 67.4 220.3 Up 05:18:33 - 05:48:33 73
Cedarville 05:33:21 -41.6 Dark Up 67.1 224.5 Up 05:18:21 - 05:48:21 24
Fall River/Burney 05:33:28 -41.0 Dark Up 68.1 222.9 Up 05:18:28 - 05:48:28 -43
Susanville 05:33:22 -41.8 Dark Up 68.2 225.5 Up 05:18:22 - 05:48:22 -98
Gimple 05:33:23 -41.8 Dark Up 68.5 225.6 Up 05:18:23 - 05:48:23 -130
Greenville 05:33:23 -41.8 Dark Up 68.5 225.4 Up 05:18:23 - 05:48:23 -131
Quincy 05:33:23 -41.9 Dark Up 68.7 225.8 Up 05:18:23 - 05:48:23 -152
Portola 05:33:19 -42.2 Dark Up 68.5 226.9 Up 05:18:19 - 05:48:19 -158
Reno 05:33:15 -42.8 Dark Up 68.3 228.6 Up 05:18:15 - 05:48:15 -176
Carson City 05:33:13 -43.0 Dark Up 68.5 229.4 Up 05:18:13 - 05:48:13 -213
Yerington 05:33:09 -43.5 Dark Up 68.3 230.9 Up 05:18:09 - 05:48:09 -224
Gardnerville 05:33:13 -43.1 Dark Up 68.7 229.9 Up 05:18:13 - 05:48:13 -238
Hawthorne 05:33:05 -44.1 Dark Up 68.3 232.8 Up 05:18:05 - 05:48:05 -264
Tonopah 05:32:54 -45.2 Dark Up 67.7 236.1 Up 05:17:54 - 05:47:54 -290
Lee Vining 05:33:07 -44.0 Dark Up 68.9 233.0 Up 05:18:07 - 05:48:07 -331
Bishop 05:33:00 -44.8 Dark Up 68.8 235.6 Up 05:18:00 - 05:48:00 -382
Beatty 05:32:49 -46.1 Dark Up 68.0 239.2 Up 05:17:49 - 05:47:49 -404
Indian Springs 05:32:49 -47.1 Dark Up 67.4 241.6 Up 05:17:49 - 05:47:49 -431
Henderson 05:32:49 -47.8 Dark Up 67.2 243.8 Up 05:17:49 - 05:47:49 -495
Searchlight/Boulder City 05:32:49 -48.2 Dark Up 67.4 245.1 Up 05:17:49 - 05:47:49 -558
Patrick 05:32:49 -48.9 Dark Up 66.6 246.6 Up 05:17:49 - 05:47:49 -583
Laughlin/Bullhead City 05:32:49 -48.6 Dark Up 67.2 246.2 Up 05:17:49 - 05:47:49 -595
Kingman/Dolan Springs 05:32:49 -48.9 Dark Up 66.8 246.9 Up 05:17:49 - 05:47:49 -602
Mohave Valley 05:32:49 -48.7 Dark Up 67.3 246.8 Up 05:17:49 - 05:47:49 -625
DCO 05:32:49 -49.6 Dark Up 66.2 248.2 Up 05:17:49 - 05:47:49 -635
CPSLO 05:33:12 -44.2 Dark Up 71.5 236.2 Up 05:18:12 - 05:48:12 -636
George/Scottsdale 05:32:09 -51.1 Dark Up 65.8 252.5 Up 05:17:09 - 05:47:09 -646
Lake Havasu City 05:32:49 -49.1 Dark Up 67.3 248.0 Up 05:17:49 - 05:47:49 -672
Parker 05:32:49 -49.3 Dark Up 67.4 248.9 Up 05:17:49 - 05:47:49 -711
Wildwood 05:32:55 -46.2 Dark Up 70.7 242.8 Up 05:17:55 - 05:47:55 -732
Idyllwild 05:32:49 -47.8 Dark Up 69.4 246.5 Up 05:17:49 - 05:47:49 -743
Blythe 05:32:49 -49.4 Dark Up 67.8 249.7 Up 05:17:49 - 05:47:49 -764
Calipatria 05:32:49 -48.9 Dark Up 68.7 249.6 Up 05:17:49 - 05:47:49 -810
Yuma 05:32:49 -49.8 Dark Up 68.2 251.8 Up 05:17:49 - 05:47:49 -865

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 03TJ58, (2026/02/27 05:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 12.77   9
Alhena         06:37:42.8 +16:23:57  1.9  8.09  12
37 Gem         06:55:18.6 +25:22:33  6.3  1.78   3
PPM 096653     06:51:59.9 +23:36:06  6.9  0.20   4
03TJ58         06:51:41.2 +23:47:35 14.8         4
Positions are for J2000

Event circumstances last updated at 2020/07/22 22:04:48 UT

Marc W. Buie, Southwest Research Institute

RECON