RECON: TNO occultation with 03TL58

Event between 03TL58 and star GA1080:02441603 with event index number of 2006022

Geocentric closest approach at 2026/01/28 08:47:22 UTC

J2000 position of star is 06:50:42.8 +19:15:34
Equinox of date position of star is 06:52:07.1 +19:13:47
Stellar brightness G=15.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 36 degrees from the moon. Moon is 74% illuminated.
Apparent brightness V=23.1

[RECON map]
Object is 41.7 AU from the Sun and 40.8 AU from the Earth.
Apparent velocity is 22.5 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 1051 seconds.
The 1-sigma cross-track error in the shadow position is 5209 km.
The sky-plane scale is 29581.9 km/arcsec.

The object has an absolute magnitude Hv=6.9
Diameter=246.6 km assuming a 5% albedo -- 10.9 sec chord
Diameter=100.7 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03TL58, (2026/01/28 08:47UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.7 +27:57:40  1.1 15.25  46
Alhena         06:39:13.1 +16:22:29  1.9  4.21  34
PPM 123009     06:47:52.9 +18:48:29  6.5  1.11  35
PPM 123131     06:52:05.2 +19:15:57  8.1  0.05  36
03TL58         06:52:14.9 +19:13:37 15.1        36
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 25.6 km RECON observability=1.0 and success probability=4.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:45:27 -51.8 Dark Up 39.1 249.5 Up 08:30:27 - 09:00:27 9905
Kamloops 08:45:53 -56.9 Dark Up 47.6 235.5 Up 08:30:53 - 09:00:53 9496
Kelowna 08:45:49 -57.5 Dark Up 47.6 237.3 Up 08:30:49 - 09:00:49 9445
Peachland 08:45:50 -57.7 Dark Up 47.8 237.1 Up 08:30:50 - 09:00:50 9430
Summerland 08:45:49 -57.8 Dark Up 47.9 237.3 Up 08:30:49 - 09:00:49 9419
Penticton 08:45:49 -57.9 Dark Up 47.8 237.5 Up 08:30:49 - 09:00:49 9416
Oliver 08:45:48 -58.2 Dark Up 48.0 237.8 Up 08:30:48 - 09:00:48 9385
Anarchist Mountain Observatory 08:45:47 -58.3 Dark Up 48.0 238.2 Up 08:30:47 - 09:00:47 9375
Okanogan 08:45:45 -59.0 Dark Up 48.5 238.6 Up 08:30:45 - 09:00:45 9315
Brewster 08:45:46 -59.3 Dark Up 48.7 238.6 Up 08:30:46 - 09:00:46 9287
Manson/Chelan 08:45:46 -59.6 Dark Up 49.1 238.4 Up 08:30:46 - 09:00:46 9261
Victoria 08:45:56 -59.4 Dark Up 50.5 233.9 Up 08:30:56 - 09:00:56 9252
Wenatchee 08:45:44 -60.0 Dark Up 49.4 238.6 Up 08:30:44 - 09:00:44 9216
Ellensburg 08:45:45 -60.5 Dark Up 49.7 238.8 Up 08:30:45 - 09:00:45 9175
Yakima 08:45:44 -60.9 Dark Up 50.0 239.2 Up 08:30:44 - 09:00:44 9139
Toppenish/White Swan 08:45:42 -61.1 Dark Up 50.0 239.6 Up 08:30:42 - 09:00:42 9123
PNWRO 08:45:37 -61.1 Dark Up 49.3 241.6 Up 08:30:37 - 09:00:37 9122
The Dalles 08:45:42 -61.9 Dark Up 50.8 239.5 Up 08:30:42 - 09:00:42 9037
Maupin 08:45:41 -62.3 Dark Up 51.0 240.1 Up 08:30:41 - 09:00:41 9002
Dunrhomin 08:44:47 -60.4 Dark Up 41.8 259.8 Up 08:29:47 - 08:59:47 8943
Nikitin 08:44:48 -60.6 Dark Up 41.9 259.9 Up 08:29:48 - 08:59:48 8926
CU-SBO 08:44:48 -60.7 Dark Up 41.9 259.9 Up 08:29:48 - 08:59:48 8918
Sisters 08:45:40 -63.3 Dark Up 51.7 240.5 Up 08:30:40 - 09:00:40 8911
Bend 08:45:40 -63.5 Dark Up 51.7 241.0 Up 08:30:40 - 09:00:40 8895
Oregon Observatory 08:45:39 -63.7 Dark Up 51.9 241.1 Up 08:30:39 - 09:00:39 8877
Chiloquin 08:45:37 -65.0 Dark Up 52.8 242.1 Up 08:30:37 - 09:00:37 8746
Klamath Falls 08:45:37 -65.3 Dark Up 52.9 242.6 Up 08:30:37 - 09:00:37 8716
Cedarville 08:45:30 -65.7 Dark Up 52.1 245.1 Up 08:30:30 - 09:00:30 8686
Fall River/Burney 08:45:33 -66.4 Dark Up 53.2 244.4 Up 08:30:33 - 09:00:33 8613
Gimple 08:45:29 -67.1 Dark Up 53.2 246.0 Up 08:30:29 - 09:00:29 8539
Greenville 08:45:29 -67.2 Dark Up 53.2 245.9 Up 08:30:29 - 09:00:29 8538
Quincy 08:45:29 -67.3 Dark Up 53.3 246.2 Up 08:30:29 - 09:00:29 8518
Portola 08:45:28 -67.4 Dark Up 53.0 246.8 Up 08:30:28 - 09:00:28 8518
Reno 08:45:24 -67.4 Dark Up 52.7 247.8 Up 08:30:24 - 09:00:24 8507
Carson City 08:45:24 -67.8 Dark Up 52.8 248.3 Up 08:30:24 - 09:00:24 8474
Yerington 08:45:21 -67.8 Dark Up 52.4 249.1 Up 08:30:21 - 09:00:21 8470
Gardnerville 08:45:24 -68.0 Dark Up 52.9 248.6 Up 08:30:24 - 09:00:24 8452
Hawthorne 08:45:18 -68.0 Dark Up 52.2 250.2 Up 08:30:18 - 09:00:18 8439
Lee Vining 08:45:20 -68.7 Dark Up 52.8 250.4 Up 08:30:20 - 09:00:20 8373
Bishop 08:45:16 -69.0 Dark Up 52.4 251.8 Up 08:30:16 - 09:00:16 8333
Beatty 08:45:09 -68.8 Dark Up 51.3 253.9 Up 08:30:09 - 09:00:09 8329
Patrick 08:44:57 -68.7 Dark Up 49.5 258.0 Up 08:29:57 - 08:59:57 8260
Laughlin/Bullhead City 08:44:59 -69.2 Dark Up 50.1 257.7 Up 08:29:59 - 08:59:59 8217
Lake Havasu City 08:44:57 -69.6 Dark Up 50.0 258.7 Up 08:29:57 - 08:59:57 8158
George/Scottsdale 08:44:48 -68.8 Dark Up 48.2 261.3 Up 08:29:48 - 08:59:48 8150
Idyllwild 08:45:02 -71.4 Dark Up 52.1 257.8 Up 08:30:02 - 09:00:02 8021
Wildwood 08:45:09 -72.0 Dark Up 53.5 255.8 Up 08:30:09 - 09:00:09 8008
Calipatria 08:44:57 -71.3 Dark Up 51.3 259.4 Up 08:29:57 - 08:59:57 7992
Yuma 08:44:54 -71.1 Dark Up 50.6 260.6 Up 08:29:54 - 08:59:54 7973

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 03TL58, (2026/01/28 08:47UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 15.25  46
Alhena         06:37:42.8 +16:23:57  1.9  4.21  34
PPM 123009     06:46:21.1 +18:50:16  6.5  1.11  35
PPM 123131     06:50:33.1 +19:17:53  8.1  0.05  36
03TL58         06:50:42.8 +19:15:34 15.1        36
Positions are for J2000

Event circumstances last updated at 2023/11/16 03:53:45 UT

Marc W. Buie, Southwest Research Institute

RECON