RECON: TNO occultation with 98WY24

Event between 98WY24 and star GA1100:02877143 with event index number of 1489734

Geocentric closest approach at 2026/01/03 04:14:10 UTC

J2000 position of star is 07:38:47.0 +21:50:33
Equinox of date position of star is 07:40:05.4 +21:47:27
Stellar brightness G=13.6, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 14 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=23.0

[RECON map]
TNO is 41.5 AU from the Sun and 40.5 AU from the Earth.
The TNO is moving 25.0 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 206 seconds.
The 1-sigma cross-track error in the shadow position is 1771 km.
The sky-plane scale is 29379.2 km/arcsec.

The TNO has an absolute magnitude Hv=6.8
Diameter=266.7 km assuming a 5% albedo -- 10.6 sec chord
Diameter=108.9 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 98WY24, (2026/01/03 04:31UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.4 +27:57:41  1.1  6.36  14
PPM 097834     07:42:31.8 +22:57:23  5.9  1.28  14
PPM 097761     07:39:13.1 +22:16:46  7.8  0.56  13
PPM 097780     07:39:59.7 +21:40:01 10.0  0.14  14
98WY24         07:40:19.6 +21:46:53 13.6        14
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 4.4 sigma about the mid-time.
The median site spacing is 27.4 km RECON observability=1.0 and success probability=12.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 04:17:07 -38.1 Dark Up 30.6 92.2 Up 04:02:07 - 04:32:07 4391
Kelowna 04:17:08 -38.8 Dark Up 31.2 92.5 Up 04:02:08 - 04:32:08 4300
Peachland 04:17:09 -38.6 Dark Up 31.0 92.2 Up 04:02:09 - 04:32:09 4295
Sleaford 04:16:43 -46.2 Dark Up 39.2 105.4 Up 04:01:43 - 04:31:43 4287
Summerland 04:17:09 -38.7 Dark Up 31.0 92.1 Up 04:02:09 - 04:32:09 4280
Penticton 04:17:09 -38.8 Dark Up 31.1 92.2 Up 04:02:09 - 04:32:09 4272
Victoria 04:17:16 -36.5 Dark Up 28.6 88.7 Low 04:02:16 - 04:32:16 4257
Oliver 04:17:09 -38.9 Dark Up 31.1 92.0 Up 04:02:09 - 04:32:09 4239
Anarchist Mountain Observatory 04:17:10 -39.0 Dark Up 31.3 92.0 Up 04:02:10 - 04:32:10 4220
Tonasket 04:17:11 -39.0 Dark Up 31.2 91.8 Up 04:02:11 - 04:32:11 4192
Okanogan 04:17:11 -39.0 Dark Up 31.2 91.5 Up 04:02:11 - 04:32:11 4164
Brewster 04:17:13 -38.9 Dark Up 31.0 91.2 Up 04:02:13 - 04:32:13 4143
Manson/Chelan 04:17:14 -38.7 Dark Up 30.8 90.8 Up 04:02:14 - 04:32:14 4131
Wenatchee 04:17:15 -38.6 Dark Up 30.7 90.4 Up 04:02:15 - 04:32:15 4090
Ellensburg 04:17:16 -38.5 Dark Up 30.5 89.9 Up 04:02:16 - 04:32:16 4056
Yakima 04:17:17 -38.6 Dark Up 30.5 89.7 Up 04:02:17 - 04:32:17 4018
Toppenish/White Swan 04:17:17 -38.7 Dark Up 30.6 89.7 Up 04:02:17 - 04:32:17 3994
Goldendale 04:17:19 -38.5 Dark Up 30.3 89.1 Up 04:02:19 - 04:32:19 3951
The Dalles 04:17:20 -38.3 Dark Up 30.1 88.7 Up 04:02:20 - 04:32:20 3938
PNWRO 04:17:17 -39.8 Dark Up 31.7 90.6 Up 04:02:17 - 04:32:17 3928
Maupin 04:17:21 -38.4 Dark Up 30.2 88.5 Up 04:02:21 - 04:32:21 3896
Sisters 04:17:24 -38.1 Dark Up 29.8 87.7 Low 04:02:24 - 04:32:24 3823
Bend 04:17:24 -38.3 Dark Up 30.0 87.7 Low 04:02:24 - 04:32:24 3794
Oregon Observatory 04:17:25 -38.3 Dark Up 29.9 87.5 Low 04:02:25 - 04:32:25 3781
North Lake 04:17:25 -38.7 Dark Up 30.2 87.5 Up 04:02:25 - 04:32:25 3707
Chiloquin 04:17:28 -38.0 Dark Up 29.5 86.5 Low 04:02:28 - 04:32:28 3663
Klamath Falls 04:17:29 -38.1 Dark Up 29.5 86.4 Low 04:02:29 - 04:32:29 3628
Lakeview 04:17:27 -39.2 Dark Up 30.6 87.3 Up 04:02:27 - 04:32:27 3592
Cedarville 04:17:28 -39.4 Dark Up 30.7 87.0 Up 04:02:28 - 04:32:28 3523
Fall River/Burney 04:17:31 -38.5 Dark Up 29.8 86.0 Low 04:02:31 - 04:32:31 3504
Susanville 04:17:31 -39.0 Dark Up 30.3 86.1 Up 04:02:31 - 04:32:31 3424
Greenville 04:17:32 -38.8 Dark Up 30.0 85.7 Up 04:02:32 - 04:32:32 3404
Gimple 04:17:31 -38.9 Dark Up 30.1 85.8 Up 04:02:31 - 04:32:31 3402
Quincy 04:17:32 -38.8 Dark Up 30.0 85.6 Up 04:02:32 - 04:32:32 3384
Portola 04:17:32 -39.2 Dark Up 30.4 85.8 Up 04:02:32 - 04:32:32 3360
Reno 04:17:31 -39.7 Dark Up 30.9 86.1 Up 04:02:31 - 04:32:31 3318
Carson City 04:17:32 -39.7 Dark Up 30.8 85.9 Up 04:02:32 - 04:32:32 3282
Gardnerville 04:17:33 -39.8 Dark Up 30.9 85.7 Up 04:02:33 - 04:32:33 3257
Yerington 04:17:32 -40.2 Dark Up 31.3 86.1 Up 04:02:32 - 04:32:32 3248
Hawthorne 04:17:32 -40.7 Dark Up 31.7 86.1 Up 04:02:32 - 04:32:32 3189
Lee Vining 04:17:33 -40.3 Dark Up 31.3 85.5 Up 04:02:33 - 04:32:33 3143
Tonopah 04:17:30 -41.8 Dark Up 32.8 86.7 Up 04:02:30 - 04:32:30 3110
Dunrhomin 04:17:03 -50.7 Dark Up 42.0 96.1 Up 04:02:03 - 04:32:03 3104
Bishop 04:17:33 -40.9 Dark Up 31.8 85.6 Up 04:02:33 - 04:32:33 3066
Beatty 04:17:31 -42.2 Dark Up 33.1 86.2 Up 04:02:31 - 04:32:31 2981
Indian Springs 04:17:30 -43.1 Dark Up 33.9 86.6 Up 04:02:30 - 04:32:30 2923
Henderson 04:17:29 -43.6 Dark Up 34.4 86.6 Up 04:02:29 - 04:32:29 2853
Patrick 04:17:28 -44.6 Dark Up 35.3 86.8 Up 04:02:28 - 04:32:28 2764
Laughlin/Bullhead City 04:17:30 -44.0 Dark Up 34.7 86.2 Up 04:02:30 - 04:32:30 2754
Kingman/Dolan Springs 04:17:29 -44.4 Dark Up 35.1 86.5 Up 04:02:29 - 04:32:29 2745
Wildwood 04:17:39 -40.7 Dark Up 31.3 83.5 Up 04:02:39 - 04:32:39 2736
Mohave Valley 04:17:30 -44.0 Dark Up 34.7 86.1 Up 04:02:30 - 04:32:30 2725
Lake Havasu City 04:17:30 -44.2 Dark Up 34.9 85.9 Up 04:02:30 - 04:32:30 2678
Idyllwild 04:17:36 -42.3 Dark Up 32.9 84.2 Up 04:02:36 - 04:32:36 2653
Parker 04:17:31 -44.3 Dark Up 34.9 85.7 Up 04:02:31 - 04:32:31 2641
Calipatria 04:17:34 -43.2 Dark Up 33.8 84.4 Up 04:02:34 - 04:32:34 2562
George/Scottsdale 04:17:27 -46.3 Dark Up 36.9 86.6 Up 04:02:27 - 04:32:27 2544
Yuma 04:17:34 -44.0 Dark Up 34.5 84.5 Up 04:02:34 - 04:32:34 2496

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 98WY24, (2026/01/03 04:31UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  6.36  14
PPM 097834     07:40:58.5 +23:01:07  5.9  1.28  14
PPM 097761     07:37:40.1 +22:20:23  7.8  0.56  13
PPM 097780     07:38:27.2 +21:43:39 10.0  0.14  14
98WY24         07:38:47.0 +21:50:33 13.6        14
Positions are for J2000

Event circumstances last updated at 2022/01/07 23:44:12 UT

Marc W. Buie, Southwest Research Institute

RECON