RECON: TNO occultation with 450265

Event between (450265) 03WU172 and star GA1120:03024039 with event index number of 1498388

Geocentric closest approach at 2026/01/02 05:35:29 UTC

J2000 position of star is 08:24:02.9 +23:25:00
Equinox of date position of star is 08:25:14.6 +23:21:01
Stellar brightness G=15.1, use SENSEUP=128
Star is 37 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=24.7

[RECON map]
TNO is 29.3 AU from the Sun and 28.4 AU from the Earth.
The TNO is moving 22.1 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 407 seconds.
The 1-sigma cross-track error in the shadow position is 4231 km.
The sky-plane scale is 20577.2 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=363.1 km assuming a 5% albedo -- 2.7 sec chord
Diameter=148.2 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 450265, (2026/01/02 05:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.5 +27:57:41  1.1  9.86  28
19Lam Cnc      08:22:04.7 +23:56:19  5.9  1.01  36
PPM 098654     08:25:03.4 +23:26:57  8.1  0.17  37
450265         08:25:34.9 +23:19:53 15.1        38
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 24.2 km RECON observability=1.0 and success probability=11.8%
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 05:38:46 -51.1 Dark Up 37.6 98.1 Up 05:23:46 - 05:53:46 -1379
Kelowna 05:38:47 -51.2 Dark Up 37.5 97.7 Up 05:23:47 - 05:53:47 -1416
Peachland 05:38:48 -51.1 Dark Up 37.4 97.4 Up 05:23:48 - 05:53:48 -1423
Summerland 05:38:48 -51.2 Dark Up 37.4 97.3 Up 05:23:48 - 05:53:48 -1439
Penticton 05:38:48 -51.3 Dark Up 37.5 97.4 Up 05:23:48 - 05:53:48 -1447
Oliver 05:38:49 -51.5 Dark Up 37.6 97.1 Up 05:23:49 - 05:53:49 -1482
Victoria 05:38:57 -49.6 Dark Up 35.1 93.6 Up 05:23:57 - 05:53:57 -1489
Anarchist Mountain Observatory 05:38:49 -51.7 Dark Up 37.7 97.1 Up 05:23:49 - 05:53:49 -1502
Tonasket 05:38:49 -51.8 Dark Up 37.7 96.8 Up 05:23:49 - 05:53:49 -1532
Okanogan 05:38:50 -51.9 Dark Up 37.7 96.5 Up 05:23:50 - 05:53:50 -1564
Brewster 05:38:51 -51.9 Dark Up 37.6 96.1 Up 05:23:51 - 05:53:51 -1588
Manson/Chelan 05:38:53 -51.8 Dark Up 37.3 95.6 Up 05:23:53 - 05:53:53 -1604
Entiat 05:38:53 -51.9 Dark Up 37.3 95.4 Up 05:23:53 - 05:53:53 -1625
Wenatchee 05:38:54 -51.9 Dark Up 37.3 95.2 Up 05:23:54 - 05:53:54 -1649
Ellensburg 05:38:55 -52.0 Dark Up 37.2 94.7 Up 05:23:55 - 05:53:55 -1687
Yakima 05:38:56 -52.1 Dark Up 37.2 94.4 Up 05:23:56 - 05:53:56 -1728
Toppenish/White Swan 05:38:56 -52.3 Dark Up 37.3 94.3 Up 05:23:56 - 05:53:56 -1753
Pasco 05:38:53 -53.2 Dark Up 38.2 95.2 Up 05:23:53 - 05:53:53 -1785
Goldendale 05:38:58 -52.3 Dark Up 37.1 93.6 Up 05:23:58 - 05:53:58 -1803
PNWRO 05:38:54 -53.4 Dark Up 38.4 95.2 Up 05:23:54 - 05:53:54 -1813
The Dalles 05:38:59 -52.2 Dark Up 36.8 93.2 Up 05:23:59 - 05:53:59 -1820
Maupin 05:39:00 -52.4 Dark Up 36.9 92.9 Up 05:24:00 - 05:54:00 -1864
Sisters 05:39:02 -52.5 Dark Up 36.6 91.9 Up 05:24:02 - 05:54:02 -1946
Redmond 05:39:02 -52.7 Dark Up 36.9 92.2 Up 05:24:02 - 05:54:02 -1955
Bend 05:39:02 -52.7 Dark Up 36.8 91.9 Up 05:24:02 - 05:54:02 -1975
Oregon Observatory 05:39:03 -52.7 Dark Up 36.7 91.7 Up 05:24:03 - 05:54:03 -1991
La Pine/Gilchrist 05:39:03 -52.7 Dark Up 36.7 91.5 Up 05:24:03 - 05:54:03 -2011
North Lake 05:39:03 -53.3 Dark Up 37.1 91.6 Up 05:24:03 - 05:54:03 -2066
Paisley 05:39:03 -53.7 Dark Up 37.4 91.4 Up 05:24:03 - 05:54:03 -2129
Klamath Falls 05:39:07 -53.1 Dark Up 36.5 90.2 Up 05:24:07 - 05:54:07 -2157
Lakeview 05:39:04 -54.1 Dark Up 37.6 91.2 Up 05:24:04 - 05:54:04 -2185
Cedarville 05:39:04 -54.4 Dark Up 37.7 90.8 Up 05:24:04 - 05:54:04 -2256
Fall River/Burney 05:39:08 -53.7 Dark Up 36.8 89.6 Up 05:24:08 - 05:54:08 -2286
Susanville 05:39:08 -54.4 Dark Up 37.4 89.6 Up 05:24:08 - 05:54:08 -2365
Greenville 05:39:08 -54.3 Dark Up 37.1 89.2 Up 05:24:08 - 05:54:08 -2389
Gimple 05:39:08 -54.4 Dark Up 37.2 89.3 Up 05:24:08 - 05:54:08 -2391
Quincy 05:39:09 -54.4 Dark Up 37.1 89.1 Up 05:24:09 - 05:54:09 -2410
Portola 05:39:08 -54.8 Dark Up 37.5 89.3 Up 05:24:08 - 05:54:08 -2432
Reno 05:39:07 -55.3 Dark Up 38.0 89.5 Up 05:24:07 - 05:54:07 -2471
Carson City 05:39:07 -55.4 Dark Up 38.0 89.2 Up 05:24:07 - 05:54:07 -2509
Gardnerville 05:39:07 -55.6 Dark Up 38.0 89.1 Up 05:24:07 - 05:54:07 -2536
Yerington 05:39:06 -56.0 Dark Up 38.5 89.5 Up 05:24:06 - 05:54:06 -2540
Niwot 05:38:29 -65.0 Dark Up 49.0 100.2 Up 05:23:29 - 05:53:29 -2586
SwRI 05:38:28 -65.0 Dark Up 49.0 100.0 Up 05:23:28 - 05:53:28 -2597
Hawthorne 05:39:05 -56.5 Dark Up 38.9 89.4 Up 05:24:05 - 05:54:05 -2599
Lee Vining 05:39:07 -56.3 Dark Up 38.5 88.7 Up 05:24:07 - 05:54:07 -2650
Tonopah 05:39:02 -57.7 Dark Up 40.0 89.9 Up 05:24:02 - 05:54:02 -2671
Bishop 05:39:06 -57.0 Dark Up 39.1 88.6 Up 05:24:06 - 05:54:06 -2726
Beatty 05:39:03 -58.4 Dark Up 40.4 89.2 Up 05:24:03 - 05:54:03 -2802
Indian Springs 05:39:01 -59.3 Dark Up 41.2 89.5 Up 05:24:01 - 05:54:01 -2853
CPSLO 05:39:15 -55.8 Dark Up 37.2 85.8 Up 05:24:15 - 05:54:15 -2908
Henderson 05:39:00 -60.0 Dark Up 41.8 89.5 Up 05:24:00 - 05:54:00 -2921
Searchlight/Boulder City 05:39:01 -60.2 Dark Up 41.8 89.0 Up 05:24:01 - 05:54:01 -2984
Patrick 05:38:58 -61.1 Dark Up 42.7 89.5 Up 05:23:58 - 05:53:58 -3004
Laughlin/Bullhead City 05:39:00 -60.6 Dark Up 42.1 88.9 Up 05:24:00 - 05:54:00 -3021
Kingman/Dolan Springs 05:38:58 -61.0 Dark Up 42.5 89.2 Up 05:23:58 - 05:53:58 -3026
DCO 05:38:56 -61.7 Dark Up 43.2 89.7 Up 05:23:56 - 05:53:56 -3047
Mohave Valley 05:39:00 -60.7 Dark Up 42.1 88.7 Up 05:24:00 - 05:54:00 -3051
Wildwood 05:39:11 -57.6 Dark Up 38.8 85.9 Up 05:24:11 - 05:54:11 -3074
Lake Havasu City 05:39:00 -61.0 Dark Up 42.3 88.5 Up 05:24:00 - 05:54:00 -3098
Parker 05:39:00 -61.1 Dark Up 42.3 88.2 Up 05:24:00 - 05:54:00 -3136
Idyllwild 05:39:07 -59.2 Dark Up 40.3 86.5 Up 05:24:07 - 05:54:07 -3144
Blythe 05:39:01 -61.0 Dark Up 42.0 87.5 Up 05:24:01 - 05:54:01 -3189
George/Scottsdale 05:38:54 -63.1 Dark Up 44.3 89.1 Up 05:23:54 - 05:53:54 -3215
Calipatria 05:39:04 -60.3 Dark Up 41.2 86.6 Up 05:24:04 - 05:54:04 -3229
Yuma 05:39:02 -61.1 Dark Up 42.0 86.7 Up 05:24:02 - 05:54:02 -3289

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 450265, (2026/01/02 05:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1  9.86  28
19Lam Cnc      08:20:32.1 +24:01:20  5.9  1.01  36
PPM 098654     08:23:31.3 +23:32:04  8.1  0.17  37
450265         08:24:02.9 +23:25:00 15.1        37
Positions are for J2000

Event circumstances last updated at 2020/03/29 22:10:35 UT

Marc W. Buie, Southwest Research Institute

RECON