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 05:27:22 UTC

J2000 position of star is 08:24:02.9 +23:25:00
Equinox of date position of star is 08:25:16.8 +23:20:53
Stellar brightness G=15.1, use SENSEUP=128
Star is 38 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=20.8

[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 221 seconds.
The 1-sigma cross-track error in the shadow position is 2417 km.
The sky-plane scale is 20577.4 km/arcsec.

The TNO has an absolute magnitude Hv=6.1
Diameter=363.1 km assuming a 5% albedo -- 16.5 sec chord
Diameter=148.2 km assuming a 30% albedo -- 6.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 450265, (2026/01/02 05:27UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.4 +27:57:41  1.1  9.86  28
19Lam Cnc      08:22:04.7 +23:56:19  5.9  1.01  37
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 4.1 sigma about the mid-time.
The median site spacing is 24.0 km RECON observability=1.0 and success probability=17.7%
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 05:30:42 -50.0 Dark Up 36.3 96.4 Up 05:15:42 - 05:45:42 -1326
Kelowna 05:30:44 -50.1 Dark Up 36.3 96.0 Up 05:15:44 - 05:45:44 -1362
Peachland 05:30:44 -50.0 Dark Up 36.1 95.7 Up 05:15:44 - 05:45:44 -1369
Summerland 05:30:44 -50.1 Dark Up 36.1 95.7 Up 05:15:44 - 05:45:44 -1385
Penticton 05:30:44 -50.2 Dark Up 36.2 95.7 Up 05:15:44 - 05:45:44 -1393
Oliver 05:30:45 -50.4 Dark Up 36.3 95.5 Up 05:15:45 - 05:45:45 -1428
Victoria 05:30:53 -48.4 Dark Up 33.8 92.0 Up 05:15:53 - 05:45:53 -1431
Anarchist Mountain Observatory 05:30:45 -50.6 Dark Up 36.4 95.5 Up 05:15:45 - 05:45:45 -1448
Tonasket 05:30:46 -50.7 Dark Up 36.4 95.2 Up 05:15:46 - 05:45:46 -1478
Okanogan 05:30:47 -50.7 Dark Up 36.3 94.9 Up 05:15:47 - 05:45:47 -1509
Brewster 05:30:48 -50.7 Dark Up 36.2 94.5 Up 05:15:48 - 05:45:48 -1533
Manson/Chelan 05:30:49 -50.6 Dark Up 36.0 94.1 Up 05:15:49 - 05:45:49 -1548
Entiat 05:30:50 -50.7 Dark Up 36.0 93.9 Up 05:15:50 - 05:45:50 -1569
Wenatchee 05:30:50 -50.7 Dark Up 35.9 93.6 Up 05:15:50 - 05:45:50 -1593
Ellensburg 05:30:52 -50.7 Dark Up 35.8 93.1 Up 05:15:52 - 05:45:52 -1631
Yakima 05:30:53 -50.9 Dark Up 35.8 92.8 Up 05:15:53 - 05:45:53 -1672
Toppenish/White Swan 05:30:53 -51.1 Dark Up 35.9 92.8 Up 05:15:53 - 05:45:53 -1696
Pasco 05:30:51 -51.9 Dark Up 36.8 93.7 Up 05:15:51 - 05:45:51 -1729
Goldendale 05:30:55 -51.0 Dark Up 35.7 92.1 Up 05:15:55 - 05:45:55 -1745
PNWRO 05:30:51 -52.2 Dark Up 37.0 93.6 Up 05:15:51 - 05:45:51 -1758
The Dalles 05:30:56 -50.9 Dark Up 35.4 91.7 Up 05:15:56 - 05:45:56 -1762
Maupin 05:30:57 -51.1 Dark Up 35.5 91.4 Up 05:15:57 - 05:45:57 -1806
Sisters 05:31:00 -51.1 Dark Up 35.2 90.5 Up 05:16:00 - 05:46:00 -1887
Redmond 05:30:58 -51.4 Dark Up 35.5 90.7 Up 05:15:58 - 05:45:58 -1897
Bend 05:30:59 -51.4 Dark Up 35.4 90.5 Up 05:15:59 - 05:45:59 -1916
Oregon Observatory 05:31:00 -51.3 Dark Up 35.3 90.3 Up 05:16:00 - 05:46:00 -1931
La Pine/Gilchrist 05:31:00 -51.4 Dark Up 35.2 90.1 Up 05:16:00 - 05:46:00 -1951
North Lake 05:31:00 -51.9 Dark Up 35.7 90.2 Up 05:16:00 - 05:46:00 -2007
Paisley 05:31:00 -52.4 Dark Up 35.9 90.0 Up 05:16:00 - 05:46:00 -2070
Klamath Falls 05:31:04 -51.6 Dark Up 35.0 88.9 Up 05:16:04 - 05:46:04 -2096
Lakeview 05:31:01 -52.7 Dark Up 36.1 89.8 Up 05:16:01 - 05:46:01 -2126
Cedarville 05:31:02 -53.0 Dark Up 36.2 89.5 Up 05:16:02 - 05:46:02 -2197
Fall River/Burney 05:31:05 -52.3 Dark Up 35.3 88.3 Up 05:16:05 - 05:46:05 -2225
Susanville 05:31:05 -53.0 Dark Up 35.8 88.3 Up 05:16:05 - 05:46:05 -2305
Greenville 05:31:06 -52.8 Dark Up 35.6 88.0 Up 05:16:06 - 05:46:06 -2328
Gimple 05:31:06 -52.9 Dark Up 35.7 88.0 Up 05:16:06 - 05:46:06 -2330
Quincy 05:31:06 -52.9 Dark Up 35.6 87.8 Up 05:16:06 - 05:46:06 -2350
Portola 05:31:06 -53.3 Dark Up 36.0 88.0 Up 05:16:06 - 05:46:06 -2371
Reno 05:31:04 -53.8 Dark Up 36.4 88.2 Up 05:16:04 - 05:46:04 -2411
Carson City 05:31:05 -54.0 Dark Up 36.5 88.0 Up 05:16:05 - 05:46:05 -2449
Gardnerville 05:31:05 -54.1 Dark Up 36.5 87.8 Up 05:16:05 - 05:46:05 -2476
Yerington 05:31:03 -54.5 Dark Up 36.9 88.2 Up 05:16:03 - 05:46:03 -2481
Hawthorne 05:31:03 -55.0 Dark Up 37.3 88.2 Up 05:16:03 - 05:46:03 -2540
Niwot 05:30:27 -63.7 Dark Up 47.5 98.6 Up 05:15:27 - 05:45:27 -2546
SwRI 05:30:28 -63.7 Dark Up 47.5 98.5 Up 05:15:28 - 05:45:28 -2557
Lee Vining 05:31:05 -54.8 Dark Up 36.9 87.5 Up 05:16:05 - 05:46:05 -2591
Tonopah 05:31:00 -56.2 Dark Up 38.4 88.7 Up 05:16:00 - 05:46:00 -2614
Bishop 05:31:05 -55.5 Dark Up 37.5 87.4 Up 05:16:05 - 05:46:05 -2667
Beatty 05:31:01 -56.9 Dark Up 38.8 88.0 Up 05:16:01 - 05:46:01 -2745
Indian Springs 05:30:59 -57.8 Dark Up 39.6 88.4 Up 05:15:59 - 05:45:59 -2798
CPSLO 05:31:12 -54.1 Dark Up 35.5 84.7 Up 05:16:12 - 05:46:12 -2845
Henderson 05:30:58 -58.4 Dark Up 40.1 88.3 Up 05:15:58 - 05:45:58 -2866
Searchlight/Boulder City 05:30:59 -58.6 Dark Up 40.2 87.9 Up 05:15:59 - 05:45:59 -2929
Patrick 05:30:56 -59.5 Dark Up 41.0 88.4 Up 05:15:56 - 05:45:56 -2951
Laughlin/Bullhead City 05:30:58 -59.0 Dark Up 40.4 87.8 Up 05:15:58 - 05:45:58 -2967
Kingman/Dolan Springs 05:30:57 -59.4 Dark Up 40.9 88.1 Up 05:15:57 - 05:45:57 -2972
DCO 05:30:55 -60.1 Dark Up 41.6 88.5 Up 05:15:55 - 05:45:55 -2995
Mohave Valley 05:30:58 -59.1 Dark Up 40.4 87.6 Up 05:15:58 - 05:45:58 -2996
Wildwood 05:31:09 -56.0 Dark Up 37.1 84.9 Up 05:16:09 - 05:46:09 -3014
Lake Havasu City 05:30:58 -59.4 Dark Up 40.6 87.4 Up 05:15:58 - 05:45:58 -3043
Parker 05:30:58 -59.5 Dark Up 40.6 87.1 Up 05:15:58 - 05:45:58 -3082
Idyllwild 05:31:05 -57.6 Dark Up 38.6 85.5 Up 05:16:05 - 05:46:05 -3086
Blythe 05:31:00 -59.3 Dark Up 40.4 86.5 Up 05:16:00 - 05:46:00 -3134
George/Scottsdale 05:30:52 -61.5 Dark Up 42.6 88.0 Up 05:15:52 - 05:45:52 -3164
Calipatria 05:31:02 -58.7 Dark Up 39.6 85.6 Up 05:16:02 - 05:46:02 -3172
Yuma 05:31:00 -59.5 Dark Up 40.3 85.7 Up 05:16:00 - 05:46:00 -3234

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 05:27UT)
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  37
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 2020/11/20 02:42:59 UT

Marc W. Buie, Southwest Research Institute

RECON