RECON: TNO occultation with 468861

Event between (468861) 13LU28 and star GA1100:01716721 with event index number of 1523824

Geocentric closest approach at 2026/01/26 05:24:45 UTC

J2000 position of star is 06:04:12.3 +20:56:56
Equinox of date position of star is 06:05:21.2 +20:56:48
Stellar brightness G=16.0, use SENSEUP=128
Star is 55 degrees from the moon. Moon is 50% illuminated.
TNO apparent brightness V=17.9

[RECON map]
TNO is 9.3 AU from the Sun and 8.5 AU from the Earth.
The TNO is moving 33.8 km/sec on the sky relative to the star, or, 19.7 arcsec/hr.
The 1-sigma error in the time of the event is 11 seconds.
The 1-sigma cross-track error in the shadow position is 695 km.
The sky-plane scale is 6179.1 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=144.5 km assuming a 5% albedo -- 4.3 sec chord
Diameter=59.0 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 468861, (2026/01/26 05:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:35.0 +07:24:35  0.4 13.72  55
Alhena         06:39:13.0 +16:22:29  1.9  9.14  63
62Chi2Ori      06:05:28.1 +20:08:08  4.5  0.81  55
PPM 095290     06:04:40.2 +20:35:02  7.7  0.44  55
PPM 095280     06:04:17.7 +20:47:59 10.0  0.37  54
PPM 095317     06:05:28.9 +20:53:17 11.4  0.09  55
468861         06:05:45.8 +20:56:44 16.0        55
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 5.0 sigma about the mid-time.
The median site spacing is 20.9 km RECON observability=1.0 and success probability=22.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 05:24:28 -44.7 Dark Up 60.9 172.7 Up 05:23:03 - 05:25:53 2559
Summerland 05:24:29 -44.7 Dark Up 61.2 172.1 Up 05:23:04 - 05:25:54 2538
Penticton 05:24:29 -44.8 Dark Up 61.2 172.3 Up 05:23:04 - 05:25:54 2529
Okanagan Falls 05:24:29 -44.8 Dark Up 61.4 172.2 Up 05:23:04 - 05:25:54 2512
Oliver 05:24:29 -44.9 Dark Up 61.6 172.2 Up 05:23:04 - 05:25:54 2497
Anarchist Mountain Observatory 05:24:29 -45.1 Dark Up 61.8 172.5 Up 05:23:04 - 05:25:54 2476
Oroville 05:24:29 -45.1 Dark Up 61.8 172.4 Up 05:23:04 - 05:25:54 2471
Tonasket 05:24:29 -45.2 Dark Up 62.1 172.3 Up 05:23:04 - 05:25:54 2450
Okanogan 05:24:30 -45.3 Dark Up 62.4 171.9 Up 05:23:05 - 05:25:55 2422
Brewster 05:24:31 -45.3 Dark Up 62.6 171.5 Up 05:23:06 - 05:25:56 2401
Manson/Chelan 05:24:31 -45.1 Dark Up 62.8 170.7 Up 05:23:06 - 05:25:56 2390
Entiat 05:24:32 -45.2 Dark Up 63.0 170.5 Up 05:23:07 - 05:25:57 2371
Wenatchee 05:24:32 -45.2 Dark Up 63.3 170.2 Up 05:23:07 - 05:25:57 2350
Ellensburg 05:24:33 -45.3 Dark Up 63.6 169.6 Up 05:23:08 - 05:25:58 2317
Yakima 05:24:34 -45.4 Dark Up 64.0 169.4 Up 05:23:09 - 05:25:59 2279
Toppenish/White Swan 05:24:34 -45.6 Dark Up 64.3 169.7 Up 05:23:09 - 05:25:59 2255
Pasco 05:24:31 -46.5 Dark Up 64.5 172.3 Up 05:23:06 - 05:25:56 2213
Goldendale 05:24:35 -45.6 Dark Up 64.8 168.5 Up 05:23:10 - 05:26:00 2213
The Dalles 05:24:36 -45.4 Dark Up 64.9 167.7 Up 05:23:11 - 05:26:01 2201
George/Umatilla 05:24:32 -46.5 Dark Up 64.8 171.8 Up 05:23:07 - 05:25:57 2186
PNWRO 05:24:31 -46.7 Dark Up 64.8 172.8 Up 05:23:06 - 05:25:56 2184
Maupin 05:24:36 -45.7 Dark Up 65.4 167.7 Up 05:23:11 - 05:26:01 2158
Madras/Culver 05:24:37 -45.9 Dark Up 65.9 167.4 Up 05:23:12 - 05:26:02 2107
Sisters 05:24:38 -45.7 Dark Up 66.1 166.2 Up 05:23:13 - 05:26:03 2087
Redmond 05:24:37 -46.0 Dark Up 66.2 167.1 Up 05:23:12 - 05:26:02 2074
Bend 05:24:38 -45.9 Dark Up 66.4 166.6 Up 05:23:13 - 05:26:03 2058
Oregon Observatory 05:24:38 -45.9 Dark Up 66.6 166.2 Up 05:23:13 - 05:26:03 2044
La Pine/Gilchrist 05:24:39 -45.9 Dark Up 66.7 166.0 Up 05:23:14 - 05:26:04 2026
North Lake 05:24:38 -46.5 Dark Up 67.3 167.2 Up 05:23:13 - 05:26:03 1969
Chiloquin 05:24:41 -46.1 Dark Up 67.8 164.5 Up 05:23:16 - 05:26:06 1929
Paisley 05:24:38 -46.9 Dark Up 67.9 167.7 Up 05:23:13 - 05:26:03 1906
Klamath Falls 05:24:41 -46.3 Dark Up 68.1 164.5 Up 05:23:16 - 05:26:06 1893
Tulelake 05:24:41 -46.6 Dark Up 68.4 165.0 Up 05:23:16 - 05:26:06 1859
Lakeview 05:24:38 -47.3 Dark Up 68.4 168.0 Up 05:23:13 - 05:26:03 1852
Cedarville 05:24:38 -47.6 Dark Up 69.1 168.1 Up 05:23:13 - 05:26:03 1784
Fall River/Burney 05:24:41 -46.9 Dark Up 69.3 164.6 Up 05:23:16 - 05:26:06 1769
Susanville 05:24:40 -47.6 Dark Up 70.1 166.1 Up 05:23:15 - 05:26:05 1687
Greenville 05:24:42 -47.5 Dark Up 70.3 165.2 Up 05:23:17 - 05:26:07 1668
Gimple 05:24:41 -47.6 Dark Up 70.3 165.4 Up 05:23:16 - 05:26:06 1665
Quincy 05:24:42 -47.6 Dark Up 70.5 165.0 Up 05:23:17 - 05:26:07 1648
Portola 05:24:41 -47.9 Dark Up 70.7 166.3 Up 05:23:16 - 05:26:06 1622
Reno 05:24:39 -48.5 Dark Up 71.1 167.9 Up 05:23:14 - 05:26:04 1579
Carson City 05:24:40 -48.6 Dark Up 71.4 167.7 Up 05:23:15 - 05:26:05 1542
Gardnerville 05:24:40 -48.7 Dark Up 71.7 167.7 Up 05:23:15 - 05:26:05 1517
Yerington 05:24:38 -49.1 Dark Up 71.7 169.5 Up 05:23:13 - 05:26:03 1506
Hawthorne 05:24:38 -49.7 Dark Up 72.2 170.8 Up 05:23:13 - 05:26:03 1446
Lee Vining 05:24:39 -49.5 Dark Up 72.7 169.0 Up 05:23:14 - 05:26:04 1402
Tonopah 05:24:35 -50.9 Dark Up 72.8 174.9 Up 05:23:10 - 05:26:00 1362
Bishop 05:24:38 -50.2 Dark Up 73.4 170.9 Up 05:23:13 - 05:26:03 1322
Niwot 05:24:04 -58.3 Dark Up 68.9 207.7 Up 05:22:39 - 05:25:29 1303
SwRI 05:24:04 -58.3 Dark Up 69.0 207.6 Up 05:22:39 - 05:25:29 1294
Lone Pine 05:24:38 -50.7 Dark Up 74.2 171.6 Up 05:23:13 - 05:26:03 1236
Beatty 05:24:34 -51.6 Dark Up 74.0 176.1 Up 05:23:09 - 05:25:59 1232
CPSLO 05:24:46 -49.0 Dark Up 75.0 161.7 Up 05:23:21 - 05:26:11 1176
Indian Springs 05:24:32 -52.5 Dark Up 74.4 179.8 Up 05:23:07 - 05:25:57 1171
Henderson 05:24:31 -53.2 Dark Up 74.9 182.2 Up 05:23:06 - 05:25:56 1099
Searchlight/Boulder City 05:24:31 -53.4 Dark Up 75.5 182.5 Up 05:23:06 - 05:25:56 1038
Patrick 05:24:28 -54.2 Dark Up 75.5 186.4 Up 05:23:03 - 05:25:53 1006
Laughlin/Bullhead City 05:24:30 -53.8 Dark Up 75.8 183.9 Up 05:23:05 - 05:25:55 998
Wildwood 05:24:42 -50.9 Dark Up 76.6 168.0 Up 05:23:17 - 05:26:07 995
Kingman/Dolan Springs 05:24:29 -54.2 Dark Up 75.7 185.8 Up 05:23:04 - 05:25:54 988
Mohave Valley 05:24:31 -53.9 Dark Up 76.0 184.0 Up 05:23:06 - 05:25:56 970
DCO 05:24:27 -54.9 Dark Up 75.7 189.2 Up 05:23:02 - 05:25:52 956
Lake Havasu City 05:24:30 -54.2 Dark Up 76.4 185.1 Up 05:23:05 - 05:25:55 922
Idyllwild 05:24:37 -52.5 Dark Up 77.2 175.4 Up 05:23:12 - 05:26:02 906
Parker 05:24:31 -54.3 Dark Up 76.8 185.4 Up 05:23:06 - 05:25:56 885
Blythe 05:24:32 -54.2 Dark Up 77.3 184.3 Up 05:23:07 - 05:25:57 838
Calipatria 05:24:35 -53.6 Dark Up 77.8 180.4 Up 05:23:10 - 05:26:00 811
Yuma 05:24:33 -54.4 Dark Up 78.2 184.5 Up 05:23:08 - 05:25:58 743

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 468861, (2026/01/26 05:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 13.72  55
Alhena         06:37:42.8 +16:23:57  1.9  9.14  63
62Chi2Ori      06:03:55.2 +20:08:18  4.5  0.81  55
PPM 095290     06:03:06.9 +20:35:11  7.7  0.44  55
PPM 095280     06:02:44.3 +20:48:07 10.0  0.37  54
PPM 095317     06:03:55.4 +20:53:28 11.4  0.09  55
468861         06:04:12.3 +20:56:56 16.0        55
Positions are for J2000

Event circumstances last updated at 2019/03/25 01:17:39 UT

Marc W. Buie, Southwest Research Institute

RECON