RECON: TNO occultation with 468861

Event between (468861) 13LU28 and star GA1220:02766284 with event index number of 2655392

Geocentric closest approach at 2025/04/01 05:19:07 UTC

J2000 position of star is 06:30:44.0 +33:00:21
Equinox of date position of star is 06:32:12.3 +32:59:20
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 46 degrees from the moon. Moon is 11% illuminated.
TNO apparent brightness V=18.4

[RECON map]
TNO is 8.9 AU from the Sun and 8.9 AU from the Earth.
The TNO is moving 17.3 km/sec on the sky relative to the star, or, 9.6 arcsec/hr.
The 1-sigma error in the time of the event is 145 seconds.
The 1-sigma cross-track error in the shadow position is 1224 km.
The sky-plane scale is 6468.4 km/arcsec.

The TNO has an absolute magnitude Hv=8.4
Diameter=128.2 km assuming a 5% albedo -- 7.4 sec chord
Diameter=52.4 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 468861, (2025/04/01 05:19UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:51.6 +27:57:47  1.1 16.79  62
34Bet Aur      06:01:22.9 +44:56:50  1.9 13.38  42
PPM 071742     06:34:06.0 +32:26:05  6.0  0.66  46
PPM 071716     06:32:59.0 +33:05:59  9.7  0.17  46
468861         06:32:23.4 +32:59:12 16.0        46
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 28.6 km RECON observability=1.0 and success probability=19.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:15:34 -23.8 Dark Up 49.3 264.2 Up 05:02:57 - 05:28:11 -1260
Victoria 05:15:49 -23.8 Dark Up 51.5 264.3 Up 05:03:12 - 05:28:26 -1362
Kelowna 05:15:34 -24.8 Dark Up 48.8 265.9 Up 05:02:57 - 05:28:11 -1365
Peachland 05:15:35 -24.7 Dark Up 49.0 265.8 Up 05:02:58 - 05:28:12 -1366
Summerland 05:15:36 -24.9 Dark Up 49.0 266.0 Up 05:02:59 - 05:28:13 -1383
Penticton 05:15:36 -25.0 Dark Up 48.9 266.2 Up 05:02:59 - 05:28:13 -1393
Oliver 05:15:37 -25.2 Dark Up 48.9 266.6 Up 05:03:00 - 05:28:14 -1427
Sleaford 05:14:54 -28.4 Dark Up 40.4 274.1 Up 05:02:17 - 05:27:31 -1444
Anarchist Mountain Observatory 05:15:37 -25.4 Dark Up 48.8 266.9 Up 05:03:00 - 05:28:14 -1449
Tonasket 05:15:38 -25.6 Dark Up 48.8 267.2 Up 05:03:01 - 05:28:15 -1476
Okanogan 05:15:40 -25.8 Dark Up 49.0 267.5 Up 05:03:03 - 05:28:17 -1503
Brewster 05:15:41 -25.8 Dark Up 49.1 267.7 Up 05:03:04 - 05:28:18 -1522
Manson/Chelan 05:15:43 -25.8 Dark Up 49.3 267.6 Up 05:03:06 - 05:28:20 -1530
Wenatchee 05:15:45 -26.0 Dark Up 49.5 268.1 Up 05:03:08 - 05:28:22 -1569
Ellensburg 05:15:47 -26.2 Dark Up 49.6 268.4 Up 05:03:10 - 05:28:24 -1600
Yakima 05:15:48 -26.5 Dark Up 49.6 268.9 Up 05:03:11 - 05:28:25 -1638
Toppenish/White Swan 05:15:49 -26.7 Dark Up 49.5 269.2 Up 05:03:12 - 05:28:26 -1663
Goldendale 05:15:52 -26.8 Dark Up 49.8 269.6 Up 05:03:15 - 05:28:29 -1700
The Dalles 05:15:54 -26.8 Dark Up 50.1 269.6 Up 05:03:17 - 05:28:31 -1708
PNWRO 05:15:46 -27.7 Dark Up 48.5 270.7 Up 05:03:09 - 05:28:23 -1746
Maupin 05:15:55 -27.1 Dark Up 50.0 270.2 Up 05:03:18 - 05:28:32 -1750
Sisters 05:15:59 -27.4 Dark Up 50.3 270.9 Up 05:03:22 - 05:28:36 -1813
Bend 05:16:00 -27.7 Dark Up 50.1 271.4 Up 05:03:23 - 05:28:37 -1844
Oregon Observatory 05:16:01 -27.8 Dark Up 50.2 271.5 Up 05:03:24 - 05:28:38 -1855
North Lake 05:16:01 -28.5 Dark Up 49.8 272.6 Up 05:03:24 - 05:28:38 -1932
Chiloquin 05:16:07 -28.4 Dark Up 50.5 272.8 Up 05:03:30 - 05:28:44 -1958
Klamath Falls 05:16:07 -28.6 Dark Up 50.4 273.3 Up 05:03:30 - 05:28:44 -1992
Lakeview 05:16:03 -29.5 Dark Up 49.3 274.2 Up 05:03:26 - 05:28:40 -2047
Fall River/Burney 05:16:12 -29.6 Dark Up 50.0 274.9 Up 05:03:35 - 05:28:49 -2110
Cedarville 05:16:05 -30.0 Dark Up 49.1 275.1 Up 05:03:28 - 05:28:42 -2112
Susanville 05:16:12 -30.4 Dark Up 49.4 276.1 Up 05:03:35 - 05:28:49 -2193
Greenville 05:16:13 -30.4 Dark Up 49.6 276.3 Up 05:03:36 - 05:28:50 -2207
Gimple 05:16:13 -30.5 Dark Up 49.5 276.3 Up 05:03:36 - 05:28:50 -2210
Quincy 05:16:14 -30.6 Dark Up 49.5 276.5 Up 05:03:37 - 05:28:51 -2224
Portola 05:16:13 -30.9 Dark Up 49.2 276.9 Up 05:03:36 - 05:28:50 -2253
Reno 05:16:12 -31.5 Dark Up 48.6 277.5 Up 05:03:35 - 05:28:49 -2300
Carson City 05:16:13 -31.7 Dark Up 48.6 278.0 Up 05:03:36 - 05:28:50 -2332
Gardnerville 05:16:14 -31.9 Dark Up 48.5 278.3 Up 05:03:37 - 05:28:51 -2355
Yerington 05:16:12 -32.2 Dark Up 48.1 278.5 Up 05:03:35 - 05:28:49 -2372
Hawthorne 05:16:12 -32.8 Dark Up 47.6 279.3 Up 05:03:35 - 05:28:49 -2431
Lee Vining 05:16:16 -32.9 Dark Up 47.8 279.7 Up 05:03:39 - 05:28:53 -2464
Tonopah 05:16:09 -34.0 Dark Up 46.4 280.4 Up 05:03:32 - 05:28:46 -2521
Bishop 05:16:17 -33.7 Dark Up 47.2 280.6 Up 05:03:40 - 05:28:54 -2541
Dunrhomin 05:15:26 -38.6 Dark Down 37.9 284.2 Up 05:02:49 - 05:28:03 -2623
Beatty 05:16:13 -35.0 Dark Up 45.8 281.8 Up 05:03:36 - 05:28:50 -2637
CU-SBO 05:15:27 -38.8 Dark Down 37.9 284.4 Up 05:02:50 - 05:28:04 -2645
Indian Springs 05:16:10 -35.9 Dark Up 44.9 282.6 Up 05:03:33 - 05:28:47 -2700
Henderson 05:16:11 -36.7 Dark Up 44.2 283.4 Up 05:03:34 - 05:28:48 -2768
Wildwood 05:16:30 -35.7 Dark Up 46.6 284.0 Up 05:03:53 - 05:29:07 -2810
Laughlin/Bullhead City 05:16:12 -37.5 Dark Down 43.7 284.4 Up 05:03:35 - 05:28:49 -2856
Patrick 05:16:10 -37.7 Dark Down 43.2 284.4 Up 05:03:33 - 05:28:47 -2857
Kingman/Dolan Springs 05:16:10 -37.8 Dark Down 43.3 284.6 Up 05:03:33 - 05:28:47 -2870
Mohave Valley 05:16:13 -37.7 Dark Down 43.6 284.6 Up 05:03:36 - 05:28:50 -2879
Idyllwild 05:16:25 -37.1 Dark Up 45.0 285.0 Up 05:03:48 - 05:29:02 -2908
Lake Havasu City 05:16:14 -38.1 Dark Down 43.3 285.1 Up 05:03:37 - 05:28:51 -2921
Parker 05:16:15 -38.3 Dark Down 43.2 285.4 Up 05:03:38 - 05:28:52 -2952
Calipatria 05:16:23 -38.2 Dark Down 43.9 286.0 Up 05:03:46 - 05:29:00 -2998
George/Scottsdale 05:16:09 -40.1 Dark Down 41.2 286.6 Up 05:03:32 - 05:28:46 -3060
Yuma 05:16:21 -39.1 Dark Down 43.1 286.6 Up 05:03:44 - 05:28:58 -3063

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, (2025/04/01 05:19UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 16.79  62
34Bet Aur      05:59:31.6 +44:56:51  1.9 13.38  42
PPM 071742     06:32:27.1 +32:27:18  6.0  0.66  46
PPM 071716     06:31:19.6 +33:07:09  9.7  0.17  46
468861         06:30:44.0 +33:00:21 16.0        46
Positions are for J2000

Event circumstances last updated at 2022/06/07 22:26:35 UT

Marc W. Buie, Southwest Research Institute

RECON