RECON: TNO occultation with 11VZ24

Event between 11VZ24 and star GA0920:00855281 with event index number of 2138553

Geocentric closest approach at 2025/10/18 11:19:59 UTC

J2000 position of star is 05:43:07.8 +02:07:37
Equinox of date position of star is 05:44:16.2 +02:08:08
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 86 degrees from the moon. Moon is 9% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 36.9 AU from the Sun and 36.4 AU from the Earth.
The TNO is moving 14.2 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 275 seconds.
The 1-sigma cross-track error in the shadow position is 4921 km.
The sky-plane scale is 26390.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.0
Diameter=242.1 km assuming a 5% albedo -- 17.1 sec chord
Diameter=98.8 km assuming a 30% albedo -- 7.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 11VZ24, (2025/10/18 11:20UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:34.1 +07:24:35  0.4  6.07  83
34Del Ori      05:33:19.5 -00:16:55  2.2  3.69  89
51 Ori         05:43:48.8 +01:29:06  4.9  0.67  86
PPM 149338     05:43:38.4 +02:22:39  6.7  0.32  86
PPM 149341     05:43:43.1 +01:53:15  9.1  0.31  86
11VZ24         05:44:28.4 +02:08:14 15.9        86
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 3.3 sigma about the mid-time.
The median site spacing is 15.3 km RECON observability=1.0 and success probability=6.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 11:16:50 -33.5 Dark Down 42.3 162.6 Up 11:01:50 - 11:31:50 5749
Kamloops 11:16:30 -30.8 Dark Down 40.7 167.0 Up 11:01:30 - 11:31:30 5673
Peachland 11:16:32 -30.8 Dark Down 41.7 167.6 Up 11:01:32 - 11:31:32 5605
Summerland 11:16:30 -30.8 Dark Down 41.9 167.7 Up 11:01:30 - 11:31:30 5594
Kelowna 11:16:30 -30.6 Dark Down 41.7 168.0 Up 11:01:30 - 11:31:30 5593
Penticton 11:16:31 -30.8 Dark Down 42.0 167.8 Up 11:01:31 - 11:31:31 5585
Oliver 11:16:34 -30.9 Dark Down 42.3 167.8 Up 11:01:34 - 11:31:34 5570
Anarchist Mountain Observatory 11:16:33 -30.9 Dark Down 42.5 168.0 Up 11:01:33 - 11:31:33 5553
Manson/Chelan 11:16:39 -31.8 Dark Down 43.5 166.8 Up 11:01:39 - 11:31:39 5548
Tonasket 11:16:34 -31.0 Dark Down 42.8 167.9 Up 11:01:34 - 11:31:34 5544
Okanogan 11:16:36 -31.2 Dark Down 43.1 167.6 Up 11:01:36 - 11:31:36 5538
Wenatchee 11:16:44 -32.0 Dark Down 43.9 166.4 Up 11:01:44 - 11:31:44 5537
Brewster 11:16:39 -31.5 Dark Down 43.4 167.3 Up 11:01:39 - 11:31:39 5537
Ellensburg 11:16:48 -32.3 Dark Down 44.3 166.1 Up 11:01:48 - 11:31:48 5532
Yakima 11:16:49 -32.5 Dark Down 44.7 166.0 Up 11:01:49 - 11:31:49 5515
The Dalles 11:16:55 -33.3 Dark Down 45.6 164.9 Up 11:01:55 - 11:31:55 5506
Goldendale 11:16:53 -32.9 Dark Down 45.4 165.4 Up 11:01:53 - 11:31:53 5496
Toppenish/White Swan 11:16:50 -32.5 Dark Down 44.9 166.1 Up 11:01:50 - 11:31:50 5496
Maupin 11:16:56 -33.3 Dark Down 46.0 164.9 Up 11:01:56 - 11:31:56 5482
Sisters 11:17:04 -34.0 Dark Down 46.7 164.0 Up 11:02:04 - 11:32:04 5471
Redmond 11:17:01 -33.7 Dark Down 46.8 164.6 Up 11:02:01 - 11:32:01 5446
Bend 11:17:04 -33.9 Dark Down 47.0 164.3 Up 11:02:04 - 11:32:04 5445
Oregon Observatory 11:17:05 -34.0 Dark Down 47.2 164.1 Up 11:02:05 - 11:32:05 5445
La Pine/Gilchrist 11:17:05 -34.1 Dark Down 47.4 163.9 Up 11:02:05 - 11:32:05 5439
Pasco 11:16:45 -31.7 Dark Down 45.3 167.9 Up 11:01:45 - 11:31:45 5419
Chiloquin 11:17:12 -34.8 Dark Down 48.3 163.1 Up 11:02:12 - 11:32:12 5408
PNWRO 11:16:46 -31.6 Dark Down 45.5 168.1 Up 11:01:46 - 11:31:46 5395
Klamath Falls 11:17:17 -34.8 Dark Down 48.7 163.1 Up 11:02:17 - 11:32:17 5388
North Lake 11:17:05 -33.9 Dark Down 47.9 164.7 Up 11:02:05 - 11:32:05 5384
Paisley 11:17:08 -33.8 Dark Down 48.5 165.1 Up 11:02:08 - 11:32:08 5336
Fall River/Burney 11:17:18 -35.0 Dark Down 49.9 163.3 Up 11:02:18 - 11:32:18 5308
Lakeview 11:17:10 -33.9 Dark Down 49.0 165.2 Up 11:02:10 - 11:32:10 5300
Cedarville 11:17:12 -33.9 Dark Down 49.7 165.3 Up 11:02:12 - 11:32:12 5257
Greenville 11:17:24 -34.9 Dark Down 50.9 163.7 Up 11:02:24 - 11:32:24 5236
Susanville 11:17:19 -34.6 Dark Down 50.7 164.3 Up 11:02:19 - 11:32:19 5232
Gimple 11:17:24 -34.8 Dark Down 50.9 163.9 Up 11:02:24 - 11:32:24 5230
Quincy 11:17:24 -35.0 Dark Down 51.1 163.7 Up 11:02:24 - 11:32:24 5225
Portola 11:17:24 -34.7 Dark Down 51.3 164.4 Up 11:02:24 - 11:32:24 5189
Reno 11:17:21 -34.3 Dark Down 51.7 165.3 Up 11:02:21 - 11:32:21 5135
Carson City 11:17:22 -34.4 Dark Down 52.0 165.2 Up 11:02:22 - 11:32:22 5116
Gardnerville 11:17:23 -34.4 Dark Down 52.3 165.2 Up 11:02:23 - 11:32:23 5099
Yerington 11:17:21 -33.9 Dark Down 52.3 166.2 Up 11:02:21 - 11:32:21 5065
Lee Vining 11:17:26 -34.2 Dark Down 53.4 165.9 Up 11:02:26 - 11:32:26 5008
Hawthorne 11:17:22 -33.7 Dark Down 52.9 166.9 Up 11:02:22 - 11:32:22 5007
Sleaford 11:15:35 -22.0 Dark Up 39.9 185.7 Up 11:00:35 - 11:30:35 5002
CPSLO 11:17:46 -36.0 Dark Down 55.6 162.5 Up 11:02:46 - 11:32:46 4962
Bishop 11:17:27 -33.8 Dark Down 54.1 167.0 Up 11:02:27 - 11:32:27 4928
Tonopah 11:17:18 -32.7 Dark Down 53.6 169.1 Up 11:02:18 - 11:32:18 4891
Beatty 11:17:23 -32.6 Dark Up 54.8 169.6 Up 11:02:23 - 11:32:23 4796
Wildwood 11:17:44 -34.7 Dark Down 57.2 165.6 Up 11:02:44 - 11:32:44 4757
Indian Springs 11:17:20 -31.9 Dark Up 55.3 171.3 Up 11:02:20 - 11:32:20 4707
Henderson 11:17:20 -31.4 Dark Up 55.9 172.4 Up 11:02:20 - 11:32:20 4630
Idyllwild 11:17:38 -33.2 Dark Down 57.9 168.9 Up 11:02:38 - 11:32:38 4609
Laughlin/Bullhead City 11:17:22 -31.3 Dark Up 56.8 173.0 Up 11:02:22 - 11:32:22 4551
Mohave Valley 11:17:24 -31.3 Dark Up 57.0 173.0 Up 11:02:24 - 11:32:24 4534
Patrick 11:17:18 -30.7 Dark Up 56.6 174.3 Up 11:02:18 - 11:32:18 4519
Kingman/Dolan Springs 11:17:19 -30.9 Dark Up 56.8 174.0 Up 11:02:19 - 11:32:19 4518
Lake Havasu City 11:17:24 -31.2 Dark Up 57.5 173.4 Up 11:02:24 - 11:32:24 4493
Calipatria 11:17:35 -32.4 Dark Up 58.7 170.9 Up 11:02:35 - 11:32:35 4491
Parker 11:17:26 -31.2 Dark Up 57.8 173.4 Up 11:02:26 - 11:32:26 4470
Blythe 11:17:30 -31.5 Dark Up 58.3 172.8 Up 11:02:30 - 11:32:30 4458
Yuma 11:17:32 -31.7 Dark Up 59.2 172.5 Up 11:02:32 - 11:32:32 4403
George/Scottsdale 11:17:17 -29.3 Dark Up 58.4 177.9 Up 11:02:17 - 11:32:17 4279
Dunrhomin 11:16:20 -23.3 Dark Up 51.6 188.6 Up 11:01:20 - 11:31:20 4262

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 11VZ24, (2025/10/18 11:20UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  6.07  83
34Del Ori      05:32:00.4 -00:17:57  2.2  3.69  89
51 Ori         05:42:28.5 +01:28:28  4.9  0.67  86
PPM 149338     05:42:17.6 +02:22:01  6.7  0.32  86
PPM 149341     05:42:22.7 +01:52:37  9.1  0.31  86
11VZ24         05:43:07.8 +02:07:37 15.9        86
Positions are for J2000

Event circumstances last updated at 2021/11/27 00:58:59 UT

Marc W. Buie, Southwest Research Institute

RECON