RECON: TNO occultation with 532184

Event between (532184) 13OR11 and star GA1140:00561090 with event index number of 2449137

Geocentric closest approach at 2025/12/09 03:21:17 UTC

J2000 position of star is 03:55:40.8 +24:00:32
Equinox of date position of star is 03:57:00.7 +24:04:21
Stellar brightness G=13.0, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 72 degrees from the moon. Moon is 77% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 35.3 AU from the Sun and 34.3 AU from the Earth.
The TNO is moving 23.7 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 131 seconds.
The 1-sigma cross-track error in the shadow position is 2300 km.
The sky-plane scale is 24891.8 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 8.8 sec chord
Diameter=85.3 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 532184, (2025/12/09 03:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.7 +16:33:34  0.8 12.05  65
44Zet Per      03:55:46.1 +31:57:31  2.8  7.88  71
33 Tau         03:58:36.4 +23:14:56  6.0  0.89  72
PPM 093123     03:59:54.1 +24:09:13  7.6  0.61  72
PPM 093060     03:56:34.7 +24:01:56  9.7  0.16  73
532184         03:57:13.8 +24:04:59 13.0        72
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 26.7 km RECON observability=1.0 and success probability=9.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:23:10 -31.5 Dark Down 43.2 105.3 Up 03:11:47 - 03:34:32 5023
Victoria 03:23:22 -29.5 Dark Down 41.7 100.7 Up 03:12:00 - 03:34:45 4945
Kelowna 03:23:11 -32.1 Dark Down 43.9 105.4 Up 03:11:49 - 03:34:34 4934
Peachland 03:23:12 -31.9 Dark Down 43.8 105.1 Up 03:11:50 - 03:34:35 4934
Summerland 03:23:12 -32.0 Dark Down 43.9 105.0 Up 03:11:50 - 03:34:35 4920
Penticton 03:23:12 -32.0 Dark Down 44.0 105.0 Up 03:11:50 - 03:34:35 4911
Oliver 03:23:13 -32.1 Dark Down 44.1 104.7 Up 03:11:50 - 03:34:35 4884
Anarchist Mountain Observatory 03:23:14 -32.2 Dark Down 44.2 104.7 Up 03:11:51 - 03:34:36 4865
Tonasket 03:23:15 -32.2 Dark Down 44.3 104.4 Up 03:11:52 - 03:34:37 4842
Okanogan 03:23:16 -32.1 Dark Down 44.2 103.9 Up 03:11:54 - 03:34:39 4819
Brewster 03:23:17 -31.9 Dark Down 44.2 103.5 Up 03:11:55 - 03:34:40 4803
Manson/Chelan 03:23:18 -31.7 Dark Down 44.0 103.0 Up 03:11:55 - 03:34:40 4798
Sleaford 03:22:27 -40.1 Dark Up 50.8 121.7 Up 03:11:04 - 03:33:49 4767
Wenatchee 03:23:21 -31.6 Dark Down 44.0 102.4 Up 03:11:59 - 03:34:44 4764
Ellensburg 03:23:22 -31.4 Dark Down 43.9 101.8 Up 03:12:00 - 03:34:45 4738
Yakima 03:23:24 -31.4 Dark Down 44.0 101.4 Up 03:12:01 - 03:34:46 4705
Toppenish/White Swan 03:23:23 -31.5 Dark Down 44.2 101.4 Up 03:12:01 - 03:34:46 4682
Goldendale 03:23:26 -31.2 Dark Down 44.0 100.5 Up 03:12:04 - 03:34:49 4650
The Dalles 03:23:28 -31.0 Dark Down 43.8 100.0 Up 03:12:06 - 03:34:51 4643
PNWRO 03:23:22 -32.6 Dark Down 45.3 102.3 Up 03:11:59 - 03:34:44 4606
Maupin 03:23:29 -31.0 Dark Down 43.9 99.7 Up 03:12:06 - 03:34:51 4605
Sisters 03:23:33 -30.7 Dark Down 43.7 98.4 Up 03:12:10 - 03:34:55 4548
Bend 03:23:33 -30.8 Dark Down 44.0 98.4 Up 03:12:10 - 03:34:55 4520
Oregon Observatory 03:23:33 -30.7 Dark Down 43.9 98.2 Up 03:12:11 - 03:34:56 4509
North Lake 03:23:34 -31.1 Dark Down 44.4 98.0 Up 03:12:12 - 03:34:57 4438
Chiloquin 03:23:38 -30.4 Dark Down 43.8 96.6 Up 03:12:15 - 03:35:00 4412
Klamath Falls 03:23:39 -30.4 Dark Down 43.9 96.3 Up 03:12:17 - 03:35:02 4380
Lakeview 03:23:36 -31.4 Dark Down 44.9 97.4 Up 03:12:14 - 03:34:59 4330
Cedarville 03:23:38 -31.5 Dark Down 45.1 96.9 Up 03:12:15 - 03:35:00 4267
Fall River/Burney 03:23:42 -30.6 Dark Down 44.3 95.5 Up 03:12:19 - 03:35:04 4266
Susanville 03:23:42 -31.1 Dark Down 44.9 95.4 Up 03:12:20 - 03:35:05 4186
Greenville 03:23:44 -30.9 Dark Down 44.7 94.9 Up 03:12:21 - 03:35:06 4172
Gimple 03:23:43 -30.9 Dark Down 44.8 95.0 Up 03:12:21 - 03:35:06 4169
Quincy 03:23:44 -30.9 Dark Down 44.7 94.7 Up 03:12:22 - 03:35:07 4154
Portola 03:23:44 -31.2 Dark Down 45.1 94.9 Up 03:12:21 - 03:35:06 4127
Reno 03:23:43 -31.7 Dark Down 45.6 95.1 Up 03:12:20 - 03:35:05 4081
Carson City 03:23:44 -31.7 Dark Down 45.7 94.8 Up 03:12:21 - 03:35:06 4048
Gardnerville 03:23:44 -31.7 Dark Down 45.7 94.6 Up 03:12:22 - 03:35:07 4025
Yerington 03:23:43 -32.1 Dark Down 46.2 95.0 Up 03:12:20 - 03:35:05 4009
Hawthorne 03:23:43 -32.5 Dark Down 46.6 94.9 Up 03:12:21 - 03:35:06 3949
Lee Vining 03:23:46 -32.1 Dark Down 46.3 94.0 Up 03:12:23 - 03:35:08 3916
Tonopah 03:23:41 -33.6 Dark Down 47.8 95.4 Up 03:12:19 - 03:35:04 3859
Bishop 03:23:46 -32.6 Dark Down 46.9 93.8 Up 03:12:23 - 03:35:08 3836
Beatty 03:23:43 -33.9 Dark Down 48.2 94.4 Up 03:12:20 - 03:35:05 3737
Dunrhomin 03:23:04 -42.8 Dark Down 56.4 108.1 Up 03:11:42 - 03:34:27 3682
Indian Springs 03:23:41 -34.7 Dark Down 49.1 94.8 Up 03:12:19 - 03:35:04 3669
CU-SBO 03:23:06 -42.7 Dark Down 56.4 107.6 Up 03:11:43 - 03:34:28 3661
Henderson 03:23:41 -35.2 Dark Down 49.7 94.6 Up 03:12:18 - 03:35:03 3596
Wildwood 03:23:55 -32.1 Dark Down 46.9 90.2 Up 03:12:32 - 03:35:17 3541
Laughlin/Bullhead City 03:23:42 -35.5 Dark Down 50.1 93.9 Up 03:12:20 - 03:35:05 3499
Patrick 03:23:40 -36.1 Dark Down 50.7 94.6 Up 03:12:17 - 03:35:02 3498
Kingman/Dolan Springs 03:23:40 -35.9 Dark Down 50.6 94.2 Up 03:12:18 - 03:35:03 3484
Mohave Valley 03:23:43 -35.5 Dark Down 50.2 93.5 Up 03:12:20 - 03:35:05 3473
Idyllwild 03:23:51 -33.6 Dark Down 48.5 90.9 Up 03:12:28 - 03:35:13 3439
Lake Havasu City 03:23:43 -35.6 Dark Down 50.4 93.2 Up 03:12:20 - 03:35:05 3427
Parker 03:23:44 -35.6 Dark Down 50.4 92.8 Up 03:12:21 - 03:35:06 3392
Calipatria 03:23:49 -34.5 Dark Down 49.5 90.9 Up 03:12:27 - 03:35:12 3339
George/Scottsdale 03:23:38 -37.6 Dark Down 52.5 93.8 Up 03:12:16 - 03:35:01 3267
Yuma 03:23:48 -35.2 Dark Down 50.2 90.9 Up 03:12:25 - 03:35:10 3265

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 532184, (2025/12/09 03:21UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 12.05  65
44Zet Per      03:54:07.9 +31:53:01  2.8  7.88  71
33 Tau         03:57:03.9 +23:10:32  6.0  0.89  72
PPM 093123     03:58:20.9 +24:04:51  7.6  0.61  72
PPM 093060     03:55:01.7 +23:57:28  9.7  0.16  73
532184         03:55:40.8 +24:00:32 13.0        72
Positions are for J2000

Event circumstances last updated at 2022/04/11 23:08:04 UT

Marc W. Buie, Southwest Research Institute

RECON