RECON: TNO occultation with 532184

Event between (532184) 13OR11 and star GA1140:00561090 with event index number of 1604663

Geocentric closest approach at 2025/12/09 03:08:52 UTC

J2000 position of star is 03:55:40.8 +24:00:32
Equinox of date position of star is 03:56:50.8 +24:03:53
Stellar brightness G=13.0, use SENSEUP=32
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 276 seconds.
The 1-sigma cross-track error in the shadow position is 4811 km.
The sky-plane scale is 24892.1 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 03:09UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.7 +16:33:35  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  72
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 3.3 sigma about the mid-time.
The median site spacing is 19.2 km RECON observability=1.0 and success probability=3.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 03:10:52 -30.2 Dark Down 42.0 102.7 Up 02:55:52 - 03:25:52 11180
Summerland 03:10:53 -30.0 Dark Down 41.9 102.2 Up 02:55:53 - 03:25:53 11165
Penticton 03:10:54 -30.1 Dark Down 42.0 102.3 Up 02:55:54 - 03:25:54 11157
Okanagan Falls 03:10:54 -30.0 Dark Down 42.0 102.1 Up 02:55:54 - 03:25:54 11143
Oliver 03:10:55 -30.0 Dark Down 42.1 102.0 Up 02:55:55 - 03:25:55 11129
Anarchist Mountain Observatory 03:10:54 -30.2 Dark Down 42.3 102.0 Up 02:55:54 - 03:25:54 11110
Oroville 03:10:56 -30.1 Dark Down 42.2 101.8 Up 02:55:56 - 03:25:56 11107
Tonasket 03:10:56 -30.1 Dark Down 42.3 101.6 Up 02:55:56 - 03:25:56 11088
Okanogan 03:10:58 -30.0 Dark Down 42.2 101.2 Up 02:55:58 - 03:25:58 11067
Brewster 03:10:59 -29.9 Dark Down 42.2 100.8 Up 02:55:59 - 03:25:59 11051
Manson/Chelan 03:11:00 -29.6 Dark Down 42.0 100.3 Up 02:56:00 - 03:26:00 11046
Wenatchee 03:11:01 -29.5 Dark Down 41.9 99.7 Up 02:56:01 - 03:26:01 11014
Ellensburg 03:11:04 -29.3 Dark Down 41.9 99.2 Up 02:56:04 - 03:26:04 10988
Yakima 03:11:05 -29.3 Dark Down 41.9 98.8 Up 02:56:05 - 03:26:05 10956
Toppenish/White Swan 03:11:05 -29.4 Dark Down 42.1 98.8 Up 02:56:05 - 03:26:05 10934
Goldendale 03:11:08 -29.1 Dark Down 41.9 98.0 Up 02:56:08 - 03:26:08 10903
The Dalles 03:11:09 -28.8 Dark Down 41.7 97.5 Up 02:56:09 - 03:26:09 10896
Pasco 03:11:04 -30.3 Dark Down 43.0 99.7 Up 02:56:04 - 03:26:04 10884
George/Umatilla 03:11:05 -30.1 Dark Down 42.9 99.2 Up 02:56:05 - 03:26:05 10864
Maupin 03:11:10 -28.9 Dark Down 41.8 97.2 Up 02:56:10 - 03:26:10 10859
PNWRO 03:11:05 -30.4 Dark Down 43.2 99.7 Up 02:56:05 - 03:26:05 10857
Madras/Culver 03:11:13 -28.8 Dark Down 41.8 96.7 Up 02:56:13 - 03:26:13 10816
Sisters 03:11:14 -28.5 Dark Down 41.5 96.0 Up 02:56:14 - 03:26:14 10803
Redmond 03:11:14 -28.8 Dark Down 41.8 96.3 Up 02:56:14 - 03:26:14 10788
Bend 03:11:14 -28.6 Dark Down 41.8 96.0 Up 02:56:14 - 03:26:14 10775
Oregon Observatory 03:11:15 -28.5 Dark Down 41.7 95.8 Up 02:56:15 - 03:26:15 10765
La Pine/Gilchrist 03:11:16 -28.5 Dark Down 41.7 95.5 Up 02:56:16 - 03:26:16 10750
North Lake 03:11:16 -28.9 Dark Down 42.1 95.6 Up 02:56:16 - 03:26:16 10694
Chiloquin 03:11:20 -28.1 Dark Down 41.5 94.3 Up 02:56:20 - 03:26:20 10670
Klamath Falls 03:11:20 -28.1 Dark Down 41.6 94.1 Up 02:56:20 - 03:26:20 10639
Paisley 03:11:17 -29.1 Dark Down 42.5 95.4 Up 02:56:17 - 03:26:17 10636
Tulelake 03:11:21 -28.3 Dark Down 41.8 94.0 Up 02:56:21 - 03:26:21 10606
Lakeview 03:11:19 -29.2 Dark Down 42.7 95.1 Up 02:56:19 - 03:26:19 10587
Fall River/Burney 03:11:23 -28.3 Dark Down 42.0 93.3 Up 02:56:23 - 03:26:23 10526
Cedarville 03:11:20 -29.3 Dark Down 42.8 94.6 Up 02:56:20 - 03:26:20 10526
Susanville 03:11:24 -28.8 Dark Down 42.6 93.2 Up 02:56:24 - 03:26:24 10447
Greenville 03:11:26 -28.5 Dark Down 42.4 92.8 Up 02:56:26 - 03:26:26 10433
Gimple 03:11:25 -28.6 Dark Down 42.4 92.8 Up 02:56:25 - 03:26:25 10430
Quincy 03:11:26 -28.5 Dark Down 42.4 92.6 Up 02:56:26 - 03:26:26 10416
Portola 03:11:26 -28.9 Dark Down 42.7 92.8 Up 02:56:26 - 03:26:26 10388
Reno 03:11:25 -29.3 Dark Down 43.3 93.0 Up 02:56:25 - 03:26:25 10342
Carson City 03:11:26 -29.3 Dark Down 43.3 92.7 Up 02:56:26 - 03:26:26 10310
Gardnerville 03:11:26 -29.3 Dark Down 43.3 92.5 Up 02:56:26 - 03:26:26 10287
Yerington 03:11:26 -29.8 Dark Down 43.8 92.9 Up 02:56:26 - 03:26:26 10271
Hawthorne 03:11:26 -30.1 Dark Down 44.2 92.8 Up 02:56:26 - 03:26:26 10212
Lee Vining 03:11:29 -29.7 Dark Down 43.9 92.0 Up 02:56:29 - 03:26:29 10179
Tonopah 03:11:24 -31.2 Dark Down 45.4 93.3 Up 02:56:24 - 03:26:24 10121
Bishop 03:11:29 -30.2 Dark Down 44.5 91.9 Up 02:56:29 - 03:26:29 10100
Lone Pine 03:11:30 -30.4 Dark Down 44.8 91.3 Up 02:56:30 - 03:26:30 10019
Beatty 03:11:27 -31.4 Dark Down 45.8 92.4 Up 02:56:27 - 03:26:27 10000
CPSLO 03:11:39 -28.1 Dark Down 42.7 88.6 Up 02:56:39 - 03:26:39 9996
Indian Springs 03:11:25 -32.2 Dark Down 46.7 92.8 Up 02:56:25 - 03:26:25 9932
SwRI 03:10:50 -40.4 Dark Down 54.1 104.7 Up 02:55:50 - 03:25:50 9909
Henderson 03:11:25 -32.7 Dark Down 47.3 92.6 Up 02:56:25 - 03:26:25 9859
Wildwood 03:11:36 -29.6 Dark Down 44.3 88.5 Up 02:56:36 - 03:26:36 9809
Searchlight/Boulder City 03:11:26 -32.7 Dark Down 47.3 92.0 Up 02:56:26 - 03:26:26 9803
Laughlin/Bullhead City 03:11:25 -33.0 Dark Down 47.6 91.9 Up 02:56:25 - 03:26:25 9764
Patrick 03:11:24 -33.6 Dark Down 48.2 92.6 Up 02:56:24 - 03:26:24 9761
Kingman/Dolan Springs 03:11:25 -33.4 Dark Down 48.0 92.3 Up 02:56:25 - 03:26:25 9747
Mohave Valley 03:11:26 -33.0 Dark Down 47.6 91.6 Up 02:56:26 - 03:26:26 9738
Idyllwild 03:11:34 -31.1 Dark Down 45.9 89.2 Up 02:56:34 - 03:26:34 9707
Lake Havasu City 03:11:27 -33.1 Dark Down 47.9 91.3 Up 02:56:27 - 03:26:27 9691
Parker 03:11:28 -33.1 Dark Down 47.9 91.0 Up 02:56:28 - 03:26:28 9657
Blythe 03:11:30 -32.8 Dark Down 47.7 90.2 Up 02:56:30 - 03:26:30 9619
Calipatria 03:11:33 -32.0 Dark Down 46.9 89.2 Up 02:56:33 - 03:26:33 9606
Yuma 03:11:32 -32.7 Dark Down 47.6 89.2 Up 02:56:32 - 03:26:32 9533

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 03:09UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 12.05  65
44Zet Per      03:54:07.9 +31:53:01  2.8  7.88  71
33 Tau         03:57:03.8 +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  72
532184         03:55:40.8 +24:00:32 13.0        72
Positions are for J2000

Event circumstances last updated at 2019/07/08 22:54:57 UT

Marc W. Buie, Southwest Research Institute

RECON