RECON: TNO occultation with 532184

Event between (532184) 13OR11 and star GA1140:00584802 with event index number of 1604658

Geocentric closest approach at 2025/10/22 12:17:38 UTC

J2000 position of star is 04:00:22.9 +24:07:10
Equinox of date position of star is 04:01:33.1 +24:10:24
Stellar brightness G=15.9, use SENSEUP=128
Star is 157 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 35.2 AU from the Sun and 34.4 AU from the Earth.
The TNO is moving 19.9 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 352 seconds.
The 1-sigma cross-track error in the shadow position is 4727 km.
The sky-plane scale is 24937.3 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 10.5 sec chord
Diameter=85.3 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 532184, (2025/10/22 12:18UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:24.3 +16:33:34  0.8 11.28 149
44Zet Per      03:55:45.7 +31:57:29  2.8  7.89 156
36 Tau         04:05:54.6 +24:10:30  6.1  0.91 156
PPM 093123     03:59:53.6 +24:09:12  7.6  0.47 158
532184         04:01:55.7 +24:11:26 15.9       157
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 2.6 sigma about the mid-time.
The median site spacing is 23.1 km RECON observability=1.0 and success probability=9.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 12:15:32 -22.4 Dark Down 52.2 240.2 Up 12:00:32 - 12:30:32 -101
Summerland 12:15:32 -22.7 Dark Down 52.6 240.2 Up 12:00:32 - 12:30:32 -134
Penticton 12:15:32 -22.6 Dark Down 52.5 240.4 Up 12:00:32 - 12:30:32 -139
Okanagan Falls 12:15:32 -22.7 Dark Down 52.6 240.6 Up 12:00:32 - 12:30:32 -157
Oliver 12:15:31 -22.7 Dark Down 52.7 240.8 Up 12:00:31 - 12:30:31 -173
Anarchist Mountain Observatory 12:15:30 -22.6 Dark Down 52.7 241.2 Up 12:00:30 - 12:30:30 -186
Oroville 12:15:30 -22.6 Dark Down 52.8 241.2 Up 12:00:30 - 12:30:30 -195
Tonasket 12:15:30 -22.7 Dark Down 52.9 241.5 Up 12:00:30 - 12:30:30 -217
Okanogan 12:15:30 -22.8 Dark Down 53.1 241.7 Up 12:00:30 - 12:30:30 -252
Brewster 12:15:29 -23.0 Dark Down 53.4 241.8 Up 12:00:29 - 12:30:29 -282
Manson/Chelan 12:15:30 -23.3 Dark Down 53.7 241.6 Up 12:00:30 - 12:30:30 -307
Wenatchee 12:15:30 -23.5 Dark Down 54.0 242.0 Up 12:00:30 - 12:30:30 -356
Ellensburg 12:15:30 -23.7 Dark Down 54.3 242.2 Up 12:00:30 - 12:30:30 -400
Yakima 12:15:29 -23.8 Dark Down 54.5 242.7 Up 12:00:29 - 12:30:29 -441
Pasco 12:15:24 -22.8 Dark Down 53.8 244.7 Up 12:00:24 - 12:30:24 -453
Toppenish/White Swan 12:15:28 -23.7 Dark Down 54.5 243.1 Up 12:00:28 - 12:30:28 -460
PNWRO 12:15:22 -22.7 Dark Down 53.8 245.3 Up 12:00:22 - 12:30:22 -474
George/Umatilla 12:15:23 -23.0 Dark Down 54.1 244.9 Up 12:00:23 - 12:30:23 -489
Goldendale 12:15:28 -24.1 Dark Down 55.0 243.4 Up 12:00:28 - 12:30:28 -521
The Dalles 12:15:29 -24.3 Dark Down 55.4 243.2 Up 12:00:29 - 12:30:29 -549
Maupin 12:15:28 -24.3 Dark Down 55.5 243.9 Up 12:00:28 - 12:30:28 -589
Madras/Culver 12:15:27 -24.4 Dark Down 55.8 244.5 Up 12:00:27 - 12:30:27 -645
Redmond 12:15:26 -24.5 Dark Down 55.9 245.0 Up 12:00:26 - 12:30:26 -682
Sisters 12:15:28 -24.8 Dark Down 56.2 244.5 Up 12:00:28 - 12:30:28 -685
Bend 12:15:26 -24.7 Dark Down 56.1 245.1 Up 12:00:26 - 12:30:26 -705
Oregon Observatory 12:15:26 -24.8 Dark Down 56.3 245.2 Up 12:00:26 - 12:30:26 -725
La Pine/Gilchrist 12:15:26 -24.9 Dark Down 56.4 245.4 Up 12:00:26 - 12:30:26 -747
North Lake 12:15:23 -24.5 Dark Down 56.2 246.6 Up 12:00:23 - 12:30:23 -782
SwRI 12:14:27 -13.1 AT Down 45.8 264.4 Up 11:59:27 - 12:29:27 -801
Paisley 12:15:21 -24.3 Dark Down 56.2 247.8 Up 12:00:21 - 12:30:21 -832
Chiloquin 12:15:26 -25.3 Dark Down 57.1 246.5 Up 12:00:26 - 12:30:26 -865
Lakeview 12:15:20 -24.2 Dark Down 56.2 248.7 Up 12:00:20 - 12:30:20 -881
Klamath Falls 12:15:25 -25.3 Dark Down 57.2 247.1 Up 12:00:25 - 12:30:25 -899
Tulelake 12:15:23 -25.1 Dark Down 57.1 247.8 Up 12:00:23 - 12:30:23 -922
Cedarville 12:15:18 -24.2 Dark Down 56.3 249.8 Up 12:00:18 - 12:30:18 -945
Fall River/Burney 12:15:21 -25.2 Dark Down 57.4 249.2 Up 12:00:21 - 12:30:21 -1014
Susanville 12:15:17 -24.7 Dark Down 57.1 250.9 Up 12:00:17 - 12:30:17 -1068
Gimple 12:15:17 -24.9 Dark Down 57.3 251.1 Up 12:00:17 - 12:30:17 -1100
Greenville 12:15:18 -24.9 Dark Down 57.4 251.0 Up 12:00:18 - 12:30:18 -1101
Quincy 12:15:17 -24.9 Dark Down 57.4 251.3 Up 12:00:17 - 12:30:17 -1122
Portola 12:15:16 -24.6 Dark Down 57.1 252.0 Up 12:00:16 - 12:30:16 -1127
Reno 12:15:13 -24.1 Dark Down 56.7 253.0 Up 12:00:13 - 12:30:13 -1144
Carson City 12:15:12 -24.2 Dark Down 56.8 253.5 Up 12:00:12 - 12:30:12 -1181
Yerington 12:15:10 -23.7 Dark Down 56.4 254.4 Up 12:00:10 - 12:30:10 -1190
Gardnerville 12:15:11 -24.1 Dark Down 56.9 253.9 Up 12:00:11 - 12:30:11 -1206
Hawthorne 12:15:07 -23.3 Dark Down 56.1 255.6 Up 12:00:07 - 12:30:07 -1229
Tonopah 12:15:01 -22.3 Dark Down 55.2 257.5 Up 12:00:01 - 12:30:01 -1252
Lee Vining 12:15:07 -23.7 Dark Down 56.7 255.9 Up 12:00:07 - 12:30:07 -1297
Bishop 12:15:04 -23.2 Dark Down 56.2 257.5 Up 12:00:04 - 12:30:04 -1346
Beatty 12:14:57 -22.0 Dark Down 55.1 259.5 Up 11:59:57 - 12:29:57 -1364
Indian Springs 12:14:53 -21.1 Dark Down 54.3 260.8 Up 11:59:53 - 12:29:53 -1377
Henderson 12:14:50 -20.6 Dark Down 53.8 262.0 Up 11:59:50 - 12:29:50 -1419
Lone Pine 12:15:02 -23.0 Dark Down 56.1 258.8 Up 12:00:02 - 12:30:02 -1420
Patrick 12:14:45 -19.7 Dark Down 53.0 263.6 Up 11:59:45 - 12:29:45 -1462
Searchlight/Boulder City 12:14:48 -20.6 Dark Down 53.9 262.8 Up 11:59:48 - 12:29:48 -1478
Kingman/Dolan Springs 12:14:45 -19.9 Dark Down 53.2 263.8 Up 11:59:45 - 12:29:45 -1489
Laughlin/Bullhead City 12:14:46 -20.3 Dark Down 53.6 263.5 Up 11:59:46 - 12:29:46 -1502
Mohave Valley 12:14:46 -20.3 Dark Down 53.7 263.8 Up 11:59:46 - 12:29:46 -1530
Lake Havasu City 12:14:45 -20.1 Dark Down 53.5 264.5 Up 11:59:45 - 12:29:45 -1567
CPSLO 12:15:10 -25.2 Dark Down 58.4 258.7 Up 12:00:10 - 12:30:10 -1603
Parker 12:14:44 -20.1 Dark Down 53.5 265.0 Up 11:59:44 - 12:29:44 -1603
Blythe 12:14:44 -20.3 Dark Down 53.8 265.6 Up 11:59:44 - 12:29:44 -1665
Wildwood 12:15:00 -23.6 Dark Down 57.0 262.2 Up 12:00:00 - 12:30:00 -1694
Idyllwild 12:14:52 -22.0 Dark Down 55.5 264.0 Up 11:59:52 - 12:29:52 -1696
Calipatria 12:14:46 -21.1 Dark Down 54.6 265.6 Up 11:59:46 - 12:29:46 -1736
Yuma 12:14:43 -20.3 Dark Down 53.9 266.8 Up 11:59:43 - 12:29:43 -1763

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, (2025/10/22 12:18UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 11.28 149
44Zet Per      03:54:07.9 +31:53:01  2.8  7.89 156
36 Tau         04:04:21.7 +24:06:21  6.1  0.91 156
PPM 093123     03:58:20.9 +24:04:51  7.6  0.47 158
532184         04:00:22.9 +24:07:10 15.9       157
Positions are for J2000

Event circumstances last updated at 2019/07/08 22:46:55 UT

Marc W. Buie, Southwest Research Institute

RECON