RECON: TNO occultation with 471272

Event between (471272) 11FY9 and star GA0880:04711336 with event index number of 2572537

Geocentric closest approach at 2026/05/05 09:58:22 UTC

J2000 position of star is 16:14:11.0 -00:58:02
Equinox of date position of star is 16:15:19.2 -01:01:17
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 34 degrees from the moon. Moon is 88% illuminated.
TNO apparent brightness V=23.3

[RECON map]
TNO is 27.1 AU from the Sun and 26.1 AU from the Earth.
The TNO is moving 24.2 km/sec on the sky relative to the star, or, 4.6 arcsec/hr.
The 1-sigma error in the time of the event is 112 seconds.
The 1-sigma cross-track error in the shadow position is 2035 km.
The sky-plane scale is 18964.2 km/arcsec.

The TNO has an absolute magnitude Hv=8.9
Diameter=97.7 km assuming a 5% albedo -- 4.0 sec chord
Diameter=39.9 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 471272, (2026/05/05 09:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.6 -26:29:17  0.9 25.73  16
1Del Oph       16:15:43.7 -03:45:36  2.7  2.73  32
PPM 199363     16:11:13.4 -03:32:03  5.0  2.72  33
PPM 179747     16:14:36.4 -01:28:05  8.4  0.49  34
PPM 179745     16:14:20.8 -00:57:17 10.3  0.31  34
471272         16:15:32.5 -01:01:55 15.9        34
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 14.3 km RECON observability=1.0 and success probability=14.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:58:54 -11.4 NT Up 33.4 208.6 Up 09:49:03 - 10:08:44 808
Kamloops 09:59:27 -17.9 AT Up 37.8 191.7 Up 09:49:36 - 10:09:17 331
Kelowna 09:59:23 -18.3 Dark Up 38.4 193.0 Up 09:49:33 - 10:09:14 311
Peachland 09:59:23 -18.5 Dark Up 38.6 192.6 Up 09:49:33 - 10:09:14 296
Summerland 09:59:23 -18.6 Dark Up 38.7 192.8 Up 09:49:33 - 10:09:14 290
Penticton 09:59:23 -18.6 Dark Up 38.8 192.9 Up 09:49:32 - 10:09:13 289
Oliver 09:59:22 -18.9 Dark Up 39.1 193.0 Up 09:49:32 - 10:09:13 269
Anarchist Mountain Observatory 09:59:21 -19.0 Dark Up 39.2 193.2 Up 09:49:31 - 10:09:12 265
Tonasket 09:59:21 -19.3 Dark Up 39.6 193.2 Up 09:49:30 - 10:09:11 244
Okanogan 09:59:21 -19.6 Dark Up 39.9 193.1 Up 09:49:30 - 10:09:11 220
Brewster 09:59:21 -19.9 Dark Up 40.2 192.9 Up 09:49:30 - 10:09:11 197
Dunrhomin 09:58:22 -19.5 Dark Up 43.3 214.2 Up 09:48:32 - 10:08:13 183
Manson/Chelan 09:59:21 -20.3 Dark Up 40.5 192.4 Up 09:49:31 - 10:09:12 173
Wenatchee 09:59:21 -20.7 Dark Up 41.0 192.3 Up 09:49:31 - 10:09:12 139
Victoria 09:59:31 -20.8 Dark Up 40.2 188.1 Up 09:49:41 - 10:09:22 111
Ellensburg 09:59:21 -21.1 Dark Up 41.4 192.1 Up 09:49:30 - 10:09:11 107
PNWRO 09:59:14 -21.4 Dark Up 42.1 194.4 Up 09:49:24 - 10:09:05 98
Yakima 09:59:20 -21.5 Dark Up 41.8 192.1 Up 09:49:30 - 10:09:11 81
Toppenish/White Swan 09:59:19 -21.6 Dark Up 42.0 192.4 Up 09:49:29 - 10:09:10 72
Goldendale 09:59:20 -22.3 Dark Up 42.6 191.9 Up 09:49:29 - 10:09:10 24
The Dalles 09:59:20 -22.6 Dark Up 42.8 191.5 Up 09:49:30 - 10:09:11 -3
Maupin 09:59:19 -22.9 Dark Up 43.2 191.7 Up 09:49:29 - 10:09:10 -26
Sisters 09:59:19 -23.8 Dark Up 44.2 191.2 Up 09:49:29 - 10:09:10 -100
Bend 09:59:18 -23.9 Dark Up 44.4 191.6 Up 09:49:27 - 10:09:08 -107
Oregon Observatory 09:59:18 -24.1 Dark Up 44.6 191.4 Up 09:49:28 - 10:09:09 -123
North Lake 09:59:15 -24.5 Dark Up 45.1 192.3 Up 09:49:25 - 10:09:06 -148
Lakeview 09:59:12 -25.2 Dark Up 46.1 193.3 Up 09:49:21 - 10:09:02 -201
Chiloquin 09:59:17 -25.4 Dark Up 45.9 191.1 Up 09:49:26 - 10:09:07 -226
Cedarville 09:59:10 -25.7 Dark Up 46.7 193.7 Up 09:49:20 - 10:09:01 -240
Klamath Falls 09:59:16 -25.7 Dark Up 46.2 191.3 Up 09:49:26 - 10:09:07 -247
Fall River/Burney 09:59:13 -26.6 Dark Up 47.3 192.1 Up 09:49:22 - 10:09:03 -316
Susanville 09:59:10 -26.8 Dark Up 47.8 193.3 Up 09:49:19 - 10:09:00 -335
Gimple 09:59:10 -27.1 Dark Up 48.1 193.1 Up 09:49:19 - 10:09:00 -362
Greenville 09:59:10 -27.2 Dark Up 48.2 192.9 Up 09:49:19 - 10:09:00 -365
Reno 09:59:05 -27.2 Dark Up 48.5 194.7 Up 09:49:15 - 10:08:56 -367
Portola 09:59:08 -27.2 Dark Up 48.4 193.7 Up 09:49:17 - 10:08:58 -371
Quincy 09:59:09 -27.3 Dark Up 48.3 193.0 Up 09:49:19 - 10:09:00 -379
Tonopah 09:58:54 -27.3 Dark Up 49.4 199.0 Up 09:49:04 - 10:08:45 -380
Yerington 09:59:02 -27.4 Dark Up 48.9 195.9 Up 09:49:12 - 10:08:53 -383
Carson City 09:59:04 -27.5 Dark Up 48.9 194.9 Up 09:49:14 - 10:08:55 -392
Hawthorne 09:58:59 -27.5 Dark Up 49.3 196.8 Up 09:49:09 - 10:08:50 -397
Gardnerville 09:59:04 -27.7 Dark Up 49.1 195.0 Up 09:49:13 - 10:08:54 -408
Indian Springs 09:58:46 -27.7 Dark Up 50.3 201.9 Up 09:48:56 - 10:08:37 -432
Henderson 09:58:43 -27.8 Dark Up 50.6 203.1 Up 09:48:52 - 10:08:33 -446
Beatty 09:58:50 -28.0 Dark Up 50.3 200.1 Up 09:49:00 - 10:08:41 -448
Patrick 09:58:38 -27.7 Dark Up 50.8 205.1 Up 09:48:47 - 10:08:28 -451
Lee Vining 09:59:00 -28.2 Dark Up 49.9 196.2 Up 09:49:10 - 10:08:51 -456
Bishop 09:58:57 -28.4 Dark Up 50.3 197.5 Up 09:49:06 - 10:08:47 -474
Kingman/Dolan Springs 09:58:38 -28.0 Dark Up 51.1 204.9 Up 09:48:47 - 10:08:28 -475
Laughlin/Bullhead City 09:58:40 -28.3 Dark Up 51.3 204.2 Up 09:48:49 - 10:08:30 -496
George/Scottsdale 09:58:27 -27.9 Dark Up 51.6 209.0 Up 09:48:37 - 10:08:18 -503
Mohave Valley 09:58:39 -28.5 Dark Up 51.5 204.3 Up 09:48:48 - 10:08:29 -516
Lake Havasu City 09:58:37 -28.7 Dark Up 51.8 204.9 Up 09:48:47 - 10:08:28 -537
Parker 09:58:36 -28.9 Dark Up 52.1 205.1 Up 09:48:46 - 10:08:27 -562
Idyllwild 09:58:44 -30.5 Dark Up 53.3 201.6 Up 09:48:53 - 10:08:34 -684
Yuma 09:58:34 -30.2 Dark Up 53.6 205.4 Up 09:48:44 - 10:08:25 -686
Calipatria 09:58:38 -30.3 Dark Up 53.5 203.8 Up 09:48:48 - 10:08:29 -687
Wildwood 09:58:51 -31.1 Dark Up 53.5 198.5 Up 09:49:00 - 10:08:41 -729

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 471272, (2026/05/05 09:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 25.73  16
1Del Oph       16:14:20.7 -03:41:43  2.7  2.73  32
PPM 199363     16:09:50.5 -03:28:00  5.0  2.72  33
PPM 179747     16:13:14.6 -01:24:09  8.4  0.49  34
PPM 179745     16:12:59.3 -00:53:21 10.3  0.31  34
471272         16:14:11.0 -00:58:02 15.9        34
Positions are for J2000

Event circumstances last updated at 2022/01/12 23:56:41 UT

Marc W. Buie, Southwest Research Institute

RECON