RECON: TNO occultation with 469708

Event between (469708) 05GE187 and star GA0840:07802008 with event index number of 1465216

Geocentric closest approach at 2026/06/03 10:56:23 UTC

J2000 position of star is 18:16:40.3 -05:45:01
Equinox of date position of star is 18:17:51.0 -05:44:27
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 25 degrees from the moon. Moon is 92% illuminated.
TNO apparent brightness V=21.9

[RECON map]
TNO is 26.8 AU from the Sun and 25.9 AU from the Earth.
The TNO is moving 21.0 km/sec on the sky relative to the star, or, 4.0 arcsec/hr.
The 1-sigma error in the time of the event is 118 seconds.
The 1-sigma cross-track error in the shadow position is 1053 km.
The sky-plane scale is 18810.9 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=184.5 km assuming a 5% albedo -- 8.8 sec chord
Diameter=75.3 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 469708, (2026/06/03 10:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.9 -26:29:18  0.9 32.89  37
60Bet Oph      17:44:46.7 +04:33:29  2.8 13.23  38
PPM 201730     18:26:07.9 -07:03:35  6.5  2.40  22
PPM 201549     18:16:58.9 -05:27:54  7.4  0.39  25
PPM 201563     18:17:49.5 -05:42:44  9.7  0.07  25
469708         18:18:05.1 -05:44:21 16.4        24
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 21.1 km RECON observability=0.5 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:55:18 0.1 Sun up Up 24.7 219.7 Low 10:44:58 - 11:05:39 6343
Kamloops 10:55:56 -7.3 NT Up 30.6 204.9 Up 10:45:35 - 11:06:16 6170
Kelowna 10:55:51 -7.5 NT Up 31.1 206.1 Up 10:45:31 - 11:06:12 6131
Peachland 10:55:52 -7.8 NT Up 31.3 205.8 Up 10:45:32 - 11:06:13 6122
Summerland 10:55:51 -7.8 NT Up 31.4 205.9 Up 10:45:31 - 11:06:12 6114
Penticton 10:55:51 -7.8 NT Up 31.5 206.1 Up 10:45:30 - 11:06:11 6111
Oliver 10:55:50 -8.1 NT Up 31.8 206.2 Up 10:45:30 - 11:06:11 6090
Anarchist Mountain Observatory 10:55:49 -8.1 NT Up 31.9 206.4 Up 10:45:29 - 11:06:10 6083
Tonasket 10:55:49 -8.4 NT Up 32.2 206.4 Up 10:45:28 - 11:06:09 6063
Okanogan 10:55:49 -8.7 NT Up 32.5 206.4 Up 10:45:28 - 11:06:09 6042
Brewster 10:55:49 -9.0 NT Up 32.8 206.2 Up 10:45:29 - 11:06:10 6024
Victoria 10:56:01 -10.2 NT Up 33.4 202.0 Up 10:45:41 - 11:06:22 6017
Manson/Chelan 10:55:50 -9.3 NT Up 33.1 205.9 Up 10:45:29 - 11:06:10 6008
Wenatchee 10:55:49 -9.8 NT Up 33.6 205.8 Up 10:45:29 - 11:06:10 5977
Ellensburg 10:55:49 -10.2 NT Up 34.0 205.7 Up 10:45:29 - 11:06:10 5950
Yakima 10:55:48 -10.5 NT Up 34.4 205.8 Up 10:45:28 - 11:06:09 5924
Toppenish/White Swan 10:55:48 -10.6 NT Up 34.5 206.0 Up 10:45:27 - 11:06:08 5912
PNWRO 10:55:42 -10.2 NT Up 34.4 207.8 Up 10:45:21 - 11:06:02 5902
Goldendale 10:55:48 -11.2 NT Up 35.2 205.7 Up 10:45:28 - 11:06:09 5873
The Dalles 10:55:49 -11.5 NT Up 35.5 205.4 Up 10:45:29 - 11:06:10 5855
Maupin 10:55:48 -11.8 NT Up 35.8 205.6 Up 10:45:27 - 11:06:08 5829
Sisters 10:55:48 -12.7 AT Up 36.8 205.3 Up 10:45:27 - 11:06:08 5767
Bend 10:55:46 -12.8 AT Up 36.9 205.7 Up 10:45:26 - 11:06:07 5754
Oregon Observatory 10:55:47 -13.0 AT Up 37.1 205.6 Up 10:45:27 - 11:06:08 5741
North Lake 10:55:44 -13.2 AT Up 37.5 206.4 Up 10:45:23 - 11:06:04 5703
Chiloquin 10:55:46 -14.2 AT Up 38.4 205.5 Up 10:45:25 - 11:06:06 5647
Lakeview 10:55:40 -13.7 AT Up 38.3 207.4 Up 10:45:19 - 11:06:00 5635
Klamath Falls 10:55:45 -14.4 AT Up 38.7 205.7 Up 10:45:25 - 11:06:06 5624
Dunrhomin 10:54:44 -6.8 NT Up 33.2 224.7 Up 10:44:24 - 11:05:05 5621
Cedarville 10:55:38 -14.1 AT Up 38.8 207.9 Up 10:45:17 - 11:05:58 5591
Fall River/Burney 10:55:42 -15.1 AT Up 39.7 206.6 Up 10:45:21 - 11:06:02 5544
Susanville 10:55:38 -15.2 AT Up 40.0 207.7 Up 10:45:18 - 11:05:59 5506
Gimple 10:55:38 -15.5 AT Up 40.3 207.6 Up 10:45:17 - 11:05:58 5484
Greenville 10:55:38 -15.6 AT Up 40.3 207.5 Up 10:45:18 - 11:05:59 5483
Quincy 10:55:38 -15.7 AT Up 40.5 207.6 Up 10:45:17 - 11:05:58 5469
Portola 10:55:35 -15.6 AT Up 40.4 208.2 Up 10:45:15 - 11:05:56 5464
Reno 10:55:33 -15.4 AT Up 40.4 209.1 Up 10:45:13 - 11:05:54 5451
Carson City 10:55:33 -15.7 AT Up 40.7 209.2 Up 10:45:12 - 11:05:53 5425
Yerington 10:55:30 -15.5 AT Up 40.7 210.1 Up 10:45:09 - 11:05:50 5417
Gardnerville 10:55:32 -15.9 AT Up 40.9 209.4 Up 10:45:11 - 11:05:52 5407
Hawthorne 10:55:27 -15.6 AT Up 40.9 210.9 Up 10:45:07 - 11:05:48 5387
Tonopah 10:55:21 -15.2 AT Up 40.7 212.8 Up 10:45:00 - 11:05:41 5366
Lee Vining 10:55:28 -16.3 AT Up 41.5 210.6 Up 10:45:07 - 11:05:48 5341
Bishop 10:55:24 -16.3 AT Up 41.8 211.7 Up 10:45:03 - 11:05:44 5302
Beatty 10:55:17 -15.7 AT Up 41.5 213.9 Up 10:44:56 - 11:05:37 5282
Indian Springs 10:55:12 -15.4 AT Up 41.2 215.3 Up 10:44:51 - 11:05:32 5267
Henderson 10:55:08 -15.3 AT Up 41.4 216.3 Up 10:44:48 - 11:05:29 5232
Patrick 10:55:03 -15.1 AT Up 41.3 217.9 Up 10:44:43 - 11:05:24 5193
Kingman/Dolan Springs 10:55:03 -15.4 AT Up 41.6 217.8 Up 10:44:42 - 11:05:23 5174
Laughlin/Bullhead City 10:55:05 -15.7 AT Up 41.9 217.3 Up 10:44:45 - 11:05:26 5167
Mohave Valley 10:55:04 -15.9 AT Up 42.1 217.4 Up 10:44:44 - 11:05:25 5146
Lake Havasu City 10:55:03 -16.0 AT Up 42.3 217.9 Up 10:44:42 - 11:05:23 5116
Parker 10:55:02 -16.2 AT Up 42.5 218.1 Up 10:44:42 - 11:05:23 5088
George/Scottsdale 10:54:52 -15.0 AT Up 41.6 221.1 Up 10:44:31 - 11:05:12 5076
Wildwood 10:55:18 -18.8 Dark Up 44.6 213.1 Up 10:44:58 - 11:05:39 5043
Idyllwild 10:55:10 -17.9 AT Up 44.1 215.5 Up 10:44:50 - 11:05:31 5033
Calipatria 10:55:05 -17.7 AT Up 44.0 217.3 Up 10:44:45 - 11:05:26 4994
Yuma 10:55:01 -17.4 AT Up 43.9 218.6 Up 10:44:40 - 11:05:21 4968

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 469708, (2026/06/03 10:57UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 32.89  37
60Bet Oph      17:43:28.3 +04:34:06  2.8 13.23  38
PPM 201730     18:24:42.3 -07:04:34  6.5  2.40  22
PPM 201549     18:15:34.3 -05:28:31  7.4  0.39  25
PPM 201563     18:16:24.8 -05:43:23  9.7  0.07  25
469708         18:16:40.3 -05:45:01 16.4        24
Positions are for J2000

Event circumstances last updated at 2022/01/14 00:05:25 UT

Marc W. Buie, Southwest Research Institute

RECON