RECON: TNO occultation with 5145

Event between (5145) Pholus and star GA0740:23691929 with event index number of 1493329

Geocentric closest approach at 2026/06/08 08:36:01 UTC

J2000 position of star is 18:48:11.7 -14:27:15
Equinox of date position of star is 18:49:18.1 -14:25:53
Stellar brightness G=15.4, use SENSEUP=128
Star is 65 degrees from the moon. Moon is 51% illuminated.
TNO apparent brightness V=22.0

[RECON map]
TNO is 30.6 AU from the Sun and 29.7 AU from the Earth.
The TNO is moving 23.3 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 249 seconds.
The 1-sigma cross-track error in the shadow position is 2241 km.
The sky-plane scale is 21515.8 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.8 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 5145, (2026/06/08 08:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.0 -26:29:18  0.9 34.51  97
Nunki          18:56:54.1 -26:15:41  2.0 11.96  65
PPM 235105     18:52:00.8 -13:32:23  6.5  1.05  65
PPM 235043     18:49:42.1 -14:40:38  7.1  0.25  65
PPM 235028     18:49:12.3 -14:29:31  9.3  0.14  65
5145           18:49:41.9 -14:25:23 15.4        65
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 3.6 sigma about the mid-time.
The median site spacing is 12.8 km RECON observability=1.0 and success probability=13.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:36:32 -16.7 AT Up 24.2 163.5 Low 08:21:32 - 08:51:32 634
Summerland 08:36:33 -17.0 AT Up 24.4 163.1 Low 08:21:33 - 08:51:33 620
Penticton 08:36:33 -17.1 AT Up 24.5 163.2 Low 08:21:33 - 08:51:33 616
Okanagan Falls 08:36:33 -17.3 AT Up 24.7 163.2 Low 08:21:33 - 08:51:33 607
Oliver 08:36:33 -17.4 AT Up 24.9 163.2 Low 08:21:33 - 08:51:33 599
Anarchist Mountain Observatory 08:36:33 -17.6 AT Up 25.1 163.4 Low 08:21:33 - 08:51:33 591
Oroville 08:36:33 -17.7 AT Up 25.1 163.3 Low 08:21:33 - 08:51:33 587
Tonasket 08:36:33 -17.9 AT Up 25.3 163.3 Low 08:21:33 - 08:51:33 576
Okanogan 08:36:34 -18.2 Dark Up 25.6 163.1 Low 08:21:34 - 08:51:34 559
Brewster 08:36:35 -18.5 Dark Up 25.9 162.8 Low 08:21:35 - 08:51:35 546
Manson/Chelan 08:36:37 -18.8 Dark Up 26.0 162.4 Low 08:21:37 - 08:51:37 535
Entiat 08:36:37 -19.0 Dark Up 26.2 162.3 Low 08:21:37 - 08:51:37 524
Wenatchee 08:36:38 -19.3 Dark Up 26.4 162.1 Low 08:21:38 - 08:51:38 511
Ellensburg 08:36:39 -19.7 Dark Up 26.7 161.9 Low 08:21:39 - 08:51:39 489
Yakima 08:36:39 -20.1 Dark Up 27.1 161.8 Low 08:21:39 - 08:51:39 468
Toppenish/White Swan 08:36:39 -20.3 Dark Up 27.4 161.9 Low 08:21:39 - 08:51:39 456
Pasco 08:36:35 -20.3 Dark Up 27.8 163.2 Low 08:21:35 - 08:51:35 450
PNWRO 08:36:35 -20.5 Dark Up 28.0 163.4 Low 08:21:35 - 08:51:35 437
George/Umatilla 08:36:36 -20.6 Dark Up 28.0 163.0 Low 08:21:36 - 08:51:36 432
Goldendale 08:36:41 -20.9 Dark Up 27.8 161.4 Low 08:21:41 - 08:51:41 426
The Dalles 08:36:42 -21.1 Dark Up 27.9 161.0 Low 08:21:42 - 08:51:42 414
Maupin 08:36:43 -21.5 Dark Up 28.4 161.0 Low 08:21:43 - 08:51:43 391
Madras/Culver 08:36:43 -22.1 Dark Up 28.9 160.9 Low 08:21:43 - 08:51:43 360
Sisters 08:36:45 -22.5 Dark Up 29.1 160.3 Low 08:21:45 - 08:51:45 341
Redmond 08:36:44 -22.4 Dark Up 29.2 160.7 Low 08:21:44 - 08:51:44 340
Bend 08:36:45 -22.7 Dark Up 29.4 160.6 Low 08:21:45 - 08:51:45 328
Oregon Observatory 08:36:45 -22.9 Dark Up 29.5 160.4 Low 08:21:45 - 08:51:45 318
La Pine/Gilchrist 08:36:46 -23.1 Dark Up 29.7 160.3 Low 08:21:46 - 08:51:46 306
North Lake 08:36:44 -23.4 Dark Up 30.2 160.8 Up 08:21:44 - 08:51:44 281
Paisley 08:36:44 -23.9 Dark Up 30.8 161.1 Up 08:21:44 - 08:51:44 248
Chiloquin 08:36:48 -24.2 Dark Up 30.6 159.7 Up 08:21:48 - 08:51:48 240
Klamath Falls 08:36:48 -24.5 Dark Up 31.0 159.7 Up 08:21:48 - 08:51:48 220
Lakeview 08:36:44 -24.4 Dark Up 31.4 161.2 Up 08:21:44 - 08:51:44 218
Tulelake 08:36:48 -24.8 Dark Up 31.3 160.0 Up 08:21:48 - 08:51:48 204
Cedarville 08:36:44 -25.0 Dark Up 32.0 161.3 Up 08:21:44 - 08:51:44 178
Fall River/Burney 08:36:48 -25.7 Dark Up 32.2 159.9 Up 08:21:48 - 08:51:48 148
Susanville 08:36:47 -26.2 Dark Up 33.0 160.6 Up 08:21:47 - 08:51:47 109
Greenville 08:36:48 -26.5 Dark Up 33.1 160.2 Up 08:21:48 - 08:51:48 91
Gimple 08:36:48 -26.5 Dark Up 33.2 160.3 Up 08:21:48 - 08:51:48 91
Quincy 08:36:48 -26.7 Dark Up 33.3 160.1 Up 08:21:48 - 08:51:48 78
Portola 08:36:47 -26.8 Dark Up 33.6 160.6 Up 08:21:47 - 08:51:47 71
Reno 08:36:45 -27.0 Dark Up 34.0 161.3 Up 08:21:45 - 08:51:45 54
Niwot 08:35:52 -23.2 Dark Up 35.4 178.2 Up 08:20:52 - 08:50:52 53
SwRI 08:35:52 -23.3 Dark Up 35.5 178.1 Up 08:20:52 - 08:50:52 47
Carson City 08:36:45 -27.3 Dark Up 34.3 161.2 Up 08:21:45 - 08:51:45 30
Yerington 08:36:43 -27.4 Dark Up 34.7 161.9 Up 08:21:43 - 08:51:43 18
Gardnerville 08:36:45 -27.5 Dark Up 34.6 161.2 Up 08:21:45 - 08:51:45 14
Hawthorne 08:36:41 -27.8 Dark Up 35.2 162.4 Up 08:21:41 - 08:51:41 -13
Tonopah 08:36:37 -28.0 Dark Up 36.0 163.9 Up 08:21:37 - 08:51:37 -45
Lee Vining 08:36:44 -28.4 Dark Up 35.7 161.7 Up 08:21:44 - 08:51:44 -50
Bishop 08:36:42 -28.9 Dark Up 36.4 162.4 Up 08:21:42 - 08:51:42 -91
Beatty 08:36:36 -29.1 Dark Up 37.2 164.2 Up 08:21:36 - 08:51:36 -123
Lone Pine 08:36:41 -29.6 Dark Up 37.2 162.7 Up 08:21:41 - 08:51:41 -143
Indian Springs 08:36:32 -29.2 Dark Up 37.8 165.4 Up 08:21:32 - 08:51:32 -147
Henderson 08:36:30 -29.6 Dark Up 38.4 166.2 Up 08:21:30 - 08:51:30 -185
Searchlight/Boulder City 08:36:30 -30.1 Dark Up 39.0 166.1 Up 08:21:30 - 08:51:30 -226
Patrick 08:36:26 -29.9 Dark Up 39.2 167.4 Up 08:21:26 - 08:51:26 -231
CPSLO 08:36:52 -31.2 Dark Up 37.8 159.3 Up 08:21:52 - 08:51:52 -234
Kingman/Dolan Springs 08:36:27 -30.2 Dark Up 39.4 167.1 Up 08:21:27 - 08:51:27 -247
Laughlin/Bullhead City 08:36:29 -30.3 Dark Up 39.3 166.5 Up 08:21:29 - 08:51:29 -247
DCO 08:36:24 -30.0 Dark Up 39.7 168.2 Up 08:21:24 - 08:51:24 -255
Mohave Valley 08:36:30 -30.6 Dark Up 39.6 166.4 Up 08:21:30 - 08:51:30 -267
Lake Havasu City 08:36:29 -30.9 Dark Up 40.0 166.7 Up 08:21:29 - 08:51:29 -296
Wildwood 08:36:45 -32.1 Dark Up 39.5 161.4 Up 08:21:45 - 08:51:45 -321
Parker 08:36:29 -31.2 Dark Up 40.4 166.6 Up 08:21:29 - 08:51:29 -322
Idyllwild 08:36:39 -32.1 Dark Up 40.3 163.6 Up 08:21:39 - 08:51:39 -348
Blythe 08:36:31 -31.8 Dark Up 40.8 166.2 Up 08:21:31 - 08:51:31 -360
Calipatria 08:36:34 -32.5 Dark Up 41.1 164.9 Up 08:21:34 - 08:51:34 -394
Yuma 08:36:31 -32.7 Dark Up 41.7 165.9 Up 08:21:31 - 08:51:31 -428

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 5145, (2026/06/08 08:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.51  97
Nunki          18:55:15.9 -26:17:49  2.0 11.96  65
PPM 235105     18:50:31.2 -13:34:20  6.5  1.05  65
PPM 235043     18:48:11.7 -14:42:31  7.1  0.25  65
PPM 235028     18:47:42.1 -14:31:22  9.3  0.14  65
5145           18:48:11.7 -14:27:15 15.4        65
Positions are for J2000

Event circumstances last updated at 2019/06/11 22:37:36 UT

Marc W. Buie, Southwest Research Institute

RECON