RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:33024249 with event index number of 2273591

Geocentric closest approach at 2026/05/27 08:24:39 UTC

J2000 position of star is 18:06:36.5 -28:03:07
Equinox of date position of star is 18:08:02.9 -28:02:53
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 70 degrees from the moon. Moon is 86% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 32.0 AU from the Sun and 31.1 AU from the Earth.
The TNO is moving 20.2 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 137 seconds.
The 1-sigma cross-track error in the shadow position is 1388 km.
The sky-plane scale is 22582.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=346.7 km assuming a 5% albedo -- 14.8 sec chord
Diameter=141.6 km assuming a 30% albedo -- 6.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470593, (2026/05/27 08:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.8 -26:29:18  0.9 21.63  48
Nunki          18:56:54.0 -26:15:41  2.0 10.96  81
PPM 267912     18:09:45.3 -28:27:06  4.6  0.52  70
PPM 267868     18:08:26.0 -28:21:33  7.7  0.31  70
PPM 267842     18:07:34.6 -27:47:05  8.9  0.30  69
470593         18:08:16.4 -28:02:50 16.3        70
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 19.1 km RECON observability=0.4 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 08:24:18 -14.4 AT Up 9.7 174.1 Really Low 08:12:24 - 08:36:12 8223
Kamloops 08:25:08 -17.8 AT Up 9.1 161.5 Really Low 08:13:14 - 08:37:02 8219
Kelowna 08:25:05 -18.5 Dark Up 10.1 162.2 Really Low 08:13:11 - 08:36:59 8204
Peachland 08:25:07 -18.6 Dark Up 10.1 161.9 Really Low 08:13:13 - 08:37:01 8202
Summerland 08:25:07 -18.8 Dark Up 10.3 162.0 Really Low 08:13:13 - 08:37:01 8198
Penticton 08:25:07 -18.8 Dark Up 10.4 162.1 Really Low 08:13:13 - 08:37:01 8197
Oliver 08:25:06 -19.2 Dark Up 10.7 162.1 Really Low 08:13:12 - 08:37:00 8189
Anarchist Mountain Observatory 08:25:07 -19.3 Dark Up 10.9 162.3 Really Low 08:13:13 - 08:37:01 8186
Okanogan 08:25:08 -20.0 Dark Up 11.5 162.0 Really Low 08:13:14 - 08:37:02 8170
Brewster 08:25:10 -20.3 Dark Up 11.7 161.8 Really Low 08:13:16 - 08:37:04 8163
Victoria 08:25:22 -20.1 Dark Up 10.5 158.7 Really Low 08:13:28 - 08:37:16 8161
Manson/Chelan 08:25:12 -20.5 Dark Up 11.8 161.5 Really Low 08:13:18 - 08:37:06 8157
Wenatchee 08:25:12 -21.0 Dark Up 12.3 161.3 Really Low 08:13:18 - 08:37:06 8144
Ellensburg 08:25:14 -21.4 Dark Up 12.6 161.1 Really Low 08:13:20 - 08:37:08 8133
Yakima 08:25:15 -21.8 Dark Up 13.0 161.1 Really Low 08:13:21 - 08:37:09 8122
Toppenish/White Swan 08:25:14 -22.0 Dark Up 13.2 161.2 Really Low 08:13:20 - 08:37:08 8116
PNWRO 08:25:10 -22.3 Dark Up 13.9 162.5 Really Low 08:13:16 - 08:37:04 8109
The Dalles 08:25:19 -22.9 Dark Up 13.8 160.5 Really Low 08:13:25 - 08:37:13 8091
Maupin 08:25:19 -23.3 Dark Up 14.2 160.5 Really Low 08:13:25 - 08:37:13 8079
Sisters 08:25:22 -24.2 Dark Up 14.9 160.0 Really Low 08:13:28 - 08:37:16 8051
Bend 08:25:22 -24.4 Dark Up 15.2 160.2 Really Low 08:13:28 - 08:37:16 8044
Oregon Observatory 08:25:22 -24.6 Dark Up 15.3 160.1 Really Low 08:13:28 - 08:37:16 8038
Chiloquin 08:25:26 -25.9 Dark Up 16.5 159.6 Really Low 08:13:32 - 08:37:20 7992
Klamath Falls 08:25:27 -26.3 Dark Up 16.8 159.7 Really Low 08:13:33 - 08:37:21 7980
Cedarville 08:25:22 -26.8 Dark Up 17.9 161.0 Really Low 08:13:28 - 08:37:16 7961
Fall River/Burney 08:25:26 -27.4 Dark Up 18.0 159.9 Really Low 08:13:32 - 08:37:20 7938
Gimple 08:25:27 -28.3 Dark Up 19.0 160.2 Really Low 08:13:33 - 08:37:21 7905
Greenville 08:25:27 -28.3 Dark Up 19.0 160.2 Really Low 08:13:33 - 08:37:21 7905
Quincy 08:25:27 -28.5 Dark Up 19.2 160.1 Really Low 08:13:33 - 08:37:21 7897
Portola 08:25:26 -28.6 Dark Up 19.4 160.5 Really Low 08:13:32 - 08:37:20 7894
Reno 08:25:24 -28.8 Dark Up 19.8 161.1 Really Low 08:13:30 - 08:37:18 7885
Dunrhomin 08:24:24 -25.2 Dark Up 21.5 174.5 Low 08:12:30 - 08:36:18 7877
Carson City 08:25:24 -29.1 Dark Up 20.2 161.1 Low 08:13:30 - 08:37:18 7870
CU-SBO 08:24:24 -25.5 Dark Up 21.7 174.4 Low 08:12:30 - 08:36:18 7868
Yerington 08:25:22 -29.2 Dark Up 20.5 161.6 Low 08:13:28 - 08:37:16 7864
Gardnerville 08:25:24 -29.3 Dark Up 20.4 161.1 Low 08:13:30 - 08:37:18 7860
Hawthorne 08:25:20 -29.6 Dark Up 21.1 162.0 Low 08:13:26 - 08:37:14 7845
Lee Vining 08:25:23 -30.3 Dark Up 21.5 161.5 Low 08:13:29 - 08:37:17 7821
Bishop 08:25:20 -30.8 Dark Up 22.2 162.1 Low 08:13:26 - 08:37:14 7795
Beatty 08:25:15 -31.0 Dark Up 23.1 163.5 Low 08:13:21 - 08:37:09 7776
Patrick 08:25:04 -31.9 Dark Up 25.1 166.0 Low 08:13:10 - 08:36:58 7705
Laughlin/Bullhead City 08:25:08 -32.3 Dark Up 25.2 165.3 Low 08:13:14 - 08:37:02 7694
Lake Havasu City 08:25:08 -32.9 Dark Up 25.9 165.5 Low 08:13:14 - 08:37:02 7661
Wildwood 08:25:26 -34.0 Dark Up 25.3 161.5 Low 08:13:32 - 08:37:20 7640
Idyllwild 08:25:19 -34.1 Dark Up 26.1 163.2 Low 08:13:25 - 08:37:13 7625
George/Scottsdale 08:24:57 -33.1 Dark Up 27.1 167.8 Low 08:13:03 - 08:36:51 7617
Calipatria 08:25:13 -34.5 Dark Up 27.0 164.2 Low 08:13:19 - 08:37:07 7593
Yuma 08:25:11 -34.7 Dark Up 27.6 165.0 Low 08:13:17 - 08:37:05 7569

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 470593, (2026/05/27 08:25UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.63  48
Nunki          18:55:15.9 -26:17:49  2.0 10.96  81
PPM 267912     18:08:05.0 -28:27:26  4.6  0.52  70
PPM 267868     18:06:45.8 -28:21:50  7.7  0.31  70
PPM 267842     18:05:54.9 -27:47:21  8.9  0.30  69
470593         18:06:36.5 -28:03:07 16.3        70
Positions are for J2000

Event circumstances last updated at 2022/11/02 02:18:12 UT

Marc W. Buie, Southwest Research Institute

RECON