RECON: TNO occultation with 559801

Event between (559801) 15DX224 and star GA0800:04847368 with event index number of 2440014

Geocentric closest approach at 2026/05/27 04:52:30 UTC

J2000 position of star is 15:41:09.9 -08:35:14
Equinox of date position of star is 15:42:26.4 -08:39:42
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 38 degrees from the moon. Moon is 85% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 35.8 AU from the Sun and 34.8 AU from the Earth.
Apparent velocity is 23.3 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 98 seconds.
The 1-sigma cross-track error in the shadow position is 1668 km.
The sky-plane scale is 25224.8 km/arcsec.

The object has an absolute magnitude Hv=6.5
Diameter=289.7 km assuming a 5% albedo -- 12.8 sec chord
Diameter=118.3 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 559801, (2026/05/27 04:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.8 -26:29:18  0.9 21.20  50
27Bet Lib      15:18:25.9 -09:28:43  2.6  6.02  32
PPM 198725     15:35:52.3 -09:16:14  5.6  1.76  36
PPM 198858     15:42:26.0 -08:49:31  8.1  0.16  38
PPM 198871     15:43:12.8 -08:40:15  9.4  0.15  38
559801         15:42:35.5 -08:40:14 15.6        38
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 26.8 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 04:54:04 -11.6 NT Up 26.2 154.6 Low 04:45:23 - 05:02:44 11335
Kamloops 04:54:41 -7.4 NT Up 22.6 139.6 Low 04:46:01 - 05:03:22 11071
Kelowna 04:54:41 -8.4 NT Up 23.5 140.3 Low 04:46:01 - 05:03:22 11030
Peachland 04:54:42 -8.4 NT Up 23.5 140.0 Low 04:46:02 - 05:03:23 11019
Summerland 04:54:42 -8.5 NT Up 23.7 140.0 Low 04:46:01 - 05:03:22 11010
Penticton 04:54:42 -8.6 NT Up 23.8 140.1 Low 04:46:02 - 05:03:23 11007
Oliver 04:54:43 -8.9 NT Up 24.0 140.0 Low 04:46:02 - 05:03:23 10983
Anarchist Mountain Observatory 04:54:43 -9.1 NT Up 24.2 140.2 Low 04:46:02 - 05:03:23 10975
Okanogan 04:54:43 -9.5 NT Up 24.6 139.8 Low 04:46:03 - 05:03:24 10928
Brewster 04:54:45 -9.6 NT Up 24.8 139.5 Low 04:46:04 - 05:03:25 10906
Manson/Chelan 04:54:47 -9.6 NT Up 24.8 139.1 Low 04:46:06 - 05:03:27 10887
Victoria 04:54:53 -7.6 NT Up 22.8 136.1 Low 04:46:12 - 05:03:33 10886
Wenatchee 04:54:47 -9.9 NT Up 25.0 138.8 Low 04:46:06 - 05:03:27 10852
Ellensburg 04:54:48 -10.1 NT Up 25.3 138.4 Low 04:46:08 - 05:03:29 10820
Yakima 04:54:50 -10.4 NT Up 25.6 138.3 Low 04:46:10 - 05:03:31 10791
Toppenish/White Swan 04:54:50 -10.6 NT Up 25.8 138.4 Low 04:46:09 - 05:03:30 10778
PNWRO 04:54:47 -11.6 NT Up 26.8 139.7 Low 04:46:06 - 05:03:27 10772
The Dalles 04:54:53 -10.8 NT Up 26.0 137.4 Low 04:46:12 - 05:03:33 10710
Maupin 04:54:53 -11.1 NT Up 26.4 137.3 Low 04:46:12 - 05:03:33 10681
Sisters 04:54:56 -11.5 NT Up 26.8 136.6 Low 04:46:15 - 05:03:36 10609
Bend 04:54:56 -11.8 NT Up 27.1 136.7 Low 04:46:15 - 05:03:36 10596
Oregon Observatory 04:54:56 -11.9 NT Up 27.1 136.5 Low 04:46:16 - 05:03:37 10581
Dunrhomin 04:54:13 -22.1 Dark Up 37.1 152.2 Up 04:45:33 - 05:02:54 10541
Nikitin 04:54:12 -22.2 Dark Up 37.2 152.1 Up 04:45:32 - 05:02:53 10526
CU-SBO 04:54:13 -22.2 Dark Up 37.2 152.0 Up 04:45:32 - 05:02:53 10520
Chiloquin 04:55:00 -12.6 AT Up 27.9 135.7 Low 04:46:19 - 05:03:40 10474
Klamath Falls 04:55:00 -12.9 AT Up 28.2 135.6 Low 04:46:19 - 05:03:40 10449
Cedarville 04:54:57 -14.3 AT Up 29.5 136.9 Low 04:46:16 - 05:03:37 10420
Fall River/Burney 04:55:01 -14.0 AT Up 29.2 135.6 Low 04:46:21 - 05:03:42 10363
Gimple 04:55:01 -14.9 AT Up 30.2 135.7 Up 04:46:20 - 05:03:41 10299
Greenville 04:55:01 -14.9 AT Up 30.1 135.6 Up 04:46:20 - 05:03:41 10298
Quincy 04:55:01 -15.0 AT Up 30.3 135.5 Up 04:46:20 - 05:03:41 10281
Portola 04:55:00 -15.3 AT Up 30.6 136.0 Up 04:46:20 - 05:03:41 10279
Reno 04:54:58 -15.9 AT Up 31.1 136.5 Up 04:46:18 - 05:03:39 10268
Carson City 04:54:59 -16.2 AT Up 31.4 136.3 Up 04:46:18 - 05:03:39 10239
Yerington 04:54:57 -16.6 AT Up 31.9 136.9 Up 04:46:17 - 05:03:38 10233
Gardnerville 04:54:59 -16.4 AT Up 31.6 136.3 Up 04:46:18 - 05:03:39 10220
Hawthorne 04:54:57 -17.3 AT Up 32.5 137.2 Up 04:46:16 - 05:03:37 10204
Lee Vining 04:54:59 -17.4 AT Up 32.7 136.5 Up 04:46:18 - 05:03:39 10150
Bishop 04:54:57 -18.2 Dark Up 33.5 136.9 Up 04:46:17 - 05:03:38 10112
Beatty 04:54:52 -19.4 Dark Up 34.7 138.3 Up 04:46:12 - 05:03:33 10099
Patrick 04:54:45 -22.1 Dark Up 37.3 140.6 Up 04:46:05 - 05:03:26 10021
Laughlin/Bullhead City 04:54:48 -21.9 Dark Up 37.2 139.7 Up 04:46:08 - 05:03:29 9988
Lake Havasu City 04:54:48 -22.5 Dark Up 37.8 139.7 Up 04:46:07 - 05:03:28 9935
George/Scottsdale 04:54:40 -24.4 Dark Up 39.7 141.9 Up 04:46:00 - 05:03:21 9908
Idyllwild 04:54:56 -21.8 Dark Up 37.1 136.8 Up 04:46:16 - 05:03:37 9831
Wildwood 04:55:02 -20.5 Dark Up 35.7 135.2 Up 04:46:22 - 05:03:43 9830
Calipatria 04:54:53 -22.9 Dark Up 38.2 137.7 Up 04:46:12 - 05:03:33 9797
Yuma 04:54:50 -23.7 Dark Up 39.0 138.4 Up 04:46:10 - 05:03:31 9774

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 559801, (2026/05/27 04:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.20  50
27Bet Lib      15:17:00.3 -09:22:59  2.6  6.02  32
PPM 198725     15:34:26.4 -09:11:01  5.6  1.76  36
PPM 198858     15:41:00.3 -08:44:31  8.1  0.16  38
PPM 198871     15:41:47.2 -08:35:16  9.4  0.15  38
559801         15:41:09.9 -08:35:14 15.6        38
Positions are for J2000

Event circumstances last updated at 2023/08/12 02:43:38 UT

Marc W. Buie, Southwest Research Institute

RECON