RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0720:27365393 with event index number of 2286010

Geocentric closest approach at 2027/06/22 05:13:00 UTC

J2000 position of star is 18:43:50.9 -17:11:12
Equinox of date position of star is 18:45:16.1 -17:09:37
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 26 degrees from the moon. Moon is 91% illuminated.
Apparent brightness V=19.9

[RECON map]
Object is 11.2 AU from the Sun and 10.2 AU from the Earth.
Apparent velocity is 20.9 km/sec on the sky relative to the star, or, 10.1 arcsec/hr.
The 1-sigma error in the time of the event is 52 seconds.
The 1-sigma cross-track error in the shadow position is 639 km.
The sky-plane scale is 7419.8 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 3.6 sec chord
Diameter=28.9 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR

Star training set for 459865, (2027/06/22 05:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.8 -26:29:26  0.9 32.44  56
Nunki          18:56:58.0 -26:15:36  2.0  9.49  23
PPM 234930     18:44:32.2 -19:15:20  6.1  2.11  26
PPM 234948     18:45:27.1 -16:54:44  7.8  0.24  26
PPM 234931     18:44:31.4 -17:14:50  9.6  0.24  26
459865         18:45:26.5 -17:09:25 16.9        25
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 18.5 km RECON observability=0.2 and success probability=0.1%

Site Site mid-time
(UT) Sun alt
(deg) Sky Moon Star alt
(deg) Star az
(deg) Target Observing Time
(UT) X-track
(km)

Sleaford 05:15:24 -10.7 NT Down 13.3 142.9 Really Low 05:10:34 - 05:20:15 3721

Kamloops 05:16:00 -7.2 NT Down 8.2 130.3 Really Low 05:11:10 - 05:20:51 3361

Kelowna 05:16:01 -8.2 NT Down 9.2 131.0 Really Low 05:11:10 - 05:20:51 3332

Peachland 05:16:02 -8.2 NT Down 9.1 130.7 Really Low 05:11:11 - 05:20:52 3319

Summerland 05:16:02 -8.3 NT Down 9.3 130.8 Really Low 05:11:12 - 05:20:53 3312

Penticton 05:16:02 -8.4 NT Down 9.4 130.9 Really Low 05:11:11 - 05:20:52 3310

Oliver 05:16:03 -8.7 NT Down 9.6 130.8 Really Low 05:11:12 - 05:20:53 3289

Anarchist Mountain Observatory 05:16:03 -8.9 NT Down 9.8 131.0 Really Low 05:11:12 - 05:20:53 3283

Okanogan 05:16:05 -9.4 NT Down 10.1 130.7 Really Low 05:11:15 - 05:20:56 3238

Brewster 05:16:06 -9.5 NT Down 10.2 130.5 Really Low 05:11:16 - 05:20:57 3217

Manson/Chelan 05:16:08 -9.5 NT Down 10.1 130.2 Really Low 05:11:17 - 05:20:58 3196

Victoria 05:16:12 -7.6 NT Down 8.1 127.6 Really Low 05:11:22 - 05:21:03 3164

Wenatchee 05:16:09 -9.8 NT Down 10.4 130.0 Really Low 05:11:19 - 05:21:00 3162

Ellensburg 05:16:11 -10.0 NT Down 10.5 129.8 Really Low 05:11:21 - 05:21:02 3131

PNWRO 05:16:10 -11.5 NT Down 12.0 131.0 Really Low 05:11:20 - 05:21:01 3104

Yakima 05:16:12 -10.4 NT Down 10.8 129.7 Really Low 05:11:22 - 05:21:03 3104

Toppenish/White Swan 05:16:13 -10.6 NT Down 11.0 129.8 Really Low 05:11:22 - 05:21:03 3094

Dunrhomin 05:15:46 -21.6 Dark Up 23.0 141.3 Low 05:10:56 - 05:20:37 3032

The Dalles 05:16:16 -10.9 NT Down 11.1 129.1 Really Low 05:11:26 - 05:21:07 3024

Nikitin 05:15:47 -21.8 Dark Up 23.2 141.3 Low 05:10:56 - 05:20:37 3019

CU-SBO 05:15:47 -21.8 Dark Up 23.2 141.2 Low 05:10:57 - 05:20:38 3013

Maupin 05:16:17 -11.2 NT Down 11.4 129.1 Really Low 05:11:27 - 05:21:08 2999

Sisters 05:16:21 -11.7 NT Down 11.7 128.6 Really Low 05:11:30 - 05:21:11 2928

Bend 05:16:21 -12.0 NT Down 12.0 128.7 Really Low 05:11:30 - 05:21:11 2918

Oregon Observatory 05:16:21 -12.1 AT Down 12.0 128.6 Really Low 05:11:31 - 05:21:12 2903

Chiloquin 05:16:26 -12.9 AT Down 12.6 128.1 Really Low 05:11:35 - 05:21:16 2801

Klamath Falls 05:16:26 -13.2 AT Down 12.9 128.1 Really Low 05:11:36 - 05:21:17 2778

Cedarville 05:16:25 -14.5 AT Down 14.2 129.2 Really Low 05:11:34 - 05:21:15 2768

Fall River/Burney 05:16:29 -14.3 AT Down 13.8 128.1 Really Low 05:11:38 - 05:21:19 2703

Gimple 05:16:29 -15.2 AT Down 14.7 128.4 Really Low 05:11:39 - 05:21:20 2649

Greenville 05:16:30 -15.2 AT Down 14.6 128.3 Really Low 05:11:39 - 05:21:20 2647

Portola 05:16:30 -15.7 AT Down 15.1 128.6 Really Low 05:11:39 - 05:21:20 2636

Quincy 05:16:30 -15.4 AT Down 14.8 128.3 Really Low 05:11:40 - 05:21:21 2632

Reno 05:16:28 -16.2 AT Down 15.7 129.1 Really Low 05:11:38 - 05:21:19 2632

Yerington 05:16:28 -17.0 AT Down 16.4 129.4 Really Low 05:11:38 - 05:21:19 2608

Carson City 05:16:29 -16.5 AT Down 15.9 129.0 Really Low 05:11:39 - 05:21:20 2606

Gardnerville 05:16:30 -16.7 AT Down 16.1 129.0 Really Low 05:11:39 - 05:21:20 2589

Hawthorne 05:16:27 -17.6 AT Down 17.1 129.7 Really Low 05:11:37 - 05:21:18 2586

Lee Vining 05:16:30 -17.8 AT Down 17.1 129.2 Really Low 05:11:40 - 05:21:21 2531

Beatty 05:16:26 -19.8 Dark Down 19.2 130.8 Really Low 05:11:36 - 05:21:17 2510

Bishop 05:16:30 -18.6 Dark Down 17.9 129.6 Really Low 05:11:39 - 05:21:20 2504

Patrick 05:16:21 -22.3 Dark Up 22.0 132.6 Low 05:11:30 - 05:21:11 2470

Laughlin/Bullhead City 05:16:23 -22.2 Dark Up 21.7 132.0 Low 05:11:33 - 05:21:14 2432

George/Scottsdale 05:16:18 -24.7 Dark Up 24.3 133.7 Low 05:11:28 - 05:21:09 2389

Lake Havasu City 05:16:24 -22.9 Dark Up 22.3 132.0 Low 05:11:34 - 05:21:15 2386

Idyllwild 05:16:32 -22.3 Dark Up 21.3 130.0 Low 05:11:42 - 05:21:23 2263

Calipatria 05:16:30 -23.4 Dark Up 22.5 130.7 Low 05:11:39 - 05:21:20 2245

Wildwood 05:16:37 -21.1 Dark Down 19.9 128.6 Really Low 05:11:46 - 05:21:27 2241

Yuma 05:16:28 -24.2 Dark Up 23.3 131.2 Low 05:11:37 - 05:21:18 2234

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 459865, (2027/06/22 05:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 32.44  56
Nunki          18:55:15.9 -26:17:50  2.0  9.49  23
PPM 234930     18:42:55.1 -19:17:04  6.1  2.11  26
PPM 234948     18:43:51.7 -16:56:30  7.8  0.24  26
PPM 234931     18:42:55.7 -17:16:35  9.6  0.24  26
459865         18:43:50.9 -17:11:12 16.9        26
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:29:07 UT

Marc W. Buie, Southwest Research Institute

RECON

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	05:15:24	-10.7	NT	Down	13.3	142.9	Really Low	05:10:34 - 05:20:15	3721
Kamloops	05:16:00	-7.2	NT	Down	8.2	130.3	Really Low	05:11:10 - 05:20:51	3361
Kelowna	05:16:01	-8.2	NT	Down	9.2	131.0	Really Low	05:11:10 - 05:20:51	3332
Peachland	05:16:02	-8.2	NT	Down	9.1	130.7	Really Low	05:11:11 - 05:20:52	3319
Summerland	05:16:02	-8.3	NT	Down	9.3	130.8	Really Low	05:11:12 - 05:20:53	3312
Penticton	05:16:02	-8.4	NT	Down	9.4	130.9	Really Low	05:11:11 - 05:20:52	3310
Oliver	05:16:03	-8.7	NT	Down	9.6	130.8	Really Low	05:11:12 - 05:20:53	3289
Anarchist Mountain Observatory	05:16:03	-8.9	NT	Down	9.8	131.0	Really Low	05:11:12 - 05:20:53	3283
Okanogan	05:16:05	-9.4	NT	Down	10.1	130.7	Really Low	05:11:15 - 05:20:56	3238
Brewster	05:16:06	-9.5	NT	Down	10.2	130.5	Really Low	05:11:16 - 05:20:57	3217
Manson/Chelan	05:16:08	-9.5	NT	Down	10.1	130.2	Really Low	05:11:17 - 05:20:58	3196
Victoria	05:16:12	-7.6	NT	Down	8.1	127.6	Really Low	05:11:22 - 05:21:03	3164
Wenatchee	05:16:09	-9.8	NT	Down	10.4	130.0	Really Low	05:11:19 - 05:21:00	3162
Ellensburg	05:16:11	-10.0	NT	Down	10.5	129.8	Really Low	05:11:21 - 05:21:02	3131
PNWRO	05:16:10	-11.5	NT	Down	12.0	131.0	Really Low	05:11:20 - 05:21:01	3104
Yakima	05:16:12	-10.4	NT	Down	10.8	129.7	Really Low	05:11:22 - 05:21:03	3104
Toppenish/White Swan	05:16:13	-10.6	NT	Down	11.0	129.8	Really Low	05:11:22 - 05:21:03	3094
Dunrhomin	05:15:46	-21.6	Dark	Up	23.0	141.3	Low	05:10:56 - 05:20:37	3032
The Dalles	05:16:16	-10.9	NT	Down	11.1	129.1	Really Low	05:11:26 - 05:21:07	3024
Nikitin	05:15:47	-21.8	Dark	Up	23.2	141.3	Low	05:10:56 - 05:20:37	3019
CU-SBO	05:15:47	-21.8	Dark	Up	23.2	141.2	Low	05:10:57 - 05:20:38	3013
Maupin	05:16:17	-11.2	NT	Down	11.4	129.1	Really Low	05:11:27 - 05:21:08	2999
Sisters	05:16:21	-11.7	NT	Down	11.7	128.6	Really Low	05:11:30 - 05:21:11	2928
Bend	05:16:21	-12.0	NT	Down	12.0	128.7	Really Low	05:11:30 - 05:21:11	2918
Oregon Observatory	05:16:21	-12.1	AT	Down	12.0	128.6	Really Low	05:11:31 - 05:21:12	2903
Chiloquin	05:16:26	-12.9	AT	Down	12.6	128.1	Really Low	05:11:35 - 05:21:16	2801
Klamath Falls	05:16:26	-13.2	AT	Down	12.9	128.1	Really Low	05:11:36 - 05:21:17	2778
Cedarville	05:16:25	-14.5	AT	Down	14.2	129.2	Really Low	05:11:34 - 05:21:15	2768
Fall River/Burney	05:16:29	-14.3	AT	Down	13.8	128.1	Really Low	05:11:38 - 05:21:19	2703
Gimple	05:16:29	-15.2	AT	Down	14.7	128.4	Really Low	05:11:39 - 05:21:20	2649
Greenville	05:16:30	-15.2	AT	Down	14.6	128.3	Really Low	05:11:39 - 05:21:20	2647
Portola	05:16:30	-15.7	AT	Down	15.1	128.6	Really Low	05:11:39 - 05:21:20	2636
Quincy	05:16:30	-15.4	AT	Down	14.8	128.3	Really Low	05:11:40 - 05:21:21	2632
Reno	05:16:28	-16.2	AT	Down	15.7	129.1	Really Low	05:11:38 - 05:21:19	2632
Yerington	05:16:28	-17.0	AT	Down	16.4	129.4	Really Low	05:11:38 - 05:21:19	2608
Carson City	05:16:29	-16.5	AT	Down	15.9	129.0	Really Low	05:11:39 - 05:21:20	2606
Gardnerville	05:16:30	-16.7	AT	Down	16.1	129.0	Really Low	05:11:39 - 05:21:20	2589
Hawthorne	05:16:27	-17.6	AT	Down	17.1	129.7	Really Low	05:11:37 - 05:21:18	2586
Lee Vining	05:16:30	-17.8	AT	Down	17.1	129.2	Really Low	05:11:40 - 05:21:21	2531
Beatty	05:16:26	-19.8	Dark	Down	19.2	130.8	Really Low	05:11:36 - 05:21:17	2510
Bishop	05:16:30	-18.6	Dark	Down	17.9	129.6	Really Low	05:11:39 - 05:21:20	2504
Patrick	05:16:21	-22.3	Dark	Up	22.0	132.6	Low	05:11:30 - 05:21:11	2470
Laughlin/Bullhead City	05:16:23	-22.2	Dark	Up	21.7	132.0	Low	05:11:33 - 05:21:14	2432
George/Scottsdale	05:16:18	-24.7	Dark	Up	24.3	133.7	Low	05:11:28 - 05:21:09	2389
Lake Havasu City	05:16:24	-22.9	Dark	Up	22.3	132.0	Low	05:11:34 - 05:21:15	2386
Idyllwild	05:16:32	-22.3	Dark	Up	21.3	130.0	Low	05:11:42 - 05:21:23	2263
Calipatria	05:16:30	-23.4	Dark	Up	22.5	130.7	Low	05:11:39 - 05:21:20	2245
Wildwood	05:16:37	-21.1	Dark	Down	19.9	128.6	Really Low	05:11:46 - 05:21:27	2241
Yuma	05:16:28	-24.2	Dark	Up	23.3	131.2	Low	05:11:37 - 05:21:18	2234