RECON: TNO occultation with 459865

Event between (459865) 13XZ8 and star GA0760:21308273 with event index number of 2287516

Geocentric closest approach at 2028/08/01 05:29:25 UTC

J2000 position of star is 19:09:40.0 -12:37:01
Equinox of date position of star is 19:11:02.2 -12:34:33
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 28 degrees from the moon. Moon is 84% illuminated.
Apparent brightness V=20.3

[RECON map]
Object is 12.0 AU from the Sun and 11.1 AU from the Earth.
Apparent velocity is 19.2 km/sec on the sky relative to the star, or, 8.6 arcsec/hr.
The 1-sigma error in the time of the event is 70 seconds.
The 1-sigma cross-track error in the shadow position is 778 km.
The sky-plane scale is 8017.8 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=70.8 km assuming a 5% albedo -- 4.0 sec chord
Diameter=28.9 km assuming a 30% albedo -- 1.6 sec chord
Dynamical classification is CENTAURR

Star training set for 459865, (2028/08/01 05:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:09.9 -26:29:34  0.9 40.00  13
Nunki          18:57:02.1 -26:15:31  2.0 14.09  20
PPM 235666     19:14:51.3 -12:13:56  5.2  0.94  29
PPM 235544     19:10:02.5 -12:54:32  7.5  0.45  27
PPM 235584     19:11:31.9 -12:46:58  9.4  0.22  28
459865         19:11:16.0 -12:34:07 15.2        28
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 22.3 km RECON observability=0.8 and success probability=0.3%

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

Sleaford 05:29:09 -16.7 AT Up 25.3 179.2 Low 05:22:47 - 05:35:30 3820

Kamloops 05:30:01 -13.2 AT Up 25.4 163.8 Low 05:23:40 - 05:36:23 3786

Kelowna 05:29:59 -14.2 AT Up 26.3 164.7 Low 05:23:37 - 05:36:20 3745

Peachland 05:30:00 -14.2 AT Up 26.4 164.4 Low 05:23:39 - 05:36:22 3740

Summerland 05:30:00 -14.3 AT Up 26.5 164.4 Low 05:23:39 - 05:36:22 3732

Penticton 05:30:00 -14.4 AT Up 26.6 164.6 Low 05:23:38 - 05:36:21 3729

Oliver 05:30:00 -14.7 AT Up 27.0 164.5 Low 05:23:39 - 05:36:22 3710

Anarchist Mountain Observatory 05:30:00 -14.9 AT Up 27.2 164.7 Low 05:23:38 - 05:36:21 3702

Victoria 05:30:15 -13.6 AT Up 26.8 160.3 Low 05:23:54 - 05:36:37 3676

Okanogan 05:30:01 -15.3 AT Up 27.7 164.4 Low 05:23:40 - 05:36:23 3668

Brewster 05:30:02 -15.5 AT Up 28.0 164.1 Low 05:23:41 - 05:36:24 3653

Manson/Chelan 05:30:04 -15.5 AT Up 28.1 163.7 Low 05:23:43 - 05:36:26 3642

Wenatchee 05:30:05 -15.8 AT Up 28.5 163.4 Low 05:23:44 - 05:36:27 3617

Ellensburg 05:30:07 -16.0 AT Up 28.9 163.1 Low 05:23:45 - 05:36:28 3594

Yakima 05:30:07 -16.3 AT Up 29.3 163.1 Low 05:23:46 - 05:36:29 3571

Toppenish/White Swan 05:30:07 -16.6 AT Up 29.5 163.2 Low 05:23:45 - 05:36:28 3559

PNWRO 05:30:02 -17.5 AT Up 30.1 164.8 Up 05:23:40 - 05:36:23 3537

The Dalles 05:30:11 -16.8 AT Up 30.1 162.2 Up 05:23:49 - 05:36:32 3515

Maupin 05:30:11 -17.2 AT Up 30.5 162.3 Up 05:23:50 - 05:36:33 3491

Sisters 05:30:14 -17.6 AT Up 31.2 161.6 Up 05:23:53 - 05:36:36 3439

Bend 05:30:13 -17.9 AT Up 31.5 161.8 Up 05:23:52 - 05:36:35 3425

Oregon Observatory 05:30:14 -18.0 Dark Up 31.7 161.6 Up 05:23:53 - 05:36:36 3415

Chiloquin 05:30:18 -18.8 Dark Up 32.8 160.9 Up 05:23:56 - 05:36:39 3334

Klamath Falls 05:30:18 -19.1 Dark Up 33.2 160.9 Up 05:23:56 - 05:36:39 3312

Cedarville 05:30:12 -20.4 Dark Up 34.2 162.6 Up 05:23:51 - 05:36:34 3267

Fall River/Burney 05:30:18 -20.2 Dark Up 34.4 161.1 Up 05:23:56 - 05:36:39 3236

Greenville 05:30:17 -21.1 Dark Up 35.3 161.4 Up 05:23:56 - 05:36:39 3177

Gimple 05:30:17 -21.1 Dark Up 35.4 161.5 Up 05:23:55 - 05:36:38 3177

Quincy 05:30:17 -21.2 Dark Up 35.5 161.4 Up 05:23:56 - 05:36:39 3163

Portola 05:30:15 -21.6 Dark Up 35.8 161.9 Up 05:23:54 - 05:36:37 3155

Dunrhomin 05:29:09 -27.6 Dark Up 37.1 180.1 Up 05:22:48 - 05:35:31 3138

Reno 05:30:13 -22.1 Dark Up 36.2 162.6 Up 05:23:51 - 05:36:34 3136

Nikitin 05:29:09 -27.7 Dark Up 37.3 180.1 Up 05:22:48 - 05:35:31 3126

CU-SBO 05:29:09 -27.8 Dark Up 37.4 180.0 Up 05:22:48 - 05:35:31 3122

Carson City 05:30:13 -22.4 Dark Up 36.5 162.5 Up 05:23:52 - 05:36:35 3112

Yerington 05:30:10 -22.8 Dark Up 36.8 163.2 Up 05:23:49 - 05:36:32 3098

Gardnerville 05:30:13 -22.6 Dark Up 36.8 162.5 Up 05:23:51 - 05:36:34 3096

Hawthorne 05:30:09 -23.5 Dark Up 37.4 163.8 Up 05:23:48 - 05:36:31 3066

Lee Vining 05:30:12 -23.7 Dark Up 37.8 163.1 Up 05:23:50 - 05:36:33 3028

Bishop 05:30:09 -24.5 Dark Up 38.6 163.8 Up 05:23:48 - 05:36:31 2984

Beatty 05:30:02 -25.6 Dark Up 39.3 165.7 Up 05:23:41 - 05:36:24 2949

Patrick 05:29:51 -28.2 Dark Up 41.3 169.0 Up 05:23:29 - 05:36:12 2834

Laughlin/Bullhead City 05:29:54 -28.1 Dark Up 41.4 168.0 Up 05:23:32 - 05:36:15 2817

Lake Havasu City 05:29:53 -28.7 Dark Up 42.1 168.2 Up 05:23:32 - 05:36:15 2767

Wildwood 05:30:13 -26.9 Dark Up 41.7 162.8 Up 05:23:52 - 05:36:35 2745

Idyllwild 05:30:05 -28.1 Dark Up 42.4 165.0 Up 05:23:44 - 05:36:27 2716

George/Scottsdale 05:29:42 -30.5 Dark Up 43.3 171.3 Up 05:23:21 - 05:36:04 2700

Calipatria 05:30:00 -29.2 Dark Up 43.3 166.4 Up 05:23:38 - 05:36:21 2666

Yuma 05:29:56 -30.0 Dark Up 43.8 167.5 Up 05:23:34 - 05:36:17 2630

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, (2028/08/01 05:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 40.00  13
Nunki          18:55:15.9 -26:17:50  2.0 14.09  20
PPM 235666     19:13:15.6 -12:16:58  5.2  0.94  29
PPM 235544     19:08:26.2 -12:57:22  7.5  0.45  27
PPM 235584     19:09:55.8 -12:49:52  9.4  0.22  28
459865         19:09:40.0 -12:37:01 15.2        28
Positions are for J2000

Event circumstances last updated at 2024/06/24 21:33:34 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	05:29:09	-16.7	AT	Up	25.3	179.2	Low	05:22:47 - 05:35:30	3820
Kamloops	05:30:01	-13.2	AT	Up	25.4	163.8	Low	05:23:40 - 05:36:23	3786
Kelowna	05:29:59	-14.2	AT	Up	26.3	164.7	Low	05:23:37 - 05:36:20	3745
Peachland	05:30:00	-14.2	AT	Up	26.4	164.4	Low	05:23:39 - 05:36:22	3740
Summerland	05:30:00	-14.3	AT	Up	26.5	164.4	Low	05:23:39 - 05:36:22	3732
Penticton	05:30:00	-14.4	AT	Up	26.6	164.6	Low	05:23:38 - 05:36:21	3729
Oliver	05:30:00	-14.7	AT	Up	27.0	164.5	Low	05:23:39 - 05:36:22	3710
Anarchist Mountain Observatory	05:30:00	-14.9	AT	Up	27.2	164.7	Low	05:23:38 - 05:36:21	3702
Victoria	05:30:15	-13.6	AT	Up	26.8	160.3	Low	05:23:54 - 05:36:37	3676
Okanogan	05:30:01	-15.3	AT	Up	27.7	164.4	Low	05:23:40 - 05:36:23	3668
Brewster	05:30:02	-15.5	AT	Up	28.0	164.1	Low	05:23:41 - 05:36:24	3653
Manson/Chelan	05:30:04	-15.5	AT	Up	28.1	163.7	Low	05:23:43 - 05:36:26	3642
Wenatchee	05:30:05	-15.8	AT	Up	28.5	163.4	Low	05:23:44 - 05:36:27	3617
Ellensburg	05:30:07	-16.0	AT	Up	28.9	163.1	Low	05:23:45 - 05:36:28	3594
Yakima	05:30:07	-16.3	AT	Up	29.3	163.1	Low	05:23:46 - 05:36:29	3571
Toppenish/White Swan	05:30:07	-16.6	AT	Up	29.5	163.2	Low	05:23:45 - 05:36:28	3559
PNWRO	05:30:02	-17.5	AT	Up	30.1	164.8	Up	05:23:40 - 05:36:23	3537
The Dalles	05:30:11	-16.8	AT	Up	30.1	162.2	Up	05:23:49 - 05:36:32	3515
Maupin	05:30:11	-17.2	AT	Up	30.5	162.3	Up	05:23:50 - 05:36:33	3491
Sisters	05:30:14	-17.6	AT	Up	31.2	161.6	Up	05:23:53 - 05:36:36	3439
Bend	05:30:13	-17.9	AT	Up	31.5	161.8	Up	05:23:52 - 05:36:35	3425
Oregon Observatory	05:30:14	-18.0	Dark	Up	31.7	161.6	Up	05:23:53 - 05:36:36	3415
Chiloquin	05:30:18	-18.8	Dark	Up	32.8	160.9	Up	05:23:56 - 05:36:39	3334
Klamath Falls	05:30:18	-19.1	Dark	Up	33.2	160.9	Up	05:23:56 - 05:36:39	3312
Cedarville	05:30:12	-20.4	Dark	Up	34.2	162.6	Up	05:23:51 - 05:36:34	3267
Fall River/Burney	05:30:18	-20.2	Dark	Up	34.4	161.1	Up	05:23:56 - 05:36:39	3236
Greenville	05:30:17	-21.1	Dark	Up	35.3	161.4	Up	05:23:56 - 05:36:39	3177
Gimple	05:30:17	-21.1	Dark	Up	35.4	161.5	Up	05:23:55 - 05:36:38	3177
Quincy	05:30:17	-21.2	Dark	Up	35.5	161.4	Up	05:23:56 - 05:36:39	3163
Portola	05:30:15	-21.6	Dark	Up	35.8	161.9	Up	05:23:54 - 05:36:37	3155
Dunrhomin	05:29:09	-27.6	Dark	Up	37.1	180.1	Up	05:22:48 - 05:35:31	3138
Reno	05:30:13	-22.1	Dark	Up	36.2	162.6	Up	05:23:51 - 05:36:34	3136
Nikitin	05:29:09	-27.7	Dark	Up	37.3	180.1	Up	05:22:48 - 05:35:31	3126
CU-SBO	05:29:09	-27.8	Dark	Up	37.4	180.0	Up	05:22:48 - 05:35:31	3122
Carson City	05:30:13	-22.4	Dark	Up	36.5	162.5	Up	05:23:52 - 05:36:35	3112
Yerington	05:30:10	-22.8	Dark	Up	36.8	163.2	Up	05:23:49 - 05:36:32	3098
Gardnerville	05:30:13	-22.6	Dark	Up	36.8	162.5	Up	05:23:51 - 05:36:34	3096
Hawthorne	05:30:09	-23.5	Dark	Up	37.4	163.8	Up	05:23:48 - 05:36:31	3066
Lee Vining	05:30:12	-23.7	Dark	Up	37.8	163.1	Up	05:23:50 - 05:36:33	3028
Bishop	05:30:09	-24.5	Dark	Up	38.6	163.8	Up	05:23:48 - 05:36:31	2984
Beatty	05:30:02	-25.6	Dark	Up	39.3	165.7	Up	05:23:41 - 05:36:24	2949
Patrick	05:29:51	-28.2	Dark	Up	41.3	169.0	Up	05:23:29 - 05:36:12	2834
Laughlin/Bullhead City	05:29:54	-28.1	Dark	Up	41.4	168.0	Up	05:23:32 - 05:36:15	2817
Lake Havasu City	05:29:53	-28.7	Dark	Up	42.1	168.2	Up	05:23:32 - 05:36:15	2767
Wildwood	05:30:13	-26.9	Dark	Up	41.7	162.8	Up	05:23:52 - 05:36:35	2745
Idyllwild	05:30:05	-28.1	Dark	Up	42.4	165.0	Up	05:23:44 - 05:36:27	2716
George/Scottsdale	05:29:42	-30.5	Dark	Up	43.3	171.3	Up	05:23:21 - 05:36:04	2700
Calipatria	05:30:00	-29.2	Dark	Up	43.3	166.4	Up	05:23:38 - 05:36:21	2666
Yuma	05:29:56	-30.0	Dark	Up	43.8	167.5	Up	05:23:34 - 05:36:17	2630