RECON: TNO occultation with 523759

Event between (523759) 14WK509 and star GA1200:01089910 with event index number of 2614574

Geocentric closest approach at 2028/10/04 06:39:59 UTC

J2000 position of star is 04:48:36.4 +30:28:40
Equinox of date position of star is 04:50:08.0 +30:31:06
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 56 degrees from the moon. Moon is 99% illuminated.
Apparent brightness V=21.6

[RECON map]
Object is 50.8 AU from the Sun and 50.3 AU from the Earth.
Apparent velocity is 10.8 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 374 seconds.
The 1-sigma cross-track error in the shadow position is 2333 km.
The sky-plane scale is 36506.6 km/arcsec.

The object has an absolute magnitude Hv=4.4
Diameter=783.5 km assuming a 5% albedo -- 74.8 sec chord
Diameter=319.8 km assuming a 30% albedo -- 30.5 sec chord
Dynamical classification is SCATNEAR

Star training set for 523759, (2028/10/04 06:49UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:34.4 +16:33:54  0.8 14.27  53
3Iot Aur       04:58:52.3 +33:12:32  2.7  3.22  58
PPM 069664     04:51:03.8 +31:29:05  6.4  0.97  56
PPM 093785     04:50:12.1 +29:49:17  7.5  0.71  56
PPM 069662     04:50:50.7 +31:00:54  9.6  0.50  56
PPM 069667     04:51:10.2 +30:21:15 10.6  0.23  56
523759         04:50:26.4 +30:31:35 16.5        56
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 2.4 sigma about the mid-time.
The median site spacing is 28.8 km RECON observability=1.0 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)

Kamloops 06:47:51 -42.1 Dark Up 31.0 78.4 Up 06:32:51 - 07:02:51 13211

Kelowna 06:47:58 -43.1 Dark Up 31.4 78.6 Up 06:32:58 - 07:02:58 13110

Peachland 06:47:59 -43.1 Dark Up 31.2 78.3 Up 06:32:59 - 07:02:59 13108

Victoria 06:48:13 -43.3 Dark Up 28.6 75.2 Low 06:33:13 - 07:03:13 13102

Summerland 06:47:54 -43.3 Dark Up 31.2 78.3 Up 06:32:54 - 07:02:54 13091

Penticton 06:47:54 -43.3 Dark Up 31.3 78.3 Up 06:32:54 - 07:02:54 13081

Oliver 06:47:58 -43.7 Dark Up 31.2 78.1 Up 06:32:58 - 07:02:58 13048

Anarchist Mountain Observatory 06:47:59 -43.9 Dark Up 31.3 78.1 Up 06:32:59 - 07:02:59 13026

Sleaford 06:46:59 -42.5 Dark Up 39.9 89.9 Up 06:31:59 - 07:01:59 12999

Okanogan 06:48:01 -44.4 Dark Up 31.0 77.6 Up 06:33:01 - 07:03:01 12971

Brewster 06:48:04 -44.6 Dark Up 30.8 77.3 Up 06:33:04 - 07:03:04 12951

Manson/Chelan 06:48:08 -44.8 Dark Up 30.6 77.0 Up 06:33:08 - 07:03:08 12942

Wenatchee 06:48:07 -45.1 Dark Up 30.3 76.6 Up 06:33:07 - 07:03:07 12902

Ellensburg 06:48:13 -45.5 Dark Up 30.1 76.2 Up 06:33:13 - 07:03:13 12869

Yakima 06:48:14 -45.9 Dark Up 30.0 76.0 Low 06:33:14 - 07:03:14 12831

Toppenish/White Swan 06:48:15 -46.1 Dark Up 30.1 76.0 Up 06:33:15 - 07:03:15 12805

The Dalles 06:48:22 -46.6 Dark Up 29.4 75.1 Low 06:33:22 - 07:03:22 12755

PNWRO 06:48:10 -46.8 Dark Up 31.0 76.7 Up 06:33:10 - 07:03:10 12723

Maupin 06:48:20 -47.0 Dark Up 29.3 74.9 Low 06:33:20 - 07:03:20 12711

Sisters 06:48:27 -47.7 Dark Up 28.8 74.2 Low 06:33:27 - 07:03:27 12642

Bend 06:48:26 -48.0 Dark Up 28.9 74.2 Low 06:33:26 - 07:03:26 12611

Oregon Observatory 06:48:29 -48.1 Dark Up 28.7 74.0 Low 06:33:29 - 07:03:29 12598

Chiloquin 06:48:35 -49.2 Dark Up 28.1 73.1 Low 06:33:35 - 07:03:35 12484

Klamath Falls 06:48:37 -49.5 Dark Up 28.1 73.0 Low 06:33:37 - 07:03:37 12448

Cedarville 06:48:36 -50.6 Dark Up 29.0 73.5 Low 06:33:36 - 07:03:36 12326

Fall River/Burney 06:48:41 -50.7 Dark Up 28.0 72.6 Low 06:33:41 - 07:03:41 12319

Greenville 06:48:43 -51.7 Dark Up 28.1 72.4 Low 06:33:43 - 07:03:43 12214

Gimple 06:48:44 -51.7 Dark Up 28.1 72.4 Low 06:33:44 - 07:03:44 12211

Quincy 06:48:45 -51.8 Dark Up 28.0 72.3 Low 06:33:45 - 07:03:45 12194

Portola 06:48:44 -52.1 Dark Up 28.3 72.5 Low 06:33:44 - 07:03:44 12165

Reno 06:48:43 -52.6 Dark Up 28.7 72.7 Low 06:33:43 - 07:03:43 12117

Carson City 06:48:44 -52.9 Dark Up 28.6 72.5 Low 06:33:44 - 07:03:44 12080

Gardnerville 06:48:45 -53.1 Dark Up 28.6 72.4 Low 06:33:45 - 07:03:45 12054

Yerington 06:48:43 -53.3 Dark Up 29.0 72.7 Low 06:33:43 - 07:03:43 12039

Hawthorne 06:48:43 -53.9 Dark Up 29.3 72.7 Low 06:33:43 - 07:03:43 11974

Lee Vining 06:48:47 -54.2 Dark Up 28.8 72.2 Low 06:33:47 - 07:03:47 11934

Bishop 06:48:46 -55.0 Dark Up 29.1 72.2 Low 06:33:46 - 07:03:46 11849

Dunrhomin 06:47:40 -54.3 Dark Up 39.6 80.7 Up 06:32:40 - 07:02:40 11765

Beatty 06:48:41 -55.9 Dark Up 30.2 72.7 Up 06:33:41 - 07:03:41 11747

Nikitin 06:47:42 -54.5 Dark Up 39.6 80.5 Up 06:32:42 - 07:02:42 11746

CU-SBO 06:47:42 -54.6 Dark Up 39.5 80.4 Up 06:32:42 - 07:02:42 11741

Wildwood 06:48:56 -57.9 Dark Up 27.9 70.5 Low 06:33:56 - 07:03:56 11524

Patrick 06:48:34 -58.1 Dark Up 32.0 73.2 Up 06:33:34 - 07:03:34 11500

Laughlin/Bullhead City 06:48:38 -58.2 Dark Up 31.4 72.7 Up 06:33:38 - 07:03:38 11498

Idyllwild 06:48:50 -58.9 Dark Up 29.3 71.1 Low 06:33:50 - 07:03:50 11422

Lake Havasu City 06:48:35 -58.9 Dark Up 31.4 72.4 Up 06:33:35 - 07:03:35 11420

Calipatria 06:48:48 -59.8 Dark Up 30.0 71.2 Up 06:33:48 - 07:03:48 11319

George/Scottsdale 06:48:31 -60.2 Dark Up 33.1 73.0 Up 06:33:31 - 07:03:31 11261

Yuma 06:48:45 -60.5 Dark Up 30.6 71.3 Up 06:33:45 - 07:03:45 11244

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 523759, (2028/10/04 06:49UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 14.27  53
3Iot Aur       04:56:59.6 +33:09:58  2.7  3.22  58
PPM 069664     04:49:12.9 +31:26:12  6.4  0.97  56
PPM 093785     04:48:22.7 +29:46:22  7.5  0.71  56
PPM 069662     04:49:00.3 +30:58:01  9.6  0.50  56
PPM 069667     04:49:20.3 +30:18:22 10.6  0.23  56
523759         04:48:36.4 +30:28:40 16.5        56
Positions are for J2000

Event circumstances last updated at 2023/12/18 04:54:14 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)
Kamloops	06:47:51	-42.1	Dark	Up	31.0	78.4	Up	06:32:51 - 07:02:51	13211
Kelowna	06:47:58	-43.1	Dark	Up	31.4	78.6	Up	06:32:58 - 07:02:58	13110
Peachland	06:47:59	-43.1	Dark	Up	31.2	78.3	Up	06:32:59 - 07:02:59	13108
Victoria	06:48:13	-43.3	Dark	Up	28.6	75.2	Low	06:33:13 - 07:03:13	13102
Summerland	06:47:54	-43.3	Dark	Up	31.2	78.3	Up	06:32:54 - 07:02:54	13091
Penticton	06:47:54	-43.3	Dark	Up	31.3	78.3	Up	06:32:54 - 07:02:54	13081
Oliver	06:47:58	-43.7	Dark	Up	31.2	78.1	Up	06:32:58 - 07:02:58	13048
Anarchist Mountain Observatory	06:47:59	-43.9	Dark	Up	31.3	78.1	Up	06:32:59 - 07:02:59	13026
Sleaford	06:46:59	-42.5	Dark	Up	39.9	89.9	Up	06:31:59 - 07:01:59	12999
Okanogan	06:48:01	-44.4	Dark	Up	31.0	77.6	Up	06:33:01 - 07:03:01	12971
Brewster	06:48:04	-44.6	Dark	Up	30.8	77.3	Up	06:33:04 - 07:03:04	12951
Manson/Chelan	06:48:08	-44.8	Dark	Up	30.6	77.0	Up	06:33:08 - 07:03:08	12942
Wenatchee	06:48:07	-45.1	Dark	Up	30.3	76.6	Up	06:33:07 - 07:03:07	12902
Ellensburg	06:48:13	-45.5	Dark	Up	30.1	76.2	Up	06:33:13 - 07:03:13	12869
Yakima	06:48:14	-45.9	Dark	Up	30.0	76.0	Low	06:33:14 - 07:03:14	12831
Toppenish/White Swan	06:48:15	-46.1	Dark	Up	30.1	76.0	Up	06:33:15 - 07:03:15	12805
The Dalles	06:48:22	-46.6	Dark	Up	29.4	75.1	Low	06:33:22 - 07:03:22	12755
PNWRO	06:48:10	-46.8	Dark	Up	31.0	76.7	Up	06:33:10 - 07:03:10	12723
Maupin	06:48:20	-47.0	Dark	Up	29.3	74.9	Low	06:33:20 - 07:03:20	12711
Sisters	06:48:27	-47.7	Dark	Up	28.8	74.2	Low	06:33:27 - 07:03:27	12642
Bend	06:48:26	-48.0	Dark	Up	28.9	74.2	Low	06:33:26 - 07:03:26	12611
Oregon Observatory	06:48:29	-48.1	Dark	Up	28.7	74.0	Low	06:33:29 - 07:03:29	12598
Chiloquin	06:48:35	-49.2	Dark	Up	28.1	73.1	Low	06:33:35 - 07:03:35	12484
Klamath Falls	06:48:37	-49.5	Dark	Up	28.1	73.0	Low	06:33:37 - 07:03:37	12448
Cedarville	06:48:36	-50.6	Dark	Up	29.0	73.5	Low	06:33:36 - 07:03:36	12326
Fall River/Burney	06:48:41	-50.7	Dark	Up	28.0	72.6	Low	06:33:41 - 07:03:41	12319
Greenville	06:48:43	-51.7	Dark	Up	28.1	72.4	Low	06:33:43 - 07:03:43	12214
Gimple	06:48:44	-51.7	Dark	Up	28.1	72.4	Low	06:33:44 - 07:03:44	12211
Quincy	06:48:45	-51.8	Dark	Up	28.0	72.3	Low	06:33:45 - 07:03:45	12194
Portola	06:48:44	-52.1	Dark	Up	28.3	72.5	Low	06:33:44 - 07:03:44	12165
Reno	06:48:43	-52.6	Dark	Up	28.7	72.7	Low	06:33:43 - 07:03:43	12117
Carson City	06:48:44	-52.9	Dark	Up	28.6	72.5	Low	06:33:44 - 07:03:44	12080
Gardnerville	06:48:45	-53.1	Dark	Up	28.6	72.4	Low	06:33:45 - 07:03:45	12054
Yerington	06:48:43	-53.3	Dark	Up	29.0	72.7	Low	06:33:43 - 07:03:43	12039
Hawthorne	06:48:43	-53.9	Dark	Up	29.3	72.7	Low	06:33:43 - 07:03:43	11974
Lee Vining	06:48:47	-54.2	Dark	Up	28.8	72.2	Low	06:33:47 - 07:03:47	11934
Bishop	06:48:46	-55.0	Dark	Up	29.1	72.2	Low	06:33:46 - 07:03:46	11849
Dunrhomin	06:47:40	-54.3	Dark	Up	39.6	80.7	Up	06:32:40 - 07:02:40	11765
Beatty	06:48:41	-55.9	Dark	Up	30.2	72.7	Up	06:33:41 - 07:03:41	11747
Nikitin	06:47:42	-54.5	Dark	Up	39.6	80.5	Up	06:32:42 - 07:02:42	11746
CU-SBO	06:47:42	-54.6	Dark	Up	39.5	80.4	Up	06:32:42 - 07:02:42	11741
Wildwood	06:48:56	-57.9	Dark	Up	27.9	70.5	Low	06:33:56 - 07:03:56	11524
Patrick	06:48:34	-58.1	Dark	Up	32.0	73.2	Up	06:33:34 - 07:03:34	11500
Laughlin/Bullhead City	06:48:38	-58.2	Dark	Up	31.4	72.7	Up	06:33:38 - 07:03:38	11498
Idyllwild	06:48:50	-58.9	Dark	Up	29.3	71.1	Low	06:33:50 - 07:03:50	11422
Lake Havasu City	06:48:35	-58.9	Dark	Up	31.4	72.4	Up	06:33:35 - 07:03:35	11420
Calipatria	06:48:48	-59.8	Dark	Up	30.0	71.2	Up	06:33:48 - 07:03:48	11319
George/Scottsdale	06:48:31	-60.2	Dark	Up	33.1	73.0	Up	06:33:31 - 07:03:31	11261
Yuma	06:48:45	-60.5	Dark	Up	30.6	71.3	Up	06:33:45 - 07:03:45	11244