RECON: TNO occultation with 523749

Event between (523749) 14UR224 and star GA1080:01164686 with event index number of 2372775

Geocentric closest approach at 2027/11/16 07:40:10 UTC

J2000 position of star is 05:36:31.7 +19:39:15
Equinox of date position of star is 05:37:56.8 +19:40:03
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 8 degrees from the moon. Moon is 94% illuminated.
Apparent brightness V=21.6

[RECON map]
Object is 39.3 AU from the Sun and 38.5 AU from the Earth.
Apparent velocity is 20.9 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 133 seconds.
The 1-sigma cross-track error in the shadow position is 1572 km.
The sky-plane scale is 27890.0 km/arcsec.

The object has an absolute magnitude Hv=5.6
Diameter=457.1 km assuming a 5% albedo -- 22.3 sec chord
Diameter=186.6 km assuming a 30% albedo -- 9.1 sec chord
Dynamical classification is SCATNEAR

Star training set for 523749, (2027/11/16 07:39UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:40.9 +07:24:35  0.4 13.06  21
Alnath         05:28:03.4 +28:37:43  1.6  9.25   2
PPM 094484     05:35:18.4 +20:29:29  6.0  1.06   7
PPM 121197     05:39:13.5 +19:47:38  8.5  0.28   8
523749         05:38:10.6 +19:40:11 16.1         8
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 27.0 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 07:41:38 -58.0 Dark Up 49.1 126.7 Up 07:30:06 - 07:53:11 8978

Kelowna 07:41:39 -58.8 Dark Up 50.0 127.0 Up 07:30:06 - 07:53:11 8891

Peachland 07:41:39 -58.9 Dark Up 49.9 126.5 Up 07:30:07 - 07:53:12 8887

Summerland 07:41:38 -59.1 Dark Up 50.1 126.5 Up 07:30:06 - 07:53:11 8873

Penticton 07:41:40 -59.2 Dark Up 50.2 126.6 Up 07:30:07 - 07:53:12 8865

Victoria 07:41:54 -60.0 Dark Up 48.7 121.1 Up 07:30:22 - 07:53:27 8862

Oliver 07:41:41 -59.5 Dark Up 50.4 126.2 Up 07:30:08 - 07:53:13 8835

Sleaford 07:40:54 -55.1 Dark Up 54.1 147.3 Up 07:29:21 - 07:52:26 8834

Anarchist Mountain Observatory 07:41:41 -59.7 Dark Up 50.6 126.3 Up 07:30:09 - 07:53:14 8816

Okanogan 07:41:43 -60.3 Dark Up 50.8 125.4 Up 07:30:10 - 07:53:15 8765

Brewster 07:41:44 -60.6 Dark Up 50.9 124.9 Up 07:30:12 - 07:53:17 8746

Manson/Chelan 07:41:45 -60.8 Dark Up 50.8 124.3 Up 07:30:13 - 07:53:18 8736

Wenatchee 07:41:47 -61.3 Dark Up 51.0 123.6 Up 07:30:15 - 07:53:20 8698

Ellensburg 07:41:49 -61.7 Dark Up 51.1 122.9 Up 07:30:17 - 07:53:22 8667

Yakima 07:41:51 -62.1 Dark Up 51.3 122.5 Up 07:30:18 - 07:53:23 8631

Toppenish/White Swan 07:41:51 -62.3 Dark Up 51.5 122.4 Up 07:30:18 - 07:53:23 8609

The Dalles 07:41:56 -63.1 Dark Up 51.5 120.7 Up 07:30:23 - 07:53:28 8558

PNWRO 07:41:47 -62.7 Dark Up 52.6 123.8 Up 07:30:15 - 07:53:20 8543

Maupin 07:41:55 -63.5 Dark Up 51.7 120.3 Up 07:30:23 - 07:53:28 8518

Sisters 07:42:00 -64.3 Dark Up 51.9 118.8 Up 07:30:28 - 07:53:33 8451

Bend 07:42:00 -64.6 Dark Up 52.2 118.9 Up 07:30:27 - 07:53:32 8423

Oregon Observatory 07:42:00 -64.8 Dark Up 52.2 118.5 Up 07:30:28 - 07:53:33 8411

Chiloquin 07:42:05 -66.0 Dark Up 52.5 116.6 Up 07:30:32 - 07:53:37 8301

Klamath Falls 07:42:06 -66.4 Dark Up 52.7 116.2 Up 07:30:33 - 07:53:38 8268

Cedarville 07:42:03 -67.2 Dark Up 54.1 117.2 Up 07:30:31 - 07:53:36 8165

Fall River/Burney 07:42:08 -67.6 Dark Up 53.5 115.3 Up 07:30:35 - 07:53:40 8149

Greenville 07:42:09 -68.5 Dark Up 54.2 114.6 Up 07:30:37 - 07:53:42 8054

Gimple 07:42:09 -68.5 Dark Up 54.2 114.7 Up 07:30:36 - 07:53:41 8051

Quincy 07:42:09 -68.7 Dark Up 54.3 114.4 Up 07:30:36 - 07:53:41 8034

Portola 07:42:08 -68.9 Dark Up 54.7 114.7 Up 07:30:35 - 07:53:40 8011

Reno 07:42:07 -69.2 Dark Up 55.2 115.1 Up 07:30:34 - 07:53:39 7970

Carson City 07:42:07 -69.5 Dark Up 55.4 114.7 Up 07:30:35 - 07:53:40 7935

Gardnerville 07:42:08 -69.8 Dark Up 55.5 114.4 Up 07:30:35 - 07:53:40 7910

Yerington 07:42:05 -69.7 Dark Up 55.9 115.1 Up 07:30:33 - 07:53:38 7901

Hawthorne 07:42:06 -70.2 Dark Up 56.5 115.1 Up 07:30:33 - 07:53:38 7843

Lee Vining 07:42:08 -70.7 Dark Up 56.4 113.8 Up 07:30:36 - 07:53:41 7801

Bishop 07:42:07 -71.3 Dark Up 57.1 113.7 Up 07:30:34 - 07:53:39 7725

Dunrhomin 07:41:14 -65.3 Dark Up 63.8 136.4 Up 07:29:41 - 07:52:46 7714

Nikitin 07:41:13 -65.5 Dark Up 64.0 136.1 Up 07:29:41 - 07:52:46 7696

CU-SBO 07:41:16 -65.6 Dark Up 64.0 135.9 Up 07:29:43 - 07:52:48 7691

Beatty 07:42:02 -71.7 Dark Up 58.5 114.9 Up 07:30:30 - 07:53:35 7639

Patrick 07:41:55 -72.6 Dark Up 61.2 115.9 Up 07:30:22 - 07:53:27 7421

Laughlin/Bullhead City 07:41:58 -73.0 Dark Up 60.8 114.7 Up 07:30:25 - 07:53:30 7414

Wildwood 07:42:14 -74.6 Dark Up 58.2 108.7 Up 07:30:42 - 07:53:47 7409

Lake Havasu City 07:41:58 -73.6 Dark Up 61.3 113.9 Up 07:30:26 - 07:53:31 7340

Idyllwild 07:42:08 -74.8 Dark Up 59.8 110.0 Up 07:30:36 - 07:53:41 7324

Calipatria 07:42:06 -75.2 Dark Up 60.9 110.3 Up 07:30:34 - 07:53:39 7232

George/Scottsdale 07:41:51 -73.6 Dark Up 63.5 115.5 Up 07:30:19 - 07:53:24 7202

Yuma 07:42:04 -75.4 Dark Up 61.8 110.5 Up 07:30:32 - 07:53:37 7166

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 523749, (2027/11/16 07:39UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 13.06  21
Alnath         05:26:17.6 +28:36:23  1.6  9.25   2
PPM 094484     05:33:38.8 +20:28:26  6.0  1.06   7
PPM 121197     05:37:34.4 +19:46:46  8.5  0.28   8
523749         05:36:31.7 +19:39:15 16.1         8
Positions are for J2000

Event circumstances last updated at 2023/12/23 04:36:05 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	07:41:38	-58.0	Dark	Up	49.1	126.7	Up	07:30:06 - 07:53:11	8978
Kelowna	07:41:39	-58.8	Dark	Up	50.0	127.0	Up	07:30:06 - 07:53:11	8891
Peachland	07:41:39	-58.9	Dark	Up	49.9	126.5	Up	07:30:07 - 07:53:12	8887
Summerland	07:41:38	-59.1	Dark	Up	50.1	126.5	Up	07:30:06 - 07:53:11	8873
Penticton	07:41:40	-59.2	Dark	Up	50.2	126.6	Up	07:30:07 - 07:53:12	8865
Victoria	07:41:54	-60.0	Dark	Up	48.7	121.1	Up	07:30:22 - 07:53:27	8862
Oliver	07:41:41	-59.5	Dark	Up	50.4	126.2	Up	07:30:08 - 07:53:13	8835
Sleaford	07:40:54	-55.1	Dark	Up	54.1	147.3	Up	07:29:21 - 07:52:26	8834
Anarchist Mountain Observatory	07:41:41	-59.7	Dark	Up	50.6	126.3	Up	07:30:09 - 07:53:14	8816
Okanogan	07:41:43	-60.3	Dark	Up	50.8	125.4	Up	07:30:10 - 07:53:15	8765
Brewster	07:41:44	-60.6	Dark	Up	50.9	124.9	Up	07:30:12 - 07:53:17	8746
Manson/Chelan	07:41:45	-60.8	Dark	Up	50.8	124.3	Up	07:30:13 - 07:53:18	8736
Wenatchee	07:41:47	-61.3	Dark	Up	51.0	123.6	Up	07:30:15 - 07:53:20	8698
Ellensburg	07:41:49	-61.7	Dark	Up	51.1	122.9	Up	07:30:17 - 07:53:22	8667
Yakima	07:41:51	-62.1	Dark	Up	51.3	122.5	Up	07:30:18 - 07:53:23	8631
Toppenish/White Swan	07:41:51	-62.3	Dark	Up	51.5	122.4	Up	07:30:18 - 07:53:23	8609
The Dalles	07:41:56	-63.1	Dark	Up	51.5	120.7	Up	07:30:23 - 07:53:28	8558
PNWRO	07:41:47	-62.7	Dark	Up	52.6	123.8	Up	07:30:15 - 07:53:20	8543
Maupin	07:41:55	-63.5	Dark	Up	51.7	120.3	Up	07:30:23 - 07:53:28	8518
Sisters	07:42:00	-64.3	Dark	Up	51.9	118.8	Up	07:30:28 - 07:53:33	8451
Bend	07:42:00	-64.6	Dark	Up	52.2	118.9	Up	07:30:27 - 07:53:32	8423
Oregon Observatory	07:42:00	-64.8	Dark	Up	52.2	118.5	Up	07:30:28 - 07:53:33	8411
Chiloquin	07:42:05	-66.0	Dark	Up	52.5	116.6	Up	07:30:32 - 07:53:37	8301
Klamath Falls	07:42:06	-66.4	Dark	Up	52.7	116.2	Up	07:30:33 - 07:53:38	8268
Cedarville	07:42:03	-67.2	Dark	Up	54.1	117.2	Up	07:30:31 - 07:53:36	8165
Fall River/Burney	07:42:08	-67.6	Dark	Up	53.5	115.3	Up	07:30:35 - 07:53:40	8149
Greenville	07:42:09	-68.5	Dark	Up	54.2	114.6	Up	07:30:37 - 07:53:42	8054
Gimple	07:42:09	-68.5	Dark	Up	54.2	114.7	Up	07:30:36 - 07:53:41	8051
Quincy	07:42:09	-68.7	Dark	Up	54.3	114.4	Up	07:30:36 - 07:53:41	8034
Portola	07:42:08	-68.9	Dark	Up	54.7	114.7	Up	07:30:35 - 07:53:40	8011
Reno	07:42:07	-69.2	Dark	Up	55.2	115.1	Up	07:30:34 - 07:53:39	7970
Carson City	07:42:07	-69.5	Dark	Up	55.4	114.7	Up	07:30:35 - 07:53:40	7935
Gardnerville	07:42:08	-69.8	Dark	Up	55.5	114.4	Up	07:30:35 - 07:53:40	7910
Yerington	07:42:05	-69.7	Dark	Up	55.9	115.1	Up	07:30:33 - 07:53:38	7901
Hawthorne	07:42:06	-70.2	Dark	Up	56.5	115.1	Up	07:30:33 - 07:53:38	7843
Lee Vining	07:42:08	-70.7	Dark	Up	56.4	113.8	Up	07:30:36 - 07:53:41	7801
Bishop	07:42:07	-71.3	Dark	Up	57.1	113.7	Up	07:30:34 - 07:53:39	7725
Dunrhomin	07:41:14	-65.3	Dark	Up	63.8	136.4	Up	07:29:41 - 07:52:46	7714
Nikitin	07:41:13	-65.5	Dark	Up	64.0	136.1	Up	07:29:41 - 07:52:46	7696
CU-SBO	07:41:16	-65.6	Dark	Up	64.0	135.9	Up	07:29:43 - 07:52:48	7691
Beatty	07:42:02	-71.7	Dark	Up	58.5	114.9	Up	07:30:30 - 07:53:35	7639
Patrick	07:41:55	-72.6	Dark	Up	61.2	115.9	Up	07:30:22 - 07:53:27	7421
Laughlin/Bullhead City	07:41:58	-73.0	Dark	Up	60.8	114.7	Up	07:30:25 - 07:53:30	7414
Wildwood	07:42:14	-74.6	Dark	Up	58.2	108.7	Up	07:30:42 - 07:53:47	7409
Lake Havasu City	07:41:58	-73.6	Dark	Up	61.3	113.9	Up	07:30:26 - 07:53:31	7340
Idyllwild	07:42:08	-74.8	Dark	Up	59.8	110.0	Up	07:30:36 - 07:53:41	7324
Calipatria	07:42:06	-75.2	Dark	Up	60.9	110.3	Up	07:30:34 - 07:53:39	7232
George/Scottsdale	07:41:51	-73.6	Dark	Up	63.5	115.5	Up	07:30:19 - 07:53:24	7202
Yuma	07:42:04	-75.4	Dark	Up	61.8	110.5	Up	07:30:32 - 07:53:37	7166