RECON: TNO occultation with 38628

Event between (38628) Huya and star GA0820:05986307 with event index number of 2432841

Geocentric closest approach at 2024/07/09 05:36:28 UTC

J2000 position of star is 17:25:47.5 -07:13:20
Equinox of date position of star is 17:27:06.7 -07:14:32
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 113 degrees from the moon. Moon is 11% illuminated.
Apparent brightness V=19.5

[RECON map]
Object is 29.1 AU from the Sun and 28.2 AU from the Earth.
Apparent velocity is 20.5 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 64 seconds.
The 1-sigma cross-track error in the shadow position is 1051 km.
The sky-plane scale is 20469.7 km/arcsec.

The object has an absolute magnitude Hv=4.8
Diameter=648.7 km assuming a 5% albedo -- 32.1 sec chord
Diameter=264.8 km assuming a 30% albedo -- 13.1 sec chord
Dynamical classification is 3:2E+6:4II

Star training set for 38628, (2024/07/09 05:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:54.9 -26:29:03  0.9 23.43 104
35Eta Oph      17:11:47.2 -15:45:13  2.6  9.30 111
PPM 200559     17:21:18.4 -05:56:31  6.5  1.94 111
PPM 200650     17:27:18.6 -06:36:06  7.4  0.64 113
PPM 200662     17:28:02.6 -07:08:26  9.6  0.25 113
38628          17:27:07.0 -07:14:32 16.5       114
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 0.0 km RECON observability=0.6 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 05:36:32 -9.9 NT Up 31.5 168.3 Up 05:30:42 - 05:42:22 11383

Sleaford 05:35:43 -12.9 AT Down 30.6 184.9 Up 05:29:53 - 05:41:33 11355

Kelowna 05:36:30 -10.9 NT Up 32.4 169.3 Up 05:30:40 - 05:42:20 11330

Peachland 05:36:31 -10.8 NT Up 32.4 168.9 Up 05:30:41 - 05:42:21 11326

Summerland 05:36:31 -11.0 NT Up 32.6 169.0 Up 05:30:41 - 05:42:21 11316

Penticton 05:36:31 -11.1 NT Up 32.7 169.1 Up 05:30:41 - 05:42:21 11312

Oliver 05:36:31 -11.4 NT Up 33.0 169.1 Up 05:30:41 - 05:42:21 11291

Anarchist Mountain Observatory 05:36:30 -11.6 NT Up 33.2 169.3 Up 05:30:40 - 05:42:20 11280

Victoria 05:36:45 -10.5 NT Up 33.1 164.5 Up 05:30:55 - 05:42:35 11276

Okanogan 05:36:32 -12.1 AT Up 33.8 168.9 Up 05:30:42 - 05:42:22 11242

Brewster 05:36:33 -12.2 AT Up 34.1 168.7 Up 05:30:43 - 05:42:23 11226

Manson/Chelan 05:36:34 -12.2 AT Up 34.2 168.2 Up 05:30:44 - 05:42:24 11216

Wenatchee 05:36:35 -12.6 AT Up 34.7 167.9 Up 05:30:45 - 05:42:25 11188

Ellensburg 05:36:38 -12.8 AT Up 35.0 167.6 Up 05:30:48 - 05:42:28 11164

Yakima 05:36:37 -13.1 AT Up 35.4 167.5 Up 05:30:47 - 05:42:27 11138

Toppenish/White Swan 05:36:37 -13.4 AT Up 35.7 167.7 Up 05:30:47 - 05:42:27 11123

PNWRO 05:36:32 -14.3 AT Up 36.2 169.5 Up 05:30:42 - 05:42:22 11089

The Dalles 05:36:41 -13.7 AT Up 36.3 166.7 Up 05:30:51 - 05:42:31 11078

Maupin 05:36:41 -14.1 AT Up 36.7 166.7 Up 05:30:51 - 05:42:31 11050

Sisters 05:36:43 -14.6 AT Up 37.5 166.0 Up 05:30:53 - 05:42:33 10996

Bend 05:36:43 -14.9 AT Up 37.8 166.2 Up 05:30:53 - 05:42:33 10978

Oregon Observatory 05:36:44 -15.0 AT Up 37.9 166.0 Up 05:30:54 - 05:42:34 10967

Chiloquin 05:36:47 -15.8 AT Up 39.1 165.3 Up 05:30:57 - 05:42:37 10880

Klamath Falls 05:36:48 -16.2 AT Up 39.5 165.3 Up 05:30:58 - 05:42:38 10855

Cedarville 05:36:42 -17.4 AT Up 40.4 167.2 Up 05:30:52 - 05:42:32 10794

Fall River/Burney 05:36:47 -17.3 AT Up 40.7 165.5 Up 05:30:57 - 05:42:37 10769

Greenville 05:36:46 -18.2 Dark Up 41.6 165.9 Up 05:30:56 - 05:42:36 10699

Gimple 05:36:46 -18.2 Dark Up 41.7 166.0 Up 05:30:56 - 05:42:36 10699

Quincy 05:36:46 -18.4 Dark Up 41.8 165.9 Up 05:30:56 - 05:42:36 10684

Portola 05:36:44 -18.7 Dark Up 42.1 166.5 Up 05:30:54 - 05:42:34 10672

Reno 05:36:42 -19.2 Dark Up 42.4 167.3 Up 05:30:52 - 05:42:32 10647

Carson City 05:36:42 -19.5 Dark Up 42.8 167.2 Up 05:30:52 - 05:42:32 10620

Gardnerville 05:36:43 -19.7 Dark Up 43.0 167.2 Up 05:30:53 - 05:42:33 10601

Yerington 05:36:40 -19.9 Dark Up 43.1 168.0 Up 05:30:50 - 05:42:30 10600

Dunrhomin 05:35:42 -24.0 Dark Down 42.3 186.7 Up 05:29:52 - 05:41:32 10563

Hawthorne 05:36:38 -20.5 Dark Down 43.6 168.6 Up 05:30:48 - 05:42:28 10561

Nikitin 05:35:42 -24.2 Dark Down 42.5 186.7 Up 05:29:52 - 05:41:32 10549

CU-SBO 05:35:43 -24.2 Dark Down 42.6 186.6 Up 05:29:53 - 05:41:33 10545

Lee Vining 05:36:41 -20.8 Dark Down 44.1 167.9 Up 05:30:51 - 05:42:31 10522

Bishop 05:36:38 -21.6 Dark Down 44.8 168.7 Up 05:30:48 - 05:42:28 10470

Beatty 05:36:32 -22.7 Dark Down 45.5 170.9 Up 05:30:42 - 05:42:22 10419

Patrick 05:36:21 -25.2 Dark Down 47.2 174.8 Up 05:30:31 - 05:42:11 10274

Laughlin/Bullhead City 05:36:24 -25.1 Dark Down 47.4 173.7 Up 05:30:34 - 05:42:14 10260

Wildwood 05:36:42 -24.2 Dark Down 48.0 167.8 Up 05:30:52 - 05:42:32 10211

Lake Havasu City 05:36:23 -25.8 Dark Down 48.1 174.0 Up 05:30:33 - 05:42:13 10203

Idyllwild 05:36:35 -25.3 Dark Down 48.6 170.4 Up 05:30:45 - 05:42:25 10165

George/Scottsdale 05:36:13 -27.5 Dark Down 49.0 177.6 Up 05:30:23 - 05:42:03 10115

Calipatria 05:36:30 -26.4 Dark Down 49.4 172.1 Up 05:30:40 - 05:42:20 10102

Yuma 05:36:26 -27.2 Dark Down 49.9 173.4 Up 05:30:36 - 05:42:16 10057

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 38628, (2024/07/09 05:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.43 104
35Eta Oph      17:10:22.7 -15:43:29  2.6  9.30 111
PPM 200559     17:19:59.6 -05:55:07  6.5  1.94 111
PPM 200650     17:25:59.5 -06:34:55  7.4  0.64 113
PPM 200662     17:26:43.2 -07:07:16  9.6  0.25 113
38628          17:25:47.5 -07:13:20 16.5       113
Positions are for J2000

Event circumstances last updated at 2024/06/11 03:48:05 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	05:36:32	-9.9	NT	Up	31.5	168.3	Up	05:30:42 - 05:42:22	11383
Sleaford	05:35:43	-12.9	AT	Down	30.6	184.9	Up	05:29:53 - 05:41:33	11355
Kelowna	05:36:30	-10.9	NT	Up	32.4	169.3	Up	05:30:40 - 05:42:20	11330
Peachland	05:36:31	-10.8	NT	Up	32.4	168.9	Up	05:30:41 - 05:42:21	11326
Summerland	05:36:31	-11.0	NT	Up	32.6	169.0	Up	05:30:41 - 05:42:21	11316
Penticton	05:36:31	-11.1	NT	Up	32.7	169.1	Up	05:30:41 - 05:42:21	11312
Oliver	05:36:31	-11.4	NT	Up	33.0	169.1	Up	05:30:41 - 05:42:21	11291
Anarchist Mountain Observatory	05:36:30	-11.6	NT	Up	33.2	169.3	Up	05:30:40 - 05:42:20	11280
Victoria	05:36:45	-10.5	NT	Up	33.1	164.5	Up	05:30:55 - 05:42:35	11276
Okanogan	05:36:32	-12.1	AT	Up	33.8	168.9	Up	05:30:42 - 05:42:22	11242
Brewster	05:36:33	-12.2	AT	Up	34.1	168.7	Up	05:30:43 - 05:42:23	11226
Manson/Chelan	05:36:34	-12.2	AT	Up	34.2	168.2	Up	05:30:44 - 05:42:24	11216
Wenatchee	05:36:35	-12.6	AT	Up	34.7	167.9	Up	05:30:45 - 05:42:25	11188
Ellensburg	05:36:38	-12.8	AT	Up	35.0	167.6	Up	05:30:48 - 05:42:28	11164
Yakima	05:36:37	-13.1	AT	Up	35.4	167.5	Up	05:30:47 - 05:42:27	11138
Toppenish/White Swan	05:36:37	-13.4	AT	Up	35.7	167.7	Up	05:30:47 - 05:42:27	11123
PNWRO	05:36:32	-14.3	AT	Up	36.2	169.5	Up	05:30:42 - 05:42:22	11089
The Dalles	05:36:41	-13.7	AT	Up	36.3	166.7	Up	05:30:51 - 05:42:31	11078
Maupin	05:36:41	-14.1	AT	Up	36.7	166.7	Up	05:30:51 - 05:42:31	11050
Sisters	05:36:43	-14.6	AT	Up	37.5	166.0	Up	05:30:53 - 05:42:33	10996
Bend	05:36:43	-14.9	AT	Up	37.8	166.2	Up	05:30:53 - 05:42:33	10978
Oregon Observatory	05:36:44	-15.0	AT	Up	37.9	166.0	Up	05:30:54 - 05:42:34	10967
Chiloquin	05:36:47	-15.8	AT	Up	39.1	165.3	Up	05:30:57 - 05:42:37	10880
Klamath Falls	05:36:48	-16.2	AT	Up	39.5	165.3	Up	05:30:58 - 05:42:38	10855
Cedarville	05:36:42	-17.4	AT	Up	40.4	167.2	Up	05:30:52 - 05:42:32	10794
Fall River/Burney	05:36:47	-17.3	AT	Up	40.7	165.5	Up	05:30:57 - 05:42:37	10769
Greenville	05:36:46	-18.2	Dark	Up	41.6	165.9	Up	05:30:56 - 05:42:36	10699
Gimple	05:36:46	-18.2	Dark	Up	41.7	166.0	Up	05:30:56 - 05:42:36	10699
Quincy	05:36:46	-18.4	Dark	Up	41.8	165.9	Up	05:30:56 - 05:42:36	10684
Portola	05:36:44	-18.7	Dark	Up	42.1	166.5	Up	05:30:54 - 05:42:34	10672
Reno	05:36:42	-19.2	Dark	Up	42.4	167.3	Up	05:30:52 - 05:42:32	10647
Carson City	05:36:42	-19.5	Dark	Up	42.8	167.2	Up	05:30:52 - 05:42:32	10620
Gardnerville	05:36:43	-19.7	Dark	Up	43.0	167.2	Up	05:30:53 - 05:42:33	10601
Yerington	05:36:40	-19.9	Dark	Up	43.1	168.0	Up	05:30:50 - 05:42:30	10600
Dunrhomin	05:35:42	-24.0	Dark	Down	42.3	186.7	Up	05:29:52 - 05:41:32	10563
Hawthorne	05:36:38	-20.5	Dark	Down	43.6	168.6	Up	05:30:48 - 05:42:28	10561
Nikitin	05:35:42	-24.2	Dark	Down	42.5	186.7	Up	05:29:52 - 05:41:32	10549
CU-SBO	05:35:43	-24.2	Dark	Down	42.6	186.6	Up	05:29:53 - 05:41:33	10545
Lee Vining	05:36:41	-20.8	Dark	Down	44.1	167.9	Up	05:30:51 - 05:42:31	10522
Bishop	05:36:38	-21.6	Dark	Down	44.8	168.7	Up	05:30:48 - 05:42:28	10470
Beatty	05:36:32	-22.7	Dark	Down	45.5	170.9	Up	05:30:42 - 05:42:22	10419
Patrick	05:36:21	-25.2	Dark	Down	47.2	174.8	Up	05:30:31 - 05:42:11	10274
Laughlin/Bullhead City	05:36:24	-25.1	Dark	Down	47.4	173.7	Up	05:30:34 - 05:42:14	10260
Wildwood	05:36:42	-24.2	Dark	Down	48.0	167.8	Up	05:30:52 - 05:42:32	10211
Lake Havasu City	05:36:23	-25.8	Dark	Down	48.1	174.0	Up	05:30:33 - 05:42:13	10203
Idyllwild	05:36:35	-25.3	Dark	Down	48.6	170.4	Up	05:30:45 - 05:42:25	10165
George/Scottsdale	05:36:13	-27.5	Dark	Down	49.0	177.6	Up	05:30:23 - 05:42:03	10115
Calipatria	05:36:30	-26.4	Dark	Down	49.4	172.1	Up	05:30:40 - 05:42:20	10102
Yuma	05:36:26	-27.2	Dark	Down	49.9	173.4	Up	05:30:36 - 05:42:16	10057