RECON: TNO occultation with 470596

Event between (470596) 08NW4 and star GA0940:16769178 with event index number of 2270382

Geocentric closest approach at 2023/08/18 05:38:39 UTC

J2000 position of star is 21:49:24.6 +05:35:16
Equinox of date position of star is 21:50:35.5 +05:41:54
Stellar brightness G=9.4, use SENSEUP=2 with the MallinCam and and exposure time of 125 milli-seconds with the QHY174 camera.
Star is 155 degrees from the moon. Moon is 3% illuminated.
Apparent brightness V=21.3

[RECON map]
Object is 36.6 AU from the Sun and 35.6 AU from the Earth.
Apparent velocity is 24.2 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 61 seconds.
The 1-sigma cross-track error in the shadow position is 1418 km.
The sky-plane scale is 25849.2 km/arcsec.

The object has an absolute magnitude Hv=5.7
Diameter=424.6 km assuming a 5% albedo -- 18.0 sec chord
Diameter=173.4 km assuming a 30% albedo -- 7.3 sec chord
Dynamical classification is SCATNEAR

Star training set for 470596, (2023/08/18 05:40UT)
Object            RA         Dec     mag  sep  mel
Markab         23:05:56.4 +15:19:58  2.5 20.85 156
4 Peg          21:39:42.9 +05:52:46  5.9  2.71 153
PPM 172334     21:51:58.1 +05:53:07  8.3  0.39 155
PPM 172297     21:50:24.0 +05:50:01  9.2  0.14 155
PPM 172300     21:50:35.6 +05:41:55 10.6  0.00 155
470596         21:50:35.6 +05:41:55  9.4       155
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 20.1 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 05:39:28 -18.7 Dark Down 35.6 133.2 Up 05:33:52 - 05:45:04 10799

Kelowna 05:39:28 -19.6 Dark Down 36.6 133.8 Up 05:33:52 - 05:45:04 10732

Peachland 05:39:29 -19.6 Dark Down 36.5 133.4 Up 05:33:53 - 05:45:05 10730

Victoria 05:39:41 -19.1 Dark Down 35.6 128.9 Up 05:34:05 - 05:45:17 10722

Summerland 05:39:31 -19.8 Dark Down 36.7 133.4 Up 05:33:55 - 05:45:07 10719

Penticton 05:39:30 -19.9 Dark Down 36.8 133.5 Up 05:33:54 - 05:45:06 10713

Oliver 05:39:31 -20.2 Dark Down 37.0 133.3 Up 05:33:55 - 05:45:07 10690

Anarchist Mountain Observatory 05:39:30 -20.4 Dark Down 37.2 133.5 Up 05:33:54 - 05:45:06 10676

Okanogan 05:39:34 -20.8 Dark Down 37.6 132.9 Up 05:33:58 - 05:45:10 10638

Brewster 05:39:34 -20.9 Dark Down 37.7 132.5 Up 05:33:58 - 05:45:10 10624

Sleaford 05:38:50 -22.0 Dark Down 40.0 150.6 Up 05:33:14 - 05:44:26 10619

Manson/Chelan 05:39:35 -20.9 Dark Down 37.6 132.0 Up 05:33:59 - 05:45:11 10618

Wenatchee 05:39:37 -21.3 Dark Down 37.8 131.5 Up 05:34:01 - 05:45:13 10590

Ellensburg 05:39:39 -21.5 Dark Down 38.0 131.1 Up 05:34:03 - 05:45:15 10567

Yakima 05:39:41 -21.8 Dark Down 38.3 130.8 Up 05:34:05 - 05:45:17 10540

Toppenish/White Swan 05:39:41 -22.0 Dark Down 38.5 130.9 Up 05:34:05 - 05:45:17 10522

The Dalles 05:39:44 -22.3 Dark Down 38.6 129.6 Up 05:34:08 - 05:45:20 10485

PNWRO 05:39:38 -23.0 Dark Down 39.5 132.3 Up 05:34:02 - 05:45:14 10466

Maupin 05:39:46 -22.7 Dark Down 38.9 129.4 Up 05:34:10 - 05:45:22 10454

Sisters 05:39:48 -23.1 Dark Down 39.2 128.3 Up 05:34:12 - 05:45:24 10403

Bend 05:39:50 -23.4 Dark Down 39.5 128.5 Up 05:34:14 - 05:45:26 10381

Oregon Observatory 05:39:50 -23.5 Dark Down 39.5 128.2 Up 05:34:14 - 05:45:26 10371

Chiloquin 05:39:55 -24.3 Dark Down 40.1 126.9 Up 05:34:19 - 05:45:31 10286

Klamath Falls 05:39:55 -24.6 Dark Down 40.4 126.8 Up 05:34:19 - 05:45:31 10259

Cedarville 05:39:53 -25.9 Dark Down 41.7 128.0 Up 05:34:17 - 05:45:29 10173

Fall River/Burney 05:39:57 -25.7 Dark Down 41.3 126.4 Up 05:34:21 - 05:45:33 10163

Greenville 05:39:58 -26.6 Dark Down 42.1 126.2 Up 05:34:22 - 05:45:34 10085

Gimple 05:39:58 -26.7 Dark Down 42.2 126.3 Up 05:34:22 - 05:45:34 10083

Quincy 05:40:01 -26.8 Dark Down 42.2 126.1 Up 05:34:25 - 05:45:37 10070

Portola 05:39:58 -27.1 Dark Down 42.6 126.5 Up 05:34:22 - 05:45:34 10050

Reno 05:39:58 -27.6 Dark Down 43.2 127.0 Up 05:34:22 - 05:45:34 10014

Carson City 05:39:58 -27.9 Dark Down 43.4 126.7 Up 05:34:22 - 05:45:34 9986

Gardnerville 05:39:58 -28.1 Dark Down 43.6 126.6 Up 05:34:22 - 05:45:34 9966

Yerington 05:39:56 -28.4 Dark Down 43.9 127.2 Up 05:34:20 - 05:45:32 9956

Hawthorne 05:39:56 -29.0 Dark Down 44.5 127.5 Up 05:34:20 - 05:45:32 9908

Lee Vining 05:40:01 -29.2 Dark Down 44.6 126.5 Up 05:34:25 - 05:45:37 9875

Bishop 05:39:59 -30.0 Dark Down 45.4 126.8 Up 05:34:23 - 05:45:35 9809

Dunrhomin 05:39:13 -33.0 Dark Down 50.4 145.3 Up 05:33:37 - 05:44:49 9735

Beatty 05:39:55 -31.2 Dark Down 46.7 128.2 Up 05:34:19 - 05:45:31 9733

Nikitin 05:39:14 -33.2 Dark Down 50.5 145.2 Up 05:33:38 - 05:44:50 9721

CU-SBO 05:39:13 -33.2 Dark Down 50.5 145.0 Up 05:33:37 - 05:44:49 9717

Wildwood 05:40:08 -32.4 Dark Down 47.2 123.8 Up 05:34:32 - 05:45:44 9544

Patrick 05:39:50 -33.8 Dark Down 49.4 130.3 Up 05:34:14 - 05:45:26 9541

Laughlin/Bullhead City 05:39:53 -33.6 Dark Down 49.1 129.2 Up 05:34:17 - 05:45:29 9537

Lake Havasu City 05:39:54 -34.3 Dark Down 49.7 128.9 Up 05:34:18 - 05:45:30 9474

Idyllwild 05:40:02 -33.7 Dark Down 48.6 125.5 Up 05:34:26 - 05:45:38 9468

Calipatria 05:40:01 -34.8 Dark Down 49.8 126.3 Up 05:34:25 - 05:45:37 9386

George/Scottsdale 05:39:48 -36.1 Dark Down 51.8 131.1 Up 05:34:12 - 05:45:24 9346

Yuma 05:39:59 -35.6 Dark Down 50.6 126.9 Up 05:34:23 - 05:45:35 9326

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 470596, (2023/08/18 05:40UT)
Object            RA         Dec     mag  sep  mel
Markab         23:04:45.8 +15:12:18  2.5 20.85 156
4 Peg          21:38:32.1 +05:46:19  5.9  2.71 153
PPM 172334     21:50:47.2 +05:46:26  8.3  0.39 155
PPM 172297     21:49:13.0 +05:43:22  9.2  0.14 155
PPM 172300     21:49:24.6 +05:35:15 10.6  0.00 155
470596         21:49:24.6 +05:35:16  9.4       155
Positions are for J2000

Event circumstances last updated at 2023/08/07 02:52:19 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	05:39:28	-18.7	Dark	Down	35.6	133.2	Up	05:33:52 - 05:45:04	10799
Kelowna	05:39:28	-19.6	Dark	Down	36.6	133.8	Up	05:33:52 - 05:45:04	10732
Peachland	05:39:29	-19.6	Dark	Down	36.5	133.4	Up	05:33:53 - 05:45:05	10730
Victoria	05:39:41	-19.1	Dark	Down	35.6	128.9	Up	05:34:05 - 05:45:17	10722
Summerland	05:39:31	-19.8	Dark	Down	36.7	133.4	Up	05:33:55 - 05:45:07	10719
Penticton	05:39:30	-19.9	Dark	Down	36.8	133.5	Up	05:33:54 - 05:45:06	10713
Oliver	05:39:31	-20.2	Dark	Down	37.0	133.3	Up	05:33:55 - 05:45:07	10690
Anarchist Mountain Observatory	05:39:30	-20.4	Dark	Down	37.2	133.5	Up	05:33:54 - 05:45:06	10676
Okanogan	05:39:34	-20.8	Dark	Down	37.6	132.9	Up	05:33:58 - 05:45:10	10638
Brewster	05:39:34	-20.9	Dark	Down	37.7	132.5	Up	05:33:58 - 05:45:10	10624
Sleaford	05:38:50	-22.0	Dark	Down	40.0	150.6	Up	05:33:14 - 05:44:26	10619
Manson/Chelan	05:39:35	-20.9	Dark	Down	37.6	132.0	Up	05:33:59 - 05:45:11	10618
Wenatchee	05:39:37	-21.3	Dark	Down	37.8	131.5	Up	05:34:01 - 05:45:13	10590
Ellensburg	05:39:39	-21.5	Dark	Down	38.0	131.1	Up	05:34:03 - 05:45:15	10567
Yakima	05:39:41	-21.8	Dark	Down	38.3	130.8	Up	05:34:05 - 05:45:17	10540
Toppenish/White Swan	05:39:41	-22.0	Dark	Down	38.5	130.9	Up	05:34:05 - 05:45:17	10522
The Dalles	05:39:44	-22.3	Dark	Down	38.6	129.6	Up	05:34:08 - 05:45:20	10485
PNWRO	05:39:38	-23.0	Dark	Down	39.5	132.3	Up	05:34:02 - 05:45:14	10466
Maupin	05:39:46	-22.7	Dark	Down	38.9	129.4	Up	05:34:10 - 05:45:22	10454
Sisters	05:39:48	-23.1	Dark	Down	39.2	128.3	Up	05:34:12 - 05:45:24	10403
Bend	05:39:50	-23.4	Dark	Down	39.5	128.5	Up	05:34:14 - 05:45:26	10381
Oregon Observatory	05:39:50	-23.5	Dark	Down	39.5	128.2	Up	05:34:14 - 05:45:26	10371
Chiloquin	05:39:55	-24.3	Dark	Down	40.1	126.9	Up	05:34:19 - 05:45:31	10286
Klamath Falls	05:39:55	-24.6	Dark	Down	40.4	126.8	Up	05:34:19 - 05:45:31	10259
Cedarville	05:39:53	-25.9	Dark	Down	41.7	128.0	Up	05:34:17 - 05:45:29	10173
Fall River/Burney	05:39:57	-25.7	Dark	Down	41.3	126.4	Up	05:34:21 - 05:45:33	10163
Greenville	05:39:58	-26.6	Dark	Down	42.1	126.2	Up	05:34:22 - 05:45:34	10085
Gimple	05:39:58	-26.7	Dark	Down	42.2	126.3	Up	05:34:22 - 05:45:34	10083
Quincy	05:40:01	-26.8	Dark	Down	42.2	126.1	Up	05:34:25 - 05:45:37	10070
Portola	05:39:58	-27.1	Dark	Down	42.6	126.5	Up	05:34:22 - 05:45:34	10050
Reno	05:39:58	-27.6	Dark	Down	43.2	127.0	Up	05:34:22 - 05:45:34	10014
Carson City	05:39:58	-27.9	Dark	Down	43.4	126.7	Up	05:34:22 - 05:45:34	9986
Gardnerville	05:39:58	-28.1	Dark	Down	43.6	126.6	Up	05:34:22 - 05:45:34	9966
Yerington	05:39:56	-28.4	Dark	Down	43.9	127.2	Up	05:34:20 - 05:45:32	9956
Hawthorne	05:39:56	-29.0	Dark	Down	44.5	127.5	Up	05:34:20 - 05:45:32	9908
Lee Vining	05:40:01	-29.2	Dark	Down	44.6	126.5	Up	05:34:25 - 05:45:37	9875
Bishop	05:39:59	-30.0	Dark	Down	45.4	126.8	Up	05:34:23 - 05:45:35	9809
Dunrhomin	05:39:13	-33.0	Dark	Down	50.4	145.3	Up	05:33:37 - 05:44:49	9735
Beatty	05:39:55	-31.2	Dark	Down	46.7	128.2	Up	05:34:19 - 05:45:31	9733
Nikitin	05:39:14	-33.2	Dark	Down	50.5	145.2	Up	05:33:38 - 05:44:50	9721
CU-SBO	05:39:13	-33.2	Dark	Down	50.5	145.0	Up	05:33:37 - 05:44:49	9717
Wildwood	05:40:08	-32.4	Dark	Down	47.2	123.8	Up	05:34:32 - 05:45:44	9544
Patrick	05:39:50	-33.8	Dark	Down	49.4	130.3	Up	05:34:14 - 05:45:26	9541
Laughlin/Bullhead City	05:39:53	-33.6	Dark	Down	49.1	129.2	Up	05:34:17 - 05:45:29	9537
Lake Havasu City	05:39:54	-34.3	Dark	Down	49.7	128.9	Up	05:34:18 - 05:45:30	9474
Idyllwild	05:40:02	-33.7	Dark	Down	48.6	125.5	Up	05:34:26 - 05:45:38	9468
Calipatria	05:40:01	-34.8	Dark	Down	49.8	126.3	Up	05:34:25 - 05:45:37	9386
George/Scottsdale	05:39:48	-36.1	Dark	Down	51.8	131.1	Up	05:34:12 - 05:45:24	9346
Yuma	05:39:59	-35.6	Dark	Down	50.6	126.9	Up	05:34:23 - 05:45:35	9326