RECON: TNO occultation with 450265

Event between (450265) 03WU172 and star GA1140:02927253 with event index number of 2289016

Geocentric closest approach at 2023/02/12 06:11:43 UTC

J2000 position of star is 07:45:25.0 +25:26:15
Equinox of date position of star is 07:46:49.2 +25:22:48
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 103 degrees from the moon. Moon is 65% illuminated.
Apparent brightness V=21.0

[RECON map]
Object is 29.2 AU from the Sun and 28.3 AU from the Earth.
Apparent velocity is 20.3 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 76 seconds.
The 1-sigma cross-track error in the shadow position is 1059 km.
The sky-plane scale is 20539.5 km/arcsec.

The object has an absolute magnitude Hv=6.3
Diameter=322.1 km assuming a 5% albedo -- 15.9 sec chord
Diameter=131.5 km assuming a 30% albedo -- 6.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 450265, (2023/02/12 06:12UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.7 +27:58:07  1.1  2.59 103
77Kap Gem      07:45:50.4 +24:20:26  3.6  1.06 103
76 Gem         07:45:31.3 +25:43:38  6.6  0.45 103
450265         07:46:49.2 +25:22:48 15.7       102
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 35.0 km RECON observability=1.0 and success probability=28.7%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	06:11:20	-49.4	Dark	Down	61.7	204.5	Up	06:04:32 - 06:18:07	2847
Kamloops	06:12:07	-45.4	Dark	Down	64.7	176.5	Up	06:05:19 - 06:18:54	2549
Kelowna	06:12:03	-46.4	Dark	Down	65.6	178.3	Up	06:05:16 - 06:18:51	2475
Peachland	06:12:04	-46.4	Dark	Down	65.7	177.7	Up	06:05:17 - 06:18:52	2461
Summerland	06:12:04	-46.5	Dark	Down	65.8	177.9	Up	06:05:16 - 06:18:51	2447
Penticton	06:12:03	-46.6	Dark	Down	65.9	178.1	Up	06:05:16 - 06:18:51	2441
Oliver	06:12:03	-46.8	Dark	Down	66.2	178.1	Up	06:05:16 - 06:18:51	2405
Anarchist Mountain Observatory	06:12:02	-47.1	Dark	Down	66.4	178.5	Up	06:05:15 - 06:18:50	2390
Okanogan	06:12:03	-47.4	Dark	Down	67.1	177.9	Up	06:05:15 - 06:18:50	2322
Victoria	06:12:17	-45.4	Dark	Down	66.6	169.3	Up	06:05:29 - 06:19:04	2310
Brewster	06:12:03	-47.5	Dark	Down	67.3	177.5	Up	06:05:16 - 06:18:51	2293
Manson/Chelan	06:12:05	-47.5	Dark	Down	67.5	176.6	Up	06:05:17 - 06:18:52	2269
Wenatchee	06:12:05	-47.7	Dark	Down	68.0	176.1	Up	06:05:17 - 06:18:52	2219
Ellensburg	06:12:05	-47.9	Dark	Down	68.4	175.5	Up	06:05:18 - 06:18:53	2174
Yakima	06:12:05	-48.1	Dark	Down	68.8	175.4	Up	06:05:18 - 06:18:53	2132
Toppenish/White Swan	06:12:05	-48.3	Dark	Down	69.0	175.7	Up	06:05:17 - 06:18:52	2111
PNWRO	06:11:59	-49.4	Dark	Down	69.4	179.5	Up	06:05:11 - 06:18:46	2086
The Dalles	06:12:07	-48.4	Dark	Down	69.7	173.5	Up	06:05:20 - 06:18:55	2024
Maupin	06:12:07	-48.8	Dark	Down	70.2	173.7	Up	06:05:19 - 06:18:54	1982
Sisters	06:12:08	-49.0	Dark	Down	71.0	172.1	Up	06:05:21 - 06:18:56	1886
Bend	06:12:07	-49.3	Dark	Down	71.3	172.7	Up	06:05:20 - 06:18:55	1863
Oregon Observatory	06:12:08	-49.4	Dark	Down	71.4	172.3	Up	06:05:20 - 06:18:55	1844
Chiloquin	06:12:08	-49.9	Dark	Down	72.7	170.4	Up	06:05:21 - 06:18:56	1702
Dunrhomin	06:11:00	-60.1	Dark	Down	71.5	220.8	Up	06:04:12 - 06:17:47	1675
Klamath Falls	06:12:08	-50.2	Dark	Down	73.0	170.5	Up	06:05:21 - 06:18:56	1666
Nikitin	06:11:00	-60.2	Dark	Down	71.7	221.1	Up	06:04:12 - 06:17:47	1656
CU-SBO	06:11:00	-60.2	Dark	Down	71.7	221.1	Up	06:04:12 - 06:17:47	1647
Cedarville	06:12:01	-51.5	Dark	Down	73.9	175.2	Up	06:05:14 - 06:18:49	1606
Fall River/Burney	06:12:06	-51.1	Dark	Down	74.2	171.0	Up	06:05:19 - 06:18:54	1544
Gimple	06:12:04	-51.9	Dark	Down	75.2	172.3	Up	06:05:16 - 06:18:51	1451
Greenville	06:12:04	-51.9	Dark	Down	75.2	172.0	Up	06:05:16 - 06:18:51	1451
Quincy	06:12:04	-52.0	Dark	Down	75.4	172.0	Up	06:05:17 - 06:18:52	1429
Portola	06:12:02	-52.4	Dark	Down	75.6	173.6	Up	06:05:14 - 06:18:49	1420
Reno	06:11:59	-52.9	Dark	Down	75.9	175.8	Up	06:05:12 - 06:18:47	1397
Carson City	06:11:59	-53.1	Dark	Down	76.2	175.8	Up	06:05:11 - 06:18:46	1359
Yerington	06:11:56	-53.6	Dark	Down	76.4	178.1	Up	06:05:08 - 06:18:43	1344
Gardnerville	06:11:58	-53.3	Dark	Down	76.5	175.9	Up	06:05:11 - 06:18:46	1333
Hawthorne	06:11:53	-54.2	Dark	Down	76.9	180.1	Up	06:05:06 - 06:18:41	1300
Lee Vining	06:11:55	-54.3	Dark	Down	77.5	178.1	Up	06:05:08 - 06:18:43	1234
Bishop	06:11:52	-55.1	Dark	Down	78.1	181.1	Up	06:05:04 - 06:18:39	1177
Beatty	06:11:44	-56.4	Dark	Down	78.4	188.4	Up	06:04:57 - 06:18:32	1146
Patrick	06:11:31	-59.1	Dark	Down	79.2	203.4	Up	06:04:43 - 06:18:18	1022
Laughlin/Bullhead City	06:11:34	-58.8	Dark	Down	79.7	200.6	Up	06:04:46 - 06:18:21	986
Lake Havasu City	06:11:32	-59.4	Dark	Down	80.2	203.2	Up	06:04:44 - 06:18:19	917
George/Scottsdale	06:11:21	-61.4	Dark	Down	79.9	216.7	Up	06:04:33 - 06:18:08	869
Wildwood	06:11:51	-56.7	Dark	Down	81.3	180.3	Up	06:05:03 - 06:18:38	821
Idyllwild	06:11:42	-58.2	Dark	Down	81.5	191.8	Up	06:04:54 - 06:18:29	804
Calipatria	06:11:36	-59.3	Dark	Down	81.9	199.9	Up	06:04:49 - 06:18:24	752
Yuma	06:11:32	-60.2	Dark	Down	82.0	206.4	Up	06:04:44 - 06:18:19	717

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 450265, (2023/02/12 06:12UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  2.59 103
77Kap Gem      07:44:26.8 +24:23:52  3.6  1.06 103
76 Gem         07:44:06.9 +25:47:03  6.6  0.45 103
450265         07:45:25.0 +25:26:15 15.7       102
Positions are for J2000

Event circumstances last updated at 2023/02/10 03:58:31 UT

RECON