RECON: TNO occultation with 523764

Event between (523764) 14WC510 and star GA0920:02487077 with event index number of 2613437

Geocentric closest approach at 2025/11/08 13:22:12 UTC

J2000 position of star is 07:16:27.0 +02:19:16
Equinox of date position of star is 07:17:42.5 +02:16:36
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 33 degrees from the moon. Moon is 87% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 29.8 AU from the Sun and 29.3 AU from the Earth.
Apparent velocity is 11.5 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 192 seconds.
The 1-sigma cross-track error in the shadow position is 2145 km.
The sky-plane scale is 21278.0 km/arcsec.

The object has an absolute magnitude Hv=7.2
Diameter=212.8 km assuming a 5% albedo -- 18.6 sec chord
Diameter=86.9 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 523764, (2025/11/08 13:26UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:46:17.3 -16:45:07 -1.5 20.55  47
Alhena         06:39:12.3 +16:22:30  1.9 17.00  15
PPM 152385     07:20:43.4 +02:41:29  5.9  0.84  33
PPM 152304     07:18:14.8 +02:41:33  8.3  0.43  32
PPM 152314     07:18:30.6 +02:19:42  8.9  0.19  33
523764         07:17:47.8 +02:16:25 16.1        33
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 4.7 sigma about the mid-time.
The median site spacing is 25.8 km RECON observability=0.7 and success probability=8.5%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	13:16:19	-17.4	AT	Up	39.4	203.0	Up	13:01:19 - 13:31:19	3111
Victoria	13:16:39	-19.1	Dark	Up	42.1	199.9	Up	13:01:39 - 13:31:39	3096
Peachland	13:16:19	-16.9	AT	Up	40.1	204.1	Up	13:01:19 - 13:31:19	3017
Kelowna	13:16:18	-16.8	AT	Up	39.9	204.4	Up	13:01:18 - 13:31:18	3012
Summerland	13:16:20	-16.9	AT	Up	40.2	204.2	Up	13:01:20 - 13:31:20	3002
Penticton	13:16:19	-16.8	AT	Up	40.3	204.4	Up	13:01:19 - 13:31:19	2992
Oliver	13:16:19	-16.7	AT	Up	40.6	204.5	Up	13:01:19 - 13:31:19	2966
Anarchist Mountain Observatory	13:16:20	-16.6	AT	Up	40.7	204.8	Up	13:01:20 - 13:31:20	2945
Okanogan	13:16:23	-16.6	AT	Up	41.3	204.8	Up	13:01:23 - 13:31:23	2907
Manson/Chelan	13:16:26	-17.0	AT	Up	41.9	204.3	Up	13:01:26 - 13:31:26	2897
Brewster	13:16:24	-16.7	AT	Up	41.6	204.6	Up	13:01:24 - 13:31:24	2896
Wenatchee	13:16:28	-17.0	AT	Up	42.4	204.2	Up	13:01:28 - 13:31:28	2870
Ellensburg	13:16:31	-17.1	AT	Up	42.8	204.1	Up	13:01:31 - 13:31:31	2850
Yakima	13:16:32	-17.1	AT	Up	43.2	204.2	Up	13:01:32 - 13:31:32	2820
Toppenish/White Swan	13:16:32	-16.9	AT	Up	43.3	204.6	Up	13:01:32 - 13:31:32	2795
The Dalles	13:16:38	-17.4	AT	Up	44.3	203.8	Up	13:01:38 - 13:31:38	2775
Maupin	13:16:38	-17.3	AT	Up	44.6	204.2	Up	13:01:38 - 13:31:38	2738
Sisters	13:16:44	-17.5	AT	Up	45.6	203.9	Up	13:01:44 - 13:31:44	2696
PNWRO	13:16:26	-15.9	AT	Up	43.2	206.6	Up	13:01:26 - 13:31:26	2695
Bend	13:16:44	-17.3	AT	Up	45.7	204.3	Up	13:01:44 - 13:31:44	2665
Oregon Observatory	13:16:45	-17.3	AT	Up	45.9	204.2	Up	13:01:45 - 13:31:45	2659
Sleaford	13:15:17	-9.0	NT	Up	33.6	219.2	Up	13:00:17 - 13:30:17	2625
Chiloquin	13:16:51	-17.5	AT	Up	47.2	204.3	Up	13:01:51 - 13:31:51	2579
Klamath Falls	13:16:52	-17.4	AT	Up	47.5	204.5	Up	13:01:52 - 13:31:52	2548
Fall River/Burney	13:16:54	-16.9	AT	Up	48.5	205.6	Up	13:01:54 - 13:31:54	2436
Cedarville	13:16:46	-16.1	AT	Up	47.6	207.1	Up	13:01:46 - 13:31:46	2410
Greenville	13:16:57	-16.4	AT	Up	49.1	206.8	Up	13:01:57 - 13:31:57	2341
Gimple	13:16:56	-16.4	AT	Up	49.1	206.9	Up	13:01:56 - 13:31:56	2336
Quincy	13:16:55	-16.4	AT	Up	49.3	206.9	Up	13:01:55 - 13:31:55	2325
Portola	13:16:54	-16.0	AT	Up	49.2	207.6	Up	13:01:54 - 13:31:54	2289
Reno	13:16:53	-15.5	AT	Up	49.2	208.7	Up	13:01:53 - 13:31:53	2233
Carson City	13:16:53	-15.4	AT	Up	49.5	208.9	Up	13:01:53 - 13:31:53	2203
Gardnerville	13:16:53	-15.4	AT	Up	49.7	209.1	Up	13:01:53 - 13:31:53	2181
Yerington	13:16:50	-14.9	AT	Up	49.5	209.9	Up	13:01:50 - 13:31:50	2153
Hawthorne	13:16:50	-14.4	AT	Up	49.7	210.9	Up	13:01:50 - 13:31:50	2087
Lee Vining	13:16:53	-14.7	AT	Up	50.3	210.6	Up	13:01:53 - 13:31:53	2067
Bishop	13:16:53	-14.0	AT	Up	50.6	212.0	Up	13:01:53 - 13:31:53	1978
Beatty	13:16:46	-12.7	AT	Up	50.2	214.6	Up	13:01:46 - 13:31:46	1851
Wildwood	13:17:07	-13.5	AT	Up	53.4	214.1	Up	13:02:07 - 13:32:07	1717
Laughlin/Bullhead City	13:16:39	-10.6	NT	Up	50.6	218.8	Up	13:01:39 - 13:31:39	1584
Idyllwild	13:16:58	-12.0	NT	Up	52.8	217.0	Up	13:01:58 - 13:31:58	1580
Patrick	13:16:36	-10.1	NT	Up	50.0	219.5	Up	13:01:36 - 13:31:36	1567
Dunrhomin	13:15:35	-5.0	CT	Up	42.0	226.4	Up	13:00:35 - 13:30:35	1559
Nikitin	13:15:36	-4.9	CT	Up	42.1	226.5	Up	13:00:36 - 13:30:36	1543
CU-SBO	13:15:36	-5.0	CT	Up	42.2	226.4	Up	13:00:36 - 13:30:36	1541
Lake Havasu City	13:16:39	-10.3	NT	Up	51.0	219.7	Up	13:01:39 - 13:31:39	1512
Calipatria	13:16:52	-10.9	NT	Up	52.6	219.2	Up	13:01:52 - 13:31:52	1460
Yuma	13:16:49	-10.1	NT	Up	52.5	220.8	Up	13:01:49 - 13:31:49	1372
George/Scottsdale	13:16:30	-8.1	NT	Up	50.2	223.5	Up	13:01:30 - 13:31:30	1310

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 523764, (2025/11/08 13:26UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.0 -16:43:24 -1.5 20.55  47
Alhena         06:37:42.8 +16:23:57  1.9 17.00  15
PPM 152385     07:19:22.4 +02:44:26  5.9  0.84  33
PPM 152304     07:16:53.7 +02:44:25  8.3  0.43  32
PPM 152314     07:17:09.7 +02:22:35  8.9  0.19  33
523764         07:16:27.0 +02:19:16 16.1        32
Positions are for J2000

Event circumstances last updated at 2024/03/03 06:05:45 UT

RECON