RECON: TNO occultation with 523746

Event between (523746) 14UT114 and star GA1160:02976224 with event index number of 2323239

Geocentric closest approach at 2025/10/18 13:06:32 UTC

J2000 position of star is 08:02:33.4 +27:21:52
Equinox of date position of star is 08:04:02.7 +27:17:42
Stellar brightness G=14.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 56 degrees from the moon. Moon is 8% illuminated.
Apparent brightness V=21.4

[RECON map]
Object is 16.8 AU from the Sun and 16.8 AU from the Earth.
Apparent velocity is 8.9 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 137 seconds.
The 1-sigma cross-track error in the shadow position is 794 km.
The sky-plane scale is 12197.4 km/arcsec.

The object has an absolute magnitude Hv=8.8
Diameter=95.5 km assuming a 5% albedo -- 11.8 sec chord
Diameter=39.0 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523746, (2025/10/18 13:05UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:53.5 +27:57:42  1.1  3.88  59
PPM 098327     08:07:11.6 +27:27:18  6.1  0.70  55
PPM 098270     08:04:46.5 +27:51:29  8.4  0.58  56
PPM 098308     08:06:18.7 +27:31:32  9.5  0.54  55
PPM 098265     08:04:38.0 +27:22:34 10.7  0.14  55
523746         08:04:08.0 +27:17:27 14.5        55
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 88.0 km RECON observability=0.2 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)
Sleaford	13:05:53	-5.1	CT	Up	65.2	174.0	Up	12:54:00 - 13:17:47	3463
Kamloops	13:03:59	-14.3	AT	Up	63.1	143.3	Up	12:52:06 - 13:15:53	3361
Kelowna	13:04:04	-13.8	AT	Up	64.1	144.0	Up	12:52:10 - 13:15:57	3272
Peachland	13:04:01	-14.0	AT	Up	64.1	143.3	Up	12:52:07 - 13:15:54	3263
Summerland	13:04:02	-13.9	AT	Up	64.2	143.3	Up	12:52:08 - 13:15:55	3247
Penticton	13:04:02	-13.8	AT	Up	64.3	143.4	Up	12:52:08 - 13:15:55	3239
Oliver	13:04:01	-13.8	AT	Up	64.6	143.0	Up	12:52:07 - 13:15:54	3203
Anarchist Mountain Observatory	13:04:02	-13.7	AT	Up	64.8	143.1	Up	12:52:08 - 13:15:55	3184
Victoria	13:03:29	-16.5	AT	Up	63.4	135.0	Up	12:51:35 - 13:15:22	3167
Okanogan	13:04:00	-13.9	AT	Up	65.2	141.8	Up	12:52:06 - 13:15:53	3120
Brewster	13:03:57	-14.0	AT	Up	65.3	141.1	Up	12:52:04 - 13:15:51	3093
Manson/Chelan	13:03:53	-14.3	AT	Up	65.3	140.1	Up	12:52:00 - 13:15:47	3074
Wenatchee	13:03:51	-14.4	AT	Up	65.6	139.1	Up	12:51:57 - 13:15:44	3026
Ellensburg	13:03:48	-14.6	AT	Up	65.8	138.0	Up	12:51:55 - 13:15:42	2985
Yakima	13:03:46	-14.6	AT	Up	66.1	137.4	Up	12:51:53 - 13:15:40	2943
Toppenish/White Swan	13:03:48	-14.5	AT	Up	66.4	137.4	Up	12:51:54 - 13:15:41	2919
PNWRO	13:04:00	-13.4	AT	Up	67.4	139.8	Up	12:52:07 - 13:15:54	2870
The Dalles	13:03:39	-15.1	AT	Up	66.5	134.6	Up	12:51:46 - 13:15:33	2845
Maupin	13:03:39	-15.0	AT	Up	66.9	134.1	Up	12:51:46 - 13:15:33	2800
Sisters	13:03:33	-15.4	AT	Up	67.2	131.6	Up	12:51:39 - 13:15:26	2712
Bend	13:03:34	-15.2	AT	Up	67.5	131.6	Up	12:51:41 - 13:15:28	2685
Oregon Observatory	13:03:33	-15.3	AT	Up	67.5	131.1	Up	12:51:39 - 13:15:26	2667
Chiloquin	13:03:26	-15.6	AT	Up	68.1	127.8	Up	12:51:33 - 13:15:20	2532
Klamath Falls	13:03:26	-15.6	AT	Up	68.4	127.2	Up	12:51:33 - 13:15:20	2495
Cedarville	13:03:39	-14.4	AT	Up	69.8	128.9	Up	12:51:46 - 13:15:33	2406
Fall River/Burney	13:03:27	-15.3	AT	Up	69.3	125.5	Up	12:51:33 - 13:15:20	2365
Greenville	13:03:29	-15.0	AT	Up	70.1	124.3	Up	12:51:36 - 13:15:23	2264
Gimple	13:03:30	-14.9	AT	Up	70.2	124.5	Up	12:51:36 - 13:15:23	2263
Quincy	13:03:28	-15.0	AT	Up	70.2	123.8	Up	12:51:35 - 13:15:22	2242
Portola	13:03:33	-14.6	AT	Up	70.6	124.5	Up	12:51:39 - 13:15:26	2224
Dunrhomin	13:06:01	-2.5	CT	Up	77.0	172.0	Up	12:54:08 - 13:17:55	2222
Nikitin	13:06:01	-2.5	CT	Up	77.2	171.8	Up	12:54:07 - 13:17:54	2202
CU-SBO	13:06:00	-2.5	CT	Up	77.2	171.4	Up	12:54:07 - 13:17:54	2195
Reno	13:03:38	-14.1	AT	Up	71.2	125.1	Up	12:51:45 - 13:15:32	2190
Carson City	13:03:38	-14.0	AT	Up	71.4	124.3	Up	12:51:44 - 13:15:31	2151
Yerington	13:03:44	-13.5	AT	Up	71.9	125.1	Up	12:51:50 - 13:15:37	2125
Gardnerville	13:03:38	-14.0	AT	Up	71.6	123.8	Up	12:51:44 - 13:15:31	2124
Hawthorne	13:03:48	-13.1	AT	Up	72.6	125.0	Up	12:51:54 - 13:15:41	2070
Lee Vining	13:03:42	-13.5	AT	Up	72.5	122.5	Up	12:51:49 - 13:15:36	2013
Bishop	13:03:48	-12.8	AT	Up	73.4	122.3	Up	12:51:54 - 13:15:41	1942
Beatty	13:04:04	-11.5	NT	Up	74.7	124.6	Up	12:52:10 - 13:15:57	1880
Patrick	13:04:32	-8.9	NT	Up	77.6	127.3	Up	12:52:38 - 13:16:25	1702
Laughlin/Bullhead City	13:04:24	-9.5	NT	Up	77.2	124.4	Up	12:52:30 - 13:16:17	1678
Lake Havasu City	13:04:26	-9.2	NT	Up	77.8	122.6	Up	12:52:33 - 13:16:20	1603
Wildwood	13:03:41	-12.9	AT	Up	74.7	111.7	Up	12:51:47 - 13:15:34	1587
Idyllwild	13:04:00	-11.2	NT	Up	76.3	114.0	Up	12:52:07 - 13:15:54	1533
George/Scottsdale	13:04:51	-7.0	NT	Up	80.0	127.0	Up	12:52:58 - 13:16:45	1508
Calipatria	13:04:11	-10.1	NT	Up	77.5	114.1	Up	12:52:18 - 13:16:05	1459
Yuma	13:04:21	-9.3	NT	Up	78.4	114.3	Up	12:52:27 - 13:16:14	1406

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 523746, (2025/10/18 13:05UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.8 +28:01:33  1.1  3.88  59
PPM 098327     08:05:37.0 +27:31:49  6.1  0.70  55
PPM 098270     08:03:11.6 +27:55:55  8.4  0.58  56
PPM 098308     08:04:44.0 +27:36:02  9.5  0.54  55
PPM 098265     08:03:03.4 +27:27:00 10.7  0.14  55
523746         08:02:33.4 +27:21:52 14.5        56
Positions are for J2000

Event circumstances last updated at 2024/05/05 03:32:43 UT

RECON