RECON: TNO occultation with 468861

Event between (468861) 13LU28 and star GA1140:02607702 with event index number of 2655524

Geocentric closest approach at 2025/10/28 11:51:02 UTC

J2000 position of star is 06:55:32.6 +24:06:05
Equinox of date position of star is 06:57:01.4 +24:04:07
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 171 degrees from the moon. Moon is 38% illuminated.
Apparent brightness V=18.3

[RECON map]
Object is 9.2 AU from the Sun and 8.8 AU from the Earth.
Apparent velocity is 22.4 km/sec on the sky relative to the star, or, 12.7 arcsec/hr.
The 1-sigma error in the time of the event is 20 seconds.
The 1-sigma cross-track error in the shadow position is 689 km.
The sky-plane scale is 6350.5 km/arcsec.

The object has an absolute magnitude Hv=8.3
Diameter=128.2 km assuming a 5% albedo -- 5.9 sec chord
Diameter=52.4 km assuming a 30% albedo -- 2.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 468861, (2025/10/28 11:50UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:53.7 +27:57:42  1.1 11.84 177
Alhena         06:39:12.2 +16:22:30  1.9  8.76 163
37 Gem         06:56:53.8 +25:20:28  6.3  1.28 171
PPM 096747     06:57:11.5 +23:58:23  7.8  0.09 171
468861         06:57:07.0 +24:03:59 15.5       171
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 30.6 km RECON observability=1.0 and success probability=1.7%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	11:50:44	-28.3	Dark	Down	62.4	161.0	Up	11:48:32 - 11:52:56	3724
Victoria	11:50:57	-30.7	Dark	Down	63.7	153.6	Up	11:48:45 - 11:53:09	3633
Kelowna	11:50:43	-27.9	Dark	Down	63.4	162.3	Up	11:48:31 - 11:52:55	3626
Peachland	11:50:45	-28.1	Dark	Down	63.4	161.6	Up	11:48:33 - 11:52:57	3625
Summerland	11:50:44	-28.1	Dark	Down	63.6	161.7	Up	11:48:32 - 11:52:56	3609
Penticton	11:50:44	-28.0	Dark	Down	63.7	161.9	Up	11:48:32 - 11:52:56	3600
Oliver	11:50:45	-28.1	Dark	Down	64.0	161.7	Up	11:48:33 - 11:52:57	3569
Anarchist Mountain Observatory	11:50:45	-28.0	Dark	Down	64.2	162.0	Up	11:48:33 - 11:52:57	3548
Okanogan	11:50:47	-28.3	Dark	Down	64.8	161.1	Up	11:48:35 - 11:52:59	3497
Brewster	11:50:48	-28.5	Dark	Down	65.0	160.5	Up	11:48:36 - 11:53:00	3479
Manson/Chelan	11:50:49	-28.7	Dark	Down	65.1	159.6	Up	11:48:37 - 11:53:01	3472
Sleaford	11:50:00	-19.3	Dark	Down	61.8	189.2	Up	11:47:48 - 11:52:12	3465
Wenatchee	11:50:51	-29.0	Dark	Down	65.5	158.9	Up	11:48:39 - 11:53:03	3435
Ellensburg	11:50:53	-29.2	Dark	Down	65.8	158.1	Up	11:48:41 - 11:53:05	3406
Yakima	11:50:53	-29.3	Dark	Down	66.2	157.7	Up	11:48:41 - 11:53:05	3370
Toppenish/White Swan	11:50:53	-29.2	Dark	Down	66.5	157.9	Up	11:48:41 - 11:53:05	3344
The Dalles	11:50:58	-29.9	Dark	Down	67.0	155.5	Up	11:48:46 - 11:53:10	3300
PNWRO	11:50:50	-28.3	Dark	Down	67.2	160.9	Up	11:48:38 - 11:53:02	3262
Maupin	11:50:59	-29.9	Dark	Down	67.4	155.3	Up	11:48:47 - 11:53:11	3259
Sisters	11:51:02	-30.4	Dark	Down	68.0	153.3	Up	11:48:50 - 11:53:14	3196
Bend	11:51:01	-30.3	Dark	Down	68.3	153.6	Up	11:48:49 - 11:53:13	3165
Oregon Observatory	11:51:02	-30.4	Dark	Down	68.4	153.1	Up	11:48:50 - 11:53:14	3154
Chiloquin	11:51:07	-30.9	Dark	Down	69.5	150.6	Up	11:48:55 - 11:53:19	3048
Klamath Falls	11:51:07	-30.9	Dark	Down	69.8	150.3	Up	11:48:55 - 11:53:19	3013
Cedarville	11:51:04	-29.9	Dark	Down	71.0	153.4	Up	11:48:52 - 11:53:16	2891
Fall River/Burney	11:51:08	-30.9	Dark	Down	71.0	149.6	Up	11:48:56 - 11:53:20	2890
Greenville	11:51:09	-30.7	Dark	Down	71.9	149.4	Up	11:48:57 - 11:53:21	2789
Gimple	11:51:09	-30.6	Dark	Down	71.9	149.6	Up	11:48:57 - 11:53:21	2785
Quincy	11:51:10	-30.7	Dark	Down	72.1	149.1	Up	11:48:58 - 11:53:22	2769
Portola	11:51:09	-30.4	Dark	Down	72.4	150.2	Up	11:48:57 - 11:53:21	2740
Reno	11:51:07	-29.9	Dark	Down	72.8	151.6	Up	11:48:55 - 11:53:19	2691
Carson City	11:51:08	-29.9	Dark	Down	73.2	151.1	Up	11:48:56 - 11:53:20	2656
Gardnerville	11:51:08	-29.9	Dark	Down	73.4	150.8	Up	11:48:56 - 11:53:20	2631
Yerington	11:51:06	-29.5	Dark	Down	73.6	152.6	Up	11:48:54 - 11:53:18	2615
Hawthorne	11:51:05	-29.1	Dark	Down	74.2	153.5	Up	11:48:53 - 11:53:17	2551
Lee Vining	11:51:08	-29.6	Dark	Down	74.5	151.1	Up	11:48:56 - 11:53:20	2514
Bishop	11:51:07	-29.0	Dark	Down	75.3	152.3	Up	11:48:55 - 11:53:19	2430
Beatty	11:51:02	-27.8	Dark	Down	76.3	157.1	Up	11:48:50 - 11:53:14	2325
Dunrhomin	11:50:15	-18.8	Dark	Down	73.2	197.9	Up	11:48:03 - 11:52:27	2287
Nikitin	11:50:15	-18.8	Dark	Down	73.4	198.0	Up	11:48:03 - 11:52:27	2269
CU-SBO	11:50:15	-18.9	Dark	Down	73.4	197.9	Up	11:48:03 - 11:52:27	2264
Wildwood	11:51:14	-29.4	Dark	Down	78.0	144.5	Up	11:49:02 - 11:53:26	2118
Laughlin/Bullhead City	11:50:57	-26.1	Dark	Down	78.5	163.1	Up	11:48:45 - 11:53:09	2075
Patrick	11:50:54	-25.6	Dark	Down	78.4	166.5	Up	11:48:42 - 11:53:06	2075
Idyllwild	11:51:08	-27.9	Dark	Down	79.1	151.0	Up	11:48:56 - 11:53:20	2011
Lake Havasu City	11:50:58	-25.9	Dark	Down	79.2	163.3	Up	11:48:46 - 11:53:10	1999
Calipatria	11:51:05	-27.0	Dark	Down	80.1	154.9	Up	11:48:53 - 11:53:17	1906
George/Scottsdale	11:50:50	-23.9	Dark	Down	80.4	174.8	Up	11:48:38 - 11:53:02	1834
Yuma	11:51:02	-26.2	Dark	Down	80.8	158.5	Up	11:48:50 - 11:53:14	1830

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 468861, (2025/10/28 11:50UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 11.84 177
Alhena         06:37:42.8 +16:23:57  1.9  8.76 163
37 Gem         06:55:18.6 +25:22:33  6.3  1.28 171
PPM 096747     06:55:37.2 +24:00:29  7.8  0.09 171
468861         06:55:32.6 +24:06:05 15.5       171
Positions are for J2000

Event circumstances last updated at 2024/04/18 03:41:09 UT

RECON