RECON: TNO occultation with 468861

Event between (468861) 13LU28 and star GA1220:02766284 with event index number of 2655392

Geocentric closest approach at 2025/04/01 05:19:49 UTC

J2000 position of star is 06:30:44.0 +33:00:21
Equinox of date position of star is 06:32:19.6 +32:59:14
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 46 degrees from the moon. Moon is 11% illuminated.
Apparent brightness V=18.3

[RECON map]
Object is 8.9 AU from the Sun and 8.9 AU from the Earth.
Apparent velocity is 17.3 km/sec on the sky relative to the star, or, 9.6 arcsec/hr.
The 1-sigma error in the time of the event is 31 seconds.
The 1-sigma cross-track error in the shadow position is 399 km.
The sky-plane scale is 6468.4 km/arcsec.

The object has an absolute magnitude Hv=8.3
Diameter=128.2 km assuming a 5% albedo -- 7.6 sec chord
Diameter=52.4 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 468861, (2025/04/01 05:19UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:51.6 +27:57:47  1.1 16.79  62
34Bet Aur      06:01:22.9 +44:56:50  1.9 13.38  42
PPM 071742     06:34:06.0 +32:26:05  6.0  0.66  46
PPM 071716     06:32:59.0 +33:05:59  9.7  0.17  46
468861         06:32:23.4 +32:59:12 16.0        46
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 31.5 km RECON observability=1.0 and success probability=0.8%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	05:16:15	-23.9	Dark	Up	49.2	264.3	Up	05:13:11 - 05:19:19	-796
Victoria	05:16:31	-23.8	Dark	Up	51.3	264.4	Up	05:13:27 - 05:19:35	-899
Kelowna	05:16:15	-24.9	Dark	Up	48.7	266.0	Up	05:13:11 - 05:19:19	-900
Peachland	05:16:17	-24.8	Dark	Up	48.9	265.9	Up	05:13:13 - 05:19:21	-902
Summerland	05:16:17	-24.9	Dark	Up	48.8	266.2	Up	05:13:13 - 05:19:21	-919
Penticton	05:16:17	-25.0	Dark	Up	48.8	266.3	Up	05:13:13 - 05:19:21	-929
Oliver	05:16:18	-25.3	Dark	Up	48.8	266.7	Up	05:13:14 - 05:19:22	-962
Sleaford	05:15:35	-28.5	Dark	Up	40.3	274.2	Up	05:12:31 - 05:18:39	-977
Anarchist Mountain Observatory	05:16:18	-25.5	Dark	Up	48.7	267.1	Up	05:13:14 - 05:19:22	-985
Okanogan	05:16:21	-25.8	Dark	Up	48.8	267.6	Up	05:13:17 - 05:19:25	-1039
Brewster	05:16:22	-25.9	Dark	Up	49.0	267.8	Up	05:13:18 - 05:19:26	-1058
Manson/Chelan	05:16:24	-25.9	Dark	Up	49.2	267.8	Up	05:13:20 - 05:19:28	-1066
Wenatchee	05:16:26	-26.1	Dark	Up	49.4	268.2	Up	05:13:22 - 05:19:30	-1105
Ellensburg	05:16:28	-26.3	Dark	Up	49.5	268.5	Up	05:13:24 - 05:19:32	-1136
Yakima	05:16:29	-26.6	Dark	Up	49.5	269.0	Up	05:13:25 - 05:19:33	-1174
Toppenish/White Swan	05:16:30	-26.8	Dark	Up	49.4	269.4	Up	05:13:26 - 05:19:34	-1199
The Dalles	05:16:35	-26.9	Dark	Up	50.0	269.7	Up	05:13:31 - 05:19:39	-1244
PNWRO	05:16:27	-27.8	Dark	Up	48.4	270.9	Up	05:13:23 - 05:19:31	-1282
Maupin	05:16:35	-27.2	Dark	Up	49.9	270.3	Up	05:13:31 - 05:19:39	-1286
Sisters	05:16:40	-27.5	Dark	Up	50.2	271.0	Up	05:13:36 - 05:19:44	-1350
Bend	05:16:41	-27.8	Dark	Up	50.0	271.5	Up	05:13:37 - 05:19:45	-1381
Oregon Observatory	05:16:42	-27.9	Dark	Up	50.1	271.6	Up	05:13:38 - 05:19:46	-1392
Chiloquin	05:16:48	-28.5	Dark	Up	50.3	272.9	Up	05:13:44 - 05:19:52	-1495
Klamath Falls	05:16:49	-28.7	Dark	Up	50.3	273.4	Up	05:13:45 - 05:19:53	-1528
Fall River/Burney	05:16:52	-29.7	Dark	Up	49.9	275.0	Up	05:13:48 - 05:19:56	-1647
Cedarville	05:16:46	-30.1	Dark	Up	49.0	275.2	Up	05:13:42 - 05:19:50	-1648
Greenville	05:16:54	-30.5	Dark	Up	49.4	276.4	Up	05:13:50 - 05:19:58	-1743
Gimple	05:16:54	-30.6	Dark	Up	49.4	276.4	Up	05:13:50 - 05:19:58	-1747
Quincy	05:16:55	-30.7	Dark	Up	49.4	276.6	Up	05:13:51 - 05:19:59	-1761
Portola	05:16:54	-31.0	Dark	Up	49.0	277.0	Up	05:13:50 - 05:19:58	-1790
Reno	05:16:53	-31.6	Dark	Up	48.5	277.6	Up	05:13:49 - 05:19:57	-1837
Carson City	05:16:54	-31.8	Dark	Up	48.4	278.0	Up	05:13:50 - 05:19:58	-1869
Gardnerville	05:16:56	-32.0	Dark	Up	48.4	278.3	Up	05:13:52 - 05:20:00	-1892
Yerington	05:16:53	-32.3	Dark	Up	47.9	278.6	Up	05:13:49 - 05:19:57	-1909
Hawthorne	05:16:53	-32.9	Dark	Up	47.4	279.3	Up	05:13:49 - 05:19:57	-1968
Lee Vining	05:16:57	-33.0	Dark	Up	47.7	279.7	Up	05:13:53 - 05:20:01	-2000
Bishop	05:16:57	-33.8	Dark	Up	47.0	280.7	Up	05:13:53 - 05:20:01	-2077
Dunrhomin	05:16:06	-38.7	Dark	Down	37.8	284.3	Up	05:13:02 - 05:19:10	-2156
Beatty	05:16:53	-35.1	Dark	Up	45.7	281.9	Up	05:13:49 - 05:19:57	-2173
Nikitin	05:16:07	-38.8	Dark	Down	37.7	284.4	Up	05:13:03 - 05:19:11	-2173
CU-SBO	05:16:07	-38.8	Dark	Down	37.8	284.4	Up	05:13:03 - 05:19:11	-2178
Wildwood	05:17:11	-35.8	Dark	Up	46.5	284.0	Up	05:14:07 - 05:20:15	-2347
Laughlin/Bullhead City	05:16:54	-37.6	Dark	Down	43.6	284.4	Up	05:13:50 - 05:19:58	-2391
Patrick	05:16:50	-37.8	Dark	Down	43.1	284.5	Up	05:13:46 - 05:19:54	-2392
Idyllwild	05:17:06	-37.2	Dark	Up	44.9	285.0	Up	05:14:02 - 05:20:10	-2444
Lake Havasu City	05:16:55	-38.2	Dark	Down	43.2	285.2	Up	05:13:51 - 05:19:59	-2457
Calipatria	05:17:04	-38.4	Dark	Down	43.8	286.0	Up	05:14:00 - 05:20:08	-2534
George/Scottsdale	05:16:50	-40.2	Dark	Down	41.0	286.7	Up	05:13:46 - 05:19:54	-2595
Yuma	05:17:03	-39.2	Dark	Down	42.9	286.7	Up	05:13:59 - 05:20:07	-2598

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, (2025/04/01 05:19UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 16.79  62
34Bet Aur      05:59:31.6 +44:56:51  1.9 13.38  42
PPM 071742     06:32:27.1 +32:27:18  6.0  0.66  46
PPM 071716     06:31:19.6 +33:07:09  9.7  0.17  46
468861         06:30:44.0 +33:00:21 16.0        46
Positions are for J2000

Event circumstances last updated at 2024/04/20 03:57:37 UT

RECON