RECON: TNO occultation with 447178

Event between (447178) 05RO43 and star GA0740:03108035 with event index number of 2290818

Geocentric closest approach at 2026/04/02 02:44:40 UTC

J2000 position of star is 07:43:36.3 -14:18:37
Equinox of date position of star is 07:44:43.6 -14:22:11
Stellar brightness G=13.9, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 73 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=19.3

[RECON map]
Object is 15.2 AU from the Sun and 14.9 AU from the Earth.
Apparent velocity is 17.2 km/sec on the sky relative to the star, or, 5.7 arcsec/hr.
The 1-sigma error in the time of the event is 34 seconds.
The 1-sigma cross-track error in the shadow position is 1176 km.
The sky-plane scale is 10827.8 km/arcsec.

The object has an absolute magnitude Hv=7.2
Diameter=208.9 km assuming a 5% albedo -- 12.9 sec chord
Diameter=85.3 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 447178, (2026/04/02 02:45UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:46:18.4 -16:45:10 -1.5 14.29  87
15Rho Pup      08:08:39.8 -24:22:53  2.8 11.47  67
4 Pup          07:47:09.4 -14:37:45  5.0  0.62  73
PPM 219070     07:43:37.9 -13:54:44  8.5  0.54  74
PPM 219104     07:44:58.7 -14:15:45  9.0  0.12  73
447178         07:44:49.0 -14:22:28 13.9        73
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 0.0 km RECON observability=0.1 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)
Victoria	02:50:03	-1.7	CT	Up	26.9	173.1	Low	02:46:44 - 02:53:21	2743
Chiloquin	02:49:45	-3.8	CT	Up	32.9	174.4	Up	02:46:27 - 02:53:04	2634
Klamath Falls	02:49:44	-3.9	CT	Up	33.3	174.5	Up	02:46:25 - 02:53:02	2627
Sisters	02:49:51	-3.7	CT	Up	31.2	174.8	Up	02:46:33 - 02:53:10	2611
Oregon Observatory	02:49:49	-3.8	CT	Up	31.7	175.0	Up	02:46:31 - 02:53:08	2601
Fall River/Burney	02:49:40	-4.4	CT	Up	34.5	174.8	Up	02:46:22 - 02:52:59	2595
Bend	02:49:50	-3.9	CT	Up	31.5	175.1	Up	02:46:32 - 02:53:09	2590
The Dalles	02:49:55	-3.7	CT	Up	30.0	175.4	Low	02:46:36 - 02:53:13	2581
Maupin	02:49:54	-3.9	CT	Up	30.4	175.5	Up	02:46:36 - 02:53:13	2573
Greenville	02:49:37	-4.8	CT	Up	35.4	175.3	Up	02:46:18 - 02:52:55	2556
Quincy	02:49:36	-4.9	CT	Up	35.6	175.3	Up	02:46:18 - 02:52:55	2555
Gimple	02:49:37	-4.9	CT	Up	35.4	175.4	Up	02:46:18 - 02:52:55	2549
Yakima	02:49:59	-4.0	CT	Up	29.0	176.1	Low	02:46:40 - 02:53:17	2534
Ellensburg	02:50:00	-3.9	CT	Up	28.6	176.2	Low	02:46:41 - 02:53:18	2533
Kamloops	02:50:11	-3.3	CT	Up	25.0	176.5	Low	02:46:52 - 02:53:29	2521
Toppenish/White Swan	02:49:58	-4.1	CT	Up	29.2	176.3	Low	02:46:40 - 02:53:17	2520
Wenatchee	02:50:02	-4.0	CT	Up	28.2	176.4	Low	02:46:44 - 02:53:21	2516
Portola	02:49:37	-5.3	CT	Up	35.8	175.8	Up	02:46:18 - 02:52:55	2515
Manson/Chelan	02:50:03	-4.0	CT	Up	27.7	176.6	Low	02:46:44 - 02:53:21	2504
Cedarville	02:49:42	-5.2	CT	Up	34.1	176.3	Up	02:46:24 - 02:53:01	2494
Peachland	02:50:09	-3.9	CT	Up	25.9	177.1	Low	02:46:50 - 02:53:27	2478
Brewster	02:50:04	-4.2	CT	Up	27.5	177.0	Low	02:46:45 - 02:53:22	2477
Summerland	02:50:08	-3.9	CT	Up	26.0	177.2	Low	02:46:50 - 02:53:27	2471
Okanogan	02:50:05	-4.3	CT	Up	27.3	177.3	Low	02:46:46 - 02:53:23	2463
Penticton	02:50:08	-4.0	CT	Up	26.1	177.4	Low	02:46:50 - 02:53:27	2463
Oliver	02:50:07	-4.1	CT	Up	26.5	177.3	Low	02:46:49 - 02:53:26	2462
Reno	02:49:35	-5.8	CT	Up	36.1	176.6	Up	02:46:17 - 02:52:54	2459
Kelowna	02:50:09	-4.0	CT	Up	25.8	177.5	Low	02:46:50 - 02:53:27	2457
Carson City	02:49:34	-5.9	CT	Up	36.4	176.6	Up	02:46:16 - 02:52:53	2456
Gardnerville	02:49:33	-6.0	CT	Up	36.7	176.6	Up	02:46:15 - 02:52:52	2451
Anarchist Mountain Observatory	02:50:07	-4.3	CT	Up	26.6	177.5	Low	02:46:48 - 02:53:25	2448
PNWRO	02:49:59	-5.2	CT	Up	29.7	178.0	Low	02:46:40 - 02:53:17	2405
Yerington	02:49:34	-6.4	NT	Up	36.7	177.3	Up	02:46:16 - 02:52:53	2400
Lee Vining	02:49:30	-6.6	NT	Up	37.7	177.3	Up	02:46:11 - 02:52:48	2392
Hawthorne	02:49:32	-6.9	NT	Up	37.1	178.0	Up	02:46:13 - 02:52:50	2352
Bishop	02:49:27	-7.3	NT	Up	38.3	178.2	Up	02:46:09 - 02:52:46	2326
Wildwood	02:49:14	-7.8	NT	Up	41.6	177.8	Up	02:45:56 - 02:52:33	2325
Beatty	02:49:26	-8.7	NT	Up	38.8	180.2	Up	02:46:08 - 02:52:45	2178
Idyllwild	02:49:13	-9.4	NT	Up	42.0	180.2	Up	02:45:55 - 02:52:32	2149
Calipatria	02:49:12	-10.5	NT	Up	42.5	181.8	Up	02:45:53 - 02:52:30	2034
Laughlin/Bullhead City	02:49:20	-10.8	NT	Up	40.5	183.0	Up	02:46:02 - 02:52:39	1967
Yuma	02:49:10	-11.3	NT	Up	42.9	183.0	Up	02:45:51 - 02:52:28	1947
Lake Havasu City	02:49:18	-11.1	NT	Up	41.1	183.3	Up	02:46:00 - 02:52:37	1937
Patrick	02:49:23	-11.3	NT	Up	40.2	183.9	Up	02:46:04 - 02:52:41	1905
George/Scottsdale	02:49:17	-13.3	AT	Up	41.7	186.5	Up	02:45:58 - 02:52:35	1701
Sleaford	02:50:20	-11.5	NT	Up	22.9	191.8	Low	02:47:02 - 02:53:39	1540
CU-SBO	02:49:43	-16.4	AT	Up	34.6	193.9	Up	02:46:25 - 02:53:02	1229
Dunrhomin	02:49:44	-16.4	AT	Up	34.3	193.9	Up	02:46:26 - 02:53:03	1226
Nikitin	02:49:44	-16.5	AT	Up	34.5	193.9	Up	02:46:26 - 02:53:03	1224

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 447178, (2026/04/02 02:45UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.0 -16:43:26 -1.5 14.29  87
15Rho Pup      08:07:32.5 -24:18:14  2.8 11.47  67
4 Pup          07:45:56.8 -14:33:50  5.0  0.62  73
PPM 219070     07:42:25.0 -13:50:55  8.5  0.54  74
PPM 219104     07:43:46.0 -14:11:54  9.0  0.12  73
447178         07:43:36.3 -14:18:37 13.9        73
Positions are for J2000

Event circumstances last updated at 2024/04/18 03:43:23 UT

RECON