RECON: TNO occultation with 127871

Event between (127871) 03FC128 and star GA0800:04401701 with event index number of 1470902

Geocentric closest approach at 2026/04/05 09:08:01 UTC

J2000 position of star is 13:38:59.1 -08:11:55
Equinox of date position of star is 13:40:12.5 -08:18:57
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 28 degrees from the moon. Moon is 90% illuminated.
Apparent brightness V=22.8

[RECON map]
Object is 34.6 AU from the Sun and 33.6 AU from the Earth.
Apparent velocity is 24.1 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 118 seconds.
The 1-sigma cross-track error in the shadow position is 2118 km.
The sky-plane scale is 24399.3 km/arcsec.

The object has an absolute magnitude Hv=7.4
Diameter=198.6 km assuming a 5% albedo -- 8.2 sec chord
Diameter=81.1 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is 5:4E
 
 
 
 
 
 

Star training set for 127871, (2026/04/05 09:09UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:34.8 -11:17:51  1.0  4.51  29
82 Vir         13:42:59.7 -08:50:05  5.0  0.82  27
PPM 196700     13:38:58.0 -08:00:17  7.3  0.48  28
PPM 196747     13:41:40.0 -08:09:07  9.1  0.37  28
127871         13:40:22.0 -08:19:52 15.0        27
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 12.9 km RECON observability=1.0 and success probability=17.4%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	09:08:32	-26.2	Dark	Up	27.3	202.6	Low	08:58:14 - 09:18:51	-215
Kamloops	09:09:08	-31.5	Dark	Up	30.9	186.8	Up	08:58:49 - 09:19:26	-603
Kelowna	09:09:05	-32.1	Dark	Up	31.6	187.8	Up	08:58:46 - 09:19:23	-622
Peachland	09:09:05	-32.2	Dark	Up	31.8	187.5	Up	08:58:47 - 09:19:24	-635
Summerland	09:09:05	-32.3	Dark	Up	31.9	187.6	Up	08:58:46 - 09:19:23	-640
Penticton	09:09:04	-32.4	Dark	Up	32.0	187.8	Up	08:58:46 - 09:19:23	-641
Oliver	09:09:04	-32.7	Dark	Up	32.3	187.8	Up	08:58:45 - 09:19:22	-660
Anarchist Mountain Observatory	09:09:03	-32.8	Dark	Up	32.5	188.0	Up	08:58:45 - 09:19:22	-663
Okanogan	09:09:03	-33.5	Dark	Up	33.1	187.8	Up	08:58:45 - 09:19:22	-704
Brewster	09:09:03	-33.8	Dark	Up	33.4	187.6	Up	08:58:45 - 09:19:22	-723
Manson/Chelan	09:09:04	-34.1	Dark	Up	33.7	187.2	Up	08:58:46 - 09:19:23	-744
Wenatchee	09:09:04	-34.6	Dark	Up	34.1	187.0	Up	08:58:46 - 09:19:23	-775
Victoria	09:09:14	-34.1	Dark	Up	33.2	183.4	Up	08:58:55 - 09:19:32	-794
Dunrhomin	09:08:06	-35.5	Dark	Up	37.9	206.4	Up	08:57:48 - 09:18:25	-799
Ellensburg	09:09:04	-35.0	Dark	Up	34.6	186.8	Up	08:58:46 - 09:19:23	-804
Nikitin	09:08:06	-35.6	Dark	Up	38.1	206.5	Up	08:57:47 - 09:18:24	-811
PNWRO	09:08:58	-35.5	Dark	Up	35.4	188.9	Up	08:58:40 - 09:19:17	-816
CU-SBO	09:08:06	-35.7	Dark	Up	38.1	206.4	Up	08:57:47 - 09:18:24	-817
Yakima	09:09:04	-35.4	Dark	Up	35.0	186.8	Up	08:58:46 - 09:19:23	-828
Toppenish/White Swan	09:09:03	-35.5	Dark	Up	35.2	187.0	Up	08:58:44 - 09:19:21	-835
The Dalles	09:09:04	-36.5	Dark	Up	36.0	186.1	Up	08:58:46 - 09:19:23	-902
Maupin	09:09:04	-36.8	Dark	Up	36.4	186.3	Up	08:58:45 - 09:19:22	-923
Sisters	09:09:04	-37.8	Dark	Up	37.3	185.8	Up	08:58:45 - 09:19:22	-990
Bend	09:09:03	-37.9	Dark	Up	37.6	186.1	Up	08:58:44 - 09:19:21	-997
Oregon Observatory	09:09:03	-38.1	Dark	Up	37.7	186.0	Up	08:58:44 - 09:19:21	-1011
Chiloquin	09:09:03	-39.5	Dark	Up	39.1	185.5	Up	08:58:44 - 09:19:21	-1105
Cedarville	09:08:56	-40.0	Dark	Up	40.0	187.8	Up	08:58:38 - 09:19:15	-1123
Klamath Falls	09:09:02	-39.8	Dark	Up	39.4	185.7	Up	08:58:43 - 09:19:20	-1124
Fall River/Burney	09:09:00	-40.8	Dark	Up	40.6	186.2	Up	08:58:41 - 09:19:18	-1190
Gimple	09:08:56	-41.5	Dark	Up	41.4	187.0	Up	08:58:38 - 09:19:15	-1234
Greenville	09:08:57	-41.5	Dark	Up	41.4	186.9	Up	08:58:38 - 09:19:15	-1237
Reno	09:08:52	-41.8	Dark	Up	41.9	188.4	Up	08:58:34 - 09:19:11	-1243
Portola	09:08:55	-41.7	Dark	Up	41.7	187.6	Up	08:58:36 - 09:19:13	-1244
Quincy	09:08:56	-41.7	Dark	Up	41.6	186.9	Up	08:58:38 - 09:19:15	-1250
Yerington	09:08:49	-42.1	Dark	Up	42.4	189.4	Up	08:58:31 - 09:19:08	-1261
Carson City	09:08:51	-42.1	Dark	Up	42.2	188.5	Up	08:58:33 - 09:19:10	-1266
Hawthorne	09:08:47	-42.3	Dark	Up	42.8	190.1	Up	08:58:28 - 09:19:05	-1276
Gardnerville	09:08:52	-42.3	Dark	Up	42.5	188.6	Up	08:58:33 - 09:19:10	-1281
Lee Vining	09:08:48	-43.0	Dark	Up	43.4	189.6	Up	08:58:29 - 09:19:06	-1329
Beatty	09:08:38	-43.2	Dark	Up	44.1	192.9	Up	08:58:20 - 09:18:57	-1333
Bishop	09:08:44	-43.3	Dark	Up	43.9	190.6	Up	08:58:26 - 09:19:03	-1349
Patrick	09:08:26	-43.3	Dark	Up	44.9	197.2	Up	08:58:07 - 09:18:44	-1351
Laughlin/Bullhead City	09:08:28	-43.8	Dark	Up	45.3	196.3	Up	08:58:09 - 09:18:46	-1390
George/Scottsdale	09:08:16	-43.9	Dark	Up	46.0	200.4	Up	08:57:57 - 09:18:34	-1413
Lake Havasu City	09:08:26	-44.3	Dark	Up	45.9	196.8	Up	08:58:08 - 09:18:45	-1430
Idyllwild	09:08:33	-46.0	Dark	Up	47.1	193.7	Up	08:58:14 - 09:18:51	-1557
Calipatria	09:08:28	-46.0	Dark	Up	47.5	195.5	Up	08:58:09 - 09:18:46	-1567
Yuma	09:08:24	-46.0	Dark	Up	47.7	196.9	Up	08:58:05 - 09:18:42	-1571
Wildwood	09:08:40	-46.4	Dark	Up	47.1	191.0	Up	08:58:22 - 09:18:59	-1590

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 127871, (2026/04/05 09:09UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  4.51  29
82 Vir         13:41:36.6 -08:42:10  5.0  0.82  27
PPM 196700     13:37:35.2 -07:52:18  7.3  0.48  28
PPM 196747     13:40:17.2 -08:01:10  9.1  0.37  28
127871         13:38:59.1 -08:11:55 15.0        28
Positions are for J2000

Event circumstances last updated at 2023/03/27 03:36:30 UT

RECON