RECON: TNO occultation with 603108

Event between (603108) 14WB509 and star GA1160:00483501 with event index number of 2721833

Geocentric closest approach at 2026/02/08 03:01:01 UTC

J2000 position of star is 03:19:45.7 +27:15:29
Equinox of date position of star is 03:21:08.0 +27:20:22
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 159 degrees from the moon. Moon is 63% illuminated.
TNO apparent brightness V=22.3

[RECON map]
TNO is 35.0 AU from the Sun and 34.9 AU from the Earth.
The TNO is moving 4.6 km/sec on the sky relative to the star, or, 0.7 arcsec/hr.
The 1-sigma error in the time of the event is 379 seconds.
The 1-sigma cross-track error in the shadow position is 2221 km.
The sky-plane scale is 25302.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.7
Diameter=274.2 km assuming a 5% albedo -- 60.5 sec chord
Diameter=111.9 km assuming a 30% albedo -- 24.7 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 603108, (2026/02/08 03:00UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:25.3 +16:33:35  0.8 20.64 143
44Zet Per      03:55:46.8 +31:57:32  2.8  8.78 150
56 Ari         03:13:47.9 +27:21:13  5.6  1.67 160
59 Ari         03:21:29.8 +27:09:50  6.7  0.19 159
603108         03:21:19.8 +27:21:04 16.3       159
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 2.4 sigma about the mid-time.
The median site spacing is 12.7 km RECON observability=1.0 and success probability=7.6%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	02:56:52	-26.9	Dark	Down	58.2	229.0	Up	02:41:52 - 03:11:52	5378
Dunrhomin	03:01:13	-29.8	Dark	Down	63.2	249.8	Up	02:46:13 - 03:16:13	4987
CU-SBO	03:01:16	-29.8	Dark	Down	63.3	250.2	Up	02:46:16 - 03:16:16	4970
Kelowna	02:55:51	-18.5	Dark	Down	65.4	208.2	Up	02:40:51 - 03:10:51	4507
Kamloops	02:55:27	-17.8	AT	Down	64.9	205.4	Up	02:40:27 - 03:10:27	4498
Penticton	02:55:58	-18.4	Dark	Down	65.7	208.4	Up	02:40:58 - 03:10:58	4485
Peachland	02:55:50	-18.3	Dark	Down	65.6	207.7	Up	02:40:50 - 03:10:50	4484
Summerland	02:55:56	-18.3	Dark	Down	65.6	208.1	Up	02:40:56 - 03:10:56	4482
Anarchist Mountain Observatory	02:56:07	-18.5	Dark	Down	66.1	209.4	Up	02:41:07 - 03:11:07	4469
Oliver	02:56:02	-18.4	Dark	Down	66.0	208.8	Up	02:41:02 - 03:11:02	4466
Okanogan	02:56:19	-18.4	Dark	Down	66.7	209.8	Up	02:41:19 - 03:11:19	4422
Brewster	02:56:22	-18.3	Dark	Down	67.0	209.7	Up	02:41:22 - 03:11:22	4395
Manson/Chelan	02:56:23	-18.0	Dark	Down	67.3	209.2	Up	02:41:23 - 03:11:23	4362
PNWRO	02:57:10	-18.9	Dark	Down	68.3	214.8	Up	02:42:10 - 03:12:10	4339
Wenatchee	02:56:29	-17.9	AT	Down	67.7	209.4	Up	02:41:29 - 03:11:29	4326
Ellensburg	02:56:37	-17.7	AT	Down	68.2	209.5	Up	02:41:37 - 03:11:37	4290
Yakima	02:56:42	-17.7	AT	Down	68.5	210.0	Up	02:41:42 - 03:11:42	4266
Toppenish/White Swan	02:56:51	-17.9	AT	Down	68.6	210.8	Up	02:41:51 - 03:11:51	4265
George/Scottsdale	03:01:16	-24.7	Dark	Down	70.2	256.8	Up	02:46:16 - 03:16:16	4210
Victoria	02:55:39	-15.8	AT	Down	67.7	201.0	Up	02:40:39 - 03:10:39	4202
The Dalles	02:56:58	-17.3	AT	Down	69.6	210.1	Up	02:41:58 - 03:11:58	4172
Maupin	02:57:06	-17.3	AT	Down	69.9	211.0	Up	02:42:06 - 03:12:06	4156
Patrick	03:01:16	-23.1	Dark	Down	71.3	249.6	Up	02:46:16 - 03:16:16	4132
Bend	02:57:26	-17.2	AT	Down	70.9	212.3	Up	02:42:26 - 03:12:26	4078
Sisters	02:57:20	-17.0	AT	Down	70.8	211.2	Up	02:42:20 - 03:12:20	4074
Laughlin/Bullhead City	03:01:16	-22.5	Dark	Down	71.9	249.3	Up	02:46:16 - 03:16:16	4065
Oregon Observatory	02:57:30	-17.1	AT	Down	71.1	212.2	Up	02:42:30 - 03:12:30	4059
Lake Havasu City	03:01:16	-22.7	Dark	Down	72.0	251.6	Up	02:46:16 - 03:16:16	4051
Cedarville	02:58:29	-18.0	AT	Down	72.3	220.2	Up	02:43:29 - 03:13:29	4011
Beatty	03:00:39	-20.7	Dark	Down	72.9	240.4	Up	02:45:39 - 03:15:39	3995
Chiloquin	02:57:50	-16.7	AT	Down	72.3	213.6	Up	02:42:50 - 03:12:50	3956
Hawthorne	02:59:46	-19.2	Dark	Down	73.4	231.6	Up	02:44:46 - 03:14:46	3950
Klamath Falls	02:57:57	-16.8	AT	Down	72.5	214.4	Up	02:42:57 - 03:12:57	3942
Yuma	03:01:16	-22.3	Dark	Down	72.7	256.7	Up	02:46:16 - 03:16:16	3941
Yerington	02:59:31	-18.8	Dark	Down	73.4	229.1	Up	02:44:31 - 03:14:31	3938
Reno	02:59:11	-18.2	Dark	Down	73.5	225.9	Up	02:44:11 - 03:14:11	3923
Carson City	02:59:19	-18.2	Dark	Down	73.7	226.9	Up	02:44:19 - 03:14:19	3904
Bishop	03:00:12	-19.4	Dark	Down	73.9	235.6	Up	02:45:12 - 03:15:12	3902
Fall River/Burney	02:58:24	-17.0	AT	Down	73.3	218.0	Up	02:43:24 - 03:13:24	3899
Gardnerville	02:59:24	-18.3	Dark	Down	73.8	227.7	Up	02:44:24 - 03:14:24	3893
Portola	02:59:00	-17.7	AT	Down	73.7	223.5	Up	02:44:00 - 03:14:00	3893
Calipatria	03:01:16	-21.6	Dark	Down	73.3	254.2	Up	02:46:16 - 03:16:16	3889
Gimple	02:58:48	-17.4	AT	Down	73.7	221.6	Up	02:43:48 - 03:13:48	3884
Lee Vining	02:59:53	-18.8	Dark	Down	74.0	232.1	Up	02:44:53 - 03:14:53	3883
Greenville	02:58:49	-17.3	AT	Down	73.7	221.4	Up	02:43:49 - 03:13:49	3878
Quincy	02:58:53	-17.3	AT	Down	73.9	221.9	Up	02:43:53 - 03:13:53	3866
Idyllwild	03:01:16	-20.7	Dark	Down	74.1	250.5	Up	02:46:16 - 03:16:16	3827
Wildwood	03:01:16	-19.1	Dark	Down	75.4	246.1	Up	02:46:16 - 03:16:16	3701

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 603108, (2026/02/08 03:00UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 20.64 143
44Zet Per      03:54:07.9 +31:53:01  2.8  8.78 150
56 Ari         03:12:14.2 +27:15:25  5.6  1.67 160
59 Ari         03:19:55.8 +27:04:14  6.7  0.19 159
603108         03:19:45.7 +27:15:29 16.3       159
Positions are for J2000

Event circumstances last updated at 2022/10/31 01:37:14 UT

RECON