RECON: TNO occultation with 69990

Event between (69990) 98WU31 and star GA1080:02252660 with event index number of 1524650

Geocentric closest approach at 2026/02/01 09:32:32 UTC

J2000 position of star is 06:39:14.9 +18:31:18
Equinox of date position of star is 06:40:40.9 +18:29:53
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 27 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=23.9

[RECON map]
Object is 36.9 AU from the Sun and 36.0 AU from the Earth.
Apparent velocity is 20.5 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 633 seconds.
The 1-sigma cross-track error in the shadow position is 3640 km.
The sky-plane scale is 26134.8 km/arcsec.

The object has an absolute magnitude Hv=8.2
Diameter=144.5 km assuming a 5% albedo -- 6.8 sec chord
Diameter=59.0 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69990, (2026/02/01 09:33UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:35.1 +07:24:35  0.4 15.44  41
Alhena         06:39:13.1 +16:22:29  1.9  2.15  28
26 Gem         06:43:55.4 +17:37:04  5.3  1.15  27
PPM 122779     06:39:17.4 +18:22:38  7.4  0.37  28
PPM 122833     06:41:19.6 +18:34:43 10.5  0.15  27
69990          06:40:46.6 +18:29:47 16.2        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 1.4 sigma about the mid-time.
The median site spacing is 20.3 km RECON observability=1.0 and success probability=14.8%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	09:29:59	-46.3	Dark	Up	27.7	264.8	Low	09:14:59 - 09:44:59	884
Kamloops	09:30:15	-53.2	Dark	Up	36.8	253.3	Up	09:15:15 - 09:45:15	455
Kelowna	09:30:11	-53.6	Dark	Up	36.5	254.7	Up	09:15:11 - 09:45:11	414
Peachland	09:30:11	-53.7	Dark	Up	36.7	254.5	Up	09:15:11 - 09:45:11	399
Summerland	09:30:10	-53.8	Dark	Up	36.7	254.7	Up	09:15:10 - 09:45:10	389
Penticton	09:30:10	-53.9	Dark	Up	36.6	254.8	Up	09:15:10 - 09:45:10	387
Oliver	09:30:08	-54.2	Dark	Up	36.7	255.1	Up	09:15:08 - 09:45:08	360
Anarchist Mountain Observatory	09:30:07	-54.2	Dark	Up	36.6	255.4	Up	09:15:07 - 09:45:07	352
Okanogan	09:30:05	-54.9	Dark	Up	37.0	255.6	Up	09:15:05 - 09:45:05	296
Brewster	09:30:05	-55.2	Dark	Up	37.2	255.7	Up	09:15:05 - 09:45:05	270
Manson/Chelan	09:30:05	-55.5	Dark	Up	37.4	255.5	Up	09:15:05 - 09:45:05	245
Victoria	09:30:14	-56.0	Dark	Up	39.3	252.1	Up	09:15:14 - 09:45:14	219
Wenatchee	09:30:03	-55.9	Dark	Up	37.7	255.7	Up	09:15:03 - 09:45:03	204
Ellensburg	09:30:02	-56.4	Dark	Up	37.9	255.8	Up	09:15:02 - 09:45:02	166
Yakima	09:30:01	-56.7	Dark	Up	38.0	256.1	Up	09:15:01 - 09:45:01	133
PNWRO	09:29:55	-56.5	Dark	Up	37.1	257.9	Up	09:14:55 - 09:44:55	127
Toppenish/White Swan	09:30:00	-56.8	Dark	Up	38.0	256.4	Up	09:15:00 - 09:45:00	119
The Dalles	09:29:59	-57.8	Dark	Up	38.7	256.3	Up	09:14:59 - 09:44:59	37
Dunrhomin	09:29:11	-52.8	Dark	Up	27.7	271.4	Low	09:14:11 - 09:44:11	31
Nikitin	09:29:10	-52.9	Dark	Up	27.8	271.5	Low	09:14:10 - 09:44:10	15
CU-SBO	09:29:10	-53.0	Dark	Up	27.8	271.5	Low	09:14:10 - 09:44:10	8
Maupin	09:29:57	-58.1	Dark	Up	38.7	256.7	Up	09:14:57 - 09:44:57	5
Sisters	09:29:55	-59.0	Dark	Up	39.3	257.0	Up	09:14:55 - 09:44:55	-80
Bend	09:29:54	-59.1	Dark	Up	39.2	257.4	Up	09:14:54 - 09:44:54	-93
Oregon Observatory	09:29:53	-59.3	Dark	Up	39.3	257.4	Up	09:14:53 - 09:44:53	-110
Chiloquin	09:29:50	-60.6	Dark	Up	39.9	258.2	Up	09:14:50 - 09:44:50	-233
Klamath Falls	09:29:49	-60.8	Dark	Up	39.9	258.5	Up	09:14:49 - 09:44:49	-260
Cedarville	09:29:42	-60.6	Dark	Up	38.9	260.3	Up	09:14:42 - 09:44:42	-277
Fall River/Burney	09:29:44	-61.6	Dark	Up	39.8	259.7	Up	09:14:44 - 09:44:44	-351
Gimple	09:29:40	-62.1	Dark	Up	39.6	260.9	Up	09:14:40 - 09:44:40	-416
Greenville	09:29:40	-62.1	Dark	Up	39.7	260.8	Up	09:14:40 - 09:44:40	-418
Portola	09:29:38	-62.1	Dark	Up	39.4	261.4	Up	09:14:38 - 09:44:38	-434
Quincy	09:29:39	-62.3	Dark	Up	39.7	261.0	Up	09:14:39 - 09:44:39	-436
Reno	09:29:35	-62.0	Dark	Up	38.9	262.1	Up	09:14:35 - 09:44:35	-440
Yerington	09:29:32	-62.1	Dark	Up	38.5	263.0	Up	09:14:32 - 09:44:32	-470
Carson City	09:29:34	-62.3	Dark	Up	39.0	262.4	Up	09:14:34 - 09:44:34	-470
Gardnerville	09:29:33	-62.4	Dark	Up	39.0	262.6	Up	09:14:33 - 09:44:33	-491
Hawthorne	09:29:29	-62.1	Dark	Up	38.1	263.7	Up	09:14:29 - 09:44:29	-496
Lee Vining	09:29:29	-62.8	Dark	Up	38.6	263.8	Up	09:14:29 - 09:44:29	-560
Beatty	09:29:20	-62.1	Dark	Up	36.8	266.2	Up	09:14:20 - 09:44:20	-588
Bishop	09:29:25	-62.8	Dark	Up	38.1	264.8	Up	09:14:25 - 09:44:25	-593
Patrick	09:29:09	-61.1	Dark	Up	34.6	269.0	Up	09:14:09 - 09:44:09	-636
Laughlin/Bullhead City	09:29:10	-61.8	Dark	Up	35.2	268.8	Up	09:14:10 - 09:44:10	-679
George/Scottsdale	09:29:00	-60.6	Dark	Up	33.0	271.3	Up	09:14:00 - 09:44:00	-728
Lake Havasu City	09:29:07	-62.0	Dark	Up	35.0	269.4	Up	09:14:07 - 09:44:07	-732
Idyllwild	09:29:10	-64.0	Dark	Up	37.0	268.6	Up	09:14:10 - 09:44:10	-873
Calipatria	09:29:06	-63.5	Dark	Up	36.0	269.7	Up	09:14:06 - 09:44:06	-894
Wildwood	09:29:16	-65.1	Dark	Up	38.5	267.2	Up	09:14:16 - 09:44:16	-896
Yuma	09:29:02	-63.1	Dark	Up	35.3	270.5	Up	09:14:02 - 09:44:02	-907

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 69990, (2026/02/01 09:33UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 15.44  41
Alhena         06:37:42.8 +16:23:57  1.9  2.15  28
26 Gem         06:42:24.3 +17:38:42  5.3  1.15  27
PPM 122779     06:37:45.8 +18:24:05  7.4  0.37  28
PPM 122833     06:39:47.8 +18:36:15 10.5  0.15  27
69990          06:39:14.9 +18:31:18 16.2        27
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:24:05 UT

RECON