RECON: TNO occultation with 208996

Event between (208996) 03AZ84 and star GA0940:03288136 with event index number of 2177589

Geocentric closest approach at 2026/03/02 05:49:25 UTC

J2000 position of star is 08:44:41.7 +05:30:20
Equinox of date position of star is 08:45:52.4 +05:25:25
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 19 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=20.2

[RECON map]
TNO is 43.6 AU from the Sun and 42.8 AU from the Earth.
The TNO is moving 22.4 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 98 seconds.
The 1-sigma cross-track error in the shadow position is 1905 km.
The sky-plane scale is 31007.6 km/arcsec.

The TNO has an absolute magnitude Hv=3.8
Diameter=1042.4 km assuming a 5% albedo -- 47.5 sec chord
Diameter=425.5 km assuming a 30% albedo -- 19.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 208996, (2026/03/02 05:51UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:45.8 +11:50:18  1.3 21.65   4
Alphard        09:28:52.4 -08:46:24  2.0 17.75  24
13Rho Hya      08:49:49.0 +05:44:22  4.3  0.99  18
10 Hya         08:46:24.4 +05:35:03  7.0  0.19  19
208996         08:46:04.7 +05:24:33 15.4        19
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 18.2 km RECON observability=1.0 and success probability=12.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:50:14 -41.8 Dark Up 42.6 194.3 Up 05:41:37 - 05:58:52 -2480
Kamloops 05:50:53 -37.4 Dark Up 44.7 174.7 Up 05:42:16 - 05:59:31 -2956
Kelowna 05:50:50 -38.4 Dark Up 45.6 175.9 Up 05:42:13 - 05:59:28 -2993
Peachland 05:50:50 -38.3 Dark Up 45.7 175.5 Up 05:42:13 - 05:59:28 -3010
Summerland 05:50:50 -38.5 Dark Up 45.8 175.6 Up 05:42:13 - 05:59:28 -3018
Penticton 05:50:50 -38.6 Dark Up 45.9 175.7 Up 05:42:13 - 05:59:28 -3021
Oliver 05:50:49 -38.8 Dark Up 46.3 175.7 Up 05:42:12 - 05:59:27 -3047
Anarchist Mountain Observatory 05:50:48 -39.0 Dark Up 46.4 176.0 Up 05:42:11 - 05:59:26 -3055
Tonasket 05:50:48 -39.2 Dark Up 46.7 175.8 Up 05:42:11 - 05:59:26 -3081
Okanogan 05:50:48 -39.3 Dark Up 47.1 175.6 Up 05:42:11 - 05:59:26 -3111
Brewster 05:50:49 -39.4 Dark Up 47.3 175.3 Up 05:42:11 - 05:59:26 -3138
Manson/Chelan 05:50:50 -39.4 Dark Up 47.5 174.7 Up 05:42:12 - 05:59:27 -3164
Victoria 05:51:01 -37.3 Dark Up 46.6 170.1 Up 05:42:23 - 05:59:38 -3201
Wenatchee 05:50:50 -39.6 Dark Up 48.0 174.4 Up 05:42:12 - 05:59:27 -3206
Ellensburg 05:50:50 -39.8 Dark Up 48.4 174.0 Up 05:42:12 - 05:59:27 -3245
PNWRO 05:50:44 -41.3 Dark Up 49.4 176.4 Up 05:42:06 - 05:59:21 -3277
Yakima 05:50:50 -40.0 Dark Up 48.8 174.0 Up 05:42:12 - 05:59:27 -3277
Toppenish/White Swan 05:50:48 -40.3 Dark Up 49.0 174.2 Up 05:42:11 - 05:59:26 -3290
Dunrhomin 05:49:49 -52.1 Dark Up 53.8 199.0 Up 05:41:12 - 05:58:27 -3316
CU-SBO 05:49:48 -52.3 Dark Up 54.1 199.0 Up 05:41:11 - 05:58:26 -3339
Goldendale 05:50:49 -40.4 Dark Up 49.5 173.5 Up 05:42:12 - 05:59:27 -3346
The Dalles 05:50:50 -40.3 Dark Up 49.7 172.9 Up 05:42:13 - 05:59:28 -3375
Maupin 05:50:49 -40.7 Dark Up 50.1 173.0 Up 05:42:12 - 05:59:27 -3406
Sisters 05:50:50 -40.9 Dark Up 51.0 172.1 Up 05:42:13 - 05:59:28 -3493
Bend 05:50:49 -41.2 Dark Up 51.2 172.4 Up 05:42:12 - 05:59:27 -3505
Oregon Observatory 05:50:50 -41.3 Dark Up 51.4 172.2 Up 05:42:13 - 05:59:28 -3523
North Lake 05:50:47 -42.0 Dark Up 52.1 173.0 Up 05:42:10 - 05:59:25 -3561
Lakeview 05:50:44 -42.9 Dark Up 53.2 173.7 Up 05:42:06 - 05:59:21 -3633
Chiloquin 05:50:49 -41.8 Dark Up 52.6 171.3 Up 05:42:12 - 05:59:27 -3646
Klamath Falls 05:50:48 -42.1 Dark Up 53.0 171.4 Up 05:42:11 - 05:59:26 -3673
Cedarville 05:50:43 -43.4 Dark Up 53.8 173.9 Up 05:42:05 - 05:59:20 -3684
Fall River/Burney 05:50:46 -43.0 Dark Up 54.2 171.7 Up 05:42:08 - 05:59:23 -3763
Susanville 05:50:42 -43.8 Dark Up 54.9 172.9 Up 05:42:05 - 05:59:20 -3794
Gimple 05:50:43 -43.8 Dark Up 55.2 172.5 Up 05:42:05 - 05:59:20 -3825
Greenville 05:50:43 -43.8 Dark Up 55.1 172.3 Up 05:42:06 - 05:59:21 -3827
Portola 05:50:41 -44.3 Dark Up 55.5 173.1 Up 05:42:03 - 05:59:18 -3841
Reno 05:50:38 -44.8 Dark Up 55.8 174.2 Up 05:42:01 - 05:59:16 -3844
Quincy 05:50:43 -43.9 Dark Up 55.3 172.3 Up 05:42:06 - 05:59:21 -3845
Yerington 05:50:35 -45.6 Dark Up 56.4 175.2 Up 05:41:58 - 05:59:13 -3871
Carson City 05:50:38 -45.0 Dark Up 56.2 174.1 Up 05:42:00 - 05:59:15 -3874
Tonopah 05:50:28 -47.3 Dark Up 57.4 178.6 Up 05:41:51 - 05:59:06 -3890
Gardnerville 05:50:38 -45.2 Dark Up 56.4 174.2 Up 05:42:00 - 05:59:15 -3894
Hawthorne 05:50:33 -46.2 Dark Up 56.9 176.1 Up 05:41:55 - 05:59:10 -3895
Lee Vining 05:50:34 -46.2 Dark Up 57.5 175.2 Up 05:41:56 - 05:59:11 -3960
Indian Springs 05:50:19 -49.2 Dark Up 58.9 181.5 Up 05:41:42 - 05:58:57 -3970
Beatty 05:50:24 -48.3 Dark Up 58.6 179.4 Up 05:41:46 - 05:59:01 -3977
Bishop 05:50:31 -47.0 Dark Up 58.1 176.4 Up 05:41:53 - 05:59:08 -3990
Henderson 05:50:15 -49.9 Dark Up 59.4 182.8 Up 05:41:38 - 05:58:53 -3994
Patrick 05:50:11 -51.0 Dark Up 60.0 185.1 Up 05:41:34 - 05:58:49 -4012
Kingman/Dolan Springs 05:50:11 -51.0 Dark Up 60.2 184.7 Up 05:41:33 - 05:58:48 -4038
Laughlin/Bullhead City 05:50:13 -50.7 Dark Up 60.3 183.7 Up 05:41:36 - 05:58:51 -4058
Mohave Valley 05:50:12 -50.9 Dark Up 60.6 183.7 Up 05:41:35 - 05:58:50 -4082
George/Scottsdale 05:50:00 -53.3 Dark Up 61.5 189.4 Up 05:41:23 - 05:58:38 -4093
Lake Havasu City 05:50:12 -51.3 Dark Up 60.9 184.3 Up 05:41:35 - 05:58:50 -4109
Parker 05:50:10 -51.5 Dark Up 61.3 184.4 Up 05:41:32 - 05:58:47 -4140
Idyllwild 05:50:19 -50.2 Dark Up 61.8 179.4 Up 05:41:41 - 05:58:56 -4259
Calipatria 05:50:14 -51.3 Dark Up 62.4 181.9 Up 05:41:37 - 05:58:52 -4275
Yuma 05:50:11 -52.2 Dark Up 62.8 183.9 Up 05:41:33 - 05:58:48 -4283
Wildwood 05:50:26 -48.7 Dark Up 61.3 175.6 Up 05:41:49 - 05:59:04 -4291

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 208996, (2026/03/02 05:51UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 21.65   4
Alphard        09:27:35.2 -08:39:30  2.0 17.75  24
13Rho Hya      08:48:26.0 +05:50:15  4.3  0.99  18
10 Hya         08:45:01.3 +05:40:50  7.0  0.19  19
208996         08:44:41.7 +05:30:20 15.4        19
Positions are for J2000

Event circumstances last updated at 2022/04/13 23:15:42 UT

Marc W. Buie, Southwest Research Institute

RECON