RECON: TNO occultation with 04TF282

Event between 04TF282 and star GA1000:00994631 with event index number of 1551266

Geocentric closest approach at 2026/10/17 09:14:12 UTC

J2000 position of star is 05:45:38.0 +11:06:12
Equinox of date position of star is 05:46:44.8 +11:06:36
Stellar brightness G=15.2, use SENSEUP=128
Star is 159 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 43.0 AU from the Sun and 42.6 AU from the Earth.
The TNO is moving 11.7 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 809 seconds.
The 1-sigma cross-track error in the shadow position is 4611 km.
The sky-plane scale is 30863.3 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=345.2 km assuming a 5% albedo -- 29.3 sec chord
Diameter=140.9 km assuming a 30% albedo -- 12.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 04TF282, (2026/10/17 09:14UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:37.4 +07:24:35  0.4  4.38 157
Bellatrix      05:26:34.2 +06:22:18  1.6  6.95 152
PPM 149523     05:51:31.3 +09:52:37  6.4  1.64 159
PPM 121369     05:47:29.3 +10:48:26  8.5  0.32 159
PPM 121349     05:46:28.5 +11:02:53  9.6  0.17 159
04TF282        05:47:07.4 +11:06:44 15.2       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 1.1 sigma about the mid-time.
The median site spacing is 10.7 km RECON observability=1.0 and success probability=6.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 09:13:34 -47.8 Dark Down 36.8 118.9 Up 08:58:34 - 09:28:34 -3460
Clarence Fulton 09:13:11 -45.0 Dark Down 38.2 124.2 Up 08:58:11 - 09:28:11 -3581
Summerland 09:13:17 -45.6 Dark Down 38.3 123.4 Up 08:58:17 - 09:28:17 -3584
Kelowna 09:13:14 -45.4 Dark Down 38.3 123.8 Up 08:58:14 - 09:28:14 -3585
Penticton 09:13:16 -45.7 Dark Down 38.4 123.5 Up 08:58:16 - 09:28:16 -3591
Oliver 09:13:20 -46.0 Dark Down 38.6 123.2 Up 08:58:20 - 09:28:20 -3600
Manson/Chelan 09:13:33 -47.2 Dark Down 39.0 121.8 Up 08:58:33 - 09:28:33 -3613
Anarchist Mountain Observatory 09:13:23 -46.0 Dark Down 38.8 123.3 Up 08:58:23 - 09:28:23 -3613
Entiat 09:13:36 -47.4 Dark Down 39.1 121.6 Up 08:58:36 - 09:28:36 -3617
Tonasket 09:13:23 -46.3 Dark Down 39.0 123.1 Up 08:58:23 - 09:28:23 -3620
Wenatchee 09:13:35 -47.7 Dark Down 39.2 121.3 Up 08:58:35 - 09:28:35 -3620
Brewster 09:13:28 -46.9 Dark Down 39.1 122.3 Up 08:58:28 - 09:28:28 -3623
Ellensburg 09:13:41 -48.1 Dark Down 39.3 120.8 Up 08:58:41 - 09:28:41 -3623
Okanogan 09:13:25 -46.6 Dark Down 39.1 122.7 Up 08:58:25 - 09:28:25 -3623
Yakima 09:13:43 -48.5 Dark Down 39.5 120.5 Up 08:58:43 - 09:28:43 -3635
The Dalles 09:13:52 -49.5 Dark Down 39.6 119.2 Up 08:58:52 - 09:28:52 -3640
Goldendale 09:13:50 -49.2 Dark Down 39.7 119.7 Up 08:58:50 - 09:28:50 -3648
Toppenish/White Swan 09:13:46 -48.6 Dark Down 39.7 120.5 Up 08:58:46 - 09:28:46 -3650
Maupin 09:13:57 -49.8 Dark Down 39.9 119.0 Up 08:58:57 - 09:28:57 -3658
Sisters 09:14:07 -50.7 Dark Down 40.0 117.9 Up 08:59:07 - 09:29:07 -3666
Redmond 09:14:02 -50.6 Dark Down 40.3 118.3 Up 08:59:02 - 09:29:02 -3684
Bend 09:14:05 -50.8 Dark Down 40.3 118.0 Up 08:59:05 - 09:29:05 -3685
Oregon Observatory 09:14:10 -51.0 Dark Down 40.3 117.8 Up 08:59:10 - 09:29:10 -3685
La Pine/Gilchrist 09:14:11 -51.2 Dark Down 40.4 117.6 Up 08:59:11 - 09:29:11 -3690
Pasco 09:13:41 -48.2 Dark Down 40.5 121.7 Up 08:58:41 - 09:28:41 -3710
PNWRO 09:13:42 -48.3 Dark Down 40.8 121.8 Up 08:58:42 - 09:28:42 -3728
Klamath Falls 09:14:22 -52.5 Dark Down 40.9 116.2 Up 08:59:22 - 09:29:22 -3730
North Lake 09:14:11 -51.3 Dark Down 41.0 117.8 Up 08:59:11 - 09:29:11 -3733
Paisley 09:14:14 -51.6 Dark Down 41.5 117.8 Up 08:59:14 - 09:29:14 -3770
Fall River/Burney 09:14:30 -53.3 Dark Down 41.7 115.7 Up 08:59:30 - 09:29:30 -3793
Lakeview 09:14:17 -51.9 Dark Down 41.8 117.6 Up 08:59:17 - 09:29:17 -3798
Cedarville 09:14:24 -52.4 Dark Down 42.3 117.2 Up 08:59:24 - 09:29:24 -3832
Greenville 09:14:36 -53.8 Dark Down 42.4 115.4 Up 08:59:36 - 09:29:36 -3851
Susanville 09:14:33 -53.5 Dark Down 42.5 115.9 Up 08:59:33 - 09:29:33 -3854
Gimple 09:14:37 -53.8 Dark Down 42.5 115.5 Up 08:59:37 - 09:29:37 -3856
Quincy 09:14:39 -54.0 Dark Down 42.5 115.3 Up 08:59:39 - 09:29:39 -3860
Portola 09:14:38 -53.8 Dark Down 42.9 115.6 Up 08:59:38 - 09:29:38 -3888
Reno 09:14:37 -53.7 Dark Down 43.5 116.0 Up 08:59:37 - 09:29:37 -3931
Carson City 09:14:40 -54.0 Dark Down 43.6 115.7 Up 08:59:40 - 09:29:40 -3948
Gardnerville 09:14:41 -54.1 Dark Down 43.8 115.6 Up 08:59:41 - 09:29:41 -3961
Yerington 09:14:39 -53.8 Dark Down 44.2 116.2 Up 08:59:39 - 09:29:39 -3987
Hawthorne 09:14:43 -53.9 Dark Down 44.7 116.3 Up 08:59:43 - 09:29:43 -4035
Lee Vining 09:14:48 -54.5 Dark Down 44.7 115.3 Up 08:59:48 - 09:29:48 -4035
CPSLO 09:15:14 -57.3 Dark Down 44.7 111.6 Up 09:00:14 - 09:30:14 -4082
Bishop 09:14:54 -54.6 Dark Down 45.5 115.5 Up 08:59:54 - 09:29:54 -4100
Tonopah 09:14:40 -53.5 Dark Down 45.9 117.2 Up 08:59:40 - 09:29:40 -4128
Beatty 09:14:51 -54.0 Dark Down 46.8 116.6 Up 08:59:51 - 09:29:51 -4207
Wildwood 09:15:16 -56.9 Dark Down 46.7 112.3 Up 09:00:16 - 09:30:16 -4250
Indian Springs 09:14:47 -53.6 Dark Down 47.7 117.4 Up 08:59:47 - 09:29:47 -4280
Henderson 09:14:46 -53.5 Dark Down 48.5 117.5 Up 08:59:46 - 09:29:46 -4344
Idyllwild 09:15:11 -56.0 Dark Down 48.3 113.6 Up 09:00:11 - 09:30:11 -4370
Searchlight/Boulder City 09:14:50 -53.8 Dark Down 48.8 117.0 Up 08:59:50 - 09:29:50 -4377
Laughlin/Bullhead City 09:14:52 -53.8 Dark Down 49.2 117.1 Up 08:59:52 - 09:29:52 -4412
Mohave Valley 09:14:53 -54.0 Dark Down 49.3 116.8 Up 08:59:53 - 09:29:53 -4426
Patrick 09:14:45 -53.2 Dark Down 49.6 118.0 Up 08:59:45 - 09:29:45 -4437
Kingman/Dolan Springs 09:14:51 -53.4 Dark Down 49.5 117.6 Up 08:59:51 - 09:29:51 -4438
Lake Havasu City 09:14:56 -54.0 Dark Down 49.7 116.7 Up 08:59:56 - 09:29:56 -4461
Calipatria 09:15:11 -55.6 Dark Down 49.4 114.1 Up 09:00:11 - 09:30:11 -4468
Parker 09:14:58 -54.2 Dark Down 49.9 116.3 Up 08:59:58 - 09:29:58 -4482
DCO 09:14:47 -52.9 Dark Down 50.2 118.5 Up 08:59:47 - 09:29:47 -4492
Blythe 09:15:04 -54.7 Dark Down 49.9 115.5 Up 09:00:04 - 09:30:04 -4494
Yuma 09:15:11 -55.3 Dark Down 50.3 114.5 Up 09:00:11 - 09:30:11 -4542
George/Scottsdale 09:14:51 -52.8 Dark Down 51.8 118.3 Up 08:59:51 - 09:29:51 -4640
Niwot 09:13:34 -45.1 Dark Down 52.3 132.7 Up 08:58:34 - 09:28:34 -4661
SwRI 09:13:35 -45.2 Dark Down 52.3 132.4 Up 08:58:35 - 09:28:35 -4662

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 04TF282, (2026/10/17 09:14UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  4.38 157
Bellatrix      05:25:07.8 +06:20:58  1.6  6.95 152
PPM 149523     05:50:02.7 +09:52:15  6.4  1.64 159
PPM 121369     05:46:00.1 +10:47:55  8.5  0.32 159
PPM 121349     05:44:59.2 +11:02:20  9.6  0.17 159
04TF282        05:45:38.0 +11:06:12 15.2       159
Positions are for J2000

Event circumstances last updated at 2020/01/08 19:54:15 UT

Marc W. Buie, Southwest Research Institute

RECON