RECON: TNO occultation with 118228

Event between (118228) 96TQ66 and star GA1260:01861310 with event index number of 1640038

Geocentric closest approach at 2026/12/01 04:29:38 UTC

J2000 position of star is 05:15:54.7 +37:16:23
Equinox of date position of star is 05:17:17.3 +37:17:39
Stellar brightness G=13.8, use SENSEUP=64
Star is 78 degrees from the moon. Moon is 51% illuminated.
TNO apparent brightness V=25.6

[RECON map]
TNO is 36.0 AU from the Sun and 35.1 AU from the Earth.
The TNO is moving 24.5 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 565 seconds.
The 1-sigma cross-track error in the shadow position is 2782 km.
The sky-plane scale is 25468.0 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=251.2 km assuming a 5% albedo -- 2.5 sec chord
Diameter=102.6 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 118228, (2026/12/01 04:30UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.1 +16:33:41  0.8 22.56  88
3Iot Aur       04:58:45.1 +33:12:22  2.7  5.64  82
PPM 070048     05:15:06.9 +37:21:59  6.5  0.53  78
PPM 070061     05:15:38.6 +37:03:43  7.1  0.48  78
PPM 070105     05:17:47.0 +37:11:59  9.7  0.10  78
118228         05:17:44.4 +37:18:04 13.8        77
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 1.6 sigma about the mid-time.
The median site spacing is 22.4 km RECON observability=1.0 and success probability=18.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 04:32:16 -40.7 Dark Down 43.0 78.8 Up 04:17:16 - 04:47:16 742
Clarence Fulton 04:32:05 -42.7 Dark Down 45.9 83.1 Up 04:17:05 - 04:47:05 725
Peachland 04:32:07 -42.6 Dark Down 45.6 82.3 Up 04:17:07 - 04:47:07 700
Kelowna 04:32:07 -42.8 Dark Down 45.8 82.6 Up 04:17:07 - 04:47:07 698
Summerland 04:32:07 -42.7 Dark Down 45.6 82.2 Up 04:17:07 - 04:47:07 684
Penticton 04:32:08 -42.8 Dark Down 45.7 82.2 Up 04:17:08 - 04:47:08 675
Oliver 04:32:09 -42.9 Dark Down 45.6 81.9 Up 04:17:09 - 04:47:09 645
Anarchist Mountain Observatory 04:32:09 -43.1 Dark Down 45.7 81.8 Up 04:17:09 - 04:47:09 624
Tonasket 04:32:10 -43.2 Dark Down 45.6 81.5 Up 04:17:10 - 04:47:10 600
Okanogan 04:32:11 -43.2 Dark Down 45.5 81.0 Up 04:17:11 - 04:47:11 578
Brewster 04:32:12 -43.1 Dark Down 45.3 80.6 Up 04:17:12 - 04:47:12 563
Manson/Chelan 04:32:13 -42.9 Dark Down 45.1 80.2 Up 04:17:13 - 04:47:13 560
Entiat 04:32:14 -43.0 Dark Down 45.0 79.9 Up 04:17:14 - 04:47:14 544
Wenatchee 04:32:15 -43.0 Dark Down 44.9 79.6 Up 04:17:15 - 04:47:15 527
Ellensburg 04:32:16 -42.9 Dark Down 44.6 79.1 Up 04:17:16 - 04:47:16 501
Yakima 04:32:17 -43.0 Dark Down 44.6 78.7 Up 04:17:17 - 04:47:17 467
Toppenish/White Swan 04:32:18 -43.2 Dark Down 44.6 78.6 Up 04:17:18 - 04:47:18 442
Goldendale 04:32:20 -43.0 Dark Down 44.2 77.8 Up 04:17:20 - 04:47:20 412
The Dalles 04:32:21 -42.8 Dark Down 43.9 77.4 Up 04:17:21 - 04:47:21 408
Pasco 04:32:16 -44.1 Dark Down 45.5 79.2 Up 04:17:16 - 04:47:16 380
Maupin 04:32:22 -43.0 Dark Down 43.9 77.1 Up 04:17:22 - 04:47:22 368
PNWRO 04:32:17 -44.3 Dark Down 45.6 79.1 Up 04:17:17 - 04:47:17 349
Sisters 04:32:26 -42.9 Dark Down 43.4 76.0 Up 04:17:26 - 04:47:26 314
Redmond 04:32:25 -43.2 Dark Down 43.7 76.2 Up 04:17:25 - 04:47:25 295
Bend 04:32:26 -43.1 Dark Down 43.5 75.9 Up 04:17:26 - 04:47:26 283
Oregon Observatory 04:32:26 -43.0 Dark Down 43.4 75.7 Up 04:17:26 - 04:47:26 273
La Pine/Gilchrist 04:32:27 -43.0 Dark Down 43.3 75.5 Up 04:17:27 - 04:47:27 258
North Lake 04:32:27 -43.6 Dark Down 43.6 75.4 Up 04:17:27 - 04:47:27 195
Klamath Falls 04:32:32 -43.1 Dark Down 42.7 74.0 Up 04:17:32 - 04:47:32 145
Paisley 04:32:28 -43.9 Dark Down 43.7 75.1 Up 04:17:28 - 04:47:28 131
Lakeview 04:32:29 -44.2 Dark Down 43.7 74.7 Up 04:17:29 - 04:47:29 78
Fall River/Burney 04:32:34 -43.6 Dark Down 42.7 73.2 Up 04:17:34 - 04:47:34 25
Cedarville 04:32:31 -44.4 Dark Down 43.7 74.2 Up 04:17:31 - 04:47:31 13
Susanville 04:32:34 -44.2 Dark Down 43.0 72.9 Up 04:17:34 - 04:47:34 -64
Greenville 04:32:36 -44.1 Dark Down 42.7 72.6 Up 04:17:36 - 04:47:36 -75
Gimple 04:32:35 -44.1 Dark Down 42.8 72.6 Up 04:17:35 - 04:47:35 -79
Quincy 04:32:36 -44.1 Dark Down 42.7 72.4 Up 04:17:36 - 04:47:36 -94
Portola 04:32:36 -44.5 Dark Down 43.0 72.5 Up 04:17:36 - 04:47:36 -126
Reno 04:32:35 -45.0 Dark Down 43.4 72.5 Up 04:17:35 - 04:47:35 -179
Carson City 04:32:36 -45.1 Dark Down 43.3 72.2 Up 04:17:36 - 04:47:36 -213
Gardnerville 04:32:37 -45.1 Dark Down 43.3 72.0 Up 04:17:37 - 04:47:37 -237
Yerington 04:32:35 -45.6 Dark Down 43.7 72.3 Up 04:17:35 - 04:47:35 -259
Hawthorne 04:32:36 -46.1 Dark Down 44.0 72.1 Up 04:17:36 - 04:47:36 -325
Lee Vining 04:32:38 -45.8 Dark Down 43.4 71.4 Up 04:17:38 - 04:47:38 -354
Tonopah 04:32:34 -47.2 Dark Down 44.9 72.2 Up 04:17:34 - 04:47:34 -431
Bishop 04:32:38 -46.4 Dark Down 43.8 71.1 Up 04:17:38 - 04:47:38 -442
CPSLO 04:32:47 -44.8 Dark Down 41.4 68.6 Up 04:17:47 - 04:47:47 -524
Beatty 04:32:36 -47.8 Dark Down 44.8 71.3 Up 04:17:36 - 04:47:36 -559
Indian Springs 04:32:34 -48.7 Dark Down 45.6 71.3 Up 04:17:34 - 04:47:34 -638
Henderson 04:32:34 -49.3 Dark Down 45.9 71.0 Up 04:17:34 - 04:47:34 -719
Niwot 04:32:04 -55.6 Dark Down 54.3 79.4 Up 04:17:04 - 04:47:04 -730
Wildwood 04:32:45 -46.6 Dark Down 42.5 68.2 Up 04:17:45 - 04:47:45 -734
SwRI 04:32:04 -55.6 Dark Down 54.2 79.2 Up 04:17:04 - 04:47:04 -736
Searchlight/Boulder City 04:32:35 -49.4 Dark Down 45.8 70.5 Up 04:17:35 - 04:47:35 -776
Laughlin/Bullhead City 04:32:35 -49.7 Dark Down 45.9 70.3 Up 04:17:35 - 04:47:35 -820
Patrick 04:32:33 -50.3 Dark Down 46.6 70.7 Up 04:17:33 - 04:47:33 -829
Kingman/Dolan Springs 04:32:34 -50.1 Dark Down 46.3 70.5 Up 04:17:34 - 04:47:34 -841
Mohave Valley 04:32:36 -49.8 Dark Down 45.9 70.0 Up 04:17:36 - 04:47:36 -846
Idyllwild 04:32:43 -48.2 Dark Down 43.8 68.4 Up 04:17:43 - 04:47:43 -856
DCO 04:32:32 -50.9 Dark Down 47.0 70.6 Up 04:17:32 - 04:47:32 -889
Lake Havasu City 04:32:36 -50.0 Dark Down 45.9 69.7 Up 04:17:36 - 04:47:36 -895
Parker 04:32:37 -50.1 Dark Down 45.8 69.4 Up 04:17:37 - 04:47:37 -930
Blythe 04:32:38 -49.9 Dark Down 45.4 68.8 Up 04:17:38 - 04:47:38 -966
Calipatria 04:32:41 -49.2 Dark Down 44.5 68.1 Up 04:17:41 - 04:47:41 -970
Yuma 04:32:40 -50.0 Dark Down 45.0 67.9 Up 04:17:40 - 04:47:40 -1052
George/Scottsdale 04:32:32 -52.1 Dark Down 47.5 69.6 Up 04:17:32 - 04:47:32 -1080

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 118228, (2026/12/01 04:30UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 22.56  88
3Iot Aur       04:56:59.6 +33:09:58  2.7  5.64  82
PPM 070048     05:13:17.2 +37:20:12  6.5  0.53  78
PPM 070061     05:13:49.2 +37:01:57  7.1  0.48  78
PPM 070105     05:15:57.4 +37:10:18  9.7  0.10  78
118228         05:15:54.7 +37:16:23 13.8        78
Positions are for J2000

Event circumstances last updated at 2020/04/03 21:32:53 UT

Marc W. Buie, Southwest Research Institute

RECON