RECON: TNO occultation with 118228

Event between (118228) 96TQ66 and star GA1260:01869081 with event index number of 2111190

Geocentric closest approach at 2026/11/27 02:11:45 UTC

J2000 position of star is 05:16:23.0 +37:16:19
Equinox of date position of star is 05:18:01.7 +37:17:49
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 21 degrees from the moon. Moon is 91% illuminated.
Apparent brightness V=22.8

[RECON map]
Object is 36.0 AU from the Sun and 35.1 AU from the Earth.
Apparent velocity is 24.0 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 387 seconds.
The 1-sigma cross-track error in the shadow position is 2042 km.
The sky-plane scale is 25477.7 km/arcsec.

The object has an absolute magnitude Hv=7.2
Diameter=224.9 km assuming a 5% albedo -- 9.2 sec chord
Diameter=91.8 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 118228, (2026/11/27 02:12UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.0 +16:33:41  0.8 22.60  31
3Iot Aur       04:58:45.0 +33:12:22  2.7  5.70  24
PPM 070048     05:15:06.8 +37:21:59  6.5  0.62  22
PPM 070061     05:15:38.6 +37:03:43  7.1  0.56  22
PPM 070105     05:17:46.9 +37:11:59  9.7  0.13  21
118228         05:18:12.7 +37:17:59 16.4        21
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 2.3 sigma about the mid-time.
The median site spacing is 17.2 km RECON observability=0.4 and success probability=7.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 02:14:43 -17.8 AT Up 19.7 55.5 Really Low 01:59:43 - 02:29:43 4295
Kamloops 02:14:38 -20.2 Dark Up 22.5 58.1 Low 01:59:38 - 02:29:38 4270
Peachland 02:14:41 -20.4 Dark Up 22.3 58.1 Low 01:59:41 - 02:29:41 4198
Kelowna 02:14:41 -20.6 Dark Up 22.6 58.4 Low 01:59:41 - 02:29:41 4190
Summerland 02:14:42 -20.4 Dark Up 22.3 58.2 Low 01:59:42 - 02:29:42 4186
Penticton 02:14:42 -20.5 Dark Up 22.4 58.2 Low 01:59:42 - 02:29:42 4177
Oliver 02:14:43 -20.5 Dark Up 22.2 58.1 Low 01:59:43 - 02:29:43 4159
Anarchist Mountain Observatory 02:14:44 -20.6 Dark Up 22.2 58.1 Low 01:59:44 - 02:29:44 4142
Okanogan 02:14:46 -20.3 Dark Up 21.7 57.8 Low 01:59:46 - 02:29:46 4117
Manson/Chelan 02:14:47 -19.9 Dark Up 21.1 57.3 Low 01:59:47 - 02:29:47 4117
Brewster 02:14:47 -20.1 Dark Up 21.5 57.6 Low 01:59:47 - 02:29:47 4111
Wenatchee 02:14:49 -19.7 Dark Up 20.8 57.0 Low 01:59:49 - 02:29:49 4099
Ellensburg 02:14:50 -19.5 Dark Up 20.5 56.8 Low 01:59:50 - 02:29:50 4087
Yakima 02:14:51 -19.4 Dark Up 20.2 56.6 Low 01:59:51 - 02:29:51 4065
Toppenish/White Swan 02:14:52 -19.4 Dark Up 20.2 56.7 Low 01:59:52 - 02:29:52 4046
The Dalles 02:14:54 -18.8 Dark Down 19.3 56.0 Really Low 01:59:54 - 02:29:54 4039
Maupin 02:14:56 -18.8 Dark Down 19.1 55.9 Really Low 01:59:56 - 02:29:56 4011
Sisters 02:14:58 -18.2 Dark Down 18.4 55.4 Really Low 01:59:58 - 02:29:58 3985
Bend 02:14:59 -18.4 Dark Down 18.4 55.5 Really Low 01:59:59 - 02:29:59 3959
Oregon Observatory 02:15:00 -18.3 Dark Down 18.2 55.4 Really Low 02:00:00 - 02:30:00 3956
PNWRO 02:14:54 -20.4 Dark Up 20.9 57.4 Low 01:59:54 - 02:29:54 3955
Chiloquin 02:15:03 -17.7 AT Down 17.2 54.8 Really Low 02:00:03 - 02:30:03 3900
Klamath Falls 02:15:04 -17.7 AT Down 17.1 54.8 Really Low 02:00:04 - 02:30:04 3875
Fall River/Burney 02:15:08 -17.7 AT Down 16.6 54.7 Really Low 02:00:08 - 02:30:08 3786
Cedarville 02:15:07 -18.7 Dark Down 17.7 55.5 Really Low 02:00:07 - 02:30:07 3753
Sleaford 02:14:34 -29.2 Dark Up 31.2 67.9 Up 01:59:34 - 02:29:34 3740
Greenville 02:15:11 -17.8 AT Down 16.4 54.7 Really Low 02:00:11 - 02:30:11 3707
Gimple 02:15:11 -17.9 AT Down 16.4 54.8 Really Low 02:00:11 - 02:30:11 3703
Quincy 02:15:11 -17.8 AT Down 16.3 54.7 Really Low 02:00:11 - 02:30:11 3694
Portola 02:15:12 -18.1 Dark Down 16.5 54.9 Really Low 02:00:12 - 02:30:12 3662
Reno 02:15:13 -18.6 Dark Down 16.8 55.2 Really Low 02:00:13 - 02:30:13 3611
Carson City 02:15:14 -18.5 Dark Down 16.6 55.1 Really Low 02:00:14 - 02:30:14 3587
Gardnerville 02:15:15 -18.5 Dark Down 16.5 55.0 Really Low 02:00:15 - 02:30:15 3569
Yerington 02:15:15 -18.9 Dark Down 16.9 55.3 Really Low 02:00:15 - 02:30:15 3542
Hawthorne 02:15:17 -19.3 Dark Down 17.0 55.5 Really Low 02:00:17 - 02:30:17 3483
Lee Vining 02:15:18 -18.8 Dark Down 16.3 55.1 Really Low 02:00:18 - 02:30:18 3473
Bishop 02:15:20 -19.2 Dark Down 16.5 55.3 Really Low 02:00:20 - 02:30:20 3394
Beatty 02:15:22 -20.4 Dark Down 17.3 56.0 Really Low 02:00:22 - 02:30:22 3274
Wildwood 02:15:28 -18.3 Dark Down 14.5 54.5 Really Low 02:00:28 - 02:30:28 3181
Idyllwild 02:15:30 -19.8 Dark Down 15.6 55.2 Really Low 02:00:30 - 02:30:30 3050
Laughlin/Bullhead City 02:15:27 -21.8 Dark Down 17.8 56.5 Really Low 02:00:27 - 02:30:27 3033
Patrick 02:15:27 -22.4 Dark Down 18.4 56.9 Really Low 02:00:27 - 02:30:27 3012
Lake Havasu City 02:15:29 -21.9 Dark Down 17.6 56.4 Really Low 02:00:29 - 02:30:29 2970
Calipatria 02:15:32 -20.6 Dark Down 16.0 55.6 Really Low 02:00:32 - 02:30:32 2938
Dunrhomin 02:15:12 -29.8 Dark Up 26.8 62.5 Low 02:00:12 - 02:30:12 2902
Nikitin 02:15:13 -29.8 Dark Up 26.7 62.4 Low 02:00:13 - 02:30:13 2889
CU-SBO 02:15:13 -29.7 Dark Up 26.6 62.3 Low 02:00:13 - 02:30:13 2888
Yuma 02:15:33 -21.3 Dark Down 16.4 55.9 Really Low 02:00:33 - 02:30:33 2856
George/Scottsdale 02:15:31 -23.8 Dark Down 18.9 57.2 Really Low 02:00:31 - 02:30:31 2775

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, (2026/11/27 02:12UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 22.60  31
3Iot Aur       04:56:59.6 +33:09:58  2.7  5.70  24
PPM 070048     05:13:17.2 +37:20:12  6.5  0.62  22
PPM 070061     05:13:49.2 +37:01:57  7.1  0.56  22
PPM 070105     05:15:57.4 +37:10:18  9.7  0.13  21
118228         05:16:23.0 +37:16:19 16.4        21
Positions are for J2000

Event circumstances last updated at 2024/03/21 22:31:39 UT

Marc W. Buie, Southwest Research Institute

RECON