RECON: TNO occultation with 03YJ179

Event between 03YJ179 and star GA1140:02446508 with event index number of 2006676

Geocentric closest approach at 2026/01/05 03:32:59 UTC

J2000 position of star is 06:41:19.0 +24:28:39
Equinox of date position of star is 06:42:40.8 +24:27:18
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 29 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 40.4 AU from the Sun and 39.5 AU from the Earth.
The TNO is moving 25.3 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 823 seconds.
The 1-sigma cross-track error in the shadow position is 4705 km.
The sky-plane scale is 28625.0 km/arcsec.

The TNO has an absolute magnitude Hv=6.9
Diameter=247.8 km assuming a 5% albedo -- 9.8 sec chord
Diameter=101.1 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03YJ179, (2026/01/05 03:33UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:54.5 +27:57:40  1.1 14.77  16
Alhena         06:39:12.8 +16:22:29  1.9  8.12  31
PPM 096264     06:39:02.9 +24:34:01  6.5  0.89  30
PPM 096322     06:41:07.1 +24:34:31  6.9  0.43  29
PPM 096371     06:42:47.3 +24:37:47  9.1  0.18  29
03YJ179        06:42:54.5 +24:27:04 15.6        29
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 27.6 km RECON observability=1.0 and success probability=9.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:35:30 -31.2 Dark Up 36.2 94.8 Up 03:20:30 - 03:50:30 -2739
Kelowna 03:35:31 -31.8 Dark Up 36.8 94.9 Up 03:20:31 - 03:50:31 -2831
Peachland 03:35:32 -31.7 Dark Up 36.7 94.6 Up 03:20:32 - 03:50:32 -2834
Summerland 03:35:32 -31.7 Dark Up 36.7 94.6 Up 03:20:32 - 03:50:32 -2849
Victoria 03:35:40 -29.3 Dark Up 34.4 90.9 Up 03:20:40 - 03:50:40 -2852
Penticton 03:35:32 -31.8 Dark Up 36.8 94.6 Up 03:20:32 - 03:50:32 -2857
Oliver 03:35:33 -31.8 Dark Up 36.9 94.3 Up 03:20:33 - 03:50:33 -2888
Anarchist Mountain Observatory 03:35:33 -31.9 Dark Up 37.0 94.4 Up 03:20:33 - 03:50:33 -2908
Sleaford 03:35:03 -39.9 Dark Up 44.7 108.7 Up 03:20:03 - 03:50:03 -2910
Tonasket 03:35:34 -31.9 Dark Up 37.0 94.1 Up 03:20:34 - 03:50:34 -2934
Okanogan 03:35:35 -31.8 Dark Up 36.9 93.7 Up 03:20:35 - 03:50:35 -2960
Brewster 03:35:36 -31.7 Dark Up 36.8 93.4 Up 03:20:36 - 03:50:36 -2979
Manson/Chelan 03:35:37 -31.4 Dark Up 36.5 92.9 Up 03:20:37 - 03:50:37 -2989
Wenatchee 03:35:39 -31.3 Dark Up 36.5 92.4 Up 03:20:39 - 03:50:39 -3027
Ellensburg 03:35:40 -31.2 Dark Up 36.3 92.0 Up 03:20:40 - 03:50:40 -3059
Yakima 03:35:41 -31.2 Dark Up 36.3 91.7 Up 03:20:41 - 03:50:41 -3095
Toppenish/White Swan 03:35:42 -31.3 Dark Up 36.5 91.6 Up 03:20:42 - 03:50:42 -3119
Goldendale 03:35:43 -31.0 Dark Up 36.2 90.9 Up 03:20:43 - 03:50:43 -3158
The Dalles 03:35:44 -30.7 Dark Up 35.9 90.5 Up 03:20:44 - 03:50:44 -3169
PNWRO 03:35:40 -32.3 Dark Up 37.5 92.5 Up 03:20:40 - 03:50:40 -3190
Maupin 03:35:46 -30.8 Dark Up 36.0 90.3 Up 03:20:46 - 03:50:46 -3210
Sisters 03:35:48 -30.4 Dark Up 35.7 89.3 Up 03:20:48 - 03:50:48 -3277
Bend 03:35:48 -30.6 Dark Up 35.8 89.3 Up 03:20:48 - 03:50:48 -3306
Oregon Observatory 03:35:49 -30.5 Dark Up 35.8 89.1 Up 03:20:49 - 03:50:49 -3318
North Lake 03:35:50 -30.8 Dark Up 36.1 89.0 Up 03:20:50 - 03:50:50 -3392
Chiloquin 03:35:53 -30.1 Dark Up 35.4 87.9 Up 03:20:53 - 03:50:53 -3429
Klamath Falls 03:35:54 -30.1 Dark Up 35.5 87.7 Up 03:20:54 - 03:50:54 -3463
Lakeview 03:35:51 -31.2 Dark Up 36.5 88.6 Up 03:20:51 - 03:50:51 -3506
Cedarville 03:35:53 -31.3 Dark Up 36.6 88.2 Up 03:20:53 - 03:50:53 -3573
Fall River/Burney 03:35:56 -30.3 Dark Up 35.7 87.1 Up 03:20:56 - 03:50:56 -3585
Susanville 03:35:56 -30.9 Dark Up 36.2 87.1 Up 03:20:56 - 03:50:56 -3666
Greenville 03:35:57 -30.6 Dark Up 36.0 86.7 Up 03:20:57 - 03:50:57 -3684
Gimple 03:35:57 -30.7 Dark Up 36.1 86.8 Up 03:20:57 - 03:50:57 -3686
Quincy 03:35:58 -30.6 Dark Up 36.0 86.6 Up 03:20:58 - 03:50:58 -3703
Portola 03:35:57 -30.9 Dark Up 36.4 86.8 Up 03:20:57 - 03:50:57 -3729
Reno 03:35:57 -31.4 Dark Up 36.8 87.0 Up 03:20:57 - 03:50:57 -3773
Carson City 03:35:57 -31.4 Dark Up 36.8 86.7 Up 03:20:57 - 03:50:57 -3808
Gardnerville 03:35:58 -31.4 Dark Up 36.9 86.6 Up 03:20:58 - 03:50:58 -3833
Yerington 03:35:57 -31.9 Dark Up 37.3 87.0 Up 03:20:57 - 03:50:57 -3845
Hawthorne 03:35:57 -32.3 Dark Up 37.7 86.9 Up 03:20:57 - 03:50:57 -3905
Lee Vining 03:35:58 -31.8 Dark Up 37.3 86.2 Up 03:20:58 - 03:50:58 -3946
Tonopah 03:35:55 -33.3 Dark Up 38.8 87.4 Up 03:20:55 - 03:50:55 -3990
Bishop 03:35:59 -32.4 Dark Up 37.8 86.2 Up 03:20:59 - 03:50:59 -4025
Dunrhomin 03:35:26 -42.6 Dark Up 47.9 97.4 Up 03:20:26 - 03:50:26 -4067
CU-SBO 03:35:27 -42.5 Dark Up 47.9 97.0 Up 03:20:27 - 03:50:27 -4090
Beatty 03:35:57 -33.6 Dark Up 39.1 86.7 Up 03:20:57 - 03:50:57 -4117
Indian Springs 03:35:55 -34.4 Dark Up 39.9 87.0 Up 03:20:55 - 03:50:55 -4179
Henderson 03:35:55 -35.0 Dark Up 40.5 87.0 Up 03:20:55 - 03:50:55 -4252
Wildwood 03:36:05 -31.9 Dark Up 37.4 83.5 Up 03:21:05 - 03:51:05 -4344
Patrick 03:35:53 -35.8 Dark Up 41.3 87.0 Up 03:20:53 - 03:50:53 -4346
Laughlin/Bullhead City 03:35:55 -35.2 Dark Up 40.8 86.5 Up 03:20:55 - 03:50:55 -4351
Kingman/Dolan Springs 03:35:55 -35.7 Dark Up 41.2 86.7 Up 03:20:55 - 03:50:55 -4363
Mohave Valley 03:35:56 -35.2 Dark Up 40.7 86.2 Up 03:20:56 - 03:50:56 -4379
Lake Havasu City 03:35:56 -35.4 Dark Up 40.9 86.0 Up 03:20:56 - 03:50:56 -4426
Idyllwild 03:36:02 -33.4 Dark Up 38.9 84.2 Up 03:21:02 - 03:51:02 -4435
Parker 03:35:56 -35.4 Dark Up 40.9 85.7 Up 03:20:56 - 03:50:56 -4463
Calipatria 03:36:01 -34.3 Dark Up 39.8 84.3 Up 03:21:01 - 03:51:01 -4532
George/Scottsdale 03:35:52 -37.4 Dark Up 42.9 86.6 Up 03:20:52 - 03:50:52 -4573
Yuma 03:36:00 -35.0 Dark Up 40.5 84.3 Up 03:21:00 - 03:51:00 -4601

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 03YJ179, (2026/01/05 03:33UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 14.77  16
Alhena         06:37:42.8 +16:23:57  1.9  8.12  31
PPM 096264     06:37:27.2 +24:35:27  6.5  0.89  30
PPM 096322     06:39:31.5 +24:36:03  6.9  0.43  29
PPM 096371     06:41:11.6 +24:39:22  9.1  0.18  29
03YJ179        06:41:19.0 +24:28:39 15.6        29
Positions are for J2000

Event circumstances last updated at 2022/04/12 23:07:46 UT

Marc W. Buie, Southwest Research Institute

RECON