RECON: TNO occultation with 14QY441

Event between 14QY441 and star GA1140:01782487 with event index number of 2515203

Geocentric closest approach at 2026/12/21 08:42:10 UTC

J2000 position of star is 06:03:22.0 +25:27:27
Equinox of date position of star is 06:04:51.2 +25:27:18
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 39 degrees from the moon. Moon is 89% illuminated.
Apparent brightness V=21.4

[RECON map]
Object is 37.1 AU from the Sun and 36.1 AU from the Earth.
Apparent velocity is 25.5 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 136 seconds.
The 1-sigma cross-track error in the shadow position is 1461 km.
The sky-plane scale is 26214.6 km/arcsec.

The object has an absolute magnitude Hv=5.7
Diameter=436.5 km assuming a 5% albedo -- 17.2 sec chord
Diameter=178.2 km assuming a 30% albedo -- 7.0 sec chord
Dynamical classification is 4:3E
 
 
 
 
 
 

Star training set for 14QY441, (2026/12/21 08:52UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:38.0 +07:24:35  0.4 18.16  42
Alnath         05:27:59.9 +28:37:40  1.6  8.83  31
139 Tau        05:59:40.1 +25:57:16  4.7  1.31  38
PPM 095328     06:05:52.1 +25:26:25  8.2  0.19  39
PPM 095305     06:05:08.7 +25:31:49  9.8  0.08  39
14QY441        06:05:02.1 +25:27:17 16.9        40
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 35.0 km RECON observability=1.0 and success probability=61.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:41:14 -55.6 Dark Up 58.0 222.7 Up 08:29:22 - 08:53:06 332
Kamloops 08:41:49 -61.5 Dark Up 63.8 199.1 Up 08:29:57 - 08:53:41 37
Kelowna 08:41:47 -62.1 Dark Up 64.4 201.4 Up 08:29:55 - 08:53:39 -37
Peachland 08:41:47 -62.3 Dark Up 64.6 200.9 Up 08:29:55 - 08:53:39 -51
Summerland 08:41:47 -62.4 Dark Up 64.7 201.2 Up 08:29:55 - 08:53:39 -65
Penticton 08:41:46 -62.4 Dark Up 64.7 201.5 Up 08:29:54 - 08:53:38 -71
Oliver 08:41:46 -62.7 Dark Up 65.0 201.8 Up 08:29:54 - 08:53:38 -106
Anarchist Mountain Observatory 08:41:46 -62.8 Dark Up 65.1 202.3 Up 08:29:54 - 08:53:38 -121
Okanogan 08:41:46 -63.5 Dark Up 65.8 202.4 Up 08:29:54 - 08:53:38 -189
Victoria 08:41:57 -64.2 Dark Up 66.4 194.0 Up 08:30:05 - 08:53:49 -201
Brewster 08:41:46 -63.8 Dark Up 66.1 202.2 Up 08:29:54 - 08:53:38 -218
Manson/Chelan 08:41:47 -64.1 Dark Up 66.4 201.6 Up 08:29:55 - 08:53:39 -242
Wenatchee 08:41:47 -64.6 Dark Up 66.9 201.6 Up 08:29:55 - 08:53:39 -292
Ellensburg 08:41:48 -65.0 Dark Up 67.3 201.5 Up 08:29:56 - 08:53:40 -336
Yakima 08:41:47 -65.4 Dark Up 67.7 201.8 Up 08:29:55 - 08:53:39 -378
Toppenish/White Swan 08:41:47 -65.5 Dark Up 67.8 202.4 Up 08:29:55 - 08:53:39 -399
PNWRO 08:41:42 -65.4 Dark Up 67.8 206.1 Up 08:29:50 - 08:53:34 -424
The Dalles 08:41:49 -66.5 Dark Up 68.8 201.3 Up 08:29:57 - 08:53:41 -485
Maupin 08:41:48 -66.8 Dark Up 69.1 201.9 Up 08:29:56 - 08:53:40 -528
Sisters 08:41:49 -67.8 Dark Up 70.1 201.6 Up 08:29:57 - 08:53:41 -623
Bend 08:41:48 -67.9 Dark Up 70.2 202.5 Up 08:29:56 - 08:53:40 -646
Oregon Observatory 08:41:48 -68.1 Dark Up 70.4 202.3 Up 08:29:56 - 08:53:40 -665
Chiloquin 08:41:49 -69.4 Dark Up 71.8 202.7 Up 08:29:57 - 08:53:41 -807
Dunrhomin 08:40:55 -62.7 Dark Up 65.0 241.1 Up 08:29:03 - 08:52:47 -834
Klamath Falls 08:41:49 -69.7 Dark Up 72.1 203.3 Up 08:29:57 - 08:53:41 -842
Nikitin 08:40:55 -62.8 Dark Up 65.1 241.4 Up 08:29:03 - 08:52:47 -854
CU-SBO 08:40:55 -62.9 Dark Up 65.2 241.4 Up 08:29:03 - 08:52:47 -862
Cedarville 08:41:43 -69.8 Dark Up 72.2 208.6 Up 08:29:51 - 08:53:35 -902
Fall River/Burney 08:41:47 -70.7 Dark Up 73.0 205.9 Up 08:29:55 - 08:53:39 -964
Gimple 08:41:44 -71.3 Dark Up 73.6 208.9 Up 08:29:52 - 08:53:36 -1056
Greenville 08:41:45 -71.3 Dark Up 73.7 208.6 Up 08:29:53 - 08:53:37 -1057
Quincy 08:41:45 -71.5 Dark Up 73.8 209.0 Up 08:29:53 - 08:53:37 -1078
Portola 08:41:43 -71.4 Dark Up 73.8 210.6 Up 08:29:51 - 08:53:35 -1087
Reno 08:41:41 -71.4 Dark Up 73.7 212.9 Up 08:29:49 - 08:53:33 -1110
Carson City 08:41:40 -71.6 Dark Up 74.0 213.6 Up 08:29:48 - 08:53:32 -1148
Yerington 08:41:38 -71.5 Dark Up 73.9 215.8 Up 08:29:46 - 08:53:30 -1162
Gardnerville 08:41:40 -71.8 Dark Up 74.2 214.2 Up 08:29:48 - 08:53:32 -1174
Hawthorne 08:41:36 -71.6 Dark Up 74.0 218.2 Up 08:29:44 - 08:53:28 -1207
Lee Vining 08:41:37 -72.3 Dark Up 74.7 218.1 Up 08:29:45 - 08:53:29 -1272
Bishop 08:41:35 -72.4 Dark Up 74.8 221.5 Up 08:29:43 - 08:53:27 -1329
Beatty 08:41:29 -71.9 Dark Up 74.2 227.0 Up 08:29:37 - 08:53:21 -1361
Patrick 08:41:18 -71.0 Dark Up 73.3 237.6 Up 08:29:26 - 08:53:10 -1484
Laughlin/Bullhead City 08:41:20 -71.6 Dark Up 73.9 236.8 Up 08:29:28 - 08:53:12 -1520
Lake Havasu City 08:41:19 -71.9 Dark Up 74.1 239.4 Up 08:29:27 - 08:53:11 -1589
George/Scottsdale 08:41:10 -70.5 Dark Up 72.7 246.1 Up 08:29:18 - 08:53:02 -1638
Wildwood 08:41:33 -74.9 Dark Up 77.2 230.4 Up 08:29:41 - 08:53:25 -1685
Idyllwild 08:41:26 -73.9 Dark Up 76.2 236.5 Up 08:29:34 - 08:53:18 -1702
Calipatria 08:41:22 -73.4 Dark Up 75.7 241.3 Up 08:29:30 - 08:53:14 -1754
Yuma 08:41:19 -73.0 Dark Up 75.2 244.5 Up 08:29:27 - 08:53:11 -1788

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 14QY441, (2026/12/21 08:52UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 18.16  42
Alnath         05:26:17.6 +28:36:23  1.6  8.83  31
139 Tau        05:57:59.6 +25:57:14  4.7  1.31  38
PPM 095328     06:04:12.1 +25:26:37  8.2  0.19  39
PPM 095305     06:03:28.6 +25:31:59  9.8  0.08  39
14QY441        06:03:22.0 +25:27:27 16.9        39
Positions are for J2000

Event circumstances last updated at 2024/01/09 04:32:15 UT

Marc W. Buie, Southwest Research Institute

RECON