RECON: TNO occultation with 13TE172

Event between 13TE172 and star GA1040:00282084 with event index number of 2675831

Geocentric closest approach at 2026/11/28 09:26:30 UTC

J2000 position of star is 02:57:06.5 +14:12:05
Equinox of date position of star is 02:58:25.9 +14:17:48
Stellar brightness G=15.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 73 degrees from the moon. Moon is 80% illuminated.
Apparent brightness V=22.7

[RECON map]
Object is 36.7 AU from the Sun and 35.7 AU from the Earth.
Apparent velocity is 23.8 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 174 seconds.
The 1-sigma cross-track error in the shadow position is 4311 km.
The sky-plane scale is 25917.8 km/arcsec.

The object has an absolute magnitude Hv=7.1
Diameter=226.0 km assuming a 5% albedo -- 9.5 sec chord
Diameter=92.2 km assuming a 30% albedo -- 3.9 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 13TE172, (2026/11/28 09:23UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:28.1 +16:33:41  0.8 23.92  50
Menkar         03:03:41.4 +04:11:37  2.5 10.19  75
43Sig Ari      02:52:59.0 +15:11:29  5.5  1.62  74
PPM 118669     02:57:09.6 +14:48:50  8.0  0.61  73
PPM 118703     02:59:16.8 +14:10:35  9.3  0.21  73
PPM 118701     02:59:02.1 +14:26:22 10.7  0.17  73
13TE172        02:58:35.6 +14:18:30 15.1        73
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 32.9 km RECON observability=1.0 and success probability=12.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:23:43 -47.5 Dark Up 30.6 252.8 Up 09:08:45 - 09:38:42 3472
Kamloops 09:24:08 -55.3 Dark Up 39.3 240.0 Up 09:09:09 - 09:39:06 3254
Kelowna 09:24:04 -55.5 Dark Up 39.3 241.5 Up 09:09:06 - 09:39:03 3182
Peachland 09:24:05 -55.7 Dark Up 39.5 241.3 Up 09:09:06 - 09:39:03 3171
Summerland 09:24:04 -55.8 Dark Up 39.5 241.5 Up 09:09:06 - 09:39:03 3157
Penticton 09:24:04 -55.8 Dark Up 39.5 241.6 Up 09:09:05 - 09:39:02 3151
Oliver 09:24:03 -56.0 Dark Up 39.6 241.9 Up 09:09:05 - 09:39:02 3119
Anarchist Mountain Observatory 09:24:02 -56.1 Dark Up 39.6 242.2 Up 09:09:04 - 09:39:01 3104
Victoria 09:24:11 -58.2 Dark Up 42.1 238.4 Up 09:09:12 - 09:39:09 3042
Okanogan 09:24:02 -56.6 Dark Up 40.0 242.4 Up 09:09:03 - 09:39:00 3042
Brewster 09:24:02 -56.9 Dark Up 40.3 242.4 Up 09:09:03 - 09:39:00 3015
Manson/Chelan 09:24:02 -57.3 Dark Up 40.6 242.2 Up 09:09:03 - 09:39:00 2994
Wenatchee 09:24:02 -57.7 Dark Up 40.9 242.4 Up 09:09:03 - 09:39:00 2948
Ellensburg 09:24:01 -58.1 Dark Up 41.2 242.5 Up 09:09:03 - 09:39:00 2908
Yakima 09:24:01 -58.4 Dark Up 41.4 242.8 Up 09:09:02 - 09:38:59 2869
Toppenish/White Swan 09:24:00 -58.4 Dark Up 41.4 243.1 Up 09:09:02 - 09:38:59 2849
PNWRO 09:23:56 -57.9 Dark Up 40.7 244.9 Up 09:08:58 - 09:38:55 2820
The Dalles 09:24:01 -59.4 Dark Up 42.3 243.0 Up 09:09:03 - 09:39:00 2770
Maupin 09:24:00 -59.6 Dark Up 42.4 243.4 Up 09:09:01 - 09:38:58 2730
Sisters 09:24:00 -60.5 Dark Up 43.1 243.7 Up 09:09:01 - 09:38:58 2642
Bend 09:23:58 -60.5 Dark Up 43.0 244.1 Up 09:09:00 - 09:38:57 2620
Oregon Observatory 09:23:59 -60.7 Dark Up 43.2 244.1 Up 09:09:00 - 09:38:57 2602
Chiloquin 09:23:58 -61.8 Dark Up 44.1 244.8 Up 09:08:59 - 09:38:56 2470
Klamath Falls 09:23:57 -62.0 Dark Up 44.1 245.2 Up 09:08:59 - 09:38:56 2436
Cedarville 09:23:52 -61.5 Dark Up 43.3 247.3 Up 09:08:53 - 09:38:50 2374
Dunrhomin 09:23:15 -52.2 Dark Up 32.9 260.5 Up 09:08:17 - 09:38:14 2362
Nikitin 09:23:15 -52.3 Dark Up 33.0 260.6 Up 09:08:17 - 09:38:14 2343
CU-SBO 09:23:15 -52.3 Dark Up 33.0 260.6 Up 09:08:16 - 09:38:13 2336
Fall River/Burney 09:23:55 -62.6 Dark Up 44.4 246.6 Up 09:08:56 - 09:38:53 2319
Gimple 09:23:52 -62.8 Dark Up 44.4 247.9 Up 09:08:53 - 09:38:50 2230
Greenville 09:23:52 -62.9 Dark Up 44.4 247.9 Up 09:08:53 - 09:38:50 2229
Quincy 09:23:52 -63.0 Dark Up 44.5 248.0 Up 09:08:53 - 09:38:50 2209
Portola 09:23:50 -62.8 Dark Up 44.2 248.6 Up 09:08:52 - 09:38:49 2198
Reno 09:23:48 -62.5 Dark Up 43.8 249.4 Up 09:08:50 - 09:38:47 2174
Carson City 09:23:47 -62.7 Dark Up 43.9 249.8 Up 09:08:49 - 09:38:46 2138
Yerington 09:23:46 -62.4 Dark Up 43.6 250.5 Up 09:08:47 - 09:38:44 2121
Gardnerville 09:23:47 -62.8 Dark Up 44.0 250.0 Up 09:08:49 - 09:38:46 2113
Hawthorne 09:23:44 -62.3 Dark Up 43.3 251.3 Up 09:08:45 - 09:38:42 2076
Lee Vining 09:23:44 -62.9 Dark Up 43.9 251.4 Up 09:08:45 - 09:38:42 2016
Bishop 09:23:41 -62.7 Dark Up 43.5 252.6 Up 09:08:43 - 09:38:40 1958
Beatty 09:23:36 -61.8 Dark Up 42.4 254.3 Up 09:08:38 - 09:38:35 1920
Patrick 09:23:27 -60.2 Dark Up 40.5 257.8 Up 09:08:28 - 09:38:25 1786
Laughlin/Bullhead City 09:23:28 -60.9 Dark Up 41.1 257.5 Up 09:08:30 - 09:38:27 1755
Lake Havasu City 09:23:27 -60.9 Dark Up 41.1 258.2 Up 09:08:28 - 09:38:25 1686
George/Scottsdale 09:23:20 -59.2 Dark Up 39.2 260.5 Up 09:08:21 - 09:38:18 1625
Wildwood 09:23:38 -64.3 Dark Up 44.6 255.5 Up 09:08:39 - 09:38:36 1615
Idyllwild 09:23:32 -63.0 Dark Up 43.2 257.2 Up 09:08:34 - 09:38:31 1589
Calipatria 09:23:28 -62.3 Dark Up 42.3 258.6 Up 09:08:30 - 09:38:27 1533
Yuma 09:23:25 -61.7 Dark Up 41.7 259.6 Up 09:08:27 - 09:38:24 1494

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 13TE172, (2026/11/28 09:23UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 23.92  50
Menkar         03:02:16.8 +04:05:21  2.5 10.19  75
43Sig Ari      02:51:29.6 +15:04:55  5.5  1.62  74
PPM 118669     02:55:40.3 +14:42:23  8.0  0.61  73
PPM 118703     02:57:47.7 +14:04:12  9.3  0.21  73
PPM 118701     02:57:32.9 +14:19:58 10.7  0.17  73
13TE172        02:57:06.5 +14:12:05 15.1        73
Positions are for J2000

Event circumstances last updated at 2023/12/23 04:23:02 UT

Marc W. Buie, Southwest Research Institute

RECON