RECON: TNO occultation with 12UD178

Event between 12UD178 and star GA1140:01284964 with event index number of 2141817

Geocentric closest approach at 2024/11/25 08:46:55 UTC

J2000 position of star is 05:33:43.8 +25:53:04
Equinox of date position of star is 05:35:05.2 +25:53:53
Stellar brightness G=15.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 95 degrees from the moon. Moon is 29% illuminated.
TNO apparent brightness V=23.0

[RECON map]
TNO is 37.3 AU from the Sun and 36.3 AU from the Earth.
The TNO is moving 23.0 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 217 seconds.
The 1-sigma cross-track error in the shadow position is 1641 km.
The sky-plane scale is 26362.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=204.2 km assuming a 5% albedo -- 8.9 sec chord
Diameter=83.4 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 

Star training set for 12UD178, (2024/11/25 08:55UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.1 +16:33:27  0.8 16.39 109
Alnath         05:27:52.1 +28:37:34  1.6  3.18  96
PPM 094572     05:38:42.3 +26:56:16  5.6  1.29  94
PPM 094544     05:37:35.6 +26:16:56  8.3  0.65  94
PPM 094470     05:34:30.2 +25:54:35  9.3  0.17  95
12UD178        05:35:16.4 +25:54:00 15.5        94
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 4.2 sigma about the mid-time.
The median site spacing is 27.2 km RECON observability=1.0 and success probability=30.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:46:37 -51.6 Dark Up 63.3 194.3 Up 08:31:37 - 09:01:37 2265
Kamloops 08:47:20 -58.0 Dark Down 64.6 164.8 Up 08:32:20 - 09:02:20 2115
Kelowna 08:47:18 -58.5 Dark Down 65.5 166.2 Up 08:32:18 - 09:02:18 2030
Peachland 08:47:19 -58.7 Dark Down 65.6 165.6 Up 08:32:19 - 09:02:19 2020
Summerland 08:47:19 -58.8 Dark Down 65.8 165.7 Up 08:32:19 - 09:02:19 2004
Penticton 08:47:18 -58.8 Dark Down 65.8 165.9 Up 08:32:18 - 09:02:18 1997
Oliver 08:47:19 -59.1 Dark Down 66.2 165.7 Up 08:32:19 - 09:02:19 1961
Anarchist Mountain Observatory 08:47:18 -59.2 Dark Down 66.4 166.0 Up 08:32:18 - 09:02:18 1943
Tonasket 08:47:18 -59.5 Dark Down 66.7 165.7 Up 08:32:18 - 09:02:18 1912
Victoria 08:47:31 -60.8 Dark Down 66.0 157.0 Up 08:32:31 - 09:02:31 1909
Okanogan 08:47:19 -59.8 Dark Down 67.0 165.2 Up 08:32:19 - 09:02:19 1878
Brewster 08:47:20 -60.1 Dark Down 67.2 164.5 Up 08:32:20 - 09:02:20 1850
Manson/Chelan 08:47:21 -60.4 Dark Down 67.3 163.6 Up 08:32:21 - 09:02:21 1830
Wenatchee 08:47:22 -60.9 Dark Down 67.8 162.9 Up 08:32:22 - 09:02:22 1782
Ellensburg 08:47:23 -61.3 Dark Down 68.1 162.0 Up 08:32:23 - 09:02:23 1740
Yakima 08:47:23 -61.7 Dark Down 68.5 161.7 Up 08:32:23 - 09:02:23 1698
Toppenish/White Swan 08:47:22 -61.8 Dark Down 68.7 161.9 Up 08:32:22 - 09:02:22 1675
Pasco 08:47:18 -61.5 Dark Down 69.1 164.9 Up 08:32:18 - 09:02:18 1658
PNWRO 08:47:17 -61.6 Dark Down 69.4 165.3 Up 08:32:17 - 09:02:17 1632
Goldendale 08:47:24 -62.4 Dark Down 69.2 160.4 Up 08:32:24 - 09:02:24 1619
The Dalles 08:47:25 -62.8 Dark Down 69.3 159.3 Up 08:32:25 - 09:02:25 1597
Maupin 08:47:25 -63.1 Dark Down 69.7 159.2 Up 08:32:25 - 09:02:25 1552
Sisters 08:47:27 -64.0 Dark Down 70.4 157.1 Up 08:32:27 - 09:02:27 1462
Redmond 08:47:26 -63.9 Dark Down 70.5 158.1 Up 08:32:26 - 09:02:26 1458
Bend 08:47:27 -64.1 Dark Down 70.7 157.5 Up 08:32:27 - 09:02:27 1436
Oregon Observatory 08:47:27 -64.3 Dark Down 70.8 157.0 Up 08:32:27 - 09:02:27 1418
La Pine/Gilchrist 08:47:27 -64.5 Dark Down 71.0 156.6 Up 08:32:27 - 09:02:27 1397
North Lake 08:47:25 -64.7 Dark Down 71.5 157.7 Up 08:32:25 - 09:02:25 1349
Paisley 08:47:24 -65.0 Dark Down 72.2 158.0 Up 08:32:24 - 09:02:24 1289
Chiloquin 08:47:29 -65.6 Dark Down 71.9 154.3 Up 08:32:29 - 09:02:29 1281
Klamath Falls 08:47:29 -65.9 Dark Down 72.2 154.0 Up 08:32:29 - 09:02:29 1244
Lakeview 08:47:24 -65.3 Dark Down 72.7 157.9 Up 08:32:24 - 09:02:24 1234
Cedarville 08:47:23 -65.8 Dark Down 73.3 157.6 Up 08:32:23 - 09:02:23 1163
Fall River/Burney 08:47:28 -66.7 Dark Down 73.4 153.4 Up 08:32:28 - 09:02:28 1117
Susanville 08:47:25 -66.9 Dark Down 74.2 154.7 Up 08:32:25 - 09:02:25 1046
Dunrhomin 08:46:29 -58.2 Dark Up 74.2 206.8 Up 08:31:29 - 09:01:29 1041
Greenville 08:47:27 -67.3 Dark Down 74.4 153.3 Up 08:32:27 - 09:02:27 1017
Gimple 08:47:26 -67.2 Dark Down 74.4 153.6 Up 08:32:26 - 09:02:26 1017
Quincy 08:47:27 -67.4 Dark Down 74.5 153.0 Up 08:32:27 - 09:02:27 996
Portola 08:47:25 -67.3 Dark Down 74.8 154.3 Up 08:32:25 - 09:02:25 980
Reno 08:47:23 -67.2 Dark Down 75.3 156.0 Up 08:32:23 - 09:02:23 949
Carson City 08:47:23 -67.5 Dark Down 75.6 155.5 Up 08:32:23 - 09:02:23 910
Yerington 08:47:21 -67.3 Dark Down 76.0 157.3 Up 08:32:21 - 09:02:21 887
Gardnerville 08:47:23 -67.6 Dark Down 75.8 155.2 Up 08:32:23 - 09:02:23 884
Hawthorne 08:47:19 -67.4 Dark Down 76.6 158.5 Up 08:32:19 - 09:02:19 835
Tonopah 08:47:14 -66.9 Dark Down 77.4 163.1 Up 08:32:14 - 09:02:14 781
Lee Vining 08:47:21 -68.0 Dark Down 76.9 155.8 Up 08:32:21 - 09:02:21 776
Bishop 08:47:18 -68.1 Dark Down 77.7 157.5 Up 08:32:18 - 09:02:18 708
Beatty 08:47:12 -67.4 Dark Down 78.6 163.4 Up 08:32:12 - 09:02:12 654
Indian Springs 08:47:08 -67.0 Dark Down 79.1 167.9 Up 08:32:08 - 09:02:08 617
Henderson 08:47:05 -66.8 Dark Down 79.7 170.6 Up 08:32:05 - 09:02:05 558
CPSLO 08:47:27 -70.8 Dark Down 78.6 143.8 Up 08:32:27 - 09:02:27 492
Patrick 08:47:01 -66.5 Dark Down 80.5 175.9 Up 08:32:01 - 09:02:01 490
Kingman/Dolan Springs 08:47:02 -66.7 Dark Down 80.7 174.8 Up 08:32:02 - 09:02:02 465
Laughlin/Bullhead City 08:47:04 -67.1 Dark Down 80.6 172.0 Up 08:32:04 - 09:02:04 463
Mohave Valley 08:47:04 -67.2 Dark Down 80.9 171.8 Up 08:32:04 - 09:02:04 433
Lake Havasu City 08:47:03 -67.3 Dark Down 81.3 172.8 Up 08:32:03 - 09:02:03 389
Wildwood 08:47:20 -70.3 Dark Down 80.6 148.9 Up 08:32:20 - 09:02:20 352
Parker 08:47:03 -67.4 Dark Down 81.7 172.7 Up 08:32:03 - 09:02:03 350
Idyllwild 08:47:12 -69.3 Dark Down 81.6 157.7 Up 08:32:12 - 09:02:12 308
George/Scottsdale 08:46:53 -65.9 Dark Down 82.1 188.1 Up 08:31:53 - 09:01:53 306
Blythe 08:47:04 -67.9 Dark Down 82.2 170.3 Up 08:32:04 - 09:02:04 293
Calipatria 08:47:08 -68.8 Dark Down 82.5 163.4 Up 08:32:08 - 09:02:08 239
Yuma 08:47:04 -68.4 Dark Down 83.1 168.7 Up 08:32:04 - 09:02:04 191

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 12UD178, (2024/11/25 08:55UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 16.39 109
Alnath         05:26:17.6 +28:36:23  1.6  3.18  96
PPM 094572     05:37:08.9 +26:55:28  5.6  1.29  94
PPM 094544     05:36:02.7 +26:16:05  8.3  0.65  94
PPM 094470     05:32:57.6 +25:53:38  9.3  0.17  95
12UD178        05:33:43.8 +25:53:04 15.5        95
Positions are for J2000

Event circumstances last updated at 2021/11/16 01:01:39 UT

Marc W. Buie, Southwest Research Institute

RECON