RECON: TNO occultation with 12UK177

Event between 12UK177 and star GA1140:00426201 with event index number of 2086548

Geocentric closest approach at 2024/03/03 05:23:48 UTC

J2000 position of star is 03:19:37.4 +25:41:26
Equinox of date position of star is 03:21:02.5 +25:46:32
Stellar brightness G=13.5, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 166 degrees from the moon. Moon is 54% illuminated.
Apparent brightness V=24.4

[RECON map]
Object is 35.4 AU from the Sun and 35.7 AU from the Earth.
Apparent velocity is 16.2 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 558 seconds.
The 1-sigma cross-track error in the shadow position is 3347 km.
The sky-plane scale is 25858.5 km/arcsec.

The object has an absolute magnitude Hv=8.7
Diameter=109.1 km assuming a 5% albedo -- 6.7 sec chord
Diameter=44.6 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 12UK177, (2024/03/03 05:24UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:18.6 +16:33:22  0.8 19.99 170
44Zet Per      03:55:39.5 +31:57:12  2.8  9.77 171
64 Ari         03:25:44.4 +24:48:29  5.5  1.43 167
60 Ari         03:21:51.9 +25:44:54  7.4  0.18 166
PPM 092395     03:21:21.7 +25:42:03 11.1  0.10 166
12UK177        03:21:03.6 +25:46:37 13.5       166
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 1.6 sigma about the mid-time.
The median site spacing is 16.1 km RECON observability=0.9 and success probability=1.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 05:27:09 -39.4 Dark Down 21.5 284.6 Low 05:12:09 - 05:42:09 10356
Kamloops 05:27:10 -34.1 Dark Down 30.1 274.7 Up 05:12:10 - 05:42:10 9826
Kelowna 05:27:16 -35.1 Dark Down 29.5 275.9 Low 05:12:16 - 05:42:16 9804
Peachland 05:27:15 -35.0 Dark Down 29.7 275.7 Low 05:12:15 - 05:42:15 9787
Summerland 05:27:17 -35.1 Dark Down 29.6 275.9 Low 05:12:17 - 05:42:17 9781
Penticton 05:27:18 -35.2 Dark Down 29.5 276.0 Low 05:12:18 - 05:42:18 9780
Oliver 05:27:18 -35.4 Dark Down 29.5 276.2 Low 05:12:18 - 05:42:18 9757
Anarchist Mountain Observatory 05:27:20 -35.6 Dark Down 29.3 276.4 Low 05:12:20 - 05:42:20 9753
Okanogan 05:27:24 -35.9 Dark Down 29.4 276.6 Low 05:12:24 - 05:42:24 9703
Dunrhomin 05:28:12 -49.1 Dark Down 17.4 289.3 Really Low 05:13:12 - 05:43:12 9681
Brewster 05:27:24 -36.0 Dark Down 29.5 276.6 Low 05:12:24 - 05:42:24 9679
Nikitin 05:28:13 -49.2 Dark Down 17.3 289.3 Really Low 05:13:13 - 05:43:13 9668
CU-SBO 05:28:13 -49.2 Dark Down 17.4 289.3 Really Low 05:13:13 - 05:43:13 9661
Manson/Chelan 05:27:26 -35.9 Dark Down 29.7 276.5 Low 05:12:26 - 05:42:26 9653
Wenatchee 05:27:27 -36.1 Dark Down 29.8 276.7 Low 05:12:27 - 05:42:27 9615
Victoria 05:27:18 -33.7 Dark Down 31.9 273.8 Up 05:12:18 - 05:42:18 9586
Ellensburg 05:27:29 -36.2 Dark Down 29.8 276.7 Low 05:12:29 - 05:42:29 9580
PNWRO 05:27:37 -37.7 Dark Down 28.6 278.4 Low 05:12:37 - 05:42:37 9570
Yakima 05:27:32 -36.4 Dark Down 29.8 277.0 Low 05:12:32 - 05:42:32 9552
Toppenish/White Swan 05:27:33 -36.7 Dark Down 29.7 277.2 Low 05:12:33 - 05:42:33 9543
The Dalles 05:27:37 -36.7 Dark Down 30.1 277.1 Up 05:12:37 - 05:42:37 9461
Maupin 05:27:38 -37.0 Dark Down 30.0 277.5 Low 05:12:38 - 05:42:38 9436
Sisters 05:27:42 -37.1 Dark Down 30.2 277.6 Up 05:12:42 - 05:42:42 9356
Bend 05:27:43 -37.4 Dark Down 30.0 278.0 Low 05:12:43 - 05:42:43 9348
Oregon Observatory 05:27:44 -37.5 Dark Down 30.0 278.0 Up 05:12:44 - 05:42:44 9331
Chiloquin 05:27:50 -37.9 Dark Down 30.1 278.5 Up 05:12:50 - 05:42:50 9220
Cedarville 05:27:58 -39.5 Dark Down 28.7 280.1 Low 05:12:58 - 05:42:58 9207
Klamath Falls 05:27:52 -38.1 Dark Down 30.0 278.7 Up 05:12:52 - 05:42:52 9198
Fall River/Burney 05:28:00 -39.0 Dark Down 29.5 279.6 Low 05:13:00 - 05:43:00 9124
Gimple 05:28:04 -39.8 Dark Down 28.9 280.5 Low 05:13:04 - 05:43:04 9076
Greenville 05:28:04 -39.8 Dark Down 29.0 280.4 Low 05:13:04 - 05:43:04 9073
Reno 05:28:09 -40.8 Dark Down 28.0 281.4 Low 05:13:09 - 05:43:09 9072
Portola 05:28:06 -40.3 Dark Down 28.6 280.9 Low 05:13:06 - 05:43:06 9067
Quincy 05:28:04 -39.9 Dark Down 29.0 280.5 Low 05:13:04 - 05:43:04 9058
Yerington 05:28:12 -41.6 Dark Down 27.4 282.0 Low 05:13:12 - 05:43:12 9055
Carson City 05:28:09 -41.0 Dark Down 27.9 281.6 Low 05:13:09 - 05:43:09 9045
Hawthorne 05:28:14 -42.2 Dark Down 26.9 282.6 Low 05:13:14 - 05:43:14 9041
Gardnerville 05:28:11 -41.2 Dark Down 27.8 281.7 Low 05:13:11 - 05:43:11 9029
Patrick 05:28:33 -47.1 Dark Down 22.4 286.4 Low 05:13:33 - 05:43:33 8993
Beatty 05:28:23 -44.3 Dark Down 25.0 284.3 Low 05:13:23 - 05:43:23 8991
Lee Vining 05:28:16 -42.1 Dark Down 27.1 282.6 Low 05:13:16 - 05:43:16 8978
Bishop 05:28:20 -42.9 Dark Down 26.4 283.3 Low 05:13:20 - 05:43:20 8961
Laughlin/Bullhead City 05:28:33 -46.8 Dark Down 22.9 286.2 Low 05:13:33 - 05:43:33 8945
George/Scottsdale 05:28:42 -49.5 Dark Down 20.3 288.0 Low 05:13:42 - 05:43:42 8944
Lake Havasu City 05:28:37 -47.3 Dark Down 22.5 286.6 Low 05:13:37 - 05:43:37 8903
Yuma 05:28:45 -48.1 Dark Down 22.2 287.2 Low 05:13:45 - 05:43:45 8747
Idyllwild 05:28:38 -46.0 Dark Down 24.1 285.8 Low 05:13:38 - 05:43:38 8744
Calipatria 05:28:42 -47.2 Dark Down 23.0 286.6 Low 05:13:42 - 05:43:42 8744
Wildwood 05:28:35 -44.4 Dark Down 25.8 284.8 Low 05:13:35 - 05:43:35 8693

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 12UK177, (2024/03/03 05:24UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 19.99 170
44Zet Per      03:54:07.9 +31:53:01  2.8  9.77 171
64 Ari         03:24:18.5 +24:43:25  5.5  1.43 167
60 Ari         03:20:25.6 +25:39:44  7.4  0.18 166
PPM 092395     03:19:55.4 +25:36:53 11.1  0.10 166
12UK177        03:19:37.4 +25:41:26 13.5       166
Positions are for J2000

Event circumstances last updated at 2023/11/06 05:21:07 UT

Marc W. Buie, Southwest Research Institute

RECON