RECON: TNO occultation with 612141

Event between (612141) 99XY143 and star GA1080:02810372 with event index number of 2806106

Geocentric closest approach at 2023/11/24 11:38:19 UTC

J2000 position of star is 07:10:31.2 +18:43:33
Equinox of date position of star is 07:11:49.5 +18:41:16
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 82 degrees from the moon. Moon is 90% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 45.1 AU from the Sun and 44.4 AU from the Earth.
The TNO is moving 17.3 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 664 seconds.
The 1-sigma cross-track error in the shadow position is 3724 km.
The sky-plane scale is 32206.1 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=348.3 km assuming a 5% albedo -- 20.1 sec chord
Diameter=142.2 km assuming a 30% albedo -- 8.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 612141, (2023/11/24 11:38UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:46.6 +27:57:59  1.1 12.25  88
Alhena         06:39:05.5 +16:22:37  1.9  8.16  74
51 Gem         07:14:44.5 +16:06:59  5.0  2.66  83
PPM 123630     07:11:19.4 +18:48:13  7.6  0.18  82
612141         07:11:55.0 +18:41:06 15.4        82
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 1.4 sigma about the mid-time.
The median site spacing is 28.7 km RECON observability=1.0 and success probability=13.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 11:36:52 -27.3 Dark Down 51.8 218.2 Up 11:21:52 - 11:51:52 -1684
Kamloops 11:37:45 -36.2 Dark Up 57.2 197.0 Up 11:22:45 - 11:52:45 -1921
Kelowna 11:37:41 -35.8 Dark Up 57.8 198.9 Up 11:22:41 - 11:52:41 -1993
Peachland 11:37:42 -36.0 Dark Up 57.9 198.4 Up 11:22:42 - 11:52:42 -2004
Summerland 11:37:41 -36.0 Dark Up 58.0 198.7 Up 11:22:41 - 11:52:41 -2018
Penticton 11:37:41 -35.9 Dark Up 58.1 198.9 Up 11:22:41 - 11:52:41 -2024
Oliver 11:37:40 -36.0 Dark Up 58.4 199.1 Up 11:22:40 - 11:52:40 -2057
Anarchist Mountain Observatory 11:37:39 -35.9 Dark Up 58.5 199.5 Up 11:22:39 - 11:52:39 -2072
Tonasket 11:37:40 -36.0 Dark Up 58.8 199.5 Up 11:22:40 - 11:52:40 -2103
Okanogan 11:37:40 -36.2 Dark Up 59.2 199.5 Up 11:22:40 - 11:52:40 -2136
Victoria 11:37:56 -38.6 Dark Up 59.7 192.5 Up 11:22:56 - 11:52:56 -2138
Brewster 11:37:40 -36.4 Dark Up 59.5 199.2 Up 11:22:40 - 11:52:40 -2163
Manson/Chelan 11:37:42 -36.6 Dark Up 59.8 198.7 Up 11:22:42 - 11:52:42 -2185
Wenatchee 11:37:42 -36.8 Dark Up 60.3 198.6 Up 11:22:42 - 11:52:42 -2232
Ellensburg 11:37:43 -37.0 Dark Up 60.7 198.5 Up 11:22:43 - 11:52:43 -2273
Yakima 11:37:42 -37.1 Dark Up 61.1 198.7 Up 11:22:42 - 11:52:42 -2313
Toppenish/White Swan 11:37:42 -37.0 Dark Up 61.2 199.1 Up 11:22:42 - 11:52:42 -2333
PNWRO 11:37:35 -36.1 Dark Up 61.2 202.2 Up 11:22:35 - 11:52:35 -2361
Goldendale 11:37:43 -37.4 Dark Up 61.9 198.6 Up 11:22:43 - 11:52:43 -2389
The Dalles 11:37:45 -37.7 Dark Up 62.2 198.1 Up 11:22:45 - 11:52:45 -2413
Maupin 11:37:43 -37.7 Dark Up 62.5 198.5 Up 11:22:43 - 11:52:43 -2454
Sisters 11:37:45 -38.2 Dark Up 63.5 198.1 Up 11:22:45 - 11:52:45 -2544
Bend 11:37:44 -38.0 Dark Up 63.6 198.7 Up 11:22:44 - 11:52:44 -2566
Oregon Observatory 11:37:45 -38.1 Dark Up 63.8 198.6 Up 11:22:45 - 11:52:45 -2584
North Lake 11:37:41 -37.8 Dark Up 64.3 200.1 Up 11:22:41 - 11:52:41 -2646
Chiloquin 11:37:46 -38.6 Dark Up 65.2 198.6 Up 11:22:46 - 11:52:46 -2719
Lakeview 11:37:38 -37.5 Dark Up 65.2 202.1 Up 11:22:38 - 11:52:38 -2749
Klamath Falls 11:37:44 -38.6 Dark Up 65.5 199.0 Up 11:22:44 - 11:52:44 -2753
Dunrhomin 11:36:27 -26.4 Dark Down 59.9 231.5 Up 11:21:27 - 11:51:27 -2808
Cedarville 11:37:37 -37.5 Dark Up 65.7 203.0 Up 11:22:37 - 11:52:37 -2815
CU-SBO 11:36:27 -26.4 Dark Down 60.1 231.7 Up 11:21:27 - 11:51:27 -2835
Fall River/Burney 11:37:42 -38.4 Dark Up 66.5 200.7 Up 11:22:42 - 11:52:42 -2871
Susanville 11:37:38 -37.9 Dark Up 66.9 202.9 Up 11:22:38 - 11:52:38 -2932
Gimple 11:37:39 -38.1 Dark Up 67.2 202.7 Up 11:22:39 - 11:52:39 -2962
Greenville 11:37:40 -38.2 Dark Up 67.2 202.5 Up 11:22:40 - 11:52:40 -2962
Quincy 11:37:39 -38.2 Dark Up 67.4 202.7 Up 11:22:39 - 11:52:39 -2983
Portola 11:37:36 -37.8 Dark Up 67.4 203.9 Up 11:22:36 - 11:52:36 -2993
Reno 11:37:33 -37.4 Dark Up 67.4 205.7 Up 11:22:33 - 11:52:33 -3017
Carson City 11:37:33 -37.4 Dark Up 67.7 206.1 Up 11:22:33 - 11:52:33 -3054
Yerington 11:37:30 -36.9 Dark Up 67.7 207.8 Up 11:22:30 - 11:52:30 -3070
Gardnerville 11:37:33 -37.3 Dark Up 67.9 206.5 Up 11:22:33 - 11:52:33 -3079
Hawthorne 11:37:27 -36.5 Dark Up 67.9 209.5 Up 11:22:27 - 11:52:27 -3114
Tonopah 11:37:20 -35.4 Dark Up 67.7 213.2 Up 11:22:20 - 11:52:20 -3153
Lee Vining 11:37:29 -36.9 Dark Up 68.6 209.1 Up 11:22:29 - 11:52:29 -3176
Bishop 11:37:25 -36.4 Dark Up 68.8 211.5 Up 11:22:25 - 11:52:25 -3234
Beatty 11:37:17 -35.1 Dark Down 68.5 215.9 Up 11:22:17 - 11:52:17 -3270
Indian Springs 11:37:11 -34.2 Dark Down 68.2 218.7 Up 11:22:11 - 11:52:11 -3296
Henderson 11:37:07 -33.7 Dark Down 68.3 221.0 Up 11:22:07 - 11:52:07 -3346
Patrick 11:37:01 -32.7 Dark Down 68.2 224.3 Up 11:22:01 - 11:52:01 -3402
Kingman/Dolan Springs 11:37:02 -32.9 Dark Down 68.4 224.4 Up 11:22:02 - 11:52:02 -3427
Laughlin/Bullhead City 11:37:05 -33.3 Dark Down 68.7 223.3 Up 11:22:05 - 11:52:05 -3435
Mohave Valley 11:37:04 -33.3 Dark Down 68.9 223.8 Up 11:22:04 - 11:52:04 -3463
Lake Havasu City 11:37:02 -33.1 Dark Down 69.1 225.1 Up 11:22:02 - 11:52:02 -3503
Parker 11:37:02 -33.0 Dark Down 69.3 225.8 Up 11:22:02 - 11:52:02 -3540
George/Scottsdale 11:36:49 -31.0 Dark Down 68.1 231.3 Up 11:21:49 - 11:51:49 -3562
Wildwood 11:37:24 -36.5 Dark Up 71.6 216.1 Up 11:22:24 - 11:52:24 -3581
Idyllwild 11:37:13 -35.0 Dark Down 71.0 221.3 Up 11:22:13 - 11:52:13 -3604
Calipatria 11:37:07 -34.0 Dark Down 70.7 225.2 Up 11:22:07 - 11:52:07 -3660
Yuma 11:37:02 -33.2 Dark Down 70.5 228.0 Up 11:22:02 - 11:52:02 -3698

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 612141, (2023/11/24 11:38UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 12.25  88
Alhena         06:37:42.8 +16:23:56  1.9  8.16  74
51 Gem         07:13:22.3 +16:09:31  5.0  2.66  83
PPM 123630     07:09:55.6 +18:50:38  7.6  0.18  82
612141         07:10:31.2 +18:43:33 15.4        82
Positions are for J2000

Event circumstances last updated at 2022/05/03 01:34:50 UT

Marc W. Buie, Southwest Research Institute

RECON