RECON: TNO occultation with 20YR3

Event between 20YR3 and star GA1160:00687119 with event index number of 2179479

Geocentric closest approach at 2024/11/26 03:25:22 UTC

J2000 position of star is 04:09:16.0 +27:01:24
Equinox of date position of star is 04:10:44.4 +27:05:06
Stellar brightness G=13.4, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 122 degrees from the moon. Moon is 22% illuminated.
Apparent brightness V=21.4

[RECON map]
Object is 16.5 AU from the Sun and 15.6 AU from the Earth.
Apparent velocity is 40.3 km/sec on the sky relative to the star, or, 12.9 arcsec/hr.
The 1-sigma error in the time of the event is 27 seconds.
The 1-sigma cross-track error in the shadow position is 896 km.
The sky-plane scale is 11280.1 km/arcsec.

The object has an absolute magnitude Hv=9.3
Diameter=83.9 km assuming a 5% albedo -- 2.1 sec chord
Diameter=34.3 km assuming a 30% albedo -- 0.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 20YR3, (2024/11/26 03:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.1 +16:33:27  0.8 12.19 118
44Zet Per      03:55:42.2 +31:57:20  2.8  5.87 124
44 Tau         04:12:21.2 +26:32:38  5.4  0.65 122
PPM 093246     04:07:35.5 +26:16:38  7.9  1.08 123
PPM 093287     04:10:39.1 +27:10:49  9.3  0.10 122
20YR3          04:10:47.7 +27:05:14 13.4       122
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 21.8 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 03:26:33 -31.5 Dark Down 35.9 89.9 Up 03:23:50 - 03:29:15 6647
Victoria 03:26:39 -29.6 Dark Down 33.8 86.1 Up 03:23:56 - 03:29:21 6627
Peachland 03:26:34 -31.9 Dark Down 36.2 89.6 Up 03:23:52 - 03:29:17 6570
Kelowna 03:26:34 -32.1 Dark Down 36.4 90.0 Up 03:23:51 - 03:29:16 6566
Summerland 03:26:34 -32.0 Dark Down 36.3 89.6 Up 03:23:52 - 03:29:17 6557
Penticton 03:26:35 -32.1 Dark Down 36.4 89.6 Up 03:23:52 - 03:29:17 6549
Oliver 03:26:36 -32.1 Dark Down 36.4 89.4 Up 03:23:53 - 03:29:18 6527
Anarchist Mountain Observatory 03:26:36 -32.3 Dark Down 36.5 89.4 Up 03:23:53 - 03:29:18 6510
Okanogan 03:26:38 -32.2 Dark Down 36.3 88.8 Up 03:23:55 - 03:29:20 6477
Manson/Chelan 03:26:39 -31.8 Dark Down 36.0 88.0 Up 03:23:57 - 03:29:22 6468
Brewster 03:26:38 -32.1 Dark Down 36.2 88.4 Up 03:23:56 - 03:29:21 6467
Wenatchee 03:26:40 -31.7 Dark Down 35.8 87.5 Up 03:23:57 - 03:29:22 6444
Ellensburg 03:26:41 -31.6 Dark Down 35.7 87.1 Up 03:23:59 - 03:29:24 6426
Yakima 03:26:42 -31.6 Dark Down 35.6 86.8 Up 03:24:00 - 03:29:25 6400
Toppenish/White Swan 03:26:43 -31.8 Dark Down 35.7 86.8 Up 03:24:00 - 03:29:25 6379
The Dalles 03:26:45 -31.2 Dark Down 35.1 85.7 Up 03:24:02 - 03:29:27 6359
Maupin 03:26:46 -31.3 Dark Down 35.2 85.5 Up 03:24:03 - 03:29:28 6327
PNWRO 03:26:42 -32.8 Dark Down 36.8 87.5 Up 03:24:00 - 03:29:25 6298
Sisters 03:26:47 -31.0 Dark Down 34.8 84.5 Up 03:24:05 - 03:29:30 6288
Bend 03:26:48 -31.2 Dark Down 34.9 84.5 Up 03:24:06 - 03:29:31 6262
Oregon Observatory 03:26:48 -31.1 Dark Down 34.8 84.3 Up 03:24:06 - 03:29:31 6256
Sleaford 03:26:19 -40.0 Dark Down 44.6 103.2 Up 03:23:36 - 03:29:01 6243
Chiloquin 03:26:52 -30.8 Dark Down 34.4 83.2 Up 03:24:09 - 03:29:34 6182
Klamath Falls 03:26:52 -30.8 Dark Down 34.4 83.0 Up 03:24:10 - 03:29:35 6155
Fall River/Burney 03:26:54 -31.1 Dark Down 34.5 82.4 Up 03:24:12 - 03:29:37 6057
Cedarville 03:26:53 -32.0 Dark Down 35.5 83.5 Up 03:24:10 - 03:29:35 6041
Greenville 03:26:56 -31.4 Dark Down 34.8 82.1 Up 03:24:14 - 03:29:39 5973
Gimple 03:26:56 -31.5 Dark Down 34.8 82.1 Up 03:24:14 - 03:29:39 5969
Quincy 03:26:57 -31.4 Dark Down 34.7 81.9 Up 03:24:14 - 03:29:39 5958
Portola 03:26:56 -31.8 Dark Down 35.1 82.1 Up 03:24:14 - 03:29:39 5929
Reno 03:26:57 -32.2 Dark Down 35.5 82.3 Up 03:24:14 - 03:29:39 5882
Carson City 03:26:57 -32.3 Dark Down 35.5 82.0 Up 03:24:15 - 03:29:40 5855
Gardnerville 03:26:58 -32.3 Dark Down 35.5 81.9 Up 03:24:15 - 03:29:40 5835
Yerington 03:26:57 -32.7 Dark Down 36.0 82.3 Up 03:24:15 - 03:29:40 5813
Hawthorne 03:26:58 -33.1 Dark Down 36.3 82.2 Up 03:24:15 - 03:29:40 5755
Lee Vining 03:26:59 -32.7 Dark Down 35.9 81.5 Up 03:24:17 - 03:29:42 5734
Bishop 03:27:00 -33.3 Dark Down 36.3 81.5 Up 03:24:17 - 03:29:42 5656
Beatty 03:27:00 -34.6 Dark Down 37.6 82.0 Up 03:24:17 - 03:29:42 5549
Wildwood 03:27:06 -33.0 Dark Down 35.7 79.1 Up 03:24:24 - 03:29:49 5409
Dunrhomin 03:26:42 -43.4 Dark Down 46.7 91.8 Up 03:23:59 - 03:29:24 5322
Laughlin/Bullhead City 03:27:01 -36.3 Dark Down 39.1 81.7 Up 03:24:18 - 03:29:43 5313
Nikitin 03:26:42 -43.4 Dark Down 46.7 91.6 Up 03:24:00 - 03:29:25 5307
CU-SBO 03:26:42 -43.3 Dark Down 46.7 91.5 Up 03:24:00 - 03:29:25 5305
Patrick 03:27:00 -36.9 Dark Down 39.7 82.3 Up 03:24:17 - 03:29:42 5301
Idyllwild 03:27:06 -34.5 Dark Down 37.1 79.6 Up 03:24:23 - 03:29:48 5294
Lake Havasu City 03:27:02 -36.5 Dark Down 39.2 81.3 Up 03:24:20 - 03:29:45 5247
Calipatria 03:27:06 -35.5 Dark Down 38.0 79.7 Up 03:24:23 - 03:29:48 5189
Yuma 03:27:06 -36.2 Dark Down 38.7 79.7 Up 03:24:23 - 03:29:48 5112
George/Scottsdale 03:27:01 -38.5 Dark Down 41.1 81.8 Up 03:24:18 - 03:29:43 5070

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 20YR3, (2024/11/26 03:28UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 12.19 118
44Zet Per      03:54:07.9 +31:53:01  2.8  5.87 124
44 Tau         04:10:49.8 +26:28:51  5.4  0.65 122
PPM 093246     04:06:04.5 +26:12:42  7.9  1.08 123
PPM 093287     04:09:07.4 +27:06:58  9.3  0.10 122
20YR3          04:09:16.0 +27:01:24 13.4       122
Positions are for J2000

Event circumstances last updated at 2024/01/09 04:25:22 UT

Marc W. Buie, Southwest Research Institute

RECON