RECON: TNO occultation with 136204

Event between (136204) 03WL7 and star GA0940:03615801 with event index number of 2039354

Geocentric closest approach at 2027/12/04 12:25:41 UTC

J2000 position of star is 11:43:08.6 +04:36:55
Equinox of date position of star is 11:44:23.6 +04:28:49
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 149 degrees from the moon. Moon is 34% illuminated.
Apparent brightness V=21.9

[RECON map]
Object is 19.3 AU from the Sun and 19.5 AU from the Earth.
Apparent velocity is 12.8 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 125 seconds.
The 1-sigma cross-track error in the shadow position is 1421 km.
The sky-plane scale is 14146.5 km/arcsec.

The object has an absolute magnitude Hv=8.7
Diameter=110.2 km assuming a 5% albedo -- 8.5 sec chord
Diameter=45.0 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 136204, (2027/12/04 12:26UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:51.5 +11:49:47  1.3 24.55 173
Denebola       11:50:29.1 +14:24:58  2.1 10.06 149
3Nu Vir        11:47:17.7 +06:22:23  4.0  2.03 149
PPM 158119     11:43:33.1 +04:35:33  7.7  0.29 149
PPM 158142     11:44:48.0 +04:13:40  9.8  0.24 149
136204         11:44:34.7 +04:27:37 15.7       149
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 26.8 km RECON observability=1.0 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 12:21:19 -22.3 Dark Down 38.8 149.6 Up 12:10:22 - 12:32:15 7395
Kamloops 12:20:15 -31.4 Dark Down 34.1 132.2 Up 12:09:19 - 12:31:12 6965
Kelowna 12:20:17 -30.8 Dark Down 35.0 132.8 Up 12:09:20 - 12:31:13 6909
Peachland 12:20:16 -31.0 Dark Down 35.0 132.4 Up 12:09:20 - 12:31:13 6893
Summerland 12:20:17 -30.9 Dark Down 35.1 132.4 Up 12:09:20 - 12:31:13 6881
Penticton 12:20:17 -30.9 Dark Down 35.2 132.5 Up 12:09:20 - 12:31:13 6877
Oliver 12:20:16 -30.9 Dark Down 35.4 132.3 Up 12:09:20 - 12:31:13 6845
Anarchist Mountain Observatory 12:20:17 -30.8 Dark Down 35.7 132.4 Up 12:09:20 - 12:31:13 6833
Okanogan 12:20:13 -30.9 Dark Down 36.0 131.8 Up 12:09:17 - 12:31:10 6769
Brewster 12:20:13 -31.1 Dark Down 36.1 131.5 Up 12:09:17 - 12:31:10 6740
Manson/Chelan 12:20:12 -31.3 Dark Down 36.0 131.0 Up 12:09:15 - 12:31:08 6713
Victoria 12:19:59 -33.5 Dark Down 33.9 127.9 Up 12:09:03 - 12:30:56 6709
Wenatchee 12:20:08 -31.4 Dark Down 36.2 130.5 Up 12:09:12 - 12:31:05 6665
Ellensburg 12:20:06 -31.6 Dark Down 36.4 130.0 Up 12:09:10 - 12:31:03 6622
Yakima 12:20:09 -31.6 Dark Down 36.6 129.8 Up 12:09:13 - 12:31:06 6583
Toppenish/White Swan 12:20:09 -31.5 Dark Down 36.9 129.8 Up 12:09:13 - 12:31:06 6566
PNWRO 12:20:13 -30.4 Dark Down 37.9 131.2 Up 12:09:17 - 12:31:10 6563
The Dalles 12:20:03 -32.1 Dark Down 36.9 128.5 Up 12:09:06 - 12:30:59 6476
Maupin 12:20:04 -32.0 Dark Down 37.2 128.4 Up 12:09:07 - 12:31:00 6438
Dunrhomin 12:21:25 -19.6 Dark Down 49.0 144.4 Up 12:10:29 - 12:32:22 6373
Nikitin 12:21:25 -19.5 Dark Down 49.1 144.3 Up 12:10:28 - 12:32:21 6355
CU-SBO 12:21:24 -19.6 Dark Down 49.2 144.1 Up 12:10:27 - 12:32:20 6346
Sisters 12:20:01 -32.3 Dark Down 37.5 127.3 Up 12:09:05 - 12:30:58 6343
Bend 12:20:01 -32.1 Dark Down 37.8 127.5 Up 12:09:05 - 12:30:58 6326
Oregon Observatory 12:19:59 -32.2 Dark Down 37.8 127.2 Up 12:09:03 - 12:30:56 6306
Chiloquin 12:19:59 -32.5 Dark Down 38.3 126.0 Up 12:09:02 - 12:30:55 6169
Klamath Falls 12:19:58 -32.5 Dark Down 38.6 125.8 Up 12:09:01 - 12:30:54 6137
Cedarville 12:20:05 -31.2 Dark Down 40.0 127.0 Up 12:09:08 - 12:31:01 6104
Fall River/Burney 12:19:58 -32.1 Dark Down 39.5 125.4 Up 12:09:01 - 12:30:54 6029
Gimple 12:19:59 -31.7 Dark Down 40.4 125.4 Up 12:09:03 - 12:30:56 5950
Greenville 12:19:59 -31.7 Dark Down 40.3 125.3 Up 12:09:03 - 12:30:56 5949
Quincy 12:20:00 -31.7 Dark Down 40.4 125.1 Up 12:09:04 - 12:30:57 5929
Portola 12:20:04 -31.3 Dark Down 40.8 125.6 Up 12:09:08 - 12:31:01 5927
Reno 12:20:06 -30.8 Dark Down 41.4 126.0 Up 12:09:10 - 12:31:03 5916
Carson City 12:20:05 -30.8 Dark Down 41.6 125.8 Up 12:09:08 - 12:31:01 5880
Yerington 12:20:09 -30.2 Dark Down 42.1 126.3 Up 12:09:13 - 12:31:06 5876
Gardnerville 12:20:05 -30.7 Dark Down 41.8 125.7 Up 12:09:08 - 12:31:01 5857
Hawthorne 12:20:13 -29.8 Dark Down 42.8 126.6 Up 12:09:17 - 12:31:10 5843
Lee Vining 12:20:10 -30.1 Dark Down 42.8 125.6 Up 12:09:13 - 12:31:06 5774
Bishop 12:20:13 -29.5 Dark Down 43.6 125.9 Up 12:09:17 - 12:31:10 5732
Beatty 12:20:21 -28.1 Dark Down 44.9 127.4 Up 12:09:24 - 12:31:17 5727
Patrick 12:20:37 -25.5 Dark Down 47.7 129.5 Up 12:09:41 - 12:31:34 5655
Laughlin/Bullhead City 12:20:34 -26.0 Dark Down 47.4 128.4 Up 12:09:37 - 12:31:30 5611
Lake Havasu City 12:20:35 -25.7 Dark Down 48.0 128.1 Up 12:09:39 - 12:31:32 5550
George/Scottsdale 12:20:50 -23.5 Dark Down 50.1 130.4 Up 12:09:54 - 12:31:47 5542
Idyllwild 12:20:23 -27.6 Dark Down 46.8 124.8 Up 12:09:27 - 12:31:20 5408
Wildwood 12:20:13 -29.2 Dark Down 45.3 123.1 Up 12:09:16 - 12:31:09 5395
Calipatria 12:20:30 -26.5 Dark Down 48.0 125.6 Up 12:09:33 - 12:31:26 5378
Yuma 12:20:35 -25.6 Dark Down 48.9 126.2 Up 12:09:38 - 12:31:31 5359

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 136204, (2027/12/04 12:26UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 24.55 173
Denebola       11:49:02.8 +14:34:17  2.1 10.06 149
3Nu Vir        11:45:51.5 +06:31:41  4.0  2.03 149
PPM 158119     11:42:07.0 +04:44:51  7.7  0.29 149
PPM 158142     11:43:21.9 +04:22:59  9.8  0.24 149
136204         11:43:08.6 +04:36:55 15.7       149
Positions are for J2000

Event circumstances last updated at 2024/04/23 03:32:25 UT

Marc W. Buie, Southwest Research Institute

RECON