RECON: TNO occultation with 136204

Event between (136204) 03WL7 and star GA0960:03713674 with event index number of 2039337

Geocentric closest approach at 2027/03/20 03:51:38 UTC

J2000 position of star is 11:20:43.2 +07:50:24
Equinox of date position of star is 11:21:58.7 +07:42:23
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 19 degrees from the moon. Moon is 93% illuminated.
Apparent brightness V=21.5

[RECON map]
Object is 19.0 AU from the Sun and 18.1 AU from the Earth.
Apparent velocity is 22.8 km/sec on the sky relative to the star, or, 6.3 arcsec/hr.
The 1-sigma error in the time of the event is 61 seconds.
The 1-sigma cross-track error in the shadow position is 1081 km.
The sky-plane scale is 13108.1 km/arcsec.

The object has an absolute magnitude Hv=8.7
Diameter=110.2 km assuming a 5% albedo -- 4.8 sec chord
Diameter=45.0 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 136204, (2027/03/20 03:51UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:49.2 +11:49:59  1.3 18.28   2
Denebola       11:50:26.9 +14:25:12  2.1  9.67  26
77Sig Leo      11:22:32.4 +05:52:47  4.0  1.81  20
PPM 157766     11:22:27.0 +06:54:53  8.1  0.78  20
PPM 157777     11:23:04.0 +07:04:23  8.6  0.66  20
PPM 157778     11:23:06.5 +07:41:12 10.4  0.24  20
136204         11:22:07.7 +07:41:26 16.1        20
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 33.9 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)
Sleaford 03:54:28 -23.9 Dark Up 35.0 128.9 Up 03:48:55 - 04:00:02 6943
Kamloops 03:55:00 -16.6 AT Up 28.1 114.1 Low 03:49:27 - 04:00:34 6684
Kelowna 03:55:00 -17.5 AT Up 29.0 114.5 Low 03:49:26 - 04:00:33 6611
Peachland 03:55:01 -17.3 AT Up 28.9 114.2 Low 03:49:28 - 04:00:35 6599
Summerland 03:55:01 -17.4 AT Up 29.0 114.2 Low 03:49:27 - 04:00:34 6585
Penticton 03:55:00 -17.5 AT Up 29.1 114.3 Low 03:49:27 - 04:00:34 6579
Oliver 03:55:01 -17.7 AT Up 29.2 114.1 Low 03:49:28 - 04:00:35 6545
Anarchist Mountain Observatory 03:55:01 -17.8 AT Up 29.4 114.2 Low 03:49:28 - 04:00:35 6530
Okanogan 03:55:03 -17.9 AT Up 29.5 113.7 Low 03:49:29 - 04:00:36 6466
Victoria 03:55:09 -15.5 AT Up 27.1 110.4 Low 03:49:36 - 04:00:43 6459
Brewster 03:55:03 -17.9 AT Up 29.5 113.4 Low 03:49:29 - 04:00:36 6438
Manson/Chelan 03:55:04 -17.7 AT Up 29.4 112.9 Low 03:49:31 - 04:00:38 6416
Wenatchee 03:55:06 -17.8 AT Up 29.5 112.5 Low 03:49:32 - 04:00:39 6368
Ellensburg 03:55:06 -17.8 AT Up 29.5 112.1 Low 03:49:33 - 04:00:40 6326
Yakima 03:55:08 -17.9 AT Up 29.6 111.9 Low 03:49:34 - 04:00:41 6285
Toppenish/White Swan 03:55:08 -18.1 Dark Up 29.8 111.9 Low 03:49:34 - 04:00:41 6265
PNWRO 03:55:05 -19.2 Dark Up 30.9 113.0 Up 03:49:32 - 04:00:39 6239
The Dalles 03:55:10 -17.9 AT Up 29.6 110.8 Low 03:49:36 - 04:00:43 6182
Maupin 03:55:10 -18.1 Dark Up 29.8 110.7 Low 03:49:37 - 04:00:44 6141
Sisters 03:55:12 -18.0 Dark Up 29.8 109.8 Low 03:49:39 - 04:00:46 6050
Bend 03:55:12 -18.3 Dark Up 30.1 109.9 Up 03:49:39 - 04:00:46 6027
Oregon Observatory 03:55:13 -18.2 Dark Up 30.0 109.7 Up 03:49:39 - 04:00:46 6009
Chiloquin 03:55:16 -18.4 Dark Up 30.2 108.7 Up 03:49:42 - 04:00:49 5872
Klamath Falls 03:55:16 -18.5 Dark Up 30.3 108.5 Up 03:49:43 - 04:00:50 5837
Dunrhomin 03:54:37 -30.6 Dark Up 42.4 122.0 Up 03:49:04 - 04:00:11 5811
Nikitin 03:54:38 -30.7 Dark Up 42.5 121.9 Up 03:49:04 - 04:00:11 5792
CU-SBO 03:54:37 -30.7 Dark Up 42.4 121.7 Up 03:49:04 - 04:00:11 5785
Cedarville 03:55:13 -19.9 Dark Up 31.7 109.4 Up 03:49:40 - 04:00:47 5777
Fall River/Burney 03:55:16 -19.1 Dark Up 31.0 108.2 Up 03:49:43 - 04:00:50 5719
Gimple 03:55:16 -19.8 Dark Up 31.7 108.1 Up 03:49:43 - 04:00:50 5628
Greenville 03:55:16 -19.7 Dark Up 31.6 108.0 Up 03:49:43 - 04:00:50 5628
Quincy 03:55:18 -19.8 Dark Up 31.7 107.9 Up 03:49:44 - 04:00:51 5607
Portola 03:55:17 -20.2 Dark Up 32.1 108.2 Up 03:49:43 - 04:00:50 5597
Reno 03:55:15 -20.7 Dark Up 32.6 108.6 Up 03:49:42 - 04:00:49 5574
Carson City 03:55:16 -20.9 Dark Up 32.7 108.4 Up 03:49:42 - 04:00:49 5537
Yerington 03:55:14 -21.4 Dark Up 33.3 108.7 Up 03:49:40 - 04:00:47 5522
Gardnerville 03:55:16 -21.0 Dark Up 32.8 108.2 Up 03:49:42 - 04:00:49 5512
Hawthorne 03:55:13 -21.9 Dark Up 33.8 108.9 Up 03:49:39 - 04:00:46 5478
Lee Vining 03:55:15 -21.7 Dark Up 33.6 108.1 Up 03:49:42 - 04:00:49 5414
Bishop 03:55:14 -22.5 Dark Up 34.3 108.3 Up 03:49:40 - 04:00:47 5357
Beatty 03:55:10 -23.8 Dark Up 35.7 109.3 Up 03:49:36 - 04:00:43 5324
Patrick 03:55:04 -26.5 Dark Up 38.4 110.5 Up 03:49:31 - 04:00:38 5196
Laughlin/Bullhead City 03:55:06 -26.1 Dark Up 38.0 109.8 Up 03:49:33 - 04:00:40 5163
Lake Havasu City 03:55:06 -26.5 Dark Up 38.4 109.5 Up 03:49:33 - 04:00:40 5094
George/Scottsdale 03:55:00 -28.7 Dark Up 40.5 110.8 Up 03:49:26 - 04:00:33 5040
Wildwood 03:55:17 -23.3 Dark Up 35.2 106.0 Up 03:49:43 - 04:00:50 5008
Idyllwild 03:55:12 -24.9 Dark Up 36.8 107.1 Up 03:49:39 - 04:00:46 4988
Calipatria 03:55:09 -26.0 Dark Up 37.9 107.5 Up 03:49:35 - 04:00:42 4935
Yuma 03:55:07 -26.8 Dark Up 38.7 107.9 Up 03:49:34 - 04:00:41 4898

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, (2027/03/20 03:51UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 18.28   2
Denebola       11:49:02.8 +14:34:17  2.1  9.67  26
77Sig Leo      11:21:08.1 +06:01:45  4.0  1.81  20
PPM 157766     11:21:02.6 +07:03:51  8.1  0.78  20
PPM 157777     11:21:39.5 +07:13:22  8.6  0.66  20
PPM 157778     11:21:42.0 +07:50:10 10.4  0.24  20
136204         11:20:43.2 +07:50:24 16.1        19
Positions are for J2000

Event circumstances last updated at 2024/04/23 03:26:51 UT

Marc W. Buie, Southwest Research Institute

RECON