RECON: TNO occultation with 136204

Event between (136204) 03WL7 and star GA1100:03237434 with event index number of 2039235

Geocentric closest approach at 2022/01/31 09:33:06 UTC

J2000 position of star is 10:00:06.4 +20:27:56
Equinox of date position of star is 10:01:18.9 +20:21:37
Stellar brightness G=14.0, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 155 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=21.0

[RECON map]
TNO is 17.2 AU from the Sun and 16.2 AU from the Earth.
The TNO is moving 21.9 km/sec on the sky relative to the star, or, 6.7 arcsec/hr.
The 1-sigma error in the time of the event is 55 seconds.
The 1-sigma cross-track error in the shadow position is 921 km.
The sky-plane scale is 11759.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.7
Diameter=107.7 km assuming a 5% albedo -- 4.9 sec chord
Diameter=43.9 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 136204, (2022/01/31 09:33UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:32.8 +11:51:30  1.3  8.73 150
PPM 100044     10:04:02.6 +21:50:30  5.4  1.61 155
PPM 099985     09:58:56.2 +20:03:52  8.3  0.63 155
PPM 100002     10:00:25.3 +20:18:29  9.3  0.22 155
136204         10:01:19.8 +20:21:32 14.0       155
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 21.5 km RECON observability=1.0 and success probability=43.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 09:33:42 -53.1 Dark Down 60.0 188.8 Up 09:28:38 - 09:38:47 1000
Kelowna 09:33:42 -53.5 Dark Down 60.4 188.6 Up 09:28:38 - 09:38:47 961
Peachland 09:33:43 -53.7 Dark Down 60.5 188.1 Up 09:28:38 - 09:38:47 943
Summerland 09:33:42 -53.8 Dark Down 60.7 188.3 Up 09:28:38 - 09:38:47 933
Penticton 09:33:42 -53.8 Dark Down 60.7 188.5 Up 09:28:37 - 09:38:46 930
Oliver 09:33:41 -54.1 Dark Down 61.1 188.6 Up 09:28:37 - 09:38:46 898
Anarchist Mountain Observatory 09:33:40 -54.2 Dark Down 61.2 189.0 Up 09:28:36 - 09:38:45 888
Tonasket 09:33:40 -54.4 Dark Down 61.5 189.0 Up 09:28:35 - 09:38:44 858
Okanogan 09:33:40 -54.8 Dark Down 61.9 188.8 Up 09:28:35 - 09:38:44 824
Brewster 09:33:40 -55.1 Dark Down 62.2 188.4 Up 09:28:35 - 09:38:44 794
Manson/Chelan 09:33:41 -55.4 Dark Down 62.4 187.8 Up 09:28:36 - 09:38:45 765
Victoria 09:33:52 -56.0 Dark Down 61.9 181.2 Up 09:28:48 - 09:38:57 739
Wenatchee 09:33:40 -55.8 Dark Down 62.9 187.5 Up 09:28:36 - 09:38:45 717
Ellensburg 09:33:40 -56.3 Dark Down 63.3 187.2 Up 09:28:36 - 09:38:45 673
Pasco 09:33:35 -56.3 Dark Down 63.9 190.4 Up 09:28:30 - 09:38:39 644
Yakima 09:33:40 -56.6 Dark Down 63.7 187.2 Up 09:28:35 - 09:38:44 635
PNWRO 09:33:34 -56.4 Dark Down 64.1 190.9 Up 09:28:29 - 09:38:38 628
Toppenish/White Swan 09:33:39 -56.7 Dark Down 63.9 187.7 Up 09:28:35 - 09:38:44 620
Goldendale 09:33:40 -57.3 Dark Down 64.5 186.9 Up 09:28:35 - 09:38:44 557
Dunrhomin 09:32:36 -52.4 Dark Down 64.7 224.1 Up 09:27:31 - 09:37:40 547
The Dalles 09:33:40 -57.7 Dark Down 64.8 186.2 Up 09:28:36 - 09:38:45 526
Maupin 09:33:39 -58.0 Dark Down 65.2 186.5 Up 09:28:35 - 09:38:44 490
Redmond 09:33:38 -58.7 Dark Down 66.1 186.5 Up 09:28:34 - 09:38:43 402
Sisters 09:33:39 -58.9 Dark Down 66.1 185.6 Up 09:28:35 - 09:38:44 393
Bend 09:33:38 -59.0 Dark Down 66.3 186.2 Up 09:28:34 - 09:38:43 378
Oregon Observatory 09:33:38 -59.2 Dark Down 66.5 185.9 Up 09:28:34 - 09:38:43 358
La Pine/Gilchrist 09:33:38 -59.3 Dark Down 66.7 185.9 Up 09:28:34 - 09:38:43 337
North Lake 09:33:35 -59.4 Dark Down 67.1 187.4 Up 09:28:31 - 09:38:40 313
Paisley 09:33:33 -59.7 Dark Down 67.6 188.4 Up 09:28:29 - 09:38:38 271
Lakeview 09:33:32 -60.0 Dark Down 68.1 189.1 Up 09:28:27 - 09:38:36 228
Chiloquin 09:33:37 -60.4 Dark Down 67.8 185.2 Up 09:28:33 - 09:38:42 220
Klamath Falls 09:33:37 -60.6 Dark Down 68.2 185.5 Up 09:28:32 - 09:38:41 190
Cedarville 09:33:30 -60.4 Dark Down 68.7 189.8 Up 09:28:25 - 09:38:34 170
Fall River/Burney 09:33:33 -61.4 Dark Down 69.3 186.8 Up 09:28:29 - 09:38:38 87
Susanville 09:33:30 -61.5 Dark Down 69.9 189.0 Up 09:28:25 - 09:38:34 48
Gimple 09:33:30 -61.8 Dark Down 70.2 188.5 Up 09:28:25 - 09:38:34 15
Greenville 09:33:30 -61.9 Dark Down 70.2 188.3 Up 09:28:26 - 09:38:35 13
Portola 09:33:28 -61.9 Dark Down 70.4 189.7 Up 09:28:23 - 09:38:32 -5
Quincy 09:33:30 -62.0 Dark Down 70.4 188.4 Up 09:28:25 - 09:38:34 -7
Reno 09:33:25 -61.7 Dark Down 70.6 191.6 Up 09:28:20 - 09:38:29 -11
Yerington 09:33:22 -61.8 Dark Down 71.0 193.8 Up 09:28:17 - 09:38:26 -44
Carson City 09:33:24 -62.0 Dark Down 70.9 191.9 Up 09:28:20 - 09:38:29 -45
Gardnerville 09:33:24 -62.1 Dark Down 71.2 192.2 Up 09:28:19 - 09:38:28 -67
Tonopah 09:33:13 -61.3 Dark Down 71.5 200.0 Up 09:28:08 - 09:38:17 -72
Hawthorne 09:33:19 -61.8 Dark Down 71.4 195.6 Up 09:28:14 - 09:38:23 -72
Lee Vining 09:33:20 -62.4 Dark Down 72.0 194.6 Up 09:28:15 - 09:38:24 -143
Indian Springs 09:33:04 -61.2 Dark Down 72.4 206.1 Up 09:28:00 - 09:38:09 -165
Beatty 09:33:09 -61.7 Dark Down 72.4 202.6 Up 09:28:04 - 09:38:13 -170
Bishop 09:33:16 -62.4 Dark Down 72.4 197.3 Up 09:28:11 - 09:38:20 -178
Henderson 09:33:01 -61.1 Dark Down 72.6 208.8 Up 09:27:56 - 09:38:05 -194
Patrick 09:32:55 -60.7 Dark Down 72.7 212.9 Up 09:27:51 - 09:38:00 -215
Kingman/Dolan Springs 09:32:55 -60.9 Dark Down 73.0 212.8 Up 09:27:51 - 09:38:00 -244
Laughlin/Bullhead City 09:32:57 -61.3 Dark Down 73.2 211.3 Up 09:27:53 - 09:38:02 -264
Mohave Valley 09:32:57 -61.4 Dark Down 73.4 211.8 Up 09:27:52 - 09:38:01 -291
George/Scottsdale 09:32:44 -60.1 Dark Down 73.1 221.5 Up 09:27:40 - 09:37:49 -308
Lake Havasu City 09:32:55 -61.5 Dark Down 73.7 213.3 Up 09:27:50 - 09:37:59 -321
Parker 09:32:54 -61.6 Dark Down 73.9 214.0 Up 09:27:50 - 09:37:59 -354
Blythe 09:32:54 -62.1 Dark Down 74.5 214.2 Up 09:27:50 - 09:37:59 -416
CPSLO 09:33:20 -65.1 Dark Down 74.9 191.7 Up 09:28:16 - 09:38:25 -455
Idyllwild 09:33:02 -63.5 Dark Down 75.3 207.2 Up 09:27:58 - 09:38:07 -479
Calipatria 09:32:57 -63.0 Dark Down 75.4 212.2 Up 09:27:52 - 09:38:01 -498
Wildwood 09:33:11 -64.6 Dark Down 75.6 200.2 Up 09:28:06 - 09:38:15 -508
Yuma 09:32:53 -62.6 Dark Down 75.3 216.0 Up 09:27:48 - 09:37:57 -509

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, (2022/01/31 09:33UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3  8.73 150
PPM 100044     10:02:48.9 +21:56:57  5.4  1.61 155
PPM 099985     09:57:42.8 +20:10:14  8.3  0.63 155
PPM 100002     09:59:11.9 +20:24:52  9.3  0.22 155
136204         10:00:06.4 +20:27:56 14.0       155
Positions are for J2000

Event circumstances last updated at 2021/10/27 22:39:48 UT

Marc W. Buie, Southwest Research Institute

RECON