RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:03126021 with event index number of 1242353

Geocentric closest approach at 2022/12/21 06:20:54 UTC

J2000 position of star is 05:48:24.3 +41:35:08
Equinox of date position of star is 05:49:58.9 +41:35:29
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 148 degrees from the moon. Moon is 7% illuminated.
TNO apparent brightness V=23.0

[RECON map]
TNO is 24.4 AU from the Sun and 23.5 AU from the Earth.
The TNO is moving 26.2 km/sec on the sky relative to the star, or, 5.5 arcsec/hr.
The 1-sigma error in the time of the event is 102 seconds.
The 1-sigma cross-track error in the shadow position is 866 km.
The sky-plane scale is 17049.8 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 3.5 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2022/12/21 06:21UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.2 +27:58:08  1.1 27.37 126
34Bet Aur      06:01:12.9 +44:56:50  1.9  3.92 144
PPM 048445     05:48:53.5 +42:31:58  6.3  0.97 147
PPM 048454     05:49:59.0 +42:04:11  8.3  0.48 147
PPM 048448     05:49:06.9 +41:26:34  9.8  0.23 148
8405           05:50:02.1 +41:35:29 15.9       147
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 31.2 km RECON observability=1.0 and success probability=55.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:21:52 -56.9 Dark Down 72.2 112.2 Up 06:12:50 - 06:30:54 520
Sleaford 06:21:14 -60.3 Dark Down 78.2 149.8 Up 06:12:12 - 06:30:16 474
Kelowna 06:21:51 -57.8 Dark Down 73.1 111.1 Up 06:12:49 - 06:30:53 418
Peachland 06:21:51 -57.8 Dark Down 72.9 110.3 Up 06:12:49 - 06:30:53 412
Summerland 06:21:51 -57.9 Dark Down 73.0 110.0 Up 06:12:49 - 06:30:53 394
Penticton 06:21:51 -58.0 Dark Down 73.1 110.0 Up 06:12:49 - 06:30:53 385
Victoria 06:22:02 -56.9 Dark Down 71.0 102.0 Up 06:13:00 - 06:31:04 359
Oliver 06:21:52 -58.3 Dark Down 73.2 108.9 Up 06:12:50 - 06:30:54 348
Anarchist Mountain Observatory 06:21:51 -58.5 Dark Down 73.4 108.6 Up 06:12:49 - 06:30:53 326
Tonasket 06:21:52 -58.7 Dark Down 73.5 107.5 Up 06:12:50 - 06:30:54 295
Okanogan 06:21:53 -58.9 Dark Down 73.5 106.2 Up 06:12:51 - 06:30:55 262
Brewster 06:21:54 -59.0 Dark Down 73.4 105.1 Up 06:12:52 - 06:30:56 237
Manson/Chelan 06:21:55 -58.9 Dark Down 73.2 103.9 Up 06:12:53 - 06:30:57 223
Wenatchee 06:21:56 -59.2 Dark Down 73.2 102.2 Up 06:12:54 - 06:30:58 176
Ellensburg 06:21:57 -59.3 Dark Down 73.2 100.6 Up 06:12:55 - 06:30:59 137
Yakima 06:21:58 -59.6 Dark Down 73.2 99.3 Up 06:12:56 - 06:31:00 94
Toppenish/White Swan 06:21:57 -59.8 Dark Down 73.4 98.7 Up 06:12:55 - 06:30:59 67
Goldendale 06:21:59 -60.0 Dark Down 73.2 96.5 Up 06:12:57 - 06:31:01 18
The Dalles 06:22:00 -59.9 Dark Down 72.9 95.4 Up 06:12:58 - 06:31:02 2
PNWRO 06:21:54 -60.8 Dark Down 74.5 99.1 Up 06:12:52 - 06:30:56 -3
Maupin 06:22:01 -60.2 Dark Down 73.1 94.1 Up 06:12:59 - 06:31:03 -45
Sisters 06:22:03 -60.5 Dark Down 72.8 90.9 Up 06:13:01 - 06:31:05 -127
Bend 06:22:03 -60.8 Dark Down 72.9 90.3 Up 06:13:01 - 06:31:05 -158
Oregon Observatory 06:22:03 -60.8 Dark Down 72.8 89.6 Up 06:13:01 - 06:31:05 -174
North Lake 06:22:03 -61.5 Dark Down 73.2 87.9 Up 06:13:01 - 06:31:05 -254
Chiloquin 06:22:06 -61.3 Dark Down 72.5 85.2 Up 06:13:04 - 06:31:08 -304
Klamath Falls 06:22:06 -61.6 Dark Down 72.5 84.1 Up 06:13:04 - 06:31:08 -342
Lakeview 06:22:02 -62.5 Dark Down 73.6 84.6 Up 06:13:00 - 06:31:04 -379
Cedarville 06:22:02 -62.9 Dark Down 73.6 82.5 Up 06:13:00 - 06:31:04 -453
Fall River/Burney 06:22:07 -62.4 Dark Down 72.6 80.5 Up 06:13:05 - 06:31:09 -477
Susanville 06:22:05 -63.2 Dark Down 73.1 78.7 Up 06:13:03 - 06:31:07 -561
Greenville 06:22:06 -63.2 Dark Down 72.8 77.8 Up 06:13:04 - 06:31:08 -584
Gimple 06:22:06 -63.3 Dark Down 72.9 77.8 Up 06:13:04 - 06:31:08 -586
Quincy 06:22:07 -63.3 Dark Down 72.8 77.1 Up 06:13:05 - 06:31:09 -605
Portola 06:22:05 -63.7 Dark Down 73.1 76.8 Up 06:13:03 - 06:31:07 -630
Reno 06:22:04 -64.2 Dark Down 73.5 75.9 Up 06:13:02 - 06:31:06 -674
Carson City 06:22:04 -64.5 Dark Down 73.4 74.8 Up 06:13:02 - 06:31:06 -713
Gardnerville 06:22:04 -64.6 Dark Down 73.4 74.0 Up 06:13:02 - 06:31:06 -740
Yerington 06:22:02 -65.0 Dark Down 73.9 74.1 Up 06:13:00 - 06:31:04 -748
Hawthorne 06:22:01 -65.6 Dark Down 74.1 72.4 Up 06:12:59 - 06:31:03 -810
Dunrhomin 06:21:18 -71.4 Dark Down 84.5 73.8 Up 06:12:16 - 06:30:20 -832
CU-SBO 06:21:18 -71.6 Dark Down 84.3 71.5 Up 06:12:16 - 06:30:20 -859
Lee Vining 06:22:03 -65.5 Dark Down 73.6 70.7 Up 06:13:01 - 06:31:05 -859
Tonopah 06:21:57 -66.7 Dark Down 75.0 70.4 Up 06:12:55 - 06:30:59 -891
Bishop 06:22:02 -66.3 Dark Down 73.9 68.5 Up 06:13:00 - 06:31:04 -940
Beatty 06:21:57 -67.7 Dark Down 74.9 66.2 Up 06:12:55 - 06:30:59 -1025
Indian Springs 06:21:54 -68.6 Dark Down 75.6 64.3 Up 06:12:52 - 06:30:56 -1082
Henderson 06:21:52 -69.3 Dark Down 75.8 61.9 Up 06:12:50 - 06:30:54 -1153
Patrick 06:21:49 -70.4 Dark Down 76.3 58.6 Up 06:12:47 - 06:30:51 -1243
Laughlin/Bullhead City 06:21:51 -70.1 Dark Down 75.7 58.5 Up 06:12:49 - 06:30:53 -1256
Kingman/Dolan Springs 06:21:50 -70.4 Dark Down 76.0 58.0 Up 06:12:48 - 06:30:52 -1263
Mohave Valley 06:21:52 -70.2 Dark Down 75.5 57.6 Up 06:12:50 - 06:30:54 -1285
Wildwood 06:22:05 -67.6 Dark Down 72.3 59.0 Up 06:13:03 - 06:31:07 -1285
Lake Havasu City 06:21:51 -70.6 Dark Down 75.5 56.0 Up 06:12:49 - 06:30:53 -1333
Idyllwild 06:21:59 -69.2 Dark Down 73.4 56.3 Up 06:12:57 - 06:31:01 -1366
Parker 06:21:51 -70.8 Dark Down 75.3 54.9 Up 06:12:49 - 06:30:53 -1372
Calipatria 06:21:56 -70.3 Dark Down 73.9 53.4 Up 06:12:54 - 06:30:58 -1457
George/Scottsdale 06:21:43 -72.7 Dark Down 76.6 50.0 Up 06:12:41 - 06:30:45 -1462
Yuma 06:21:53 -71.2 Dark Down 74.2 51.1 Up 06:12:51 - 06:30:55 -1521

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 8405, (2022/12/21 06:21UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 27.37 126
34Bet Aur      05:59:31.6 +44:56:51  1.9  3.92 144
PPM 048445     05:47:14.7 +42:31:34  6.3  0.97 147
PPM 048454     05:48:20.7 +42:03:49  8.3  0.48 147
PPM 048448     05:47:29.2 +41:26:11  9.8  0.23 148
8405           05:48:24.3 +41:35:08 15.9       148
Positions are for J2000

Event circumstances last updated at 2022/03/17 00:56:50 UT

Marc W. Buie, Southwest Research Institute

RECON