RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:03023928 with event index number of 1242386

Geocentric closest approach at 2023/02/02 07:04:38 UTC

J2000 position of star is 05:41:04.4 +41:20:03
Equinox of date position of star is 05:42:38.7 +41:20:38
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 16 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=23.1

[RECON map]
TNO is 24.5 AU from the Sun and 23.9 AU from the Earth.
The TNO is moving 18.0 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 136 seconds.
The 1-sigma cross-track error in the shadow position is 1324 km.
The sky-plane scale is 17300.8 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 5.1 sec chord
Diameter=37.2 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2023/02/02 07:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:14.9 +16:33:14  0.8 28.51  27
34Bet Aur      06:01:13.4 +44:56:50  1.9  4.94  18
PPM 048217     05:35:07.4 +42:07:23  6.2  1.62  18
PPM 048329     05:40:46.7 +41:22:09  7.1  0.36  17
PPM 048351     05:42:41.4 +41:22:17  9.6  0.03  16
8405           05:42:42.5 +41:20:39 15.7        16
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 30.1 km RECON observability=1.0 and success probability=43.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:01:31 -54.6 Dark Up 57.1 269.7 Up 06:49:39 - 07:13:23 664
Kamloops 07:02:18 -53.2 Dark Up 66.0 259.6 Up 06:50:26 - 07:14:10 433
Kelowna 07:02:15 -54.2 Dark Up 65.6 262.3 Up 06:50:23 - 07:14:07 342
Peachland 07:02:16 -54.2 Dark Up 65.8 262.3 Up 06:50:24 - 07:14:08 330
Summerland 07:02:16 -54.3 Dark Up 65.8 262.7 Up 06:50:24 - 07:14:08 313
Penticton 07:02:15 -54.4 Dark Up 65.7 262.9 Up 06:50:23 - 07:14:07 306
Oliver 07:02:15 -54.7 Dark Up 65.7 263.7 Up 06:50:23 - 07:14:07 266
Anarchist Mountain Observatory 07:02:14 -55.0 Dark Up 65.6 264.3 Up 06:50:22 - 07:14:06 247
Tonasket 07:02:15 -55.2 Dark Up 65.7 264.9 Up 06:50:23 - 07:14:07 213
Victoria 07:02:29 -53.9 Dark Up 68.3 261.6 Up 06:50:37 - 07:14:21 201
Okanogan 07:02:15 -55.4 Dark Up 65.8 265.5 Up 06:50:23 - 07:14:07 176
Brewster 07:02:16 -55.6 Dark Up 66.0 265.9 Up 06:50:24 - 07:14:08 146
Manson/Chelan 07:02:17 -55.7 Dark Up 66.2 266.1 Up 06:50:25 - 07:14:09 123
Wenatchee 07:02:18 -56.0 Dark Up 66.4 267.0 Up 06:50:26 - 07:14:10 70
Ellensburg 07:02:19 -56.3 Dark Up 66.5 267.8 Up 06:50:27 - 07:14:11 24
Yakima 07:02:19 -56.6 Dark Up 66.6 268.7 Up 06:50:27 - 07:14:11 -21
Toppenish/White Swan 07:02:18 -56.8 Dark Up 66.5 269.3 Up 06:50:26 - 07:14:10 -45
PNWRO 07:02:12 -57.7 Dark Up 65.4 271.2 Up 06:50:20 - 07:14:04 -86
Goldendale 07:02:20 -57.1 Dark Up 66.8 270.3 Up 06:50:28 - 07:14:12 -106
The Dalles 07:02:21 -57.2 Dark Up 67.0 270.6 Up 06:50:29 - 07:14:13 -130
Maupin 07:02:21 -57.6 Dark Up 66.9 271.6 Up 06:50:29 - 07:14:13 -177
Sisters 07:02:23 -58.1 Dark Up 67.2 273.4 Up 06:50:31 - 07:14:15 -274
Bend 07:02:22 -58.4 Dark Up 67.0 274.1 Up 06:50:30 - 07:14:14 -301
Oregon Observatory 07:02:23 -58.5 Dark Up 67.1 274.5 Up 06:50:31 - 07:14:15 -320
North Lake 07:02:21 -59.2 Dark Up 66.7 276.2 Up 06:50:29 - 07:14:13 -392
Chiloquin 07:02:25 -59.3 Dark Up 67.3 277.4 Up 06:50:33 - 07:14:17 -465
Klamath Falls 07:02:24 -59.6 Dark Up 67.2 278.2 Up 06:50:32 - 07:14:16 -503
Lakeview 07:02:19 -60.3 Dark Up 66.1 278.9 Up 06:50:27 - 07:14:11 -510
Cedarville 07:02:18 -60.9 Dark Up 65.9 280.4 Up 06:50:26 - 07:14:10 -583
Dunrhomin 07:01:18 -66.4 Dark Up 54.8 287.5 Up 06:49:26 - 07:13:10 -621
Fall River/Burney 07:02:23 -60.7 Dark Up 66.7 281.1 Up 06:50:31 - 07:14:15 -635
CU-SBO 07:01:18 -66.7 Dark Up 54.8 287.8 Up 06:49:26 - 07:13:10 -649
Susanville 07:02:20 -61.5 Dark Up 66.0 282.7 Up 06:50:28 - 07:14:12 -706
Greenville 07:02:22 -61.6 Dark Up 66.2 283.2 Up 06:50:30 - 07:14:14 -736
Gimple 07:02:21 -61.7 Dark Up 66.1 283.3 Up 06:50:29 - 07:14:13 -736
Quincy 07:02:22 -61.8 Dark Up 66.1 283.7 Up 06:50:30 - 07:14:14 -758
Portola 07:02:20 -62.1 Dark Up 65.7 284.1 Up 06:50:28 - 07:14:12 -773
Reno 07:02:17 -62.6 Dark Up 65.2 284.8 Up 06:50:25 - 07:14:09 -802
Carson City 07:02:17 -62.9 Dark Up 65.1 285.5 Up 06:50:25 - 07:14:09 -842
Yerington 07:02:14 -63.4 Dark Up 64.6 286.0 Up 06:50:22 - 07:14:06 -864
Gardnerville 07:02:17 -63.1 Dark Up 65.0 286.0 Up 06:50:25 - 07:14:09 -869
Hawthorne 07:02:12 -64.0 Dark Up 64.0 287.1 Up 06:50:20 - 07:14:04 -914
Tonopah 07:02:06 -65.0 Dark Up 62.9 288.1 Up 06:50:14 - 07:13:58 -964
Lee Vining 07:02:15 -64.2 Dark Up 64.2 288.1 Up 06:50:23 - 07:14:07 -977
Bishop 07:02:11 -65.0 Dark Up 63.5 289.3 Up 06:50:19 - 07:14:03 -1042
Beatty 07:02:05 -66.2 Dark Up 62.1 290.3 Up 06:50:13 - 07:13:57 -1090
Indian Springs 07:02:00 -66.9 Dark Up 61.2 290.9 Up 06:50:08 - 07:13:52 -1122
Henderson 07:01:57 -67.7 Dark Up 60.5 291.9 Up 06:50:05 - 07:13:49 -1177
Patrick 07:01:52 -68.7 Dark Up 59.5 292.9 Up 06:50:00 - 07:13:44 -1239
Kingman/Dolan Springs 07:01:53 -68.8 Dark Up 59.5 293.3 Up 06:50:01 - 07:13:45 -1264
Laughlin/Bullhead City 07:01:55 -68.6 Dark Up 59.9 293.3 Up 06:50:03 - 07:13:47 -1270
Mohave Valley 07:01:55 -68.8 Dark Up 59.8 293.7 Up 06:50:03 - 07:13:47 -1299
Lake Havasu City 07:01:55 -69.3 Dark Up 59.4 294.4 Up 06:50:03 - 07:13:47 -1341
Parker 07:01:54 -69.6 Dark Up 59.3 294.9 Up 06:50:02 - 07:13:46 -1379
Wildwood 07:02:14 -67.3 Dark Up 62.4 295.3 Up 06:50:22 - 07:14:06 -1399
George/Scottsdale 07:01:44 -71.0 Dark Up 57.3 295.5 Up 06:49:52 - 07:13:36 -1408
Idyllwild 07:02:05 -68.6 Dark Up 60.9 295.7 Up 06:50:13 - 07:13:57 -1434
Calipatria 07:02:00 -69.7 Dark Up 59.7 296.5 Up 06:50:08 - 07:13:52 -1495
Yuma 07:01:57 -70.5 Dark Up 58.9 297.1 Up 06:50:05 - 07:13:49 -1538

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, (2023/02/02 07:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 28.51  27
34Bet Aur      05:59:31.6 +44:56:51  1.9  4.94  18
PPM 048217     05:33:28.7 +42:06:32  6.2  1.62  18
PPM 048329     05:39:08.6 +41:21:29  7.1  0.36  17
PPM 048351     05:41:03.3 +41:21:40  9.6  0.03  16
8405           05:41:04.4 +41:20:03 15.7        16
Positions are for J2000

Event circumstances last updated at 2022/03/18 00:56:56 UT

Marc W. Buie, Southwest Research Institute

RECON