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 06:18:18 UTC

J2000 position of star is 05:48:24.3 +41:35:08
Equinox of date position of star is 05:49:47.1 +41:35:26
Stellar brightness G=15.9, use SENSEUP=128
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 151 seconds.
The 1-sigma cross-track error in the shadow position is 887 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 06:18UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.3 +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 +42:31:59  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 24.7 km RECON observability=1.0 and success probability=55.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:19:17 -57.6 Dark Down 72.7 110.4 Up 06:06:13 - 06:32:20 817
Summerland 06:19:18 -57.6 Dark Down 72.6 109.1 Up 06:06:14 - 06:32:21 791
Penticton 06:19:18 -57.7 Dark Down 72.7 109.0 Up 06:06:14 - 06:32:21 782
Okanagan Falls 06:19:18 -57.9 Dark Down 72.8 108.4 Up 06:06:15 - 06:32:22 762
Oliver 06:19:18 -58.0 Dark Down 72.9 107.9 Up 06:06:15 - 06:32:22 745
Anarchist Mountain Observatory 06:19:18 -58.2 Dark Down 73.0 107.7 Up 06:06:14 - 06:32:21 723
Oroville 06:19:18 -58.2 Dark Down 73.0 107.4 Up 06:06:15 - 06:32:22 716
Tonasket 06:19:18 -58.4 Dark Down 73.1 106.6 Up 06:06:15 - 06:32:22 692
Okanogan 06:19:19 -58.6 Dark Down 73.1 105.4 Up 06:06:16 - 06:32:23 659
Brewster 06:19:20 -58.6 Dark Down 73.0 104.3 Up 06:06:17 - 06:32:24 634
Manson/Chelan 06:19:21 -58.6 Dark Down 72.8 103.1 Up 06:06:18 - 06:32:25 620
Wenatchee 06:19:22 -58.8 Dark Down 72.8 101.4 Up 06:06:19 - 06:32:26 573
Ellensburg 06:19:24 -59.0 Dark Down 72.7 99.9 Up 06:06:20 - 06:32:27 534
Yakima 06:19:24 -59.3 Dark Down 72.8 98.6 Up 06:06:21 - 06:32:28 492
Toppenish/White Swan 06:19:24 -59.5 Dark Down 73.0 98.0 Up 06:06:20 - 06:32:27 465
Pasco 06:19:21 -60.2 Dark Down 73.8 99.0 Up 06:06:17 - 06:32:24 426
Goldendale 06:19:26 -59.6 Dark Down 72.7 95.9 Up 06:06:22 - 06:32:29 416
The Dalles 06:19:27 -59.6 Dark Down 72.5 94.8 Up 06:06:24 - 06:32:31 401
George/Umatilla 06:19:22 -60.3 Dark Down 73.7 97.6 Up 06:06:18 - 06:32:25 395
PNWRO 06:19:20 -60.5 Dark Down 74.0 98.4 Up 06:06:17 - 06:32:24 395
Maupin 06:19:27 -59.9 Dark Down 72.6 93.6 Up 06:06:24 - 06:32:31 354
Madras/Culver 06:19:28 -60.2 Dark Down 72.6 91.8 Up 06:06:25 - 06:32:32 297
Sisters 06:19:30 -60.1 Dark Down 72.3 90.4 Up 06:06:26 - 06:32:33 272
Redmond 06:19:29 -60.4 Dark Down 72.6 90.6 Up 06:06:25 - 06:32:32 260
Bend 06:19:29 -60.4 Dark Down 72.5 89.8 Up 06:06:26 - 06:32:33 241
Oregon Observatory 06:19:30 -60.4 Dark Down 72.4 89.2 Up 06:06:27 - 06:32:34 225
La Pine/Gilchrist 06:19:30 -60.5 Dark Down 72.3 88.5 Up 06:06:27 - 06:32:34 205
North Lake 06:19:29 -61.1 Dark Down 72.8 87.5 Up 06:06:26 - 06:32:33 145
Chiloquin 06:19:33 -60.9 Dark Down 72.0 84.9 Up 06:06:29 - 06:32:36 96
Paisley 06:19:29 -61.7 Dark Down 73.0 85.9 Up 06:06:25 - 06:32:32 78
Klamath Falls 06:19:33 -61.2 Dark Down 72.0 83.9 Up 06:06:30 - 06:32:37 58
Tulelake 06:19:33 -61.5 Dark Down 72.2 83.2 Up 06:06:29 - 06:32:36 22
Lakeview 06:19:29 -62.1 Dark Down 73.1 84.3 Up 06:06:26 - 06:32:33 20
Cedarville 06:19:29 -62.5 Dark Down 73.1 82.3 Up 06:06:26 - 06:32:33 -54
Fall River/Burney 06:19:33 -62.0 Dark Down 72.2 80.4 Up 06:06:30 - 06:32:37 -77
Susanville 06:19:32 -62.8 Dark Down 72.6 78.6 Up 06:06:28 - 06:32:35 -162
Greenville 06:19:33 -62.8 Dark Down 72.3 77.7 Up 06:06:30 - 06:32:37 -184
Gimple 06:19:33 -62.8 Dark Down 72.4 77.7 Up 06:06:29 - 06:32:36 -186
Quincy 06:19:33 -62.9 Dark Down 72.3 77.1 Up 06:06:30 - 06:32:37 -206
Portola 06:19:32 -63.3 Dark Down 72.6 76.7 Up 06:06:29 - 06:32:36 -231
Reno 06:19:30 -63.8 Dark Down 73.0 75.9 Up 06:06:27 - 06:32:34 -274
Carson City 06:19:31 -64.0 Dark Down 73.0 74.8 Up 06:06:27 - 06:32:34 -313
Gardnerville 06:19:31 -64.2 Dark Down 72.9 74.0 Up 06:06:27 - 06:32:34 -341
Yerington 06:19:29 -64.5 Dark Down 73.4 74.1 Up 06:06:26 - 06:32:33 -349
Hawthorne 06:19:28 -65.1 Dark Down 73.6 72.5 Up 06:06:25 - 06:32:32 -411
Lee Vining 06:19:30 -65.1 Dark Down 73.1 70.9 Up 06:06:27 - 06:32:34 -460
SwRI 06:18:45 -71.4 Dark Down 83.8 72.6 Up 06:05:41 - 06:31:48 -469
Tonopah 06:19:24 -66.3 Dark Down 74.5 70.6 Up 06:06:21 - 06:32:28 -493
Bishop 06:19:29 -65.9 Dark Down 73.4 68.8 Up 06:06:25 - 06:32:32 -541
Beatty 06:19:24 -67.2 Dark Down 74.4 66.6 Up 06:06:20 - 06:32:27 -627
Lone Pine 06:19:28 -66.5 Dark Down 73.4 66.3 Up 06:06:25 - 06:32:32 -630
Indian Springs 06:19:21 -68.1 Dark Down 75.1 64.8 Up 06:06:17 - 06:32:24 -685
CPSLO 06:19:38 -65.1 Dark Down 71.0 63.8 Up 06:06:34 - 06:32:41 -706
Henderson 06:19:19 -68.9 Dark Down 75.4 62.5 Up 06:06:15 - 06:32:22 -756
Searchlight/Boulder City 06:19:19 -69.2 Dark Down 75.1 60.5 Up 06:06:16 - 06:32:23 -820
Patrick 06:19:16 -70.0 Dark Down 75.8 59.3 Up 06:06:12 - 06:32:19 -846
Laughlin/Bullhead City 06:19:18 -69.6 Dark Down 75.2 59.2 Up 06:06:15 - 06:32:22 -859
Kingman/Dolan Springs 06:19:17 -70.0 Dark Down 75.6 58.7 Up 06:06:13 - 06:32:20 -867
Wildwood 06:19:32 -67.1 Dark Down 71.9 59.5 Up 06:06:29 - 06:32:36 -886
Mohave Valley 06:19:18 -69.7 Dark Down 75.1 58.3 Up 06:06:15 - 06:32:22 -888
Lake Havasu City 06:19:18 -70.1 Dark Down 75.0 56.8 Up 06:06:15 - 06:32:22 -936
Idyllwild 06:19:27 -68.7 Dark Down 73.0 57.0 Up 06:06:23 - 06:32:30 -968
Parker 06:19:18 -70.3 Dark Down 74.9 55.7 Up 06:06:15 - 06:32:22 -975
Blythe 06:19:20 -70.3 Dark Down 74.4 54.4 Up 06:06:16 - 06:32:23 -1025
Calipatria 06:19:23 -69.8 Dark Down 73.4 54.1 Up 06:06:20 - 06:32:27 -1059
Yuma 06:19:21 -70.7 Dark Down 73.8 51.9 Up 06:06:17 - 06:32:24 -1124

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 06:18UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +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 +42:31:35  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 2019/06/16 22:14:50 UT

Marc W. Buie, Southwest Research Institute

RECON