RECON: TNO occultation with 04TT357

Event between 04TT357 and star UC4-544-013196 with event index number of 301784

Geocentric closest approach at 2020/09/30 11:10:00 UTC

J2000 position of star is 05:14:33.7 +18:46:02
Equinox of date position of star is 05:15:40.3 +18:47:16
Stellar brightness R=16.5, use SENSEUP=128
Star is 87 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=23.0

[RECON map]
TNO is 33.2 AU from the Sun and 32.8 AU from the Earth.
The TNO is moving 4.8 km/sec on the sky relative to the star, or, 0.7 arcsec/hr.
The 1-sigma error in the time of the event is 874 seconds.
The 1-sigma cross-track error in the shadow position is 1843 km.
The sky-plane scale is 23818.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=184.5 km assuming a 5% albedo -- 37.8 sec chord
Diameter=75.3 km assuming a 30% albedo -- 15.4 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 

Star training set for 04TT357, (2020/09/30 11:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:06.8 +16:32:58  0.8  9.48  77
Alnath         05:27:36.3 +28:37:23  1.6 10.20  91
PPM 120839     05:21:31.8 +19:35:52  6.5  1.58  88
PPM 120767     05:16:57.3 +19:45:06  8.3  1.00  87
PPM 120768     05:17:02.2 +18:39:36  9.0  0.32  87
04TT357        05:15:46.7 +18:47:23 16.5        87
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 1.0 sigma about the mid-time.
The median site spacing is 12.7 km RECON observability=1.0 and success probability=20.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 11:06:22 -27.4 Dark Up 54.2 142.4 Up 10:51:22 - 11:21:22 -21
Kelowna 11:06:17 -27.2 Dark Up 54.3 142.9 Up 10:51:17 - 11:21:17 -37
Penticton 11:06:25 -27.4 Dark Up 54.6 142.4 Up 10:51:25 - 11:21:25 -47
Okanagan Falls 11:06:29 -27.5 Dark Up 54.7 142.2 Up 10:51:29 - 11:21:29 -56
Oliver 11:06:32 -27.6 Dark Up 54.9 142.1 Up 10:51:32 - 11:21:32 -66
Anarchist Mountain Observatory 11:06:32 -27.6 Dark Up 55.1 142.3 Up 10:51:32 - 11:21:32 -85
Oroville 11:06:34 -27.7 Dark Up 55.1 142.1 Up 10:51:34 - 11:21:34 -85
Tonasket 11:06:38 -27.8 Dark Up 55.3 141.9 Up 10:51:38 - 11:21:38 -98
Manson/Chelan 11:06:58 -28.6 Dark Up 55.7 140.2 Up 10:51:58 - 11:21:58 -106
Okanogan 11:06:44 -28.0 Dark Up 55.5 141.5 Up 10:51:44 - 11:21:44 -108
Brewster 11:06:51 -28.2 Dark Up 55.6 140.9 Up 10:51:51 - 11:21:51 -113
Entiat 11:07:03 -28.7 Dark Up 55.8 140.0 Up 10:52:03 - 11:22:03 -114
Wenatchee 11:07:08 -28.9 Dark Up 56.0 139.6 Up 10:52:08 - 11:22:08 -123
Ellensburg 11:07:16 -29.2 Dark Up 56.2 138.9 Up 10:52:16 - 11:22:16 -134
Yakima 11:07:23 -29.4 Dark Up 56.5 138.5 Up 10:52:23 - 11:22:23 -156
Toppenish/White Swan 11:07:27 -29.4 Dark Up 56.8 138.6 Up 10:52:27 - 11:22:27 -176
The Dalles 11:07:47 -30.2 Dark Up 57.0 136.7 Up 10:52:47 - 11:22:47 -178
Goldendale 11:07:39 -29.9 Dark Up 57.0 137.5 Up 10:52:39 - 11:22:39 -185
Maupin 11:07:53 -30.3 Dark Up 57.4 136.5 Up 10:52:53 - 11:22:53 -207
Sisters 11:08:13 -31.0 Dark Up 57.8 134.9 Up 10:53:13 - 11:23:13 -231
Madras/Culver 11:08:02 -30.6 Dark Up 57.8 135.9 Up 10:53:02 - 11:23:02 -236
Pasco 11:07:15 -28.7 Dark Up 57.4 140.3 Up 10:52:15 - 11:22:15 -249
Redmond 11:08:09 -30.8 Dark Up 58.0 135.4 Up 10:53:09 - 11:23:09 -254
George/Umatilla 11:07:23 -29.0 Dark Up 57.6 139.7 Up 10:52:23 - 11:22:23 -257
Bend 11:08:14 -31.0 Dark Up 58.1 135.0 Up 10:53:14 - 11:23:14 -259
Oregon Observatory 11:08:18 -31.1 Dark Up 58.2 134.6 Up 10:53:18 - 11:23:18 -262
La Pine/Gilchrist 11:08:22 -31.3 Dark Up 58.3 134.3 Up 10:53:22 - 11:23:22 -270
PNWRO 11:07:17 -28.7 Dark Up 57.7 140.5 Up 10:52:17 - 11:22:17 -276
Chiloquin 11:08:45 -32.0 Dark Up 58.9 132.6 Up 10:53:45 - 11:23:45 -316
North Lake 11:08:23 -31.1 Dark Up 58.9 134.8 Up 10:53:23 - 11:23:23 -328
Klamath Falls 11:08:50 -32.1 Dark Up 59.2 132.4 Up 10:53:50 - 11:23:50 -340
Tulelake 11:08:51 -32.0 Dark Up 59.5 132.5 Up 10:53:51 - 11:23:51 -373
Paisley 11:08:28 -31.1 Dark Up 59.5 134.7 Up 10:53:28 - 11:23:28 -381
Lakeview 11:08:36 -31.2 Dark Up 60.0 134.4 Up 10:53:36 - 11:23:36 -422
Fall River/Burney 11:09:05 -32.3 Dark Up 60.2 131.5 Up 10:54:05 - 11:24:05 -432
Cedarville 11:08:45 -31.4 Dark Up 60.5 133.9 Up 10:53:45 - 11:23:45 -472
Greenville 11:09:18 -32.4 Dark Up 61.1 131.1 Up 10:54:18 - 11:24:18 -513
Susanville 11:09:09 -32.1 Dark Up 61.1 131.9 Up 10:54:09 - 11:24:09 -513
Gimple 11:09:15 -32.4 Dark Up 61.2 131.2 Up 10:54:15 - 11:24:15 -518
Quincy 11:09:20 -32.5 Dark Up 61.3 130.8 Up 10:54:20 - 11:24:20 -526
Portola 11:09:17 -32.2 Dark Up 61.6 131.4 Up 10:54:17 - 11:24:17 -562
Reno 11:09:14 -31.9 Dark Up 62.2 132.1 Up 10:54:14 - 11:24:14 -616
Carson City 11:09:20 -32.0 Dark Up 62.4 131.6 Up 10:54:20 - 11:24:20 -640
Gardnerville 11:09:23 -32.1 Dark Up 62.6 131.4 Up 10:54:23 - 11:24:23 -659
Yerington 11:09:16 -31.7 Dark Up 62.9 132.3 Up 10:54:16 - 11:24:16 -690
Hawthorne 11:09:18 -31.5 Dark Up 63.5 132.6 Up 10:54:18 - 11:24:18 -751
Lee Vining 11:09:32 -32.0 Dark Up 63.7 131.0 Up 10:54:32 - 11:24:32 -759
Bishop 11:09:33 -31.7 Dark Up 64.5 131.3 Up 10:54:33 - 11:24:33 -842
CPSLO 11:10:33 -34.1 Dark Up 64.5 124.6 Up 10:55:33 - 11:25:33 -843
Tonopah 11:09:08 -30.7 Dark Up 64.6 134.2 Up 10:54:08 - 11:24:08 -865
Lone Pine 11:09:42 -31.8 Dark Up 65.2 130.7 Up 10:54:42 - 11:24:42 -913
Beatty 11:09:22 -30.8 Dark Up 65.7 133.4 Up 10:54:22 - 11:24:22 -970
Wildwood 11:10:29 -33.0 Dark Up 66.5 125.7 Up 10:55:29 - 11:25:29 -1053
Indian Springs 11:09:15 -30.1 Dark Up 66.6 134.8 Up 10:54:15 - 11:24:15 -1058
Henderson 11:09:14 -29.7 Dark Up 67.3 135.2 Up 10:54:14 - 11:24:14 -1137
Searchlight/Boulder City 11:09:22 -29.9 Dark Up 67.8 134.4 Up 10:54:22 - 11:24:22 -1181
Idyllwild 11:10:11 -31.7 Dark Up 68.0 128.2 Up 10:55:11 - 11:25:11 -1195
Laughlin/Bullhead City 11:09:23 -29.7 Dark Up 68.2 134.6 Up 10:54:23 - 11:24:23 -1223
Mohave Valley 11:09:26 -29.8 Dark Up 68.4 134.2 Up 10:54:26 - 11:24:26 -1243
Patrick 11:09:10 -29.1 Dark Up 68.4 136.4 Up 10:54:10 - 11:24:10 -1249
Kingman/Dolan Springs 11:09:17 -29.3 Dark Up 68.5 135.7 Up 10:54:17 - 11:24:17 -1254
Lake Havasu City 11:09:30 -29.7 Dark Up 68.8 134.0 Up 10:54:30 - 11:24:30 -1287
Calipatria 11:10:07 -31.0 Dark Up 69.1 129.2 Up 10:55:07 - 11:25:07 -1312
DCO 11:09:05 -28.7 Dark Up 69.0 137.3 Up 10:54:05 - 11:24:05 -1314
Parker 11:09:34 -29.8 Dark Up 69.1 133.4 Up 10:54:34 - 11:24:34 -1315
Blythe 11:09:44 -30.1 Dark Up 69.3 131.8 Up 10:54:44 - 11:24:44 -1334
Yuma 11:10:02 -30.4 Dark Up 69.9 130.0 Up 10:55:02 - 11:25:02 -1400
Niwot 11:06:12 -21.7 Dark Up 67.7 160.8 Up 10:51:12 - 11:21:12 -1411

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 04TT357, (2020/09/30 11:10UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  9.48  77
Alnath         05:26:17.5 +28:36:23  1.6 10.20  91
PPM 120839     05:20:18.3 +19:34:41  6.5  1.58  88
PPM 120767     05:15:43.8 +19:43:48  8.3  1.00  87
PPM 120768     05:15:49.2 +18:38:18  9.0  0.32  87
04TT357        05:14:33.7 +18:46:02 16.5        87
Positions are for J2000

Event circumstances last updated at 2018/11/30 19:43:13 UT

Marc W. Buie, Southwest Research Institute

RECON