RECON: TNO occultation with 04TT357

Event between 04TT357 and star GA1080:00680692 with event index number of 215027

Geocentric closest approach at 2019/01/09 10:03:04 UTC

J2000 position of star is 04:47:18.9 +18:35:59
Equinox of date position of star is 04:48:25.2 +18:37:56
Stellar brightness G=14.8, use SENSEUP=128
Star is 107 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 32.8 AU from the Sun and 32.0 AU from the Earth.
The TNO is moving 18.6 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 230 seconds.
The 1-sigma cross-track error in the shadow position is 1268 km.
The sky-plane scale is 23205.5 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=182.0 km assuming a 5% albedo -- 9.8 sec chord
Diameter=74.3 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is 5:2EEE
 
 
 
 
 
 

Star training set for 04TT357, (2019/01/09 10:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:00.9 +16:32:46  0.8  3.43 104
Alnath         05:27:29.8 +28:37:18  1.6 13.40 117
97 Tau         04:52:29.4 +18:52:14  5.1  0.99 108
PPM 120231     04:47:23.6 +18:46:03  7.1  0.28 107
PPM 120251     04:48:13.7 +18:31:13  8.7  0.12 107
PPM 120256     04:48:37.9 +18:31:48 10.4  0.11 107
04TT357        04:48:25.5 +18:37:57 14.8       108
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 3.9 sigma about the mid-time.
The median site spacing is 20.4 km RECON observability=1.0 and success probability=6.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:59:16 -54.2 Dark Down 28.7 265.1 Low 09:44:16 - 10:14:16 4121
Summerland 09:59:17 -54.4 Dark Down 28.9 264.8 Low 09:44:17 - 10:14:17 4110
Penticton 09:59:16 -54.6 Dark Down 28.8 265.2 Low 09:44:16 - 10:14:16 4086
Okanagan Falls 09:59:15 -54.7 Dark Down 28.9 265.3 Low 09:44:15 - 10:14:15 4069
Oliver 09:59:14 -54.8 Dark Down 28.9 265.4 Low 09:44:14 - 10:14:14 4055
Anarchist Mountain Observatory 09:59:13 -54.8 Dark Down 28.7 265.6 Low 09:44:13 - 10:14:13 4043
Oroville 09:59:13 -54.9 Dark Down 28.8 265.6 Low 09:44:13 - 10:14:13 4036
Tonasket 09:59:12 -55.0 Dark Down 28.8 265.7 Low 09:44:12 - 10:14:12 4015
Okanogan 09:59:11 -55.3 Dark Down 28.9 265.8 Low 09:44:11 - 10:14:11 3983
Brewster 09:59:11 -55.6 Dark Down 29.1 265.8 Low 09:44:11 - 10:14:11 3955
Manson/Chelan 09:59:10 -55.9 Dark Down 29.4 265.6 Low 09:44:10 - 10:14:10 3929
Entiat 09:59:10 -56.1 Dark Down 29.4 265.7 Low 09:44:10 - 10:14:10 3909
Wenatchee 09:59:09 -56.3 Dark Down 29.5 265.7 Low 09:44:09 - 10:14:09 3884
Ellensburg 09:59:08 -56.7 Dark Down 29.7 265.8 Low 09:44:08 - 10:14:08 3843
Yakima 09:59:07 -57.0 Dark Down 29.7 266.0 Low 09:44:07 - 10:14:07 3805
Pasco 09:59:03 -56.4 Dark Down 28.8 267.3 Low 09:44:03 - 10:14:03 3802
Toppenish/White Swan 09:59:06 -57.0 Dark Down 29.7 266.3 Low 09:44:06 - 10:14:06 3789
PNWRO 09:59:01 -56.4 Dark Down 28.6 267.6 Low 09:44:01 - 10:14:01 3784
George/Umatilla 09:59:03 -56.7 Dark Down 29.0 267.3 Low 09:44:03 - 10:14:03 3768
Goldendale 09:59:04 -57.6 Dark Down 30.0 266.3 Low 09:44:04 - 10:14:04 3731
The Dalles 09:59:04 -57.9 Dark Down 30.3 266.1 Up 09:44:04 - 10:14:04 3703
Maupin 09:59:03 -58.1 Dark Down 30.2 266.4 Up 09:44:03 - 10:14:03 3667
Madras/Culver 09:59:01 -58.5 Dark Down 30.3 266.7 Up 09:44:01 - 10:14:01 3615
Redmond 09:59:00 -58.7 Dark Down 30.3 266.9 Up 09:44:00 - 10:14:00 3581
Sisters 09:59:01 -58.9 Dark Down 30.6 266.6 Up 09:44:01 - 10:14:01 3575
Bend 09:59:00 -58.9 Dark Down 30.5 266.9 Up 09:44:00 - 10:14:00 3558
Niwot 09:58:23 -49.8 Dark Down 18.4 279.2 Really Low 09:43:23 - 10:13:23 3554
Oregon Observatory 09:59:00 -59.1 Dark Down 30.6 266.9 Up 09:44:00 - 10:14:00 3539
La Pine/Gilchrist 09:58:59 -59.3 Dark Down 30.6 267.0 Up 09:43:59 - 10:13:59 3519
North Lake 09:58:56 -59.2 Dark Down 30.2 267.7 Up 09:43:56 - 10:13:56 3490
Paisley 09:58:54 -59.3 Dark Down 30.0 268.2 Low 09:43:54 - 10:13:54 3445
Chiloquin 09:58:56 -60.1 Dark Down 30.9 267.4 Up 09:43:56 - 10:13:56 3407
Lakeview 09:58:52 -59.4 Dark Down 29.8 268.6 Low 09:43:52 - 10:13:52 3401
Klamath Falls 09:58:55 -60.3 Dark Down 30.9 267.6 Up 09:43:55 - 10:13:55 3376
Tulelake 09:58:54 -60.3 Dark Down 30.7 268.0 Up 09:43:54 - 10:13:54 3357
Cedarville 09:58:50 -59.7 Dark Down 29.7 269.1 Low 09:43:50 - 10:13:50 3342
Fall River/Burney 09:58:50 -60.7 Dark Down 30.7 268.6 Up 09:43:50 - 10:13:50 3271
Susanville 09:58:47 -60.6 Dark Down 30.1 269.4 Up 09:43:47 - 10:13:47 3226
Gimple 09:58:47 -60.8 Dark Down 30.3 269.5 Up 09:43:47 - 10:13:47 3194
Greenville 09:58:47 -60.9 Dark Down 30.3 269.4 Up 09:43:47 - 10:13:47 3193
Quincy 09:58:47 -61.0 Dark Down 30.3 269.5 Up 09:43:47 - 10:13:47 3173
Portola 09:58:45 -60.7 Dark Down 30.0 269.9 Low 09:43:45 - 10:13:45 3171
Reno 09:58:43 -60.4 Dark Down 29.5 270.5 Low 09:43:43 - 10:13:43 3159
Carson City 09:58:42 -60.6 Dark Down 29.5 270.7 Low 09:43:42 - 10:13:42 3125
Yerington 09:58:40 -60.2 Dark Down 29.0 271.2 Low 09:43:40 - 10:13:40 3119
Gardnerville 09:58:41 -60.7 Dark Down 29.4 270.9 Low 09:43:41 - 10:13:41 3102
Hawthorne 09:58:38 -60.1 Dark Down 28.6 271.8 Low 09:43:38 - 10:13:38 3086
Tonopah 09:58:33 -59.2 Dark Down 27.5 272.9 Low 09:43:33 - 10:13:33 3071
Lee Vining 09:58:37 -60.7 Dark Down 28.9 271.8 Low 09:43:37 - 10:13:37 3020
Bishop 09:58:34 -60.4 Dark Down 28.4 272.5 Low 09:43:34 - 10:13:34 2977
Beatty 09:58:30 -59.3 Dark Down 27.0 273.7 Low 09:43:30 - 10:13:30 2969
Indian Springs 09:58:27 -58.6 Dark Down 26.2 274.5 Low 09:43:27 - 10:13:27 2962
Henderson 09:58:24 -58.3 Dark Down 25.6 275.1 Low 09:43:24 - 10:13:24 2926
Lone Pine 09:58:31 -60.4 Dark Down 28.1 273.1 Low 09:43:31 - 10:13:31 2910
Patrick 09:58:21 -57.6 Dark Down 24.6 276.0 Low 09:43:21 - 10:13:21 2891
DCO 09:58:19 -57.1 Dark Down 24.0 276.5 Low 09:43:19 - 10:13:19 2878
Searchlight/Boulder City 09:58:22 -58.4 Dark Down 25.5 275.4 Low 09:43:22 - 10:13:22 2871
Kingman/Dolan Springs 09:58:20 -57.8 Dark Down 24.7 276.0 Low 09:43:20 - 10:13:20 2865
Laughlin/Bullhead City 09:58:21 -58.2 Dark Down 25.2 275.7 Low 09:43:21 - 10:13:21 2850
Mohave Valley 09:58:20 -58.3 Dark Down 25.1 275.9 Low 09:43:20 - 10:13:20 2823
Lake Havasu City 09:58:19 -58.2 Dark Down 24.9 276.2 Low 09:43:19 - 10:13:19 2790
Parker 09:58:18 -58.2 Dark Down 24.8 276.4 Low 09:43:18 - 10:13:18 2755
CPSLO 09:58:33 -62.8 Dark Down 30.1 272.4 Up 09:43:33 - 10:13:33 2723
Blythe 09:58:17 -58.6 Dark Down 25.0 276.5 Low 09:43:17 - 10:13:17 2696
Idyllwild 09:58:21 -60.3 Dark Down 26.8 275.3 Low 09:43:21 - 10:13:21 2656
Wildwood 09:58:25 -61.7 Dark Down 28.4 274.1 Low 09:43:25 - 10:13:25 2648
Calipatria 09:58:17 -59.5 Dark Down 25.7 276.2 Low 09:43:17 - 10:13:17 2624
Yuma 09:58:14 -58.8 Dark Down 25.0 276.9 Low 09:43:14 - 10:13:14 2602

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, (2019/01/09 10:03UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8  3.43 104
Alnath         05:26:17.5 +28:36:23  1.6 13.40 117
97 Tau         04:51:22.6 +18:50:23  5.1  0.99 108
PPM 120231     04:46:16.9 +18:44:04  7.1  0.28 107
PPM 120251     04:47:07.2 +18:29:15  8.7  0.12 107
PPM 120256     04:47:31.3 +18:29:51 10.4  0.11 107
04TT357        04:47:18.9 +18:35:59 14.8       107
Positions are for J2000

Event circumstances last updated at 2018/12/04 05:07:23 UT

Marc W. Buie, Southwest Research Institute

RECON