RECON: TNO occultation with 03TK58

Event between 03TK58 and star UC4-574-020193 with event index number of 97975

Geocentric closest approach at 2018/01/10 05:49:53 UTC

J2000 position of star is 05:51:48.0 +24:39:47
Equinox of date position of star is 05:52:52.0 +24:39:59
Stellar brightness R=15.5, use SENSEUP=128
Star is 127 degrees from the moon. Moon is 37% illuminated.
TNO apparent brightness V=23.9

[RECON map]
TNO is 45.9 AU from the Sun and 44.9 AU from the Earth.
The TNO is moving 24.0 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 674 seconds.
The 1-sigma cross-track error in the shadow position is 5393 km.
The sky-plane scale is 32590.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=208.9 km assuming a 5% albedo -- 8.7 sec chord
Diameter=85.3 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 03TK58, (2018/01/10 05:50UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:08.9 +07:24:32  0.4 17.27 126
Alnath         05:27:26.0 +28:37:16  1.6  6.93 131
132 Tau        05:50:07.4 +24:34:19  4.9  0.64 127
PPM 095035     05:54:39.9 +24:17:22  8.1  0.55 126
PPM 094983     05:52:45.7 +24:42:30 10.2  0.05 127
03TK58         05:52:54.5 +24:39:59 15.5       126
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 1.3 sigma about the mid-time.
The median site spacing is 23.5 km RECON observability=1.0 and success probability=8.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 05:50:22 -52.1 Dark Down 64.5 158.3 Up 05:35:22 - 06:05:22 4234
Tonasket 05:50:22 -52.2 Dark Down 64.7 158.2 Up 05:35:22 - 06:05:22 4211
Okanogan 05:50:23 -52.3 Dark Down 65.0 157.6 Up 05:35:23 - 06:05:23 4178
Brewster 05:50:24 -52.3 Dark Down 65.2 156.9 Up 05:35:24 - 06:05:24 4152
Manson/Chelan 05:50:25 -52.2 Dark Down 65.3 156.0 Up 05:35:25 - 06:05:25 4133
Entiat 05:50:25 -52.3 Dark Down 65.4 155.7 Up 05:35:25 - 06:05:25 4111
Wenatchee 05:50:26 -52.4 Dark Down 65.6 155.2 Up 05:35:26 - 06:05:26 4086
Ellensburg 05:50:27 -52.5 Dark Down 66.0 154.4 Up 05:35:27 - 06:05:27 4045
Yakima 05:50:28 -52.7 Dark Down 66.3 154.0 Up 05:35:28 - 06:05:28 4004
Toppenish/White Swan 05:50:27 -52.9 Dark Down 66.6 154.1 Up 05:35:27 - 06:05:27 3980
Pasco 05:50:23 -53.7 Dark Down 67.0 156.7 Up 05:35:23 - 06:05:23 3959
PNWRO 05:50:23 -53.9 Dark Down 67.3 157.0 Up 05:35:23 - 06:05:23 3933
Goldendale 05:50:29 -52.9 Dark Down 66.9 152.6 Up 05:35:29 - 06:05:29 3927
George/Umatilla 05:50:24 -53.7 Dark Down 67.3 155.9 Up 05:35:24 - 06:05:24 3926
The Dalles 05:50:30 -52.8 Dark Down 67.0 151.6 Up 05:35:30 - 06:05:30 3906
Maupin 05:50:30 -53.0 Dark Down 67.4 151.3 Up 05:35:30 - 06:05:30 3862
Madras/Culver 05:50:31 -53.2 Dark Down 67.9 150.6 Up 05:35:31 - 06:05:31 3806
Sisters 05:50:32 -53.1 Dark Down 68.0 149.2 Up 05:35:32 - 06:05:32 3775
Redmond 05:50:31 -53.4 Dark Down 68.2 150.1 Up 05:35:31 - 06:05:31 3770
Bend 05:50:32 -53.4 Dark Down 68.3 149.5 Up 05:35:32 - 06:05:32 3748
Oregon Observatory 05:50:33 -53.4 Dark Down 68.4 149.0 Up 05:35:33 - 06:05:33 3732
La Pine/Gilchrist 05:50:33 -53.4 Dark Down 68.6 148.6 Up 05:35:33 - 06:05:33 3711
North Lake 05:50:31 -54.0 Dark Down 69.2 149.4 Up 05:35:31 - 06:05:31 3661
Paisley 05:50:30 -54.4 Dark Down 69.8 149.4 Up 05:35:30 - 06:05:30 3600
Chiloquin 05:50:34 -53.6 Dark Down 69.4 146.2 Up 05:35:34 - 06:05:34 3597
Klamath Falls 05:50:34 -53.8 Dark Down 69.7 145.9 Up 05:35:34 - 06:05:34 3561
Lakeview 05:50:29 -54.8 Dark Down 70.3 149.2 Up 05:35:29 - 06:05:29 3545
Tulelake 05:50:34 -54.1 Dark Down 70.0 146.2 Up 05:35:34 - 06:05:34 3530
Cedarville 05:50:29 -55.2 Dark Down 70.9 148.7 Up 05:35:29 - 06:05:29 3475
Fall River/Burney 05:50:34 -54.5 Dark Down 70.8 144.9 Up 05:35:34 - 06:05:34 3433
Susanville 05:50:32 -55.3 Dark Down 71.6 145.7 Up 05:35:32 - 06:05:32 3361
Greenville 05:50:33 -55.2 Dark Down 71.7 144.5 Up 05:35:33 - 06:05:33 3334
Gimple 05:50:33 -55.2 Dark Down 71.8 144.7 Up 05:35:33 - 06:05:33 3333
Quincy 05:50:33 -55.2 Dark Down 71.9 144.1 Up 05:35:33 - 06:05:33 3312
Portola 05:50:32 -55.6 Dark Down 72.2 145.1 Up 05:35:32 - 06:05:32 3295
Niwot 05:49:38 -65.4 Dark Down 74.2 193.5 Up 05:34:38 - 06:04:38 3278
Reno 05:50:29 -56.2 Dark Down 72.7 146.3 Up 05:35:29 - 06:05:29 3262
Carson City 05:50:30 -56.3 Dark Down 73.0 145.8 Up 05:35:30 - 06:05:30 3223
Yerington 05:50:28 -56.8 Dark Down 73.5 147.1 Up 05:35:28 - 06:05:28 3198
Gardnerville 05:50:30 -56.4 Dark Down 73.3 145.4 Up 05:35:30 - 06:05:30 3197
Hawthorne 05:50:26 -57.4 Dark Down 74.1 147.8 Up 05:35:26 - 06:05:26 3144
Lee Vining 05:50:28 -57.2 Dark Down 74.3 145.3 Up 05:35:28 - 06:05:28 3087
Tonopah 05:50:21 -58.6 Dark Down 75.0 151.2 Up 05:35:21 - 06:05:21 3085
Bishop 05:50:25 -58.0 Dark Down 75.1 146.2 Up 05:35:25 - 06:05:25 3017
Beatty 05:50:20 -59.3 Dark Down 76.2 150.5 Up 05:35:20 - 06:05:20 2957
Lone Pine 05:50:25 -58.5 Dark Down 75.9 145.6 Up 05:35:25 - 06:05:25 2933
Indian Springs 05:50:16 -60.2 Dark Down 76.9 153.7 Up 05:35:16 - 06:05:16 2916
Henderson 05:50:14 -60.9 Dark Down 77.6 155.3 Up 05:35:14 - 06:05:14 2854
CPSLO 05:50:35 -56.8 Dark Down 75.6 134.5 Up 05:35:35 - 06:05:35 2812
Searchlight/Boulder City 05:50:14 -61.2 Dark Down 78.2 154.4 Up 05:35:14 - 06:05:14 2792
Patrick 05:50:09 -62.0 Dark Down 78.6 158.6 Up 05:35:09 - 06:05:09 2781
Kingman/Dolan Springs 05:50:10 -61.9 Dark Down 78.7 157.4 Up 05:35:10 - 06:05:10 2758
Laughlin/Bullhead City 05:50:12 -61.6 Dark Down 78.6 155.2 Up 05:35:12 - 06:05:12 2757
DCO 05:50:07 -62.7 Dark Down 79.0 161.2 Up 05:35:07 - 06:05:07 2745
Mohave Valley 05:50:12 -61.7 Dark Down 78.8 154.6 Up 05:35:12 - 06:05:12 2728
Lake Havasu City 05:50:11 -62.0 Dark Down 79.3 154.8 Up 05:35:11 - 06:05:11 2683
Wildwood 05:50:28 -58.8 Dark Down 77.6 137.2 Up 05:35:28 - 06:05:28 2664
Parker 05:50:11 -62.1 Dark Down 79.6 154.1 Up 05:35:11 - 06:05:11 2644
Idyllwild 05:50:21 -60.3 Dark Down 78.9 142.8 Up 05:35:21 - 06:05:21 2613
Blythe 05:50:13 -62.0 Dark Down 79.9 151.4 Up 05:35:13 - 06:05:13 2588
Calipatria 05:50:16 -61.4 Dark Down 80.0 145.8 Up 05:35:16 - 06:05:16 2539
Yuma 05:50:13 -62.3 Dark Down 80.7 148.5 Up 05:35:13 - 06:05:13 2487

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 03TK58, (2018/01/10 05:50UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 17.27 126
Alnath         05:26:17.5 +28:36:24  1.6  6.93 131
132 Tau        05:49:00.9 +24:34:03  4.9  0.64 127
PPM 095035     05:53:33.6 +24:17:13  8.1  0.55 126
PPM 094983     05:51:39.2 +24:42:18 10.2  0.05 127
03TK58         05:51:48.0 +24:39:47 15.5       127
Positions are for J2000

Event circumstances last updated at 2017/05/14 18:38:49 UT

Marc W. Buie, Southwest Research Institute

RECON