RECON: TNO occultation with 05GC187

Event between 05GC187 and star UC4-348-075905 with event index number of 108339

Geocentric closest approach at 2018/03/27 09:06:27 UTC

J2000 position of star is 15:21:48.8 -20:25:17
Equinox of date position of star is 15:22:48.9 -20:28:58
Stellar brightness R=14.7, use SENSEUP=128
Star is 101 degrees from the moon. Moon is 79% illuminated.
TNO apparent brightness V=23.1

[RECON map]
TNO is 39.2 AU from the Sun and 38.6 AU from the Earth.
The TNO is moving 15.0 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 534 seconds.
The 1-sigma cross-track error in the shadow position is 5108 km.
The sky-plane scale is 27964.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=232.3 km assuming a 5% albedo -- 15.5 sec chord
Diameter=94.8 km assuming a 30% albedo -- 6.3 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 05GC187, (2018/03/27 09:06UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:31.7 -26:28:15  0.9 16.61 117
7Del Sco       16:01:24.9 -22:40:20  2.3  9.22 110
PPM 264334     15:31:39.7 -20:47:24  6.5  2.08 103
PPM 264102     15:20:51.3 -20:56:13  8.5  0.65 100
PPM 264138     15:22:27.1 -20:27:12  9.0  0.10 101
05GC187        15:22:51.9 -20:29:09 14.7       101
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 1.7 sigma about the mid-time.
The median site spacing is 9.5 km RECON observability=0.7 and success probability=2.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:09:46 -36.4 Dark Up 16.4 153.0 Really Low 08:54:46 - 09:24:46 8978
Tonasket 09:09:46 -36.7 Dark Up 16.6 153.0 Really Low 08:54:46 - 09:24:46 8967
Okanogan 09:09:48 -37.0 Dark Up 16.8 152.8 Really Low 08:54:48 - 09:24:48 8946
Brewster 09:09:49 -37.3 Dark Up 17.0 152.6 Really Low 08:54:49 - 09:24:49 8928
Manson/Chelan 09:09:51 -37.6 Dark Up 17.1 152.2 Really Low 08:54:51 - 09:24:51 8908
Entiat 09:09:52 -37.8 Dark Up 17.3 152.1 Really Low 08:54:52 - 09:24:52 8895
Wenatchee 09:09:52 -38.1 Dark Up 17.5 152.0 Really Low 08:54:52 - 09:24:52 8879
Ellensburg 09:09:53 -38.5 Dark Up 17.8 151.7 Really Low 08:54:53 - 09:24:53 8852
Pasco 09:09:50 -38.9 Dark Up 18.9 152.9 Really Low 08:54:50 - 09:24:50 8849
Niwot 09:08:51 -38.9 Dark Up 28.1 165.5 Low 08:53:51 - 09:23:51 8848
PNWRO 09:09:49 -39.0 Dark Up 19.2 153.1 Really Low 08:54:49 - 09:24:49 8842
Yakima 09:09:55 -38.9 Dark Up 18.1 151.7 Really Low 08:54:55 - 09:24:55 8830
George/Umatilla 09:09:51 -39.2 Dark Up 19.1 152.7 Really Low 08:54:51 - 09:24:51 8825
Toppenish/White Swan 09:09:54 -39.1 Dark Up 18.4 151.8 Really Low 08:54:54 - 09:24:54 8823
Goldendale 09:09:58 -39.7 Dark Up 18.7 151.3 Really Low 08:54:58 - 09:24:58 8782
The Dalles 09:10:00 -40.0 Dark Up 18.8 150.9 Really Low 08:55:00 - 09:25:00 8760
Maupin 09:09:59 -40.3 Dark Up 19.2 151.0 Really Low 08:54:59 - 09:24:59 8740
Madras/Culver 09:10:01 -40.9 Dark Up 19.7 150.8 Really Low 08:55:01 - 09:25:01 8708
Redmond 09:10:01 -41.2 Dark Up 20.0 150.7 Really Low 08:55:01 - 09:25:01 8687
Sisters 09:10:03 -41.3 Dark Up 19.8 150.4 Really Low 08:55:03 - 09:25:03 8678
Bend 09:10:02 -41.4 Dark Up 20.1 150.6 Low 08:55:02 - 09:25:02 8671
Oregon Observatory 09:10:04 -41.6 Dark Up 20.2 150.4 Low 08:55:04 - 09:25:04 8658
La Pine/Gilchrist 09:10:05 -41.8 Dark Up 20.4 150.3 Low 08:55:05 - 09:25:05 8644
North Lake 09:10:03 -42.1 Dark Up 20.9 150.8 Low 08:55:03 - 09:25:03 8635
Paisley 09:10:02 -42.5 Dark Up 21.6 151.0 Low 08:55:02 - 09:25:02 8612
Lakeview 09:10:02 -42.9 Dark Up 22.1 151.1 Low 08:55:02 - 09:25:02 8587
Chiloquin 09:10:08 -43.0 Dark Up 21.2 149.8 Low 08:55:08 - 09:25:08 8569
Cedarville 09:10:01 -43.5 Dark Up 22.7 151.1 Low 08:55:01 - 09:25:01 8553
Klamath Falls 09:10:07 -43.3 Dark Up 21.5 149.8 Low 08:55:07 - 09:25:07 8550
Tulelake 09:10:06 -43.5 Dark Up 21.9 150.0 Low 08:55:06 - 09:25:06 8542
Fall River/Burney 09:10:09 -44.3 Dark Up 22.7 149.9 Low 08:55:09 - 09:25:09 8489
Susanville 09:10:05 -44.7 Dark Up 23.5 150.5 Low 08:55:05 - 09:25:05 8470
Gimple 09:10:07 -45.0 Dark Up 23.7 150.2 Low 08:55:07 - 09:25:07 8447
Greenville 09:10:08 -45.0 Dark Up 23.6 150.1 Low 08:55:08 - 09:25:08 8444
Reno 09:10:02 -45.2 Dark Up 24.6 151.1 Low 08:55:02 - 09:25:02 8439
Portola 09:10:05 -45.2 Dark Up 24.1 150.5 Low 08:55:05 - 09:25:05 8438
Quincy 09:10:07 -45.2 Dark Up 23.8 150.1 Low 08:55:07 - 09:25:07 8432
Yerington 09:10:00 -45.5 Dark Up 25.3 151.6 Low 08:55:00 - 09:25:00 8422
Tonopah 09:09:52 -45.7 Dark Up 26.8 153.2 Low 08:54:52 - 09:24:52 8417
Carson City 09:10:04 -45.5 Dark Up 24.9 151.0 Low 08:55:04 - 09:25:04 8417
Hawthorne 09:09:59 -45.8 Dark Up 25.9 151.9 Low 08:54:59 - 09:24:59 8407
Gardnerville 09:10:04 -45.8 Dark Up 25.1 151.0 Low 08:55:04 - 09:25:04 8402
Indian Springs 09:09:46 -46.4 Dark Up 28.7 154.3 Low 08:54:46 - 09:24:46 8362
Lee Vining 09:10:02 -46.4 Dark Up 26.2 151.4 Low 08:55:02 - 09:25:02 8357
Beatty 09:09:51 -46.6 Dark Up 28.0 153.4 Low 08:54:51 - 09:24:51 8354
Henderson 09:09:43 -46.6 Dark Up 29.4 154.9 Low 08:54:43 - 09:24:43 8346
Bishop 09:09:59 -46.7 Dark Up 27.0 151.9 Low 08:54:59 - 09:24:59 8338
Patrick 09:09:39 -46.6 Dark Up 30.3 155.8 Up 08:54:39 - 09:24:39 8335
DCO 09:09:35 -46.6 Dark Up 30.9 156.5 Up 08:54:35 - 09:24:35 8334
Kingman/Dolan Springs 09:09:39 -46.9 Dark Up 30.5 155.6 Up 08:54:39 - 09:24:39 8315
Searchlight/Boulder City 09:09:44 -47.1 Dark Up 29.9 154.8 Low 08:54:44 - 09:24:44 8309
Laughlin/Bullhead City 09:09:43 -47.2 Dark Up 30.3 155.1 Up 08:54:43 - 09:24:43 8298
Lone Pine 09:09:58 -47.3 Dark Up 27.8 152.0 Low 08:54:58 - 09:24:58 8297
Mohave Valley 09:09:43 -47.4 Dark Up 30.6 155.0 Up 08:54:43 - 09:24:43 8280
Lake Havasu City 09:09:40 -47.6 Dark Up 31.0 155.1 Up 08:54:40 - 09:24:40 8259
Parker 09:09:41 -47.9 Dark Up 31.4 155.1 Up 08:54:41 - 09:24:41 8236
Blythe 09:09:44 -48.5 Dark Up 31.7 154.7 Up 08:54:44 - 09:24:44 8191
Idyllwild 09:09:55 -49.3 Dark Up 30.9 152.6 Up 08:54:55 - 09:24:55 8139
CPSLO 09:10:12 -49.4 Dark Up 27.9 149.3 Low 08:55:12 - 09:25:12 8131
Calipatria 09:09:49 -49.3 Dark Up 31.8 153.6 Up 08:54:49 - 09:24:49 8129
Yuma 09:09:43 -49.2 Dark Up 32.6 154.4 Up 08:54:43 - 09:24:43 8124
Wildwood 09:10:04 -49.7 Dark Up 29.8 150.9 Low 08:55:04 - 09:25:04 8108

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 05GC187, (2018/03/27 09:06UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.61 117
7Del Sco       16:00:20.0 -22:37:18  2.3  9.22 110
PPM 264334     15:30:36.3 -20:43:43  6.5  2.08 103
PPM 264102     15:19:48.1 -20:52:19  8.5  0.65 100
PPM 264138     15:21:24.0 -20:23:19  9.0  0.10 101
05GC187        15:21:48.8 -20:25:17 14.7       101
Positions are for J2000

Event circumstances last updated at 2017/05/14 18:40:07 UT

Marc W. Buie, Southwest Research Institute

RECON