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 09:06:24 UTC

J2000 position of star is 15:21:48.8 -20:25:17
Equinox of date position of star is 15:22:50.8 -20:29:05
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 9.4 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 09:09:44 -36.4 Dark Up 16.4 153.0 Really Low 08:54:44 - 09:24:44 8967
Tonasket 09:09:43 -36.7 Dark Up 16.6 153.0 Really Low 08:54:43 - 09:24:43 8955
Okanogan 09:09:45 -37.0 Dark Up 16.8 152.8 Really Low 08:54:45 - 09:24:45 8935
Brewster 09:09:46 -37.3 Dark Up 17.0 152.6 Really Low 08:54:46 - 09:24:46 8916
Manson/Chelan 09:09:51 -37.6 Dark Up 17.1 152.2 Really Low 08:54:51 - 09:24:51 8896
Entiat 09:09:49 -37.8 Dark Up 17.3 152.1 Really Low 08:54:49 - 09:24:49 8883
Wenatchee 09:09:50 -38.1 Dark Up 17.5 152.0 Really Low 08:54:50 - 09:24:50 8868
Ellensburg 09:09:53 -38.5 Dark Up 17.8 151.7 Really Low 08:54:53 - 09:24:53 8840
Pasco 09:09:47 -38.9 Dark Up 18.9 152.9 Really Low 08:54:47 - 09:24:47 8837
Niwot 09:08:48 -38.9 Dark Up 28.1 165.5 Low 08:53:48 - 09:23:48 8836
PNWRO 09:09:47 -39.0 Dark Up 19.2 153.1 Really Low 08:54:47 - 09:24:47 8829
Yakima 09:09:55 -38.9 Dark Up 18.1 151.7 Really Low 08:54:55 - 09:24:55 8818
George/Umatilla 09:09:49 -39.2 Dark Up 19.1 152.7 Really Low 08:54:49 - 09:24:49 8813
Toppenish/White Swan 09:09:52 -39.1 Dark Up 18.4 151.8 Really Low 08:54:52 - 09:24:52 8811
Goldendale 09:09:56 -39.7 Dark Up 18.7 151.3 Really Low 08:54:56 - 09:24:56 8770
The Dalles 09:09:57 -40.0 Dark Up 18.8 150.9 Really Low 08:54:57 - 09:24:57 8748
Maupin 09:09:57 -40.3 Dark Up 19.2 151.0 Really Low 08:54:57 - 09:24:57 8728
Madras/Culver 09:10:00 -40.9 Dark Up 19.7 150.8 Really Low 08:55:00 - 09:25:00 8696
Redmond 09:10:01 -41.2 Dark Up 20.0 150.7 Really Low 08:55:01 - 09:25:01 8674
Sisters 09:10:02 -41.3 Dark Up 19.8 150.4 Really Low 08:55:02 - 09:25:02 8665
Bend 09:10:00 -41.4 Dark Up 20.1 150.6 Low 08:55:00 - 09:25:00 8658
Oregon Observatory 09:10:01 -41.6 Dark Up 20.2 150.4 Low 08:55:01 - 09:25:01 8644
La Pine/Gilchrist 09:10:02 -41.8 Dark Up 20.4 150.3 Low 08:55:02 - 09:25:02 8631
North Lake 09:10:01 -42.1 Dark Up 20.9 150.8 Low 08:55:01 - 09:25:01 8622
Paisley 09:09:59 -42.5 Dark Up 21.6 151.0 Low 08:54:59 - 09:24:59 8599
Lakeview 09:09:59 -42.9 Dark Up 22.1 151.1 Low 08:54:59 - 09:24:59 8574
Chiloquin 09:10:05 -43.0 Dark Up 21.2 149.8 Low 08:55:05 - 09:25:05 8555
Cedarville 09:10:00 -43.5 Dark Up 22.7 151.1 Low 08:55:00 - 09:25:00 8539
Klamath Falls 09:10:05 -43.3 Dark Up 21.5 149.8 Low 08:55:05 - 09:25:05 8537
Tulelake 09:10:04 -43.5 Dark Up 21.9 150.0 Low 08:55:04 - 09:25:04 8529
Fall River/Burney 09:10:05 -44.3 Dark Up 22.7 149.9 Low 08:55:05 - 09:25:05 8475
Susanville 09:10:03 -44.7 Dark Up 23.5 150.5 Low 08:55:03 - 09:25:03 8457
Gimple 09:10:05 -45.0 Dark Up 23.7 150.2 Low 08:55:05 - 09:25:05 8433
Greenville 09:10:05 -45.0 Dark Up 23.6 150.1 Low 08:55:05 - 09:25:05 8431
Reno 09:10:01 -45.2 Dark Up 24.6 151.1 Low 08:55:01 - 09:25:01 8425
Portola 09:10:05 -45.2 Dark Up 24.1 150.5 Low 08:55:05 - 09:25:05 8424
Quincy 09:10:07 -45.2 Dark Up 23.8 150.1 Low 08:55:07 - 09:25:07 8418
Yerington 09:09:58 -45.5 Dark Up 25.3 151.5 Low 08:54:58 - 09:24:58 8408
Tonopah 09:09:50 -45.7 Dark Up 26.8 153.2 Low 08:54:50 - 09:24:50 8403
Carson City 09:10:02 -45.5 Dark Up 24.9 151.0 Low 08:55:02 - 09:25:02 8403
Hawthorne 09:09:56 -45.8 Dark Up 25.9 151.9 Low 08:54:56 - 09:24:56 8394
Gardnerville 09:10:02 -45.8 Dark Up 25.1 151.0 Low 08:55:02 - 09:25:02 8389
Indian Springs 09:09:44 -46.4 Dark Up 28.7 154.3 Low 08:54:44 - 09:24:44 8349
Lee Vining 09:10:00 -46.4 Dark Up 26.2 151.4 Low 08:55:00 - 09:25:00 8343
Beatty 09:09:49 -46.6 Dark Up 28.0 153.3 Low 08:54:49 - 09:24:49 8340
Henderson 09:09:41 -46.6 Dark Up 29.4 154.9 Low 08:54:41 - 09:24:41 8333
Bishop 09:09:57 -46.7 Dark Up 27.0 151.9 Low 08:54:57 - 09:24:57 8324
Patrick 09:09:36 -46.7 Dark Up 30.3 155.8 Up 08:54:36 - 09:24:36 8322
DCO 09:09:32 -46.6 Dark Up 30.9 156.5 Up 08:54:32 - 09:24:32 8321
Kingman/Dolan Springs 09:09:37 -46.9 Dark Up 30.5 155.6 Up 08:54:37 - 09:24:37 8301
Searchlight/Boulder City 09:09:41 -47.1 Dark Up 29.9 154.8 Low 08:54:41 - 09:24:41 8296
Laughlin/Bullhead City 09:09:40 -47.2 Dark Up 30.3 155.1 Up 08:54:40 - 09:24:40 8285
Lone Pine 09:09:56 -47.3 Dark Up 27.8 152.0 Low 08:54:56 - 09:24:56 8283
Mohave Valley 09:09:39 -47.4 Dark Up 30.6 155.0 Up 08:54:39 - 09:24:39 8267
Lake Havasu City 09:09:38 -47.6 Dark Up 31.0 155.1 Up 08:54:38 - 09:24:38 8247
Parker 09:09:39 -47.9 Dark Up 31.4 155.1 Up 08:54:39 - 09:24:39 8223
Blythe 09:09:42 -48.5 Dark Up 31.7 154.7 Up 08:54:42 - 09:24:42 8178
Idyllwild 09:09:52 -49.3 Dark Up 30.9 152.6 Up 08:54:52 - 09:24:52 8125
CPSLO 09:10:10 -49.4 Dark Up 27.9 149.3 Low 08:55:10 - 09:25:10 8117
Calipatria 09:09:47 -49.3 Dark Up 31.8 153.6 Up 08:54:47 - 09:24:47 8116
Yuma 09:09:43 -49.3 Dark Up 32.6 154.4 Up 08:54:43 - 09:24:43 8111
Wildwood 09:10:02 -49.7 Dark Up 29.8 150.9 Low 08:55:02 - 09:25:02 8094

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 2017/12/02 17:23:37 UT

Marc W. Buie, Southwest Research Institute

RECON