RECON: TNO occultation with 05GX186

Event between 05GX186 and star UC4-442-055032 with event index number of 108341

Geocentric closest approach at 2018/04/02 11:04:26 UTC

J2000 position of star is 12:34:34.5 -01:38:12
Equinox of date position of star is 12:35:28.7 -01:44:00
Stellar brightness R=15.9, use SENSEUP=128
Star is 28 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=23.6

[RECON map]
TNO is 43.3 AU from the Sun and 42.3 AU from the Earth.
The TNO is moving 25.2 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 421 seconds.
The 1-sigma cross-track error in the shadow position is 5854 km.
The sky-plane scale is 30677.9 km/arcsec.

The TNO has an absolute magnitude Hv=7.3
Diameter=210.9 km assuming a 5% albedo -- 8.4 sec chord
Diameter=86.1 km assuming a 30% albedo -- 3.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 05GX186, (2018/04/02 11:04UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:09.4 -11:15:22  1.0 15.76  15
Vindemiatrix   13:03:05.1 +10:51:41  2.8 14.34  28
PPM 195518     12:28:47.8 -04:42:58  6.2  3.42  29
PPM 178820     12:35:19.4 -01:30:29  8.2  0.23  28
PPM 178819     12:35:07.8 -01:56:53  9.7  0.23  28
05GX186        12:35:30.8 -01:44:13 15.9        28
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 2.1 sigma about the mid-time.
The median site spacing is 11.5 km RECON observability=1.0 and success probability=1.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:03:46 -23.1 Dark Up 24.4 235.4 Low 10:48:46 - 11:18:46 10801
Tonasket 11:03:47 -23.2 Dark Up 24.5 235.5 Low 10:48:47 - 11:18:47 10792
Okanogan 11:03:46 -23.5 Dark Up 24.8 235.5 Low 10:48:46 - 11:18:46 10775
Brewster 11:03:45 -23.8 Dark Up 25.0 235.4 Low 10:48:45 - 11:18:45 10760
Manson/Chelan 11:03:45 -24.1 Dark Up 25.4 235.1 Low 10:48:45 - 11:18:45 10745
Entiat 11:03:44 -24.3 Dark Up 25.5 235.2 Low 10:48:44 - 11:18:44 10734
Wenatchee 11:03:44 -24.5 Dark Up 25.7 235.2 Low 10:48:44 - 11:18:44 10721
Ellensburg 11:03:42 -24.9 Dark Up 26.1 235.1 Low 10:48:42 - 11:18:42 10699
Pasco 11:03:37 -24.6 Dark Up 25.7 236.7 Low 10:48:37 - 11:18:37 10692
PNWRO 11:03:36 -24.6 Dark Up 25.7 237.0 Low 10:48:36 - 11:18:36 10686
Yakima 11:03:41 -25.2 Dark Up 26.3 235.3 Low 10:48:41 - 11:18:41 10680
Toppenish/White Swan 11:03:39 -25.2 Dark Up 26.4 235.5 Low 10:48:39 - 11:18:39 10674
George/Umatilla 11:03:37 -24.9 Dark Up 26.0 236.6 Low 10:48:37 - 11:18:37 10673
Goldendale 11:03:39 -25.8 Dark Up 26.9 235.3 Low 10:48:39 - 11:18:39 10641
Niwot 11:02:54 -19.2 Dark Up 19.4 250.3 Really Low 10:47:54 - 11:17:54 10625
The Dalles 11:03:38 -26.1 Dark Up 27.3 235.1 Low 10:48:38 - 11:18:38 10623
Maupin 11:03:37 -26.4 Dark Up 27.4 235.4 Low 10:48:37 - 11:18:37 10605
Madras/Culver 11:03:36 -26.7 Dark Up 27.8 235.6 Low 10:48:36 - 11:18:36 10578
Redmond 11:03:36 -27.0 Dark Up 28.0 235.7 Low 10:48:36 - 11:18:36 10560
Sisters 11:03:36 -27.2 Dark Up 28.2 235.3 Low 10:48:36 - 11:18:36 10553
Bend 11:03:33 -27.2 Dark Up 28.2 235.6 Low 10:48:33 - 11:18:33 10547
Oregon Observatory 11:03:33 -27.4 Dark Up 28.4 235.6 Low 10:48:33 - 11:18:33 10536
La Pine/Gilchrist 11:03:35 -27.5 Dark Up 28.6 235.6 Low 10:48:35 - 11:18:35 10524
North Lake 11:03:31 -27.5 Dark Up 28.4 236.4 Low 10:48:31 - 11:18:31 10515
Paisley 11:03:27 -27.6 Dark Up 28.5 236.9 Low 10:48:27 - 11:18:27 10494
Lakeview 11:03:25 -27.8 Dark Up 28.7 237.3 Low 10:48:25 - 11:18:25 10472
Chiloquin 11:03:30 -28.5 Dark Up 29.4 235.8 Low 10:48:30 - 11:18:30 10460
Klamath Falls 11:03:28 -28.6 Dark Up 29.6 236.0 Low 10:48:28 - 11:18:28 10444
Cedarville 11:03:23 -28.1 Dark Up 28.9 237.8 Low 10:48:23 - 11:18:23 10441
Tulelake 11:03:29 -28.6 Dark Up 29.5 236.4 Low 10:48:29 - 11:18:29 10436
Fall River/Burney 11:03:24 -29.2 Dark Up 30.0 236.9 Low 10:48:24 - 11:18:24 10389
Susanville 11:03:22 -29.1 Dark Up 29.8 237.9 Low 10:48:22 - 11:18:22 10370
Gimple 11:03:20 -29.4 Dark Up 30.1 237.8 Up 10:48:20 - 11:18:20 10350
Greenville 11:03:21 -29.5 Dark Up 30.2 237.7 Up 10:48:21 - 11:18:21 10349
Portola 11:03:19 -29.4 Dark Up 30.1 238.3 Up 10:48:19 - 11:18:19 10341
Reno 11:03:16 -29.1 Dark Up 29.8 239.0 Low 10:48:16 - 11:18:16 10340
Quincy 11:03:21 -29.6 Dark Up 30.3 237.8 Up 10:48:21 - 11:18:21 10337
Yerington 11:03:12 -29.0 Dark Up 29.6 239.8 Low 10:48:12 - 11:18:12 10322
Carson City 11:03:14 -29.3 Dark Up 29.9 239.2 Low 10:48:14 - 11:18:14 10320
Tonopah 11:03:06 -28.3 Dark Up 28.8 241.9 Low 10:48:06 - 11:18:06 10309
Gardnerville 11:03:13 -29.4 Dark Up 30.0 239.3 Up 10:48:13 - 11:18:13 10307
Hawthorne 11:03:09 -29.0 Dark Up 29.5 240.5 Low 10:48:09 - 11:18:09 10307
Lee Vining 11:03:09 -29.6 Dark Up 30.1 240.4 Up 10:48:09 - 11:18:09 10264
Indian Springs 11:02:58 -28.1 Dark Up 28.4 243.8 Low 10:47:58 - 11:17:58 10252
Beatty 11:03:01 -28.7 Dark Up 29.0 242.8 Low 10:48:01 - 11:18:01 10250
Bishop 11:03:06 -29.5 Dark Up 29.9 241.3 Low 10:48:06 - 11:18:06 10243
Henderson 11:02:55 -27.9 Dark Up 28.1 244.6 Low 10:47:55 - 11:17:55 10233
Patrick 11:02:51 -27.4 Dark Up 27.6 245.7 Low 10:47:51 - 11:17:51 10217
DCO 11:02:48 -27.1 Dark Up 27.2 246.4 Low 10:47:48 - 11:17:48 10212
Lone Pine 11:03:03 -29.7 Dark Up 30.1 241.9 Up 10:48:03 - 11:18:03 10205
Searchlight/Boulder City 11:02:53 -28.2 Dark Up 28.3 244.9 Low 10:47:53 - 11:17:53 10200
Kingman/Dolan Springs 11:02:51 -27.7 Dark Up 27.8 245.7 Low 10:47:51 - 11:17:51 10199
Laughlin/Bullhead City 11:02:53 -28.1 Dark Up 28.2 245.3 Low 10:47:53 - 11:17:53 10187
Mohave Valley 11:02:51 -28.2 Dark Up 28.3 245.5 Low 10:47:51 - 11:17:51 10171
Lake Havasu City 11:02:50 -28.2 Dark Up 28.3 245.8 Low 10:47:50 - 11:17:50 10151
Parker 11:02:48 -28.4 Dark Up 28.4 246.0 Low 10:47:48 - 11:17:48 10129
Blythe 11:02:46 -28.9 Dark Up 28.9 246.1 Low 10:47:46 - 11:17:46 10089
CPSLO 11:03:04 -32.2 Dark Up 32.5 240.5 Up 10:48:04 - 11:18:04 10067
Idyllwild 11:02:51 -30.3 Dark Up 30.4 244.4 Up 10:47:51 - 11:17:51 10055
Calipatria 11:02:46 -29.8 Dark Up 29.8 245.6 Low 10:47:46 - 11:17:46 10039
Wildwood 11:02:57 -31.4 Dark Up 31.6 242.8 Up 10:47:57 - 11:17:57 10036
Yuma 11:02:44 -29.3 Dark Up 29.3 246.5 Low 10:47:44 - 11:17:44 10029

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 05GX186, (2018/04/02 11:04UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 15.76  15
Vindemiatrix   13:02:10.3 +10:57:33  2.8 14.34  28
PPM 195518     12:27:51.5 -04:36:55  6.2  3.42  29
PPM 178820     12:34:23.1 -01:24:28  8.2  0.23  28
PPM 178819     12:34:11.6 -01:50:51  9.7  0.23  28
05GX186        12:34:34.5 -01:38:12 15.9        28
Positions are for J2000

Event circumstances last updated at 2017/08/01 16:36:23 UT

Marc W. Buie, Southwest Research Institute

RECON