RECON: TNO occultation with 82158

Event between (82158) 01FP185 and star UC4-476-054421 with event index number of 110438

Geocentric closest approach at 2018/03/22 08:34:22 UTC

J2000 position of star is 14:40:11.0 +05:01:34
Equinox of date position of star is 14:41:01.1 +04:57:19
Stellar brightness R=16.6
Star is 151 degrees from the moon. Moon is 25% illuminated.
TNO apparent brightness V=22.0

[RECON map]
TNO is 37.0 AU from the Sun and 36.2 AU from the Earth.
The TNO is moving 20.4 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 117 seconds.
The 1-sigma cross-track error in the shadow position is 1868 km.
The sky-plane scale is 26257.2 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 17.0 sec chord
Diameter=141.6 km assuming a 30% albedo -- 7.0 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 82158, (2018/03/22 08:34UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:16:29.7 +19:05:21  0.0 15.36 136
Unukalhai      15:45:10.0 +06:22:10  2.6 16.00 157
PPM 160711     14:31:40.2 +04:41:31  6.0  2.36 149
PPM 160857     14:41:00.8 +04:59:22  8.4  0.05 151
82158          14:41:05.7 +04:56:55 16.6       151
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 5.0 sigma about the mid-time.
The median site spacing is 15.2 km RECON observability=1.0 and success probability=0.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:38:05 -39.9 Dark Down 39.2 139.8 Up 08:27:51 - 08:48:18 8090
Tonasket 08:38:04 -40.1 Dark Down 39.4 139.7 Up 08:27:51 - 08:48:18 8070
Okanogan 08:38:04 -40.5 Dark Down 39.6 139.3 Up 08:27:50 - 08:48:17 8035
Niwot 08:37:11 -44.4 Dark Down 52.0 153.3 Up 08:26:57 - 08:47:24 8034
Brewster 08:38:04 -40.7 Dark Down 39.7 138.9 Up 08:27:51 - 08:48:18 8003
Manson/Chelan 08:38:07 -41.0 Dark Down 39.7 138.4 Up 08:27:53 - 08:48:20 7969
Entiat 08:38:07 -41.2 Dark Down 39.8 138.2 Up 08:27:53 - 08:48:20 7947
Wenatchee 08:38:04 -41.5 Dark Down 39.9 137.9 Up 08:27:50 - 08:48:17 7921
Ellensburg 08:38:07 -41.9 Dark Down 40.2 137.4 Up 08:27:53 - 08:48:20 7875
Pasco 08:38:01 -42.5 Dark Down 41.4 138.7 Up 08:27:48 - 08:48:15 7870
PNWRO 08:37:59 -42.7 Dark Down 41.6 138.8 Up 08:27:45 - 08:48:12 7858
Yakima 08:38:06 -42.3 Dark Down 40.4 137.2 Up 08:27:53 - 08:48:20 7838
George/Umatilla 08:38:00 -42.8 Dark Down 41.5 138.2 Up 08:27:47 - 08:48:14 7831
Toppenish/White Swan 08:38:05 -42.5 Dark Down 40.7 137.3 Up 08:27:51 - 08:48:18 7826
Goldendale 08:38:04 -43.1 Dark Down 40.9 136.4 Up 08:27:50 - 08:48:17 7759
The Dalles 08:38:04 -43.4 Dark Down 40.9 135.9 Up 08:27:51 - 08:48:18 7723
Maupin 08:38:05 -43.8 Dark Down 41.2 135.7 Up 08:27:51 - 08:48:18 7690
Madras/Culver 08:38:03 -44.3 Dark Down 41.6 135.3 Up 08:27:50 - 08:48:17 7639
Redmond 08:38:02 -44.7 Dark Down 41.8 135.1 Up 08:27:49 - 08:48:16 7605
Sisters 08:38:05 -44.7 Dark Down 41.6 134.6 Up 08:27:51 - 08:48:18 7590
Bend 08:38:03 -44.9 Dark Down 41.9 134.8 Up 08:27:50 - 08:48:17 7579
Oregon Observatory 08:38:03 -45.1 Dark Down 41.9 134.5 Up 08:27:50 - 08:48:17 7558
La Pine/Gilchrist 08:38:03 -45.3 Dark Down 42.1 134.3 Up 08:27:50 - 08:48:17 7537
North Lake 08:38:01 -45.7 Dark Down 42.7 134.7 Up 08:27:48 - 08:48:15 7524
Paisley 08:37:58 -46.2 Dark Down 43.2 134.7 Up 08:27:45 - 08:48:12 7490
Lakeview 08:37:58 -46.6 Dark Down 43.7 134.6 Up 08:27:44 - 08:48:11 7453
Chiloquin 08:38:02 -46.4 Dark Down 42.6 133.2 Up 08:27:48 - 08:48:15 7420
Cedarville 08:37:56 -47.3 Dark Down 44.2 134.4 Up 08:27:43 - 08:48:10 7402
Klamath Falls 08:38:02 -46.8 Dark Down 42.9 133.0 Up 08:27:48 - 08:48:15 7392
Tulelake 08:38:00 -47.0 Dark Down 43.3 133.2 Up 08:27:47 - 08:48:14 7381
Fall River/Burney 08:37:58 -47.9 Dark Down 43.9 132.6 Up 08:27:45 - 08:48:12 7302
Susanville 08:37:56 -48.4 Dark Down 44.8 133.0 Up 08:27:43 - 08:48:10 7278
Greenville 08:37:56 -48.7 Dark Down 44.8 132.5 Up 08:27:43 - 08:48:10 7239
Reno 08:37:52 -49.1 Dark Down 45.8 133.3 Up 08:27:38 - 08:48:05 7238
Portola 08:37:54 -49.0 Dark Down 45.3 132.8 Up 08:27:41 - 08:48:08 7232
Tonopah 08:37:42 -50.1 Dark Down 48.3 135.3 Up 08:27:29 - 08:47:56 7231
Quincy 08:37:55 -48.9 Dark Down 44.9 132.3 Up 08:27:41 - 08:48:08 7221
Yerington 08:37:49 -49.6 Dark Down 46.6 133.7 Up 08:27:36 - 08:48:03 7220
Carson City 08:37:52 -49.5 Dark Down 46.1 133.1 Up 08:27:38 - 08:48:05 7207
Hawthorne 08:37:47 -49.9 Dark Down 47.2 134.0 Up 08:27:34 - 08:48:01 7203
Gardnerville 08:37:50 -49.7 Dark Down 46.3 133.0 Up 08:27:36 - 08:48:03 7187
DCO 08:37:24 -51.8 Dark Down 52.6 138.0 Up 08:27:11 - 08:47:38 7180
Indian Springs 08:37:34 -51.1 Dark Down 50.2 136.0 Up 08:27:21 - 08:47:48 7177
Patrick 08:37:27 -51.7 Dark Down 52.0 137.4 Up 08:27:14 - 08:47:41 7169
Henderson 08:37:31 -51.4 Dark Down 50.9 136.4 Up 08:27:17 - 08:47:44 7165
Beatty 08:37:39 -51.1 Dark Down 49.3 134.9 Up 08:27:25 - 08:47:52 7150
Kingman/Dolan Springs 08:37:28 -52.0 Dark Down 52.1 136.9 Up 08:27:14 - 08:47:41 7139
Lee Vining 08:37:46 -50.6 Dark Down 47.3 132.9 Up 08:27:32 - 08:47:59 7128
Searchlight/Boulder City 08:37:28 -52.0 Dark Down 51.4 136.0 Up 08:27:15 - 08:47:42 7118
Bishop 08:37:46 -51.0 Dark Down 48.1 133.3 Up 08:27:32 - 08:47:59 7110
Laughlin/Bullhead City 08:37:28 -52.1 Dark Down 51.8 136.2 Up 08:27:15 - 08:47:42 7110
Mohave Valley 08:37:28 -52.4 Dark Down 52.0 136.0 Up 08:27:14 - 08:47:41 7085
Lake Havasu City 08:37:25 -52.7 Dark Down 52.4 135.9 Up 08:27:11 - 08:47:38 7063
Lone Pine 08:37:41 -51.7 Dark Down 48.8 133.1 Up 08:27:28 - 08:47:55 7057
Parker 08:37:26 -53.0 Dark Down 52.7 135.7 Up 08:27:13 - 08:47:40 7034
Blythe 08:37:25 -53.6 Dark Down 52.9 134.8 Up 08:27:11 - 08:47:38 6971
Yuma 08:37:21 -54.5 Dark Down 53.5 133.8 Up 08:27:08 - 08:47:35 6886
Calipatria 08:37:26 -54.3 Dark Down 52.7 133.1 Up 08:27:13 - 08:47:40 6876
Idyllwild 08:37:30 -54.1 Dark Down 51.5 132.2 Up 08:27:17 - 08:47:44 6868
CPSLO 08:37:46 -53.4 Dark Down 48.1 128.9 Up 08:27:32 - 08:47:59 6808
Wildwood 08:37:37 -54.2 Dark Down 50.1 130.2 Up 08:27:24 - 08:47:51 6801

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 82158, (2018/03/22 08:34UT)
Object            RA         Dec     mag  sep  mel
Arcturus       14:15:38.4 +19:10:23  0.0 15.36 136
Unukalhai      15:44:16.2 +06:25:33  2.6 16.00 157
PPM 160711     14:30:45.4 +04:46:20  6.0  2.36 149
PPM 160857     14:40:06.1 +05:04:01  8.4  0.05 151
82158          14:40:11.0 +05:01:34 16.6       151
Positions are for J2000

Event circumstances last updated at 2016/09/07 16:25:33 UT

Marc W. Buie, Southwest Research Institute

RECON