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 08:34:20 UTC

J2000 position of star is 14:40:11.0 +05:01:34
Equinox of date position of star is 14:41:04.8 +04:57:00
Stellar brightness R=16.6, use SENSEUP=128
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 175 seconds.
The 1-sigma cross-track error in the shadow position is 2582 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       14:16:29.6 +19:05:18  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 5.1 sigma about the mid-time.
The median site spacing is 14.8 km RECON observability=1.0 and success probability=1.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 08:38:02 -39.9 Dark Down 39.2 139.8 Up 08:23:02 - 08:53:02 8079
Tonasket 08:38:04 -40.1 Dark Down 39.4 139.7 Up 08:23:04 - 08:53:04 8058
Okanogan 08:38:02 -40.5 Dark Down 39.6 139.3 Up 08:23:02 - 08:53:02 8023
Niwot 08:37:12 -44.4 Dark Down 52.0 153.3 Up 08:22:12 - 08:52:12 8018
Brewster 08:38:05 -40.7 Dark Down 39.7 138.9 Up 08:23:05 - 08:53:05 7991
Manson/Chelan 08:38:05 -41.0 Dark Down 39.7 138.4 Up 08:23:05 - 08:53:05 7957
Entiat 08:38:05 -41.2 Dark Down 39.8 138.2 Up 08:23:05 - 08:53:05 7935
Wenatchee 08:38:05 -41.5 Dark Down 39.9 137.9 Up 08:23:05 - 08:53:05 7909
Ellensburg 08:38:05 -41.9 Dark Down 40.2 137.4 Up 08:23:05 - 08:53:05 7863
Pasco 08:38:00 -42.5 Dark Down 41.3 138.6 Up 08:23:00 - 08:53:00 7857
PNWRO 08:38:00 -42.7 Dark Down 41.6 138.8 Up 08:23:00 - 08:53:00 7845
Yakima 08:38:05 -42.3 Dark Down 40.4 137.2 Up 08:23:05 - 08:53:05 7826
George/Umatilla 08:38:01 -42.8 Dark Down 41.5 138.2 Up 08:23:01 - 08:53:01 7818
Toppenish/White Swan 08:38:04 -42.5 Dark Down 40.7 137.2 Up 08:23:04 - 08:53:04 7814
Goldendale 08:38:02 -43.1 Dark Down 40.9 136.4 Up 08:23:02 - 08:53:02 7747
The Dalles 08:38:05 -43.4 Dark Down 40.9 135.9 Up 08:23:05 - 08:53:05 7711
Maupin 08:38:02 -43.8 Dark Down 41.2 135.7 Up 08:23:02 - 08:53:02 7678
Madras/Culver 08:38:04 -44.3 Dark Down 41.6 135.3 Up 08:23:04 - 08:53:04 7627
Redmond 08:38:04 -44.7 Dark Down 41.8 135.1 Up 08:23:04 - 08:53:04 7592
Sisters 08:38:04 -44.7 Dark Down 41.6 134.6 Up 08:23:04 - 08:53:04 7577
Bend 08:38:04 -44.9 Dark Down 41.9 134.8 Up 08:23:04 - 08:53:04 7567
Oregon Observatory 08:38:04 -45.1 Dark Down 41.9 134.5 Up 08:23:04 - 08:53:04 7545
La Pine/Gilchrist 08:38:04 -45.3 Dark Down 42.1 134.3 Up 08:23:04 - 08:53:04 7524
North Lake 08:38:00 -45.7 Dark Down 42.7 134.7 Up 08:23:00 - 08:53:00 7511
Paisley 08:37:59 -46.2 Dark Down 43.2 134.8 Up 08:22:59 - 08:52:59 7477
Lakeview 08:37:57 -46.6 Dark Down 43.7 134.6 Up 08:22:57 - 08:52:57 7440
Chiloquin 08:38:03 -46.4 Dark Down 42.6 133.2 Up 08:23:03 - 08:53:03 7407
Cedarville 08:37:57 -47.3 Dark Down 44.3 134.4 Up 08:22:57 - 08:52:57 7388
Klamath Falls 08:38:00 -46.8 Dark Down 42.9 133.0 Up 08:23:00 - 08:53:00 7379
Tulelake 08:38:00 -47.0 Dark Down 43.3 133.2 Up 08:23:00 - 08:53:00 7368
Fall River/Burney 08:38:00 -47.9 Dark Down 43.9 132.6 Up 08:23:00 - 08:53:00 7289
Susanville 08:37:56 -48.4 Dark Down 44.8 133.0 Up 08:22:56 - 08:52:56 7265
Gimple 08:37:55 -48.7 Dark Down 44.8 132.6 Up 08:22:55 - 08:52:55 7230
Greenville 08:37:56 -48.7 Dark Down 44.8 132.5 Up 08:22:56 - 08:52:56 7226
Reno 08:37:53 -49.1 Dark Down 45.8 133.3 Up 08:22:53 - 08:52:53 7225
Portola 08:37:54 -49.0 Dark Down 45.3 132.8 Up 08:22:54 - 08:52:54 7218
Tonopah 08:37:42 -50.1 Dark Down 48.3 135.3 Up 08:22:42 - 08:52:42 7216
Quincy 08:37:55 -48.9 Dark Down 44.9 132.3 Up 08:22:55 - 08:52:55 7208
Yerington 08:37:48 -49.6 Dark Down 46.5 133.7 Up 08:22:48 - 08:52:48 7206
Carson City 08:37:53 -49.5 Dark Down 46.1 133.1 Up 08:22:53 - 08:52:53 7193
Hawthorne 08:37:47 -49.9 Dark Down 47.2 134.0 Up 08:22:47 - 08:52:47 7189
Gardnerville 08:37:50 -49.7 Dark Down 46.3 133.0 Up 08:22:50 - 08:52:50 7173
DCO 08:37:25 -51.8 Dark Down 52.6 138.1 Up 08:22:25 - 08:52:25 7165
Indian Springs 08:37:35 -51.1 Dark Down 50.2 136.0 Up 08:22:35 - 08:52:35 7162
Patrick 08:37:25 -51.7 Dark Down 52.0 137.4 Up 08:22:25 - 08:52:25 7154
Henderson 08:37:31 -51.4 Dark Down 50.9 136.4 Up 08:22:31 - 08:52:31 7150
Beatty 08:37:39 -51.1 Dark Down 49.3 134.9 Up 08:22:39 - 08:52:39 7135
Kingman/Dolan Springs 08:37:27 -52.0 Dark Down 52.1 136.9 Up 08:22:27 - 08:52:27 7124
Lee Vining 08:37:47 -50.6 Dark Down 47.3 132.9 Up 08:22:47 - 08:52:47 7114
Searchlight/Boulder City 08:37:28 -52.0 Dark Down 51.4 136.0 Up 08:22:28 - 08:52:28 7102
Bishop 08:37:44 -51.0 Dark Down 48.1 133.3 Up 08:22:44 - 08:52:44 7095
Laughlin/Bullhead City 08:37:28 -52.1 Dark Down 51.8 136.2 Up 08:22:28 - 08:52:28 7094
Mohave Valley 08:37:28 -52.4 Dark Down 52.0 136.0 Up 08:22:28 - 08:52:28 7070
Lake Havasu City 08:37:25 -52.7 Dark Down 52.4 135.9 Up 08:22:25 - 08:52:25 7048
Lone Pine 08:37:42 -51.7 Dark Down 48.8 133.1 Up 08:22:42 - 08:52:42 7043
Parker 08:37:24 -53.0 Dark Down 52.7 135.6 Up 08:22:24 - 08:52:24 7018
Blythe 08:37:26 -53.6 Dark Down 52.9 134.8 Up 08:22:26 - 08:52:26 6955
Yuma 08:37:22 -54.5 Dark Down 53.5 133.8 Up 08:22:22 - 08:52:22 6871
Calipatria 08:37:25 -54.3 Dark Down 52.7 133.1 Up 08:22:25 - 08:52:25 6861
Idyllwild 08:37:30 -54.1 Dark Down 51.5 132.2 Up 08:22:30 - 08:52:30 6852
CPSLO 08:37:47 -53.4 Dark Down 48.1 128.9 Up 08:22:47 - 08:52:47 6794
Wildwood 08:37:39 -54.2 Dark Down 50.1 130.2 Up 08:22:39 - 08:52:39 6786

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       14:15:38.3 +19:10:21  0.0 15.36 136
Unukalhai      15:44:16.3 +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 2017/12/02 17:22:28 UT

Marc W. Buie, Southwest Research Institute

RECON