RECON: TNO occultation with 119979

Event between (119979) 02WC19 and star UC4-550-019611 with event index number of 175354

Geocentric closest approach at 2019/01/24 02:38:52 UTC

J2000 position of star is 05:48:53.8 +19:57:11
Equinox of date position of star is 05:49:58.4 +19:57:27
Stellar brightness R=15.6, use SENSEUP=128
Star is 77 degrees from the moon. Moon is 88% illuminated.
TNO apparent brightness V=20.8

[RECON map]
TNO is 40.3 AU from the Sun and 39.5 AU from the Earth.
The TNO is moving 19.8 km/sec on the sky relative to the star, or, 2.5 arcsec/hr.
The 1-sigma error in the time of the event is 290 seconds.
The 1-sigma cross-track error in the shadow position is 1773 km.
The sky-plane scale is 28663.6 km/arcsec.

The TNO has an absolute magnitude Hv=4.7
Diameter=631.0 km assuming a 5% albedo -- 35.0 sec chord
Diameter=257.6 km assuming a 30% albedo -- 14.3 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 119979, (2019/01/24 02:39UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.3 +07:24:33  0.4 12.64  77
Alnath         05:27:29.9 +28:37:19  1.6 10.07  82
PPM 121513     05:53:31.2 +19:52:16  6.4  0.83  77
PPM 121502     05:52:59.7 +19:31:29  7.1  0.82  77
PPM 121423     05:49:58.2 +19:55:49  8.8  0.03  77
119979         05:50:01.7 +19:57:28 15.6        77
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 3.1 sigma about the mid-time.
The median site spacing is 23.0 km RECON observability=1.0 and success probability=17.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 02:41:31 -19.6 Dark Down 45.1 114.5 Up 02:26:31 - 02:56:31 3254
Tonasket 02:41:31 -19.6 Dark Down 45.2 114.3 Up 02:26:31 - 02:56:31 3232
Okanogan 02:41:33 -19.4 Dark Down 45.2 113.8 Up 02:26:33 - 02:56:33 3202
Brewster 02:41:34 -19.2 Dark Down 45.2 113.4 Up 02:26:34 - 02:56:34 3179
Manson/Chelan 02:41:36 -19.0 Dark Down 45.1 112.8 Up 02:26:36 - 02:56:36 3164
Entiat 02:41:36 -18.9 Dark Down 45.1 112.6 Up 02:26:36 - 02:56:36 3145
Wenatchee 02:41:37 -18.8 Dark Down 45.1 112.2 Up 02:26:37 - 02:56:37 3122
Ellensburg 02:41:39 -18.6 Dark Down 45.2 111.6 Up 02:26:39 - 02:56:39 3086
Yakima 02:41:40 -18.5 Dark Down 45.3 111.2 Up 02:26:40 - 02:56:40 3047
Toppenish/White Swan 02:41:40 -18.6 Dark Down 45.5 111.2 Up 02:26:40 - 02:56:40 3024
Pasco 02:41:36 -19.5 Dark Down 46.3 112.3 Up 02:26:36 - 02:56:36 2995
Goldendale 02:41:43 -18.2 Dark Down 45.4 110.3 Up 02:26:43 - 02:56:43 2977
PNWRO 02:41:36 -19.6 Dark Down 46.6 112.3 Up 02:26:36 - 02:56:36 2968
George/Umatilla 02:41:38 -19.3 Dark Down 46.3 111.8 Up 02:26:38 - 02:56:38 2966
The Dalles 02:41:44 -18.0 AT Down 45.3 109.7 Up 02:26:44 - 02:56:44 2961
Maupin 02:41:45 -18.0 AT Down 45.5 109.4 Up 02:26:45 - 02:56:45 2919
Madras/Culver 02:41:46 -17.8 AT Down 45.6 108.9 Up 02:26:46 - 02:56:46 2866
Sisters 02:41:48 -17.5 AT Down 45.4 108.1 Up 02:26:48 - 02:56:48 2841
Redmond 02:41:47 -17.7 AT Down 45.7 108.5 Up 02:26:47 - 02:56:47 2832
Bend 02:41:48 -17.6 AT Down 45.7 108.1 Up 02:26:48 - 02:56:48 2814
Oregon Observatory 02:41:49 -17.5 AT Down 45.6 107.8 Up 02:26:49 - 02:56:49 2799
La Pine/Gilchrist 02:41:50 -17.4 AT Down 45.7 107.6 Up 02:26:50 - 02:56:50 2780
North Lake 02:41:49 -17.8 AT Down 46.2 107.7 Up 02:26:49 - 02:56:49 2728
Chiloquin 02:41:53 -17.0 AT Down 45.7 106.2 Up 02:26:53 - 02:56:53 2676
Paisley 02:41:49 -17.9 AT Down 46.6 107.5 Up 02:26:49 - 02:56:49 2668
Klamath Falls 02:41:54 -17.0 AT Down 45.9 105.9 Up 02:26:54 - 02:56:54 2641
Lakeview 02:41:49 -18.0 AT Down 46.9 107.1 Up 02:26:49 - 02:56:49 2615
Tulelake 02:41:54 -17.1 AT Down 46.2 105.9 Up 02:26:54 - 02:56:54 2609
Cedarville 02:41:51 -18.0 Dark Down 47.2 106.6 Up 02:26:51 - 02:56:51 2547
Fall River/Burney 02:41:55 -17.0 AT Down 46.5 105.1 Up 02:26:55 - 02:56:55 2517
Susanville 02:41:54 -17.5 AT Down 47.2 105.1 Up 02:26:54 - 02:56:54 2442
Greenville 02:41:55 -17.2 AT Down 47.1 104.5 Up 02:26:55 - 02:56:55 2419
Gimple 02:41:56 -17.2 AT Down 47.1 104.6 Up 02:26:56 - 02:56:56 2418
Quincy 02:41:56 -17.1 AT Down 47.1 104.3 Up 02:26:56 - 02:56:56 2399
Portola 02:41:55 -17.5 AT Down 47.5 104.6 Up 02:26:55 - 02:56:55 2379
Reno 02:41:54 -17.9 AT Down 48.0 104.9 Up 02:26:54 - 02:56:54 2342
Carson City 02:41:54 -17.9 AT Down 48.2 104.5 Up 02:26:54 - 02:56:54 2305
Gardnerville 02:41:54 -17.9 AT Down 48.3 104.3 Up 02:26:54 - 02:56:54 2279
Yerington 02:41:52 -18.3 Dark Down 48.7 104.8 Up 02:26:52 - 02:56:52 2275
Niwot 02:41:01 -29.0 Dark Down 58.1 120.5 Up 02:26:01 - 02:56:01 2223
Hawthorne 02:41:52 -18.6 Dark Down 49.2 104.8 Up 02:26:52 - 02:56:52 2220
Lee Vining 02:41:54 -18.2 Dark Down 49.0 103.7 Up 02:26:54 - 02:56:54 2169
Tonopah 02:41:48 -19.6 Dark Down 50.4 105.4 Up 02:26:48 - 02:56:48 2151
Bishop 02:41:53 -18.6 Dark Down 49.7 103.6 Up 02:26:53 - 02:56:53 2097
Beatty 02:41:49 -19.8 Dark Down 51.0 104.5 Up 02:26:49 - 02:56:49 2024
Lone Pine 02:41:54 -18.7 Dark Down 50.1 103.0 Up 02:26:54 - 02:56:54 2013
Indian Springs 02:41:45 -20.6 Dark Down 51.9 105.0 Up 02:26:45 - 02:56:45 1975
CPSLO 02:42:04 -16.5 AT Down 48.3 99.6 Up 02:27:04 - 02:57:04 1920
Henderson 02:41:44 -21.1 Dark Down 52.6 104.9 Up 02:26:44 - 02:56:44 1909
Searchlight/Boulder City 02:41:44 -21.0 Dark Down 52.8 104.2 Up 02:26:44 - 02:56:44 1848
Patrick 02:41:41 -21.8 Dark Down 53.6 105.0 Up 02:26:41 - 02:56:41 1828
Laughlin/Bullhead City 02:41:44 -21.2 Dark Down 53.2 104.1 Up 02:26:44 - 02:56:44 1812
Kingman/Dolan Springs 02:41:42 -21.7 Dark Down 53.5 104.6 Up 02:26:42 - 02:56:42 1808
DCO 02:41:39 -22.4 Dark Down 54.3 105.2 Up 02:26:39 - 02:56:39 1787
Mohave Valley 02:41:44 -21.2 Dark Down 53.2 103.8 Up 02:26:44 - 02:56:44 1784
Wildwood 02:42:00 -17.8 AT Down 50.2 99.7 Up 02:27:00 - 02:57:00 1760
Lake Havasu City 02:41:44 -21.3 Dark Down 53.5 103.5 Up 02:26:44 - 02:56:44 1738
Parker 02:41:44 -21.3 Dark Down 53.6 103.0 Up 02:26:44 - 02:56:44 1700
Idyllwild 02:41:54 -19.3 Dark Down 51.8 100.6 Up 02:26:54 - 02:56:54 1692
Blythe 02:41:46 -21.0 Dark Down 53.5 102.1 Up 02:26:46 - 02:56:46 1649
Calipatria 02:41:50 -20.1 Dark Down 52.8 100.7 Up 02:26:50 - 02:56:50 1610
Yuma 02:41:47 -20.8 Dark Down 53.7 100.8 Up 02:26:47 - 02:56:47 1552

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 119979, (2019/01/24 02:39UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 12.64  77
Alnath         05:26:17.5 +28:36:24  1.6 10.07  82
PPM 121513     05:52:23.4 +19:52:04  6.4  0.83  77
PPM 121502     05:51:52.1 +19:31:17  7.1  0.82  77
PPM 121423     05:48:50.4 +19:55:32  8.8  0.03  77
119979         05:48:53.8 +19:57:11 15.6        77
Positions are for J2000

Event circumstances last updated at 2018/02/14 17:19:01 UT

Marc W. Buie, Southwest Research Institute

RECON