RECON: TNO occultation with 119979

Event between (119979) 02WC19 and star UC4-549-018223 with event index number of 99485

Geocentric closest approach at 2018/01/22 02:31:38 UTC

J2000 position of star is 05:42:46.1 +19:41:43
Equinox of date position of star is 05:43:47.6 +19:42:08
Stellar brightness R=15.2, use SENSEUP=128
Star is 88 degrees from the moon. Moon is 22% illuminated.
TNO apparent brightness V=21.0

[RECON map]
TNO is 40.5 AU from the Sun and 39.7 AU from the Earth.
The TNO is moving 19.9 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 769 seconds.
The 1-sigma cross-track error in the shadow position is 4097 km.
The sky-plane scale is 28828.8 km/arcsec.

The TNO has an absolute magnitude Hv=4.9
Diameter=631.0 km assuming a 5% albedo -- 31.7 sec chord
Diameter=257.6 km assuming a 30% albedo -- 13.0 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 119979, (2018/01/22 02:32UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:09.0 +07:24:32  0.4 12.65  90
Alnath         05:27:26.1 +28:37:16  1.6  9.67  85
123Zet Tau     05:38:43.5 +21:09:07  3.0  1.88  87
PPM 121323     05:44:37.2 +19:32:51  8.5  0.24  88
PPM 121293     05:43:19.7 +19:39:04  8.9  0.13  88
119979         05:43:50.2 +19:42:09 15.2        88
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 1.2 sigma about the mid-time.
The median site spacing is 22.6 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 02:34:20 -18.8 Dark Up 43.7 112.7 Up 02:19:20 - 02:49:20 11847
Tonasket 02:34:20 -18.7 Dark Up 43.8 112.5 Up 02:19:20 - 02:49:20 11825
Okanogan 02:34:22 -18.6 Dark Up 43.8 112.1 Up 02:19:22 - 02:49:22 11796
Brewster 02:34:25 -18.4 Dark Up 43.8 111.6 Up 02:19:25 - 02:49:25 11774
Manson/Chelan 02:34:25 -18.2 Dark Up 43.6 111.1 Up 02:19:25 - 02:49:25 11760
Entiat 02:34:27 -18.1 Dark Up 43.7 110.8 Up 02:19:27 - 02:49:27 11740
Wenatchee 02:34:27 -18.0 AT Up 43.7 110.5 Up 02:19:27 - 02:49:27 11718
Ellensburg 02:34:29 -17.8 AT Up 43.7 109.9 Up 02:19:29 - 02:49:29 11682
Yakima 02:34:29 -17.7 AT Up 43.8 109.6 Up 02:19:29 - 02:49:29 11644
Toppenish/White Swan 02:34:30 -17.8 AT Up 44.0 109.5 Up 02:19:30 - 02:49:30 11621
Pasco 02:34:26 -18.6 Dark Up 44.9 110.6 Up 02:19:26 - 02:49:26 11591
Goldendale 02:34:33 -17.4 AT Up 43.9 108.6 Up 02:19:33 - 02:49:33 11575
PNWRO 02:34:27 -18.7 Dark Up 45.1 110.6 Up 02:19:27 - 02:49:27 11564
George/Umatilla 02:34:27 -18.4 Dark Up 44.8 110.1 Up 02:19:27 - 02:49:27 11562
The Dalles 02:34:34 -17.1 AT Up 43.7 108.1 Up 02:19:34 - 02:49:34 11559
Maupin 02:34:34 -17.1 AT Up 43.9 107.8 Up 02:19:34 - 02:49:34 11518
Madras/Culver 02:34:37 -16.9 AT Up 44.1 107.3 Up 02:19:37 - 02:49:37 11466
Sisters 02:34:39 -16.6 AT Up 43.9 106.6 Up 02:19:39 - 02:49:39 11441
Redmond 02:34:38 -16.8 AT Up 44.2 106.9 Up 02:19:38 - 02:49:38 11433
Bend 02:34:39 -16.7 AT Up 44.1 106.6 Up 02:19:39 - 02:49:39 11414
Oregon Observatory 02:34:39 -16.6 AT Up 44.1 106.3 Up 02:19:39 - 02:49:39 11400
La Pine/Gilchrist 02:34:40 -16.5 AT Up 44.1 106.1 Up 02:19:40 - 02:49:40 11381
North Lake 02:34:39 -16.8 AT Up 44.6 106.2 Up 02:19:39 - 02:49:39 11329
Chiloquin 02:34:44 -16.0 AT Up 44.2 104.7 Up 02:19:44 - 02:49:44 11278
Paisley 02:34:40 -17.0 AT Up 45.1 106.0 Up 02:19:40 - 02:49:40 11269
Klamath Falls 02:34:44 -16.0 AT Up 44.3 104.5 Up 02:19:44 - 02:49:44 11243
Lakeview 02:34:40 -17.0 AT Up 45.3 105.7 Up 02:19:40 - 02:49:40 11216
Tulelake 02:34:45 -16.2 AT Up 44.6 104.5 Up 02:19:45 - 02:49:45 11212
Cedarville 02:34:41 -17.0 AT Up 45.6 105.2 Up 02:19:41 - 02:49:41 11149
Fall River/Burney 02:34:46 -16.0 AT Up 44.9 103.7 Up 02:19:46 - 02:49:46 11121
Susanville 02:34:45 -16.5 AT Up 45.6 103.7 Up 02:19:45 - 02:49:45 11046
Greenville 02:34:47 -16.2 AT Up 45.4 103.2 Up 02:19:47 - 02:49:47 11023
Gimple 02:34:47 -16.2 AT Up 45.5 103.2 Up 02:19:47 - 02:49:47 11022
Quincy 02:34:48 -16.1 AT Up 45.5 103.0 Up 02:19:48 - 02:49:48 11003
Portola 02:34:45 -16.5 AT Up 45.9 103.2 Up 02:19:45 - 02:49:45 10982
Reno 02:34:45 -16.9 AT Up 46.4 103.5 Up 02:19:45 - 02:49:45 10945
Carson City 02:34:46 -16.8 AT Up 46.5 103.1 Up 02:19:46 - 02:49:46 10908
Gardnerville 02:34:46 -16.8 AT Up 46.6 102.9 Up 02:19:46 - 02:49:46 10883
Yerington 02:34:44 -17.3 AT Up 47.0 103.5 Up 02:19:44 - 02:49:44 10878
Hawthorne 02:34:43 -17.6 AT Up 47.5 103.4 Up 02:19:43 - 02:49:43 10823
Niwot 02:33:54 -28.0 Dark Up 56.6 118.4 Up 02:18:54 - 02:48:54 10809
Lee Vining 02:34:45 -17.1 AT Up 47.3 102.4 Up 02:19:45 - 02:49:45 10773
Tonopah 02:34:39 -18.6 Dark Up 48.7 104.1 Up 02:19:39 - 02:49:39 10752
Bishop 02:34:45 -17.5 AT Up 48.0 102.3 Up 02:19:45 - 02:49:45 10700
Beatty 02:34:41 -18.7 Dark Up 49.3 103.1 Up 02:19:41 - 02:49:41 10626
Lone Pine 02:34:45 -17.6 AT Up 48.4 101.8 Up 02:19:45 - 02:49:45 10616
Indian Springs 02:34:37 -19.5 Dark Up 50.2 103.6 Up 02:19:37 - 02:49:37 10576
CPSLO 02:34:56 -15.3 AT Up 46.6 98.5 Up 02:19:56 - 02:49:56 10527
Henderson 02:34:35 -19.9 Dark Up 50.9 103.6 Up 02:19:35 - 02:49:35 10510
Searchlight/Boulder City 02:34:36 -19.9 Dark Up 51.1 102.9 Up 02:19:36 - 02:49:36 10449
Patrick 02:34:33 -20.7 Dark Up 51.9 103.7 Up 02:19:33 - 02:49:33 10428
Laughlin/Bullhead City 02:34:35 -20.1 Dark Up 51.4 102.8 Up 02:19:35 - 02:49:35 10413
Kingman/Dolan Springs 02:34:34 -20.5 Dark Up 51.8 103.3 Up 02:19:34 - 02:49:34 10407
DCO 02:34:30 -21.2 Dark Up 52.6 103.9 Up 02:19:30 - 02:49:30 10385
Mohave Valley 02:34:37 -20.1 Dark Up 51.5 102.5 Up 02:19:37 - 02:49:37 10384
Wildwood 02:34:53 -16.7 AT Up 48.4 98.6 Up 02:19:53 - 02:49:53 10365
Lake Havasu City 02:34:35 -20.2 Dark Up 51.8 102.2 Up 02:19:35 - 02:49:35 10338
Parker 02:34:36 -20.2 Dark Up 51.9 101.8 Up 02:19:36 - 02:49:36 10301
Idyllwild 02:34:46 -18.1 Dark Up 50.0 99.5 Up 02:19:46 - 02:49:46 10297
Blythe 02:34:39 -19.8 Dark Up 51.8 100.9 Up 02:19:39 - 02:49:39 10250
Calipatria 02:34:43 -19.0 Dark Up 51.1 99.6 Up 02:19:43 - 02:49:43 10213
Yuma 02:34:40 -19.6 Dark Up 51.9 99.7 Up 02:19:40 - 02:49:40 10153

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, (2018/01/22 02:32UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 12.65  90
Alnath         05:26:17.5 +28:36:24  1.6  9.67  85
123Zet Tau     05:37:38.7 +21:08:33  3.0  1.88  87
PPM 121323     05:43:33.2 +19:32:26  8.5  0.24  88
PPM 121293     05:42:15.6 +19:38:36  8.9  0.13  88
119979         05:42:46.1 +19:41:43 15.2        88
Positions are for J2000

Event circumstances last updated at 2017/04/24 16:16:37 UT

Marc W. Buie, Southwest Research Institute

RECON