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 05:43:49.7 +19:42:09
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 929 seconds.
The 1-sigma cross-track error in the shadow position is 4857 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 1.0 sigma about the mid-time.
The median site spacing is 22.5 km RECON observability=1.0 and success probability=2.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 02:34:22 -18.8 Dark Up 43.7 112.7 Up 02:19:22 - 02:49:22 11851
Tonasket 02:34:23 -18.8 Dark Up 43.8 112.5 Up 02:19:23 - 02:49:23 11829
Okanogan 02:34:23 -18.6 Dark Up 43.8 112.1 Up 02:19:23 - 02:49:23 11800
Brewster 02:34:24 -18.4 Dark Up 43.8 111.6 Up 02:19:24 - 02:49:24 11778
Manson/Chelan 02:34:27 -18.2 Dark Up 43.6 111.1 Up 02:19:27 - 02:49:27 11764
Entiat 02:34:27 -18.1 Dark Up 43.7 110.8 Up 02:19:27 - 02:49:27 11744
Wenatchee 02:34:28 -18.0 AT Up 43.7 110.5 Up 02:19:28 - 02:49:28 11722
Ellensburg 02:34:29 -17.8 AT Up 43.7 109.9 Up 02:19:29 - 02:49:29 11686
Yakima 02:34:31 -17.7 AT Up 43.8 109.6 Up 02:19:31 - 02:49:31 11648
Toppenish/White Swan 02:34:31 -17.8 AT Up 44.0 109.5 Up 02:19:31 - 02:49:31 11625
Pasco 02:34:28 -18.6 Dark Up 44.9 110.6 Up 02:19:28 - 02:49:28 11595
Goldendale 02:34:34 -17.4 AT Up 43.9 108.6 Up 02:19:34 - 02:49:34 11579
PNWRO 02:34:27 -18.7 Dark Up 45.1 110.6 Up 02:19:27 - 02:49:27 11568
George/Umatilla 02:34:29 -18.4 Dark Up 44.8 110.1 Up 02:19:29 - 02:49:29 11566
The Dalles 02:34:35 -17.1 AT Up 43.7 108.1 Up 02:19:35 - 02:49:35 11564
Maupin 02:34:36 -17.1 AT Up 43.9 107.8 Up 02:19:36 - 02:49:36 11522
Madras/Culver 02:34:37 -16.9 AT Up 44.1 107.3 Up 02:19:37 - 02:49:37 11470
Sisters 02:34:39 -16.6 AT Up 43.9 106.6 Up 02:19:39 - 02:49:39 11445
Redmond 02:34:38 -16.8 AT Up 44.2 106.9 Up 02:19:38 - 02:49:38 11437
Bend 02:34:39 -16.7 AT Up 44.1 106.6 Up 02:19:39 - 02:49:39 11418
Oregon Observatory 02:34:41 -16.6 AT Up 44.1 106.3 Up 02:19:41 - 02:49:41 11403
La Pine/Gilchrist 02:34:41 -16.5 AT Up 44.1 106.1 Up 02:19:41 - 02:49:41 11385
North Lake 02:34:40 -16.8 AT Up 44.7 106.2 Up 02:19:40 - 02:49:40 11333
Chiloquin 02:34:45 -16.0 AT Up 44.2 104.7 Up 02:19:45 - 02:49:45 11282
Paisley 02:34:40 -17.0 AT Up 45.1 106.0 Up 02:19:40 - 02:49:40 11273
Klamath Falls 02:34:45 -16.0 AT Up 44.3 104.5 Up 02:19:45 - 02:49:45 11248
Lakeview 02:34:41 -17.0 AT Up 45.3 105.7 Up 02:19:41 - 02:49:41 11220
Tulelake 02:34:45 -16.2 AT Up 44.6 104.5 Up 02:19:45 - 02:49:45 11216
Cedarville 02:34:42 -17.0 AT Up 45.6 105.2 Up 02:19:42 - 02:49:42 11152
Fall River/Burney 02:34:47 -16.0 AT Up 44.9 103.7 Up 02:19:47 - 02:49:47 11125
Susanville 02:34:45 -16.5 AT Up 45.6 103.7 Up 02:19:45 - 02:49:45 11050
Greenville 02:34:48 -16.2 AT Up 45.4 103.2 Up 02:19:48 - 02:49:48 11027
Gimple 02:34:48 -16.2 AT Up 45.5 103.2 Up 02:19:48 - 02:49:48 11026
Quincy 02:34:48 -16.1 AT Up 45.5 103.0 Up 02:19:48 - 02:49:48 11007
Portola 02:34:47 -16.5 AT Up 45.9 103.2 Up 02:19:47 - 02:49:47 10986
Reno 02:34:45 -16.9 AT Up 46.4 103.5 Up 02:19:45 - 02:49:45 10949
Carson City 02:34:46 -16.8 AT Up 46.5 103.1 Up 02:19:46 - 02:49:46 10912
Gardnerville 02:34:47 -16.8 AT Up 46.6 102.9 Up 02:19:47 - 02:49:47 10887
Yerington 02:34:44 -17.3 AT Up 47.0 103.5 Up 02:19:44 - 02:49:44 10882
Hawthorne 02:34:43 -17.6 AT Up 47.5 103.4 Up 02:19:43 - 02:49:43 10826
Niwot 02:33:54 -28.0 Dark Up 56.6 118.4 Up 02:18:54 - 02:48:54 10810
Lee Vining 02:34:47 -17.1 AT Up 47.3 102.4 Up 02:19:47 - 02:49:47 10777
Tonopah 02:34:41 -18.6 Dark Up 48.7 104.1 Up 02:19:41 - 02:49:41 10756
Bishop 02:34:46 -17.5 AT Up 48.0 102.4 Up 02:19:46 - 02:49:46 10704
Beatty 02:34:40 -18.7 Dark Up 49.3 103.1 Up 02:19:40 - 02:49:40 10630
Lone Pine 02:34:45 -17.6 AT Up 48.4 101.8 Up 02:19:45 - 02:49:45 10621
Indian Springs 02:34:38 -19.5 Dark Up 50.2 103.6 Up 02:19:38 - 02:49:38 10580
CPSLO 02:34:57 -15.3 AT Up 46.6 98.5 Up 02:19:57 - 02:49:57 10532
Henderson 02:34:38 -20.0 Dark Up 50.9 103.6 Up 02:19:38 - 02:49:38 10514
Searchlight/Boulder City 02:34:37 -19.9 Dark Up 51.1 102.9 Up 02:19:37 - 02:49:37 10453
Patrick 02:34:34 -20.7 Dark Up 51.9 103.7 Up 02:19:34 - 02:49:34 10431
Laughlin/Bullhead City 02:34:36 -20.1 Dark Up 51.4 102.8 Up 02:19:36 - 02:49:36 10417
Kingman/Dolan Springs 02:34:35 -20.5 Dark Up 51.8 103.3 Up 02:19:35 - 02:49:35 10411
DCO 02:34:31 -21.2 Dark Up 52.6 103.9 Up 02:19:31 - 02:49:31 10389
Mohave Valley 02:34:37 -20.1 Dark Up 51.5 102.5 Up 02:19:37 - 02:49:37 10388
Wildwood 02:34:53 -16.7 AT Up 48.4 98.6 Up 02:19:53 - 02:49:53 10370
Lake Havasu City 02:34:37 -20.2 Dark Up 51.8 102.2 Up 02:19:37 - 02:49:37 10342
Parker 02:34:38 -20.2 Dark Up 51.9 101.8 Up 02:19:38 - 02:49:38 10305
Idyllwild 02:34:46 -18.1 Dark Up 50.0 99.5 Up 02:19:46 - 02:49:46 10301
Blythe 02:34:39 -19.8 Dark Up 51.7 100.9 Up 02:19:39 - 02:49:39 10254
Calipatria 02:34:45 -19.0 Dark Up 51.1 99.7 Up 02:19:45 - 02:49:45 10217
Yuma 02:34:41 -19.6 Dark Up 51.9 99.8 Up 02:19:41 - 02:49:41 10158

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 2017/12/04 18:40:21 UT

Marc W. Buie, Southwest Research Institute

RECON