RECON: TNO occultation with 119979

Event between (119979) 02WC19 and star UC4-550-020129 with event index number of 170215

Geocentric closest approach at 2018/12/21 13:11:56 UTC

J2000 position of star is 05:51:42.1 +19:55:39
Equinox of date position of star is 05:52:42.7 +19:55:50
Stellar brightness R=16.0, use SENSEUP=128
Star is 15 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=20.9

[RECON map]
TNO is 40.3 AU from the Sun and 39.4 AU from the Earth.
The TNO is moving 25.4 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 591 seconds.
The 1-sigma cross-track error in the shadow position is 3338 km.
The sky-plane scale is 28546.4 km/arcsec.

The TNO has an absolute magnitude Hv=4.9
Diameter=631.0 km assuming a 5% albedo -- 24.8 sec chord
Diameter=257.6 km assuming a 30% albedo -- 10.1 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 119979, (2018/12/21 13:12UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.0 +07:24:33  0.4 12.55  20
Alnath         05:27:29.6 +28:37:18  1.6 10.43  13
PPM 121513     05:53:30.9 +19:52:16  6.4  0.17  15
PPM 121478     05:52:09.9 +19:52:25  8.7  0.17  14
119979         05:52:49.7 +19:55:52 16.0        15
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 1.5 sigma about the mid-time.
The median site spacing is 19.7 km RECON observability=0.6 and success probability=1.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 13:09:14 -24.9 Dark Up 21.4 276.2 Low 12:54:14 - 13:24:14 10141
Tonasket 13:09:13 -24.9 Dark Up 21.3 276.3 Low 12:54:13 - 13:24:13 10124
Okanogan 13:09:13 -25.0 Dark Up 21.4 276.3 Low 12:54:13 - 13:24:13 10096
Brewster 13:09:12 -25.1 Dark Up 21.5 276.3 Low 12:54:12 - 13:24:12 10071
Manson/Chelan 13:09:12 -25.3 Dark Up 21.7 276.1 Low 12:54:12 - 13:24:12 10046
Entiat 13:09:11 -25.3 Dark Up 21.8 276.1 Low 12:54:11 - 13:24:11 10028
Wenatchee 13:09:10 -25.3 Dark Up 21.8 276.2 Low 12:54:10 - 13:24:10 10006
Ellensburg 13:09:09 -25.4 Dark Up 21.9 276.2 Low 12:54:09 - 13:24:09 9970
Pasco 13:09:06 -24.3 Dark Up 20.8 277.4 Low 12:54:06 - 13:24:06 9950
Yakima 13:09:07 -25.4 Dark Up 21.9 276.3 Low 12:54:07 - 13:24:07 9938
PNWRO 13:09:05 -24.2 Dark Up 20.7 277.7 Low 12:54:05 - 13:24:05 9937
Toppenish/White Swan 13:09:06 -25.2 Dark Up 21.7 276.5 Low 12:54:06 - 13:24:06 9926
George/Umatilla 13:09:04 -24.5 Dark Up 21.0 277.4 Low 12:54:04 - 13:24:04 9919
Goldendale 13:09:06 -25.5 Dark Up 22.0 276.4 Low 12:54:06 - 13:24:06 9873
Niwot 13:08:44 -13.0 AT Down 9.6 288.0 Really Low 12:53:44 - 13:23:44 9868
The Dalles 13:09:05 -25.7 Dark Up 22.2 276.3 Low 12:54:05 - 13:24:05 9845
Maupin 13:09:03 -25.5 Dark Up 22.1 276.5 Low 12:54:03 - 13:24:03 9816
Madras/Culver 13:09:02 -25.5 Dark Up 22.1 276.7 Low 12:54:02 - 13:24:02 9772
Redmond 13:09:00 -25.5 Dark Up 22.1 276.8 Low 12:54:00 - 13:24:00 9743
Sisters 13:09:01 -25.8 Dark Up 22.3 276.5 Low 12:54:01 - 13:24:01 9734
Bend 13:09:00 -25.6 Dark Up 22.1 276.8 Low 12:54:00 - 13:24:00 9722
Oregon Observatory 13:08:59 -25.6 Dark Up 22.2 276.8 Low 12:53:59 - 13:23:59 9705
La Pine/Gilchrist 13:08:59 -25.6 Dark Up 22.2 276.8 Low 12:53:59 - 13:23:59 9687
North Lake 13:08:57 -25.1 Dark Up 21.7 277.4 Low 12:53:57 - 13:23:57 9668
Paisley 13:08:55 -24.8 Dark Up 21.4 277.8 Low 12:53:55 - 13:23:55 9634
Lakeview 13:08:54 -24.6 Dark Up 21.2 278.1 Low 12:53:54 - 13:23:54 9598
Chiloquin 13:08:55 -25.7 Dark Up 22.4 277.0 Low 12:53:55 - 13:23:55 9587
Klamath Falls 13:08:54 -25.6 Dark Up 22.3 277.2 Low 12:53:54 - 13:23:54 9561
Cedarville 13:08:51 -24.3 Dark Up 21.0 278.5 Low 12:53:51 - 13:23:51 9550
Tulelake 13:08:54 -25.4 Dark Up 22.0 277.5 Low 12:53:54 - 13:23:54 9548
Fall River/Burney 13:08:51 -25.2 Dark Up 21.8 277.9 Low 12:53:51 - 13:23:51 9475
Susanville 13:08:48 -24.5 Dark Up 21.2 278.6 Low 12:53:48 - 13:23:48 9444
Gimple 13:08:47 -24.6 Dark Up 21.3 278.6 Low 12:53:47 - 13:23:47 9414
Greenville 13:08:48 -24.7 Dark Up 21.4 278.6 Low 12:53:48 - 13:23:48 9412
Portola 13:08:47 -24.2 Dark Up 21.0 279.0 Low 12:53:47 - 13:23:47 9399
Quincy 13:08:47 -24.6 Dark Up 21.3 278.6 Low 12:53:47 - 13:23:47 9395
Reno 13:08:45 -23.7 Dark Up 20.4 279.4 Low 12:53:45 - 13:23:45 9395
Yerington 13:08:43 -23.1 Dark Up 19.8 280.0 Really Low 12:53:43 - 13:23:43 9368
Carson City 13:08:44 -23.6 Dark Up 20.4 279.6 Low 12:53:44 - 13:23:44 9366
Tonopah 13:08:40 -21.4 Dark Up 18.2 281.4 Really Low 12:53:40 - 13:23:40 9347
Gardnerville 13:08:44 -23.5 Dark Up 20.3 279.7 Low 12:53:44 - 13:23:44 9346
Hawthorne 13:08:42 -22.6 Dark Up 19.4 280.5 Really Low 12:53:42 - 13:23:42 9344
Lee Vining 13:08:40 -22.9 Dark Up 19.6 280.4 Really Low 12:53:40 - 13:23:40 9282
Indian Springs 13:08:35 -19.9 Dark Up 16.7 282.7 Really Low 12:53:35 - 13:23:35 9267
Beatty 13:08:36 -20.8 Dark Up 17.6 282.1 Really Low 12:53:36 - 13:23:36 9262
Bishop 13:08:39 -22.2 Dark Up 19.0 281.0 Really Low 12:53:39 - 13:23:39 9252
Henderson 13:08:33 -19.2 Dark Up 16.0 283.3 Really Low 12:53:33 - 13:23:33 9242
Patrick 13:08:32 -18.2 Dark Up 15.0 284.0 Really Low 12:53:32 - 13:23:32 9223
DCO 13:08:31 -17.5 AT Up 14.4 284.5 Really Low 12:53:31 - 13:23:31 9218
Kingman/Dolan Springs 13:08:31 -18.3 Dark Up 15.1 284.0 Really Low 12:53:31 - 13:23:31 9198
Lone Pine 13:08:36 -21.7 Dark Up 18.6 281.4 Really Low 12:53:36 - 13:23:36 9197
Searchlight/Boulder City 13:08:32 -19.0 Dark Up 15.9 283.5 Really Low 12:53:32 - 13:23:32 9195
Laughlin/Bullhead City 13:08:31 -18.7 Dark Up 15.5 283.7 Really Low 12:53:31 - 13:23:31 9179
Mohave Valley 13:08:30 -18.6 Dark Up 15.4 283.8 Really Low 12:53:30 - 13:23:30 9156
Lake Havasu City 13:08:29 -18.3 Dark Up 15.2 284.0 Really Low 12:53:29 - 13:23:29 9129
Parker 13:08:28 -18.2 Dark Up 15.0 284.1 Really Low 12:53:28 - 13:23:28 9099
Blythe 13:08:27 -18.3 Dark Up 15.2 284.1 Really Low 12:53:27 - 13:23:27 9044
CPSLO 13:08:35 -23.5 Dark Up 20.4 280.5 Low 12:53:35 - 13:23:35 9003
Idyllwild 13:08:28 -20.0 Dark Up 16.9 283.0 Really Low 12:53:28 - 13:23:28 8988
Calipatria 13:08:27 -18.9 Dark Up 15.8 283.8 Really Low 12:53:27 - 13:23:27 8970
Yuma 13:08:25 -18.0 Dark Up 15.0 284.3 Really Low 12:53:25 - 13:23:25 8960
Wildwood 13:08:30 -21.6 Dark Up 18.5 282.0 Really Low 12:53:30 - 13:23:30 8960

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, (2018/12/21 13:12UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 12.55  20
Alnath         05:26:17.5 +28:36:24  1.6 10.43  13
PPM 121513     05:52:23.4 +19:52:04  6.4  0.17  15
PPM 121478     05:51:02.4 +19:52:11  8.7  0.17  14
119979         05:51:42.1 +19:55:39 16.0        15
Positions are for J2000

Event circumstances last updated at 2017/01/01 19:05:48 UT

Marc W. Buie, Southwest Research Institute

RECON