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 05:52:46.0 +19:55:51
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 727 seconds.
The 1-sigma cross-track error in the shadow position is 3986 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 1.2 sigma about the mid-time.
The median site spacing is 19.5 km RECON observability=0.6 and success probability=1.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 13:09:15 -24.9 Dark Up 21.4 276.2 Low 12:54:15 - 13:24:15 10134
Tonasket 13:09:13 -24.9 Dark Up 21.3 276.3 Low 12:54:13 - 13:24:13 10117
Okanogan 13:09:13 -25.0 Dark Up 21.4 276.3 Low 12:54:13 - 13:24:13 10088
Brewster 13:09:12 -25.1 Dark Up 21.5 276.3 Low 12:54:12 - 13:24:12 10063
Manson/Chelan 13:09:11 -25.3 Dark Up 21.7 276.1 Low 12:54:11 - 13:24:11 10038
Entiat 13:09:11 -25.3 Dark Up 21.8 276.1 Low 12:54:11 - 13:24:11 10020
Wenatchee 13:09:09 -25.3 Dark Up 21.8 276.2 Low 12:54:09 - 13:24:09 9999
Ellensburg 13:09:09 -25.4 Dark Up 21.9 276.2 Low 12:54:09 - 13:24:09 9962
Pasco 13:09:06 -24.3 Dark Up 20.8 277.4 Low 12:54:06 - 13:24:06 9942
Yakima 13:09:08 -25.4 Dark Up 21.9 276.3 Low 12:54:08 - 13:24:08 9931
PNWRO 13:09:05 -24.2 Dark Up 20.7 277.7 Low 12:54:05 - 13:24:05 9930
Toppenish/White Swan 13:09:06 -25.2 Dark Up 21.7 276.5 Low 12:54:06 - 13:24:06 9918
George/Umatilla 13:09:04 -24.5 Dark Up 21.0 277.4 Low 12:54:04 - 13:24:04 9911
Goldendale 13:09:06 -25.5 Dark Up 22.0 276.4 Low 12:54:06 - 13:24:06 9865
Niwot 13:08:44 -13.0 AT Down 9.6 288.0 Really Low 12:53:44 - 13:23:44 9858
The Dalles 13:09:04 -25.7 Dark Up 22.2 276.3 Low 12:54:04 - 13:24:04 9838
Maupin 13:09:03 -25.5 Dark Up 22.1 276.5 Low 12:54:03 - 13:24:03 9808
Madras/Culver 13:09:02 -25.5 Dark Up 22.1 276.7 Low 12:54:02 - 13:24:02 9764
Redmond 13:09:00 -25.5 Dark Up 22.1 276.8 Low 12:54:00 - 13:24:00 9734
Sisters 13:09:01 -25.8 Dark Up 22.3 276.5 Low 12:54:01 - 13:24:01 9726
Bend 13:09:00 -25.6 Dark Up 22.1 276.8 Low 12:54:00 - 13:24:00 9714
Oregon Observatory 13:08:59 -25.6 Dark Up 22.2 276.8 Low 12:53:59 - 13:23:59 9696
La Pine/Gilchrist 13:08:59 -25.6 Dark Up 22.2 276.8 Low 12:53:59 - 13:23:59 9678
North Lake 13:08:57 -25.1 Dark Up 21.7 277.4 Low 12:53:57 - 13:23:57 9660
Paisley 13:08:55 -24.8 Dark Up 21.4 277.8 Low 12:53:55 - 13:23:55 9625
Lakeview 13:08:54 -24.6 Dark Up 21.2 278.1 Low 12:53:54 - 13:23:54 9589
Chiloquin 13:08:55 -25.7 Dark Up 22.4 277.0 Low 12:53:55 - 13:23:55 9579
Klamath Falls 13:08:55 -25.6 Dark Up 22.3 277.2 Low 12:53:55 - 13:23:55 9553
Cedarville 13:08:51 -24.3 Dark Up 21.0 278.5 Low 12:53:51 - 13:23:51 9541
Tulelake 13:08:54 -25.4 Dark Up 22.0 277.5 Low 12:53:54 - 13:23:54 9539
Fall River/Burney 13:08:51 -25.2 Dark Up 21.8 277.9 Low 12:53:51 - 13:23:51 9466
Susanville 13:08:48 -24.5 Dark Up 21.2 278.6 Low 12:53:48 - 13:23:48 9435
Gimple 13:08:47 -24.6 Dark Up 21.3 278.6 Low 12:53:47 - 13:23:47 9406
Greenville 13:08:49 -24.7 Dark Up 21.4 278.6 Low 12:53:49 - 13:23:49 9403
Portola 13:08:47 -24.2 Dark Up 21.0 279.0 Low 12:53:47 - 13:23:47 9390
Quincy 13:08:47 -24.6 Dark Up 21.3 278.6 Low 12:53:47 - 13:23:47 9386
Reno 13:08:46 -23.7 Dark Up 20.4 279.4 Low 12:53:46 - 13:23:46 9386
Yerington 13:08:44 -23.1 Dark Up 19.8 280.0 Really Low 12:53:44 - 13:23:44 9359
Carson City 13:08:45 -23.6 Dark Up 20.4 279.6 Low 12:53:45 - 13:23:45 9356
Tonopah 13:08:40 -21.4 Dark Up 18.2 281.4 Really Low 12:53:40 - 13:23:40 9337
Gardnerville 13:08:44 -23.5 Dark Up 20.3 279.7 Low 12:53:44 - 13:23:44 9337
Hawthorne 13:08:42 -22.6 Dark Up 19.4 280.5 Really Low 12:53:42 - 13:23:42 9335
Lee Vining 13:08:40 -22.9 Dark Up 19.6 280.4 Really Low 12:53:40 - 13:23:40 9272
Indian Springs 13:08:35 -19.9 Dark Up 16.7 282.7 Really Low 12:53:35 - 13:23:35 9257
Beatty 13:08:37 -20.8 Dark Up 17.6 282.1 Really Low 12:53:37 - 13:23:37 9252
Bishop 13:08:39 -22.2 Dark Up 19.0 281.0 Really Low 12:53:39 - 13:23:39 9243
Henderson 13:08:33 -19.2 Dark Up 16.0 283.3 Really Low 12:53:33 - 13:23:33 9233
Patrick 13:08:32 -18.2 Dark Up 15.0 284.0 Really Low 12:53:32 - 13:23:32 9213
DCO 13:08:31 -17.5 AT Up 14.4 284.5 Really Low 12:53:31 - 13:23:31 9209
Kingman/Dolan Springs 13:08:31 -18.3 Dark Up 15.1 284.0 Really Low 12:53:31 - 13:23:31 9188
Lone Pine 13:08:36 -21.7 Dark Up 18.6 281.4 Really Low 12:53:36 - 13:23:36 9187
Searchlight/Boulder City 13:08:33 -19.0 Dark Up 15.9 283.5 Really Low 12:53:33 - 13:23:33 9185
Laughlin/Bullhead City 13:08:31 -18.7 Dark Up 15.5 283.7 Really Low 12:53:31 - 13:23:31 9170
Mohave Valley 13:08:30 -18.6 Dark Up 15.4 283.8 Really Low 12:53:30 - 13:23:30 9147
Lake Havasu City 13:08:29 -18.3 Dark Up 15.2 284.0 Really Low 12:53:29 - 13:23:29 9120
Parker 13:08:29 -18.2 Dark Up 15.0 284.1 Really Low 12:53:29 - 13:23:29 9090
Blythe 13:08:27 -18.3 Dark Up 15.2 284.1 Really Low 12:53:27 - 13:23:27 9034
CPSLO 13:08:35 -23.5 Dark Up 20.4 280.5 Low 12:53:35 - 13:23:35 8994
Idyllwild 13:08:28 -20.0 Dark Up 16.9 283.0 Really Low 12:53:28 - 13:23:28 8978
Calipatria 13:08:27 -18.9 Dark Up 15.8 283.8 Really Low 12:53:27 - 13:23:27 8961
Yuma 13:08:25 -18.0 Dark Up 15.0 284.3 Really Low 12:53:25 - 13:23:25 8951
Wildwood 13:08:31 -21.6 Dark Up 18.5 282.0 Really Low 12:53:31 - 13:23:31 8950

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 2017/12/05 19:07:39 UT

Marc W. Buie, Southwest Research Institute

RECON