RECON: TNO occultation with 120178

Event between (120178) 03OP32 and star UC4-467-133271 with event index number of 203383

Geocentric closest approach at 2019/07/07 07:11:20 UTC

J2000 position of star is 22:36:50.4 +03:12:40
Equinox of date position of star is 22:37:44.0 +03:18:09
Stellar brightness R=16.6, use SENSEUP=128
Star is 164 degrees from the moon. Moon is 26% illuminated.
TNO apparent brightness V=20.3

[RECON map]
TNO is 42.4 AU from the Sun and 41.9 AU from the Earth.
The TNO is moving 12.0 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 242 seconds.
The 1-sigma cross-track error in the shadow position is 1762 km.
The sky-plane scale is 30387.1 km/arcsec.

The TNO has an absolute magnitude Hv=3.9
Diameter=1000.0 km assuming a 5% albedo -- 83.3 sec chord
Diameter=408.3 km assuming a 30% albedo -- 34.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 120178, (2019/07/07 07:11UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:58:43.4 -29:31:06  1.2 33.21 159
Markab         23:05:44.1 +15:18:38  2.5 13.83 155
37 Peg         22:30:57.1 +04:31:53  5.9  2.10 162
PPM 173268     22:39:28.9 +02:24:02  8.2  1.00 165
PPM 173222     22:36:52.5 +03:16:53 10.0  0.24 164
120178         22:37:49.9 +03:18:46 16.6       164
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 3.7 sigma about the mid-time.
The median site spacing is 21.5 km RECON observability=0.6 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:15:34 -17.7 AT Down 18.8 107.5 Really Low 07:00:34 - 07:30:34 9336
Tonasket 07:15:36 -17.9 AT Down 18.8 107.4 Really Low 07:00:36 - 07:30:36 9321
Okanogan 07:15:39 -18.2 Dark Down 18.9 107.2 Really Low 07:00:39 - 07:30:39 9301
Brewster 07:15:42 -18.5 Dark Down 18.8 106.9 Really Low 07:00:42 - 07:30:42 9286
Manson/Chelan 07:15:44 -18.6 Dark Down 18.6 106.6 Really Low 07:00:44 - 07:30:44 9276
Entiat 07:15:47 -18.8 Dark Down 18.7 106.4 Really Low 07:00:47 - 07:30:47 9262
Wenatchee 07:15:48 -19.1 Dark Down 18.7 106.3 Really Low 07:00:48 - 07:30:48 9246
Ellensburg 07:15:51 -19.4 Dark Down 18.7 106.0 Really Low 07:00:51 - 07:30:51 9221
Yakima 07:15:54 -19.8 Dark Down 18.8 105.8 Really Low 07:00:54 - 07:30:54 9195
Toppenish/White Swan 07:15:57 -20.1 Dark Down 18.9 105.9 Really Low 07:00:57 - 07:30:57 9179
Pasco 07:15:54 -20.4 Dark Down 19.8 106.9 Really Low 07:00:54 - 07:30:54 9159
Goldendale 07:16:04 -20.6 Dark Down 18.8 105.4 Really Low 07:01:04 - 07:31:04 9146
PNWRO 07:15:54 -20.7 Dark Down 20.0 107.0 Low 07:00:54 - 07:30:54 9141
George/Umatilla 07:15:56 -20.7 Dark Down 19.8 106.6 Really Low 07:00:56 - 07:30:56 9139
The Dalles 07:16:03 -20.7 Dark Down 18.6 105.1 Really Low 07:01:03 - 07:31:03 9134
Maupin 07:16:06 -21.1 Dark Down 18.8 105.0 Really Low 07:01:06 - 07:31:06 9104
Madras/Culver 07:16:09 -21.7 Dark Down 18.9 104.8 Really Low 07:01:09 - 07:31:09 9068
Sisters 07:16:13 -21.9 Dark Down 18.7 104.4 Really Low 07:01:13 - 07:31:13 9049
Redmond 07:16:13 -22.0 Dark Down 19.0 104.7 Really Low 07:01:13 - 07:31:13 9043
Bend 07:16:14 -22.2 Dark Down 19.0 104.5 Really Low 07:01:14 - 07:31:14 9030
Oregon Observatory 07:16:16 -22.4 Dark Down 18.9 104.3 Really Low 07:01:16 - 07:31:16 9019
La Pine/Gilchrist 07:16:17 -22.5 Dark Down 18.9 104.2 Really Low 07:01:17 - 07:31:17 9005
North Lake 07:16:19 -23.1 Dark Down 19.5 104.5 Really Low 07:01:19 - 07:31:19 8969
Chiloquin 07:16:25 -23.6 Dark Down 19.0 103.6 Really Low 07:01:25 - 07:31:25 8929
Paisley 07:16:22 -23.7 Dark Down 19.9 104.6 Really Low 07:01:22 - 07:31:22 8926
Klamath Falls 07:16:27 -23.9 Dark Down 19.1 103.6 Really Low 07:01:27 - 07:31:27 8904
Lakeview 07:16:24 -24.2 Dark Down 20.2 104.6 Low 07:01:24 - 07:31:24 8888
Tulelake 07:16:29 -24.2 Dark Down 19.4 103.7 Really Low 07:01:29 - 07:31:29 8881
Cedarville 07:16:27 -24.9 Dark Down 20.5 104.5 Low 07:01:27 - 07:31:27 8838
Fall River/Burney 07:16:34 -25.1 Dark Down 19.7 103.5 Really Low 07:01:34 - 07:31:34 8814
Susanville 07:16:36 -25.9 Dark Down 20.4 103.8 Low 07:01:36 - 07:31:36 8759
Greenville 07:16:39 -26.1 Dark Down 20.3 103.5 Low 07:01:39 - 07:31:39 8741
Gimple 07:16:38 -26.1 Dark Down 20.3 103.5 Low 07:01:38 - 07:31:38 8740
Quincy 07:16:41 -26.3 Dark Down 20.3 103.4 Low 07:01:41 - 07:31:41 8726
Portola 07:16:40 -26.5 Dark Down 20.7 103.7 Low 07:01:40 - 07:31:40 8712
Reno 07:16:40 -26.9 Dark Down 21.2 104.1 Low 07:01:40 - 07:31:40 8685
Carson City 07:16:41 -27.2 Dark Down 21.4 104.0 Low 07:01:41 - 07:31:41 8658
Gardnerville 07:16:46 -27.5 Dark Down 21.5 103.9 Low 07:01:46 - 07:31:46 8638
Yerington 07:16:41 -27.5 Dark Down 21.9 104.3 Low 07:01:41 - 07:31:41 8636
Hawthorne 07:16:44 -28.1 Dark Down 22.4 104.5 Low 07:01:44 - 07:31:44 8594
Niwot 07:15:43 -27.2 Dark Down 31.5 115.5 Up 07:00:43 - 07:30:43 8568
Lee Vining 07:16:47 -28.5 Dark Down 22.2 104.0 Low 07:01:47 - 07:31:47 8556
Tonopah 07:16:41 -28.7 Dark Down 23.6 105.3 Low 07:01:41 - 07:31:41 8543
Bishop 07:16:48 -29.2 Dark Down 22.9 104.2 Low 07:01:48 - 07:31:48 8500
Beatty 07:16:48 -29.9 Dark Down 24.3 105.2 Low 07:01:48 - 07:31:48 8445
Lone Pine 07:16:52 -30.0 Dark Down 23.3 104.2 Low 07:01:52 - 07:31:52 8435
Indian Springs 07:16:44 -30.4 Dark Down 25.2 105.8 Low 07:01:44 - 07:31:44 8407
CPSLO 07:17:08 -30.9 Dark Down 21.6 102.0 Low 07:02:08 - 07:32:08 8357
Henderson 07:16:45 -31.0 Dark Down 25.9 106.0 Low 07:01:45 - 07:31:45 8356
Searchlight/Boulder City 07:16:48 -31.6 Dark Down 26.1 105.8 Low 07:01:48 - 07:31:48 8308
Patrick 07:16:44 -31.7 Dark Down 26.9 106.5 Low 07:01:44 - 07:31:44 8291
Laughlin/Bullhead City 07:16:48 -31.9 Dark Down 26.4 105.9 Low 07:01:48 - 07:31:48 8279
Kingman/Dolan Springs 07:16:48 -31.9 Dark Down 26.8 106.3 Low 07:01:48 - 07:31:48 8275
DCO 07:16:44 -32.1 Dark Down 27.6 106.8 Low 07:01:44 - 07:31:44 8258
Mohave Valley 07:16:50 -32.2 Dark Down 26.5 105.8 Low 07:01:50 - 07:31:50 8256
Wildwood 07:17:09 -32.4 Dark Down 23.6 102.8 Low 07:02:09 - 07:32:09 8235
Lake Havasu City 07:16:52 -32.6 Dark Down 26.8 105.7 Low 07:01:52 - 07:31:52 8220
Parker 07:16:54 -32.9 Dark Down 27.0 105.6 Low 07:01:54 - 07:31:54 8190
Idyllwild 07:17:07 -33.1 Dark Down 25.2 103.8 Low 07:02:07 - 07:32:07 8184
Blythe 07:16:59 -33.4 Dark Down 26.9 105.2 Low 07:01:59 - 07:31:59 8149
Calipatria 07:17:05 -33.8 Dark Down 26.3 104.3 Low 07:02:05 - 07:32:05 8117
Yuma 07:17:02 -34.3 Dark Down 27.1 104.7 Low 07:02:02 - 07:32:02 8070

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 120178, (2019/07/07 07:11UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.5 -29:37:23  1.2 33.21 159
Markab         23:04:45.7 +15:12:18  2.5 13.83 155
37 Peg         22:29:57.9 +04:25:51  5.9  2.10 162
PPM 173268     22:38:29.3 +02:17:55  8.2  1.00 165
PPM 173222     22:35:53.0 +03:10:47 10.0  0.24 164
120178         22:36:50.4 +03:12:40 16.6       164
Positions are for J2000

Event circumstances last updated at 2017/08/04 18:08:45 UT

Marc W. Buie, Southwest Research Institute

RECON