RECON: TNO occultation with 136120

Event between (136120) 03LG7 and star UC4-387-085691 with event index number of 203505

Geocentric closest approach at 2019/08/01 04:23:01 UTC

J2000 position of star is 17:51:43.1 -12:37:56
Equinox of date position of star is 17:52:42.5 -12:38:08
Stellar brightness R=15.1, use SENSEUP=128
Star is 137 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=23.6

[RECON map]
TNO is 36.7 AU from the Sun and 35.9 AU from the Earth.
The TNO is moving 16.9 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 451 seconds.
The 1-sigma cross-track error in the shadow position is 2564 km.
The sky-plane scale is 26043.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=158.5 km assuming a 5% albedo -- 9.4 sec chord
Diameter=64.7 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is 3:1EE
 
 
 
 
 
 

Star training set for 136120, (2019/08/01 04:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.7 -26:28:26  0.9 23.74 120
35Eta Oph      17:11:30.2 -15:44:52  2.6 10.48 128
PPM 233722     17:55:13.0 -11:20:24  6.5  1.42 137
PPM 233639     17:51:01.6 -12:36:49  8.1  0.44 136
PPM 233698     17:53:25.7 -12:35:32  9.8  0.15 137
136120         17:52:49.2 -12:38:09 15.1       137
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 2.0 sigma about the mid-time.
The median site spacing is 22.2 km RECON observability=0.3 and success probability=3.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:23:20 -7.0 CT Down 27.5 166.7 Low 04:08:20 - 04:38:20 4469
Tonasket 04:23:21 -7.2 CT Down 27.7 166.7 Low 04:08:21 - 04:38:21 4458
Okanogan 04:23:21 -7.3 CT Down 28.1 166.5 Low 04:08:21 - 04:38:21 4441
Brewster 04:23:22 -7.4 CT Down 28.3 166.3 Low 04:08:22 - 04:38:22 4427
Manson/Chelan 04:23:25 -7.3 CT Down 28.4 165.8 Low 04:08:25 - 04:38:25 4417
Entiat 04:23:26 -7.4 CT Down 28.6 165.7 Low 04:08:26 - 04:38:26 4406
Wenatchee 04:23:26 -7.5 CT Down 28.9 165.6 Low 04:08:26 - 04:38:26 4393
Ellensburg 04:23:26 -7.6 CT Down 29.2 165.3 Low 04:08:26 - 04:38:26 4371
Yakima 04:23:28 -7.9 CT Down 29.6 165.2 Low 04:08:28 - 04:38:28 4349
Toppenish/White Swan 04:23:27 -8.1 CT Down 29.9 165.4 Low 04:08:27 - 04:38:27 4336
Pasco 04:23:22 -8.9 CT Down 30.2 166.8 Up 04:08:22 - 04:38:22 4324
PNWRO 04:23:21 -9.1 CT Down 30.5 167.0 Up 04:08:21 - 04:38:21 4310
Goldendale 04:23:30 -8.2 CT Down 30.3 164.8 Up 04:08:30 - 04:38:30 4307
George/Umatilla 04:23:23 -8.9 CT Down 30.5 166.5 Up 04:08:23 - 04:38:23 4306
The Dalles 04:23:32 -8.1 CT Down 30.5 164.4 Up 04:08:32 - 04:38:32 4295
Maupin 04:23:32 -8.4 CT Down 30.9 164.5 Up 04:08:32 - 04:38:32 4271
Madras/Culver 04:23:33 -8.7 CT Down 31.4 164.3 Up 04:08:33 - 04:38:33 4240
Sisters 04:23:36 -8.7 CT Down 31.6 163.8 Up 04:08:36 - 04:38:36 4222
Redmond 04:23:34 -8.9 CT Down 31.7 164.2 Up 04:08:34 - 04:38:34 4219
Bend 04:23:35 -9.0 CT Down 31.9 164.0 Up 04:08:35 - 04:38:35 4207
Oregon Observatory 04:23:35 -9.0 CT Down 32.1 163.8 Up 04:08:35 - 04:38:35 4198
La Pine/Gilchrist 04:23:36 -9.1 CT Down 32.2 163.7 Up 04:08:36 - 04:38:36 4185
North Lake 04:23:34 -9.7 CT Down 32.8 164.3 Up 04:08:34 - 04:38:34 4157
Paisley 04:23:33 -10.2 CT Down 33.4 164.7 Up 04:08:33 - 04:38:33 4122
Chiloquin 04:23:40 -9.5 CT Down 33.2 163.2 Up 04:08:40 - 04:38:40 4119
Klamath Falls 04:23:40 -9.8 CT Down 33.6 163.2 Up 04:08:40 - 04:38:40 4098
Lakeview 04:23:33 -10.6 CT Down 33.9 164.8 Up 04:08:33 - 04:38:33 4090
Tulelake 04:23:39 -10.1 CT Down 33.9 163.5 Up 04:08:39 - 04:38:39 4080
Cedarville 04:23:33 -11.1 CT Down 34.6 164.9 Up 04:08:33 - 04:38:33 4048
Fall River/Burney 04:23:40 -10.7 CT Down 34.8 163.4 Up 04:08:40 - 04:38:40 4021
Susanville 04:23:37 -11.5 CT Down 35.6 164.1 Up 04:08:37 - 04:38:37 3978
Greenville 04:23:39 -11.5 CT Down 35.8 163.7 Up 04:08:39 - 04:38:39 3961
Gimple 04:23:38 -11.6 CT Down 35.8 163.8 Up 04:08:38 - 04:38:38 3960
Quincy 04:23:39 -11.6 CT Down 36.0 163.7 Up 04:08:39 - 04:38:39 3947
Portola 04:23:37 -12.0 CT Down 36.2 164.2 Up 04:08:37 - 04:38:37 3938
Reno 04:23:34 -12.5 AT Down 36.6 164.9 Up 04:08:34 - 04:38:34 3917
Carson City 04:23:34 -12.8 AT Down 36.9 164.9 Up 04:08:34 - 04:38:34 3893
Yerington 04:23:32 -13.3 AT Down 37.2 165.6 Up 04:08:32 - 04:38:32 3877
Gardnerville 04:23:35 -13.0 AT Down 37.2 164.9 Up 04:08:35 - 04:38:35 3876
Niwot 04:22:21 -20.3 Dark Down 37.2 182.4 Up 04:07:21 - 04:37:21 3856
Hawthorne 04:23:29 -13.9 AT Down 37.8 166.1 Up 04:08:29 - 04:38:29 3843
Lee Vining 04:23:32 -13.9 AT Down 38.2 165.4 Up 04:08:32 - 04:38:32 3807
Tonopah 04:23:23 -15.0 AT Down 38.5 167.8 Up 04:08:23 - 04:38:23 3804
Bishop 04:23:29 -14.7 AT Down 39.0 166.2 Up 04:08:29 - 04:38:29 3761
Beatty 04:23:21 -16.0 AT Down 39.7 168.1 Up 04:08:21 - 04:38:21 3720
Lone Pine 04:23:29 -15.4 AT Down 39.8 166.5 Up 04:08:29 - 04:38:29 3706
Indian Springs 04:23:16 -16.9 AT Down 40.2 169.4 Up 04:08:16 - 04:38:16 3690
Henderson 04:23:14 -17.7 AT Down 40.8 170.2 Up 04:08:14 - 04:38:14 3647
CPSLO 04:23:43 -14.5 AT Down 40.5 163.0 Up 04:08:43 - 04:38:43 3624
Searchlight/Boulder City 04:23:14 -18.1 Dark Down 41.4 170.2 Up 04:08:14 - 04:38:14 3606
Patrick 04:23:08 -18.7 Dark Down 41.6 171.5 Up 04:08:08 - 04:38:08 3595
Laughlin/Bullhead City 04:23:12 -18.5 Dark Down 41.7 170.6 Up 04:08:12 - 04:38:12 3581
Kingman/Dolan Springs 04:23:09 -18.8 Dark Down 41.8 171.2 Up 04:08:09 - 04:38:09 3580
DCO 04:23:05 -19.4 Dark Down 41.9 172.4 Up 04:08:05 - 04:38:05 3568
Mohave Valley 04:23:12 -18.6 Dark Down 42.0 170.5 Up 04:08:12 - 04:38:12 3561
Lake Havasu City 04:23:11 -19.1 Dark Down 42.4 170.8 Up 04:08:11 - 04:38:11 3530
Wildwood 04:23:34 -16.6 AT Down 42.1 165.3 Up 04:08:34 - 04:38:34 3525
Parker 04:23:11 -19.3 Dark Down 42.8 170.8 Up 04:08:11 - 04:38:11 3503
Idyllwild 04:23:25 -18.0 Dark Down 42.8 167.6 Up 04:08:25 - 04:38:25 3489
Blythe 04:23:13 -19.4 Dark Down 43.2 170.3 Up 04:08:13 - 04:38:13 3465
Calipatria 04:23:19 -19.2 Dark Down 43.6 169.0 Up 04:08:19 - 04:38:19 3434
Yuma 04:23:14 -20.0 Dark Down 44.1 170.1 Up 04:08:14 - 04:38:14 3395

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 136120, (2019/08/01 04:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 23.74 120
35Eta Oph      17:10:22.7 -15:43:29  2.6 10.48 128
PPM 233722     17:54:07.6 -11:20:15  6.5  1.42 137
PPM 233639     17:49:55.5 -12:36:33  8.1  0.44 136
PPM 233698     17:52:19.7 -12:35:20  9.8  0.15 137
136120         17:51:43.1 -12:37:56 15.1       137
Positions are for J2000

Event circumstances last updated at 2017/08/05 16:42:07 UT

Marc W. Buie, Southwest Research Institute

RECON