RECON: TNO occultation with 04HX78

Event between 04HX78 and star GA0740:08166164 with event index number of 189851

Geocentric closest approach at 2019/06/01 06:35:57 UTC

J2000 position of star is 17:26:48.2 -14:00:56
Equinox of date position of star is 17:27:52.0 -14:01:50
Stellar brightness G=11.4, use SENSEUP=8
Star is 142 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=23.3

[RECON map]
TNO is 33.5 AU from the Sun and 32.6 AU from the Earth.
The TNO is moving 23.5 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 411 seconds.
The 1-sigma cross-track error in the shadow position is 2651 km.
The sky-plane scale is 23610.9 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=143.9 km assuming a 5% albedo -- 6.1 sec chord
Diameter=58.7 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 04HX78, (2019/06/01 06:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.1 -26:28:24  0.9 18.29 153
35Eta Oph      17:11:29.6 -15:44:52  2.6  4.32 146
53Nu Ser       17:21:55.2 -12:51:54  4.0  1.86 143
PPM 233132     17:30:13.5 -14:05:42  8.2  0.57 142
PPM 233094     17:28:30.6 -14:03:02  9.4  0.15 142
04HX78         17:27:54.4 -14:01:51 11.4       142
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 2.2 sigma about the mid-time.
The median site spacing is 14.9 km RECON observability=1.0 and success probability=6.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Rutland 06:38:06 -16.1 AT Down 20.1 146.7 Low 06:23:06 - 06:53:06 4454
Penticton 06:38:06 -16.4 AT Down 20.4 146.5 Low 06:23:06 - 06:53:06 4429
Okanagan Falls 06:38:07 -16.6 AT Down 20.5 146.4 Low 06:23:07 - 06:53:07 4418
Southern Okanagan 06:38:07 -16.7 AT Down 20.7 146.4 Low 06:23:07 - 06:53:07 4408
Oroville 06:38:07 -17.0 AT Down 20.9 146.5 Low 06:23:07 - 06:53:07 4396
Tonasket 06:38:08 -17.2 AT Down 21.1 146.4 Low 06:23:08 - 06:53:08 4382
Okanogan 06:38:09 -17.5 AT Down 21.3 146.2 Low 06:23:09 - 06:53:09 4359
Brewster 06:38:10 -17.7 AT Down 21.5 145.9 Low 06:23:10 - 06:53:10 4338
Manson/Chelan 06:38:11 -17.8 AT Down 21.5 145.5 Low 06:23:11 - 06:53:11 4318
Entiat 06:38:11 -18.0 Dark Down 21.7 145.4 Low 06:23:11 - 06:53:11 4303
Wenatchee 06:38:12 -18.2 Dark Down 21.9 145.3 Low 06:23:12 - 06:53:12 4286
Ellensburg 06:38:13 -18.6 Dark Down 22.1 145.0 Low 06:23:13 - 06:53:13 4255
Pasco 06:38:10 -19.6 Dark Down 23.3 146.2 Low 06:23:10 - 06:53:10 4236
Yakima 06:38:14 -18.9 Dark Down 22.4 144.9 Low 06:23:14 - 06:53:14 4229
PNWRO 06:38:11 -19.9 Dark Down 23.6 146.3 Low 06:23:11 - 06:53:11 4225
Toppenish/White Swan 06:38:13 -19.2 Dark Down 22.7 145.0 Low 06:23:13 - 06:53:13 4219
George/Umatilla 06:38:11 -19.9 Dark Down 23.5 145.9 Low 06:23:11 - 06:53:11 4210
Goldendale 06:38:16 -19.6 Dark Down 23.0 144.4 Low 06:23:16 - 06:53:16 4174
The Dalles 06:38:17 -19.7 Dark Down 23.0 144.0 Low 06:23:17 - 06:53:17 4152
Maupin 06:38:17 -20.1 Dark Down 23.4 144.0 Low 06:23:17 - 06:53:17 4127
Niwot 06:37:34 -27.7 Dark Down 33.3 159.0 Up 06:22:34 - 06:52:34 4098
Madras/Culver 06:38:18 -20.6 Dark Down 23.8 143.9 Low 06:23:18 - 06:53:18 4090
Redmond 06:38:19 -21.0 Dark Down 24.1 143.7 Low 06:23:19 - 06:53:19 4065
Sisters 06:38:20 -20.8 Dark Down 23.9 143.4 Low 06:23:20 - 06:53:20 4058
Bend 06:38:19 -21.1 Dark Down 24.2 143.5 Low 06:23:19 - 06:53:19 4047
Oregon Observatory 06:38:20 -21.3 Dark Down 24.3 143.4 Low 06:23:20 - 06:53:20 4033
La Pine/Gilchrist 06:38:20 -21.4 Dark Down 24.4 143.3 Low 06:23:20 - 06:53:20 4018
North Lake 06:38:20 -22.0 Dark Down 25.0 143.7 Low 06:23:20 - 06:53:20 4000
Paisley 06:38:19 -22.6 Dark Down 25.6 143.9 Low 06:23:19 - 06:53:19 3970
Lakeview 06:38:20 -23.1 Dark Down 26.1 143.9 Low 06:23:20 - 06:53:20 3939
Chiloquin 06:38:23 -22.4 Dark Down 25.2 142.6 Low 06:23:23 - 06:53:23 3933
Klamath Falls 06:38:23 -22.7 Dark Down 25.5 142.6 Low 06:23:23 - 06:53:23 3911
Tulelake 06:38:23 -23.1 Dark Down 25.8 142.8 Low 06:23:23 - 06:53:23 3898
Cedarville 06:38:20 -23.8 Dark Down 26.7 143.9 Low 06:23:20 - 06:53:20 3896
Fall River/Burney 06:38:24 -23.9 Dark Down 26.6 142.6 Low 06:23:24 - 06:53:24 3835
Susanville 06:38:23 -24.7 Dark Down 27.4 143.1 Low 06:23:23 - 06:53:23 3805
Gimple 06:38:23 -24.9 Dark Down 27.5 142.8 Low 06:23:23 - 06:53:23 3781
Greenville 06:38:24 -24.9 Dark Down 27.5 142.8 Low 06:23:24 - 06:53:24 3779
Portola 06:38:23 -25.3 Dark Down 28.0 143.1 Low 06:23:23 - 06:53:23 3765
Quincy 06:38:24 -25.1 Dark Down 27.7 142.7 Low 06:23:24 - 06:53:24 3764
Reno 06:38:21 -25.8 Dark Down 28.5 143.7 Low 06:23:21 - 06:53:21 3760
Carson City 06:38:21 -26.1 Dark Down 28.8 143.6 Low 06:23:21 - 06:53:21 3734
Yerington 06:38:20 -26.4 Dark Down 29.2 144.1 Low 06:23:20 - 06:53:20 3734
Gardnerville 06:38:21 -26.3 Dark Down 29.0 143.5 Low 06:23:21 - 06:53:21 3717
Hawthorne 06:38:19 -27.0 Dark Down 29.9 144.5 Low 06:23:19 - 06:53:19 3711
Tonopah 06:38:15 -27.8 Dark Down 30.9 145.7 Up 06:23:15 - 06:53:15 3707
Lee Vining 06:38:21 -27.4 Dark Down 30.1 143.8 Up 06:23:21 - 06:53:21 3658
Beatty 06:38:14 -29.0 Dark Down 32.0 145.8 Up 06:23:14 - 06:53:14 3630
Indian Springs 06:38:11 -29.6 Dark Down 32.8 146.8 Up 06:23:11 - 06:53:11 3629
Bishop 06:38:20 -28.2 Dark Down 30.9 144.3 Up 06:23:20 - 06:53:20 3628
Henderson 06:38:10 -30.3 Dark Down 33.5 147.3 Up 06:23:10 - 06:53:10 3603
Patrick 06:38:06 -31.1 Dark Down 34.5 148.2 Up 06:23:06 - 06:53:06 3579
Lone Pine 06:38:19 -29.0 Dark Down 31.7 144.4 Up 06:23:19 - 06:53:19 3578
DCO 06:38:04 -31.5 Dark Down 35.1 148.8 Up 06:23:04 - 06:53:04 3571
Searchlight/Boulder City 06:38:10 -30.8 Dark Down 34.0 147.1 Up 06:23:10 - 06:53:10 3560
Kingman/Dolan Springs 06:38:07 -31.3 Dark Down 34.6 147.9 Up 06:23:07 - 06:53:07 3558
Laughlin/Bullhead City 06:38:09 -31.2 Dark Down 34.4 147.4 Up 06:23:09 - 06:53:09 3545
Mohave Valley 06:38:09 -31.5 Dark Down 34.7 147.3 Up 06:23:09 - 06:53:09 3523
Lake Havasu City 06:38:09 -31.9 Dark Down 35.1 147.4 Up 06:23:09 - 06:53:09 3498
Parker 06:38:09 -32.2 Dark Down 35.4 147.3 Up 06:23:09 - 06:53:09 3470
Blythe 06:38:10 -32.7 Dark Down 35.7 146.8 Up 06:23:10 - 06:53:10 3422
CPSLO 06:38:28 -29.5 Dark Down 31.5 141.4 Up 06:23:28 - 06:53:28 3417
Idyllwild 06:38:17 -32.1 Dark Down 34.7 144.6 Up 06:23:17 - 06:53:17 3383
Wildwood 06:38:23 -31.2 Dark Down 33.4 142.9 Up 06:23:23 - 06:53:23 3368
Calipatria 06:38:13 -32.9 Dark Down 35.7 145.6 Up 06:23:13 - 06:53:13 3361
Yuma 06:38:11 -33.6 Dark Down 36.5 146.4 Up 06:23:11 - 06:53:11 3347

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 04HX78, (2019/06/01 06:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.29 153
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.32 146
53Nu Ser       17:20:49.7 -12:50:49  4.0  1.86 143
PPM 233132     17:29:07.3 -14:04:50  8.2  0.57 142
PPM 233094     17:27:24.5 -14:02:07  9.4  0.15 142
04HX78         17:26:48.2 -14:00:56 11.4       142
Positions are for J2000

Event circumstances last updated at 2018/09/23 17:47:23 UT

Marc W. Buie, Southwest Research Institute

RECON