RECON: TNO occultation with 05UN524

Event between 05UN524 and star UC4-644-040046 with event index number of 186745

Geocentric closest approach at 2019/05/02 04:27:53 UTC

J2000 position of star is 06:53:55.4 +38:39:44
Equinox of date position of star is 06:55:06.9 +38:38:22
Stellar brightness R=12.5, use SENSEUP=16
Star is 93 degrees from the moon. Moon is 8% illuminated.
TNO apparent brightness V=22.4

[RECON map]
TNO is 18.8 AU from the Sun and 19.3 AU from the Earth.
The TNO is moving 22.5 km/sec on the sky relative to the star, or, 5.8 arcsec/hr.
The 1-sigma error in the time of the event is 406 seconds.
The 1-sigma cross-track error in the shadow position is 4098 km.
The sky-plane scale is 13965.8 km/arcsec.

The TNO has an absolute magnitude Hv=9.3
Diameter=84.3 km assuming a 5% albedo -- 3.7 sec chord
Diameter=34.4 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 05UN524, (2019/05/02 04:28UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:29.9 +27:58:41  1.1 15.08 104
34Bet Aur      06:00:56.9 +44:56:50  1.9 11.90  83
61Psi8Aur      06:55:16.5 +38:28:45  6.2  0.16  93
PPM 072203     06:54:33.4 +38:33:43 11.7  0.15  93
05UN524        06:55:14.9 +38:38:13 12.5        93
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 8.0 km RECON observability=0.6 and success probability=5.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 04:30:28 -24.9 Dark Down 31.2 296.4 Up 04:15:28 - 04:45:28 6210
Oroville 04:29:47 -11.4 CT Down 43.9 282.5 Up 04:14:47 - 04:44:47 5853
Tonasket 04:29:47 -11.6 CT Down 43.8 282.7 Up 04:14:47 - 04:44:47 5843
Okanogan 04:29:49 -11.7 CT Down 43.8 282.9 Up 04:14:49 - 04:44:49 5819
Brewster 04:29:50 -11.8 CT Down 43.9 283.0 Up 04:14:50 - 04:44:50 5796
Manson/Chelan 04:29:50 -11.7 CT Down 44.1 283.0 Up 04:14:50 - 04:44:50 5767
Entiat 04:29:51 -11.8 CT Down 44.1 283.2 Up 04:14:51 - 04:44:51 5753
PNWRO 04:29:59 -13.6 AT Down 42.8 285.5 Up 04:14:59 - 04:44:59 5741
Pasco 04:29:58 -13.3 AT Down 43.0 285.1 Up 04:14:58 - 04:44:58 5741
Wenatchee 04:29:53 -11.9 CT Down 44.1 283.4 Up 04:14:53 - 04:44:53 5735
George/Umatilla 04:30:00 -13.4 AT Down 43.1 285.3 Up 04:15:00 - 04:45:00 5713
Ellensburg 04:29:55 -12.1 AT Down 44.1 283.6 Up 04:14:55 - 04:44:55 5703
Yakima 04:29:56 -12.3 AT Down 44.1 284.0 Up 04:14:56 - 04:44:56 5682
Toppenish/White Swan 04:29:57 -12.6 AT Down 43.9 284.3 Up 04:14:57 - 04:44:57 5680
Goldendale 04:29:59 -12.7 AT Down 44.0 284.6 Up 04:14:59 - 04:44:59 5629
The Dalles 04:30:00 -12.6 AT Down 44.2 284.6 Up 04:15:00 - 04:45:00 5598
Maupin 04:30:01 -12.9 AT Down 44.0 285.1 Up 04:15:01 - 04:45:01 5582
Madras/Culver 04:30:04 -13.3 AT Down 43.9 285.6 Up 04:15:04 - 04:45:04 5551
Redmond 04:30:05 -13.4 AT Down 43.8 285.9 Up 04:15:05 - 04:45:05 5530
Bend 04:30:06 -13.5 AT Down 43.9 286.0 Up 04:15:06 - 04:45:06 5511
Sisters 04:30:05 -13.2 AT Down 44.1 285.6 Up 04:15:05 - 04:45:05 5509
DCO 04:30:47 -24.2 Dark Down 34.7 296.3 Up 04:15:47 - 04:45:47 5496
Oregon Observatory 04:30:06 -13.5 AT Down 43.9 286.1 Up 04:15:06 - 04:45:06 5494
North Lake 04:30:10 -14.2 AT Down 43.4 286.9 Up 04:15:10 - 04:45:10 5490
Paisley 04:30:12 -14.8 AT Down 42.9 287.6 Up 04:15:12 - 04:45:12 5480
La Pine/Gilchrist 04:30:07 -13.6 AT Down 43.9 286.2 Up 04:15:07 - 04:45:07 5480
Patrick 04:30:46 -23.5 Dark Down 35.3 295.8 Up 04:15:46 - 04:45:46 5469
Lakeview 04:30:14 -15.2 AT Down 42.6 288.2 Up 04:15:14 - 04:45:14 5463
Kingman/Dolan Springs 04:30:46 -23.5 Dark Down 35.4 295.9 Up 04:15:46 - 04:45:46 5445
Cedarville 04:30:17 -15.7 AT Down 42.3 288.8 Up 04:15:17 - 04:45:17 5437
Henderson 04:30:43 -22.4 Dark Down 36.4 295.0 Up 04:15:43 - 04:45:43 5436
Indian Springs 04:30:40 -21.6 Dark Down 37.2 294.4 Up 04:15:40 - 04:45:40 5425
Tonopah 04:30:33 -19.7 Dark Down 38.9 292.8 Up 04:15:33 - 04:45:33 5416
Laughlin/Bullhead City 04:30:46 -23.2 Dark Down 35.7 295.8 Up 04:15:46 - 04:45:46 5412
Searchlight/Boulder City 04:30:45 -22.8 Dark Down 36.1 295.5 Up 04:15:45 - 04:45:45 5408
Chiloquin 04:30:12 -14.1 AT Down 43.8 287.1 Up 04:15:12 - 04:45:12 5399
Mohave Valley 04:30:47 -23.4 Dark Down 35.6 295.9 Up 04:15:47 - 04:45:47 5396
Lake Havasu City 04:30:49 -23.8 Dark Down 35.2 296.3 Up 04:15:49 - 04:45:49 5389
Tulelake 04:30:14 -14.7 AT Down 43.4 287.8 Up 04:15:14 - 04:45:14 5386
Klamath Falls 04:30:14 -14.4 AT Down 43.7 287.5 Up 04:15:14 - 04:45:14 5384
Beatty 04:30:38 -20.8 Dark Down 38.1 293.8 Up 04:15:38 - 04:45:38 5378
Parker 04:30:50 -24.1 Dark Down 35.1 296.5 Up 04:15:50 - 04:45:50 5370
Hawthorne 04:30:30 -18.6 Dark Down 40.1 291.9 Up 04:15:30 - 04:45:30 5358
Yerington 04:30:28 -17.9 AT Down 40.7 291.4 Up 04:15:28 - 04:45:28 5353
Susanville 04:30:21 -16.1 AT Down 42.3 289.6 Up 04:15:21 - 04:45:21 5347
Reno 04:30:25 -17.2 AT Down 41.3 290.6 Up 04:15:25 - 04:45:25 5346
Fall River/Burney 04:30:18 -15.3 AT Down 43.0 288.7 Up 04:15:18 - 04:45:18 5339
Carson City 04:30:27 -17.4 AT Down 41.2 291.0 Up 04:15:27 - 04:45:27 5327
Portola 04:30:24 -16.6 AT Down 41.9 290.2 Up 04:15:24 - 04:45:24 5323
Blythe 04:30:52 -24.3 Dark Down 35.0 296.7 Up 04:15:52 - 04:45:52 5321
Gimple 04:30:21 -16.2 AT Down 42.3 289.7 Up 04:15:21 - 04:45:21 5318
Gardnerville 04:30:28 -17.6 AT Down 41.1 291.2 Up 04:15:28 - 04:45:28 5316
Greenville 04:30:21 -16.1 AT Down 42.4 289.7 Up 04:15:21 - 04:45:21 5314
Bishop 04:30:35 -19.4 Dark Down 39.5 292.9 Up 04:15:35 - 04:45:35 5306
Quincy 04:30:22 -16.3 AT Down 42.3 289.9 Up 04:15:22 - 04:45:22 5302
Lee Vining 04:30:32 -18.6 Dark Down 40.2 292.2 Up 04:15:32 - 04:45:32 5297
Lone Pine 04:30:39 -20.1 Dark Down 38.9 293.6 Up 04:15:39 - 04:45:39 5282
Yuma 04:30:55 -24.8 Dark Down 34.6 297.3 Up 04:15:55 - 04:45:55 5264
Calipatria 04:30:53 -24.0 Dark Down 35.5 296.8 Up 04:15:53 - 04:45:53 5233
Idyllwild 04:30:50 -22.8 Dark Down 36.7 296.1 Up 04:15:50 - 04:45:50 5196
Wildwood 04:30:48 -21.3 Dark Down 38.3 295.3 Up 04:15:48 - 04:45:48 5098
CPSLO 04:30:41 -19.2 Dark Down 40.3 293.8 Up 04:15:41 - 04:45:41 5043

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 05UN524, (2019/05/02 04:28UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1 15.08 104
34Bet Aur      05:59:31.6 +44:56:51  1.9 11.90  83
61Psi8Aur      06:53:57.1 +38:30:17  6.2  0.16  93
PPM 072203     06:53:13.9 +38:35:14 11.7  0.15  93
05UN524        06:53:55.4 +38:39:44 12.5        93
Positions are for J2000

Event circumstances last updated at 2017/05/21 16:38:31 UT

Marc W. Buie, Southwest Research Institute

RECON