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 06:55:11.1 +38:38:17
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 614 seconds.
The 1-sigma cross-track error in the shadow position is 6149 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         07:46:29.8 +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 1.5 sigma about the mid-time.
The median site spacing is 7.7 km RECON observability=0.6 and success probability=4.2%
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 6193
Oroville 04:29:46 -11.4 CT Down 43.9 282.4 Up 04:14:46 - 04:44:46 5839
Tonasket 04:29:47 -11.6 CT Down 43.8 282.7 Up 04:14:47 - 04:44:47 5828
Okanogan 04:29:48 -11.7 CT Down 43.8 282.9 Up 04:14:48 - 04:44:48 5805
Brewster 04:29:50 -11.8 CT Down 43.9 283.0 Up 04:14:50 - 04:44:50 5781
Manson/Chelan 04:29:50 -11.7 CT Down 44.1 283.0 Up 04:14:50 - 04:44:50 5752
Entiat 04:29:51 -11.8 CT Down 44.1 283.2 Up 04:14:51 - 04:44:51 5738
Pasco 04:29:58 -13.3 AT Down 43.0 285.1 Up 04:14:58 - 04:44:58 5726
PNWRO 04:29:59 -13.6 AT Down 42.8 285.5 Up 04:14:59 - 04:44:59 5725
Wenatchee 04:29:52 -11.9 CT Down 44.1 283.4 Up 04:14:52 - 04:44:52 5720
George/Umatilla 04:29:59 -13.4 AT Down 43.1 285.3 Up 04:14:59 - 04:44:59 5697
Ellensburg 04:29:54 -12.1 AT Down 44.2 283.6 Up 04:14:54 - 04:44:54 5688
Yakima 04:29:55 -12.3 AT Down 44.1 284.0 Up 04:14:55 - 04:44:55 5667
Toppenish/White Swan 04:29:56 -12.6 AT Down 43.9 284.3 Up 04:14:56 - 04:44:56 5665
Goldendale 04:29:59 -12.7 AT Down 44.0 284.6 Up 04:14:59 - 04:44:59 5614
The Dalles 04:29:59 -12.6 AT Down 44.2 284.6 Up 04:14:59 - 04:44:59 5583
Maupin 04:30:01 -12.9 AT Down 44.0 285.1 Up 04:15:01 - 04:45:01 5566
Madras/Culver 04:30:03 -13.3 AT Down 43.9 285.6 Up 04:15:03 - 04:45:03 5535
Redmond 04:30:05 -13.4 AT Down 43.8 285.9 Up 04:15:05 - 04:45:05 5513
Bend 04:30:06 -13.5 AT Down 43.9 286.0 Up 04:15:06 - 04:45:06 5494
Sisters 04:30:05 -13.2 AT Down 44.1 285.6 Up 04:15:05 - 04:45:05 5493
Oregon Observatory 04:30:06 -13.5 AT Down 43.9 286.1 Up 04:15:06 - 04:45:06 5477
DCO 04:30:47 -24.2 Dark Down 34.7 296.3 Up 04:15:47 - 04:45:47 5477
North Lake 04:30:10 -14.2 AT Down 43.4 286.9 Up 04:15:10 - 04:45:10 5473
La Pine/Gilchrist 04:30:07 -13.6 AT Down 43.9 286.2 Up 04:15:07 - 04:45:07 5463
Paisley 04:30:12 -14.8 AT Down 42.9 287.6 Up 04:15:12 - 04:45:12 5463
Patrick 04:30:46 -23.5 Dark Down 35.3 295.8 Up 04:15:46 - 04:45:46 5451
Lakeview 04:30:14 -15.2 AT Down 42.6 288.2 Up 04:15:14 - 04:45:14 5446
Kingman/Dolan Springs 04:30:46 -23.5 Dark Down 35.4 295.9 Up 04:15:46 - 04:45:46 5427
Cedarville 04:30:17 -15.7 AT Down 42.3 288.8 Up 04:15:17 - 04:45:17 5420
Henderson 04:30:42 -22.4 Dark Down 36.4 295.0 Up 04:15:42 - 04:45:42 5419
Indian Springs 04:30:39 -21.6 Dark Down 37.2 294.4 Up 04:15:39 - 04:45:39 5407
Tonopah 04:30:33 -19.7 Dark Down 38.9 292.8 Up 04:15:33 - 04:45:33 5398
Laughlin/Bullhead City 04:30:45 -23.2 Dark Down 35.7 295.8 Up 04:15:45 - 04:45:45 5394
Searchlight/Boulder City 04:30:44 -22.8 Dark Down 36.1 295.5 Up 04:15:44 - 04:45:44 5390
Chiloquin 04:30:12 -14.1 AT Down 43.8 287.1 Up 04:15:12 - 04:45:12 5382
Mohave Valley 04:30:47 -23.4 Dark Down 35.6 295.9 Up 04:15:47 - 04:45:47 5379
Lake Havasu City 04:30:48 -23.8 Dark Down 35.2 296.3 Up 04:15:48 - 04:45:48 5371
Tulelake 04:30:14 -14.7 AT Down 43.4 287.8 Up 04:15:14 - 04:45:14 5369
Klamath Falls 04:30:13 -14.4 AT Down 43.7 287.5 Up 04:15:13 - 04:45:13 5367
Beatty 04:30:37 -20.7 Dark Down 38.1 293.8 Up 04:15:37 - 04:45:37 5360
Parker 04:30:50 -24.1 Dark Down 35.1 296.5 Up 04:15:50 - 04:45:50 5352
Hawthorne 04:30:31 -18.6 Dark Down 40.1 291.9 Up 04:15:31 - 04:45:31 5340
Yerington 04:30:28 -17.9 AT Down 40.7 291.4 Up 04:15:28 - 04:45:28 5336
Susanville 04:30:21 -16.1 AT Down 42.3 289.6 Up 04:15:21 - 04:45:21 5329
Reno 04:30:25 -17.2 AT Down 41.3 290.6 Up 04:15:25 - 04:45:25 5328
Fall River/Burney 04:30:18 -15.3 AT Down 43.0 288.7 Up 04:15:18 - 04:45:18 5322
Carson City 04:30:27 -17.4 AT Down 41.2 291.0 Up 04:15:27 - 04:45:27 5309
Portola 04:30:24 -16.6 AT Down 41.9 290.2 Up 04:15:24 - 04:45:24 5306
Blythe 04:30:52 -24.3 Dark Down 35.0 296.7 Up 04:15:52 - 04:45:52 5303
Gimple 04:30:22 -16.2 AT Down 42.3 289.7 Up 04:15:22 - 04:45:22 5301
Gardnerville 04:30:28 -17.6 AT Down 41.1 291.2 Up 04:15:28 - 04:45:28 5298
Greenville 04:30:21 -16.1 AT Down 42.4 289.7 Up 04:15:21 - 04:45:21 5296
Bishop 04:30:35 -19.4 Dark Down 39.5 292.9 Up 04:15:35 - 04:45:35 5288
Quincy 04:30:23 -16.3 AT Down 42.3 289.9 Up 04:15:23 - 04:45:23 5285
Lee Vining 04:30:32 -18.6 Dark Down 40.2 292.2 Up 04:15:32 - 04:45:32 5279
Lone Pine 04:30:39 -20.1 Dark Down 38.9 293.6 Up 04:15:39 - 04:45:39 5264
Yuma 04:30:55 -24.8 Dark Down 34.6 297.3 Up 04:15:55 - 04:45:55 5246
Calipatria 04:30:53 -24.0 Dark Down 35.5 296.8 Up 04:15:53 - 04:45:53 5215
Idyllwild 04:30:50 -22.8 Dark Down 36.7 296.1 Up 04:15:50 - 04:45:50 5177
Wildwood 04:30:47 -21.3 Dark Down 38.3 295.3 Up 04:15:47 - 04:45:47 5080
CPSLO 04:30:41 -19.2 Dark Down 40.3 293.8 Up 04:15:41 - 04:45:41 5025

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 2018/05/24 18:21:44 UT

Marc W. Buie, Southwest Research Institute

RECON