RECON: TNO occultation with 250112

Event between (250112) 02KY14 and star UC4-513-022949 with event index number of 184200

Geocentric closest approach at 2019/04/01 03:13:18 UTC

J2000 position of star is 06:17:17.2 +12:25:37
Equinox of date position of star is 06:18:17.6 +12:25:09
Stellar brightness R=16.3, use SENSEUP=128
Star is 129 degrees from the moon. Moon is 16% illuminated.
TNO apparent brightness V=21.3

[RECON map]
TNO is 13.1 AU from the Sun and 13.2 AU from the Earth.
The TNO is moving 10.9 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 108 seconds.
The 1-sigma cross-track error in the shadow position is 614 km.
The sky-plane scale is 9542.0 km/arcsec.

The TNO has an absolute magnitude Hv=9.7
Diameter=69.2 km assuming a 5% albedo -- 6.3 sec chord
Diameter=28.2 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 250112, (2019/04/01 03:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.9 +07:24:33  0.4  7.41 122
Alhena         06:38:49.4 +16:22:53  1.9  6.34 134
73 Ori         06:16:49.8 +12:32:36  5.4  0.40 128
PPM 122223     06:18:11.1 +11:58:12  8.2  0.45 128
PPM 122216     06:17:52.3 +12:04:02  8.7  0.37 128
PPM 122238     06:18:58.2 +12:18:03 10.7  0.19 129
250112         06:18:22.1 +12:25:07 16.3       129
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 5.0 sigma about the mid-time.
The median site spacing is 39.4 km RECON observability=0.2 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 03:17:33 -8.9 CT Down 48.1 217.9 Up 03:08:06 - 03:27:01 6036
Tonasket 03:17:33 -9.0 CT Down 48.3 218.1 Up 03:08:06 - 03:27:01 6015
Okanogan 03:17:33 -9.0 CT Down 48.6 218.1 Up 03:08:06 - 03:27:01 5985
Brewster 03:17:32 -8.9 CT Down 48.9 218.0 Up 03:08:05 - 03:27:00 5962
Manson/Chelan 03:17:30 -8.7 CT Down 49.2 217.6 Up 03:08:03 - 03:26:58 5947
Entiat 03:17:28 -8.8 CT Down 49.4 217.7 Up 03:08:01 - 03:26:56 5927
Wenatchee 03:17:28 -8.8 CT Down 49.7 217.7 Up 03:08:00 - 03:26:55 5904
Ellensburg 03:17:28 -8.7 CT Down 50.1 217.7 Up 03:08:01 - 03:26:56 5867
Yakima 03:17:29 -8.8 CT Down 50.4 218.0 Up 03:08:02 - 03:26:57 5829
Toppenish/White Swan 03:17:30 -9.0 CT Down 50.5 218.4 Up 03:08:03 - 03:26:58 5806
Pasco 03:17:37 -9.9 CT Down 50.1 220.3 Up 03:08:09 - 03:27:04 5777
Goldendale 03:17:27 -8.9 CT Down 51.2 218.2 Up 03:08:00 - 03:26:55 5758
PNWRO 03:17:40 -10.1 CT Down 50.1 220.8 Up 03:08:12 - 03:27:07 5750
George/Umatilla 03:17:36 -9.9 CT Down 50.4 220.3 Up 03:08:09 - 03:27:04 5747
The Dalles 03:17:25 -8.7 CT Down 51.5 217.9 Up 03:07:57 - 03:26:52 5742
Maupin 03:17:26 -8.9 CT Down 51.8 218.4 Up 03:07:58 - 03:26:53 5700
Madras/Culver 03:17:25 -9.0 CT Down 52.2 218.7 Up 03:07:58 - 03:26:53 5647
Sisters 03:17:23 -8.8 CT Down 52.7 218.3 Up 03:07:55 - 03:26:50 5621
Redmond 03:17:25 -9.0 CT Down 52.5 219.0 Up 03:07:58 - 03:26:53 5613
Bend 03:17:24 -9.0 CT Down 52.8 218.9 Up 03:07:57 - 03:26:52 5594
Oregon Observatory 03:17:24 -9.0 CT Down 52.9 218.9 Up 03:07:56 - 03:26:51 5579
La Pine/Gilchrist 03:17:23 -9.0 CT Down 53.1 219.0 Up 03:07:56 - 03:26:51 5560
North Lake 03:17:27 -9.5 CT Down 53.2 220.2 Up 03:07:59 - 03:26:54 5508
Chiloquin 03:17:20 -9.0 CT Down 54.2 219.4 Up 03:07:52 - 03:26:47 5455
Paisley 03:17:30 -9.9 CT Down 53.4 221.2 Up 03:08:02 - 03:26:57 5448
Klamath Falls 03:17:21 -9.1 CT Down 54.4 219.8 Up 03:07:54 - 03:26:49 5420
Lakeview 03:17:31 -10.2 CT Down 53.7 222.0 Up 03:08:03 - 03:26:58 5395
Tulelake 03:17:24 -9.4 CT Down 54.4 220.5 Up 03:07:56 - 03:26:51 5389
Cedarville 03:17:32 -10.5 CT Down 54.1 222.8 Up 03:08:05 - 03:27:00 5326
Fall River/Burney 03:17:23 -9.7 CT Down 55.1 221.5 Up 03:07:56 - 03:26:51 5297
Susanville 03:17:29 -10.4 CT Down 55.2 223.2 Up 03:08:02 - 03:26:57 5222
Greenville 03:17:27 -10.3 CT Down 55.5 223.0 Up 03:08:00 - 03:26:55 5198
Gimple 03:17:28 -10.3 CT Down 55.5 223.2 Up 03:08:00 - 03:26:55 5197
Quincy 03:17:27 -10.3 CT Down 55.7 223.2 Up 03:07:59 - 03:26:54 5178
Portola 03:17:30 -10.7 CT Down 55.5 224.1 Up 03:08:03 - 03:26:58 5158
Reno 03:17:36 -11.3 CT Down 55.3 225.3 Up 03:08:08 - 03:27:03 5121
Carson City 03:17:35 -11.4 CT Down 55.6 225.7 Up 03:08:07 - 03:27:02 5084
Gardnerville 03:17:35 -11.5 CT Down 55.7 226.0 Up 03:08:07 - 03:27:02 5058
Yerington 03:17:40 -12.0 CT Down 55.3 226.8 Up 03:08:12 - 03:27:07 5054
Niwot 03:19:12 -21.9 Dark Down 45.6 242.7 Up 03:09:45 - 03:28:40 5013
Hawthorne 03:17:44 -12.5 AT Down 55.3 228.1 Up 03:08:17 - 03:27:12 4999
Lee Vining 03:17:41 -12.3 AT Down 56.0 228.0 Up 03:08:13 - 03:27:08 4948
Tonopah 03:17:54 -13.7 AT Down 54.8 230.6 Up 03:08:27 - 03:27:22 4931
Bishop 03:17:45 -13.0 AT Down 56.0 229.7 Up 03:08:18 - 03:27:13 4876
Beatty 03:17:58 -14.4 AT Down 55.2 232.5 Up 03:08:31 - 03:27:26 4804
Lone Pine 03:17:48 -13.5 AT Down 56.2 231.0 Up 03:08:20 - 03:27:15 4792
Indian Springs 03:18:05 -15.4 AT Down 54.7 234.3 Up 03:08:38 - 03:27:33 4755
CPSLO 03:17:29 -11.7 CT Down 58.7 228.8 Up 03:08:01 - 03:26:56 4698
Henderson 03:18:11 -16.1 AT Down 54.5 235.8 Up 03:08:44 - 03:27:39 4690
Searchlight/Boulder City 03:18:11 -16.3 AT Down 54.8 236.5 Up 03:08:43 - 03:27:38 4629
Patrick 03:18:19 -17.2 AT Down 54.1 237.9 Up 03:08:52 - 03:27:47 4609
Laughlin/Bullhead City 03:18:15 -16.7 AT Down 54.7 237.3 Up 03:08:47 - 03:27:42 4593
Kingman/Dolan Springs 03:18:18 -17.1 AT Down 54.3 237.9 Up 03:08:51 - 03:27:46 4588
DCO 03:18:24 -17.8 AT Down 53.7 239.1 Up 03:08:57 - 03:27:52 4568
Mohave Valley 03:18:14 -16.8 AT Down 54.9 237.7 Up 03:08:46 - 03:27:41 4564
Wildwood 03:17:45 -13.7 AT Down 58.1 233.4 Up 03:08:17 - 03:27:12 4538
Lake Havasu City 03:18:15 -17.1 AT Down 54.9 238.4 Up 03:08:48 - 03:27:43 4518
Parker 03:18:16 -17.2 AT Down 55.0 238.9 Up 03:08:49 - 03:27:44 4481
Idyllwild 03:17:58 -15.4 AT Down 57.0 236.4 Up 03:08:30 - 03:27:25 4471
Blythe 03:18:14 -17.1 AT Down 55.5 239.2 Up 03:08:46 - 03:27:41 4429
Calipatria 03:18:07 -16.5 AT Down 56.5 238.7 Up 03:08:39 - 03:27:34 4390
Yuma 03:18:14 -17.4 AT Down 56.0 240.3 Up 03:08:47 - 03:27:42 4331

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 250112, (2019/04/01 03:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  7.41 122
Alhena         06:37:42.8 +16:23:57  1.9  6.34 134
73 Ori         06:15:44.9 +12:33:03  5.4  0.40 128
PPM 122223     06:17:06.5 +11:58:41  8.2  0.45 128
PPM 122216     06:16:47.6 +12:04:31  8.7  0.37 128
PPM 122238     06:17:53.5 +12:18:34 10.7  0.19 129
250112         06:17:17.2 +12:25:37 16.3       128
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:49:21 UT

Marc W. Buie, Southwest Research Institute

RECON