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 06:18:15.8 +12:25:10
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 79 seconds.
The 1-sigma cross-track error in the shadow position is 543 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 39.6 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 03:17:35 -8.9 CT Down 48.1 217.9 Up 03:10:30 - 03:24:39 6033
Tonasket 03:17:35 -9.0 CT Down 48.3 218.1 Up 03:10:30 - 03:24:39 6011
Okanogan 03:17:34 -9.0 CT Down 48.6 218.1 Up 03:10:29 - 03:24:38 5981
Brewster 03:17:33 -8.9 CT Down 48.9 218.0 Up 03:10:29 - 03:24:38 5958
Manson/Chelan 03:17:33 -8.8 CT Down 49.2 217.7 Up 03:10:28 - 03:24:37 5943
Entiat 03:17:31 -8.8 CT Down 49.4 217.7 Up 03:10:27 - 03:24:36 5923
Wenatchee 03:17:30 -8.8 CT Down 49.7 217.8 Up 03:10:25 - 03:24:34 5900
Ellensburg 03:17:29 -8.7 CT Down 50.1 217.7 Up 03:10:25 - 03:24:34 5864
Yakima 03:17:29 -8.8 CT Down 50.4 218.0 Up 03:10:25 - 03:24:34 5825
Toppenish/White Swan 03:17:31 -9.0 CT Down 50.5 218.4 Up 03:10:27 - 03:24:36 5802
Pasco 03:17:39 -9.9 CT Down 50.1 220.3 Up 03:10:34 - 03:24:43 5773
Goldendale 03:17:29 -8.9 CT Down 51.2 218.2 Up 03:10:24 - 03:24:33 5754
PNWRO 03:17:41 -10.1 CT Down 50.1 220.8 Up 03:10:37 - 03:24:46 5746
George/Umatilla 03:17:38 -9.9 CT Down 50.4 220.3 Up 03:10:33 - 03:24:42 5743
The Dalles 03:17:27 -8.7 CT Down 51.5 217.9 Up 03:10:22 - 03:24:31 5738
Maupin 03:17:27 -8.9 CT Down 51.8 218.4 Up 03:10:23 - 03:24:32 5696
Madras/Culver 03:17:27 -9.0 CT Down 52.2 218.8 Up 03:10:23 - 03:24:32 5643
Sisters 03:17:25 -8.8 CT Down 52.7 218.4 Up 03:10:21 - 03:24:30 5617
Redmond 03:17:27 -9.1 CT Down 52.5 219.0 Up 03:10:22 - 03:24:31 5609
Bend 03:17:27 -9.0 CT Down 52.7 218.9 Up 03:10:22 - 03:24:31 5590
Oregon Observatory 03:17:25 -9.0 CT Down 52.9 218.9 Up 03:10:21 - 03:24:30 5575
La Pine/Gilchrist 03:17:25 -9.0 CT Down 53.1 219.0 Up 03:10:21 - 03:24:30 5556
North Lake 03:17:29 -9.5 CT Down 53.2 220.2 Up 03:10:25 - 03:24:34 5504
Chiloquin 03:17:24 -9.0 CT Down 54.2 219.4 Up 03:10:19 - 03:24:28 5451
Paisley 03:17:31 -9.9 CT Down 53.4 221.2 Up 03:10:27 - 03:24:36 5444
Klamath Falls 03:17:23 -9.1 CT Down 54.4 219.8 Up 03:10:19 - 03:24:28 5416
Lakeview 03:17:32 -10.2 CT Down 53.7 222.0 Up 03:10:28 - 03:24:37 5391
Tulelake 03:17:26 -9.4 CT Down 54.4 220.5 Up 03:10:21 - 03:24:30 5385
Cedarville 03:17:33 -10.5 CT Down 54.1 222.8 Up 03:10:29 - 03:24:38 5323
Fall River/Burney 03:17:27 -9.7 CT Down 55.1 221.5 Up 03:10:22 - 03:24:31 5292
Susanville 03:17:31 -10.4 CT Down 55.2 223.2 Up 03:10:27 - 03:24:36 5218
Greenville 03:17:29 -10.3 CT Down 55.5 223.0 Up 03:10:24 - 03:24:33 5194
Gimple 03:17:29 -10.4 CT Down 55.5 223.2 Up 03:10:25 - 03:24:34 5193
Quincy 03:17:29 -10.3 CT Down 55.7 223.2 Up 03:10:25 - 03:24:34 5174
Portola 03:17:32 -10.7 CT Down 55.5 224.1 Up 03:10:27 - 03:24:36 5154
Reno 03:17:38 -11.3 CT Down 55.3 225.3 Up 03:10:33 - 03:24:42 5117
Carson City 03:17:38 -11.4 CT Down 55.6 225.7 Up 03:10:33 - 03:24:42 5080
Gardnerville 03:17:38 -11.5 CT Down 55.7 226.0 Up 03:10:33 - 03:24:42 5054
Yerington 03:17:42 -12.0 CT Down 55.3 226.9 Up 03:10:37 - 03:24:46 5051
Niwot 03:19:16 -21.9 Dark Down 45.6 242.7 Up 03:12:11 - 03:26:20 5011
Hawthorne 03:17:46 -12.5 AT Down 55.3 228.1 Up 03:10:42 - 03:24:51 4995
Lee Vining 03:17:43 -12.3 AT Down 56.0 228.0 Up 03:10:39 - 03:24:48 4945
Tonopah 03:17:57 -13.7 AT Down 54.8 230.6 Up 03:10:53 - 03:25:02 4927
Bishop 03:17:48 -13.0 AT Down 56.0 229.7 Up 03:10:44 - 03:24:53 4872
Beatty 03:18:00 -14.4 AT Down 55.2 232.5 Up 03:10:56 - 03:25:05 4800
Lone Pine 03:17:49 -13.5 AT Down 56.2 231.1 Up 03:10:44 - 03:24:53 4788
Indian Springs 03:18:07 -15.4 AT Down 54.7 234.3 Up 03:11:02 - 03:25:11 4752
CPSLO 03:17:30 -11.7 CT Down 58.7 228.9 Up 03:10:26 - 03:24:35 4693
Henderson 03:18:13 -16.1 AT Down 54.5 235.8 Up 03:11:09 - 03:25:18 4686
Searchlight/Boulder City 03:18:14 -16.3 AT Down 54.8 236.6 Up 03:11:10 - 03:25:19 4625
Patrick 03:18:21 -17.2 AT Down 54.1 237.9 Up 03:11:17 - 03:25:26 4606
Laughlin/Bullhead City 03:18:17 -16.7 AT Down 54.7 237.3 Up 03:11:12 - 03:25:21 4589
Kingman/Dolan Springs 03:18:20 -17.1 AT Down 54.3 238.0 Up 03:11:16 - 03:25:25 4585
DCO 03:18:27 -17.8 AT Down 53.7 239.1 Up 03:11:23 - 03:25:32 4565
Mohave Valley 03:18:17 -16.8 AT Down 54.8 237.7 Up 03:11:12 - 03:25:21 4560
Wildwood 03:17:46 -13.7 AT Down 58.1 233.4 Up 03:10:42 - 03:24:51 4533
Lake Havasu City 03:18:18 -17.1 AT Down 54.9 238.5 Up 03:11:13 - 03:25:22 4515
Parker 03:18:18 -17.2 AT Down 55.0 238.9 Up 03:11:14 - 03:25:23 4477
Idyllwild 03:18:01 -15.4 AT Down 57.0 236.4 Up 03:10:56 - 03:25:05 4468
Blythe 03:18:17 -17.1 AT Down 55.5 239.2 Up 03:11:12 - 03:25:21 4425
Calipatria 03:18:08 -16.5 AT Down 56.5 238.7 Up 03:11:04 - 03:25:13 4386
Yuma 03:18:16 -17.4 AT Down 56.0 240.3 Up 03:11:12 - 03:25:21 4327

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 2017/05/21 16:36:57 UT

Marc W. Buie, Southwest Research Institute

RECON