RECON: TNO occultation with 250112

Event between (250112) 02KY14 and star TYC20741-00922-1 with event index number of 165780

Geocentric closest approach at 2018/12/04 13:12:58 UTC

J2000 position of star is 06:33:56.9 +12:04:08
Equinox of date position of star is 06:34:55.3 +12:03:16
Stellar brightness V=10.9, use SENSEUP=4
Star is 122 degrees from the moon. Moon is 8% illuminated.
TNO apparent brightness V=20.9

[RECON map]
TNO is 12.9 AU from the Sun and 12.0 AU from the Earth.
The TNO is moving 20.4 km/sec on the sky relative to the star, or, 8.4 arcsec/hr.
The 1-sigma error in the time of the event is 38 seconds.
The 1-sigma cross-track error in the shadow position is 511 km.
The sky-plane scale is 8729.2 km/arcsec.

The TNO has an absolute magnitude Hv=9.7
Diameter=69.2 km assuming a 5% albedo -- 3.4 sec chord
Diameter=28.2 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 250112, (2018/12/04 13:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:11.8 +07:24:33  0.4 10.63 131
Alhena         06:38:48.3 +16:22:54  1.9  4.43 121
PPM 122607     06:32:42.8 +11:46:38  6.3  0.63 122
PPM 122633     06:33:26.6 +11:39:30  7.2  0.55 122
PPM 122703     06:35:46.9 +11:59:59  8.9  0.20 121
PPM 122659     06:34:24.3 +11:57:25 11.5  0.18 122
250112         06:35:00.4 +12:03:11 10.9       121
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 23.7 km RECON observability=1.0 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 13:09:41 -22.7 Dark Up 33.1 248.4 Up 13:06:03 - 13:13:20 5429
Tonasket 13:09:41 -22.7 Dark Up 33.2 248.5 Up 13:06:02 - 13:13:19 5407
Okanogan 13:09:40 -22.8 Dark Up 33.4 248.6 Up 13:06:02 - 13:13:19 5375
Brewster 13:09:40 -22.9 Dark Up 33.6 248.6 Up 13:06:01 - 13:13:18 5349
Manson/Chelan 13:09:41 -23.1 Dark Up 33.9 248.4 Up 13:06:02 - 13:13:19 5328
Entiat 13:09:40 -23.1 Dark Up 34.1 248.5 Up 13:06:01 - 13:13:18 5307
Wenatchee 13:09:39 -23.1 Dark Up 34.2 248.5 Up 13:06:01 - 13:13:18 5283
Ellensburg 13:09:39 -23.2 Dark Up 34.5 248.6 Up 13:06:01 - 13:13:18 5243
Yakima 13:09:38 -23.2 Dark Up 34.7 248.8 Up 13:06:00 - 13:13:17 5205
Toppenish/White Swan 13:09:37 -23.0 Dark Up 34.6 249.1 Up 13:05:59 - 13:13:16 5185
Pasco 13:09:34 -22.1 Dark Up 33.9 250.3 Up 13:05:56 - 13:13:13 5179
PNWRO 13:09:33 -21.9 Dark Up 33.8 250.7 Up 13:05:55 - 13:13:12 5157
George/Umatilla 13:09:34 -22.2 Dark Up 34.1 250.3 Up 13:05:56 - 13:13:13 5146
Goldendale 13:09:37 -23.2 Dark Up 35.1 249.1 Up 13:05:59 - 13:13:16 5131
The Dalles 13:09:37 -23.4 Dark Up 35.4 248.9 Up 13:05:59 - 13:13:16 5107
Maupin 13:09:36 -23.3 Dark Up 35.5 249.3 Up 13:05:58 - 13:13:15 5068
Madras/Culver 13:09:36 -23.3 Dark Up 35.7 249.6 Up 13:05:57 - 13:13:14 5015
Sisters 13:09:36 -23.5 Dark Up 36.2 249.4 Up 13:05:57 - 13:13:14 4981
Redmond 13:09:35 -23.2 Dark Up 35.9 249.8 Up 13:05:56 - 13:13:13 4980
Bend 13:09:35 -23.3 Dark Up 36.1 249.8 Up 13:05:56 - 13:13:13 4959
Oregon Observatory 13:09:35 -23.4 Dark Up 36.2 249.8 Up 13:05:56 - 13:13:13 4942
La Pine/Gilchrist 13:09:34 -23.4 Dark Up 36.3 249.9 Up 13:05:56 - 13:13:13 4921
North Lake 13:09:32 -22.9 Dark Up 36.1 250.7 Up 13:05:53 - 13:13:10 4882
Paisley 13:09:30 -22.5 Dark Up 36.0 251.4 Up 13:05:52 - 13:13:09 4829
Chiloquin 13:09:33 -23.5 Dark Up 36.9 250.4 Up 13:05:55 - 13:13:12 4811
Lakeview 13:09:28 -22.3 Dark Up 36.0 251.9 Up 13:05:50 - 13:13:07 4780
Klamath Falls 13:09:32 -23.4 Dark Up 37.0 250.7 Up 13:05:54 - 13:13:11 4777
Tulelake 13:09:31 -23.1 Dark Up 36.9 251.1 Up 13:05:53 - 13:13:10 4752
Cedarville 13:09:27 -22.1 Dark Up 36.1 252.5 Up 13:05:48 - 13:13:05 4716
Niwot 13:08:50 -10.9 CT Up 25.4 264.4 Low 13:05:11 - 13:12:28 4689
Fall River/Burney 13:09:29 -22.9 Dark Up 37.1 251.9 Up 13:05:50 - 13:13:07 4662
Susanville 13:09:26 -22.2 Dark Up 36.8 252.9 Up 13:05:47 - 13:13:04 4602
Gimple 13:09:26 -22.3 Dark Up 37.0 252.9 Up 13:05:47 - 13:13:04 4573
Greenville 13:09:26 -22.4 Dark Up 37.1 252.9 Up 13:05:47 - 13:13:04 4573
Quincy 13:09:26 -22.3 Dark Up 37.1 253.0 Up 13:05:47 - 13:13:04 4553
Portola 13:09:24 -22.0 Dark Up 36.8 253.5 Up 13:05:46 - 13:13:03 4542
Reno 13:09:22 -21.4 Dark Up 36.4 254.2 Up 13:05:43 - 13:13:00 4519
Carson City 13:09:21 -21.3 Dark Up 36.5 254.5 Up 13:05:43 - 13:13:00 4483
Yerington 13:09:19 -20.8 Dark Up 36.1 255.1 Up 13:05:41 - 13:12:58 4466
Gardnerville 13:09:21 -21.3 Dark Up 36.5 254.7 Up 13:05:42 - 13:12:59 4458
Hawthorne 13:09:17 -20.3 Dark Up 35.8 255.8 Up 13:05:38 - 13:12:55 4422
Tonopah 13:09:12 -19.2 Dark Up 34.9 257.2 Up 13:05:34 - 13:12:51 4383
Lee Vining 13:09:17 -20.6 Dark Up 36.3 255.8 Up 13:05:39 - 13:12:56 4362
Bishop 13:09:14 -19.9 Dark Up 35.9 256.8 Up 13:05:35 - 13:12:52 4304
Beatty 13:09:09 -18.5 Dark Up 34.8 258.3 Up 13:05:30 - 13:12:47 4267
Indian Springs 13:09:06 -17.6 AT Up 34.0 259.3 Up 13:05:27 - 13:12:44 4241
Lone Pine 13:09:11 -19.5 Dark Up 35.8 257.6 Up 13:05:33 - 13:12:50 4228
Henderson 13:09:03 -17.0 AT Up 33.5 260.1 Up 13:05:24 - 13:12:41 4190
Patrick 13:08:59 -15.9 AT Up 32.8 261.2 Up 13:05:20 - 13:12:37 4134
Searchlight/Boulder City 13:09:01 -16.8 AT Up 33.6 260.5 Up 13:05:23 - 13:12:40 4132
Kingman/Dolan Springs 13:08:59 -16.0 AT Up 33.0 261.2 Up 13:05:20 - 13:12:37 4109
DCO 13:08:56 -15.3 AT Up 32.2 261.9 Up 13:05:17 - 13:12:34 4108
Laughlin/Bullhead City 13:09:00 -16.4 AT Up 33.4 260.9 Up 13:05:21 - 13:12:38 4103
CPSLO 13:09:17 -21.2 Dark Up 38.2 256.7 Up 13:05:38 - 13:12:55 4079
Mohave Valley 13:08:59 -16.3 AT Up 33.4 261.1 Up 13:05:21 - 13:12:38 4075
Lake Havasu City 13:08:58 -16.0 AT Up 33.3 261.5 Up 13:05:20 - 13:12:37 4035
Parker 13:08:57 -15.9 AT Up 33.3 261.8 Up 13:05:19 - 13:12:36 3998
Wildwood 13:09:09 -19.3 Dark Up 36.8 259.0 Up 13:05:30 - 13:12:47 3964
Blythe 13:08:57 -16.0 AT Up 33.6 261.9 Up 13:05:18 - 13:12:35 3941
Idyllwild 13:09:03 -17.7 AT Up 35.3 260.5 Up 13:05:24 - 13:12:41 3939
Calipatria 13:08:59 -16.6 AT Up 34.5 261.7 Up 13:05:20 - 13:12:37 3883
Yuma 13:08:56 -15.8 AT Up 33.8 262.5 Up 13:05:17 - 13:12:34 3844

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, (2018/12/04 13:13UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 10.63 131
Alhena         06:37:42.8 +16:23:57  1.9  4.43 121
PPM 122607     06:31:39.4 +11:47:32  6.3  0.63 122
PPM 122633     06:32:23.3 +11:40:24  7.2  0.55 122
PPM 122703     06:34:43.4 +12:00:57  8.9  0.20 121
PPM 122659     06:33:20.8 +11:58:21 11.5  0.18 122
250112         06:33:56.9 +12:04:08 10.9       121
Positions are for J2000

Event circumstances last updated at 2017/05/19 18:07:39 UT

Marc W. Buie, Southwest Research Institute

RECON