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 06:34:57.1 +12:03:14
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 52 seconds.
The 1-sigma cross-track error in the shadow position is 594 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 13:09:42 -22.7 Dark Up 33.1 248.4 Up 13:04:53 - 13:14:31 5427
Tonasket 13:09:42 -22.7 Dark Up 33.2 248.5 Up 13:04:53 - 13:14:31 5406
Okanogan 13:09:41 -22.8 Dark Up 33.4 248.6 Up 13:04:52 - 13:14:30 5374
Brewster 13:09:41 -22.9 Dark Up 33.6 248.6 Up 13:04:52 - 13:14:30 5348
Manson/Chelan 13:09:41 -23.1 Dark Up 33.9 248.4 Up 13:04:52 - 13:14:30 5327
Entiat 13:09:41 -23.1 Dark Up 34.1 248.5 Up 13:04:52 - 13:14:30 5306
Wenatchee 13:09:40 -23.1 Dark Up 34.2 248.5 Up 13:04:51 - 13:14:29 5282
Ellensburg 13:09:40 -23.2 Dark Up 34.5 248.6 Up 13:04:51 - 13:14:29 5242
Yakima 13:09:39 -23.2 Dark Up 34.7 248.8 Up 13:04:50 - 13:14:28 5203
Toppenish/White Swan 13:09:38 -23.0 Dark Up 34.6 249.1 Up 13:04:49 - 13:14:27 5184
Pasco 13:09:35 -22.1 Dark Up 33.9 250.3 Up 13:04:46 - 13:14:24 5178
PNWRO 13:09:34 -21.9 Dark Up 33.8 250.7 Up 13:04:45 - 13:14:23 5155
George/Umatilla 13:09:35 -22.2 Dark Up 34.1 250.3 Up 13:04:46 - 13:14:24 5145
Goldendale 13:09:38 -23.2 Dark Up 35.1 249.1 Up 13:04:49 - 13:14:27 5129
The Dalles 13:09:38 -23.4 Dark Up 35.4 248.9 Up 13:04:49 - 13:14:27 5106
Maupin 13:09:37 -23.3 Dark Up 35.5 249.3 Up 13:04:48 - 13:14:26 5066
Madras/Culver 13:09:36 -23.3 Dark Up 35.7 249.6 Up 13:04:47 - 13:14:25 5014
Sisters 13:09:36 -23.5 Dark Up 36.1 249.5 Up 13:04:47 - 13:14:25 4979
Redmond 13:09:36 -23.2 Dark Up 35.9 249.8 Up 13:04:47 - 13:14:25 4979
Bend 13:09:36 -23.3 Dark Up 36.1 249.8 Up 13:04:47 - 13:14:25 4957
Oregon Observatory 13:09:35 -23.4 Dark Up 36.2 249.8 Up 13:04:46 - 13:14:24 4940
La Pine/Gilchrist 13:09:35 -23.4 Dark Up 36.3 249.9 Up 13:04:46 - 13:14:24 4920
North Lake 13:09:32 -22.9 Dark Up 36.1 250.7 Up 13:04:43 - 13:14:21 4880
Paisley 13:09:31 -22.5 Dark Up 36.0 251.4 Up 13:04:42 - 13:14:20 4827
Chiloquin 13:09:34 -23.5 Dark Up 36.9 250.4 Up 13:04:45 - 13:14:23 4809
Lakeview 13:09:29 -22.3 Dark Up 36.0 251.9 Up 13:04:40 - 13:14:18 4778
Klamath Falls 13:09:33 -23.4 Dark Up 37.0 250.7 Up 13:04:44 - 13:14:22 4776
Tulelake 13:09:31 -23.1 Dark Up 36.9 251.1 Up 13:04:42 - 13:14:20 4750
Cedarville 13:09:27 -22.1 Dark Up 36.1 252.5 Up 13:04:38 - 13:14:16 4714
Niwot 13:08:51 -10.9 CT Up 25.4 264.4 Low 13:04:02 - 13:13:40 4685
Fall River/Burney 13:09:29 -22.9 Dark Up 37.1 251.9 Up 13:04:40 - 13:14:18 4660
Susanville 13:09:26 -22.2 Dark Up 36.8 252.9 Up 13:04:37 - 13:14:15 4600
Gimple 13:09:26 -22.3 Dark Up 37.0 252.9 Up 13:04:37 - 13:14:15 4571
Greenville 13:09:27 -22.4 Dark Up 37.1 252.9 Up 13:04:38 - 13:14:16 4571
Quincy 13:09:26 -22.3 Dark Up 37.1 253.0 Up 13:04:37 - 13:14:15 4551
Portola 13:09:25 -22.0 Dark Up 36.8 253.5 Up 13:04:36 - 13:14:14 4540
Reno 13:09:23 -21.4 Dark Up 36.4 254.2 Up 13:04:34 - 13:14:12 4517
Carson City 13:09:22 -21.3 Dark Up 36.5 254.5 Up 13:04:33 - 13:14:11 4481
Yerington 13:09:20 -20.8 Dark Up 36.1 255.1 Up 13:04:31 - 13:14:09 4464
Gardnerville 13:09:21 -21.3 Dark Up 36.5 254.7 Up 13:04:32 - 13:14:10 4456
Hawthorne 13:09:17 -20.3 Dark Up 35.8 255.8 Up 13:04:28 - 13:14:06 4420
Tonopah 13:09:13 -19.2 Dark Up 34.9 257.2 Up 13:04:24 - 13:14:02 4380
Lee Vining 13:09:17 -20.6 Dark Up 36.3 255.8 Up 13:04:28 - 13:14:06 4360
Bishop 13:09:14 -19.9 Dark Up 35.9 256.8 Up 13:04:25 - 13:14:03 4302
Beatty 13:09:10 -18.5 Dark Up 34.8 258.3 Up 13:04:21 - 13:13:59 4265
Indian Springs 13:09:06 -17.6 AT Up 34.0 259.3 Up 13:04:17 - 13:13:55 4238
Lone Pine 13:09:12 -19.5 Dark Up 35.8 257.6 Up 13:04:23 - 13:14:01 4226
Henderson 13:09:03 -17.0 AT Up 33.5 260.1 Up 13:04:14 - 13:13:52 4188
Patrick 13:08:59 -15.9 AT Up 32.8 261.2 Up 13:04:10 - 13:13:48 4131
Searchlight/Boulder City 13:09:03 -16.8 AT Up 33.6 260.5 Up 13:04:14 - 13:13:52 4129
Kingman/Dolan Springs 13:08:59 -16.0 AT Up 32.9 261.2 Up 13:04:10 - 13:13:48 4107
DCO 13:08:57 -15.3 AT Up 32.2 261.9 Up 13:04:08 - 13:13:46 4105
Laughlin/Bullhead City 13:09:01 -16.4 AT Up 33.4 260.9 Up 13:04:12 - 13:13:50 4101
CPSLO 13:09:17 -21.2 Dark Up 38.2 256.7 Up 13:04:28 - 13:14:06 4078
Mohave Valley 13:09:00 -16.3 AT Up 33.4 261.1 Up 13:04:11 - 13:13:49 4073
Lake Havasu City 13:08:59 -16.0 AT Up 33.3 261.5 Up 13:04:10 - 13:13:48 4033
Parker 13:08:58 -15.9 AT Up 33.3 261.8 Up 13:04:09 - 13:13:47 3996
Wildwood 13:09:10 -19.3 Dark Up 36.8 259.0 Up 13:04:21 - 13:13:59 3962
Blythe 13:08:58 -16.0 AT Up 33.6 261.9 Up 13:04:09 - 13:13:47 3939
Idyllwild 13:09:04 -17.7 AT Up 35.3 260.5 Up 13:04:15 - 13:13:53 3937
Calipatria 13:09:00 -16.6 AT Up 34.5 261.7 Up 13:04:11 - 13:13:49 3881
Yuma 13:08:57 -15.8 AT Up 33.8 262.5 Up 13:04:08 - 13:13:46 3842

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 2017/12/05 19:05:32 UT

Marc W. Buie, Southwest Research Institute

RECON