RECON: TNO occultation with 250112

Event between (250112) 02KY14 and star UC4-511-025482 with event index number of 171093

Geocentric closest approach at 2018/12/12 10:07:17 UTC

J2000 position of star is 06:32:05.6 +12:00:07
Equinox of date position of star is 06:33:07.3 +11:59:15
Stellar brightness R=14.2, use SENSEUP=64
Star is 139 degrees from the moon. Moon is 23% illuminated.
TNO apparent brightness V=20.8

[RECON map]
TNO is 12.9 AU from the Sun and 12.0 AU from the Earth.
The TNO is moving 21.8 km/sec on the sky relative to the star, or, 9.0 arcsec/hr.
The 1-sigma error in the time of the event is 49 seconds.
The 1-sigma cross-track error in the shadow position is 572 km.
The sky-plane scale is 8702.2 km/arcsec.

The TNO has an absolute magnitude Hv=9.7
Diameter=69.2 km assuming a 5% albedo -- 3.2 sec chord
Diameter=28.2 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 250112, (2018/12/12 10:07UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:11.9 +07:24:33  0.4 10.19 129
Alhena         06:38:48.4 +16:22:54  1.9  4.60 141
PPM 122607     06:32:42.9 +11:46:38  6.3  0.24 139
PPM 122626     06:33:21.3 +12:10:32 10.6  0.19 139
250112         06:33:09.2 +11:59:13 14.2       139
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 21.7 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 10:06:07 -53.0 Dark Down 51.0 203.9 Up 10:01:33 - 10:10:40 4880
Tonasket 10:06:07 -53.1 Dark Down 51.2 204.1 Up 10:01:33 - 10:10:40 4858
Okanogan 10:06:07 -53.4 Dark Down 51.6 204.0 Up 10:01:33 - 10:10:40 4829
Brewster 10:06:08 -53.6 Dark Down 51.9 203.8 Up 10:01:34 - 10:10:41 4805
Manson/Chelan 10:06:09 -53.9 Dark Down 52.1 203.4 Up 10:01:35 - 10:10:42 4788
Entiat 10:06:09 -54.1 Dark Down 52.4 203.4 Up 10:01:35 - 10:10:42 4768
Wenatchee 10:06:09 -54.3 Dark Down 52.6 203.4 Up 10:01:36 - 10:10:43 4745
Ellensburg 10:06:10 -54.6 Dark Down 53.1 203.2 Up 10:01:36 - 10:10:43 4708
Yakima 10:06:10 -54.8 Dark Down 53.4 203.4 Up 10:01:36 - 10:10:43 4671
Toppenish/White Swan 10:06:09 -54.9 Dark Down 53.6 203.8 Up 10:01:35 - 10:10:42 4650
Pasco 10:06:05 -54.2 Dark Down 53.3 205.9 Up 10:01:31 - 10:10:38 4632
PNWRO 10:06:04 -54.1 Dark Down 53.5 206.4 Up 10:01:30 - 10:10:37 4608
George/Umatilla 10:06:05 -54.5 Dark Down 53.7 205.7 Up 10:01:32 - 10:10:39 4602
Goldendale 10:06:10 -55.4 Dark Down 54.2 203.4 Up 10:01:37 - 10:10:44 4600
The Dalles 10:06:11 -55.7 Dark Down 54.5 203.0 Up 10:01:38 - 10:10:45 4581
Maupin 10:06:11 -55.9 Dark Down 54.9 203.4 Up 10:01:37 - 10:10:44 4542
Madras/Culver 10:06:11 -56.2 Dark Down 55.4 203.6 Up 10:01:37 - 10:10:44 4490
Sisters 10:06:12 -56.6 Dark Down 55.8 203.1 Up 10:01:39 - 10:10:46 4461
Redmond 10:06:11 -56.4 Dark Down 55.7 203.8 Up 10:01:37 - 10:10:44 4457
Bend 10:06:11 -56.5 Dark Down 56.0 203.7 Up 10:01:38 - 10:10:45 4437
Oregon Observatory 10:06:12 -56.7 Dark Down 56.2 203.5 Up 10:01:38 - 10:10:45 4421
La Pine/Gilchrist 10:06:12 -56.8 Dark Down 56.4 203.6 Up 10:01:39 - 10:10:46 4402
North Lake 10:06:10 -56.7 Dark Down 56.6 204.8 Up 10:01:36 - 10:10:43 4357
Paisley 10:06:08 -56.7 Dark Down 57.0 205.8 Up 10:01:35 - 10:10:42 4302
Chiloquin 10:06:13 -57.6 Dark Down 57.5 203.6 Up 10:01:40 - 10:10:47 4297
Klamath Falls 10:06:13 -57.7 Dark Down 57.8 204.0 Up 10:01:39 - 10:10:46 4264
Lakeview 10:06:07 -56.8 Dark Down 57.4 206.5 Up 10:01:34 - 10:10:41 4252
Tulelake 10:06:12 -57.6 Dark Down 57.9 204.7 Up 10:01:38 - 10:10:45 4236
Cedarville 10:06:07 -56.9 Dark Down 57.9 207.2 Up 10:01:33 - 10:10:40 4187
Fall River/Burney 10:06:11 -57.9 Dark Down 58.7 205.5 Up 10:01:37 - 10:10:44 4147
Susanville 10:06:08 -57.7 Dark Down 59.1 207.2 Up 10:01:35 - 10:10:42 4080
Greenville 10:06:09 -58.0 Dark Down 59.4 206.9 Up 10:01:36 - 10:10:43 4055
Gimple 10:06:09 -57.9 Dark Down 59.4 207.1 Up 10:01:35 - 10:10:42 4054
Quincy 10:06:09 -58.1 Dark Down 59.6 207.1 Up 10:01:36 - 10:10:43 4035
Portola 10:06:07 -57.8 Dark Down 59.5 208.0 Up 10:01:34 - 10:10:41 4019
Niwot 10:05:12 -46.5 Dark Down 51.9 230.6 Up 10:00:39 - 10:09:46 4000
Reno 10:06:05 -57.4 Dark Down 59.5 209.4 Up 10:01:31 - 10:10:38 3989
Carson City 10:06:05 -57.5 Dark Down 59.8 209.7 Up 10:01:31 - 10:10:38 3953
Yerington 10:06:02 -57.1 Dark Down 59.8 211.0 Up 10:01:29 - 10:10:36 3930
Gardnerville 10:06:04 -57.6 Dark Down 60.0 210.0 Up 10:01:31 - 10:10:38 3929
Hawthorne 10:06:00 -56.9 Dark Down 59.9 212.4 Up 10:01:26 - 10:10:33 3881
Lee Vining 10:06:02 -57.4 Dark Down 60.6 212.0 Up 10:01:28 - 10:10:35 3827
Tonopah 10:05:55 -56.0 Dark Down 59.7 215.2 Up 10:01:21 - 10:10:28 3827
Bishop 10:05:59 -57.0 Dark Down 60.8 213.9 Up 10:01:25 - 10:10:32 3763
Beatty 10:05:52 -55.9 Dark Down 60.4 217.2 Up 10:01:19 - 10:10:26 3708
Lone Pine 10:05:57 -57.0 Dark Down 61.3 215.2 Up 10:01:24 - 10:10:31 3684
Indian Springs 10:05:48 -55.2 Dark Down 60.2 219.3 Up 10:01:15 - 10:10:22 3669
Henderson 10:05:45 -54.7 Dark Down 60.2 221.1 Up 10:01:11 - 10:10:18 3612
CPSLO 10:06:07 -59.3 Dark Down 63.5 211.8 Up 10:01:33 - 10:10:40 3566
Searchlight/Boulder City 10:05:45 -54.8 Dark Down 60.6 221.9 Up 10:01:11 - 10:10:18 3553
Patrick 10:05:41 -54.0 Dark Down 60.1 223.6 Up 10:01:07 - 10:10:14 3543
Kingman/Dolan Springs 10:05:41 -54.1 Dark Down 60.3 223.6 Up 10:01:08 - 10:10:15 3521
Laughlin/Bullhead City 10:05:43 -54.6 Dark Down 60.7 222.8 Up 10:01:10 - 10:10:17 3520
DCO 10:05:38 -53.4 Dark Down 59.9 225.1 Up 10:01:04 - 10:10:11 3509
Mohave Valley 10:05:43 -54.6 Dark Down 60.8 223.1 Up 10:01:10 - 10:10:17 3492
Lake Havasu City 10:05:42 -54.5 Dark Down 61.0 224.0 Up 10:01:08 - 10:10:15 3450
Wildwood 10:05:59 -58.0 Dark Down 63.6 217.1 Up 10:01:25 - 10:10:32 3429
Parker 10:05:41 -54.5 Dark Down 61.2 224.5 Up 10:01:08 - 10:10:15 3413
Idyllwild 10:05:51 -56.5 Dark Down 62.9 221.0 Up 10:01:18 - 10:10:25 3382
Blythe 10:05:43 -54.8 Dark Down 61.8 224.7 Up 10:01:09 - 10:10:16 3360
Calipatria 10:05:46 -55.6 Dark Down 62.7 223.8 Up 10:01:13 - 10:10:20 3313
Yuma 10:05:42 -54.9 Dark Down 62.5 225.9 Up 10:01:09 - 10:10:16 3264

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, (2018/12/12 10:07UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 10.19 129
Alhena         06:37:42.8 +16:23:57  1.9  4.60 141
PPM 122607     06:31:39.4 +11:47:32  6.3  0.24 139
PPM 122626     06:32:17.6 +12:11:26 10.6  0.19 139
250112         06:32:05.6 +12:00:07 14.2       139
Positions are for J2000

Event circumstances last updated at 2018/05/24 02:01:15 UT

Marc W. Buie, Southwest Research Institute

RECON