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 06:33:03.9 +11:59:18
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 35 seconds.
The 1-sigma cross-track error in the shadow position is 499 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 22.0 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 10:06:06 -53.0 Dark Down 51.0 203.9 Up 10:02:39 - 10:09:33 4878
Tonasket 10:06:06 -53.1 Dark Down 51.2 204.0 Up 10:02:39 - 10:09:33 4857
Okanogan 10:06:06 -53.4 Dark Down 51.6 204.0 Up 10:02:39 - 10:09:33 4827
Brewster 10:06:07 -53.6 Dark Down 51.9 203.8 Up 10:02:40 - 10:09:34 4804
Manson/Chelan 10:06:08 -53.9 Dark Down 52.1 203.4 Up 10:02:41 - 10:09:35 4787
Entiat 10:06:08 -54.1 Dark Down 52.4 203.4 Up 10:02:41 - 10:09:35 4767
Wenatchee 10:06:08 -54.3 Dark Down 52.6 203.4 Up 10:02:41 - 10:09:35 4744
Ellensburg 10:06:09 -54.6 Dark Down 53.1 203.2 Up 10:02:42 - 10:09:36 4707
Yakima 10:06:09 -54.8 Dark Down 53.4 203.4 Up 10:02:42 - 10:09:36 4669
Toppenish/White Swan 10:06:08 -54.9 Dark Down 53.6 203.8 Up 10:02:41 - 10:09:35 4648
Pasco 10:06:03 -54.2 Dark Down 53.3 205.8 Up 10:02:36 - 10:09:30 4631
PNWRO 10:06:03 -54.1 Dark Down 53.5 206.3 Up 10:02:36 - 10:09:30 4607
George/Umatilla 10:06:04 -54.5 Dark Down 53.7 205.7 Up 10:02:37 - 10:09:31 4601
Goldendale 10:06:10 -55.4 Dark Down 54.2 203.4 Up 10:02:43 - 10:09:37 4599
The Dalles 10:06:10 -55.7 Dark Down 54.5 203.0 Up 10:02:43 - 10:09:37 4580
Maupin 10:06:10 -55.9 Dark Down 54.9 203.4 Up 10:02:43 - 10:09:37 4540
Madras/Culver 10:06:10 -56.2 Dark Down 55.4 203.6 Up 10:02:43 - 10:09:37 4489
Sisters 10:06:11 -56.6 Dark Down 55.8 203.1 Up 10:02:44 - 10:09:38 4460
Redmond 10:06:10 -56.4 Dark Down 55.7 203.8 Up 10:02:43 - 10:09:37 4455
Bend 10:06:11 -56.5 Dark Down 56.0 203.7 Up 10:02:44 - 10:09:38 4436
Oregon Observatory 10:06:11 -56.7 Dark Down 56.2 203.5 Up 10:02:44 - 10:09:38 4420
La Pine/Gilchrist 10:06:11 -56.9 Dark Down 56.4 203.6 Up 10:02:44 - 10:09:38 4401
North Lake 10:06:09 -56.7 Dark Down 56.6 204.8 Up 10:02:42 - 10:09:36 4356
Paisley 10:06:07 -56.7 Dark Down 57.0 205.8 Up 10:02:40 - 10:09:34 4301
Chiloquin 10:06:12 -57.6 Dark Down 57.5 203.6 Up 10:02:45 - 10:09:39 4296
Klamath Falls 10:06:12 -57.7 Dark Down 57.8 204.0 Up 10:02:45 - 10:09:39 4263
Lakeview 10:06:07 -56.8 Dark Down 57.4 206.5 Up 10:02:40 - 10:09:34 4251
Tulelake 10:06:10 -57.6 Dark Down 57.9 204.7 Up 10:02:43 - 10:09:37 4235
Cedarville 10:06:06 -56.9 Dark Down 57.9 207.2 Up 10:02:39 - 10:09:33 4186
Fall River/Burney 10:06:10 -57.9 Dark Down 58.7 205.5 Up 10:02:43 - 10:09:37 4145
Susanville 10:06:07 -57.7 Dark Down 59.1 207.2 Up 10:02:40 - 10:09:34 4079
Greenville 10:06:08 -58.0 Dark Down 59.4 206.9 Up 10:02:41 - 10:09:35 4054
Gimple 10:06:08 -57.9 Dark Down 59.4 207.1 Up 10:02:41 - 10:09:35 4053
Quincy 10:06:08 -58.1 Dark Down 59.6 207.1 Up 10:02:41 - 10:09:35 4033
Portola 10:06:06 -57.8 Dark Down 59.5 208.0 Up 10:02:39 - 10:09:33 4018
Niwot 10:05:12 -46.5 Dark Down 51.9 230.6 Up 10:01:45 - 10:08:39 4001
Reno 10:06:03 -57.4 Dark Down 59.5 209.4 Up 10:02:36 - 10:09:30 3988
Carson City 10:06:03 -57.5 Dark Down 59.8 209.7 Up 10:02:36 - 10:09:30 3952
Yerington 10:06:01 -57.1 Dark Down 59.8 211.0 Up 10:02:34 - 10:09:28 3930
Gardnerville 10:06:03 -57.6 Dark Down 60.0 210.0 Up 10:02:36 - 10:09:30 3928
Hawthorne 10:05:59 -56.9 Dark Down 59.9 212.3 Up 10:02:32 - 10:09:26 3880
Tonopah 10:05:53 -56.0 Dark Down 59.7 215.2 Up 10:02:26 - 10:09:20 3826
Lee Vining 10:06:01 -57.4 Dark Down 60.6 212.0 Up 10:02:34 - 10:09:28 3826
Bishop 10:05:58 -57.1 Dark Down 60.8 213.9 Up 10:02:31 - 10:09:25 3762
Beatty 10:05:51 -55.9 Dark Down 60.4 217.2 Up 10:02:24 - 10:09:18 3707
Lone Pine 10:05:56 -57.0 Dark Down 61.3 215.2 Up 10:02:29 - 10:09:23 3683
Indian Springs 10:05:47 -55.2 Dark Down 60.2 219.3 Up 10:02:20 - 10:09:14 3668
Henderson 10:05:44 -54.7 Dark Down 60.2 221.1 Up 10:02:17 - 10:09:11 3611
CPSLO 10:06:06 -59.3 Dark Down 63.5 211.8 Up 10:02:39 - 10:09:33 3564
Searchlight/Boulder City 10:05:43 -54.8 Dark Down 60.6 221.8 Up 10:02:16 - 10:09:10 3552
Patrick 10:05:39 -54.0 Dark Down 60.1 223.6 Up 10:02:12 - 10:09:06 3542
Kingman/Dolan Springs 10:05:40 -54.2 Dark Down 60.4 223.6 Up 10:02:13 - 10:09:07 3520
Laughlin/Bullhead City 10:05:41 -54.6 Dark Down 60.7 222.8 Up 10:02:14 - 10:09:08 3519
DCO 10:05:36 -53.5 Dark Down 59.9 225.1 Up 10:02:09 - 10:09:03 3508
Mohave Valley 10:05:41 -54.6 Dark Down 60.9 223.1 Up 10:02:14 - 10:09:08 3491
Lake Havasu City 10:05:41 -54.5 Dark Down 61.0 224.0 Up 10:02:14 - 10:09:08 3449
Wildwood 10:05:58 -58.0 Dark Down 63.6 217.1 Up 10:02:31 - 10:09:25 3428
Parker 10:05:40 -54.5 Dark Down 61.2 224.5 Up 10:02:13 - 10:09:07 3412
Idyllwild 10:05:50 -56.5 Dark Down 62.9 220.9 Up 10:02:23 - 10:09:17 3381
Blythe 10:05:41 -54.8 Dark Down 61.8 224.7 Up 10:02:14 - 10:09:08 3359
Calipatria 10:05:45 -55.6 Dark Down 62.7 223.8 Up 10:02:18 - 10:09:12 3311
Yuma 10:05:41 -54.9 Dark Down 62.5 225.9 Up 10:02:14 - 10:09:08 3262

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 2017/05/20 18:06:01 UT

Marc W. Buie, Southwest Research Institute

RECON