RECON: TNO occultation with 123509

Event between (123509) 00WK183 and star GA1100:01452343 with event index number of 175428

Geocentric closest approach at 2019/01/17 11:05:44 UTC

J2000 position of star is 05:48:52.7 +21:25:19
Equinox of date position of star is 05:49:59.1 +21:25:36
Stellar brightness G=14.5, use SENSEUP=128
Star is 22 degrees from the moon. Moon is 81% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 42.6 AU from the Sun and 41.8 AU from the Earth.
The TNO is moving 21.8 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 1600 seconds.
The 1-sigma cross-track error in the shadow position is 1862 km.
The sky-plane scale is 30291.4 km/arcsec.

The TNO has an absolute magnitude Hv=6.6
Diameter=288.4 km assuming a 5% albedo -- 13.2 sec chord
Diameter=117.7 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 123509, (2019/01/17 11:06UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.2 +07:24:33  0.4 14.10  26
Alnath         05:27:29.8 +28:37:18  1.6  8.82  19
54Chi1Ori      05:55:30.7 +20:16:41  5.1  1.72  23
PPM 094925     05:50:21.2 +21:08:26  7.1  0.30  22
PPM 094937     05:50:39.9 +21:18:58  9.5  0.19  22
123509         05:50:01.2 +21:25:36 14.5        22
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 0.6 sigma about the mid-time.
The median site spacing is 18.7 km RECON observability=0.9 and success probability=11.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 11:00:38 -45.4 Dark Up 25.8 273.4 Low 10:45:38 - 11:15:38 1254
Oroville 11:00:35 -45.6 Dark Up 25.7 273.8 Low 10:45:35 - 11:15:35 1212
Tonasket 11:00:35 -45.7 Dark Up 25.6 273.9 Low 10:45:35 - 11:15:35 1194
Okanogan 11:00:34 -45.9 Dark Up 25.7 273.9 Low 10:45:34 - 11:15:34 1165
Brewster 11:00:33 -46.2 Dark Up 25.8 273.9 Low 10:45:33 - 11:15:33 1138
Manson/Chelan 11:00:32 -46.5 Dark Up 26.1 273.7 Low 10:45:32 - 11:15:32 1112
Entiat 11:00:31 -46.6 Dark Up 26.1 273.8 Low 10:45:31 - 11:15:31 1093
Wenatchee 11:00:31 -46.8 Dark Up 26.2 273.8 Low 10:45:31 - 11:15:31 1071
Ellensburg 11:00:30 -47.1 Dark Up 26.3 273.9 Low 10:45:30 - 11:15:30 1033
Pasco 11:00:26 -46.5 Dark Up 25.3 275.2 Low 10:45:26 - 11:15:26 1012
Yakima 11:00:28 -47.3 Dark Up 26.3 274.1 Low 10:45:28 - 11:15:28 1000
PNWRO 11:00:24 -46.4 Dark Up 25.1 275.5 Low 10:45:24 - 11:15:24 999
Toppenish/White Swan 11:00:27 -47.2 Dark Up 26.1 274.3 Low 10:45:27 - 11:15:27 987
George/Umatilla 11:00:24 -46.7 Dark Up 25.4 275.2 Low 10:45:24 - 11:15:24 980
Niwot 10:59:57 -37.9 Dark Down 14.2 286.2 Really Low 10:44:57 - 11:14:57 934
Goldendale 11:00:26 -47.7 Dark Up 26.4 274.3 Low 10:45:26 - 11:15:26 931
The Dalles 11:00:25 -48.1 Dark Up 26.6 274.1 Low 10:45:25 - 11:15:25 903
Maupin 11:00:24 -48.1 Dark Up 26.5 274.4 Low 10:45:24 - 11:15:24 872
Madras/Culver 11:00:22 -48.4 Dark Up 26.5 274.6 Low 10:45:22 - 11:15:22 826
Redmond 11:00:20 -48.5 Dark Up 26.5 274.8 Low 10:45:20 - 11:15:20 796
Sisters 11:00:21 -48.8 Dark Up 26.8 274.5 Low 10:45:21 - 11:15:21 786
Bend 11:00:20 -48.7 Dark Up 26.6 274.8 Low 10:45:20 - 11:15:20 774
Oregon Observatory 11:00:20 -48.9 Dark Up 26.7 274.8 Low 10:45:20 - 11:15:20 756
La Pine/Gilchrist 11:00:19 -49.0 Dark Up 26.7 274.8 Low 10:45:19 - 11:15:19 737
North Lake 11:00:17 -48.7 Dark Up 26.3 275.5 Low 10:45:17 - 11:15:17 718
Paisley 11:00:15 -48.7 Dark Up 26.0 275.9 Low 10:45:15 - 11:15:15 682
Lakeview 11:00:13 -48.7 Dark Up 25.8 276.3 Low 10:45:13 - 11:15:13 645
Chiloquin 11:00:16 -49.6 Dark Up 26.9 275.2 Low 10:45:16 - 11:15:16 634
Klamath Falls 11:00:15 -49.7 Dark Up 26.8 275.4 Low 10:45:15 - 11:15:15 607
Cedarville 11:00:10 -48.8 Dark Up 25.6 276.7 Low 10:45:10 - 11:15:10 595
Tulelake 11:00:13 -49.6 Dark Up 26.6 275.7 Low 10:45:13 - 11:15:13 593
Fall River/Burney 11:00:10 -49.8 Dark Up 26.4 276.2 Low 10:45:10 - 11:15:10 518
Susanville 11:00:07 -49.4 Dark Up 25.8 277.0 Low 10:45:07 - 11:15:07 485
Gimple 11:00:07 -49.7 Dark Up 25.9 277.0 Low 10:45:07 - 11:15:07 455
Greenville 11:00:07 -49.7 Dark Up 26.0 276.9 Low 10:45:07 - 11:15:07 453
Portola 11:00:06 -49.5 Dark Up 25.6 277.4 Low 10:45:06 - 11:15:06 439
Quincy 11:00:06 -49.8 Dark Up 26.0 277.0 Low 10:45:06 - 11:15:06 435
Reno 11:00:04 -49.1 Dark Up 25.1 277.9 Low 10:45:04 - 11:15:04 435
Yerington 11:00:02 -48.7 Dark Up 24.5 278.5 Low 10:45:02 - 11:15:02 407
Carson City 11:00:03 -49.1 Dark Up 25.0 278.0 Low 10:45:03 - 11:15:03 405
Tonopah 10:59:57 -47.4 Dark Up 22.9 280.0 Low 10:44:57 - 11:14:57 386
Gardnerville 11:00:02 -49.2 Dark Up 24.9 278.2 Low 10:45:02 - 11:15:02 385
Hawthorne 10:59:59 -48.4 Dark Up 24.0 279.0 Low 10:44:59 - 11:14:59 383
Lee Vining 10:59:59 -48.9 Dark Up 24.3 279.0 Low 10:44:59 - 11:14:59 318
Indian Springs 10:59:51 -46.5 Dark Up 21.4 281.4 Low 10:44:51 - 11:14:51 305
Beatty 10:59:53 -47.3 Dark Up 22.3 280.7 Low 10:44:53 - 11:14:53 299
Bishop 10:59:56 -48.5 Dark Up 23.7 279.6 Low 10:44:56 - 11:14:56 288
Henderson 10:59:49 -46.0 Dark Up 20.7 282.0 Low 10:44:49 - 11:14:49 280
Patrick 10:59:46 -45.2 Dark Down 19.7 282.8 Really Low 10:44:46 - 11:14:46 261
DCO 10:59:45 -44.6 Dark Down 19.1 283.2 Really Low 10:44:45 - 11:14:45 257
Kingman/Dolan Springs 10:59:46 -45.4 Dark Down 19.8 282.8 Really Low 10:44:46 - 11:14:46 235
Lone Pine 10:59:53 -48.4 Dark Up 23.3 280.1 Low 10:44:53 - 11:14:53 231
Searchlight/Boulder City 10:59:47 -46.0 Dark Up 20.6 282.2 Low 10:44:47 - 11:14:47 231
Laughlin/Bullhead City 10:59:46 -45.8 Dark Up 20.2 282.5 Low 10:44:46 - 11:14:46 216
Mohave Valley 10:59:45 -45.8 Dark Up 20.2 282.6 Low 10:44:45 - 11:14:45 192
Lake Havasu City 10:59:44 -45.7 Dark Down 19.9 282.9 Really Low 10:44:44 - 11:14:44 165
Parker 10:59:43 -45.7 Dark Down 19.8 283.0 Really Low 10:44:43 - 11:14:43 134
Blythe 10:59:41 -46.0 Dark Down 19.9 283.0 Really Low 10:44:41 - 11:14:41 77
CPSLO 10:59:52 -50.7 Dark Up 25.1 279.3 Low 10:44:52 - 11:14:52 32
Idyllwild 10:59:44 -47.7 Dark Up 21.7 282.0 Low 10:44:44 - 11:14:44 17
Calipatria 10:59:41 -46.8 Dark Up 20.6 282.8 Low 10:44:41 - 11:14:41 2
Yuma 10:59:39 -46.1 Dark Down 19.8 283.3 Really Low 10:44:39 - 11:14:39 -8
Wildwood 10:59:47 -49.2 Dark Up 23.3 280.9 Low 10:44:47 - 11:14:47 -12

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 123509, (2019/01/17 11:06UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.10  26
Alnath         05:26:17.5 +28:36:23  1.6  8.82  19
54Chi1Ori      05:54:22.7 +20:16:33  5.1  1.72  23
PPM 094925     05:49:12.8 +21:08:09  7.1  0.30  22
PPM 094937     05:49:31.4 +21:18:42  9.5  0.19  22
123509         05:48:52.7 +21:25:19 14.5        22
Positions are for J2000

Event circumstances last updated at 2018/06/11 19:32:41 UT

Marc W. Buie, Southwest Research Institute

RECON