RECON: TNO occultation with 123509

Event between (123509) 00WK183 and star GA1100:01470627 with event index number of 170323

Geocentric closest approach at 2019/01/05 10:50:05 UTC

J2000 position of star is 05:49:49.6 +21:25:20
Equinox of date position of star is 05:50:57.7 +21:25:36
Stellar brightness G=15.7, use SENSEUP=128
Star is 170 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=22.9

[RECON map]
TNO is 42.6 AU from the Sun and 41.7 AU from the Earth.
The TNO is moving 24.4 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 249 seconds.
The 1-sigma cross-track error in the shadow position is 1598 km.
The sky-plane scale is 30232.8 km/arcsec.

The TNO has an absolute magnitude Hv=6.6
Diameter=288.4 km assuming a 5% albedo -- 11.8 sec chord
Diameter=117.7 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 123509, (2019/01/05 10:50UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.1 +07:24:33  0.4 14.07 163
Alnath         05:27:29.7 +28:37:18  1.6  8.94 163
54Chi1Ori      05:55:30.6 +20:16:41  5.1  1.56 171
PPM 094925     05:50:21.0 +21:08:26  7.1  0.32 169
PPM 094937     05:50:39.8 +21:18:58  9.5  0.13 170
123509         05:50:58.0 +21:25:36 15.7       170
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 3.6 sigma about the mid-time.
The median site spacing is 20.0 km RECON observability=1.0 and success probability=22.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 10:47:39 -47.9 Dark Down 35.5 261.3 Up 10:32:39 - 11:02:39 -336
Summerland 10:47:39 -48.1 Dark Down 35.7 261.1 Up 10:32:39 - 11:02:39 -348
Penticton 10:47:38 -48.1 Dark Down 35.7 261.4 Up 10:32:38 - 11:02:38 -370
Okanagan Falls 10:47:37 -48.2 Dark Down 35.7 261.6 Up 10:32:37 - 11:02:37 -387
Oliver 10:47:37 -48.3 Dark Down 35.7 261.7 Up 10:32:37 - 11:02:37 -400
Anarchist Mountain Observatory 10:47:36 -48.2 Dark Down 35.6 262.0 Up 10:32:36 - 11:02:36 -410
Oroville 10:47:36 -48.3 Dark Down 35.7 262.0 Up 10:32:36 - 11:02:36 -418
Tonasket 10:47:35 -48.4 Dark Down 35.7 262.1 Up 10:32:35 - 11:02:35 -438
Okanogan 10:47:35 -48.6 Dark Down 35.9 262.2 Up 10:32:35 - 11:02:35 -469
Brewster 10:47:34 -48.8 Dark Down 36.0 262.3 Up 10:32:34 - 11:02:34 -497
Manson/Chelan 10:47:34 -49.2 Dark Down 36.3 262.1 Up 10:32:34 - 11:02:34 -524
Entiat 10:47:33 -49.3 Dark Down 36.4 262.2 Up 10:32:33 - 11:02:33 -544
Wenatchee 10:47:33 -49.5 Dark Down 36.5 262.3 Up 10:32:33 - 11:02:33 -568
Ellensburg 10:47:32 -49.8 Dark Down 36.7 262.5 Up 10:32:32 - 11:02:32 -609
Pasco 10:47:28 -49.1 Dark Down 35.8 264.1 Up 10:32:28 - 11:02:28 -640
Yakima 10:47:31 -49.9 Dark Down 36.8 262.7 Up 10:32:31 - 11:02:31 -645
PNWRO 10:47:27 -49.1 Dark Down 35.7 264.5 Up 10:32:27 - 11:02:27 -656
Toppenish/White Swan 10:47:30 -49.9 Dark Down 36.7 263.0 Up 10:32:30 - 11:02:30 -660
George/Umatilla 10:47:27 -49.4 Dark Down 36.0 264.2 Up 10:32:27 - 11:02:27 -674
Goldendale 10:47:29 -50.4 Dark Down 37.0 263.1 Up 10:32:29 - 11:02:29 -718
The Dalles 10:47:30 -50.7 Dark Down 37.3 263.0 Up 10:32:30 - 11:02:30 -747
Maupin 10:47:28 -50.8 Dark Down 37.3 263.4 Up 10:32:28 - 11:02:28 -781
Niwot 10:46:52 -40.6 Dark Down 25.7 277.2 Low 10:31:52 - 11:01:52 -799
Madras/Culver 10:47:27 -51.0 Dark Down 37.4 263.8 Up 10:32:27 - 11:02:27 -831
Redmond 10:47:26 -51.2 Dark Down 37.5 264.0 Up 10:32:26 - 11:02:26 -864
Sisters 10:47:27 -51.5 Dark Down 37.8 263.7 Up 10:32:27 - 11:02:27 -872
Bend 10:47:26 -51.4 Dark Down 37.6 264.0 Up 10:32:26 - 11:02:26 -887
Oregon Observatory 10:47:25 -51.5 Dark Down 37.7 264.1 Up 10:32:25 - 11:02:25 -906
La Pine/Gilchrist 10:47:25 -51.6 Dark Down 37.8 264.2 Up 10:32:25 - 11:02:25 -926
North Lake 10:47:23 -51.4 Dark Down 37.4 265.0 Up 10:32:23 - 11:02:23 -950
Paisley 10:47:21 -51.3 Dark Down 37.2 265.6 Up 10:32:21 - 11:02:21 -992
Lakeview 10:47:19 -51.3 Dark Down 37.1 266.2 Up 10:32:19 - 11:02:19 -1033
Chiloquin 10:47:23 -52.3 Dark Down 38.2 264.8 Up 10:32:23 - 11:02:23 -1036
Klamath Falls 10:47:22 -52.3 Dark Down 38.1 265.1 Up 10:32:22 - 11:02:22 -1065
Tulelake 10:47:21 -52.2 Dark Down 37.9 265.5 Up 10:32:21 - 11:02:21 -1083
Cedarville 10:47:17 -51.4 Dark Down 37.0 266.8 Up 10:32:17 - 11:02:17 -1089
Fall River/Burney 10:47:18 -52.4 Dark Down 37.9 266.3 Up 10:32:18 - 11:02:18 -1165
Susanville 10:47:15 -52.1 Dark Down 37.4 267.3 Up 10:32:15 - 11:02:15 -1204
Gimple 10:47:14 -52.3 Dark Down 37.6 267.3 Up 10:32:14 - 11:02:14 -1236
Greenville 10:47:15 -52.4 Dark Down 37.7 267.3 Up 10:32:15 - 11:02:15 -1238
Portola 10:47:13 -52.1 Dark Down 37.3 267.9 Up 10:32:13 - 11:02:13 -1256
Quincy 10:47:14 -52.4 Dark Down 37.7 267.4 Up 10:32:14 - 11:02:14 -1256
Reno 10:47:12 -51.7 Dark Down 36.8 268.5 Up 10:32:12 - 11:02:12 -1263
Carson City 10:47:11 -51.8 Dark Down 36.8 268.8 Up 10:32:11 - 11:02:11 -1296
Yerington 10:47:09 -51.3 Dark Down 36.3 269.3 Up 10:32:09 - 11:02:09 -1298
Gardnerville 10:47:10 -51.8 Dark Down 36.8 269.0 Up 10:32:10 - 11:02:10 -1318
Hawthorne 10:47:07 -51.0 Dark Down 35.9 270.0 Up 10:32:07 - 11:02:07 -1327
Tonopah 10:47:03 -50.0 Dark Down 34.8 271.2 Up 10:32:03 - 11:02:03 -1332
Lee Vining 10:47:06 -51.5 Dark Down 36.3 270.1 Up 10:32:06 - 11:02:06 -1394
Indian Springs 10:46:57 -49.1 Dark Down 33.6 273.1 Up 10:31:57 - 11:01:57 -1428
Beatty 10:47:00 -49.9 Dark Down 34.4 272.2 Up 10:32:00 - 11:02:00 -1428
Bishop 10:47:04 -51.1 Dark Down 35.7 271.0 Up 10:32:04 - 11:02:04 -1430
Henderson 10:46:55 -48.6 Dark Down 33.0 273.8 Up 10:31:55 - 11:01:55 -1459
Patrick 10:46:52 -47.8 Dark Down 32.0 274.8 Up 10:31:52 - 11:01:52 -1485
DCO 10:46:50 -47.2 Dark Down 31.4 275.4 Up 10:31:50 - 11:01:50 -1493
Lone Pine 10:47:01 -51.0 Dark Down 35.5 271.7 Up 10:32:01 - 11:02:01 -1493
Searchlight/Boulder City 10:46:53 -48.6 Dark Down 32.9 274.2 Up 10:31:53 - 11:01:53 -1511
Kingman/Dolan Springs 10:46:51 -47.9 Dark Down 32.2 274.8 Up 10:31:51 - 11:01:51 -1512
Laughlin/Bullhead City 10:46:52 -48.4 Dark Down 32.6 274.6 Up 10:31:52 - 11:01:52 -1529
Mohave Valley 10:46:51 -48.4 Dark Down 32.6 274.7 Up 10:31:51 - 11:01:51 -1555
Lake Havasu City 10:46:50 -48.2 Dark Down 32.3 275.1 Up 10:31:50 - 11:01:50 -1586
Parker 10:46:49 -48.2 Dark Down 32.3 275.4 Up 10:31:49 - 11:01:49 -1619
Blythe 10:46:48 -48.5 Dark Down 32.5 275.5 Up 10:31:48 - 11:01:48 -1678
CPSLO 10:47:03 -53.2 Dark Down 37.5 271.2 Up 10:32:03 - 11:02:03 -1691
Idyllwild 10:46:53 -50.2 Dark Down 34.2 274.4 Up 10:31:53 - 11:01:53 -1730
Wildwood 10:46:57 -51.7 Dark Down 35.8 273.2 Up 10:31:57 - 11:01:57 -1750
Calipatria 10:46:49 -49.3 Dark Down 33.2 275.4 Up 10:31:49 - 11:01:49 -1754
Yuma 10:46:47 -48.6 Dark Down 32.4 276.1 Up 10:31:47 - 11:01:47 -1769

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, (2019/01/05 10:50UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 14.07 163
Alnath         05:26:17.5 +28:36:23  1.6  8.94 163
54Chi1Ori      05:54:22.7 +20:16:32  5.1  1.56 171
PPM 094925     05:49:12.8 +21:08:09  7.1  0.32 169
PPM 094937     05:49:31.4 +21:18:42  9.5  0.13 170
123509         05:49:49.6 +21:25:20 15.7       170
Positions are for J2000

Event circumstances last updated at 2018/12/04 05:06:09 UT

Marc W. Buie, Southwest Research Institute

RECON