RECON: TNO occultation with 123509

Event between (123509) 00WK183 and star UC4-558-020546 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 05:49:57.2 +21:25:35
Stellar brightness R=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 1603 seconds.
The 1-sigma cross-track error in the shadow position is 1863 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 18.0 km RECON observability=0.8 and success probability=11.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:02:38 -45.3 Dark Up 25.3 274.1 Low 10:47:38 - 11:17:38 3216
Tonasket 11:02:37 -45.4 Dark Up 25.3 274.2 Low 10:47:37 - 11:17:37 3199
Okanogan 11:02:36 -45.6 Dark Up 25.4 274.3 Low 10:47:36 - 11:17:36 3169
Brewster 11:02:35 -45.9 Dark Up 25.5 274.3 Low 10:47:35 - 11:17:35 3143
Manson/Chelan 11:02:35 -46.2 Dark Up 25.7 274.1 Low 10:47:35 - 11:17:35 3117
Entiat 11:02:34 -46.3 Dark Up 25.8 274.2 Low 10:47:34 - 11:17:34 3098
Wenatchee 11:02:33 -46.5 Dark Up 25.8 274.2 Low 10:47:33 - 11:17:33 3076
Ellensburg 11:02:32 -46.8 Dark Up 25.9 274.2 Low 10:47:32 - 11:17:32 3038
Pasco 11:02:28 -46.1 Dark Up 24.9 275.6 Low 10:47:28 - 11:17:28 3017
Yakima 11:02:30 -46.9 Dark Up 25.9 274.4 Low 10:47:30 - 11:17:30 3005
PNWRO 11:02:27 -46.1 Dark Up 24.7 275.9 Low 10:47:27 - 11:17:27 3004
Toppenish/White Swan 11:02:29 -46.9 Dark Up 25.8 274.6 Low 10:47:29 - 11:17:29 2992
George/Umatilla 11:02:27 -46.4 Dark Up 25.0 275.6 Low 10:47:27 - 11:17:27 2985
Niwot 11:02:00 -37.5 Dark Down 13.8 286.5 Really Low 10:47:00 - 11:17:00 2941
Goldendale 11:02:28 -47.4 Dark Up 26.0 274.6 Low 10:47:28 - 11:17:28 2937
The Dalles 11:02:27 -47.7 Dark Up 26.3 274.5 Low 10:47:27 - 11:17:27 2909
Maupin 11:02:26 -47.8 Dark Up 26.2 274.7 Low 10:47:26 - 11:17:26 2878
Madras/Culver 11:02:24 -48.0 Dark Up 26.2 275.0 Low 10:47:24 - 11:17:24 2832
Redmond 11:02:23 -48.2 Dark Up 26.2 275.1 Low 10:47:23 - 11:17:23 2801
Sisters 11:02:24 -48.5 Dark Up 26.5 274.8 Low 10:47:24 - 11:17:24 2792
Bend 11:02:22 -48.4 Dark Up 26.3 275.1 Low 10:47:22 - 11:17:22 2780
Oregon Observatory 11:02:22 -48.5 Dark Up 26.3 275.1 Low 10:47:22 - 11:17:22 2762
La Pine/Gilchrist 11:02:21 -48.6 Dark Up 26.4 275.2 Low 10:47:21 - 11:17:21 2743
North Lake 11:02:19 -48.4 Dark Up 25.9 275.8 Low 10:47:19 - 11:17:19 2724
Paisley 11:02:17 -48.3 Dark Up 25.6 276.3 Low 10:47:17 - 11:17:17 2688
Lakeview 11:02:15 -48.3 Dark Up 25.4 276.6 Low 10:47:15 - 11:17:15 2651
Chiloquin 11:02:18 -49.3 Dark Up 26.5 275.5 Low 10:47:18 - 11:17:18 2640
Klamath Falls 11:02:17 -49.3 Dark Up 26.4 275.7 Low 10:47:17 - 11:17:17 2613
Cedarville 11:02:13 -48.4 Dark Up 25.2 277.0 Low 10:47:13 - 11:17:13 2601
Tulelake 11:02:16 -49.2 Dark Up 26.2 276.0 Low 10:47:16 - 11:17:16 2599
Fall River/Burney 11:02:13 -49.4 Dark Up 26.0 276.5 Low 10:47:13 - 11:17:13 2524
Susanville 11:02:10 -49.1 Dark Up 25.4 277.3 Low 10:47:10 - 11:17:10 2492
Gimple 11:02:09 -49.3 Dark Up 25.5 277.3 Low 10:47:09 - 11:17:09 2462
Greenville 11:02:09 -49.4 Dark Up 25.6 277.2 Low 10:47:09 - 11:17:09 2459
Portola 11:02:08 -49.1 Dark Up 25.2 277.7 Low 10:47:08 - 11:17:08 2445
Reno 11:02:06 -48.7 Dark Up 24.7 278.2 Low 10:47:06 - 11:17:06 2442
Quincy 11:02:09 -49.4 Dark Up 25.6 277.3 Low 10:47:09 - 11:17:09 2442
Yerington 11:02:04 -48.3 Dark Up 24.1 278.8 Low 10:47:04 - 11:17:04 2414
Carson City 11:02:05 -48.8 Dark Up 24.6 278.3 Low 10:47:05 - 11:17:05 2412
Tonopah 11:01:59 -47.0 Dark Up 22.5 280.3 Low 10:46:59 - 11:16:59 2393
Gardnerville 11:02:04 -48.8 Dark Up 24.5 278.5 Low 10:47:04 - 11:17:04 2392
Hawthorne 11:02:02 -48.0 Dark Up 23.6 279.3 Low 10:47:02 - 11:17:02 2390
Lee Vining 11:02:01 -48.5 Dark Up 23.9 279.3 Low 10:47:01 - 11:17:01 2325
Indian Springs 11:01:53 -46.1 Dark Up 21.0 281.7 Low 10:46:53 - 11:16:53 2312
Beatty 11:01:55 -46.9 Dark Up 21.9 281.0 Low 10:46:55 - 11:16:55 2307
Bishop 11:01:58 -48.1 Dark Up 23.3 279.9 Low 10:46:58 - 11:16:58 2296
Henderson 11:01:51 -45.6 Dark Up 20.3 282.2 Low 10:46:51 - 11:16:51 2288
Patrick 11:01:48 -44.8 Dark Down 19.3 283.0 Really Low 10:46:48 - 11:16:48 2269
DCO 11:01:47 -44.2 Dark Down 18.7 283.5 Really Low 10:46:47 - 11:16:47 2265
Kingman/Dolan Springs 11:01:48 -45.0 Dark Down 19.4 283.0 Really Low 10:46:48 - 11:16:48 2243
Searchlight/Boulder City 11:01:49 -45.6 Dark Up 20.2 282.5 Low 10:46:49 - 11:16:49 2239
Lone Pine 11:01:55 -48.0 Dark Up 22.9 280.4 Low 10:46:55 - 11:16:55 2239
Laughlin/Bullhead City 11:01:48 -45.4 Dark Down 19.8 282.8 Really Low 10:46:48 - 11:16:48 2224
Mohave Valley 11:01:48 -45.4 Dark Down 19.8 282.9 Really Low 10:46:48 - 11:16:48 2200
Lake Havasu City 11:01:46 -45.2 Dark Down 19.5 283.1 Really Low 10:46:46 - 11:16:46 2173
Parker 11:01:45 -45.2 Dark Down 19.4 283.2 Really Low 10:46:45 - 11:16:45 2142
Blythe 11:01:44 -45.5 Dark Down 19.5 283.3 Really Low 10:46:44 - 11:16:44 2085
CPSLO 11:01:55 -50.3 Dark Up 24.7 279.6 Low 10:46:55 - 11:16:55 2040
Idyllwild 11:01:46 -47.3 Dark Up 21.3 282.2 Low 10:46:46 - 11:16:46 2025
Calipatria 11:01:43 -46.4 Dark Down 20.2 283.0 Low 10:46:43 - 11:16:43 2010
Yuma 11:01:41 -45.6 Dark Down 19.3 283.6 Really Low 10:46:41 - 11:16:41 2000
Wildwood 11:01:49 -48.8 Dark Up 22.9 281.1 Low 10:46:49 - 11:16:49 1996

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 +28:36:24  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 2017/12/05 19:11:18 UT

Marc W. Buie, Southwest Research Institute

RECON