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 05:49:56.0 +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 1488 seconds.
The 1-sigma cross-track error in the shadow position is 1819 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 +28:37:19  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 17.8 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 3224
Tonasket 11:02:37 -45.4 Dark Up 25.3 274.2 Low 10:47:37 - 11:17:37 3207
Okanogan 11:02:36 -45.6 Dark Up 25.4 274.3 Low 10:47:36 - 11:17:36 3177
Brewster 11:02:35 -45.9 Dark Up 25.5 274.3 Low 10:47:35 - 11:17:35 3151
Manson/Chelan 11:02:35 -46.2 Dark Up 25.7 274.1 Low 10:47:35 - 11:17:35 3125
Entiat 11:02:34 -46.3 Dark Up 25.8 274.2 Low 10:47:34 - 11:17:34 3106
Wenatchee 11:02:33 -46.5 Dark Up 25.8 274.2 Low 10:47:33 - 11:17:33 3084
Ellensburg 11:02:31 -46.8 Dark Up 25.9 274.2 Low 10:47:31 - 11:17:31 3046
Pasco 11:02:27 -46.1 Dark Up 24.9 275.6 Low 10:47:27 - 11:17:27 3025
Yakima 11:02:30 -46.9 Dark Up 25.9 274.4 Low 10:47:30 - 11:17:30 3013
PNWRO 11:02:26 -46.1 Dark Up 24.7 275.9 Low 10:47:26 - 11:17:26 3012
Toppenish/White Swan 11:02:29 -46.9 Dark Up 25.8 274.6 Low 10:47:29 - 11:17:29 3000
George/Umatilla 11:02:27 -46.4 Dark Up 25.0 275.6 Low 10:47:27 - 11:17:27 2993
Niwot 11:02:00 -37.5 Dark Down 13.8 286.5 Really Low 10:47:00 - 11:17:00 2952
Goldendale 11:02:27 -47.4 Dark Up 26.0 274.6 Low 10:47:27 - 11:17:27 2945
The Dalles 11:02:27 -47.7 Dark Up 26.3 274.5 Low 10:47:27 - 11:17:27 2917
Maupin 11:02:26 -47.8 Dark Up 26.2 274.7 Low 10:47:26 - 11:17:26 2886
Madras/Culver 11:02:24 -48.0 Dark Up 26.2 275.0 Low 10:47:24 - 11:17:24 2841
Redmond 11:02:22 -48.2 Dark Up 26.2 275.1 Low 10:47:22 - 11:17:22 2810
Sisters 11:02:23 -48.5 Dark Up 26.5 274.8 Low 10:47:23 - 11:17:23 2801
Bend 11:02:22 -48.4 Dark Up 26.3 275.1 Low 10:47:22 - 11:17:22 2789
Oregon Observatory 11:02:22 -48.5 Dark Up 26.3 275.1 Low 10:47:22 - 11:17:22 2771
La Pine/Gilchrist 11:02:20 -48.6 Dark Up 26.4 275.2 Low 10:47:20 - 11:17:20 2752
North Lake 11:02:19 -48.4 Dark Up 25.9 275.8 Low 10:47:19 - 11:17:19 2733
Paisley 11:02:16 -48.3 Dark Up 25.6 276.3 Low 10:47:16 - 11:17:16 2697
Lakeview 11:02:14 -48.3 Dark Up 25.4 276.6 Low 10:47:14 - 11:17:14 2661
Chiloquin 11:02:17 -49.3 Dark Up 26.5 275.5 Low 10:47:17 - 11:17:17 2649
Klamath Falls 11:02:16 -49.3 Dark Up 26.4 275.7 Low 10:47:16 - 11:17:16 2622
Cedarville 11:02:13 -48.4 Dark Up 25.2 277.0 Low 10:47:13 - 11:17:13 2610
Tulelake 11:02:15 -49.2 Dark Up 26.2 276.0 Low 10:47:15 - 11:17:15 2608
Fall River/Burney 11:02:12 -49.4 Dark Up 26.0 276.5 Low 10:47:12 - 11:17:12 2533
Susanville 11:02:10 -49.1 Dark Up 25.4 277.3 Low 10:47:10 - 11:17:10 2501
Gimple 11:02:09 -49.3 Dark Up 25.5 277.3 Low 10:47:09 - 11:17:09 2471
Greenville 11:02:09 -49.4 Dark Up 25.6 277.2 Low 10:47:09 - 11:17:09 2469
Portola 11:02:08 -49.1 Dark Up 25.2 277.7 Low 10:47:08 - 11:17:08 2455
Reno 11:02:06 -48.7 Dark Up 24.7 278.2 Low 10:47:06 - 11:17:06 2451
Quincy 11:02:09 -49.4 Dark Up 25.6 277.3 Low 10:47:09 - 11:17:09 2451
Yerington 11:02:04 -48.3 Dark Up 24.1 278.8 Low 10:47:04 - 11:17:04 2424
Carson City 11:02:05 -48.8 Dark Up 24.6 278.3 Low 10:47:05 - 11:17:05 2421
Tonopah 11:01:59 -47.0 Dark Up 22.5 280.3 Low 10:46:59 - 11:16:59 2403
Gardnerville 11:02:04 -48.8 Dark Up 24.5 278.5 Low 10:47:04 - 11:17:04 2401
Hawthorne 11:02:02 -48.0 Dark Up 23.6 279.3 Low 10:47:02 - 11:17:02 2400
Lee Vining 11:02:00 -48.5 Dark Up 23.9 279.3 Low 10:47:00 - 11:17:00 2335
Indian Springs 11:01:53 -46.1 Dark Up 21.0 281.7 Low 10:46:53 - 11:16:53 2322
Beatty 11:01:55 -46.9 Dark Up 21.9 281.0 Low 10:46:55 - 11:16:55 2316
Bishop 11:01:58 -48.1 Dark Up 23.3 279.9 Low 10:46:58 - 11:16:58 2305
Henderson 11:01:51 -45.6 Dark Up 20.3 282.2 Low 10:46:51 - 11:16:51 2297
Patrick 11:01:48 -44.8 Dark Down 19.3 283.0 Really Low 10:46:48 - 11:16:48 2279
DCO 11:01:47 -44.2 Dark Down 18.7 283.5 Really Low 10:46:47 - 11:16:47 2275
Kingman/Dolan Springs 11:01:48 -45.0 Dark Down 19.4 283.0 Really Low 10:46:48 - 11:16:48 2253
Searchlight/Boulder City 11:01:49 -45.6 Dark Up 20.2 282.5 Low 10:46:49 - 11:16:49 2249
Lone Pine 11:01:55 -48.0 Dark Up 22.9 280.4 Low 10:46:55 - 11:16:55 2248
Laughlin/Bullhead City 11:01:48 -45.4 Dark Down 19.8 282.8 Really Low 10:46:48 - 11:16:48 2234
Mohave Valley 11:01:48 -45.4 Dark Down 19.8 282.9 Really Low 10:46:48 - 11:16:48 2210
Lake Havasu City 11:01:46 -45.2 Dark Down 19.5 283.1 Really Low 10:46:46 - 11:16:46 2182
Parker 11:01:45 -45.2 Dark Down 19.4 283.2 Really Low 10:46:45 - 11:16:45 2152
Blythe 11:01:44 -45.5 Dark Down 19.5 283.3 Really Low 10:46:44 - 11:16:44 2095
CPSLO 11:01:54 -50.3 Dark Up 24.7 279.6 Low 10:46:54 - 11:16:54 2049
Idyllwild 11:01:46 -47.3 Dark Up 21.3 282.2 Low 10:46:46 - 11:16:46 2036
Calipatria 11:01:44 -46.4 Dark Down 20.2 283.0 Low 10:46:44 - 11:16:44 2019
Yuma 11:01:41 -45.6 Dark Down 19.3 283.6 Really Low 10:46:41 - 11:16:41 2010
Wildwood 11:01:48 -48.8 Dark Up 22.9 281.1 Low 10:46:48 - 11:16:48 2006

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 2017/08/04 18:04:08 UT

Marc W. Buie, Southwest Research Institute

RECON