RECON: TNO occultation with 450265

Event between (450265) 03WU172 and star UC4-585-036352 with event index number of 172985

Geocentric closest approach at 2019/01/01 13:14:44 UTC

J2000 position of star is 07:03:51.1 +26:56:09
Equinox of date position of star is 07:04:54.4 +26:54:34
Stellar brightness R=16.3, use SENSEUP=128
Star is 125 degrees from the moon. Moon is 19% illuminated.
TNO apparent brightness V=20.9

[RECON map]
TNO is 29.2 AU from the Sun and 28.2 AU from the Earth.
The TNO is moving 24.1 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 103 seconds.
The 1-sigma cross-track error in the shadow position is 1096 km.
The sky-plane scale is 20473.8 km/arcsec.

The TNO has an absolute magnitude Hv=6.3
Diameter=331.1 km assuming a 5% albedo -- 13.8 sec chord
Diameter=135.2 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 450265, (2019/01/01 13:15UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:28.7 +27:58:44  1.1  9.26 115
39 Gem         06:59:57.6 +26:03:15  6.5  1.42 126
PPM 096908     07:02:46.7 +26:32:42  8.4  0.62 125
PPM 096961     07:04:47.7 +26:58:34  9.1  0.09 125
450265         07:05:01.9 +26:54:23 16.3       124
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 12.5 km RECON observability=1.0 and success probability=6.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 13:12:16 -25.0 Dark Up 30.5 277.2 Up 13:03:09 - 13:21:23 3286
Tonasket 13:12:15 -25.0 Dark Up 30.4 277.3 Up 13:03:08 - 13:21:22 3271
Okanogan 13:12:14 -25.0 Dark Up 30.5 277.4 Up 13:03:07 - 13:21:21 3243
Brewster 13:12:13 -25.1 Dark Up 30.6 277.4 Up 13:03:06 - 13:21:20 3218
Niwot 13:11:39 -13.2 AT Up 18.6 289.9 Really Low 13:02:32 - 13:20:46 3213
Manson/Chelan 13:12:12 -25.4 Dark Up 30.8 277.3 Up 13:03:05 - 13:21:19 3191
Entiat 13:12:12 -25.4 Dark Up 30.9 277.3 Up 13:03:05 - 13:21:19 3173
Wenatchee 13:12:11 -25.4 Dark Up 30.9 277.4 Up 13:03:04 - 13:21:18 3152
Ellensburg 13:12:09 -25.5 Dark Up 31.0 277.5 Up 13:03:02 - 13:21:16 3116
Pasco 13:12:05 -24.5 Dark Up 29.9 278.9 Low 13:02:58 - 13:21:12 3114
PNWRO 13:12:05 -24.3 Dark Up 29.7 279.2 Low 13:02:58 - 13:21:12 3105
Yakima 13:12:08 -25.5 Dark Up 30.9 277.7 Up 13:03:01 - 13:21:15 3087
George/Umatilla 13:12:05 -24.6 Dark Up 30.0 278.9 Up 13:02:58 - 13:21:12 3083
Toppenish/White Swan 13:12:07 -25.3 Dark Up 30.8 278.0 Up 13:03:00 - 13:21:14 3077
Goldendale 13:12:05 -25.6 Dark Up 31.0 278.0 Up 13:02:58 - 13:21:12 3023
The Dalles 13:12:05 -25.8 Dark Up 31.2 277.9 Up 13:02:58 - 13:21:12 2994
Maupin 13:12:04 -25.7 Dark Up 31.1 278.2 Up 13:02:57 - 13:21:11 2968
Madras/Culver 13:12:02 -25.6 Dark Up 31.1 278.5 Up 13:02:55 - 13:21:09 2926
Redmond 13:12:01 -25.6 Dark Up 31.1 278.7 Up 13:02:54 - 13:21:08 2899
Sisters 13:12:01 -25.9 Dark Up 31.3 278.4 Up 13:02:54 - 13:21:08 2886
Bend 13:12:01 -25.7 Dark Up 31.1 278.7 Up 13:02:54 - 13:21:08 2878
Oregon Observatory 13:12:00 -25.8 Dark Up 31.2 278.8 Up 13:02:53 - 13:21:07 2860
La Pine/Gilchrist 13:11:59 -25.8 Dark Up 31.2 278.8 Up 13:02:52 - 13:21:06 2843
North Lake 13:11:58 -25.3 Dark Up 30.7 279.5 Up 13:02:51 - 13:21:05 2833
Paisley 13:11:55 -25.0 Dark Up 30.4 280.0 Up 13:02:48 - 13:21:02 2805
Lakeview 13:11:53 -24.7 Dark Up 30.1 280.4 Up 13:02:46 - 13:21:00 2775
Chiloquin 13:11:56 -25.9 Dark Up 31.3 279.3 Up 13:02:49 - 13:21:03 2746
Cedarville 13:11:51 -24.5 Dark Up 29.9 280.9 Low 13:02:44 - 13:20:58 2732
Klamath Falls 13:11:54 -25.8 Dark Up 31.2 279.5 Up 13:02:47 - 13:21:01 2723
Tulelake 13:11:54 -25.5 Dark Up 30.9 279.9 Up 13:02:47 - 13:21:01 2714
Fall River/Burney 13:11:50 -25.3 Dark Up 30.7 280.4 Up 13:02:43 - 13:20:57 2647
Susanville 13:11:48 -24.7 Dark Up 30.1 281.2 Up 13:02:41 - 13:20:55 2628
Gimple 13:11:47 -24.8 Dark Up 30.2 281.3 Up 13:02:40 - 13:20:54 2598
Greenville 13:11:47 -24.9 Dark Up 30.2 281.2 Up 13:02:40 - 13:20:54 2595
Reno 13:11:44 -23.9 Dark Up 29.3 282.2 Low 13:02:37 - 13:20:51 2593
Portola 13:11:46 -24.4 Dark Up 29.8 281.7 Low 13:02:39 - 13:20:53 2588
Tonopah 13:11:37 -21.6 Dark Up 27.0 284.3 Low 13:02:30 - 13:20:44 2583
Quincy 13:11:47 -24.8 Dark Up 30.2 281.3 Up 13:02:40 - 13:20:54 2579
Yerington 13:11:42 -23.3 Dark Up 28.7 282.8 Low 13:02:35 - 13:20:49 2577
Carson City 13:11:43 -23.8 Dark Up 29.2 282.4 Low 13:02:36 - 13:20:50 2566
Hawthorne 13:11:40 -22.8 Dark Up 28.1 283.3 Low 13:02:33 - 13:20:47 2562
Gardnerville 13:11:42 -23.8 Dark Up 29.1 282.5 Low 13:02:35 - 13:20:49 2549
Indian Springs 13:11:32 -20.1 Dark Up 25.4 285.8 Low 13:02:25 - 13:20:39 2529
DCO 13:11:25 -17.8 AT Up 23.1 287.6 Low 13:02:18 - 13:20:32 2519
Henderson 13:11:29 -19.5 Dark Up 24.7 286.4 Low 13:02:22 - 13:20:36 2516
Patrick 13:11:27 -18.4 Dark Up 23.7 287.2 Low 13:02:20 - 13:20:34 2513
Beatty 13:11:33 -21.0 Dark Up 26.3 285.1 Low 13:02:26 - 13:20:40 2510
Lee Vining 13:11:38 -23.1 Dark Up 28.4 283.4 Low 13:02:31 - 13:20:45 2498
Kingman/Dolan Springs 13:11:26 -18.5 Dark Up 23.8 287.2 Low 13:02:19 - 13:20:33 2488
Bishop 13:11:36 -22.4 Dark Up 27.7 284.1 Low 13:02:29 - 13:20:43 2480
Searchlight/Boulder City 13:11:28 -19.3 Dark Up 24.5 286.6 Low 13:02:21 - 13:20:35 2473
Laughlin/Bullhead City 13:11:26 -18.9 Dark Up 24.2 286.9 Low 13:02:19 - 13:20:33 2464
Mohave Valley 13:11:26 -18.8 Dark Up 24.1 287.0 Low 13:02:19 - 13:20:33 2442
Lone Pine 13:11:33 -22.0 Dark Up 27.3 284.6 Low 13:02:26 - 13:20:40 2433
Lake Havasu City 13:11:24 -18.5 Dark Up 23.8 287.3 Low 13:02:17 - 13:20:31 2421
Parker 13:11:23 -18.4 Dark Up 23.7 287.5 Low 13:02:16 - 13:20:30 2394
Blythe 13:11:22 -18.5 Dark Up 23.7 287.6 Low 13:02:15 - 13:20:29 2339
Yuma 13:11:19 -18.3 Dark Up 23.5 287.9 Low 13:02:12 - 13:20:26 2262
Calipatria 13:11:21 -19.2 Dark Up 24.3 287.4 Low 13:02:14 - 13:20:28 2258
Idyllwild 13:11:24 -20.3 Dark Up 25.5 286.6 Low 13:02:17 - 13:20:31 2258
CPSLO 13:11:32 -23.8 Dark Up 29.0 284.0 Low 13:02:25 - 13:20:39 2218
Wildwood 13:11:26 -21.9 Dark Up 27.1 285.6 Low 13:02:19 - 13:20:33 2206

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 450265, (2019/01/01 13:15UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.1 +28:01:33  1.1  9.26 115
39 Gem         06:58:47.2 +26:04:53  6.5  1.42 126
PPM 096908     07:01:36.0 +26:34:24  8.4  0.62 125
PPM 096961     07:03:36.8 +27:00:20  9.1  0.09 125
450265         07:03:51.1 +26:56:09 16.3       125
Positions are for J2000

Event circumstances last updated at 2017/01/01 19:09:09 UT

Marc W. Buie, Southwest Research Institute

RECON