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 13:14:45 UTC

J2000 position of star is 07:03:51.1 +26:56:09
Equinox of date position of star is 07:04:57.9 +26:54:29
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 142 seconds.
The 1-sigma cross-track error in the shadow position is 1168 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         07:46:28.6 +27:58:44  1.1  9.25 115
39 Gem         06:59:57.6 +26:03:16  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 12.9 km RECON observability=1.0 and success probability=6.8%
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 12:59:58 - 13:24:33 3276
Tonasket 13:12:15 -25.0 Dark Up 30.4 277.3 Up 12:59:58 - 13:24:33 3261
Okanogan 13:12:14 -25.0 Dark Up 30.5 277.4 Up 12:59:57 - 13:24:32 3233
Brewster 13:12:13 -25.1 Dark Up 30.6 277.4 Up 12:59:56 - 13:24:31 3207
Niwot 13:11:39 -13.2 AT Up 18.6 289.9 Really Low 12:59:22 - 13:23:57 3201
Manson/Chelan 13:12:13 -25.4 Dark Up 30.8 277.3 Up 12:59:55 - 13:24:30 3180
Entiat 13:12:12 -25.4 Dark Up 30.8 277.3 Up 12:59:55 - 13:24:30 3163
Wenatchee 13:12:12 -25.4 Dark Up 30.9 277.4 Up 12:59:54 - 13:24:29 3142
Ellensburg 13:12:10 -25.5 Dark Up 31.0 277.5 Up 12:59:52 - 13:24:27 3105
Pasco 13:12:06 -24.5 Dark Up 29.9 278.9 Low 12:59:49 - 13:24:24 3104
PNWRO 13:12:05 -24.3 Dark Up 29.7 279.2 Low 12:59:48 - 13:24:23 3095
Yakima 13:12:08 -25.5 Dark Up 30.9 277.7 Up 12:59:51 - 13:24:26 3076
George/Umatilla 13:12:05 -24.6 Dark Up 30.0 278.9 Up 12:59:47 - 13:24:22 3072
Toppenish/White Swan 13:12:08 -25.3 Dark Up 30.8 278.0 Up 12:59:50 - 13:24:25 3067
Goldendale 13:12:06 -25.6 Dark Up 31.0 278.0 Up 12:59:48 - 13:24:23 3013
The Dalles 13:12:05 -25.8 Dark Up 31.2 277.9 Up 12:59:48 - 13:24:23 2983
Maupin 13:12:04 -25.7 Dark Up 31.1 278.2 Up 12:59:47 - 13:24:22 2957
Madras/Culver 13:12:02 -25.6 Dark Up 31.1 278.5 Up 12:59:45 - 13:24:20 2916
Redmond 13:12:01 -25.6 Dark Up 31.1 278.7 Up 12:59:44 - 13:24:19 2887
Sisters 13:12:01 -25.9 Dark Up 31.3 278.4 Up 12:59:44 - 13:24:19 2874
Bend 13:12:01 -25.7 Dark Up 31.1 278.7 Up 12:59:43 - 13:24:18 2866
Oregon Observatory 13:12:00 -25.8 Dark Up 31.2 278.8 Up 12:59:43 - 13:24:18 2849
La Pine/Gilchrist 13:11:59 -25.8 Dark Up 31.2 278.8 Up 12:59:42 - 13:24:17 2831
North Lake 13:11:57 -25.3 Dark Up 30.7 279.5 Up 12:59:40 - 13:24:15 2821
Paisley 13:11:55 -25.0 Dark Up 30.4 280.0 Up 12:59:37 - 13:24:12 2794
Lakeview 13:11:53 -24.7 Dark Up 30.1 280.4 Up 12:59:36 - 13:24:11 2763
Chiloquin 13:11:56 -25.9 Dark Up 31.3 279.3 Up 12:59:38 - 13:24:13 2734
Cedarville 13:11:51 -24.5 Dark Up 29.9 280.9 Low 12:59:33 - 13:24:08 2720
Klamath Falls 13:11:55 -25.8 Dark Up 31.2 279.5 Up 12:59:37 - 13:24:12 2711
Tulelake 13:11:54 -25.5 Dark Up 30.9 279.9 Up 12:59:36 - 13:24:11 2702
Fall River/Burney 13:11:50 -25.3 Dark Up 30.7 280.4 Up 12:59:33 - 13:24:08 2636
Susanville 13:11:48 -24.7 Dark Up 30.1 281.2 Up 12:59:30 - 13:24:05 2616
Gimple 13:11:47 -24.8 Dark Up 30.2 281.3 Up 12:59:29 - 13:24:04 2586
Greenville 13:11:47 -24.9 Dark Up 30.2 281.2 Up 12:59:29 - 13:24:04 2583
Reno 13:11:44 -23.9 Dark Up 29.3 282.2 Low 12:59:27 - 13:24:02 2581
Portola 13:11:46 -24.4 Dark Up 29.8 281.7 Low 12:59:28 - 13:24:03 2576
Tonopah 13:11:37 -21.6 Dark Up 27.0 284.3 Low 12:59:20 - 13:23:55 2570
Quincy 13:11:47 -24.8 Dark Up 30.2 281.3 Up 12:59:29 - 13:24:04 2567
Yerington 13:11:42 -23.3 Dark Up 28.6 282.8 Low 12:59:25 - 13:24:00 2564
Carson City 13:11:43 -23.8 Dark Up 29.2 282.4 Low 12:59:26 - 13:24:01 2554
Hawthorne 13:11:40 -22.8 Dark Up 28.1 283.3 Low 12:59:22 - 13:23:57 2549
Gardnerville 13:11:42 -23.8 Dark Up 29.1 282.5 Low 12:59:25 - 13:24:00 2537
Indian Springs 13:11:32 -20.1 Dark Up 25.4 285.8 Low 12:59:14 - 13:23:49 2517
DCO 13:11:26 -17.8 AT Up 23.1 287.6 Low 12:59:08 - 13:23:43 2507
Henderson 13:11:30 -19.5 Dark Up 24.7 286.4 Low 12:59:12 - 13:23:47 2504
Patrick 13:11:27 -18.4 Dark Up 23.7 287.2 Low 12:59:10 - 13:23:45 2501
Beatty 13:11:33 -21.0 Dark Up 26.3 285.1 Low 12:59:16 - 13:23:51 2498
Lee Vining 13:11:39 -23.1 Dark Up 28.4 283.4 Low 12:59:21 - 13:23:56 2485
Kingman/Dolan Springs 13:11:26 -18.5 Dark Up 23.8 287.2 Low 12:59:09 - 13:23:44 2475
Bishop 13:11:36 -22.4 Dark Up 27.7 284.1 Low 12:59:19 - 13:23:54 2467
Searchlight/Boulder City 13:11:28 -19.3 Dark Up 24.5 286.6 Low 12:59:11 - 13:23:46 2461
Laughlin/Bullhead City 13:11:27 -18.9 Dark Up 24.2 286.9 Low 12:59:09 - 13:23:44 2452
Mohave Valley 13:11:26 -18.8 Dark Up 24.1 287.0 Low 12:59:08 - 13:23:43 2430
Lone Pine 13:11:33 -22.0 Dark Up 27.3 284.6 Low 12:59:16 - 13:23:51 2420
Lake Havasu City 13:11:25 -18.5 Dark Up 23.8 287.3 Low 12:59:07 - 13:23:42 2409
Parker 13:11:24 -18.4 Dark Up 23.7 287.5 Low 12:59:06 - 13:23:41 2382
Blythe 13:11:22 -18.5 Dark Up 23.7 287.6 Low 12:59:05 - 13:23:40 2326
Yuma 13:11:20 -18.3 Dark Up 23.5 287.9 Low 12:59:02 - 13:23:37 2249
Calipatria 13:11:21 -19.1 Dark Up 24.3 287.4 Low 12:59:04 - 13:23:39 2246
Idyllwild 13:11:24 -20.3 Dark Up 25.5 286.6 Low 12:59:07 - 13:23:42 2245
CPSLO 13:11:32 -23.8 Dark Up 29.0 284.0 Low 12:59:15 - 13:23:50 2206
Wildwood 13:11:27 -21.9 Dark Up 27.1 285.6 Low 12:59:09 - 13:23:44 2194

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  9.25 115
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 2017/12/05 19:09:33 UT

Marc W. Buie, Southwest Research Institute

RECON