RECON: TNO occultation with 143991

Event between (143991) 03YO179 and star GA1200:02268819 with event index number of 1639276

Geocentric closest approach at 2020/12/13 03:54:25 UTC

J2000 position of star is 06:05:48.4 +31:49:00
Equinox of date position of star is 06:07:05.2 +31:48:49
Stellar brightness G=15.0, use SENSEUP=128
Star is 148 degrees from the moon. Moon is 3% illuminated.
TNO apparent brightness V=21.9

[RECON map]
TNO is 39.6 AU from the Sun and 38.6 AU from the Earth.
The TNO is moving 25.2 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 441 seconds.
The 1-sigma cross-track error in the shadow position is 4375 km.
The sky-plane scale is 28016.9 km/arcsec.

The TNO has an absolute magnitude Hv=5.9
Diameter=398.1 km assuming a 5% albedo -- 15.8 sec chord
Diameter=162.5 km assuming a 30% albedo -- 6.4 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 143991, (2020/12/13 03:54UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:35.8 +27:58:26  1.1 21.84 127
Alnath         05:27:37.1 +28:37:24  1.6  9.12 157
PPM 071108     06:02:31.3 +31:02:01  6.0  1.26 149
PPM 071236     06:08:33.3 +32:11:46  8.5  0.48 148
PPM 071207     06:07:20.2 +31:56:50  8.8  0.14 148
143991         06:07:10.2 +31:48:49 15.0       148
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 2.0 sigma about the mid-time.
The median site spacing is 21.6 km RECON observability=1.0 and success probability=10.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 03:57:11 -37.5 Dark Down 36.7 82.2 Up 03:42:11 - 04:12:11 -1801
Summerland 03:57:12 -37.4 Dark Down 36.5 81.8 Up 03:42:12 - 04:12:12 -1817
Penticton 03:57:12 -37.5 Dark Down 36.5 81.8 Up 03:42:12 - 04:12:12 -1826
Okanagan Falls 03:57:12 -37.5 Dark Down 36.5 81.6 Up 03:42:12 - 04:12:12 -1842
Oliver 03:57:13 -37.5 Dark Down 36.5 81.5 Up 03:42:13 - 04:12:13 -1856
Anarchist Mountain Observatory 03:57:13 -37.7 Dark Down 36.6 81.5 Up 03:42:13 - 04:12:13 -1878
Oroville 03:57:14 -37.6 Dark Down 36.5 81.4 Up 03:42:14 - 04:12:14 -1881
Tonasket 03:57:14 -37.7 Dark Down 36.5 81.3 Up 03:42:14 - 04:12:14 -1901
Okanogan 03:57:15 -37.6 Dark Down 36.3 80.9 Up 03:42:15 - 04:12:15 -1925
Brewster 03:57:16 -37.5 Dark Down 36.2 80.6 Up 03:42:16 - 04:12:16 -1942
Manson/Chelan 03:57:17 -37.3 Dark Down 35.9 80.2 Up 03:42:17 - 04:12:17 -1947
Wenatchee 03:57:19 -37.2 Dark Down 35.7 79.8 Up 03:42:19 - 04:12:19 -1982
Ellensburg 03:57:20 -37.1 Dark Down 35.5 79.3 Up 03:42:20 - 04:12:20 -2010
Yakima 03:57:21 -37.1 Dark Down 35.4 79.0 Up 03:42:21 - 04:12:21 -2045
Toppenish/White Swan 03:57:22 -37.3 Dark Down 35.5 79.0 Up 03:42:22 - 04:12:22 -2069
Goldendale 03:57:23 -37.0 Dark Down 35.1 78.4 Up 03:42:23 - 04:12:23 -2102
The Dalles 03:57:24 -36.8 Dark Down 34.8 78.0 Up 03:42:24 - 04:12:24 -2109
Pasco 03:57:20 -38.2 Dark Down 36.3 79.7 Up 03:42:20 - 04:12:20 -2125
Maupin 03:57:25 -36.9 Dark Down 34.8 77.8 Up 03:42:25 - 04:12:25 -2149
PNWRO 03:57:21 -38.3 Dark Down 36.4 79.7 Up 03:42:21 - 04:12:21 -2154
Madras/Culver 03:57:27 -36.9 Dark Down 34.6 77.4 Up 03:42:27 - 04:12:27 -2196
Sisters 03:57:28 -36.6 Dark Down 34.2 76.9 Up 03:42:28 - 04:12:28 -2208
Redmond 03:57:28 -36.9 Dark Down 34.5 77.1 Up 03:42:28 - 04:12:28 -2225
Bend 03:57:29 -36.8 Dark Down 34.4 76.9 Up 03:42:29 - 04:12:29 -2239
Oregon Observatory 03:57:29 -36.7 Dark Down 34.2 76.7 Up 03:42:29 - 04:12:29 -2249
La Pine/Gilchrist 03:57:30 -36.7 Dark Down 34.1 76.5 Up 03:42:30 - 04:12:30 -2265
North Lake 03:57:30 -37.1 Dark Down 34.5 76.6 Up 03:42:30 - 04:12:30 -2326
Chiloquin 03:57:33 -36.5 Dark Down 33.6 75.6 Up 03:42:33 - 04:12:33 -2350
Klamath Falls 03:57:34 -36.5 Dark Down 33.6 75.4 Up 03:42:34 - 04:12:34 -2384
Paisley 03:57:31 -37.4 Dark Down 34.6 76.4 Up 03:42:31 - 04:12:31 -2389
Tulelake 03:57:34 -36.7 Dark Down 33.8 75.4 Up 03:42:34 - 04:12:34 -2420
Lakeview 03:57:32 -37.6 Dark Down 34.6 76.2 Up 03:42:32 - 04:12:32 -2442
Fall River/Burney 03:57:36 -36.8 Dark Down 33.6 74.9 Up 03:42:36 - 04:12:36 -2505
Cedarville 03:57:33 -37.7 Dark Down 34.6 75.8 Up 03:42:33 - 04:12:33 -2508
Susanville 03:57:37 -37.4 Dark Down 34.0 74.9 Up 03:42:37 - 04:12:37 -2591
Greenville 03:57:38 -37.2 Dark Down 33.7 74.5 Up 03:42:38 - 04:12:38 -2605
Gimple 03:57:37 -37.2 Dark Down 33.7 74.6 Up 03:42:37 - 04:12:37 -2608
Quincy 03:57:38 -37.2 Dark Down 33.6 74.4 Up 03:42:38 - 04:12:38 -2623
Portola 03:57:38 -37.5 Dark Down 34.0 74.6 Up 03:42:38 - 04:12:38 -2654
Reno 03:57:37 -38.0 Dark Down 34.4 74.7 Up 03:42:37 - 04:12:37 -2704
Carson City 03:57:38 -38.0 Dark Down 34.3 74.5 Up 03:42:38 - 04:12:38 -2738
Gardnerville 03:57:39 -38.1 Dark Down 34.3 74.4 Up 03:42:39 - 04:12:39 -2762
Yerington 03:57:38 -38.5 Dark Down 34.7 74.7 Up 03:42:38 - 04:12:38 -2781
Hawthorne 03:57:38 -39.0 Dark Down 35.0 74.6 Up 03:42:38 - 04:12:38 -2845
Lee Vining 03:57:40 -38.6 Dark Down 34.5 74.0 Up 03:42:40 - 04:12:40 -2878
Tonopah 03:57:37 -40.1 Dark Down 35.9 75.0 Up 03:42:37 - 04:12:37 -2944
Bishop 03:57:40 -39.1 Dark Down 34.9 73.9 Up 03:42:40 - 04:12:40 -2963
Lone Pine 03:57:41 -39.4 Dark Down 34.9 73.6 Up 03:42:41 - 04:12:41 -3048
CPSLO 03:57:48 -37.2 Dark Down 32.5 71.7 Up 03:42:48 - 04:12:48 -3065
Beatty 03:57:39 -40.4 Dark Down 36.0 74.4 Up 03:42:39 - 04:12:39 -3071
Indian Springs 03:57:38 -41.3 Dark Down 36.7 74.6 Up 03:42:38 - 04:12:38 -3145
SwRI 03:57:12 -49.0 Dark Down 45.3 82.5 Up 03:42:12 - 04:12:12 -3177
Henderson 03:57:38 -41.8 Dark Down 37.1 74.5 Up 03:42:38 - 04:12:38 -3223
Wildwood 03:57:47 -38.9 Dark Down 33.8 71.7 Up 03:42:47 - 04:12:47 -3265
Searchlight/Boulder City 03:57:38 -41.9 Dark Down 37.0 74.1 Up 03:42:38 - 04:12:38 -3281
Laughlin/Bullhead City 03:57:39 -42.2 Dark Down 37.2 74.1 Up 03:42:39 - 04:12:39 -3324
Patrick 03:57:37 -42.8 Dark Down 37.8 74.5 Up 03:42:37 - 04:12:37 -3327
Kingman/Dolan Springs 03:57:37 -42.6 Dark Down 37.6 74.3 Up 03:42:37 - 04:12:37 -3342
Mohave Valley 03:57:39 -42.2 Dark Down 37.1 73.9 Up 03:42:39 - 04:12:39 -3350
Idyllwild 03:57:45 -40.4 Dark Down 35.1 72.2 Up 03:42:45 - 04:12:45 -3378
Lake Havasu City 03:57:39 -42.4 Dark Down 37.2 73.7 Up 03:42:39 - 04:12:39 -3399
Parker 03:57:40 -42.4 Dark Down 37.2 73.4 Up 03:42:40 - 04:12:40 -3435
Blythe 03:57:41 -42.1 Dark Down 36.8 72.9 Up 03:42:41 - 04:12:41 -3474
Calipatria 03:57:44 -41.3 Dark Down 35.9 72.2 Up 03:42:44 - 04:12:44 -3485
Yuma 03:57:43 -42.1 Dark Down 36.5 72.3 Up 03:42:43 - 04:12:43 -3563
George/Scottsdale 03:57:36 -44.4 Dark Down 39.0 74.0 Up 03:42:36 - 04:12:36 -3571

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 143991, (2020/12/13 03:54UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 21.84 127
Alnath         05:26:17.5 +28:36:23  1.6  9.12 157
PPM 071108     06:01:10.0 +31:02:04  6.0  1.26 149
PPM 071236     06:07:11.3 +32:12:00  8.5  0.48 148
PPM 071207     06:05:58.3 +31:57:02  8.8  0.14 148
143991         06:05:48.4 +31:49:00 15.0       148
Positions are for J2000

Event circumstances last updated at 2019/09/01 22:26:49 UT

Marc W. Buie, Southwest Research Institute

RECON