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 06:07:07.3 +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=26.0

[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 4374 km.
The sky-plane scale is 28016.9 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=416.9 km assuming a 5% albedo -- 2.4 sec chord
Diameter=170.2 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 143991, (2020/12/13 03:54UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:35.7 +27:58:26  1.1 21.84 127
Alnath         05:27:37.1 +28:37:23  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 20.6 km RECON observability=1.0 and success probability=10.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Clarence Fulton 03:57:10 -37.5 Dark Down 36.8 82.5 Up 03:42:10 - 04:12:10 -1774
Victoria 03:57:19 -35.1 Dark Down 33.9 78.5 Up 03:42:19 - 04:12:19 -1781
Peachland 03:57:12 -37.3 Dark Down 36.4 81.8 Up 03:42:12 - 04:12:12 -1801
Kelowna 03:57:11 -37.5 Dark Down 36.6 82.1 Up 03:42:11 - 04:12:11 -1802
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
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 -1877
Tonasket 03:57:14 -37.7 Dark Down 36.5 81.3 Up 03:42:14 - 04:12:14 -1901
Okanogan 03:57:16 -37.6 Dark Down 36.3 80.9 Up 03:42:16 - 04:12:16 -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
Entiat 03:57:18 -37.3 Dark Down 35.8 80.0 Up 03:42:18 - 04:12:18 -1963
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 03:57:22 -37.1 Dark Down 35.4 79.0 Up 03:42:22 - 04:12:22 -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 03:57:26 -36.9 Dark Down 34.8 77.8 Up 03:42:26 - 04:12:26 -2149
PNWRO 03:57:21 -38.3 Dark Down 36.4 79.7 Up 03:42:21 - 04:12:21 -2154
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
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
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 -2504
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 -2604
Gimple 03:57:37 -37.2 Dark Down 33.7 74.6 Up 03:42:37 - 04:12:37 -2608
Quincy 03:57:39 -37.2 Dark Down 33.6 74.4 Up 03:42:39 - 04:12:39 -2623
Portola 03:57:38 -37.5 Dark Down 34.0 74.6 Up 03:42:38 - 04:12:38 -2653
Reno 03:57:38 -38.0 Dark Down 34.4 74.7 Up 03:42:38 - 04:12:38 -2703
Carson City 03:57:39 -38.0 Dark Down 34.3 74.5 Up 03:42:39 - 04:12:39 -2737
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 -2780
Hawthorne 03:57:38 -39.0 Dark Down 35.0 74.6 Up 03:42:38 - 04:12:38 -2844
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 -2943
Bishop 03:57:40 -39.1 Dark Down 34.9 73.9 Up 03:42:40 - 04:12:40 -2963
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 03:57:37 -41.3 Dark Down 36.7 74.6 Up 03:42:37 - 04:12:37 -3145
Niwot 03:57:11 -49.1 Dark Down 45.4 82.7 Up 03:42:11 - 04:12:11 -3170
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 -3341
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 -3377
DCO 03:57:36 -43.3 Dark Down 38.3 74.6 Up 03:42:36 - 04:12:36 -3384
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 2020/03/11 21:36:51 UT

Marc W. Buie, Southwest Research Institute

RECON