RECON: TNO occultation with 12XW159

Event between 12XW159 and star GA0940:01013146 with event index number of 1559409

Geocentric closest approach at 2021/02/01 08:35:10 UTC

J2000 position of star is 05:57:30.7 +05:24:43
Equinox of date position of star is 05:58:35.4 +05:24:47
Stellar brightness G=14.5, use SENSEUP=128
Star is 91 degrees from the moon. Moon is 85% illuminated.
TNO apparent brightness V=25.1

[RECON map]
TNO is 31.9 AU from the Sun and 31.2 AU from the Earth.
The TNO is moving 18.2 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 230 seconds.
The 1-sigma cross-track error in the shadow position is 2799 km.
The sky-plane scale is 22632.9 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=204.2 km assuming a 5% albedo -- 3.3 sec chord
Diameter=83.4 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 12XW159, (2021/02/01 08:35UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.8 +07:24:33  0.4  2.08  91
Bellatrix      05:26:15.8 +06:22:01  1.6  8.11  98
PPM 149639     05:56:03.1 +05:51:47  6.4  0.79  91
PPM 149705     05:59:25.4 +05:30:09  8.5  0.22  90
12XW159        05:58:38.3 +05:24:47 14.5        90
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 3.9 sigma about the mid-time.
The median site spacing is 9.6 km RECON observability=1.0 and success probability=8.6%
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 08:34:13 -56.4 Dark Up 27.9 242.0 Low 08:19:13 - 08:49:13 1315
Kelowna 08:34:11 -56.8 Dark Up 28.2 242.1 Low 08:19:11 - 08:49:11 1295
Peachland 08:34:11 -57.0 Dark Up 28.4 241.8 Low 08:19:11 - 08:49:11 1283
Summerland 08:34:10 -57.1 Dark Up 28.4 242.0 Low 08:19:10 - 08:49:10 1279
Penticton 08:34:10 -57.1 Dark Up 28.4 242.1 Low 08:19:10 - 08:49:10 1278
Oliver 08:34:08 -57.5 Dark Up 28.5 242.3 Low 08:19:08 - 08:49:08 1263
Anarchist Mountain Observatory 08:34:08 -57.6 Dark Up 28.5 242.5 Low 08:19:08 - 08:49:08 1261
Tonasket 08:34:05 -58.0 Dark Up 28.7 242.6 Low 08:19:05 - 08:49:05 1244
Okanogan 08:34:04 -58.3 Dark Up 28.9 242.6 Low 08:19:04 - 08:49:04 1225
Brewster 08:34:03 -58.6 Dark Up 29.2 242.6 Low 08:19:03 - 08:49:03 1208
Manson/Chelan 08:34:03 -58.8 Dark Up 29.5 242.3 Low 08:19:03 - 08:49:03 1189
Entiat 08:34:02 -59.1 Dark Up 29.6 242.4 Low 08:19:02 - 08:49:02 1177
Wenatchee 08:34:01 -59.3 Dark Up 29.8 242.4 Low 08:19:01 - 08:49:01 1163
Niwot 08:32:54 -61.3 Dark Up 22.2 257.9 Low 08:17:54 - 08:47:54 1143
Victoria 08:34:13 -58.4 Dark Up 31.1 239.0 Up 08:19:13 - 08:49:13 1140
Ellensburg 08:33:59 -59.8 Dark Up 30.2 242.4 Up 08:18:59 - 08:48:59 1138
Pasco 08:33:53 -60.3 Dark Up 29.6 244.1 Low 08:18:53 - 08:48:53 1136
SwRI 08:32:53 -61.4 Dark Up 22.2 257.9 Low 08:17:53 - 08:47:53 1135
PNWRO 08:33:51 -60.5 Dark Up 29.6 244.4 Low 08:18:51 - 08:48:51 1129
Yakima 08:33:58 -60.2 Dark Up 30.4 242.6 Up 08:18:58 - 08:48:58 1117
Toppenish/White Swan 08:33:56 -60.4 Dark Up 30.4 242.9 Up 08:18:56 - 08:48:56 1111
Goldendale 08:33:54 -61.0 Dark Up 30.9 242.8 Up 08:18:54 - 08:48:54 1072
The Dalles 08:33:54 -61.2 Dark Up 31.2 242.6 Up 08:18:54 - 08:48:54 1051
Maupin 08:33:52 -61.6 Dark Up 31.3 242.9 Up 08:18:52 - 08:48:52 1033
Redmond 08:33:48 -62.5 Dark Up 31.8 243.3 Up 08:18:48 - 08:48:48 983
Sisters 08:33:49 -62.5 Dark Up 32.1 242.9 Up 08:18:49 - 08:48:49 974
Bend 08:33:47 -62.8 Dark Up 32.0 243.3 Up 08:18:47 - 08:48:47 968
Oregon Observatory 08:33:47 -62.9 Dark Up 32.2 243.2 Up 08:18:47 - 08:48:47 955
La Pine/Gilchrist 08:33:46 -63.1 Dark Up 32.3 243.3 Up 08:18:46 - 08:48:46 943
North Lake 08:33:42 -63.5 Dark Up 32.1 244.1 Up 08:18:42 - 08:48:42 935
Paisley 08:33:39 -64.0 Dark Up 32.1 244.7 Up 08:18:39 - 08:48:39 914
Lakeview 08:33:36 -64.5 Dark Up 32.2 245.1 Up 08:18:36 - 08:48:36 891
Cedarville 08:33:32 -65.1 Dark Up 32.4 245.6 Up 08:18:32 - 08:48:32 858
Klamath Falls 08:33:40 -64.6 Dark Up 33.1 243.9 Up 08:18:40 - 08:48:40 855
Fall River/Burney 08:33:33 -65.8 Dark Up 33.4 244.9 Up 08:18:33 - 08:48:33 797
Susanville 08:33:28 -66.3 Dark Up 33.2 245.9 Up 08:18:28 - 08:48:28 780
Gimple 08:33:28 -66.6 Dark Up 33.4 245.9 Up 08:18:28 - 08:48:28 758
Greenville 08:33:28 -66.6 Dark Up 33.5 245.8 Up 08:18:28 - 08:48:28 756
Reno 08:33:22 -67.0 Dark Up 33.0 247.1 Up 08:18:22 - 08:48:22 752
Portola 08:33:25 -66.9 Dark Up 33.3 246.4 Up 08:18:25 - 08:48:25 750
Quincy 08:33:27 -66.8 Dark Up 33.6 245.9 Up 08:18:27 - 08:48:27 744
Yerington 08:33:18 -67.4 Dark Up 32.7 247.9 Up 08:18:18 - 08:48:18 737
Tonopah 08:33:08 -67.9 Dark Up 31.7 250.0 Up 08:18:08 - 08:48:08 733
Carson City 08:33:20 -67.4 Dark Up 33.1 247.3 Up 08:18:20 - 08:48:20 731
Hawthorne 08:33:14 -67.8 Dark Up 32.5 248.6 Up 08:18:14 - 08:48:14 723
Gardnerville 08:33:19 -67.6 Dark Up 33.1 247.5 Up 08:18:19 - 08:48:19 717
Indian Springs 08:32:58 -68.8 Dark Up 31.0 252.0 Up 08:17:58 - 08:47:58 682
Lee Vining 08:33:13 -68.4 Dark Up 33.1 248.6 Up 08:18:13 - 08:48:13 675
Beatty 08:33:02 -68.8 Dark Up 31.7 251.0 Up 08:18:02 - 08:48:02 673
Henderson 08:32:54 -69.0 Dark Up 30.7 252.8 Up 08:17:54 - 08:47:54 667
Bishop 08:33:08 -68.8 Dark Up 32.8 249.5 Up 08:18:08 - 08:48:08 657
Patrick 08:32:48 -69.2 Dark Up 30.0 253.9 Low 08:17:48 - 08:47:48 657
DCO 08:32:45 -69.1 Dark Up 29.5 254.6 Low 08:17:45 - 08:47:45 656
Kingman/Dolan Springs 08:32:47 -69.4 Dark Up 30.2 253.9 Up 08:17:47 - 08:47:47 638
Searchlight/Boulder City 08:32:51 -69.5 Dark Up 30.8 253.2 Up 08:17:51 - 08:47:51 632
Laughlin/Bullhead City 08:32:48 -69.7 Dark Up 30.6 253.6 Up 08:17:48 - 08:47:48 622
Mohave Valley 08:32:47 -69.9 Dark Up 30.7 253.7 Up 08:17:47 - 08:47:47 604
George/Scottsdale 08:32:36 -69.7 Dark Up 28.9 256.2 Low 08:17:36 - 08:47:36 600
Lake Havasu City 08:32:45 -70.1 Dark Up 30.6 254.1 Up 08:17:45 - 08:47:45 585
Parker 08:32:43 -70.4 Dark Up 30.7 254.3 Up 08:17:43 - 08:47:43 562
Blythe 08:32:41 -71.0 Dark Up 31.1 254.4 Up 08:17:41 - 08:47:41 519
Idyllwild 08:32:47 -71.8 Dark Up 32.7 252.9 Up 08:17:47 - 08:47:47 468
Calipatria 08:32:41 -71.8 Dark Up 32.0 254.1 Up 08:17:41 - 08:47:41 460
CPSLO 08:33:05 -71.3 Dark Up 35.2 249.0 Up 08:18:05 - 08:48:05 458
Yuma 08:32:37 -71.8 Dark Up 31.4 254.9 Up 08:17:37 - 08:47:37 456
Wildwood 08:32:54 -72.0 Dark Up 34.1 251.3 Up 08:17:54 - 08:47:54 438

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 12XW159, (2021/02/01 08:35UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  2.08  91
Bellatrix      05:25:07.8 +06:20:58  1.6  8.11  98
PPM 149639     05:54:55.4 +05:51:39  6.4  0.79  91
PPM 149705     05:58:17.9 +05:30:07  8.5  0.22  90
12XW159        05:57:30.7 +05:24:43 14.5        91
Positions are for J2000

Event circumstances last updated at 2020/03/10 22:59:23 UT

Marc W. Buie, Southwest Research Institute

RECON