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 05:58:33.2 +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=22.4

[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=7.3
Diameter=204.2 km assuming a 5% albedo -- 11.2 sec chord
Diameter=83.4 km assuming a 30% albedo -- 4.6 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 9.2 km RECON observability=1.0 and success probability=8.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:34:11 -56.8 Dark Up 28.1 242.1 Low 08:19:11 - 08:49:11 1298
Summerland 08:34:10 -57.1 Dark Up 28.4 242.0 Low 08:19:10 - 08:49:10 1278
Penticton 08:34:10 -57.1 Dark Up 28.4 242.1 Low 08:19:10 - 08:49:10 1278
Okanagan Falls 08:34:09 -57.3 Dark Up 28.5 242.2 Low 08:19:09 - 08:49:09 1269
Oliver 08:34:08 -57.5 Dark Up 28.5 242.3 Low 08:19:08 - 08:49:08 1263
Anarchist Mountain Observatory 08:34:07 -57.6 Dark Up 28.5 242.5 Low 08:19:07 - 08:49:07 1259
Oroville 08:34:06 -57.7 Dark Up 28.6 242.5 Low 08:19:06 - 08:49:06 1254
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 08:34:04 -58.6 Dark Up 29.2 242.6 Low 08:19:04 - 08:49:04 1208
Manson/Chelan 08:34:03 -58.8 Dark Up 29.5 242.3 Low 08:19:03 - 08:49:03 1189
Wenatchee 08:34:01 -59.3 Dark Up 29.8 242.4 Low 08:19:01 - 08:49:01 1162
Ellensburg 08:33:59 -59.8 Dark Up 30.2 242.4 Up 08:18:59 - 08:48:59 1137
Pasco 08:33:53 -60.3 Dark Up 29.6 244.1 Low 08:18:53 - 08:48:53 1136
SwRI 08:32:54 -61.4 Dark Up 22.2 257.9 Low 08:17:54 - 08:47:54 1134
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
George/Umatilla 08:33:51 -60.7 Dark Up 29.9 244.0 Low 08:18:51 - 08:48:51 1114
Toppenish/White Swan 08:33:56 -60.4 Dark Up 30.4 242.9 Up 08:18:56 - 08:48:56 1110
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 1032
Madras/Culver 08:33:49 -62.2 Dark Up 31.6 243.1 Up 08:18:49 - 08:48:49 1003
Redmond 08:33:48 -62.5 Dark Up 31.8 243.3 Up 08:18:48 - 08:48:48 982
Sisters 08:33:49 -62.5 Dark Up 32.1 242.9 Up 08:18:49 - 08:48:49 973
Bend 08:33:47 -62.8 Dark Up 32.0 243.3 Up 08:18:47 - 08:48:47 967
Oregon Observatory 08:33:47 -62.9 Dark Up 32.2 243.2 Up 08:18:47 - 08:48:47 954
La Pine/Gilchrist 08:33:46 -63.1 Dark Up 32.3 243.3 Up 08:18:46 - 08:48:46 942
North Lake 08:33:42 -63.5 Dark Up 32.1 244.1 Up 08:18:42 - 08:48:42 934
Paisley 08:33:39 -64.0 Dark Up 32.1 244.7 Up 08:18:39 - 08:48:39 913
Lakeview 08:33:36 -64.5 Dark Up 32.2 245.1 Up 08:18:36 - 08:48:36 890
Chiloquin 08:33:41 -64.3 Dark Up 33.0 243.6 Up 08:18:41 - 08:48:41 871
Cedarville 08:33:32 -65.1 Dark Up 32.4 245.6 Up 08:18:32 - 08:48:32 857
Klamath Falls 08:33:40 -64.6 Dark Up 33.1 243.9 Up 08:18:40 - 08:48:40 853
Tulelake 08:33:38 -64.9 Dark Up 33.1 244.3 Up 08:18:38 - 08:48:38 846
Fall River/Burney 08:33:33 -65.8 Dark Up 33.4 244.9 Up 08:18:33 - 08:48:33 796
Susanville 08:33:28 -66.3 Dark Up 33.2 245.9 Up 08:18:28 - 08:48:28 780
Gimple 08:33:27 -66.6 Dark Up 33.4 245.9 Up 08:18:27 - 08:48:27 757
Greenville 08:33:28 -66.6 Dark Up 33.5 245.8 Up 08:18:28 - 08:48:28 755
Reno 08:33:22 -67.0 Dark Up 33.0 247.1 Up 08:18:22 - 08:48:22 751
Portola 08:33:25 -66.9 Dark Up 33.3 246.4 Up 08:18:25 - 08:48:25 749
Quincy 08:33:27 -66.8 Dark Up 33.6 245.9 Up 08:18:27 - 08:48:27 743
Yerington 08:33:18 -67.4 Dark Up 32.7 247.9 Up 08:18:18 - 08:48:18 735
Tonopah 08:33:09 -67.9 Dark Up 31.7 250.0 Up 08:18:09 - 08:48:09 732
Carson City 08:33:20 -67.4 Dark Up 33.1 247.3 Up 08:18:20 - 08:48:20 730
Hawthorne 08:33:14 -67.8 Dark Up 32.5 248.6 Up 08:18:14 - 08:48:14 722
Gardnerville 08:33:19 -67.6 Dark Up 33.1 247.5 Up 08:18:19 - 08:48:19 716
Indian Springs 08:32:58 -68.8 Dark Up 31.0 252.0 Up 08:17:58 - 08:47:58 681
Lee Vining 08:33:13 -68.4 Dark Up 33.1 248.6 Up 08:18:13 - 08:48:13 673
Beatty 08:33:02 -68.8 Dark Up 31.7 251.0 Up 08:18:02 - 08:48:02 672
Henderson 08:32:54 -69.0 Dark Up 30.7 252.8 Up 08:17:54 - 08:47:54 666
Bishop 08:33:08 -68.8 Dark Up 32.8 249.5 Up 08:18:08 - 08:48:08 656
Patrick 08:32:48 -69.2 Dark Up 30.0 253.9 Low 08:17:48 - 08:47:48 656
Kingman/Dolan Springs 08:32:47 -69.4 Dark Up 30.2 253.9 Up 08:17:47 - 08:47:47 637
Searchlight/Boulder City 08:32:51 -69.5 Dark Up 30.8 253.2 Up 08:17:51 - 08:47:51 631
Laughlin/Bullhead City 08:32:48 -69.7 Dark Up 30.6 253.6 Up 08:17:48 - 08:47:48 621
Lone Pine 08:33:04 -69.5 Dark Up 32.8 250.2 Up 08:18:04 - 08:48:04 617
Mohave Valley 08:32:47 -69.9 Dark Up 30.7 253.7 Up 08:17:47 - 08:47:47 604
Lake Havasu City 08:32:45 -70.1 Dark Up 30.6 254.1 Up 08:17:45 - 08:47:45 584
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 - 08:47:47 467
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 - 08:47:37 455
Wildwood 08:32:54 -72.0 Dark Up 34.1 251.3 Up 08:17:54 - 08:47:54 437

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 2019/07/02 21:58:48 UT

Marc W. Buie, Southwest Research Institute

RECON