RECON: TNO occultation with 13UW18

Event between 13UW18 and star GA0960:00148476 with event index number of 2466615

Geocentric closest approach at 2021/10/31 06:07:34 UTC

J2000 position of star is 01:43:44.9 +07:09:54
Equinox of date position of star is 01:44:53.5 +07:16:26
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 130 degrees from the moon. Moon is 26% illuminated.
TNO apparent brightness V=24.0

[RECON map]
TNO is 35.8 AU from the Sun and 34.8 AU from the Earth.
The TNO is moving 24.3 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 173 seconds.
The 1-sigma cross-track error in the shadow position is 1936 km.
The sky-plane scale is 25237.2 km/arcsec.

The TNO has an absolute magnitude Hv=8.5
Diameter=116.4 km assuming a 5% albedo -- 5.0 sec chord
Diameter=47.5 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 13UW18, (2021/10/31 06:08UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:10.6 +16:33:05  0.8 43.06  87
68Omi Cet      02:20:27.1 -02:52:47  2.0 13.48 125
106Nu Psc      01:42:34.2 +05:35:50  4.4  1.77 131
PPM 145001     01:49:49.6 +07:47:30  8.4  1.33 129
PPM 144936     01:45:31.2 +07:11:13  9.5  0.18 130
13UW18         01:44:53.7 +07:16:27 15.9       130
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 20.1 km RECON observability=1.0 and success probability=16.9%
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 06:07:07 -49.2 Dark Down 45.4 160.4 Up 05:52:11 - 06:22:04 -1299
Victoria 06:07:22 -48.9 Dark Down 46.0 154.2 Up 05:52:25 - 06:22:18 -1305
Peachland 06:07:09 -49.5 Dark Down 45.8 159.7 Up 05:52:13 - 06:22:06 -1321
Kelowna 06:07:09 -49.5 Dark Down 45.8 160.1 Up 05:52:12 - 06:22:05 -1322
Summerland 06:07:10 -49.6 Dark Down 46.0 159.7 Up 05:52:13 - 06:22:06 -1334
Penticton 06:07:10 -49.7 Dark Down 46.0 159.9 Up 05:52:13 - 06:22:06 -1342
Oliver 06:07:10 -50.0 Dark Down 46.4 159.7 Up 05:52:14 - 06:22:07 -1366
Anarchist Mountain Observatory 06:07:10 -50.2 Dark Down 46.6 160.0 Up 05:52:13 - 06:22:06 -1383
Tonasket 06:07:11 -50.4 Dark Down 46.9 159.7 Up 05:52:14 - 06:22:07 -1403
Okanogan 06:07:12 -50.6 Dark Down 47.1 159.4 Up 05:52:15 - 06:22:08 -1423
Brewster 06:07:13 -50.8 Dark Down 47.3 159.0 Up 05:52:17 - 06:22:10 -1436
Manson/Chelan 06:07:14 -50.8 Dark Down 47.4 158.4 Up 05:52:17 - 06:22:10 -1441
Wenatchee 06:07:16 -51.1 Dark Down 47.8 158.0 Up 05:52:19 - 06:22:12 -1470
Ellensburg 06:07:17 -51.3 Dark Down 48.2 157.5 Up 05:52:21 - 06:22:14 -1493
Yakima 06:07:18 -51.6 Dark Down 48.5 157.3 Up 05:52:22 - 06:22:15 -1522
Toppenish/White Swan 06:07:18 -51.8 Dark Down 48.8 157.5 Up 05:52:22 - 06:22:15 -1542
Goldendale 06:07:21 -52.1 Dark Down 49.2 156.6 Up 05:52:24 - 06:22:17 -1570
The Dalles 06:07:22 -52.1 Dark Down 49.3 156.0 Up 05:52:25 - 06:22:18 -1576
Pasco 06:07:15 -52.5 Dark Down 49.2 159.3 Up 05:52:18 - 06:22:11 -1588
Maupin 06:07:23 -52.4 Dark Down 49.7 156.0 Up 05:52:26 - 06:22:19 -1610
PNWRO 06:07:15 -52.8 Dark Down 49.5 159.5 Up 05:52:18 - 06:22:11 -1613
Sisters 06:07:26 -52.8 Dark Down 50.4 154.8 Up 05:52:29 - 06:22:22 -1660
Redmond 06:07:24 -53.0 Dark Down 50.5 155.4 Up 05:52:28 - 06:22:21 -1674
Bend 06:07:25 -53.1 Dark Down 50.7 155.1 Up 05:52:29 - 06:22:22 -1686
Oregon Observatory 06:07:26 -53.2 Dark Down 50.8 154.8 Up 05:52:30 - 06:22:23 -1694
La Pine/Gilchrist 06:07:27 -53.3 Dark Down 50.9 154.6 Up 05:52:30 - 06:22:23 -1708
North Lake 06:07:26 -53.9 Dark Down 51.5 155.3 Up 05:52:29 - 06:22:22 -1759
Chiloquin 06:07:30 -53.9 Dark Down 51.8 153.5 Up 05:52:34 - 06:22:27 -1782
Klamath Falls 06:07:31 -54.2 Dark Down 52.2 153.4 Up 05:52:34 - 06:22:27 -1811
Paisley 06:07:26 -54.5 Dark Down 52.1 155.5 Up 05:52:30 - 06:22:23 -1813
Lakeview 06:07:26 -55.0 Dark Down 52.7 155.6 Up 05:52:30 - 06:22:23 -1858
Fall River/Burney 06:07:32 -55.2 Dark Down 53.4 153.3 Up 05:52:36 - 06:22:29 -1915
Cedarville 06:07:28 -55.5 Dark Down 53.3 155.5 Up 05:52:31 - 06:22:24 -1915
Susanville 06:07:31 -56.1 Dark Down 54.2 154.1 Up 05:52:34 - 06:22:27 -1988
Greenville 06:07:32 -56.1 Dark Down 54.3 153.5 Up 05:52:36 - 06:22:29 -2001
Gimple 06:07:32 -56.1 Dark Down 54.3 153.6 Up 05:52:36 - 06:22:29 -2004
Quincy 06:07:33 -56.2 Dark Down 54.5 153.3 Up 05:52:37 - 06:22:30 -2017
Portola 06:07:32 -56.6 Dark Down 54.8 154.0 Up 05:52:35 - 06:22:28 -2042
Reno 06:07:30 -57.1 Dark Down 55.2 154.9 Up 05:52:34 - 06:22:27 -2085
Carson City 06:07:31 -57.4 Dark Down 55.6 154.7 Up 05:52:35 - 06:22:28 -2115
Gardnerville 06:07:31 -57.6 Dark Down 55.8 154.7 Up 05:52:35 - 06:22:28 -2136
Yerington 06:07:29 -57.9 Dark Down 55.9 155.7 Up 05:52:32 - 06:22:25 -2152
Hawthorne 06:07:29 -58.5 Dark Down 56.5 156.3 Up 05:52:32 - 06:22:25 -2207
Lee Vining 06:07:32 -58.6 Dark Down 56.9 155.1 Up 05:52:35 - 06:22:28 -2237
Tonopah 06:07:25 -59.6 Dark Down 57.4 158.4 Up 05:52:28 - 06:22:21 -2292
Bishop 06:07:30 -59.4 Dark Down 57.7 156.0 Up 05:52:33 - 06:22:26 -2312
Beatty 06:07:25 -60.7 Dark Down 58.6 158.6 Up 05:52:29 - 06:22:22 -2406
CPSLO 06:07:42 -59.4 Dark Down 58.7 150.6 Up 05:52:45 - 06:22:38 -2410
Indian Springs 06:07:23 -61.5 Dark Down 59.2 160.3 Up 05:52:26 - 06:22:19 -2470
Dunrhomin 06:06:42 -62.7 Dark Down 56.9 180.6 Up 05:51:46 - 06:21:39 -2489
Henderson 06:07:21 -62.3 Dark Down 59.9 161.3 Up 05:52:24 - 06:22:17 -2540
Wildwood 06:07:37 -61.5 Dark Down 60.6 153.3 Up 05:52:40 - 06:22:33 -2585
Laughlin/Bullhead City 06:07:21 -63.1 Dark Down 60.8 161.6 Up 05:52:25 - 06:22:18 -2630
Patrick 06:07:19 -63.4 Dark Down 60.8 163.2 Up 05:52:22 - 06:22:15 -2632
Kingman/Dolan Springs 06:07:19 -63.4 Dark Down 60.9 162.7 Up 05:52:23 - 06:22:16 -2645
Mohave Valley 06:07:22 -63.4 Dark Down 61.1 161.5 Up 05:52:26 - 06:22:19 -2654
Idyllwild 06:07:32 -62.9 Dark Down 61.6 156.6 Up 05:52:35 - 06:22:28 -2682
Lake Havasu City 06:07:22 -63.8 Dark Down 61.5 161.8 Up 05:52:26 - 06:22:19 -2698
Parker 06:07:23 -64.1 Dark Down 61.9 161.6 Up 05:52:26 - 06:22:19 -2730
Blythe 06:07:24 -64.3 Dark Down 62.3 160.7 Up 05:52:28 - 06:22:21 -2766
Calipatria 06:07:28 -64.0 Dark Down 62.5 158.5 Up 05:52:32 - 06:22:25 -2778
Yuma 06:07:26 -64.9 Dark Down 63.2 160.0 Up 05:52:29 - 06:22:22 -2848
George/Scottsdale 06:07:15 -65.7 Dark Down 62.8 166.4 Up 05:52:18 - 06:22:11 -2852

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 13UW18, (2021/10/31 06:08UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 43.06  87
68Omi Cet      02:19:20.8 -02:58:45  2.0 13.48 125
106Nu Psc      01:41:25.9 +05:29:15  4.4  1.77 131
PPM 145001     01:48:40.7 +07:41:01  8.4  1.33 129
PPM 144936     01:44:22.4 +07:04:41  9.5  0.18 130
13UW18         01:43:44.9 +07:09:54 15.9       130
Positions are for J2000

Event circumstances last updated at 2021/10/06 01:04:20 UT

Marc W. Buie, Southwest Research Institute

RECON