RECON: TNO occultation with 15XW379

Event between 15XW379 and star GA1040:03231347 with event index number of 1548222

Geocentric closest approach at 2020/01/31 06:34:34 UTC

J2000 position of star is 08:54:54.6 +14:35:48
Equinox of date position of star is 08:55:59.1 +14:31:19
Stellar brightness G=14.9, use SENSEUP=128
Star is 111 degrees from the moon. Moon is 33% illuminated.
TNO apparent brightness V=20.0

[RECON map]
TNO is 20.3 AU from the Sun and 19.3 AU from the Earth.
The TNO is moving 23.3 km/sec on the sky relative to the star, or, 6.0 arcsec/hr.
The 1-sigma error in the time of the event is 50 seconds.
The 1-sigma cross-track error in the shadow position is 769 km.
The sky-plane scale is 14032.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.0
Diameter=229.1 km assuming a 5% albedo -- 10.4 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 15XW379, (2020/01/31 06:35UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:26.4 +11:52:06  1.3 18.06 129
62Omi1Cnc      08:58:22.0 +15:14:41  5.3  0.92 111
PPM 125872     08:55:01.5 +14:45:05  8.5  0.33 110
PPM 125898     08:55:58.0 +14:25:06  9.3  0.10 111
15XW379        08:56:01.4 +14:31:09 14.9       111
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 22.4 km RECON observability=1.0 and success probability=3.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:36:37 -52.5 Dark Up 49.7 142.6 Up 06:31:58 - 06:41:16 3696
Summerland 06:36:38 -52.6 Dark Up 49.8 142.0 Up 06:31:59 - 06:41:17 3664
Penticton 06:36:37 -52.7 Dark Up 49.9 142.1 Up 06:31:58 - 06:41:16 3659
Okanagan Falls 06:36:37 -52.8 Dark Up 50.0 141.9 Up 06:31:58 - 06:41:16 3640
Oliver 06:36:38 -53.0 Dark Up 50.2 141.8 Up 06:31:59 - 06:41:17 3625
Anarchist Mountain Observatory 06:36:37 -53.2 Dark Up 50.4 141.9 Up 06:31:58 - 06:41:16 3611
Oroville 06:36:37 -53.2 Dark Up 50.4 141.8 Up 06:31:58 - 06:41:16 3603
Tonasket 06:36:37 -53.4 Dark Up 50.6 141.6 Up 06:31:58 - 06:41:16 3581
Okanogan 06:36:37 -53.6 Dark Up 50.8 141.1 Up 06:31:58 - 06:41:16 3546
Brewster 06:36:38 -53.7 Dark Up 50.9 140.7 Up 06:31:59 - 06:41:17 3517
Manson/Chelan 06:36:39 -53.7 Dark Up 50.9 140.0 Up 06:32:00 - 06:41:18 3491
Entiat 06:36:40 -53.8 Dark Up 51.1 139.7 Up 06:32:01 - 06:41:19 3468
Wenatchee 06:36:41 -54.0 Dark Up 51.2 139.4 Up 06:32:02 - 06:41:20 3442
Ellensburg 06:36:41 -54.2 Dark Up 51.4 138.7 Up 06:32:02 - 06:41:20 3398
Yakima 06:36:40 -54.5 Dark Up 51.7 138.4 Up 06:32:01 - 06:41:19 3358
Pasco 06:36:36 -55.4 Dark Up 52.6 140.1 Up 06:31:57 - 06:41:15 3347
Toppenish/White Swan 06:36:40 -54.7 Dark Up 52.0 138.4 Up 06:32:01 - 06:41:19 3339
PNWRO 06:36:36 -55.7 Dark Up 52.9 140.2 Up 06:31:57 - 06:41:15 3326
George/Umatilla 06:36:37 -55.5 Dark Up 52.8 139.5 Up 06:31:58 - 06:41:16 3310
Goldendale 06:36:42 -54.9 Dark Up 52.2 137.4 Up 06:32:03 - 06:41:21 3278
The Dalles 06:36:43 -54.9 Dark Up 52.2 136.7 Up 06:32:04 - 06:41:22 3250
Maupin 06:36:42 -55.2 Dark Up 52.5 136.4 Up 06:32:03 - 06:41:21 3210
Madras/Culver 06:36:43 -55.6 Dark Up 52.9 135.9 Up 06:32:04 - 06:41:22 3155
Redmond 06:36:42 -55.8 Dark Up 53.1 135.5 Up 06:32:03 - 06:41:21 3118
Sisters 06:36:44 -55.6 Dark Up 52.9 135.0 Up 06:32:05 - 06:41:23 3114
Bend 06:36:43 -55.9 Dark Up 53.2 135.1 Up 06:32:04 - 06:41:22 3094
Oregon Observatory 06:36:43 -55.9 Dark Up 53.3 134.8 Up 06:32:04 - 06:41:22 3075
La Pine/Gilchrist 06:36:43 -56.1 Dark Up 53.4 134.5 Up 06:32:04 - 06:41:22 3053
Niwot 06:35:49 -65.9 Dark Down 63.0 158.3 Up 06:31:10 - 06:40:28 3020
North Lake 06:36:42 -56.7 Dark Up 54.0 134.9 Up 06:32:03 - 06:41:21 3019
SwRI 06:35:49 -66.0 Dark Down 63.1 158.0 Up 06:31:10 - 06:40:28 3008
Paisley 06:36:41 -57.2 Dark Up 54.6 134.8 Up 06:32:02 - 06:41:20 2969
Chiloquin 06:36:45 -56.6 Dark Up 54.0 132.9 Up 06:32:06 - 06:41:24 2935
Lakeview 06:36:40 -57.7 Dark Up 55.0 134.6 Up 06:32:01 - 06:41:19 2920
Klamath Falls 06:36:44 -56.9 Dark Up 54.2 132.7 Up 06:32:05 - 06:41:23 2901
Tulelake 06:36:44 -57.2 Dark Up 54.6 132.8 Up 06:32:05 - 06:41:23 2879
Cedarville 06:36:39 -58.2 Dark Up 55.6 134.2 Up 06:32:00 - 06:41:18 2856
Fall River/Burney 06:36:43 -57.8 Dark Up 55.2 132.0 Up 06:32:04 - 06:41:22 2787
Susanville 06:36:41 -58.7 Dark Up 56.1 132.3 Up 06:32:02 - 06:41:20 2734
Gimple 06:36:41 -58.7 Dark Up 56.1 131.7 Up 06:32:02 - 06:41:20 2702
Greenville 06:36:42 -58.7 Dark Up 56.1 131.6 Up 06:32:03 - 06:41:21 2701
Quincy 06:36:41 -58.8 Dark Up 56.2 131.4 Up 06:32:02 - 06:41:20 2680
Portola 06:36:40 -59.2 Dark Up 56.6 131.9 Up 06:32:01 - 06:41:19 2675
Reno 06:36:38 -59.7 Dark Up 57.1 132.5 Up 06:31:59 - 06:41:17 2659
Carson City 06:36:38 -59.9 Dark Up 57.4 132.1 Up 06:31:59 - 06:41:17 2622
Yerington 06:36:36 -60.4 Dark Up 57.9 132.8 Up 06:31:57 - 06:41:15 2613
Gardnerville 06:36:38 -60.1 Dark Up 57.6 131.9 Up 06:31:59 - 06:41:17 2597
Hawthorne 06:36:34 -61.1 Dark Up 58.5 133.0 Up 06:31:55 - 06:41:13 2574
Tonopah 06:36:29 -62.2 Dark Up 59.6 134.6 Up 06:31:50 - 06:41:08 2552
Lee Vining 06:36:35 -61.1 Dark Up 58.6 131.6 Up 06:31:56 - 06:41:14 2507
Bishop 06:36:33 -61.9 Dark Up 59.4 132.0 Up 06:31:54 - 06:41:12 2458
Beatty 06:36:27 -63.2 Dark Up 60.7 133.9 Up 06:31:48 - 06:41:06 2441
Indian Springs 06:36:23 -64.1 Dark Up 61.5 135.2 Up 06:31:44 - 06:41:02 2429
Henderson 06:36:20 -64.8 Dark Down 62.3 135.6 Up 06:31:41 - 06:40:59 2388
Lone Pine 06:36:31 -62.6 Dark Up 60.1 131.5 Up 06:31:52 - 06:41:10 2385
Patrick 06:36:16 -65.9 Dark Down 63.3 136.6 Up 06:31:37 - 06:40:55 2346
DCO 06:36:13 -66.6 Dark Down 64.0 137.5 Up 06:31:34 - 06:40:52 2329
Searchlight/Boulder City 06:36:20 -65.3 Dark Down 62.7 134.9 Up 06:31:41 - 06:40:59 2329
Kingman/Dolan Springs 06:36:16 -66.0 Dark Down 63.4 136.0 Up 06:31:37 - 06:40:55 2319
Laughlin/Bullhead City 06:36:18 -65.7 Dark Down 63.1 135.1 Up 06:31:39 - 06:40:57 2305
Mohave Valley 06:36:18 -65.9 Dark Down 63.3 134.7 Up 06:31:39 - 06:40:57 2277
Lake Havasu City 06:36:17 -66.3 Dark Down 63.7 134.6 Up 06:31:38 - 06:40:56 2241
Parker 06:36:16 -66.5 Dark Down 64.0 134.1 Up 06:31:37 - 06:40:55 2204
CPSLO 06:36:40 -61.7 Dark Up 59.3 126.0 Up 06:32:01 - 06:41:19 2201
Blythe 06:36:17 -66.7 Dark Down 64.2 132.8 Up 06:31:38 - 06:40:56 2143
Wildwood 06:36:32 -63.7 Dark Up 61.4 127.2 Up 06:31:53 - 06:41:11 2111
Idyllwild 06:36:25 -65.2 Dark Up 62.8 129.5 Up 06:31:46 - 06:41:04 2111
Calipatria 06:36:20 -66.4 Dark Up 63.9 130.5 Up 06:31:41 - 06:40:59 2071
Yuma 06:36:17 -67.2 Dark Down 64.8 131.3 Up 06:31:38 - 06:40:56 2045

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 15XW379, (2020/01/31 06:35UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:22.0 +11:58:02  1.3 18.06 129
62Omi1Cnc      08:57:15.0 +15:19:23  5.3  0.92 111
PPM 125872     08:53:54.7 +14:49:43  8.5  0.33 110
PPM 125898     08:54:51.3 +14:29:45  9.3  0.10 111
15XW379        08:54:54.6 +14:35:48 14.9       111
Positions are for J2000

Event circumstances last updated at 2019/05/23 22:44:40 UT

Marc W. Buie, Southwest Research Institute

RECON