RECON: TNO occultation with 524179

Event between (524179) 01FQ185 and star GA0760:05059717 with event index number of 1591586

Geocentric closest approach at 2020/03/20 08:16:06 UTC

J2000 position of star is 14:48:02.2 -12:43:32
Equinox of date position of star is 14:49:06.1 -12:48:21
Stellar brightness G=10.3, use SENSEUP=4
Star is 93 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 37.1 AU from the Sun and 36.4 AU from the Earth.
The TNO is moving 16.0 km/sec on the sky relative to the star, or, 2.2 arcsec/hr.
The 1-sigma error in the time of the event is 165 seconds.
The 1-sigma cross-track error in the shadow position is 2004 km.
The sky-plane scale is 26389.9 km/arcsec.

The TNO has an absolute magnitude Hv=6.9
Diameter=251.2 km assuming a 5% albedo -- 15.7 sec chord
Diameter=102.6 km assuming a 30% albedo -- 6.4 sec chord
Dynamical classification is 2:1E
 
 
 
 
 
 

Star training set for 524179, (2020/03/20 08:16UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:15.7 -11:15:58  1.0 20.32 112
27Bet Lib      15:18:05.9 -09:27:23  2.6  7.85  87
7Mu Lib        14:50:25.7 -14:13:55  5.8  1.46  92
PPM 229299     14:49:01.3 -12:55:26  6.6  0.12  93
PPM 229292     14:48:44.6 -12:49:40  9.4  0.10  93
524179         14:49:08.5 -12:48:32 10.3        92
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 14.1 km RECON observability=0.9 and success probability=14.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:20:39 -39.9 Dark Down 19.1 140.6 Really Low 08:06:24 - 08:34:55 -490
Summerland 08:20:41 -40.2 Dark Down 19.2 140.3 Really Low 08:06:25 - 08:34:56 -520
Penticton 08:20:40 -40.3 Dark Down 19.3 140.4 Really Low 08:06:25 - 08:34:56 -521
Okanagan Falls 08:20:40 -40.5 Dark Down 19.5 140.3 Really Low 08:06:25 - 08:34:56 -535
Oliver 08:20:41 -40.6 Dark Down 19.6 140.3 Really Low 08:06:25 - 08:34:56 -546
Anarchist Mountain Observatory 08:20:41 -40.8 Dark Down 19.8 140.5 Really Low 08:06:25 - 08:34:56 -553
Oroville 08:20:41 -40.9 Dark Down 19.8 140.4 Really Low 08:06:25 - 08:34:56 -560
Tonasket 08:20:42 -41.1 Dark Down 20.0 140.3 Low 08:06:26 - 08:34:57 -577
Okanogan 08:20:43 -41.5 Dark Down 20.2 140.1 Low 08:06:27 - 08:34:58 -606
Brewster 08:20:44 -41.7 Dark Down 20.3 139.9 Low 08:06:28 - 08:34:59 -632
Manson/Chelan 08:20:45 -42.0 Dark Down 20.3 139.5 Low 08:06:29 - 08:35:00 -658
Wenatchee 08:20:47 -42.4 Dark Down 20.6 139.2 Low 08:06:31 - 08:35:02 -698
Ellensburg 08:20:48 -42.9 Dark Down 20.8 138.9 Low 08:06:32 - 08:35:03 -736
SwRI 08:19:57 -46.7 Dark Down 32.8 151.9 Up 08:05:42 - 08:34:13 -746
Pasco 08:20:44 -43.5 Dark Down 22.0 140.0 Low 08:06:29 - 08:35:00 -746
PNWRO 08:20:44 -43.8 Dark Down 22.3 140.2 Low 08:06:28 - 08:34:59 -758
Yakima 08:20:48 -43.3 Dark Down 21.1 138.8 Low 08:06:33 - 08:35:04 -767
Toppenish/White Swan 08:20:48 -43.5 Dark Down 21.4 138.9 Low 08:06:32 - 08:35:03 -777
George/Umatilla 08:20:46 -43.9 Dark Down 22.2 139.7 Low 08:06:30 - 08:35:01 -778
Goldendale 08:20:51 -44.1 Dark Down 21.6 138.4 Low 08:06:35 - 08:35:06 -833
The Dalles 08:20:52 -44.3 Dark Down 21.6 138.0 Low 08:06:37 - 08:35:08 -862
Maupin 08:20:52 -44.7 Dark Down 22.0 138.0 Low 08:06:37 - 08:35:08 -890
Madras/Culver 08:20:54 -45.3 Dark Down 22.4 137.8 Low 08:06:38 - 08:35:09 -934
Redmond 08:20:54 -45.6 Dark Down 22.6 137.6 Low 08:06:38 - 08:35:09 -963
Sisters 08:20:55 -45.6 Dark Down 22.4 137.3 Low 08:06:39 - 08:35:10 -974
Bend 08:20:55 -45.8 Dark Down 22.7 137.4 Low 08:06:39 - 08:35:10 -985
Oregon Observatory 08:20:55 -46.0 Dark Down 22.7 137.3 Low 08:06:39 - 08:35:10 -1003
La Pine/Gilchrist 08:20:56 -46.2 Dark Down 22.9 137.2 Low 08:06:40 - 08:35:11 -1021
North Lake 08:20:55 -46.6 Dark Down 23.5 137.6 Low 08:06:39 - 08:35:10 -1035
Paisley 08:20:54 -47.2 Dark Down 24.1 137.8 Low 08:06:38 - 08:35:09 -1067
Lakeview 08:20:54 -47.7 Dark Down 24.5 137.8 Low 08:06:38 - 08:35:09 -1100
Chiloquin 08:20:59 -47.3 Dark Down 23.5 136.5 Low 08:06:44 - 08:35:15 -1121
Klamath Falls 08:20:59 -47.7 Dark Down 23.8 136.5 Low 08:06:43 - 08:35:14 -1146
Cedarville 08:20:54 -48.3 Dark Down 25.1 137.7 Low 08:06:38 - 08:35:09 -1147
Tulelake 08:20:58 -47.9 Dark Down 24.1 136.7 Low 08:06:43 - 08:35:14 -1157
Fall River/Burney 08:20:58 -48.8 Dark Down 24.9 136.5 Low 08:06:43 - 08:35:14 -1228
Susanville 08:20:57 -49.4 Dark Down 25.7 137.0 Low 08:06:41 - 08:35:12 -1254
Gimple 08:20:58 -49.7 Dark Down 25.8 136.7 Low 08:06:42 - 08:35:13 -1284
Greenville 08:20:58 -49.7 Dark Down 25.7 136.6 Low 08:06:43 - 08:35:14 -1287
Reno 08:20:55 -50.2 Dark Down 26.8 137.4 Low 08:06:39 - 08:35:10 -1296
Portola 08:20:58 -50.0 Dark Down 26.2 136.9 Low 08:06:43 - 08:35:14 -1297
Quincy 08:20:59 -49.9 Dark Down 25.9 136.5 Low 08:06:43 - 08:35:14 -1303
Yerington 08:20:53 -50.7 Dark Down 27.5 137.8 Low 08:06:38 - 08:35:09 -1319
Carson City 08:20:55 -50.6 Dark Down 27.0 137.3 Low 08:06:40 - 08:35:11 -1325
Tonopah 08:20:46 -51.5 Dark Down 29.2 139.3 Low 08:06:31 - 08:35:02 -1326
Hawthorne 08:20:51 -51.2 Dark Down 28.1 138.2 Low 08:06:36 - 08:35:07 -1338
Gardnerville 08:20:55 -50.8 Dark Down 27.2 137.3 Low 08:06:40 - 08:35:11 -1344
Indian Springs 08:20:42 -52.7 Dark Down 31.1 140.2 Up 08:06:26 - 08:34:57 -1393
Lee Vining 08:20:54 -51.8 Dark Down 28.3 137.5 Low 08:06:39 - 08:35:10 -1403
Beatty 08:20:45 -52.5 Dark Down 30.3 139.3 Up 08:06:30 - 08:35:01 -1405
Henderson 08:20:39 -53.1 Dark Down 31.9 140.7 Up 08:06:23 - 08:34:54 -1412
Patrick 08:20:34 -53.4 Dark Down 32.9 141.5 Up 08:06:19 - 08:34:50 -1422
Bishop 08:20:52 -52.3 Dark Down 29.1 138.0 Low 08:06:36 - 08:35:07 -1426
Kingman/Dolan Springs 08:20:35 -53.7 Dark Down 33.0 141.2 Up 08:06:20 - 08:34:51 -1448
Searchlight/Boulder City 08:20:39 -53.6 Dark Down 32.4 140.5 Up 08:06:23 - 08:34:54 -1457
Laughlin/Bullhead City 08:20:37 -53.8 Dark Down 32.8 140.7 Up 08:06:22 - 08:34:53 -1469
Lone Pine 08:20:51 -53.0 Dark Down 29.9 138.0 Low 08:06:35 - 08:35:06 -1478
Mohave Valley 08:20:38 -54.1 Dark Down 33.0 140.6 Up 08:06:22 - 08:34:53 -1492
Lake Havasu City 08:20:36 -54.4 Dark Down 33.4 140.7 Up 08:06:21 - 08:34:52 -1517
Parker 08:20:36 -54.8 Dark Down 33.7 140.5 Up 08:06:21 - 08:34:52 -1545
Blythe 08:20:38 -55.3 Dark Down 33.9 140.0 Up 08:06:23 - 08:34:54 -1602
Idyllwild 08:20:47 -55.6 Dark Down 32.7 138.1 Up 08:06:31 - 08:35:02 -1673
Calipatria 08:20:42 -56.0 Dark Down 33.8 138.9 Up 08:06:27 - 08:34:58 -1680
Yuma 08:20:38 -56.2 Dark Down 34.6 139.6 Up 08:06:22 - 08:34:53 -1683
CPSLO 08:21:01 -54.5 Dark Down 29.4 135.1 Low 08:06:46 - 08:35:17 -1685
Wildwood 08:20:54 -55.5 Dark Down 31.4 136.5 Up 08:06:39 - 08:35:10 -1713

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 524179, (2020/03/20 08:16UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0 20.32 112
27Bet Lib      15:17:00.3 -09:22:59  2.6  7.85  87
7Mu Lib        14:49:19.0 -14:08:56  5.8  1.46  92
PPM 229299     14:47:55.0 -12:50:26  6.6  0.12  93
PPM 229292     14:47:38.3 -12:44:39  9.4  0.10  93
524179         14:48:02.2 -12:43:32 10.3        93
Positions are for J2000

Event circumstances last updated at 2019/07/02 02:33:19 UT

Marc W. Buie, Southwest Research Institute

RECON