RECON: TNO occultation with 523615

Event between (523615) 06UO321 and star GA0940:00105385 with event index number of 316043

Geocentric closest approach at 2018/10/17 09:13:25 UTC

J2000 position of star is 01:10:57.7 +05:37:55
Equinox of date position of star is 01:11:56.3 +05:43:53
Stellar brightness G=15.0, use SENSEUP=128
Star is 78 degrees from the moon. Moon is 56% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 42.6 AU from the Sun and 41.7 AU from the Earth.
The TNO is moving 25.1 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 106 seconds.
The 1-sigma cross-track error in the shadow position is 1846 km.
The sky-plane scale is 30209.9 km/arcsec.

The TNO has an absolute magnitude Hv=7.5
Diameter=190.6 km assuming a 5% albedo -- 7.6 sec chord
Diameter=77.8 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 523615, (2018/10/17 09:13UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:14:12.4 +15:17:17  2.8 17.09  69
80 Psc         01:09:20.4 +05:44:55  5.5  0.65  77
PPM 144383     01:14:50.2 +05:14:27  7.8  0.87  78
PPM 144344     01:11:53.0 +05:57:36  9.9  0.23  78
PPM 144340     01:11:39.7 +05:33:51 11.0  0.18  78
523615         01:11:56.3 +05:43:53 15.0        78
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 20.0 km RECON observability=1.0 and success probability=2.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 09:11:12 -45.6 Dark Down 40.6 215.3 Up 09:01:51 - 09:20:33 -5008
Kelowna 09:11:11 -45.4 Dark Down 40.4 215.7 Up 09:01:50 - 09:20:32 -5012
Penticton 09:11:12 -45.8 Dark Down 40.8 215.7 Up 09:01:51 - 09:20:33 -5040
Okanagan Falls 09:11:12 -46.0 Dark Down 41.0 215.7 Up 09:01:51 - 09:20:33 -5056
Oliver 09:11:12 -46.1 Dark Down 41.1 215.8 Up 09:01:51 - 09:20:33 -5071
Anarchist Mountain Observatory 09:11:11 -46.2 Dark Down 41.2 216.2 Up 09:01:50 - 09:20:32 -5090
Oroville 09:11:11 -46.3 Dark Down 41.2 216.1 Up 09:01:50 - 09:20:32 -5095
Tonasket 09:11:11 -46.5 Dark Down 41.4 216.2 Up 09:01:50 - 09:20:32 -5116
Okanogan 09:11:12 -46.8 Dark Down 41.8 216.2 Up 09:01:51 - 09:20:33 -5142
Brewster 09:11:12 -47.1 Dark Down 42.1 216.1 Up 09:01:51 - 09:20:33 -5162
Manson/Chelan 09:11:13 -47.4 Dark Down 42.4 215.8 Up 09:01:52 - 09:20:34 -5172
Entiat 09:11:13 -47.6 Dark Down 42.6 215.8 Up 09:01:52 - 09:20:34 -5190
Wenatchee 09:11:13 -47.9 Dark Down 42.8 215.8 Up 09:01:52 - 09:20:34 -5211
Ellensburg 09:11:13 -48.3 Dark Down 43.2 215.8 Up 09:01:52 - 09:20:34 -5243
Yakima 09:11:13 -48.7 Dark Down 43.6 216.0 Up 09:01:52 - 09:20:34 -5279
Toppenish/White Swan 09:11:13 -48.8 Dark Down 43.7 216.3 Up 09:01:52 - 09:20:34 -5303
Pasco 09:11:10 -48.4 Dark Down 43.3 218.0 Up 09:01:49 - 09:20:31 -5342
Goldendale 09:11:14 -49.4 Dark Down 44.3 216.1 Up 09:01:53 - 09:20:35 -5343
The Dalles 09:11:15 -49.7 Dark Down 44.6 215.8 Up 09:01:54 - 09:20:36 -5355
George/Umatilla 09:11:10 -48.8 Dark Down 43.6 217.9 Up 09:01:49 - 09:20:31 -5368
PNWRO 09:11:10 -48.5 Dark Down 43.4 218.4 Up 09:01:49 - 09:20:31 -5370
Maupin 09:11:15 -50.0 Dark Down 44.9 216.2 Up 09:01:54 - 09:20:36 -5396
Madras/Culver 09:11:15 -50.5 Dark Down 45.4 216.4 Up 09:01:54 - 09:20:36 -5445
Sisters 09:11:17 -51.0 Dark Down 45.9 216.1 Up 09:01:56 - 09:20:38 -5465
Redmond 09:11:15 -50.8 Dark Down 45.7 216.6 Up 09:01:54 - 09:20:36 -5476
Bend 09:11:16 -51.1 Dark Down 45.9 216.5 Up 09:01:55 - 09:20:37 -5493
Oregon Observatory 09:11:16 -51.3 Dark Down 46.1 216.5 Up 09:01:55 - 09:20:37 -5506
La Pine/Gilchrist 09:11:16 -51.5 Dark Down 46.3 216.5 Up 09:01:55 - 09:20:37 -5523
North Lake 09:11:15 -51.6 Dark Down 46.4 217.6 Up 09:01:54 - 09:20:36 -5578
Chiloquin 09:11:17 -52.5 Dark Down 47.4 216.8 Up 09:01:56 - 09:20:38 -5618
Paisley 09:11:13 -51.9 Dark Down 46.7 218.4 Up 09:01:52 - 09:20:34 -5638
Klamath Falls 09:11:17 -52.8 Dark Down 47.6 217.1 Up 09:01:56 - 09:20:38 -5652
Tulelake 09:11:17 -52.9 Dark Down 47.7 217.7 Up 09:01:56 - 09:20:38 -5684
Lakeview 09:11:13 -52.2 Dark Down 47.0 219.0 Up 09:01:52 - 09:20:34 -5690
Cedarville 09:11:13 -52.7 Dark Down 47.4 219.7 Up 09:01:52 - 09:20:34 -5756
Fall River/Burney 09:11:16 -53.6 Dark Down 48.4 218.4 Up 09:01:55 - 09:20:37 -5772
Susanville 09:11:14 -53.8 Dark Down 48.5 219.8 Up 09:01:53 - 09:20:35 -5851
Greenville 09:11:15 -54.2 Dark Down 48.9 219.6 Up 09:01:54 - 09:20:36 -5870
Gimple 09:11:15 -54.1 Dark Down 48.8 219.8 Up 09:01:54 - 09:20:36 -5872
Quincy 09:11:15 -54.3 Dark Down 49.0 219.8 Up 09:01:54 - 09:20:36 -5889
Portola 09:11:14 -54.2 Dark Down 48.9 220.5 Up 09:01:53 - 09:20:35 -5913
Reno 09:11:12 -54.1 Dark Down 48.7 221.5 Up 09:01:51 - 09:20:33 -5955
Carson City 09:11:12 -54.4 Dark Down 49.0 221.9 Up 09:01:51 - 09:20:33 -5990
Gardnerville 09:11:12 -54.5 Dark Down 49.2 222.1 Up 09:01:51 - 09:20:33 -6015
Yerington 09:11:10 -54.2 Dark Down 48.8 222.8 Up 09:01:49 - 09:20:31 -6025
Hawthorne 09:11:09 -54.3 Dark Down 48.9 223.8 Up 09:01:48 - 09:20:30 -6083
Lee Vining 09:11:10 -55.0 Dark Down 49.5 223.7 Up 09:01:49 - 09:20:31 -6126
Tonopah 09:11:05 -53.9 Dark Down 48.4 226.0 Up 09:01:44 - 09:20:26 -6164
Bishop 09:11:08 -55.1 Dark Down 49.6 225.1 Up 09:01:47 - 09:20:29 -6203
Niwot 09:10:33 -45.5 Dark Down 39.9 237.5 Up 09:01:12 - 09:19:54 -6221
Lone Pine 09:11:07 -55.4 Dark Down 49.9 226.1 Up 09:01:46 - 09:20:28 -6287
Beatty 09:11:04 -54.5 Dark Down 49.0 227.5 Up 09:01:43 - 09:20:25 -6290
CPSLO 09:11:16 -57.8 Dark Down 52.3 224.0 Up 09:01:55 - 09:20:37 -6348
Indian Springs 09:11:01 -54.1 Dark Down 48.5 229.1 Up 09:01:40 - 09:20:22 -6349
Henderson 09:10:59 -54.1 Dark Down 48.5 230.3 Up 09:01:38 - 09:20:20 -6419
Searchlight/Boulder City 09:10:59 -54.4 Dark Down 48.8 230.9 Up 09:01:38 - 09:20:20 -6478
Patrick 09:10:55 -53.8 Dark Down 48.2 232.2 Up 09:01:34 - 09:20:16 -6509
Laughlin/Bullhead City 09:10:58 -54.4 Dark Down 48.8 231.6 Up 09:01:37 - 09:20:19 -6517
Wildwood 09:11:10 -57.5 Dark Down 52.0 227.7 Up 09:01:49 - 09:20:31 -6523
Kingman/Dolan Springs 09:10:56 -54.0 Dark Down 48.4 232.1 Up 09:01:35 - 09:20:17 -6527
Mohave Valley 09:10:58 -54.6 Dark Down 48.9 231.8 Up 09:01:37 - 09:20:19 -6545
DCO 09:10:53 -53.5 Dark Down 47.9 233.2 Up 09:01:32 - 09:20:14 -6557
Lake Havasu City 09:10:57 -54.7 Dark Down 49.0 232.5 Up 09:01:36 - 09:20:18 -6591
Idyllwild 09:11:04 -56.6 Dark Down 51.0 230.4 Up 09:01:43 - 09:20:25 -6609
Parker 09:10:57 -54.9 Dark Down 49.2 232.8 Up 09:01:36 - 09:20:18 -6628
Blythe 09:10:58 -55.4 Dark Down 49.7 233.0 Up 09:01:37 - 09:20:19 -6674
Calipatria 09:11:01 -56.3 Dark Down 50.6 232.4 Up 09:01:40 - 09:20:22 -6701
Yuma 09:10:58 -56.0 Dark Down 50.3 233.8 Up 09:01:37 - 09:20:19 -6767

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 523615, (2018/10/17 09:13UT)
Object            RA         Dec     mag  sep  mel
Algenib        00:13:14.2 +15:11:01  2.8 17.09  69
80 Psc         01:08:21.9 +05:38:55  5.5  0.65  77
PPM 144383     01:13:51.7 +05:08:30  7.8  0.87  78
PPM 144344     01:10:54.5 +05:51:37  9.9  0.23  78
PPM 144340     01:10:41.2 +05:27:53 11.0  0.18  78
523615         01:10:57.7 +05:37:55 15.0        78
Positions are for J2000

Event circumstances last updated at 2018/10/15 20:14:35 UT

Marc W. Buie, Southwest Research Institute

RECON