RECON: TNO occultation with 50000

Event between (50000) Quaoar and star GA0740:16244047 with event index number of 198076

Geocentric closest approach at 2019/06/11 08:13:22 UTC

J2000 position of star is 18:09:38.4 -15:17:59
Equinox of date position of star is 18:10:41.8 -15:17:42
Stellar brightness G=16.8, use SENSEUP=128
Star is 87 degrees from the moon. Moon is 62% illuminated.
TNO apparent brightness V=18.7

[RECON map]
TNO is 42.9 AU from the Sun and 41.9 AU from the Earth.
The TNO is moving 24.0 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 107 seconds.
The 1-sigma cross-track error in the shadow position is 1682 km.
The sky-plane scale is 30370.7 km/arcsec.

The TNO has an absolute magnitude Hv=2.4
Diameter=1995.3 km assuming a 5% albedo -- 83.0 sec chord
Diameter=814.6 km assuming a 30% albedo -- 33.9 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 50000, (2019/06/11 08:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.2 -26:28:25  0.9 25.86  66
35Eta Oph      17:11:29.7 -15:44:52  2.6 14.28  73
PPM 234113     18:10:49.6 -13:55:47  6.4  1.37  87
PPM 234112     18:10:49.9 -15:16:39  7.7  0.03  87
50000          18:10:45.3 -15:17:41 16.8        87
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 15.2 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 08:13:57 -17.3 AT Up 24.7 170.3 Low 08:04:34 - 08:23:20 -8220
Oroville 08:13:57 -17.9 AT Up 25.3 170.4 Low 08:04:34 - 08:23:20 -8248
Tonasket 08:13:57 -18.1 Dark Up 25.5 170.4 Low 08:04:34 - 08:23:20 -8260
Okanogan 08:13:58 -18.5 Dark Up 25.8 170.2 Low 08:04:35 - 08:23:21 -8277
Brewster 08:13:59 -18.8 Dark Up 26.1 170.0 Low 08:04:36 - 08:23:22 -8292
Manson/Chelan 08:14:00 -19.0 Dark Up 26.2 169.6 Low 08:04:37 - 08:23:23 -8304
Entiat 08:14:01 -19.2 Dark Up 26.4 169.5 Low 08:04:38 - 08:23:24 -8316
Wenatchee 08:14:01 -19.5 Dark Up 26.7 169.4 Low 08:04:38 - 08:23:24 -8329
Ellensburg 08:14:02 -19.9 Dark Up 27.1 169.1 Low 08:04:39 - 08:23:25 -8352
Yakima 08:14:02 -20.3 Dark Up 27.4 169.0 Low 08:04:39 - 08:23:25 -8373
Toppenish/White Swan 08:14:02 -20.5 Dark Up 27.7 169.2 Low 08:04:39 - 08:23:25 -8384
Pasco 08:13:58 -20.6 Dark Up 28.0 170.5 Low 08:04:35 - 08:23:21 -8384
PNWRO 08:13:57 -20.8 Dark Up 28.2 170.8 Low 08:04:34 - 08:23:20 -8396
George/Umatilla 08:13:58 -20.9 Dark Up 28.3 170.3 Low 08:04:35 - 08:23:21 -8403
Goldendale 08:14:04 -21.1 Dark Up 28.2 168.7 Low 08:04:41 - 08:23:27 -8416
The Dalles 08:14:05 -21.3 Dark Up 28.3 168.3 Low 08:04:42 - 08:23:28 -8430
Maupin 08:14:05 -21.7 Dark Up 28.8 168.3 Low 08:04:42 - 08:23:28 -8453
Madras/Culver 08:14:05 -22.3 Dark Up 29.3 168.2 Low 08:04:42 - 08:23:28 -8484
Redmond 08:14:05 -22.6 Dark Up 29.6 168.1 Low 08:04:42 - 08:23:28 -8504
Sisters 08:14:07 -22.6 Dark Up 29.6 167.7 Low 08:04:44 - 08:23:30 -8505
Bend 08:14:06 -22.8 Dark Up 29.8 168.0 Low 08:04:43 - 08:23:29 -8517
Oregon Observatory 08:14:07 -23.0 Dark Up 30.0 167.8 Low 08:04:44 - 08:23:30 -8528
La Pine/Gilchrist 08:14:07 -23.2 Dark Up 30.2 167.7 Up 08:04:44 - 08:23:30 -8540
North Lake 08:14:05 -23.6 Dark Up 30.7 168.3 Up 08:04:42 - 08:23:28 -8562
Paisley 08:14:04 -24.2 Dark Up 31.3 168.6 Up 08:04:41 - 08:23:27 -8593
Chiloquin 08:14:08 -24.3 Dark Up 31.2 167.2 Up 08:04:45 - 08:23:31 -8608
Lakeview 08:14:04 -24.7 Dark Up 31.8 168.8 Up 08:04:41 - 08:23:27 -8622
Klamath Falls 08:14:08 -24.7 Dark Up 31.5 167.2 Up 08:04:45 - 08:23:31 -8628
Tulelake 08:14:08 -24.9 Dark Up 31.9 167.5 Up 08:04:45 - 08:23:31 -8642
Cedarville 08:14:04 -25.3 Dark Up 32.5 168.9 Up 08:04:41 - 08:23:27 -8661
Fall River/Burney 08:14:08 -25.9 Dark Up 32.8 167.5 Up 08:04:45 - 08:23:31 -8698
Niwot 08:13:11 -24.6 Dark Up 34.4 186.0 Up 08:03:48 - 08:22:34 -8707
Susanville 08:14:06 -26.5 Dark Up 33.5 168.2 Up 08:04:43 - 08:23:29 -8733
Gimple 08:14:07 -26.7 Dark Up 33.7 168.0 Up 08:04:44 - 08:23:30 -8752
Greenville 08:14:07 -26.7 Dark Up 33.7 167.9 Up 08:04:44 - 08:23:30 -8752
Quincy 08:14:07 -26.9 Dark Up 33.9 167.8 Up 08:04:44 - 08:23:30 -8765
Portola 08:14:05 -27.0 Dark Up 34.1 168.4 Up 08:04:42 - 08:23:28 -8770
Reno 08:14:03 -27.3 Dark Up 34.5 169.1 Up 08:04:40 - 08:23:26 -8784
Carson City 08:14:03 -27.6 Dark Up 34.8 169.0 Up 08:04:40 - 08:23:26 -8807
Yerington 08:14:01 -27.8 Dark Up 35.1 169.8 Up 08:04:38 - 08:23:24 -8816
Gardnerville 08:14:03 -27.9 Dark Up 35.1 169.1 Up 08:04:40 - 08:23:26 -8822
Hawthorne 08:13:59 -28.2 Dark Up 35.6 170.3 Up 08:04:36 - 08:23:22 -8844
Tonopah 08:13:55 -28.6 Dark Up 36.3 171.9 Up 08:04:32 - 08:23:18 -8868
Lee Vining 08:14:01 -28.8 Dark Up 36.1 169.7 Up 08:04:38 - 08:23:24 -8884
Bishop 08:13:59 -29.4 Dark Up 36.8 170.4 Up 08:04:36 - 08:23:22 -8920
Beatty 08:13:53 -29.7 Dark Up 37.5 172.3 Up 08:04:30 - 08:23:16 -8944
Indian Springs 08:13:50 -29.9 Dark Up 37.9 173.6 Up 08:04:27 - 08:23:13 -8961
Lone Pine 08:13:58 -30.1 Dark Up 37.6 170.7 Up 08:04:35 - 08:23:21 -8970
Henderson 08:13:47 -30.3 Dark Up 38.5 174.4 Up 08:04:24 - 08:23:10 -8995
Patrick 08:13:43 -30.8 Dark Up 39.2 175.7 Up 08:04:20 - 08:23:06 -9035
Searchlight/Boulder City 08:13:47 -30.9 Dark Up 39.1 174.4 Up 08:04:24 - 08:23:10 -9035
Kingman/Dolan Springs 08:13:43 -31.1 Dark Up 39.4 175.4 Up 08:04:20 - 08:23:06 -9051
DCO 08:13:40 -31.0 Dark Up 39.5 176.5 Up 08:04:17 - 08:23:03 -9054
Laughlin/Bullhead City 08:13:46 -31.1 Dark Up 39.4 174.8 Up 08:04:23 - 08:23:09 -9055
Mohave Valley 08:13:46 -31.4 Dark Up 39.7 174.8 Up 08:04:23 - 08:23:09 -9074
CPSLO 08:14:08 -31.6 Dark Up 38.5 167.5 Up 08:04:45 - 08:23:31 -9076
Lake Havasu City 08:13:45 -31.8 Dark Up 40.1 175.1 Up 08:04:22 - 08:23:08 -9102
Parker 08:13:45 -32.1 Dark Up 40.4 175.1 Up 08:04:22 - 08:23:08 -9127
Wildwood 08:14:01 -32.6 Dark Up 40.0 169.8 Up 08:04:38 - 08:23:24 -9151
Blythe 08:13:46 -32.7 Dark Up 40.9 174.7 Up 08:04:23 - 08:23:09 -9166
Idyllwild 08:13:54 -32.8 Dark Up 40.6 172.0 Up 08:04:31 - 08:23:17 -9167
Calipatria 08:13:50 -33.3 Dark Up 41.3 173.5 Up 08:04:27 - 08:23:13 -9206
Yuma 08:13:46 -33.6 Dark Up 41.8 174.5 Up 08:04:23 - 08:23:09 -9235

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 50000, (2019/06/11 08:13UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 25.86  66
35Eta Oph      17:10:22.7 -15:43:29  2.6 14.28  73
PPM 234113     18:09:43.4 -13:56:04  6.4  1.37  87
PPM 234112     18:09:43.1 -15:16:57  7.7  0.03  87
50000          18:09:38.4 -15:17:59 16.8        87
Positions are for J2000

Event circumstances last updated at 2018/06/05 18:18:41 UT

Marc W. Buie, Southwest Research Institute

RECON