RECON: TNO occultation with 523789

Event between (523789) 15FN345 and star GA0940:04306362 with event index number of 347000

Geocentric closest approach at 2019/05/12 11:07:06 UTC

J2000 position of star is 16:21:02.3 +05:59:17
Equinox of date position of star is 16:21:58.7 +05:56:37
Stellar brightness G=16.9, use SENSEUP=128
Star is 93 degrees from the moon. Moon is 55% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 39.0 AU from the Sun and 38.2 AU from the Earth.
The TNO is moving 24.3 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 92 seconds.
The 1-sigma cross-track error in the shadow position is 1512 km.
The sky-plane scale is 27678.3 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=346.7 km assuming a 5% albedo -- 14.3 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523789, (2019/05/12 11:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.9 -26:28:24  0.9 32.48 103
Unukalhai      15:45:13.4 +06:21:57  2.6  9.15  84
21 Her         16:25:07.5 +06:54:17  5.8  1.24  94
PPM 162482     16:20:23.1 +05:29:33  8.0  0.60  93
PPM 162496     16:21:08.3 +05:40:19  9.7  0.34  93
523789         16:21:59.4 +05:56:35 16.9        93
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 12.3 km RECON observability=0.6 and success probability=2.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 11:06:40 -9.8 NT Down 38.6 222.3 Up 10:58:32 - 11:14:48 4838
Summerland 11:06:41 -10.0 NT Down 38.7 221.9 Up 10:58:33 - 11:14:49 4827
Penticton 11:06:39 -10.1 NT Down 38.9 222.3 Up 10:58:31 - 11:14:47 4812
Okanagan Falls 11:06:39 -10.3 NT Down 39.1 222.4 Up 10:58:31 - 11:14:47 4800
Oliver 11:06:39 -10.4 NT Down 39.2 222.5 Up 10:58:31 - 11:14:47 4790
Anarchist Mountain Observatory 11:06:38 -10.4 NT Down 39.2 222.8 Up 10:58:30 - 11:14:46 4785
Oroville 11:06:37 -10.5 NT Down 39.3 222.8 Up 10:58:29 - 11:14:45 4778
Tonasket 11:06:37 -10.7 NT Down 39.5 222.9 Up 10:58:29 - 11:14:45 4764
Okanogan 11:06:36 -11.0 NT Down 39.8 222.9 Up 10:58:28 - 11:14:44 4739
Brewster 11:06:36 -11.3 NT Down 40.1 222.8 Up 10:58:28 - 11:14:44 4717
Manson/Chelan 11:06:36 -11.6 NT Down 40.4 222.5 Up 10:58:28 - 11:14:44 4695
Entiat 11:06:37 -11.8 NT Down 40.6 222.6 Up 10:58:29 - 11:14:45 4680
Wenatchee 11:06:36 -12.0 NT Down 40.8 222.6 Up 10:58:28 - 11:14:44 4661
Ellensburg 11:06:35 -12.4 AT Down 41.2 222.6 Up 10:58:27 - 11:14:43 4629
Pasco 11:06:30 -12.2 AT Down 41.1 224.7 Up 10:58:22 - 11:14:38 4616
PNWRO 11:06:28 -12.3 AT Down 41.2 225.1 Up 10:58:20 - 11:14:36 4605
Yakima 11:06:35 -12.7 AT Down 41.5 222.8 Up 10:58:27 - 11:14:43 4602
Toppenish/White Swan 11:06:33 -12.8 AT Down 41.6 223.1 Up 10:58:25 - 11:14:41 4592
George/Umatilla 11:06:29 -12.6 AT Down 41.5 224.6 Up 10:58:21 - 11:14:37 4588
Niwot 11:05:39 -8.0 NT Down 36.6 242.9 Up 10:57:31 - 11:13:47 4558
SwRI 11:05:39 -8.1 NT Down 36.7 242.9 Up 10:57:31 - 11:13:47 4549
Goldendale 11:06:32 -13.4 AT Down 42.2 223.0 Up 10:58:24 - 11:14:40 4544
The Dalles 11:06:33 -13.7 AT Down 42.6 222.7 Up 10:58:25 - 11:14:41 4520
Maupin 11:06:31 -13.9 AT Down 42.8 223.0 Up 10:58:23 - 11:14:39 4494
Madras/Culver 11:06:30 -14.3 AT Down 43.2 223.3 Up 10:58:22 - 11:14:38 4456
Redmond 11:06:29 -14.6 AT Down 43.5 223.5 Up 10:58:21 - 11:14:37 4430
Sisters 11:06:31 -14.8 AT Down 43.7 223.0 Up 10:58:23 - 11:14:39 4421
Bend 11:06:30 -14.8 AT Down 43.8 223.5 Up 10:58:22 - 11:14:38 4411
Oregon Observatory 11:06:29 -15.0 AT Down 43.9 223.4 Up 10:58:21 - 11:14:37 4396
La Pine/Gilchrist 11:06:29 -15.2 AT Down 44.1 223.5 Up 10:58:21 - 11:14:37 4380
North Lake 11:06:26 -15.2 AT Down 44.1 224.5 Up 10:58:18 - 11:14:34 4366
Paisley 11:06:24 -15.4 AT Down 44.4 225.3 Up 10:58:16 - 11:14:32 4336
Lakeview 11:06:22 -15.7 AT Down 44.6 225.9 Up 10:58:14 - 11:14:30 4305
Chiloquin 11:06:28 -16.2 AT Down 45.1 223.8 Up 10:58:20 - 11:14:36 4292
Klamath Falls 11:06:25 -16.4 AT Down 45.3 224.2 Up 10:58:17 - 11:14:33 4269
Cedarville 11:06:19 -16.0 AT Down 45.0 226.5 Up 10:58:11 - 11:14:27 4263
Tulelake 11:06:24 -16.4 AT Down 45.4 224.7 Up 10:58:16 - 11:14:32 4258
Fall River/Burney 11:06:21 -17.0 AT Down 46.0 225.4 Up 10:58:13 - 11:14:29 4194
Susanville 11:06:18 -17.1 AT Down 46.0 226.8 Up 10:58:10 - 11:14:26 4168
Gimple 11:06:18 -17.4 AT Down 46.3 226.7 Up 10:58:10 - 11:14:26 4141
Greenville 11:06:18 -17.4 AT Down 46.4 226.6 Up 10:58:10 - 11:14:26 4139
Portola 11:06:16 -17.4 AT Down 46.3 227.5 Up 10:58:08 - 11:14:24 4128
Reno 11:06:13 -17.2 AT Down 46.1 228.4 Up 10:58:05 - 11:14:21 4127
Quincy 11:06:18 -17.6 AT Down 46.5 226.8 Up 10:58:10 - 11:14:26 4124
Yerington 11:06:10 -17.2 AT Down 46.1 229.6 Up 10:58:02 - 11:14:18 4103
Carson City 11:06:12 -17.4 AT Down 46.4 228.7 Up 10:58:04 - 11:14:20 4100
Tonopah 11:06:02 -16.7 AT Down 45.5 232.5 Up 10:57:54 - 11:14:10 4088
Hawthorne 11:06:07 -17.2 AT Down 46.1 230.6 Up 10:57:59 - 11:14:15 4083
Gardnerville 11:06:11 -17.6 AT Down 46.5 229.0 Up 10:58:03 - 11:14:19 4083
Lee Vining 11:06:07 -17.9 AT Down 46.8 230.5 Up 10:57:59 - 11:14:15 4026
Indian Springs 11:05:54 -16.7 AT Down 45.4 235.4 Up 10:57:46 - 11:14:02 4018
Beatty 11:05:58 -17.2 AT Down 46.0 233.9 Up 10:57:50 - 11:14:06 4013
Bishop 11:06:04 -17.8 AT Down 46.7 231.8 Up 10:57:56 - 11:14:12 4001
Henderson 11:05:51 -16.6 AT Down 45.3 236.5 Up 10:57:43 - 11:13:59 3997
Patrick 11:05:46 -16.3 AT Down 44.9 238.2 Up 10:57:38 - 11:13:54 3980
DCO 11:05:44 -16.0 AT Down 44.5 239.1 Up 10:57:36 - 11:13:52 3977
Kingman/Dolan Springs 11:05:46 -16.6 AT Down 45.1 238.2 Up 10:57:38 - 11:13:54 3958
Searchlight/Boulder City 11:05:49 -16.9 AT Down 45.6 237.1 Up 10:57:41 - 11:13:57 3954
Lone Pine 11:06:01 -18.2 Dark Down 47.0 232.8 Up 10:57:53 - 11:14:09 3952
Laughlin/Bullhead City 11:05:47 -16.9 AT Down 45.5 237.7 Up 10:57:39 - 11:13:55 3941
Mohave Valley 11:05:46 -17.1 AT Down 45.6 237.9 Up 10:57:38 - 11:13:54 3919
Lake Havasu City 11:05:44 -17.2 AT Down 45.7 238.5 Up 10:57:36 - 11:13:52 3895
Parker 11:05:43 -17.4 AT Down 45.8 238.8 Up 10:57:35 - 11:13:51 3868
Blythe 11:05:43 -17.9 AT Down 46.3 239.0 Up 10:57:35 - 11:13:51 3818
CPSLO 11:06:05 -20.6 Dark Down 49.4 230.9 Up 10:57:57 - 11:14:13 3773
Idyllwild 11:05:49 -19.2 Dark Down 47.7 236.7 Up 10:57:41 - 11:13:57 3764
Calipatria 11:05:44 -18.8 Dark Down 47.3 238.5 Up 10:57:36 - 11:13:52 3750
Yuma 11:05:41 -18.5 Dark Down 46.8 239.8 Up 10:57:33 - 11:13:49 3742
Wildwood 11:05:56 -20.1 Dark Down 48.8 234.4 Up 10:57:48 - 11:14:04 3737

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 523789, (2019/05/12 11:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 32.48 103
Unukalhai      15:44:16.3 +06:25:33  2.6  9.15  84
21 Her         16:24:10.8 +06:56:54  5.8  1.24  94
PPM 162482     16:19:25.9 +05:32:17  8.0  0.60  93
PPM 162496     16:20:11.1 +05:43:02  9.7  0.34  93
523789         16:21:02.3 +05:59:17 16.9        93
Positions are for J2000

Event circumstances last updated at 2019/02/12 07:44:28 UT

Marc W. Buie, Southwest Research Institute

RECON