RECON: TNO occultation with 11JY31

Event between 11JY31 and star GA0680:34240236 with event index number of 215856

Geocentric closest approach at 2019/10/20 02:35:14 UTC

J2000 position of star is 19:09:12.7 -20:19:01
Equinox of date position of star is 19:10:18.1 -20:17:11
Stellar brightness G=14.9, use SENSEUP=128
Star is 172 degrees from the moon. Moon is 65% illuminated.
TNO apparent brightness V=25.2

[RECON map]
TNO is 42.4 AU from the Sun and 42.6 AU from the Earth.
The TNO is moving 10.3 km/sec on the sky relative to the star, or, 1.2 arcsec/hr.
The 1-sigma error in the time of the event is 1716 seconds.
The 1-sigma cross-track error in the shadow position is 3582 km.
The sky-plane scale is 30861.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.8
Diameter=103.8 km assuming a 5% albedo -- 10.0 sec chord
Diameter=42.4 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 11JY31, (2019/10/20 02:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:37.5 -26:28:27  0.9 37.03 151
Nunki          18:56:29.5 -26:16:13  2.0  6.78 175
PPM 235581     19:10:58.2 -19:46:15  6.4  0.53 172
PPM 269387     19:10:49.2 -20:00:28  8.4  0.29 172
PPM 269376     19:10:15.2 -20:08:57  9.4  0.14 172
11JY31         19:10:22.9 -20:17:02 14.9       172
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 0.5 sigma about the mid-time.
The median site spacing is 16.2 km RECON observability=0.8 and success probability=1.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 02:34:50 -16.1 AT Down 17.9 199.8 Really Low 02:19:50 - 02:49:50 14583
Oroville 02:34:52 -16.2 AT Down 18.4 200.0 Really Low 02:19:52 - 02:49:52 14556
Tonasket 02:34:54 -16.3 AT Down 18.6 200.0 Really Low 02:19:54 - 02:49:54 14547
Okanogan 02:34:54 -16.2 AT Down 19.0 199.9 Really Low 02:19:54 - 02:49:54 14534
Brewster 02:34:52 -16.0 AT Down 19.3 199.8 Really Low 02:19:52 - 02:49:52 14524
Manson/Chelan 02:34:50 -15.8 AT Down 19.6 199.4 Really Low 02:19:50 - 02:49:50 14519
Entiat 02:34:50 -15.8 AT Down 19.8 199.4 Really Low 02:19:50 - 02:49:50 14510
Wenatchee 02:34:50 -15.7 AT Down 20.1 199.3 Low 02:19:50 - 02:49:50 14500
Ellensburg 02:34:47 -15.6 AT Down 20.5 199.1 Low 02:19:47 - 02:49:47 14484
Yakima 02:34:51 -15.6 AT Down 20.9 199.2 Low 02:19:51 - 02:49:51 14465
Toppenish/White Swan 02:34:52 -15.7 AT Down 21.1 199.4 Low 02:19:52 - 02:49:52 14454
Pasco 02:35:03 -16.6 AT Down 20.9 200.7 Low 02:20:03 - 02:50:03 14434
Goldendale 02:34:52 -15.4 AT Down 21.7 199.0 Low 02:19:52 - 02:49:52 14432
The Dalles 02:34:50 -15.1 AT Down 22.0 198.7 Low 02:19:50 - 02:49:50 14426
George/Umatilla 02:35:02 -16.5 AT Down 21.2 200.5 Low 02:20:02 - 02:50:02 14420
PNWRO 02:35:05 -16.8 AT Down 21.0 201.0 Low 02:20:05 - 02:50:05 14419
Maupin 02:34:50 -15.2 AT Down 22.3 198.9 Low 02:19:50 - 02:49:50 14404
Madras/Culver 02:34:53 -15.2 AT Down 22.9 198.9 Low 02:19:53 - 02:49:53 14378
Sisters 02:34:50 -14.9 AT Down 23.3 198.5 Low 02:19:50 - 02:49:50 14367
Redmond 02:34:52 -15.2 AT Down 23.2 198.9 Low 02:19:52 - 02:49:52 14361
Bend 02:34:53 -15.1 AT Down 23.5 198.8 Low 02:19:53 - 02:49:53 14352
Oregon Observatory 02:34:51 -15.0 AT Down 23.7 198.7 Low 02:19:51 - 02:49:51 14345
La Pine/Gilchrist 02:34:53 -14.9 AT Down 23.9 198.7 Low 02:19:53 - 02:49:53 14335
North Lake 02:34:58 -15.4 AT Down 24.1 199.3 Low 02:19:58 - 02:49:58 14306
Chiloquin 02:34:50 -14.7 AT Down 25.0 198.5 Low 02:19:50 - 02:49:50 14281
Paisley 02:34:58 -15.7 AT Down 24.6 199.8 Low 02:19:58 - 02:49:58 14273
Klamath Falls 02:34:54 -14.7 AT Down 25.3 198.6 Low 02:19:54 - 02:49:54 14262
Tulelake 02:34:54 -15.0 AT Down 25.5 199.0 Low 02:19:54 - 02:49:54 14245
Lakeview 02:35:04 -15.8 AT Down 25.0 200.1 Low 02:20:04 - 02:50:04 14244
Cedarville 02:35:07 -16.0 AT Down 25.5 200.4 Low 02:20:07 - 02:50:07 14206
Fall River/Burney 02:34:59 -15.0 AT Down 26.3 199.2 Low 02:19:59 - 02:49:59 14194
Susanville 02:35:05 -15.6 AT Down 26.7 200.1 Low 02:20:05 - 02:50:05 14150
Greenville 02:35:04 -15.4 AT Down 27.1 199.8 Low 02:20:04 - 02:50:04 14138
Gimple 02:35:05 -15.5 AT Down 27.0 199.9 Low 02:20:05 - 02:50:05 14137
Quincy 02:35:04 -15.4 AT Down 27.2 199.9 Low 02:20:04 - 02:50:04 14127
Portola 02:35:08 -15.8 AT Down 27.2 200.4 Low 02:20:08 - 02:50:08 14114
Reno 02:35:15 -16.3 AT Down 27.3 201.1 Low 02:20:15 - 02:50:15 14090
Carson City 02:35:15 -16.3 AT Down 27.6 201.2 Low 02:20:15 - 02:50:15 14069
Gardnerville 02:35:17 -16.3 AT Down 27.8 201.3 Low 02:20:17 - 02:50:17 14054
Yerington 02:35:22 -16.8 AT Down 27.6 201.9 Low 02:20:22 - 02:50:22 14050
Hawthorne 02:35:27 -17.3 AT Down 27.9 202.6 Low 02:20:27 - 02:50:27 14015
Lee Vining 02:35:24 -16.9 AT Down 28.6 202.2 Low 02:20:24 - 02:50:24 13988
Tonopah 02:35:41 -18.4 Dark Down 27.9 204.1 Low 02:20:41 - 02:50:41 13967
Bishop 02:35:31 -17.5 AT Down 28.9 203.1 Low 02:20:31 - 02:50:31 13941
Niwot 02:36:25 -27.7 Dark Down 21.4 215.2 Low 02:21:25 - 02:51:25 13896
Beatty 02:35:46 -18.8 Dark Down 28.8 204.9 Low 02:20:46 - 02:50:46 13889
Lone Pine 02:35:36 -17.8 AT Down 29.5 203.6 Low 02:20:36 - 02:50:36 13889
Indian Springs 02:35:55 -19.7 Dark Down 28.7 206.1 Low 02:20:55 - 02:50:55 13853
CPSLO 02:35:17 -15.6 AT Down 31.5 201.1 Up 02:20:17 - 02:50:17 13841
Henderson 02:36:04 -20.3 Dark Down 28.9 206.9 Low 02:21:04 - 02:51:04 13808
Searchlight/Boulder City 02:36:05 -20.4 Dark Down 29.4 207.1 Low 02:21:05 - 02:51:05 13769
Patrick 02:36:12 -21.3 Dark Down 29.0 208.2 Low 02:21:12 - 02:51:12 13749
Laughlin/Bullhead City 02:36:08 -20.7 Dark Down 29.5 207.6 Low 02:21:08 - 02:51:08 13744
Kingman/Dolan Springs 02:36:14 -21.2 Dark Down 29.3 208.1 Low 02:21:14 - 02:51:14 13737
Wildwood 02:35:35 -17.3 AT Down 31.9 203.6 Up 02:20:35 - 02:50:35 13734
Mohave Valley 02:36:09 -20.7 Dark Down 29.7 207.6 Low 02:21:09 - 02:51:09 13726
DCO 02:36:22 -21.9 Dark Down 29.0 209.0 Low 02:21:22 - 02:51:22 13717
Lake Havasu City 02:36:14 -21.0 Dark Down 30.0 208.0 Low 02:21:14 - 02:51:14 13696
Idyllwild 02:35:53 -18.9 Dark Down 31.6 205.7 Up 02:20:53 - 02:50:53 13682
Parker 02:36:12 -21.0 Dark Down 30.3 208.1 Up 02:21:12 - 02:51:12 13671
Blythe 02:36:14 -20.8 Dark Down 30.9 208.0 Up 02:21:14 - 02:51:14 13641
Calipatria 02:36:07 -20.0 Dark Down 31.7 207.2 Up 02:21:07 - 02:51:07 13622
Yuma 02:36:15 -20.8 Dark Down 31.7 208.2 Up 02:21:15 - 02:51:15 13578

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 11JY31, (2019/10/20 02:35UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 37.03 151
Nunki          18:55:15.9 -26:17:49  2.0  6.78 175
PPM 235581     19:09:48.2 -19:48:15  6.4  0.53 172
PPM 269387     19:09:39.1 -20:02:28  8.4  0.29 172
PPM 269376     19:09:05.1 -20:10:56  9.4  0.14 172
11JY31         19:09:12.7 -20:19:01 14.9       172
Positions are for J2000

Event circumstances last updated at 2018/06/12 07:48:23 UT

Marc W. Buie, Southwest Research Institute

RECON