RECON: TNO occultation with 11JY31

Event between 11JY31 and star UC4-350-173862 with event index number of 203339

Geocentric closest approach at 2019/06/05 07:11:22 UTC

J2000 position of star is 19:15:54.4 -20:04:53
Equinox of date position of star is 19:16:56.6 -20:02:58
Stellar brightness R=15.9, use SENSEUP=128
Star is 171 degrees from the moon. Moon is 4% illuminated.
TNO apparent brightness V=25.1

[RECON map]
TNO is 42.4 AU from the Sun and 41.6 AU from the Earth.
The TNO is moving 19.6 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 1083 seconds.
The 1-sigma cross-track error in the shadow position is 2120 km.
The sky-plane scale is 30142.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.8
Diameter=103.8 km assuming a 5% albedo -- 5.3 sec chord
Diameter=42.4 km assuming a 30% albedo -- 2.2 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 11JY31, (2019/06/05 07:11UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.1 -26:28:24  0.9 38.60 151
Nunki          18:56:28.1 -26:16:15  2.0  7.82 174
43 Sgr         19:18:46.2 -18:55:01  4.9  1.20 170
PPM 235722     19:16:34.9 -19:45:07  8.1  0.31 171
PPM 269520     19:16:00.1 -19:59:57  9.6  0.25 171
11JY31         19:17:03.1 -20:02:45 15.9       171
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 0.8 sigma about the mid-time.
The median site spacing is 17.7 km RECON observability=0.3 and success probability=2.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 07:13:29 -17.9 AT Down 9.5 136.2 Really Low 06:58:29 - 07:28:29 4965
Tonasket 07:13:30 -18.1 Dark Down 9.7 136.2 Really Low 06:58:30 - 07:28:30 4955
Okanogan 07:13:32 -18.5 Dark Down 9.8 136.0 Really Low 06:58:32 - 07:28:32 4938
Brewster 07:13:33 -18.7 Dark Down 9.9 135.8 Really Low 06:58:33 - 07:28:33 4923
Manson/Chelan 07:13:35 -18.9 Dark Down 9.9 135.5 Really Low 06:58:35 - 07:28:35 4909
Entiat 07:13:36 -19.1 Dark Down 10.1 135.4 Really Low 06:58:36 - 07:28:36 4898
Wenatchee 07:13:37 -19.3 Dark Down 10.2 135.3 Really Low 06:58:37 - 07:28:37 4885
Ellensburg 07:13:39 -19.7 Dark Down 10.4 135.1 Really Low 06:58:39 - 07:28:39 4863
Pasco 07:13:37 -20.6 Dark Down 11.6 136.2 Really Low 06:58:37 - 07:28:37 4848
Yakima 07:13:40 -20.1 Dark Down 10.7 135.0 Really Low 06:58:40 - 07:28:40 4844
PNWRO 07:13:38 -20.9 Dark Down 11.9 136.3 Really Low 06:58:38 - 07:28:38 4840
Toppenish/White Swan 07:13:41 -20.3 Dark Down 10.9 135.1 Really Low 06:58:41 - 07:28:41 4836
George/Umatilla 07:13:39 -20.9 Dark Down 11.7 135.9 Really Low 06:58:39 - 07:28:39 4829
Goldendale 07:13:44 -20.8 Dark Down 11.1 134.7 Really Low 06:58:44 - 07:28:44 4803
The Dalles 07:13:45 -21.0 Dark Down 11.1 134.4 Really Low 06:58:45 - 07:28:45 4787
Maupin 07:13:47 -21.4 Dark Down 11.4 134.4 Really Low 06:58:47 - 07:28:47 4768
Madras/Culver 07:13:48 -21.9 Dark Down 11.8 134.3 Really Low 06:58:48 - 07:28:48 4740
Redmond 07:13:49 -22.3 Dark Down 12.0 134.2 Really Low 06:58:49 - 07:28:49 4721
Sisters 07:13:50 -22.2 Dark Down 11.8 133.9 Really Low 06:58:50 - 07:28:50 4716
Bend 07:13:50 -22.4 Dark Down 12.1 134.1 Really Low 06:58:50 - 07:28:50 4708
Oregon Observatory 07:13:50 -22.6 Dark Down 12.1 134.0 Really Low 06:58:50 - 07:28:50 4697
Niwot 07:13:08 -27.3 Dark Down 22.7 146.9 Low 06:58:08 - 07:28:08 4696
La Pine/Gilchrist 07:13:51 -22.8 Dark Down 12.2 133.9 Really Low 06:58:51 - 07:28:51 4686
North Lake 07:13:51 -23.3 Dark Down 12.9 134.3 Really Low 06:58:51 - 07:28:51 4672
Paisley 07:13:53 -23.9 Dark Down 13.4 134.5 Really Low 06:58:53 - 07:28:53 4648
Lakeview 07:13:53 -24.4 Dark Down 13.9 134.6 Really Low 06:58:53 - 07:28:53 4624
Chiloquin 07:13:57 -23.8 Dark Down 12.8 133.4 Really Low 06:58:57 - 07:28:57 4621
Klamath Falls 07:13:57 -24.2 Dark Down 13.1 133.4 Really Low 06:58:57 - 07:28:57 4604
Tulelake 07:13:57 -24.5 Dark Down 13.5 133.6 Really Low 06:58:57 - 07:28:57 4594
Cedarville 07:13:54 -25.1 Dark Down 14.5 134.6 Really Low 06:58:54 - 07:28:54 4591
Fall River/Burney 07:13:59 -25.4 Dark Down 14.1 133.5 Really Low 06:58:59 - 07:28:59 4544
Susanville 07:13:58 -26.1 Dark Down 15.0 134.0 Really Low 06:58:58 - 07:28:58 4520
Gimple 07:14:01 -26.4 Dark Down 15.1 133.8 Really Low 06:59:01 - 07:29:01 4501
Greenville 07:14:01 -26.3 Dark Down 15.0 133.7 Really Low 06:59:01 - 07:29:01 4499
Portola 07:14:01 -26.7 Dark Down 15.5 134.0 Really Low 06:59:01 - 07:29:01 4488
Quincy 07:14:01 -26.5 Dark Down 15.2 133.7 Really Low 06:59:01 - 07:29:01 4488
Reno 07:13:59 -27.1 Dark Down 16.1 134.5 Really Low 06:58:59 - 07:28:59 4483
Carson City 07:14:00 -27.5 Dark Down 16.3 134.4 Really Low 06:59:00 - 07:29:00 4462
Yerington 07:13:59 -27.7 Dark Down 16.8 134.9 Really Low 06:58:59 - 07:28:59 4461
Gardnerville 07:14:01 -27.7 Dark Down 16.5 134.4 Really Low 06:59:01 - 07:29:01 4449
Hawthorne 07:13:58 -28.3 Dark Down 17.4 135.2 Really Low 06:58:58 - 07:28:58 4441
Tonopah 07:13:55 -28.9 Dark Down 18.5 136.2 Really Low 06:58:55 - 07:28:55 4435
Lee Vining 07:14:01 -28.8 Dark Down 17.6 134.7 Really Low 06:59:01 - 07:29:01 4400
Bishop 07:14:01 -29.5 Dark Down 18.4 135.2 Really Low 06:59:01 - 07:29:01 4374
Beatty 07:13:57 -30.1 Dark Down 19.6 136.3 Really Low 06:58:57 - 07:28:57 4370
Indian Springs 07:13:53 -30.6 Dark Down 20.4 137.1 Low 06:58:53 - 07:28:53 4365
Henderson 07:13:53 -31.2 Dark Down 21.2 137.6 Low 06:58:53 - 07:28:53 4341
Lone Pine 07:14:02 -30.2 Dark Down 19.1 135.2 Really Low 06:59:02 - 07:29:02 4332
Patrick 07:13:51 -31.9 Dark Down 22.3 138.3 Low 06:58:51 - 07:28:51 4317
DCO 07:13:49 -32.2 Dark Down 22.9 138.8 Low 06:58:49 - 07:28:49 4308
Searchlight/Boulder City 07:13:54 -31.7 Dark Down 21.7 137.5 Low 06:58:54 - 07:28:54 4306
Kingman/Dolan Springs 07:13:52 -32.1 Dark Down 22.4 138.1 Low 06:58:52 - 07:28:52 4301
Laughlin/Bullhead City 07:13:54 -32.1 Dark Down 22.1 137.7 Low 06:58:54 - 07:28:54 4291
Mohave Valley 07:13:54 -32.3 Dark Down 22.3 137.6 Low 06:58:54 - 07:28:54 4274
Lake Havasu City 07:13:54 -32.8 Dark Down 22.7 137.7 Low 06:58:54 - 07:28:54 4251
Parker 07:13:55 -33.1 Dark Down 23.0 137.6 Low 06:58:55 - 07:28:55 4228
CPSLO 07:14:14 -31.1 Dark Down 18.5 132.9 Really Low 06:59:14 - 07:29:14 4205
Blythe 07:13:57 -33.6 Dark Down 23.2 137.2 Low 06:58:57 - 07:28:57 4189
Idyllwild 07:14:05 -33.3 Dark Down 21.9 135.6 Low 06:59:05 - 07:29:05 4167
Wildwood 07:14:11 -32.6 Dark Down 20.6 134.2 Low 06:59:11 - 07:29:11 4160
Calipatria 07:14:02 -34.0 Dark Down 23.1 136.3 Low 06:59:02 - 07:29:02 4142
Yuma 07:14:00 -34.5 Dark Down 23.9 136.9 Low 06:59:00 - 07:29:00 4126

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, (2019/06/05 07:11UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 38.60 151
Nunki          18:55:15.9 -26:17:49  2.0  7.82 174
43 Sgr         19:17:38.1 -18:57:11  4.9  1.20 170
PPM 235722     19:15:26.3 -19:47:14  8.1  0.31 171
PPM 269520     19:14:51.4 -20:02:03  9.6  0.25 171
11JY31         19:15:54.4 -20:04:53 15.9       171
Positions are for J2000

Event circumstances last updated at 2017/08/04 18:07:03 UT

Marc W. Buie, Southwest Research Institute

RECON