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 19:16:57.8 -20:02:55
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 17.5 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 07:13:30 -17.9 AT Down 9.5 136.2 Really Low 06:58:30 - 07:28:30 4960
Tonasket 07:13:31 -18.1 Dark Down 9.7 136.2 Really Low 06:58:31 - 07:28:31 4951
Okanogan 07:13:33 -18.5 Dark Down 9.8 136.0 Really Low 06:58:33 - 07:28:33 4934
Brewster 07:13:34 -18.7 Dark Down 9.9 135.8 Really Low 06:58:34 - 07:28:34 4919
Manson/Chelan 07:13:35 -18.9 Dark Down 9.9 135.5 Really Low 06:58:35 - 07:28:35 4905
Entiat 07:13:36 -19.1 Dark Down 10.1 135.4 Really Low 06:58:36 - 07:28:36 4894
Wenatchee 07:13:37 -19.3 Dark Down 10.2 135.3 Really Low 06:58:37 - 07:28:37 4881
Ellensburg 07:13:39 -19.7 Dark Down 10.4 135.1 Really Low 06:58:39 - 07:28:39 4858
Pasco 07:13:38 -20.6 Dark Down 11.6 136.2 Really Low 06:58:38 - 07:28:38 4844
Yakima 07:13:41 -20.1 Dark Down 10.7 135.0 Really Low 06:58:41 - 07:28:41 4839
PNWRO 07:13:39 -20.9 Dark Down 11.9 136.3 Really Low 06:58:39 - 07:28:39 4835
Toppenish/White Swan 07:13:42 -20.3 Dark Down 10.9 135.1 Really Low 06:58:42 - 07:28:42 4831
George/Umatilla 07:13:40 -20.9 Dark Down 11.7 135.9 Really Low 06:58:40 - 07:28:40 4825
Goldendale 07:13:44 -20.8 Dark Down 11.1 134.7 Really Low 06:58:44 - 07:28:44 4799
The Dalles 07:13:45 -21.0 Dark Down 11.1 134.4 Really Low 06:58:45 - 07:28:45 4782
Maupin 07:13:47 -21.4 Dark Down 11.4 134.4 Really Low 06:58:47 - 07:28:47 4763
Madras/Culver 07:13:49 -21.9 Dark Down 11.8 134.3 Really Low 06:58:49 - 07:28:49 4735
Redmond 07:13:50 -22.3 Dark Down 12.0 134.2 Really Low 06:58:50 - 07:28:50 4716
Sisters 07:13:51 -22.2 Dark Down 11.8 133.9 Really Low 06:58:51 - 07:28:51 4711
Bend 07:13:51 -22.4 Dark Down 12.1 134.1 Really Low 06:58:51 - 07:28:51 4703
Oregon Observatory 07:13:52 -22.6 Dark Down 12.1 134.0 Really Low 06:58:52 - 07:28:52 4692
Niwot 07:13:10 -27.3 Dark Down 22.7 146.9 Low 06:58:10 - 07:28:10 4691
La Pine/Gilchrist 07:13:53 -22.8 Dark Down 12.3 133.9 Really Low 06:58:53 - 07:28:53 4680
North Lake 07:13:53 -23.3 Dark Down 12.9 134.3 Really Low 06:58:53 - 07:28:53 4667
Paisley 07:13:53 -23.9 Dark Down 13.4 134.5 Really Low 06:58:53 - 07:28:53 4643
Lakeview 07:13:54 -24.4 Dark Down 13.9 134.6 Really Low 06:58:54 - 07:28:54 4618
Chiloquin 07:13:58 -23.8 Dark Down 12.8 133.4 Really Low 06:58:58 - 07:28:58 4615
Klamath Falls 07:13:59 -24.2 Dark Down 13.1 133.5 Really Low 06:58:59 - 07:28:59 4598
Tulelake 07:13:58 -24.5 Dark Down 13.5 133.6 Really Low 06:58:58 - 07:28:58 4588
Cedarville 07:13:56 -25.1 Dark Down 14.5 134.6 Really Low 06:58:56 - 07:28:56 4585
Fall River/Burney 07:14:01 -25.4 Dark Down 14.1 133.6 Really Low 06:59:01 - 07:29:01 4538
Susanville 07:14:01 -26.1 Dark Down 15.0 134.0 Really Low 06:59:01 - 07:29:01 4514
Gimple 07:14:02 -26.4 Dark Down 15.1 133.8 Really Low 06:59:02 - 07:29:02 4495
Greenville 07:14:02 -26.3 Dark Down 15.0 133.7 Really Low 06:59:02 - 07:29:02 4494
Portola 07:14:01 -26.7 Dark Down 15.5 134.1 Really Low 06:59:01 - 07:29:01 4482
Quincy 07:14:03 -26.5 Dark Down 15.2 133.7 Really Low 06:59:03 - 07:29:03 4482
Reno 07:14:01 -27.1 Dark Down 16.1 134.5 Really Low 06:59:01 - 07:29:01 4477
Carson City 07:14:01 -27.5 Dark Down 16.3 134.5 Really Low 06:59:01 - 07:29:01 4456
Yerington 07:14:00 -27.7 Dark Down 16.8 134.9 Really Low 06:59:00 - 07:29:00 4455
Gardnerville 07:14:02 -27.7 Dark Down 16.5 134.4 Really Low 06:59:02 - 07:29:02 4443
Hawthorne 07:14:00 -28.3 Dark Down 17.4 135.2 Really Low 06:59:00 - 07:29:00 4435
Tonopah 07:13:57 -28.9 Dark Down 18.5 136.3 Really Low 06:58:57 - 07:28:57 4429
Lee Vining 07:14:02 -28.8 Dark Down 17.6 134.7 Really Low 06:59:02 - 07:29:02 4394
Bishop 07:14:02 -29.5 Dark Down 18.4 135.2 Really Low 06:59:02 - 07:29:02 4368
Beatty 07:13:58 -30.1 Dark Down 19.6 136.3 Really Low 06:58:58 - 07:28:58 4365
Indian Springs 07:13:55 -30.6 Dark Down 20.4 137.1 Low 06:58:55 - 07:28:55 4360
Henderson 07:13:55 -31.2 Dark Down 21.2 137.6 Low 06:58:55 - 07:28:55 4337
Lone Pine 07:14:03 -30.2 Dark Down 19.1 135.2 Really Low 06:59:03 - 07:29:03 4326
Patrick 07:13:52 -31.9 Dark Down 22.3 138.3 Low 06:58:52 - 07:28:52 4313
DCO 07:13:51 -32.2 Dark Down 22.9 138.8 Low 06:58:51 - 07:28:51 4303
Searchlight/Boulder City 07:13:56 -31.7 Dark Down 21.7 137.5 Low 06:58:56 - 07:28:56 4301
Kingman/Dolan Springs 07:13:53 -32.1 Dark Down 22.4 138.1 Low 06:58:53 - 07:28:53 4296
Laughlin/Bullhead City 07:13:55 -32.1 Dark Down 22.1 137.7 Low 06:58:55 - 07:28:55 4287
Mohave Valley 07:13:56 -32.3 Dark Down 22.3 137.6 Low 06:58:56 - 07:28:56 4269
Lake Havasu City 07:13:56 -32.8 Dark Down 22.7 137.7 Low 06:58:56 - 07:28:56 4247
Parker 07:13:57 -33.1 Dark Down 23.0 137.6 Low 06:58:57 - 07:28:57 4224
CPSLO 07:14:15 -31.1 Dark Down 18.5 132.9 Really Low 06:59:15 - 07:29:15 4200
Blythe 07:13:59 -33.6 Dark Down 23.2 137.2 Low 06:58:59 - 07:28:59 4185
Idyllwild 07:14:07 -33.3 Dark Down 21.9 135.6 Low 06:59:07 - 07:29:07 4161
Wildwood 07:14:12 -32.6 Dark Down 20.6 134.2 Low 06:59:12 - 07:29:12 4155
Calipatria 07:14:04 -34.0 Dark Down 23.1 136.3 Low 06:59:04 - 07:29:04 4138
Yuma 07:14:01 -34.5 Dark Down 23.9 136.9 Low 06:59:01 - 07:29:01 4122

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 2017/12/06 19:00:24 UT

Marc W. Buie, Southwest Research Institute

RECON