RECON: TNO occultation with 05JB186

Event between 05JB186 and star GA0720:06876832 with event index number of 116491

Geocentric closest approach at 2018/06/02 04:50:11 UTC

J2000 position of star is 16:57:32.6 -16:30:21
Equinox of date position of star is 16:58:36.3 -16:31:59
Stellar brightness G=14.5, use SENSEUP=128
Star is 37 degrees from the moon. Moon is 88% illuminated.
TNO apparent brightness V=23.5

[RECON map]
TNO is 37.3 AU from the Sun and 36.3 AU from the Earth.
The TNO is moving 24.5 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 563 seconds.
The 1-sigma cross-track error in the shadow position is 4941 km.
The sky-plane scale is 26319.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.8
Diameter=167.5 km assuming a 5% albedo -- 6.8 sec chord
Diameter=68.4 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is SCATEXTD

Star training set for 05JB186, (2018/06/02 04:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.4 -26:28:17  0.9 11.88  42
35Eta Oph      17:11:26.1 -15:44:47  2.6  3.18  34
PPM 232348     16:57:05.8 -16:50:03  6.3  0.47  37
PPM 232365     16:58:00.9 -16:37:25  9.6  0.17  37
05JB186        16:58:36.3 -16:31:59 14.5        37
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 1.6 sigma about the mid-time.
The median site spacing is 17.6 km RECON observability=0.3 and success probability=4.8%

Site Site mid-time
(UT) Sun alt
(deg) Sky Moon Star alt
(deg) Star az
(deg) Target Observing Time
(UT) X-track
(km)

Penticton 04:53:00 -7.6 CT Down 10.6 131.6 Really Low 04:38:00 - 05:08:00 -658

Oroville 04:53:01 -8.1 CT Down 11.0 131.6 Really Low 04:38:01 - 05:08:01 -694

Tonasket 04:53:01 -8.3 CT Down 11.2 131.6 Really Low 04:38:01 - 05:08:01 -709

Okanogan 04:53:02 -8.4 CT Down 11.3 131.4 Really Low 04:38:02 - 05:08:02 -735

Brewster 04:53:04 -8.6 CT Down 11.4 131.2 Really Low 04:38:04 - 05:08:04 -758

Manson/Chelan 04:53:04 -8.5 CT Down 11.4 130.9 Really Low 04:38:04 - 05:08:04 -781

Entiat 04:53:05 -8.7 CT Down 11.5 130.8 Really Low 04:38:05 - 05:08:05 -797

Wenatchee 04:53:06 -8.8 CT Down 11.6 130.7 Really Low 04:38:06 - 05:08:06 -817

Ellensburg 04:53:07 -9.0 CT Down 11.7 130.4 Really Low 04:38:07 - 05:08:07 -851

Pasco 04:53:06 -10.2 CT Down 13.0 131.5 Really Low 04:38:06 - 05:08:06 -866

PNWRO 04:53:06 -10.5 CT Down 13.2 131.6 Really Low 04:38:06 - 05:08:06 -877

Yakima 04:53:08 -9.3 CT Down 12.0 130.3 Really Low 04:38:08 - 05:08:08 -879

Toppenish/White Swan 04:53:08 -9.5 CT Down 12.2 130.4 Really Low 04:38:08 - 05:08:08 -890

George/Umatilla 04:53:07 -10.4 CT Down 13.1 131.2 Really Low 04:38:07 - 05:08:07 -895

Niwot 04:52:45 -21.2 Dark Down 24.3 142.1 Low 04:37:45 - 05:07:45 -933

Goldendale 04:53:10 -9.8 CT Down 12.4 130.0 Really Low 04:38:10 - 05:08:10 -940

The Dalles 04:53:11 -9.7 CT Down 12.3 129.7 Really Low 04:38:11 - 05:08:11 -965

Maupin 04:53:12 -10.1 CT Down 12.6 129.7 Really Low 04:38:12 - 05:08:12 -992

Madras/Culver 04:53:13 -10.5 CT Down 13.0 129.6 Really Low 04:38:13 - 05:08:13 -1032

Redmond 04:53:14 -10.7 CT Down 13.2 129.5 Really Low 04:38:14 - 05:08:14 -1059

Sisters 04:53:15 -10.5 CT Down 12.9 129.1 Really Low 04:38:15 - 05:08:15 -1068

Bend 04:53:15 -10.8 CT Down 13.2 129.3 Really Low 04:38:15 - 05:08:15 -1079

Oregon Observatory 04:53:15 -10.9 CT Down 13.3 129.2 Really Low 04:38:15 - 05:08:15 -1095

La Pine/Gilchrist 04:53:15 -11.0 CT Down 13.4 129.1 Really Low 04:38:15 - 05:08:15 -1112

North Lake 04:53:15 -11.6 CT Down 14.0 129.5 Really Low 04:38:15 - 05:08:15 -1127

Paisley 04:53:16 -12.2 AT Down 14.5 129.7 Really Low 04:38:16 - 05:08:16 -1158

Lakeview 04:53:16 -12.6 AT Down 15.0 129.7 Really Low 04:38:16 - 05:08:16 -1191

Chiloquin 04:53:19 -11.6 CT Down 13.9 128.6 Really Low 04:38:19 - 05:08:19 -1204

Klamath Falls 04:53:19 -11.9 CT Down 14.1 128.6 Really Low 04:38:19 - 05:08:19 -1227

Cedarville 04:53:17 -13.2 AT Down 15.5 129.7 Really Low 04:38:17 - 05:08:17 -1236

Tulelake 04:53:19 -12.2 AT Down 14.5 128.8 Really Low 04:38:19 - 05:08:19 -1239

Fall River/Burney 04:53:20 -12.9 AT Down 15.1 128.7 Really Low 04:38:20 - 05:08:20 -1306

Susanville 04:53:20 -13.8 AT Down 15.9 129.1 Really Low 04:38:20 - 05:08:20 -1334

Gimple 04:53:21 -13.9 AT Down 16.0 128.9 Really Low 04:38:21 - 05:08:21 -1362

Greenville 04:53:21 -13.8 AT Down 15.9 128.8 Really Low 04:38:21 - 05:08:21 -1364

Portola 04:53:21 -14.3 AT Down 16.4 129.1 Really Low 04:38:21 - 05:08:21 -1376

Reno 04:53:20 -14.8 AT Down 17.0 129.6 Really Low 04:38:20 - 05:08:20 -1378

Quincy 04:53:22 -14.0 AT Down 16.1 128.8 Really Low 04:38:22 - 05:08:22 -1380

Yerington 04:53:19 -15.6 AT Down 17.7 130.0 Really Low 04:38:19 - 05:08:19 -1403

Carson City 04:53:20 -15.1 AT Down 17.2 129.5 Really Low 04:38:20 - 05:08:20 -1406

Tonopah 04:53:17 -17.3 AT Down 19.5 131.3 Really Low 04:38:17 - 05:08:17 -1420

Gardnerville 04:53:21 -15.3 AT Down 17.4 129.5 Really Low 04:38:21 - 05:08:21 -1423

Hawthorne 04:53:19 -16.2 AT Down 18.3 130.3 Really Low 04:38:19 - 05:08:19 -1424

Lee Vining 04:53:21 -16.4 AT Down 18.4 129.7 Really Low 04:38:21 - 05:08:21 -1483

Indian Springs 04:53:15 -19.2 Dark Down 21.4 132.1 Low 04:38:15 - 05:08:15 -1493

Beatty 04:53:17 -18.4 Dark Down 20.5 131.3 Low 04:38:17 - 05:08:17 -1499

Bishop 04:53:20 -17.2 AT Down 19.2 130.2 Really Low 04:38:20 - 05:08:20 -1509

Henderson 04:53:15 -20.0 Dark Down 22.1 132.5 Low 04:38:15 - 05:08:15 -1516

Patrick 04:53:12 -21.0 Dark Down 23.2 133.2 Low 04:38:12 - 05:08:12 -1533

DCO 04:53:11 -21.6 Dark Down 23.9 133.7 Low 04:38:11 - 05:08:11 -1537

Kingman/Dolan Springs 04:53:13 -21.1 Dark Down 23.3 133.0 Low 04:38:13 - 05:08:13 -1557

Searchlight/Boulder City 04:53:15 -20.5 Dark Down 22.6 132.4 Low 04:38:15 - 05:08:15 -1560

Lone Pine 04:53:21 -17.9 AT Down 19.9 130.2 Really Low 04:38:21 - 05:08:21 -1561

Laughlin/Bullhead City 04:53:15 -20.9 Dark Down 23.0 132.5 Low 04:38:15 - 05:08:15 -1574

Mohave Valley 04:53:15 -21.1 Dark Down 23.2 132.5 Low 04:38:15 - 05:08:15 -1596

Lake Havasu City 04:53:15 -21.5 Dark Down 23.6 132.5 Low 04:38:15 - 05:08:15 -1621

Parker 04:53:15 -21.8 Dark Down 23.8 132.5 Low 04:38:15 - 05:08:15 -1649

Blythe 04:53:16 -22.0 Dark Down 24.0 132.0 Low 04:38:16 - 05:08:16 -1702

CPSLO 04:53:28 -17.4 AT Down 19.1 127.9 Really Low 04:38:28 - 05:08:28 -1744

Idyllwild 04:53:22 -20.8 Dark Down 22.6 130.4 Low 04:38:22 - 05:08:22 -1756

Calipatria 04:53:19 -21.9 Dark Down 23.8 131.1 Low 04:38:19 - 05:08:19 -1771

Yuma 04:53:18 -22.7 Dark Down 24.6 131.7 Low 04:38:18 - 05:08:18 -1780

Wildwood 04:53:26 -19.5 Dark Down 21.2 129.1 Low 04:38:26 - 05:08:26 -1783

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 05JB186, (2018/06/02 04:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 11.88  42
35Eta Oph      17:10:22.7 -15:43:29  2.6  3.18  34
PPM 232348     16:56:02.0 -16:48:22  6.3  0.47  37
PPM 232365     16:56:57.2 -16:35:45  9.6  0.17  37
05JB186        16:57:32.6 -16:30:21 14.5        37
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:04:49 UT

Marc W. Buie, Southwest Research Institute

RECON

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Penticton	04:53:00	-7.6	CT	Down	10.6	131.6	Really Low	04:38:00 - 05:08:00	-658
Oroville	04:53:01	-8.1	CT	Down	11.0	131.6	Really Low	04:38:01 - 05:08:01	-694
Tonasket	04:53:01	-8.3	CT	Down	11.2	131.6	Really Low	04:38:01 - 05:08:01	-709
Okanogan	04:53:02	-8.4	CT	Down	11.3	131.4	Really Low	04:38:02 - 05:08:02	-735
Brewster	04:53:04	-8.6	CT	Down	11.4	131.2	Really Low	04:38:04 - 05:08:04	-758
Manson/Chelan	04:53:04	-8.5	CT	Down	11.4	130.9	Really Low	04:38:04 - 05:08:04	-781
Entiat	04:53:05	-8.7	CT	Down	11.5	130.8	Really Low	04:38:05 - 05:08:05	-797
Wenatchee	04:53:06	-8.8	CT	Down	11.6	130.7	Really Low	04:38:06 - 05:08:06	-817
Ellensburg	04:53:07	-9.0	CT	Down	11.7	130.4	Really Low	04:38:07 - 05:08:07	-851
Pasco	04:53:06	-10.2	CT	Down	13.0	131.5	Really Low	04:38:06 - 05:08:06	-866
PNWRO	04:53:06	-10.5	CT	Down	13.2	131.6	Really Low	04:38:06 - 05:08:06	-877
Yakima	04:53:08	-9.3	CT	Down	12.0	130.3	Really Low	04:38:08 - 05:08:08	-879
Toppenish/White Swan	04:53:08	-9.5	CT	Down	12.2	130.4	Really Low	04:38:08 - 05:08:08	-890
George/Umatilla	04:53:07	-10.4	CT	Down	13.1	131.2	Really Low	04:38:07 - 05:08:07	-895
Niwot	04:52:45	-21.2	Dark	Down	24.3	142.1	Low	04:37:45 - 05:07:45	-933
Goldendale	04:53:10	-9.8	CT	Down	12.4	130.0	Really Low	04:38:10 - 05:08:10	-940
The Dalles	04:53:11	-9.7	CT	Down	12.3	129.7	Really Low	04:38:11 - 05:08:11	-965
Maupin	04:53:12	-10.1	CT	Down	12.6	129.7	Really Low	04:38:12 - 05:08:12	-992
Madras/Culver	04:53:13	-10.5	CT	Down	13.0	129.6	Really Low	04:38:13 - 05:08:13	-1032
Redmond	04:53:14	-10.7	CT	Down	13.2	129.5	Really Low	04:38:14 - 05:08:14	-1059
Sisters	04:53:15	-10.5	CT	Down	12.9	129.1	Really Low	04:38:15 - 05:08:15	-1068
Bend	04:53:15	-10.8	CT	Down	13.2	129.3	Really Low	04:38:15 - 05:08:15	-1079
Oregon Observatory	04:53:15	-10.9	CT	Down	13.3	129.2	Really Low	04:38:15 - 05:08:15	-1095
La Pine/Gilchrist	04:53:15	-11.0	CT	Down	13.4	129.1	Really Low	04:38:15 - 05:08:15	-1112
North Lake	04:53:15	-11.6	CT	Down	14.0	129.5	Really Low	04:38:15 - 05:08:15	-1127
Paisley	04:53:16	-12.2	AT	Down	14.5	129.7	Really Low	04:38:16 - 05:08:16	-1158
Lakeview	04:53:16	-12.6	AT	Down	15.0	129.7	Really Low	04:38:16 - 05:08:16	-1191
Chiloquin	04:53:19	-11.6	CT	Down	13.9	128.6	Really Low	04:38:19 - 05:08:19	-1204
Klamath Falls	04:53:19	-11.9	CT	Down	14.1	128.6	Really Low	04:38:19 - 05:08:19	-1227
Cedarville	04:53:17	-13.2	AT	Down	15.5	129.7	Really Low	04:38:17 - 05:08:17	-1236
Tulelake	04:53:19	-12.2	AT	Down	14.5	128.8	Really Low	04:38:19 - 05:08:19	-1239
Fall River/Burney	04:53:20	-12.9	AT	Down	15.1	128.7	Really Low	04:38:20 - 05:08:20	-1306
Susanville	04:53:20	-13.8	AT	Down	15.9	129.1	Really Low	04:38:20 - 05:08:20	-1334
Gimple	04:53:21	-13.9	AT	Down	16.0	128.9	Really Low	04:38:21 - 05:08:21	-1362
Greenville	04:53:21	-13.8	AT	Down	15.9	128.8	Really Low	04:38:21 - 05:08:21	-1364
Portola	04:53:21	-14.3	AT	Down	16.4	129.1	Really Low	04:38:21 - 05:08:21	-1376
Reno	04:53:20	-14.8	AT	Down	17.0	129.6	Really Low	04:38:20 - 05:08:20	-1378
Quincy	04:53:22	-14.0	AT	Down	16.1	128.8	Really Low	04:38:22 - 05:08:22	-1380
Yerington	04:53:19	-15.6	AT	Down	17.7	130.0	Really Low	04:38:19 - 05:08:19	-1403
Carson City	04:53:20	-15.1	AT	Down	17.2	129.5	Really Low	04:38:20 - 05:08:20	-1406
Tonopah	04:53:17	-17.3	AT	Down	19.5	131.3	Really Low	04:38:17 - 05:08:17	-1420
Gardnerville	04:53:21	-15.3	AT	Down	17.4	129.5	Really Low	04:38:21 - 05:08:21	-1423
Hawthorne	04:53:19	-16.2	AT	Down	18.3	130.3	Really Low	04:38:19 - 05:08:19	-1424
Lee Vining	04:53:21	-16.4	AT	Down	18.4	129.7	Really Low	04:38:21 - 05:08:21	-1483
Indian Springs	04:53:15	-19.2	Dark	Down	21.4	132.1	Low	04:38:15 - 05:08:15	-1493
Beatty	04:53:17	-18.4	Dark	Down	20.5	131.3	Low	04:38:17 - 05:08:17	-1499
Bishop	04:53:20	-17.2	AT	Down	19.2	130.2	Really Low	04:38:20 - 05:08:20	-1509
Henderson	04:53:15	-20.0	Dark	Down	22.1	132.5	Low	04:38:15 - 05:08:15	-1516
Patrick	04:53:12	-21.0	Dark	Down	23.2	133.2	Low	04:38:12 - 05:08:12	-1533
DCO	04:53:11	-21.6	Dark	Down	23.9	133.7	Low	04:38:11 - 05:08:11	-1537
Kingman/Dolan Springs	04:53:13	-21.1	Dark	Down	23.3	133.0	Low	04:38:13 - 05:08:13	-1557
Searchlight/Boulder City	04:53:15	-20.5	Dark	Down	22.6	132.4	Low	04:38:15 - 05:08:15	-1560
Lone Pine	04:53:21	-17.9	AT	Down	19.9	130.2	Really Low	04:38:21 - 05:08:21	-1561
Laughlin/Bullhead City	04:53:15	-20.9	Dark	Down	23.0	132.5	Low	04:38:15 - 05:08:15	-1574
Mohave Valley	04:53:15	-21.1	Dark	Down	23.2	132.5	Low	04:38:15 - 05:08:15	-1596
Lake Havasu City	04:53:15	-21.5	Dark	Down	23.6	132.5	Low	04:38:15 - 05:08:15	-1621
Parker	04:53:15	-21.8	Dark	Down	23.8	132.5	Low	04:38:15 - 05:08:15	-1649
Blythe	04:53:16	-22.0	Dark	Down	24.0	132.0	Low	04:38:16 - 05:08:16	-1702
CPSLO	04:53:28	-17.4	AT	Down	19.1	127.9	Really Low	04:38:28 - 05:08:28	-1744
Idyllwild	04:53:22	-20.8	Dark	Down	22.6	130.4	Low	04:38:22 - 05:08:22	-1756
Calipatria	04:53:19	-21.9	Dark	Down	23.8	131.1	Low	04:38:19 - 05:08:19	-1771
Yuma	04:53:18	-22.7	Dark	Down	24.6	131.7	Low	04:38:18 - 05:08:18	-1780
Wildwood	04:53:26	-19.5	Dark	Down	21.2	129.1	Low	04:38:26 - 05:08:26	-1783