RECON: TNO occultation with 250112

Event between (250112) 02KY14 and star GA0980:02216366 with event index number of 248080

Geocentric closest approach at 2020/02/18 05:25:25 UTC

J2000 position of star is 06:45:30.6 +09:40:37
Equinox of date position of star is 06:46:31.4 +09:39:23
Stellar brightness G=9.1, use SENSEUP=2
Star is 161 degrees from the moon. Moon is 26% illuminated.
TNO apparent brightness V=21.2

[RECON map]
TNO is 13.5 AU from the Sun and 12.9 AU from the Earth.
The TNO is moving 13.9 km/sec on the sky relative to the star, or, 5.3 arcsec/hr.
The 1-sigma error in the time of the event is 74 seconds.
The 1-sigma cross-track error in the shadow position is 616 km.
The sky-plane scale is 9329.4 km/arcsec.

The TNO has an absolute magnitude Hv=9.7
Diameter=69.2 km assuming a 5% albedo -- 5.0 sec chord
Diameter=28.2 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR

Star training set for 250112, (2020/02/18 05:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:15.7 +07:24:33  0.4 12.65 165
Alhena         06:38:52.5 +16:22:50  1.9  6.98 167
16 Mon         06:47:38.3 +08:33:51  5.9  1.12 160
PPM 151177     06:46:20.2 +09:39:56  7.7  0.07 161
250112         06:46:36.9 +09:39:17  9.1       161
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 20.3 km RECON observability=1.0 and success probability=32.8%

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

Penticton 05:22:19 -38.6 Dark Down 49.7 191.2 Up 05:15:41 - 05:28:58 1646

Oroville 05:22:17 -39.0 Dark Down 50.3 191.5 Up 05:15:38 - 05:28:55 1601

Tonasket 05:22:16 -39.1 Dark Down 50.5 191.5 Up 05:15:38 - 05:28:55 1583

Okanogan 05:22:16 -39.2 Dark Down 50.8 191.4 Up 05:15:38 - 05:28:55 1552

Brewster 05:22:16 -39.3 Dark Down 51.1 191.1 Up 05:15:38 - 05:28:55 1526

Manson/Chelan 05:22:18 -39.2 Dark Down 51.4 190.6 Up 05:15:39 - 05:28:56 1501

Entiat 05:22:18 -39.2 Dark Down 51.6 190.5 Up 05:15:39 - 05:28:56 1481

Wenatchee 05:22:17 -39.3 Dark Down 51.9 190.4 Up 05:15:39 - 05:28:56 1458

Ellensburg 05:22:18 -39.4 Dark Down 52.3 190.2 Up 05:15:39 - 05:28:56 1419

Pasco 05:22:09 -40.6 Dark Down 52.8 192.6 Up 05:15:30 - 05:28:47 1392

Yakima 05:22:16 -39.6 Dark Down 52.7 190.3 Up 05:15:38 - 05:28:55 1386

PNWRO 05:22:07 -40.8 Dark Down 53.0 193.0 Up 05:15:28 - 05:28:45 1377

Toppenish/White Swan 05:22:16 -39.8 Dark Down 52.9 190.6 Up 05:15:37 - 05:28:54 1372

George/Umatilla 05:22:09 -40.6 Dark Down 53.2 192.4 Up 05:15:31 - 05:28:48 1359

Goldendale 05:22:16 -39.8 Dark Down 53.5 190.0 Up 05:15:38 - 05:28:55 1316

The Dalles 05:22:18 -39.7 Dark Down 53.8 189.5 Up 05:15:39 - 05:28:56 1288

Maupin 05:22:16 -39.9 Dark Down 54.2 189.7 Up 05:15:38 - 05:28:55 1256

Niwot 05:20:36 -52.2 Dark Down 54.2 217.7 Up 05:13:58 - 05:27:15 1250

Madras/Culver 05:22:15 -40.1 Dark Down 54.7 189.8 Up 05:15:37 - 05:28:54 1208

Redmond 05:22:15 -40.3 Dark Down 55.1 189.8 Up 05:15:36 - 05:28:53 1177

Sisters 05:22:17 -40.0 Dark Down 55.1 189.1 Up 05:15:38 - 05:28:55 1169

Bend 05:22:15 -40.3 Dark Down 55.3 189.6 Up 05:15:36 - 05:28:53 1155

Oregon Observatory 05:22:15 -40.3 Dark Down 55.5 189.4 Up 05:15:37 - 05:28:54 1137

La Pine/Gilchrist 05:22:15 -40.3 Dark Down 55.7 189.4 Up 05:15:37 - 05:28:54 1118

North Lake 05:22:10 -40.9 Dark Down 56.0 190.5 Up 05:15:32 - 05:28:49 1095

Paisley 05:22:07 -41.4 Dark Down 56.5 191.2 Up 05:15:29 - 05:28:46 1057

Lakeview 05:22:05 -41.7 Dark Down 57.0 191.7 Up 05:15:27 - 05:28:44 1017

Chiloquin 05:22:14 -40.6 Dark Down 56.8 189.0 Up 05:15:36 - 05:28:53 1012

Klamath Falls 05:22:13 -40.7 Dark Down 57.2 189.2 Up 05:15:34 - 05:28:51 985

Tulelake 05:22:11 -41.1 Dark Down 57.4 189.8 Up 05:15:32 - 05:28:49 969

Cedarville 05:22:02 -42.1 Dark Down 57.6 192.2 Up 05:15:24 - 05:28:41 965

Fall River/Burney 05:22:08 -41.5 Dark Down 58.3 190.2 Up 05:15:30 - 05:28:47 890

Susanville 05:22:02 -42.2 Dark Down 58.8 191.7 Up 05:15:24 - 05:28:41 854

Gimple 05:22:03 -42.2 Dark Down 59.1 191.4 Up 05:15:24 - 05:28:41 823

Greenville 05:22:03 -42.1 Dark Down 59.1 191.3 Up 05:15:25 - 05:28:42 821

Portola 05:22:00 -42.6 Dark Down 59.3 192.3 Up 05:15:21 - 05:28:38 805

Quincy 05:22:02 -42.2 Dark Down 59.3 191.3 Up 05:15:24 - 05:28:41 803

Reno 05:21:55 -43.2 Dark Down 59.5 193.6 Up 05:15:17 - 05:28:34 798

Carson City 05:21:54 -43.3 Dark Down 59.8 193.7 Up 05:15:16 - 05:28:33 766

Yerington 05:21:50 -43.8 Dark Down 59.9 195.0 Up 05:15:12 - 05:28:29 766

Gardnerville 05:21:53 -43.4 Dark Down 60.1 193.9 Up 05:15:15 - 05:28:32 746

Hawthorne 05:21:46 -44.4 Dark Down 60.3 196.2 Up 05:15:07 - 05:28:24 738

Tonopah 05:21:37 -45.6 Dark Down 60.4 199.1 Up 05:14:58 - 05:28:15 735

Lee Vining 05:21:47 -44.3 Dark Down 60.9 195.6 Up 05:15:09 - 05:28:26 674

Indian Springs 05:21:23 -47.3 Dark Down 61.3 203.0 Up 05:14:45 - 05:28:02 644

Beatty 05:21:31 -46.4 Dark Down 61.3 200.7 Up 05:14:52 - 05:28:09 643

Bishop 05:21:41 -45.0 Dark Down 61.3 197.3 Up 05:15:03 - 05:28:20 640

Henderson 05:21:18 -48.0 Dark Down 61.6 204.7 Up 05:14:39 - 05:27:56 615

Patrick 05:21:09 -49.0 Dark Down 61.8 207.3 Up 05:14:31 - 05:27:48 590

DCO 05:21:04 -49.7 Dark Down 61.8 208.9 Up 05:14:25 - 05:27:42 583

Lone Pine 05:21:37 -45.6 Dark Down 62.0 198.3 Up 05:14:59 - 05:28:16 579

Searchlight/Boulder City 05:21:15 -48.3 Dark Down 62.1 205.2 Up 05:14:37 - 05:27:54 564

Kingman/Dolan Springs 05:21:10 -49.0 Dark Down 62.0 207.1 Up 05:14:31 - 05:27:48 564

Laughlin/Bullhead City 05:21:13 -48.6 Dark Down 62.3 206.1 Up 05:14:34 - 05:27:51 547

Mohave Valley 05:21:12 -48.8 Dark Down 62.5 206.4 Up 05:14:33 - 05:27:50 522

Lake Havasu City 05:21:09 -49.1 Dark Down 62.8 207.2 Up 05:14:31 - 05:27:48 493

Parker 05:21:08 -49.3 Dark Down 63.1 207.6 Up 05:14:29 - 05:27:46 461

Blythe 05:21:08 -49.2 Dark Down 63.7 207.4 Up 05:14:30 - 05:27:47 403

CPSLO 05:21:50 -44.1 Dark Down 63.8 193.6 Up 05:15:11 - 05:28:28 386

Idyllwild 05:21:22 -47.6 Dark Down 64.3 203.0 Up 05:14:43 - 05:28:00 352

Wildwood 05:21:34 -46.1 Dark Down 64.5 198.7 Up 05:14:55 - 05:28:12 331

Calipatria 05:21:12 -48.7 Dark Down 64.4 206.0 Up 05:14:34 - 05:27:51 330

Yuma 05:21:06 -49.6 Dark Down 64.5 208.2 Up 05:14:27 - 05:27:44 316

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 250112, (2020/02/18 05:25UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 12.65 165
Alhena         06:37:42.8 +16:23:57  1.9  6.98 167
16 Mon         06:46:32.4 +08:35:14  5.9  1.12 160
PPM 151177     06:45:13.8 +09:41:16  7.7  0.07 161
250112         06:45:30.6 +09:40:37  9.1       161
Positions are for J2000

Event circumstances last updated at 2018/06/12 19:54:10 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	05:22:19	-38.6	Dark	Down	49.7	191.2	Up	05:15:41 - 05:28:58	1646
Oroville	05:22:17	-39.0	Dark	Down	50.3	191.5	Up	05:15:38 - 05:28:55	1601
Tonasket	05:22:16	-39.1	Dark	Down	50.5	191.5	Up	05:15:38 - 05:28:55	1583
Okanogan	05:22:16	-39.2	Dark	Down	50.8	191.4	Up	05:15:38 - 05:28:55	1552
Brewster	05:22:16	-39.3	Dark	Down	51.1	191.1	Up	05:15:38 - 05:28:55	1526
Manson/Chelan	05:22:18	-39.2	Dark	Down	51.4	190.6	Up	05:15:39 - 05:28:56	1501
Entiat	05:22:18	-39.2	Dark	Down	51.6	190.5	Up	05:15:39 - 05:28:56	1481
Wenatchee	05:22:17	-39.3	Dark	Down	51.9	190.4	Up	05:15:39 - 05:28:56	1458
Ellensburg	05:22:18	-39.4	Dark	Down	52.3	190.2	Up	05:15:39 - 05:28:56	1419
Pasco	05:22:09	-40.6	Dark	Down	52.8	192.6	Up	05:15:30 - 05:28:47	1392
Yakima	05:22:16	-39.6	Dark	Down	52.7	190.3	Up	05:15:38 - 05:28:55	1386
PNWRO	05:22:07	-40.8	Dark	Down	53.0	193.0	Up	05:15:28 - 05:28:45	1377
Toppenish/White Swan	05:22:16	-39.8	Dark	Down	52.9	190.6	Up	05:15:37 - 05:28:54	1372
George/Umatilla	05:22:09	-40.6	Dark	Down	53.2	192.4	Up	05:15:31 - 05:28:48	1359
Goldendale	05:22:16	-39.8	Dark	Down	53.5	190.0	Up	05:15:38 - 05:28:55	1316
The Dalles	05:22:18	-39.7	Dark	Down	53.8	189.5	Up	05:15:39 - 05:28:56	1288
Maupin	05:22:16	-39.9	Dark	Down	54.2	189.7	Up	05:15:38 - 05:28:55	1256
Niwot	05:20:36	-52.2	Dark	Down	54.2	217.7	Up	05:13:58 - 05:27:15	1250
Madras/Culver	05:22:15	-40.1	Dark	Down	54.7	189.8	Up	05:15:37 - 05:28:54	1208
Redmond	05:22:15	-40.3	Dark	Down	55.1	189.8	Up	05:15:36 - 05:28:53	1177
Sisters	05:22:17	-40.0	Dark	Down	55.1	189.1	Up	05:15:38 - 05:28:55	1169
Bend	05:22:15	-40.3	Dark	Down	55.3	189.6	Up	05:15:36 - 05:28:53	1155
Oregon Observatory	05:22:15	-40.3	Dark	Down	55.5	189.4	Up	05:15:37 - 05:28:54	1137
La Pine/Gilchrist	05:22:15	-40.3	Dark	Down	55.7	189.4	Up	05:15:37 - 05:28:54	1118
North Lake	05:22:10	-40.9	Dark	Down	56.0	190.5	Up	05:15:32 - 05:28:49	1095
Paisley	05:22:07	-41.4	Dark	Down	56.5	191.2	Up	05:15:29 - 05:28:46	1057
Lakeview	05:22:05	-41.7	Dark	Down	57.0	191.7	Up	05:15:27 - 05:28:44	1017
Chiloquin	05:22:14	-40.6	Dark	Down	56.8	189.0	Up	05:15:36 - 05:28:53	1012
Klamath Falls	05:22:13	-40.7	Dark	Down	57.2	189.2	Up	05:15:34 - 05:28:51	985
Tulelake	05:22:11	-41.1	Dark	Down	57.4	189.8	Up	05:15:32 - 05:28:49	969
Cedarville	05:22:02	-42.1	Dark	Down	57.6	192.2	Up	05:15:24 - 05:28:41	965
Fall River/Burney	05:22:08	-41.5	Dark	Down	58.3	190.2	Up	05:15:30 - 05:28:47	890
Susanville	05:22:02	-42.2	Dark	Down	58.8	191.7	Up	05:15:24 - 05:28:41	854
Gimple	05:22:03	-42.2	Dark	Down	59.1	191.4	Up	05:15:24 - 05:28:41	823
Greenville	05:22:03	-42.1	Dark	Down	59.1	191.3	Up	05:15:25 - 05:28:42	821
Portola	05:22:00	-42.6	Dark	Down	59.3	192.3	Up	05:15:21 - 05:28:38	805
Quincy	05:22:02	-42.2	Dark	Down	59.3	191.3	Up	05:15:24 - 05:28:41	803
Reno	05:21:55	-43.2	Dark	Down	59.5	193.6	Up	05:15:17 - 05:28:34	798
Carson City	05:21:54	-43.3	Dark	Down	59.8	193.7	Up	05:15:16 - 05:28:33	766
Yerington	05:21:50	-43.8	Dark	Down	59.9	195.0	Up	05:15:12 - 05:28:29	766
Gardnerville	05:21:53	-43.4	Dark	Down	60.1	193.9	Up	05:15:15 - 05:28:32	746
Hawthorne	05:21:46	-44.4	Dark	Down	60.3	196.2	Up	05:15:07 - 05:28:24	738
Tonopah	05:21:37	-45.6	Dark	Down	60.4	199.1	Up	05:14:58 - 05:28:15	735
Lee Vining	05:21:47	-44.3	Dark	Down	60.9	195.6	Up	05:15:09 - 05:28:26	674
Indian Springs	05:21:23	-47.3	Dark	Down	61.3	203.0	Up	05:14:45 - 05:28:02	644
Beatty	05:21:31	-46.4	Dark	Down	61.3	200.7	Up	05:14:52 - 05:28:09	643
Bishop	05:21:41	-45.0	Dark	Down	61.3	197.3	Up	05:15:03 - 05:28:20	640
Henderson	05:21:18	-48.0	Dark	Down	61.6	204.7	Up	05:14:39 - 05:27:56	615
Patrick	05:21:09	-49.0	Dark	Down	61.8	207.3	Up	05:14:31 - 05:27:48	590
DCO	05:21:04	-49.7	Dark	Down	61.8	208.9	Up	05:14:25 - 05:27:42	583
Lone Pine	05:21:37	-45.6	Dark	Down	62.0	198.3	Up	05:14:59 - 05:28:16	579
Searchlight/Boulder City	05:21:15	-48.3	Dark	Down	62.1	205.2	Up	05:14:37 - 05:27:54	564
Kingman/Dolan Springs	05:21:10	-49.0	Dark	Down	62.0	207.1	Up	05:14:31 - 05:27:48	564
Laughlin/Bullhead City	05:21:13	-48.6	Dark	Down	62.3	206.1	Up	05:14:34 - 05:27:51	547
Mohave Valley	05:21:12	-48.8	Dark	Down	62.5	206.4	Up	05:14:33 - 05:27:50	522
Lake Havasu City	05:21:09	-49.1	Dark	Down	62.8	207.2	Up	05:14:31 - 05:27:48	493
Parker	05:21:08	-49.3	Dark	Down	63.1	207.6	Up	05:14:29 - 05:27:46	461
Blythe	05:21:08	-49.2	Dark	Down	63.7	207.4	Up	05:14:30 - 05:27:47	403
CPSLO	05:21:50	-44.1	Dark	Down	63.8	193.6	Up	05:15:11 - 05:28:28	386
Idyllwild	05:21:22	-47.6	Dark	Down	64.3	203.0	Up	05:14:43 - 05:28:00	352
Wildwood	05:21:34	-46.1	Dark	Down	64.5	198.7	Up	05:14:55 - 05:28:12	331
Calipatria	05:21:12	-48.7	Dark	Down	64.4	206.0	Up	05:14:34 - 05:27:51	330
Yuma	05:21:06	-49.6	Dark	Down	64.5	208.2	Up	05:14:27 - 05:27:44	316