RECON: TNO occultation with 250112

Event between (250112) 02KY14 and star GA0980:02216366 with event index number of 356297

Geocentric closest approach at 2020/02/18 05:21:57 UTC

J2000 position of star is 06:45:30.6 +09:40:37
Equinox of date position of star is 06:46:36.8 +09:39:17
Stellar brightness G=9.1, use SENSEUP=2
Star is 161 degrees from the moon. Moon is 27% 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 93 seconds.
The 1-sigma cross-track error in the shadow position is 806 km.
The sky-plane scale is 9329.4 km/arcsec.

The TNO has an absolute magnitude Hv=9.7
Diameter=72.4 km assuming a 5% albedo -- 5.0 sec chord
Diameter=29.6 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR

Star training set for 250112, (2020/02/18 05:22UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:15.7 +07:24:33  0.4 12.65 165
Alhena         06:38:52.5 +16:22:49  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 19.7 km RECON observability=1.0 and success probability=32.0%

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

Clarence Fulton 05:22:51 -38.5 Dark Down 48.9 191.6 Up 05:14:36 - 05:31:06 1724

Peachland 05:22:51 -38.5 Dark Down 49.5 191.0 Up 05:14:36 - 05:31:06 1675

Summerland 05:22:50 -38.6 Dark Down 49.6 191.2 Up 05:14:35 - 05:31:05 1666

Penticton 05:22:50 -38.7 Dark Down 49.7 191.4 Up 05:14:35 - 05:31:05 1663

Oliver 05:22:49 -38.9 Dark Down 50.0 191.4 Up 05:14:34 - 05:31:04 1635

Anarchist Mountain Observatory 05:22:47 -39.1 Dark Down 50.2 191.8 Up 05:14:32 - 05:31:02 1627

Tonasket 05:22:48 -39.2 Dark Down 50.5 191.7 Up 05:14:33 - 05:31:03 1600

Okanogan 05:22:47 -39.3 Dark Down 50.8 191.6 Up 05:14:32 - 05:31:02 1570

Brewster 05:22:47 -39.3 Dark Down 51.1 191.3 Up 05:14:32 - 05:31:02 1544

Manson/Chelan 05:22:49 -39.2 Dark Down 51.4 190.8 Up 05:14:34 - 05:31:04 1518

Entiat 05:22:49 -39.3 Dark Down 51.6 190.8 Up 05:14:34 - 05:31:04 1499

Victoria 05:23:06 -37.1 Dark Down 51.0 185.7 Up 05:14:51 - 05:31:21 1495

Wenatchee 05:22:48 -39.4 Dark Down 51.8 190.7 Up 05:14:33 - 05:31:03 1476

Ellensburg 05:22:48 -39.4 Dark Down 52.3 190.4 Up 05:14:33 - 05:31:03 1437

Pasco 05:22:39 -40.6 Dark Down 52.8 192.8 Up 05:14:24 - 05:30:54 1410

Yakima 05:22:48 -39.6 Dark Down 52.7 190.5 Up 05:14:33 - 05:31:03 1403

PNWRO 05:22:38 -40.9 Dark Down 53.0 193.3 Up 05:14:23 - 05:30:53 1395

Toppenish/White Swan 05:22:47 -39.8 Dark Down 52.9 190.8 Up 05:14:32 - 05:31:02 1389

Goldendale 05:22:47 -39.9 Dark Down 53.5 190.2 Up 05:14:32 - 05:31:02 1333

The Dalles 05:22:49 -39.7 Dark Down 53.7 189.7 Up 05:14:34 - 05:31:04 1306

Maupin 05:22:47 -40.0 Dark Down 54.1 189.9 Up 05:14:32 - 05:31:02 1273

Niwot 05:21:07 -52.2 Dark Down 54.1 217.8 Up 05:12:52 - 05:29:22 1270

SwRI 05:21:07 -52.3 Dark Down 54.3 217.8 Up 05:12:52 - 05:29:22 1258

Redmond 05:22:45 -40.3 Dark Down 55.0 190.0 Up 05:14:30 - 05:31:00 1195

Sisters 05:22:47 -40.1 Dark Down 55.1 189.3 Up 05:14:32 - 05:31:02 1187

Bend 05:22:45 -40.3 Dark Down 55.3 189.8 Up 05:14:30 - 05:31:00 1173

Oregon Observatory 05:22:46 -40.3 Dark Down 55.5 189.6 Up 05:14:31 - 05:31:01 1155

La Pine/Gilchrist 05:22:46 -40.4 Dark Down 55.7 189.6 Up 05:14:31 - 05:31:01 1136

North Lake 05:22:41 -41.0 Dark Down 56.0 190.7 Up 05:14:26 - 05:30:56 1114

Paisley 05:22:38 -41.4 Dark Down 56.5 191.5 Up 05:14:23 - 05:30:53 1075

Lakeview 05:22:36 -41.8 Dark Down 57.0 192.0 Up 05:14:21 - 05:30:51 1036

Klamath Falls 05:22:44 -40.8 Dark Down 57.1 189.4 Up 05:14:29 - 05:30:59 1003

Cedarville 05:22:33 -42.2 Dark Down 57.6 192.5 Up 05:14:18 - 05:30:48 983

Fall River/Burney 05:22:39 -41.6 Dark Down 58.3 190.4 Up 05:14:24 - 05:30:54 909

Susanville 05:22:33 -42.3 Dark Down 58.8 192.0 Up 05:14:18 - 05:30:48 872

Gimple 05:22:33 -42.3 Dark Down 59.1 191.7 Up 05:14:18 - 05:30:48 842

Greenville 05:22:34 -42.2 Dark Down 59.1 191.5 Up 05:14:19 - 05:30:49 840

Portola 05:22:30 -42.7 Dark Down 59.3 192.5 Up 05:14:15 - 05:30:45 823

Quincy 05:22:33 -42.3 Dark Down 59.3 191.6 Up 05:14:18 - 05:30:48 822

Reno 05:22:26 -43.2 Dark Down 59.5 193.8 Up 05:14:11 - 05:30:41 817

Carson City 05:22:25 -43.4 Dark Down 59.8 194.0 Up 05:14:10 - 05:30:40 785

Yerington 05:22:21 -43.9 Dark Down 59.9 195.3 Up 05:14:06 - 05:30:36 784

Gardnerville 05:22:24 -43.5 Dark Down 60.0 194.2 Up 05:14:09 - 05:30:39 764

Hawthorne 05:22:17 -44.5 Dark Down 60.2 196.5 Up 05:14:02 - 05:30:32 757

Tonopah 05:22:07 -45.7 Dark Down 60.3 199.4 Up 05:13:52 - 05:30:22 754

Lee Vining 05:22:18 -44.4 Dark Down 60.9 195.8 Up 05:14:03 - 05:30:33 693

Indian Springs 05:21:54 -47.4 Dark Down 61.3 203.2 Up 05:13:39 - 05:30:09 662

Beatty 05:22:01 -46.5 Dark Down 61.3 200.9 Up 05:13:46 - 05:30:16 662

Bishop 05:22:12 -45.1 Dark Down 61.3 197.5 Up 05:13:57 - 05:30:27 658

Henderson 05:21:48 -48.1 Dark Down 61.6 204.9 Up 05:13:33 - 05:30:03 633

Patrick 05:21:40 -49.1 Dark Down 61.7 207.5 Up 05:13:25 - 05:29:55 609

DCO 05:21:35 -49.8 Dark Down 61.7 209.1 Up 05:13:20 - 05:29:50 602

Searchlight/Boulder City 05:21:46 -48.4 Dark Down 62.1 205.5 Up 05:13:31 - 05:30:01 583

Kingman/Dolan Springs 05:21:40 -49.1 Dark Down 62.0 207.4 Up 05:13:25 - 05:29:55 583

Laughlin/Bullhead City 05:21:43 -48.7 Dark Down 62.2 206.4 Up 05:13:28 - 05:29:58 565

Mohave Valley 05:21:42 -48.9 Dark Down 62.5 206.6 Up 05:13:27 - 05:29:57 540

George/Scottsdale 05:21:23 -51.3 Dark Down 62.4 212.8 Up 05:13:08 - 05:29:38 513

Lake Havasu City 05:21:40 -49.2 Dark Down 62.7 207.4 Up 05:13:25 - 05:29:55 511

Parker 05:21:39 -49.4 Dark Down 63.0 207.8 Up 05:13:24 - 05:29:54 479

Blythe 05:21:39 -49.3 Dark Down 63.6 207.7 Up 05:13:24 - 05:29:54 422

CPSLO 05:22:20 -44.2 Dark Down 63.8 193.9 Up 05:14:05 - 05:30:35 404

Idyllwild 05:21:52 -47.7 Dark Down 64.2 203.3 Up 05:13:37 - 05:30:07 371

Wildwood 05:22:05 -46.2 Dark Down 64.5 199.0 Up 05:13:50 - 05:30:20 349

Calipatria 05:21:43 -48.8 Dark Down 64.4 206.2 Up 05:13:28 - 05:29:58 348

Yuma 05:21:36 -49.7 Dark Down 64.4 208.5 Up 05:13:21 - 05:29:51 334

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 05:22UT)
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 2020/02/04 22:07:39 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)
Clarence Fulton	05:22:51	-38.5	Dark	Down	48.9	191.6	Up	05:14:36 - 05:31:06	1724
Peachland	05:22:51	-38.5	Dark	Down	49.5	191.0	Up	05:14:36 - 05:31:06	1675
Summerland	05:22:50	-38.6	Dark	Down	49.6	191.2	Up	05:14:35 - 05:31:05	1666
Penticton	05:22:50	-38.7	Dark	Down	49.7	191.4	Up	05:14:35 - 05:31:05	1663
Oliver	05:22:49	-38.9	Dark	Down	50.0	191.4	Up	05:14:34 - 05:31:04	1635
Anarchist Mountain Observatory	05:22:47	-39.1	Dark	Down	50.2	191.8	Up	05:14:32 - 05:31:02	1627
Tonasket	05:22:48	-39.2	Dark	Down	50.5	191.7	Up	05:14:33 - 05:31:03	1600
Okanogan	05:22:47	-39.3	Dark	Down	50.8	191.6	Up	05:14:32 - 05:31:02	1570
Brewster	05:22:47	-39.3	Dark	Down	51.1	191.3	Up	05:14:32 - 05:31:02	1544
Manson/Chelan	05:22:49	-39.2	Dark	Down	51.4	190.8	Up	05:14:34 - 05:31:04	1518
Entiat	05:22:49	-39.3	Dark	Down	51.6	190.8	Up	05:14:34 - 05:31:04	1499
Victoria	05:23:06	-37.1	Dark	Down	51.0	185.7	Up	05:14:51 - 05:31:21	1495
Wenatchee	05:22:48	-39.4	Dark	Down	51.8	190.7	Up	05:14:33 - 05:31:03	1476
Ellensburg	05:22:48	-39.4	Dark	Down	52.3	190.4	Up	05:14:33 - 05:31:03	1437
Pasco	05:22:39	-40.6	Dark	Down	52.8	192.8	Up	05:14:24 - 05:30:54	1410
Yakima	05:22:48	-39.6	Dark	Down	52.7	190.5	Up	05:14:33 - 05:31:03	1403
PNWRO	05:22:38	-40.9	Dark	Down	53.0	193.3	Up	05:14:23 - 05:30:53	1395
Toppenish/White Swan	05:22:47	-39.8	Dark	Down	52.9	190.8	Up	05:14:32 - 05:31:02	1389
Goldendale	05:22:47	-39.9	Dark	Down	53.5	190.2	Up	05:14:32 - 05:31:02	1333
The Dalles	05:22:49	-39.7	Dark	Down	53.7	189.7	Up	05:14:34 - 05:31:04	1306
Maupin	05:22:47	-40.0	Dark	Down	54.1	189.9	Up	05:14:32 - 05:31:02	1273
Niwot	05:21:07	-52.2	Dark	Down	54.1	217.8	Up	05:12:52 - 05:29:22	1270
SwRI	05:21:07	-52.3	Dark	Down	54.3	217.8	Up	05:12:52 - 05:29:22	1258
Redmond	05:22:45	-40.3	Dark	Down	55.0	190.0	Up	05:14:30 - 05:31:00	1195
Sisters	05:22:47	-40.1	Dark	Down	55.1	189.3	Up	05:14:32 - 05:31:02	1187
Bend	05:22:45	-40.3	Dark	Down	55.3	189.8	Up	05:14:30 - 05:31:00	1173
Oregon Observatory	05:22:46	-40.3	Dark	Down	55.5	189.6	Up	05:14:31 - 05:31:01	1155
La Pine/Gilchrist	05:22:46	-40.4	Dark	Down	55.7	189.6	Up	05:14:31 - 05:31:01	1136
North Lake	05:22:41	-41.0	Dark	Down	56.0	190.7	Up	05:14:26 - 05:30:56	1114
Paisley	05:22:38	-41.4	Dark	Down	56.5	191.5	Up	05:14:23 - 05:30:53	1075
Lakeview	05:22:36	-41.8	Dark	Down	57.0	192.0	Up	05:14:21 - 05:30:51	1036
Klamath Falls	05:22:44	-40.8	Dark	Down	57.1	189.4	Up	05:14:29 - 05:30:59	1003
Cedarville	05:22:33	-42.2	Dark	Down	57.6	192.5	Up	05:14:18 - 05:30:48	983
Fall River/Burney	05:22:39	-41.6	Dark	Down	58.3	190.4	Up	05:14:24 - 05:30:54	909
Susanville	05:22:33	-42.3	Dark	Down	58.8	192.0	Up	05:14:18 - 05:30:48	872
Gimple	05:22:33	-42.3	Dark	Down	59.1	191.7	Up	05:14:18 - 05:30:48	842
Greenville	05:22:34	-42.2	Dark	Down	59.1	191.5	Up	05:14:19 - 05:30:49	840
Portola	05:22:30	-42.7	Dark	Down	59.3	192.5	Up	05:14:15 - 05:30:45	823
Quincy	05:22:33	-42.3	Dark	Down	59.3	191.6	Up	05:14:18 - 05:30:48	822
Reno	05:22:26	-43.2	Dark	Down	59.5	193.8	Up	05:14:11 - 05:30:41	817
Carson City	05:22:25	-43.4	Dark	Down	59.8	194.0	Up	05:14:10 - 05:30:40	785
Yerington	05:22:21	-43.9	Dark	Down	59.9	195.3	Up	05:14:06 - 05:30:36	784
Gardnerville	05:22:24	-43.5	Dark	Down	60.0	194.2	Up	05:14:09 - 05:30:39	764
Hawthorne	05:22:17	-44.5	Dark	Down	60.2	196.5	Up	05:14:02 - 05:30:32	757
Tonopah	05:22:07	-45.7	Dark	Down	60.3	199.4	Up	05:13:52 - 05:30:22	754
Lee Vining	05:22:18	-44.4	Dark	Down	60.9	195.8	Up	05:14:03 - 05:30:33	693
Indian Springs	05:21:54	-47.4	Dark	Down	61.3	203.2	Up	05:13:39 - 05:30:09	662
Beatty	05:22:01	-46.5	Dark	Down	61.3	200.9	Up	05:13:46 - 05:30:16	662
Bishop	05:22:12	-45.1	Dark	Down	61.3	197.5	Up	05:13:57 - 05:30:27	658
Henderson	05:21:48	-48.1	Dark	Down	61.6	204.9	Up	05:13:33 - 05:30:03	633
Patrick	05:21:40	-49.1	Dark	Down	61.7	207.5	Up	05:13:25 - 05:29:55	609
DCO	05:21:35	-49.8	Dark	Down	61.7	209.1	Up	05:13:20 - 05:29:50	602
Searchlight/Boulder City	05:21:46	-48.4	Dark	Down	62.1	205.5	Up	05:13:31 - 05:30:01	583
Kingman/Dolan Springs	05:21:40	-49.1	Dark	Down	62.0	207.4	Up	05:13:25 - 05:29:55	583
Laughlin/Bullhead City	05:21:43	-48.7	Dark	Down	62.2	206.4	Up	05:13:28 - 05:29:58	565
Mohave Valley	05:21:42	-48.9	Dark	Down	62.5	206.6	Up	05:13:27 - 05:29:57	540
George/Scottsdale	05:21:23	-51.3	Dark	Down	62.4	212.8	Up	05:13:08 - 05:29:38	513
Lake Havasu City	05:21:40	-49.2	Dark	Down	62.7	207.4	Up	05:13:25 - 05:29:55	511
Parker	05:21:39	-49.4	Dark	Down	63.0	207.8	Up	05:13:24 - 05:29:54	479
Blythe	05:21:39	-49.3	Dark	Down	63.6	207.7	Up	05:13:24 - 05:29:54	422
CPSLO	05:22:20	-44.2	Dark	Down	63.8	193.9	Up	05:14:05 - 05:30:35	404
Idyllwild	05:21:52	-47.7	Dark	Down	64.2	203.3	Up	05:13:37 - 05:30:07	371
Wildwood	05:22:05	-46.2	Dark	Down	64.5	199.0	Up	05:13:50 - 05:30:20	349
Calipatria	05:21:43	-48.8	Dark	Down	64.4	206.2	Up	05:13:28 - 05:29:58	348
Yuma	05:21:36	-49.7	Dark	Down	64.4	208.5	Up	05:13:21 - 05:29:51	334