RECON: TNO occultation with 55638

Event between (55638) 02VE95 and star GA0940:02621464 with event index number of 1658424

Geocentric closest approach at 2027/01/10 05:25:38 UTC

J2000 position of star is 07:18:39.8 +05:12:59
Equinox of date position of star is 07:19:45.5 +05:10:39
Stellar brightness G=15.8, use SENSEUP=128
Star is 150 degrees from the moon. Moon is 5% illuminated.
TNO apparent brightness V=25.0

[RECON map]
TNO is 32.0 AU from the Sun and 31.0 AU from the Earth.
The TNO is moving 24.7 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 158 seconds.
The 1-sigma cross-track error in the shadow position is 1515 km.
The sky-plane scale is 22492.3 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=524.8 km assuming a 5% albedo -- 2.4 sec chord
Diameter=214.3 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is 3:2E

Star training set for 55638, (2027/01/10 05:26UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:38.1 +07:24:35  0.4 20.86 131
Alhena         06:39:16.4 +16:22:26  1.9 15.03 143
PPM 152316     07:18:44.8 +06:37:51  6.4  1.50 150
PPM 152294     07:18:08.7 +05:18:39  8.4  0.51 150
PPM 152381     07:20:43.4 +05:13:49  8.9  0.17 150
55638          07:20:06.0 +05:09:55 15.8       150
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 22.4 km RECON observability=1.0 and success probability=26.2%

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 05:27:44 -48.4 Dark Down 35.1 132.2 Up 05:14:05 - 05:41:23 -219

Kelowna 05:27:45 -48.5 Dark Down 35.3 131.8 Up 05:14:06 - 05:41:24 -252

Peachland 05:27:46 -48.3 Dark Down 35.2 131.4 Up 05:14:07 - 05:41:25 -262

Summerland 05:27:46 -48.5 Dark Down 35.4 131.4 Up 05:14:07 - 05:41:25 -274

Penticton 05:27:46 -48.6 Dark Down 35.5 131.5 Up 05:14:07 - 05:41:25 -280

Oliver 05:27:47 -48.7 Dark Down 35.7 131.3 Up 05:14:08 - 05:41:26 -309

Anarchist Mountain Observatory 05:27:46 -48.9 Dark Down 35.9 131.4 Up 05:14:07 - 05:41:25 -323

Tonasket 05:27:47 -49.0 Dark Down 36.1 131.2 Up 05:14:08 - 05:41:26 -350

Victoria 05:27:56 -46.7 Dark Down 34.2 127.0 Up 05:14:17 - 05:41:35 -379

Okanogan 05:27:48 -49.1 Dark Down 36.2 130.9 Up 05:14:09 - 05:41:27 -379

Brewster 05:27:49 -49.1 Dark Down 36.3 130.5 Up 05:14:10 - 05:41:28 -403

Manson/Chelan 05:27:50 -48.9 Dark Down 36.2 130.0 Up 05:14:11 - 05:41:29 -423

Entiat 05:27:51 -49.0 Dark Down 36.3 129.8 Up 05:14:12 - 05:41:30 -442

Wenatchee 05:27:51 -49.0 Dark Down 36.5 129.6 Up 05:14:12 - 05:41:30 -464

Ellensburg 05:27:52 -49.1 Dark Down 36.6 129.1 Up 05:14:13 - 05:41:31 -501

Yakima 05:27:53 -49.2 Dark Down 36.9 128.8 Up 05:14:14 - 05:41:32 -537

Toppenish/White Swan 05:27:53 -49.4 Dark Down 37.1 128.9 Up 05:14:14 - 05:41:32 -555

Pasco 05:27:50 -50.2 Dark Down 37.8 130.2 Up 05:14:11 - 05:41:29 -561

PNWRO 05:27:50 -50.5 Dark Down 38.1 130.3 Up 05:14:11 - 05:41:29 -582

Goldendale 05:27:55 -49.3 Dark Down 37.2 128.1 Up 05:14:16 - 05:41:34 -606

The Dalles 05:27:56 -49.2 Dark Down 37.1 127.6 Up 05:14:17 - 05:41:35 -627

Maupin 05:27:57 -49.4 Dark Down 37.5 127.5 Up 05:14:18 - 05:41:36 -664

Sisters 05:27:59 -49.4 Dark Down 37.7 126.4 Up 05:14:20 - 05:41:38 -745

Redmond 05:27:58 -49.7 Dark Down 38.0 126.8 Up 05:14:19 - 05:41:37 -746

Bend 05:27:59 -49.7 Dark Down 38.0 126.6 Up 05:14:20 - 05:41:38 -765

Oregon Observatory 05:27:59 -49.6 Dark Down 38.0 126.3 Up 05:14:20 - 05:41:38 -782

La Pine/Gilchrist 05:28:00 -49.6 Dark Down 38.1 126.1 Up 05:14:21 - 05:41:39 -800

North Lake 05:27:59 -50.2 Dark Down 38.7 126.5 Up 05:14:20 - 05:41:38 -838

Paisley 05:27:59 -50.6 Dark Down 39.3 126.5 Up 05:14:20 - 05:41:38 -887

Lakeview 05:27:59 -50.9 Dark Down 39.7 126.3 Up 05:14:20 - 05:41:38 -933

Klamath Falls 05:28:03 -49.9 Dark Down 38.8 124.9 Up 05:14:24 - 05:41:42 -935

Cedarville 05:27:59 -51.3 Dark Down 40.2 126.1 Up 05:14:20 - 05:41:38 -994

Niwot 05:27:18 -62.0 Dark Down 49.2 142.6 Up 05:13:39 - 05:40:57 -1039

Fall River/Burney 05:28:03 -50.5 Dark Down 39.7 124.5 Up 05:14:24 - 05:41:42 -1044

SwRI 05:27:18 -62.0 Dark Down 49.2 142.4 Up 05:13:39 - 05:40:57 -1050

Susanville 05:28:02 -51.2 Dark Down 40.5 124.8 Up 05:14:23 - 05:41:41 -1100

Gimple 05:28:03 -51.2 Dark Down 40.6 124.4 Up 05:14:24 - 05:41:42 -1128

Greenville 05:28:03 -51.1 Dark Down 40.5 124.3 Up 05:14:24 - 05:41:42 -1128

Quincy 05:28:04 -51.2 Dark Down 40.6 124.2 Up 05:14:25 - 05:41:43 -1147

Portola 05:28:03 -51.5 Dark Down 41.0 124.6 Up 05:14:24 - 05:41:42 -1157

Reno 05:28:01 -52.1 Dark Down 41.6 125.1 Up 05:14:22 - 05:41:40 -1180

Carson City 05:28:02 -52.2 Dark Down 41.8 124.8 Up 05:14:23 - 05:41:41 -1214

Yerington 05:28:00 -52.7 Dark Down 42.3 125.3 Up 05:14:21 - 05:41:39 -1230

Gardnerville 05:28:02 -52.3 Dark Down 41.9 124.7 Up 05:14:23 - 05:41:41 -1237

Hawthorne 05:27:59 -53.2 Dark Down 42.9 125.5 Up 05:14:20 - 05:41:38 -1272

Tonopah 05:27:56 -54.4 Dark Down 44.1 126.6 Up 05:14:17 - 05:41:35 -1310

Lee Vining 05:28:01 -53.0 Dark Down 42.9 124.6 Up 05:14:22 - 05:41:40 -1328

Bishop 05:28:00 -53.7 Dark Down 43.7 124.9 Up 05:14:21 - 05:41:39 -1383

Beatty 05:27:56 -55.1 Dark Down 45.0 126.2 Up 05:14:17 - 05:41:35 -1420

Indian Springs 05:27:53 -56.0 Dark Down 45.9 127.1 Up 05:14:14 - 05:41:32 -1446

Henderson 05:27:51 -56.7 Dark Down 46.7 127.4 Up 05:14:12 - 05:41:30 -1495

Patrick 05:27:48 -57.7 Dark Down 47.8 128.1 Up 05:14:09 - 05:41:27 -1550

Searchlight/Boulder City 05:27:51 -56.9 Dark Down 47.1 127.0 Up 05:14:12 - 05:41:30 -1551

Kingman/Dolan Springs 05:27:49 -57.6 Dark Down 47.8 127.7 Up 05:14:10 - 05:41:28 -1573

DCO 05:27:46 -58.3 Dark Down 48.4 128.7 Up 05:14:07 - 05:41:25 -1576

Laughlin/Bullhead City 05:27:51 -57.2 Dark Down 47.5 127.1 Up 05:14:12 - 05:41:30 -1579

CPSLO 05:28:08 -52.4 Dark Down 43.3 121.0 Up 05:14:29 - 05:41:47 -1597

Mohave Valley 05:27:51 -57.3 Dark Down 47.6 126.9 Up 05:14:12 - 05:41:30 -1606

Lake Havasu City 05:27:51 -57.6 Dark Down 48.0 126.8 Up 05:14:12 - 05:41:30 -1644

Parker 05:27:51 -57.7 Dark Down 48.3 126.5 Up 05:14:12 - 05:41:30 -1679

George/Scottsdale 05:27:43 -59.7 Dark Down 50.1 128.9 Up 05:14:04 - 05:41:22 -1706

Wildwood 05:28:04 -54.2 Dark Down 45.4 122.0 Up 05:14:25 - 05:41:43 -1708

Idyllwild 05:27:59 -55.8 Dark Down 46.9 123.6 Up 05:14:20 - 05:41:38 -1733

Blythe 05:27:52 -57.6 Dark Down 48.4 125.7 Up 05:14:13 - 05:41:31 -1733

Calipatria 05:27:56 -56.9 Dark Down 48.0 124.3 Up 05:14:17 - 05:41:35 -1789

Yuma 05:27:53 -57.7 Dark Down 48.9 124.8 Up 05:14:14 - 05:41:32 -1827

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 55638, (2027/01/10 05:26UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 20.86 131
Alhena         06:37:42.8 +16:23:57  1.9 15.03 143
PPM 152316     07:17:17.8 +06:40:52  6.4  1.50 150
PPM 152294     07:16:42.4 +05:21:39  8.4  0.51 150
PPM 152381     07:19:17.2 +05:16:55  8.9  0.17 150
55638          07:18:39.8 +05:12:59 15.8       150
Positions are for J2000

Event circumstances last updated at 2020/08/12 23:17:27 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	05:27:44	-48.4	Dark	Down	35.1	132.2	Up	05:14:05 - 05:41:23	-219
Kelowna	05:27:45	-48.5	Dark	Down	35.3	131.8	Up	05:14:06 - 05:41:24	-252
Peachland	05:27:46	-48.3	Dark	Down	35.2	131.4	Up	05:14:07 - 05:41:25	-262
Summerland	05:27:46	-48.5	Dark	Down	35.4	131.4	Up	05:14:07 - 05:41:25	-274
Penticton	05:27:46	-48.6	Dark	Down	35.5	131.5	Up	05:14:07 - 05:41:25	-280
Oliver	05:27:47	-48.7	Dark	Down	35.7	131.3	Up	05:14:08 - 05:41:26	-309
Anarchist Mountain Observatory	05:27:46	-48.9	Dark	Down	35.9	131.4	Up	05:14:07 - 05:41:25	-323
Tonasket	05:27:47	-49.0	Dark	Down	36.1	131.2	Up	05:14:08 - 05:41:26	-350
Victoria	05:27:56	-46.7	Dark	Down	34.2	127.0	Up	05:14:17 - 05:41:35	-379
Okanogan	05:27:48	-49.1	Dark	Down	36.2	130.9	Up	05:14:09 - 05:41:27	-379
Brewster	05:27:49	-49.1	Dark	Down	36.3	130.5	Up	05:14:10 - 05:41:28	-403
Manson/Chelan	05:27:50	-48.9	Dark	Down	36.2	130.0	Up	05:14:11 - 05:41:29	-423
Entiat	05:27:51	-49.0	Dark	Down	36.3	129.8	Up	05:14:12 - 05:41:30	-442
Wenatchee	05:27:51	-49.0	Dark	Down	36.5	129.6	Up	05:14:12 - 05:41:30	-464
Ellensburg	05:27:52	-49.1	Dark	Down	36.6	129.1	Up	05:14:13 - 05:41:31	-501
Yakima	05:27:53	-49.2	Dark	Down	36.9	128.8	Up	05:14:14 - 05:41:32	-537
Toppenish/White Swan	05:27:53	-49.4	Dark	Down	37.1	128.9	Up	05:14:14 - 05:41:32	-555
Pasco	05:27:50	-50.2	Dark	Down	37.8	130.2	Up	05:14:11 - 05:41:29	-561
PNWRO	05:27:50	-50.5	Dark	Down	38.1	130.3	Up	05:14:11 - 05:41:29	-582
Goldendale	05:27:55	-49.3	Dark	Down	37.2	128.1	Up	05:14:16 - 05:41:34	-606
The Dalles	05:27:56	-49.2	Dark	Down	37.1	127.6	Up	05:14:17 - 05:41:35	-627
Maupin	05:27:57	-49.4	Dark	Down	37.5	127.5	Up	05:14:18 - 05:41:36	-664
Sisters	05:27:59	-49.4	Dark	Down	37.7	126.4	Up	05:14:20 - 05:41:38	-745
Redmond	05:27:58	-49.7	Dark	Down	38.0	126.8	Up	05:14:19 - 05:41:37	-746
Bend	05:27:59	-49.7	Dark	Down	38.0	126.6	Up	05:14:20 - 05:41:38	-765
Oregon Observatory	05:27:59	-49.6	Dark	Down	38.0	126.3	Up	05:14:20 - 05:41:38	-782
La Pine/Gilchrist	05:28:00	-49.6	Dark	Down	38.1	126.1	Up	05:14:21 - 05:41:39	-800
North Lake	05:27:59	-50.2	Dark	Down	38.7	126.5	Up	05:14:20 - 05:41:38	-838
Paisley	05:27:59	-50.6	Dark	Down	39.3	126.5	Up	05:14:20 - 05:41:38	-887
Lakeview	05:27:59	-50.9	Dark	Down	39.7	126.3	Up	05:14:20 - 05:41:38	-933
Klamath Falls	05:28:03	-49.9	Dark	Down	38.8	124.9	Up	05:14:24 - 05:41:42	-935
Cedarville	05:27:59	-51.3	Dark	Down	40.2	126.1	Up	05:14:20 - 05:41:38	-994
Niwot	05:27:18	-62.0	Dark	Down	49.2	142.6	Up	05:13:39 - 05:40:57	-1039
Fall River/Burney	05:28:03	-50.5	Dark	Down	39.7	124.5	Up	05:14:24 - 05:41:42	-1044
SwRI	05:27:18	-62.0	Dark	Down	49.2	142.4	Up	05:13:39 - 05:40:57	-1050
Susanville	05:28:02	-51.2	Dark	Down	40.5	124.8	Up	05:14:23 - 05:41:41	-1100
Gimple	05:28:03	-51.2	Dark	Down	40.6	124.4	Up	05:14:24 - 05:41:42	-1128
Greenville	05:28:03	-51.1	Dark	Down	40.5	124.3	Up	05:14:24 - 05:41:42	-1128
Quincy	05:28:04	-51.2	Dark	Down	40.6	124.2	Up	05:14:25 - 05:41:43	-1147
Portola	05:28:03	-51.5	Dark	Down	41.0	124.6	Up	05:14:24 - 05:41:42	-1157
Reno	05:28:01	-52.1	Dark	Down	41.6	125.1	Up	05:14:22 - 05:41:40	-1180
Carson City	05:28:02	-52.2	Dark	Down	41.8	124.8	Up	05:14:23 - 05:41:41	-1214
Yerington	05:28:00	-52.7	Dark	Down	42.3	125.3	Up	05:14:21 - 05:41:39	-1230
Gardnerville	05:28:02	-52.3	Dark	Down	41.9	124.7	Up	05:14:23 - 05:41:41	-1237
Hawthorne	05:27:59	-53.2	Dark	Down	42.9	125.5	Up	05:14:20 - 05:41:38	-1272
Tonopah	05:27:56	-54.4	Dark	Down	44.1	126.6	Up	05:14:17 - 05:41:35	-1310
Lee Vining	05:28:01	-53.0	Dark	Down	42.9	124.6	Up	05:14:22 - 05:41:40	-1328
Bishop	05:28:00	-53.7	Dark	Down	43.7	124.9	Up	05:14:21 - 05:41:39	-1383
Beatty	05:27:56	-55.1	Dark	Down	45.0	126.2	Up	05:14:17 - 05:41:35	-1420
Indian Springs	05:27:53	-56.0	Dark	Down	45.9	127.1	Up	05:14:14 - 05:41:32	-1446
Henderson	05:27:51	-56.7	Dark	Down	46.7	127.4	Up	05:14:12 - 05:41:30	-1495
Patrick	05:27:48	-57.7	Dark	Down	47.8	128.1	Up	05:14:09 - 05:41:27	-1550
Searchlight/Boulder City	05:27:51	-56.9	Dark	Down	47.1	127.0	Up	05:14:12 - 05:41:30	-1551
Kingman/Dolan Springs	05:27:49	-57.6	Dark	Down	47.8	127.7	Up	05:14:10 - 05:41:28	-1573
DCO	05:27:46	-58.3	Dark	Down	48.4	128.7	Up	05:14:07 - 05:41:25	-1576
Laughlin/Bullhead City	05:27:51	-57.2	Dark	Down	47.5	127.1	Up	05:14:12 - 05:41:30	-1579
CPSLO	05:28:08	-52.4	Dark	Down	43.3	121.0	Up	05:14:29 - 05:41:47	-1597
Mohave Valley	05:27:51	-57.3	Dark	Down	47.6	126.9	Up	05:14:12 - 05:41:30	-1606
Lake Havasu City	05:27:51	-57.6	Dark	Down	48.0	126.8	Up	05:14:12 - 05:41:30	-1644
Parker	05:27:51	-57.7	Dark	Down	48.3	126.5	Up	05:14:12 - 05:41:30	-1679
George/Scottsdale	05:27:43	-59.7	Dark	Down	50.1	128.9	Up	05:14:04 - 05:41:22	-1706
Wildwood	05:28:04	-54.2	Dark	Down	45.4	122.0	Up	05:14:25 - 05:41:43	-1708
Idyllwild	05:27:59	-55.8	Dark	Down	46.9	123.6	Up	05:14:20 - 05:41:38	-1733
Blythe	05:27:52	-57.6	Dark	Down	48.4	125.7	Up	05:14:13 - 05:41:31	-1733
Calipatria	05:27:56	-56.9	Dark	Down	48.0	124.3	Up	05:14:17 - 05:41:35	-1789
Yuma	05:27:53	-57.7	Dark	Down	48.9	124.8	Up	05:14:14 - 05:41:32	-1827