RECON: TNO occultation with 523700

Event between (523700) 14GM54 and star GA1100:09170687 with event index number of 324570

Geocentric closest approach at 2020/09/23 08:08:57 UTC

J2000 position of star is 19:25:40.1 +20:56:00
Equinox of date position of star is 19:26:31.5 +20:58:25
Stellar brightness G=13.7, use SENSEUP=64
Star is 53 degrees from the moon. Moon is 42% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 27.1 AU from the Sun and 26.8 AU from the Earth.
The TNO is moving 23.2 km/sec on the sky relative to the star, or, 4.3 arcsec/hr.
The 1-sigma error in the time of the event is 55 seconds.
The 1-sigma cross-track error in the shadow position is 2015 km.
The sky-plane scale is 19415.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.9 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.0 sec chord
Dynamical classification is 3:2E+6:4II

Star training set for 523700, (2020/09/23 08:09UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:38.4 +38:48:14  0.0 20.70  64
Tarazed        19:47:14.7 +10:39:54  2.7 11.44  49
PPM 108971     19:26:16.5 +20:18:50  6.4  0.67  53
PPM 108944     19:25:26.9 +21:33:29  8.4  0.64  53
PPM 109022     19:27:42.5 +21:04:19  9.0  0.28  53
523700         19:26:33.9 +20:58:32 13.7        53
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 20.8 km RECON observability=1.0 and success probability=19.7%

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 08:05:36 -39.9 Dark Down 26.5 271.4 Low 08:00:32 - 08:10:40 1835

Kelowna 08:05:37 -40.3 Dark Down 26.6 271.5 Low 08:00:33 - 08:10:41 1802

Summerland 08:05:38 -40.6 Dark Down 26.7 271.5 Low 08:00:34 - 08:10:42 1781

Penticton 08:05:38 -40.7 Dark Down 26.6 271.6 Low 08:00:34 - 08:10:42 1773

Victoria 08:05:47 -41.8 Dark Down 29.1 269.3 Low 08:00:43 - 08:10:51 1759

Oliver 08:05:39 -41.0 Dark Down 26.6 271.8 Low 08:00:35 - 08:10:43 1741

Anarchist Mountain Observatory 08:05:39 -41.2 Dark Down 26.5 272.0 Low 08:00:35 - 08:10:43 1721

Tonasket 08:05:41 -41.5 Dark Down 26.5 272.1 Low 08:00:37 - 08:10:45 1695

Okanogan 08:05:42 -41.8 Dark Down 26.6 272.2 Low 08:00:38 - 08:10:46 1667

Brewster 08:05:42 -42.1 Dark Down 26.7 272.2 Low 08:00:38 - 08:10:46 1647

Manson/Chelan 08:05:43 -42.3 Dark Down 27.0 272.0 Low 08:00:39 - 08:10:47 1635

Entiat 08:05:44 -42.6 Dark Down 27.0 272.1 Low 08:00:40 - 08:10:48 1617

Wenatchee 08:05:45 -42.8 Dark Down 27.1 272.1 Low 08:00:41 - 08:10:49 1596

Ellensburg 08:05:47 -43.2 Dark Down 27.2 272.2 Low 08:00:43 - 08:10:51 1563

Yakima 08:05:48 -43.6 Dark Down 27.2 272.4 Low 08:00:44 - 08:10:52 1528

Toppenish/White Swan 08:05:48 -43.9 Dark Down 27.1 272.6 Low 08:00:44 - 08:10:52 1505

Pasco 08:05:47 -43.9 Dark Down 26.2 273.6 Low 08:00:43 - 08:10:51 1471

Goldendale 08:05:51 -44.4 Dark Down 27.3 272.6 Low 08:00:47 - 08:10:55 1466

The Dalles 08:05:52 -44.7 Dark Down 27.6 272.5 Low 08:00:48 - 08:10:56 1454

PNWRO 08:05:47 -44.1 Dark Down 26.0 273.9 Low 08:00:43 - 08:10:51 1445

Maupin 08:05:53 -45.1 Dark Down 27.5 272.8 Low 08:00:49 - 08:10:57 1415

Sisters 08:05:56 -46.0 Dark Down 27.8 272.9 Low 08:00:52 - 08:11:00 1350

Redmond 08:05:56 -46.0 Dark Down 27.5 273.2 Low 08:00:52 - 08:11:00 1339

Bend 08:05:57 -46.2 Dark Down 27.6 273.2 Low 08:00:53 - 08:11:01 1324

Oregon Observatory 08:05:57 -46.4 Dark Down 27.6 273.2 Low 08:00:53 - 08:11:01 1312

La Pine/Gilchrist 08:05:58 -46.6 Dark Down 27.7 273.3 Low 08:00:54 - 08:11:02 1296

North Lake 08:05:58 -47.0 Dark Down 27.2 273.9 Low 08:00:54 - 08:11:02 1246

Paisley 08:06:00 -47.5 Dark Down 26.9 274.4 Low 08:00:56 - 08:11:04 1193

Klamath Falls 08:06:03 -48.0 Dark Down 27.8 273.9 Low 08:00:59 - 08:11:07 1181

Lakeview 08:06:01 -48.0 Dark Down 26.7 274.8 Low 08:00:57 - 08:11:05 1146

Cedarville 08:06:04 -48.7 Dark Down 26.5 275.3 Low 08:01:00 - 08:11:08 1089

Fall River/Burney 08:06:07 -49.2 Dark Down 27.4 274.7 Low 08:01:03 - 08:11:11 1076

Susanville 08:06:07 -49.8 Dark Down 26.8 275.5 Low 08:01:03 - 08:11:11 1008

Greenville 08:06:08 -50.1 Dark Down 27.0 275.5 Low 08:01:04 - 08:11:12 992

Gimple 08:06:08 -50.1 Dark Down 26.9 275.5 Low 08:01:04 - 08:11:12 990

Quincy 08:06:10 -50.3 Dark Down 26.9 275.6 Low 08:01:06 - 08:11:14 976

Portola 08:06:09 -50.4 Dark Down 26.6 275.9 Low 08:01:05 - 08:11:13 955

Reno 08:06:09 -50.6 Dark Down 26.0 276.5 Low 08:01:05 - 08:11:13 920

Carson City 08:06:10 -51.0 Dark Down 26.0 276.6 Low 08:01:06 - 08:11:14 891

Gardnerville 08:06:11 -51.2 Dark Down 25.9 276.8 Low 08:01:07 - 08:11:15 871

Yerington 08:06:10 -51.1 Dark Down 25.5 277.1 Low 08:01:06 - 08:11:14 863

Niwot 08:05:47 -46.9 Dark Down 15.1 284.8 Really Low 08:00:43 - 08:10:51 816

Hawthorne 08:06:11 -51.5 Dark Down 25.0 277.6 Low 08:01:07 - 08:11:15 815

SwRI 08:05:47 -47.0 Dark Down 15.2 284.8 Really Low 08:00:43 - 08:10:51 807

Lee Vining 08:06:13 -52.1 Dark Down 25.3 277.6 Low 08:01:09 - 08:11:17 780

Tonopah 08:06:10 -51.8 Dark Down 23.8 278.7 Low 08:01:06 - 08:11:14 752

Bishop 08:06:14 -52.6 Dark Down 24.6 278.3 Low 08:01:10 - 08:11:18 720

Beatty 08:06:13 -52.9 Dark Down 23.3 279.4 Low 08:01:09 - 08:11:17 655

CPSLO 08:06:24 -54.9 Dark Down 26.1 278.1 Low 08:01:20 - 08:11:28 613

Indian Springs 08:06:13 -53.0 Dark Down 22.4 280.1 Low 08:01:09 - 08:11:17 612

Henderson 08:06:14 -53.4 Dark Down 21.7 280.7 Low 08:01:10 - 08:11:18 561

Searchlight/Boulder City 08:06:16 -53.9 Dark Down 21.5 281.0 Low 08:01:12 - 08:11:20 516

Patrick 08:06:14 -53.8 Dark Down 20.7 281.5 Low 08:01:10 - 08:11:18 498

Laughlin/Bullhead City 08:06:16 -54.2 Dark Down 21.2 281.3 Low 08:01:12 - 08:11:20 489

Kingman/Dolan Springs 08:06:15 -54.0 Dark Down 20.8 281.5 Low 08:01:11 - 08:11:19 484

Wildwood 08:06:26 -55.9 Dark Down 24.2 279.7 Low 08:01:22 - 08:11:30 479

Mohave Valley 08:06:17 -54.4 Dark Down 21.1 281.4 Low 08:01:13 - 08:11:21 469

DCO 08:06:14 -53.9 Dark Down 20.1 282.0 Low 08:01:10 - 08:11:18 466

Lake Havasu City 08:06:18 -54.7 Dark Down 20.9 281.7 Low 08:01:14 - 08:11:22 435

Idyllwild 08:06:24 -56.0 Dark Down 22.6 280.8 Low 08:01:20 - 08:11:28 416

Parker 08:06:19 -55.1 Dark Down 20.8 281.8 Low 08:01:15 - 08:11:23 409

Blythe 08:06:21 -55.6 Dark Down 20.9 281.9 Low 08:01:17 - 08:11:25 375

Calipatria 08:06:24 -56.3 Dark Down 21.5 281.6 Low 08:01:20 - 08:11:28 354

George/Scottsdale 08:06:17 -54.8 Dark Down 18.7 283.2 Really Low 08:01:13 - 08:11:21 349

Yuma 08:06:25 -56.5 Dark Down 20.7 282.2 Low 08:01:21 - 08:11:29 309

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 523700, (2020/09/23 08:09UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 20.70  64
Tarazed        19:46:15.6 +10:36:48  2.7 11.44  49
PPM 108971     19:25:22.3 +20:16:18  6.4  0.67  53
PPM 108944     19:24:33.4 +21:30:58  8.4  0.64  53
PPM 109022     19:26:48.7 +21:01:45  9.0  0.28  53
523700         19:25:40.1 +20:56:00 13.7        53
Positions are for J2000

Event circumstances last updated at 2019/10/16 21:25:53 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	08:05:36	-39.9	Dark	Down	26.5	271.4	Low	08:00:32 - 08:10:40	1835
Kelowna	08:05:37	-40.3	Dark	Down	26.6	271.5	Low	08:00:33 - 08:10:41	1802
Summerland	08:05:38	-40.6	Dark	Down	26.7	271.5	Low	08:00:34 - 08:10:42	1781
Penticton	08:05:38	-40.7	Dark	Down	26.6	271.6	Low	08:00:34 - 08:10:42	1773
Victoria	08:05:47	-41.8	Dark	Down	29.1	269.3	Low	08:00:43 - 08:10:51	1759
Oliver	08:05:39	-41.0	Dark	Down	26.6	271.8	Low	08:00:35 - 08:10:43	1741
Anarchist Mountain Observatory	08:05:39	-41.2	Dark	Down	26.5	272.0	Low	08:00:35 - 08:10:43	1721
Tonasket	08:05:41	-41.5	Dark	Down	26.5	272.1	Low	08:00:37 - 08:10:45	1695
Okanogan	08:05:42	-41.8	Dark	Down	26.6	272.2	Low	08:00:38 - 08:10:46	1667
Brewster	08:05:42	-42.1	Dark	Down	26.7	272.2	Low	08:00:38 - 08:10:46	1647
Manson/Chelan	08:05:43	-42.3	Dark	Down	27.0	272.0	Low	08:00:39 - 08:10:47	1635
Entiat	08:05:44	-42.6	Dark	Down	27.0	272.1	Low	08:00:40 - 08:10:48	1617
Wenatchee	08:05:45	-42.8	Dark	Down	27.1	272.1	Low	08:00:41 - 08:10:49	1596
Ellensburg	08:05:47	-43.2	Dark	Down	27.2	272.2	Low	08:00:43 - 08:10:51	1563
Yakima	08:05:48	-43.6	Dark	Down	27.2	272.4	Low	08:00:44 - 08:10:52	1528
Toppenish/White Swan	08:05:48	-43.9	Dark	Down	27.1	272.6	Low	08:00:44 - 08:10:52	1505
Pasco	08:05:47	-43.9	Dark	Down	26.2	273.6	Low	08:00:43 - 08:10:51	1471
Goldendale	08:05:51	-44.4	Dark	Down	27.3	272.6	Low	08:00:47 - 08:10:55	1466
The Dalles	08:05:52	-44.7	Dark	Down	27.6	272.5	Low	08:00:48 - 08:10:56	1454
PNWRO	08:05:47	-44.1	Dark	Down	26.0	273.9	Low	08:00:43 - 08:10:51	1445
Maupin	08:05:53	-45.1	Dark	Down	27.5	272.8	Low	08:00:49 - 08:10:57	1415
Sisters	08:05:56	-46.0	Dark	Down	27.8	272.9	Low	08:00:52 - 08:11:00	1350
Redmond	08:05:56	-46.0	Dark	Down	27.5	273.2	Low	08:00:52 - 08:11:00	1339
Bend	08:05:57	-46.2	Dark	Down	27.6	273.2	Low	08:00:53 - 08:11:01	1324
Oregon Observatory	08:05:57	-46.4	Dark	Down	27.6	273.2	Low	08:00:53 - 08:11:01	1312
La Pine/Gilchrist	08:05:58	-46.6	Dark	Down	27.7	273.3	Low	08:00:54 - 08:11:02	1296
North Lake	08:05:58	-47.0	Dark	Down	27.2	273.9	Low	08:00:54 - 08:11:02	1246
Paisley	08:06:00	-47.5	Dark	Down	26.9	274.4	Low	08:00:56 - 08:11:04	1193
Klamath Falls	08:06:03	-48.0	Dark	Down	27.8	273.9	Low	08:00:59 - 08:11:07	1181
Lakeview	08:06:01	-48.0	Dark	Down	26.7	274.8	Low	08:00:57 - 08:11:05	1146
Cedarville	08:06:04	-48.7	Dark	Down	26.5	275.3	Low	08:01:00 - 08:11:08	1089
Fall River/Burney	08:06:07	-49.2	Dark	Down	27.4	274.7	Low	08:01:03 - 08:11:11	1076
Susanville	08:06:07	-49.8	Dark	Down	26.8	275.5	Low	08:01:03 - 08:11:11	1008
Greenville	08:06:08	-50.1	Dark	Down	27.0	275.5	Low	08:01:04 - 08:11:12	992
Gimple	08:06:08	-50.1	Dark	Down	26.9	275.5	Low	08:01:04 - 08:11:12	990
Quincy	08:06:10	-50.3	Dark	Down	26.9	275.6	Low	08:01:06 - 08:11:14	976
Portola	08:06:09	-50.4	Dark	Down	26.6	275.9	Low	08:01:05 - 08:11:13	955
Reno	08:06:09	-50.6	Dark	Down	26.0	276.5	Low	08:01:05 - 08:11:13	920
Carson City	08:06:10	-51.0	Dark	Down	26.0	276.6	Low	08:01:06 - 08:11:14	891
Gardnerville	08:06:11	-51.2	Dark	Down	25.9	276.8	Low	08:01:07 - 08:11:15	871
Yerington	08:06:10	-51.1	Dark	Down	25.5	277.1	Low	08:01:06 - 08:11:14	863
Niwot	08:05:47	-46.9	Dark	Down	15.1	284.8	Really Low	08:00:43 - 08:10:51	816
Hawthorne	08:06:11	-51.5	Dark	Down	25.0	277.6	Low	08:01:07 - 08:11:15	815
SwRI	08:05:47	-47.0	Dark	Down	15.2	284.8	Really Low	08:00:43 - 08:10:51	807
Lee Vining	08:06:13	-52.1	Dark	Down	25.3	277.6	Low	08:01:09 - 08:11:17	780
Tonopah	08:06:10	-51.8	Dark	Down	23.8	278.7	Low	08:01:06 - 08:11:14	752
Bishop	08:06:14	-52.6	Dark	Down	24.6	278.3	Low	08:01:10 - 08:11:18	720
Beatty	08:06:13	-52.9	Dark	Down	23.3	279.4	Low	08:01:09 - 08:11:17	655
CPSLO	08:06:24	-54.9	Dark	Down	26.1	278.1	Low	08:01:20 - 08:11:28	613
Indian Springs	08:06:13	-53.0	Dark	Down	22.4	280.1	Low	08:01:09 - 08:11:17	612
Henderson	08:06:14	-53.4	Dark	Down	21.7	280.7	Low	08:01:10 - 08:11:18	561
Searchlight/Boulder City	08:06:16	-53.9	Dark	Down	21.5	281.0	Low	08:01:12 - 08:11:20	516
Patrick	08:06:14	-53.8	Dark	Down	20.7	281.5	Low	08:01:10 - 08:11:18	498
Laughlin/Bullhead City	08:06:16	-54.2	Dark	Down	21.2	281.3	Low	08:01:12 - 08:11:20	489
Kingman/Dolan Springs	08:06:15	-54.0	Dark	Down	20.8	281.5	Low	08:01:11 - 08:11:19	484
Wildwood	08:06:26	-55.9	Dark	Down	24.2	279.7	Low	08:01:22 - 08:11:30	479
Mohave Valley	08:06:17	-54.4	Dark	Down	21.1	281.4	Low	08:01:13 - 08:11:21	469
DCO	08:06:14	-53.9	Dark	Down	20.1	282.0	Low	08:01:10 - 08:11:18	466
Lake Havasu City	08:06:18	-54.7	Dark	Down	20.9	281.7	Low	08:01:14 - 08:11:22	435
Idyllwild	08:06:24	-56.0	Dark	Down	22.6	280.8	Low	08:01:20 - 08:11:28	416
Parker	08:06:19	-55.1	Dark	Down	20.8	281.8	Low	08:01:15 - 08:11:23	409
Blythe	08:06:21	-55.6	Dark	Down	20.9	281.9	Low	08:01:17 - 08:11:25	375
Calipatria	08:06:24	-56.3	Dark	Down	21.5	281.6	Low	08:01:20 - 08:11:28	354
George/Scottsdale	08:06:17	-54.8	Dark	Down	18.7	283.2	Really Low	08:01:13 - 08:11:21	349
Yuma	08:06:25	-56.5	Dark	Down	20.7	282.2	Low	08:01:21 - 08:11:29	309