RECON: TNO occultation with 00QL251

Event between 00QL251 and star GA1000:00122638 with event index number of 1063130

Geocentric closest approach at 2021/10/25 05:45:25 UTC

J2000 position of star is 01:21:27.6 +10:00:12
Equinox of date position of star is 01:22:36.0 +10:06:59
Stellar brightness G=14.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 60 degrees from the moon. Moon is 82% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 41.1 AU from the Sun and 40.2 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 312 seconds.
The 1-sigma cross-track error in the shadow position is 3790 km.
The sky-plane scale is 29119.4 km/arcsec.

The TNO has an absolute magnitude Hv=6.7
Diameter=275.4 km assuming a 5% albedo -- 11.2 sec chord
Diameter=112.4 km assuming a 30% albedo -- 4.6 sec chord
Dynamical classification is 2:1E

Star training set for 00QL251, (2021/10/25 05:45UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:10.5 +16:33:05  0.8 47.66  15
6Bet Ari       01:55:51.0 +20:54:50  2.6 13.43  49
PPM 144653     01:30:11.6 +07:24:22  6.4  3.30  59
PPM 117281     01:23:52.3 +10:28:57  8.0  0.48  59
PPM 144515     01:22:52.9 +09:49:11  9.2  0.31  60
00QL251        01:22:36.5 +10:07:02 14.8        60
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 2.9 sigma about the mid-time.
The median site spacing is 19.4 km RECON observability=1.0 and success probability=11.6%

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

Victoria 05:45:26 -44.5 Dark Up 46.7 144.9 Up 05:30:26 - 06:00:26 598

Clarence Fulton 05:45:12 -45.1 Dark Up 46.6 151.3 Up 05:30:12 - 06:00:12 589

Peachland 05:45:14 -45.3 Dark Up 46.9 150.5 Up 05:30:14 - 06:00:14 569

Kelowna 05:45:13 -45.4 Dark Up 46.9 150.9 Up 05:30:13 - 06:00:13 568

Summerland 05:45:14 -45.5 Dark Up 47.1 150.5 Up 05:30:14 - 06:00:14 556

Penticton 05:45:14 -45.6 Dark Up 47.2 150.6 Up 05:30:14 - 06:00:14 549

Oliver 05:45:15 -45.8 Dark Up 47.5 150.5 Up 05:30:15 - 06:00:15 525

Anarchist Mountain Observatory 05:45:15 -46.0 Dark Up 47.7 150.6 Up 05:30:15 - 06:00:15 508

Tonasket 05:45:16 -46.2 Dark Up 48.0 150.4 Up 05:30:16 - 06:00:16 488

Okanogan 05:45:17 -46.4 Dark Up 48.2 150.0 Up 05:30:17 - 06:00:17 470

Brewster 05:45:18 -46.5 Dark Up 48.4 149.6 Up 05:30:18 - 06:00:18 457

Manson/Chelan 05:45:19 -46.5 Dark Up 48.4 148.9 Up 05:30:19 - 06:00:19 454

Wenatchee 05:45:21 -46.7 Dark Up 48.8 148.4 Up 05:30:21 - 06:00:21 426

Ellensburg 05:45:23 -46.9 Dark Up 49.0 147.9 Up 05:30:23 - 06:00:23 405

Yakima 05:45:24 -47.2 Dark Up 49.4 147.6 Up 05:30:24 - 06:00:24 377

Toppenish/White Swan 05:45:24 -47.4 Dark Up 49.6 147.7 Up 05:30:24 - 06:00:24 356

Goldendale 05:45:26 -47.6 Dark Up 49.9 146.8 Up 05:30:26 - 06:00:26 330

The Dalles 05:45:28 -47.6 Dark Up 50.0 146.1 Up 05:30:28 - 06:00:28 326

Pasco 05:45:21 -48.1 Dark Up 50.2 149.4 Up 05:30:21 - 06:00:21 306

Maupin 05:45:28 -47.9 Dark Up 50.4 146.0 Up 05:30:28 - 06:00:28 292

PNWRO 05:45:21 -48.4 Dark Up 50.5 149.6 Up 05:30:21 - 06:00:21 281

Sisters 05:45:32 -48.2 Dark Up 50.9 144.7 Up 05:30:32 - 06:00:32 245

Redmond 05:45:31 -48.5 Dark Up 51.1 145.2 Up 05:30:31 - 06:00:31 230

Bend 05:45:32 -48.5 Dark Up 51.2 144.9 Up 05:30:32 - 06:00:32 219

Oregon Observatory 05:45:33 -48.6 Dark Up 51.3 144.6 Up 05:30:33 - 06:00:33 211

La Pine/Gilchrist 05:45:33 -48.7 Dark Up 51.4 144.4 Up 05:30:33 - 06:00:33 198

North Lake 05:45:33 -49.3 Dark Up 52.0 144.9 Up 05:30:33 - 06:00:33 145

Chiloquin 05:45:37 -49.2 Dark Up 52.2 143.0 Up 05:30:37 - 06:00:37 127

Klamath Falls 05:45:38 -49.4 Dark Up 52.5 142.9 Up 05:30:38 - 06:00:38 99

Paisley 05:45:33 -49.8 Dark Up 52.7 145.0 Up 05:30:33 - 06:00:33 92

Lakeview 05:45:34 -50.3 Dark Up 53.2 144.9 Up 05:30:34 - 06:00:34 47

Fall River/Burney 05:45:40 -50.4 Dark Up 53.6 142.5 Up 05:30:40 - 06:00:40 -4

Cedarville 05:45:35 -50.8 Dark Up 53.8 144.7 Up 05:30:35 - 06:00:35 -9

Susanville 05:45:39 -51.2 Dark Up 54.5 143.1 Up 05:30:39 - 06:00:39 -79

Greenville 05:45:41 -51.2 Dark Up 54.5 142.4 Up 05:30:41 - 06:00:41 -90

Gimple 05:45:40 -51.3 Dark Up 54.6 142.5 Up 05:30:40 - 06:00:40 -93

Quincy 05:45:41 -51.3 Dark Up 54.7 142.2 Up 05:30:41 - 06:00:41 -106

Portola 05:45:40 -51.7 Dark Up 55.0 142.9 Up 05:30:40 - 06:00:40 -133

Reno 05:45:39 -52.3 Dark Up 55.5 143.6 Up 05:30:39 - 06:00:39 -177

Carson City 05:45:39 -52.5 Dark Up 55.8 143.3 Up 05:30:39 - 06:00:39 -206

Gardnerville 05:45:40 -52.7 Dark Up 56.1 143.2 Up 05:30:40 - 06:00:40 -227

Yerington 05:45:38 -53.0 Dark Up 56.3 144.1 Up 05:30:38 - 06:00:38 -245

Hawthorne 05:45:38 -53.6 Dark Up 56.9 144.6 Up 05:30:38 - 06:00:38 -301

Lee Vining 05:45:40 -53.7 Dark Up 57.1 143.3 Up 05:30:40 - 06:00:40 -329

Tonopah 05:45:34 -54.8 Dark Up 57.9 146.5 Up 05:30:34 - 06:00:34 -391

Bishop 05:45:39 -54.5 Dark Up 58.0 143.9 Up 05:30:39 - 06:00:39 -405

CPSLO 05:45:51 -54.2 Dark Up 58.4 138.3 Up 05:30:51 - 06:00:51 -492

Beatty 05:45:36 -55.8 Dark Up 59.1 146.2 Up 05:30:36 - 06:00:36 -504

Indian Springs 05:45:33 -56.7 Dark Up 59.8 147.7 Up 05:30:33 - 06:00:33 -571

Dunrhomin 05:44:53 -59.0 Dark Up 59.4 169.4 Up 05:29:53 - 05:59:53 -630

Henderson 05:45:32 -57.4 Dark Up 60.6 148.5 Up 05:30:32 - 06:00:32 -642

Wildwood 05:45:48 -56.3 Dark Up 60.5 140.2 Up 05:30:48 - 06:00:48 -672

Laughlin/Bullhead City 05:45:32 -58.3 Dark Up 61.5 148.4 Up 05:30:32 - 06:00:32 -732

Patrick 05:45:30 -58.5 Dark Up 61.6 149.9 Up 05:30:30 - 06:00:30 -737

Kingman/Dolan Springs 05:45:31 -58.6 Dark Up 61.7 149.4 Up 05:30:31 - 06:00:31 -749

Mohave Valley 05:45:33 -58.4 Dark Up 61.7 148.2 Up 05:30:33 - 06:00:33 -756

Idyllwild 05:45:42 -57.8 Dark Up 61.7 143.1 Up 05:30:42 - 06:00:42 -774

Lake Havasu City 05:45:33 -58.8 Dark Up 62.2 148.2 Up 05:30:33 - 06:00:33 -800

Parker 05:45:34 -59.1 Dark Up 62.5 147.9 Up 05:30:34 - 06:00:34 -832

Blythe 05:45:36 -59.2 Dark Up 62.8 146.8 Up 05:30:36 - 06:00:36 -866

Calipatria 05:45:40 -58.9 Dark Up 62.8 144.6 Up 05:30:40 - 06:00:40 -874

Yuma 05:45:38 -59.8 Dark Up 63.6 145.8 Up 05:30:38 - 06:00:38 -946

George/Scottsdale 05:45:27 -60.9 Dark Up 63.9 152.3 Up 05:30:27 - 06:00:27 -962

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 00QL251, (2021/10/25 05:45UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 47.66  15
6Bet Ari       01:54:38.5 +20:48:26  2.6 13.43  49
PPM 144653     01:29:03.1 +07:17:38  6.4  3.30  59
PPM 117281     01:22:43.3 +10:22:09  8.0  0.48  59
PPM 144515     01:21:44.1 +09:42:21  9.2  0.31  60
00QL251        01:21:27.6 +10:00:12 14.8        60
Positions are for J2000

Event circumstances last updated at 2021/08/25 04:10:49 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)
Victoria	05:45:26	-44.5	Dark	Up	46.7	144.9	Up	05:30:26 - 06:00:26	598
Clarence Fulton	05:45:12	-45.1	Dark	Up	46.6	151.3	Up	05:30:12 - 06:00:12	589
Peachland	05:45:14	-45.3	Dark	Up	46.9	150.5	Up	05:30:14 - 06:00:14	569
Kelowna	05:45:13	-45.4	Dark	Up	46.9	150.9	Up	05:30:13 - 06:00:13	568
Summerland	05:45:14	-45.5	Dark	Up	47.1	150.5	Up	05:30:14 - 06:00:14	556
Penticton	05:45:14	-45.6	Dark	Up	47.2	150.6	Up	05:30:14 - 06:00:14	549
Oliver	05:45:15	-45.8	Dark	Up	47.5	150.5	Up	05:30:15 - 06:00:15	525
Anarchist Mountain Observatory	05:45:15	-46.0	Dark	Up	47.7	150.6	Up	05:30:15 - 06:00:15	508
Tonasket	05:45:16	-46.2	Dark	Up	48.0	150.4	Up	05:30:16 - 06:00:16	488
Okanogan	05:45:17	-46.4	Dark	Up	48.2	150.0	Up	05:30:17 - 06:00:17	470
Brewster	05:45:18	-46.5	Dark	Up	48.4	149.6	Up	05:30:18 - 06:00:18	457
Manson/Chelan	05:45:19	-46.5	Dark	Up	48.4	148.9	Up	05:30:19 - 06:00:19	454
Wenatchee	05:45:21	-46.7	Dark	Up	48.8	148.4	Up	05:30:21 - 06:00:21	426
Ellensburg	05:45:23	-46.9	Dark	Up	49.0	147.9	Up	05:30:23 - 06:00:23	405
Yakima	05:45:24	-47.2	Dark	Up	49.4	147.6	Up	05:30:24 - 06:00:24	377
Toppenish/White Swan	05:45:24	-47.4	Dark	Up	49.6	147.7	Up	05:30:24 - 06:00:24	356
Goldendale	05:45:26	-47.6	Dark	Up	49.9	146.8	Up	05:30:26 - 06:00:26	330
The Dalles	05:45:28	-47.6	Dark	Up	50.0	146.1	Up	05:30:28 - 06:00:28	326
Pasco	05:45:21	-48.1	Dark	Up	50.2	149.4	Up	05:30:21 - 06:00:21	306
Maupin	05:45:28	-47.9	Dark	Up	50.4	146.0	Up	05:30:28 - 06:00:28	292
PNWRO	05:45:21	-48.4	Dark	Up	50.5	149.6	Up	05:30:21 - 06:00:21	281
Sisters	05:45:32	-48.2	Dark	Up	50.9	144.7	Up	05:30:32 - 06:00:32	245
Redmond	05:45:31	-48.5	Dark	Up	51.1	145.2	Up	05:30:31 - 06:00:31	230
Bend	05:45:32	-48.5	Dark	Up	51.2	144.9	Up	05:30:32 - 06:00:32	219
Oregon Observatory	05:45:33	-48.6	Dark	Up	51.3	144.6	Up	05:30:33 - 06:00:33	211
La Pine/Gilchrist	05:45:33	-48.7	Dark	Up	51.4	144.4	Up	05:30:33 - 06:00:33	198
North Lake	05:45:33	-49.3	Dark	Up	52.0	144.9	Up	05:30:33 - 06:00:33	145
Chiloquin	05:45:37	-49.2	Dark	Up	52.2	143.0	Up	05:30:37 - 06:00:37	127
Klamath Falls	05:45:38	-49.4	Dark	Up	52.5	142.9	Up	05:30:38 - 06:00:38	99
Paisley	05:45:33	-49.8	Dark	Up	52.7	145.0	Up	05:30:33 - 06:00:33	92
Lakeview	05:45:34	-50.3	Dark	Up	53.2	144.9	Up	05:30:34 - 06:00:34	47
Fall River/Burney	05:45:40	-50.4	Dark	Up	53.6	142.5	Up	05:30:40 - 06:00:40	-4
Cedarville	05:45:35	-50.8	Dark	Up	53.8	144.7	Up	05:30:35 - 06:00:35	-9
Susanville	05:45:39	-51.2	Dark	Up	54.5	143.1	Up	05:30:39 - 06:00:39	-79
Greenville	05:45:41	-51.2	Dark	Up	54.5	142.4	Up	05:30:41 - 06:00:41	-90
Gimple	05:45:40	-51.3	Dark	Up	54.6	142.5	Up	05:30:40 - 06:00:40	-93
Quincy	05:45:41	-51.3	Dark	Up	54.7	142.2	Up	05:30:41 - 06:00:41	-106
Portola	05:45:40	-51.7	Dark	Up	55.0	142.9	Up	05:30:40 - 06:00:40	-133
Reno	05:45:39	-52.3	Dark	Up	55.5	143.6	Up	05:30:39 - 06:00:39	-177
Carson City	05:45:39	-52.5	Dark	Up	55.8	143.3	Up	05:30:39 - 06:00:39	-206
Gardnerville	05:45:40	-52.7	Dark	Up	56.1	143.2	Up	05:30:40 - 06:00:40	-227
Yerington	05:45:38	-53.0	Dark	Up	56.3	144.1	Up	05:30:38 - 06:00:38	-245
Hawthorne	05:45:38	-53.6	Dark	Up	56.9	144.6	Up	05:30:38 - 06:00:38	-301
Lee Vining	05:45:40	-53.7	Dark	Up	57.1	143.3	Up	05:30:40 - 06:00:40	-329
Tonopah	05:45:34	-54.8	Dark	Up	57.9	146.5	Up	05:30:34 - 06:00:34	-391
Bishop	05:45:39	-54.5	Dark	Up	58.0	143.9	Up	05:30:39 - 06:00:39	-405
CPSLO	05:45:51	-54.2	Dark	Up	58.4	138.3	Up	05:30:51 - 06:00:51	-492
Beatty	05:45:36	-55.8	Dark	Up	59.1	146.2	Up	05:30:36 - 06:00:36	-504
Indian Springs	05:45:33	-56.7	Dark	Up	59.8	147.7	Up	05:30:33 - 06:00:33	-571
Dunrhomin	05:44:53	-59.0	Dark	Up	59.4	169.4	Up	05:29:53 - 05:59:53	-630
Henderson	05:45:32	-57.4	Dark	Up	60.6	148.5	Up	05:30:32 - 06:00:32	-642
Wildwood	05:45:48	-56.3	Dark	Up	60.5	140.2	Up	05:30:48 - 06:00:48	-672
Laughlin/Bullhead City	05:45:32	-58.3	Dark	Up	61.5	148.4	Up	05:30:32 - 06:00:32	-732
Patrick	05:45:30	-58.5	Dark	Up	61.6	149.9	Up	05:30:30 - 06:00:30	-737
Kingman/Dolan Springs	05:45:31	-58.6	Dark	Up	61.7	149.4	Up	05:30:31 - 06:00:31	-749
Mohave Valley	05:45:33	-58.4	Dark	Up	61.7	148.2	Up	05:30:33 - 06:00:33	-756
Idyllwild	05:45:42	-57.8	Dark	Up	61.7	143.1	Up	05:30:42 - 06:00:42	-774
Lake Havasu City	05:45:33	-58.8	Dark	Up	62.2	148.2	Up	05:30:33 - 06:00:33	-800
Parker	05:45:34	-59.1	Dark	Up	62.5	147.9	Up	05:30:34 - 06:00:34	-832
Blythe	05:45:36	-59.2	Dark	Up	62.8	146.8	Up	05:30:36 - 06:00:36	-866
Calipatria	05:45:40	-58.9	Dark	Up	62.8	144.6	Up	05:30:40 - 06:00:40	-874
Yuma	05:45:38	-59.8	Dark	Up	63.6	145.8	Up	05:30:38 - 06:00:38	-946
George/Scottsdale	05:45:27	-60.9	Dark	Up	63.9	152.3	Up	05:30:27 - 06:00:27	-962