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 01:22:31.3 +10:06:31
Stellar brightness G=14.8, use SENSEUP=128
Star is 60 degrees from the moon. Moon is 82% illuminated.
TNO apparent brightness V=26.1

[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 3789 km.
The sky-plane scale is 29119.4 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=275.4 km assuming a 5% albedo -- 2.5 sec chord
Diameter=112.4 km assuming a 30% albedo -- 1.0 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 17.3 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 - 06:00:14 548
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 - 06:00:15 507
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
Entiat 05:45:20 -46.6 Dark Up 48.6 148.7 Up 05:30:20 - 06:00:20 441
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 - 06:00:23 404
Yakima 05:45:24 -47.2 Dark Up 49.4 147.6 Up 05:30:24 - 06:00:24 376
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
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 -10
Susanville 05:45:39 -51.2 Dark Up 54.5 143.1 Up 05:30:39 - 06:00:39 -79
Greenville 05:45:40 -51.2 Dark Up 54.5 142.4 Up 05:30:40 - 06:00:40 -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 -228
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 -302
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 05:45:40 -54.5 Dark Up 58.0 143.9 Up 05:30:40 - 06:00:40 -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
Niwot 05:44:53 -59.1 Dark Up 59.5 169.3 Up 05:29:53 - 05:59:53 -642
Henderson 05:45:32 -57.4 Dark Up 60.6 148.5 Up 05:30:32 - 06:00:32 -642
SwRI 05:44:54 -59.2 Dark Up 59.6 169.1 Up 05:29:54 - 05:59:54 -648
Wildwood 05:45:48 -56.3 Dark Up 60.5 140.2 Up 05:30:48 - 06:00:48 -672
Searchlight/Boulder City 05:45:33 -57.8 Dark Up 61.1 148.1 Up 05:30:33 - 06:00:33 -694
Laughlin/Bullhead City 05:45:32 -58.3 Dark Up 61.5 148.4 Up 05:30:32 - 06:00:32 -733
Patrick 05:45:30 -58.5 Dark Up 61.6 149.9 Up 05:30:30 - 06:00:30 -738
Kingman/Dolan Springs 05:45:31 -58.6 Dark Up 61.7 149.4 Up 05:30:31 - 06:00:31 -750
Mohave Valley 05:45:33 -58.4 Dark Up 61.7 148.2 Up 05:30:33 - 06:00:33 -756
Idyllwild 05:45:43 -57.8 Dark Up 61.7 143.1 Up 05:30:43 - 06:00:43 -775
DCO 05:45:28 -59.2 Dark Up 62.1 151.0 Up 05:30:28 - 06:00:28 -790
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 -867
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 -947
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 +16:30:30  0.8 47.66  15
6Bet Ari       01:54:38.5 +20:48:27  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 2020/03/06 23:29:42 UT

Marc W. Buie, Southwest Research Institute

RECON