RECON: TNO occultation with 530838

Event between (530838) 11UC411 and star GA1120:00380043 with event index number of 1598861

Geocentric closest approach at 2020/12/10 04:39:49 UTC

J2000 position of star is 03:14:30.1 +22:09:13
Equinox of date position of star is 03:15:43.0 +22:13:49
Stellar brightness G=12.5, use SENSEUP=16
Star is 144 degrees from the moon. Moon is 26% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 29.8 AU from the Sun and 28.9 AU from the Earth.
The TNO is moving 21.1 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 105 seconds.
The 1-sigma cross-track error in the shadow position is 1368 km.
The sky-plane scale is 20949.8 km/arcsec.

The TNO has an absolute magnitude Hv=8.0
Diameter=151.4 km assuming a 5% albedo -- 7.2 sec chord
Diameter=61.8 km assuming a 30% albedo -- 2.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 530838, (2020/12/10 04:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.5 +16:32:59  0.8 20.00 127
44Zet Per      03:55:27.2 +31:56:39  2.8 13.12 131
58Zet Ari      03:16:06.6 +21:07:15  4.9  1.11 144
PPM 092277     03:12:32.4 +22:14:55  8.0  0.74 145
PPM 092309     03:15:03.2 +22:19:45  9.0  0.18 144
530838         03:15:43.0 +22:13:50 12.5       144
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 18.6 km RECON observability=1.0 and success probability=4.2%
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 04:40:04 -44.2 Dark Down 58.4 145.8 Up 04:30:47 - 04:49:21 5011
Victoria 04:40:21 -42.2 Dark Down 58.1 137.7 Up 04:31:04 - 04:49:38 4993
Kelowna 04:40:05 -44.3 Dark Down 58.6 145.2 Up 04:30:48 - 04:49:22 4984
Peachland 04:40:07 -44.1 Dark Down 58.6 144.6 Up 04:30:50 - 04:49:24 4983
Summerland 04:40:06 -44.2 Dark Down 58.8 144.7 Up 04:30:49 - 04:49:23 4968
Penticton 04:40:07 -44.3 Dark Down 58.9 144.8 Up 04:30:50 - 04:49:24 4959
Oliver 04:40:07 -44.4 Dark Down 59.2 144.4 Up 04:30:50 - 04:49:24 4930
Anarchist Mountain Observatory 04:40:07 -44.6 Dark Down 59.4 144.6 Up 04:30:50 - 04:49:24 4910
Tonasket 04:40:08 -44.6 Dark Down 59.6 144.2 Up 04:30:51 - 04:49:25 4885
Okanogan 04:40:09 -44.6 Dark Down 59.8 143.6 Up 04:30:52 - 04:49:26 4861
Brewster 04:40:11 -44.6 Dark Down 59.9 143.0 Up 04:30:54 - 04:49:28 4845
Manson/Chelan 04:40:13 -44.4 Dark Down 60.0 142.2 Up 04:30:56 - 04:49:30 4838
Entiat 04:40:14 -44.4 Dark Down 60.1 141.8 Up 04:30:57 - 04:49:31 4822
Wenatchee 04:40:14 -44.4 Dark Down 60.3 141.4 Up 04:30:57 - 04:49:31 4803
Ellensburg 04:40:16 -44.4 Dark Down 60.5 140.6 Up 04:30:59 - 04:49:33 4775
Yakima 04:40:17 -44.5 Dark Down 60.8 140.1 Up 04:31:00 - 04:49:34 4741
Toppenish/White Swan 04:40:17 -44.7 Dark Down 61.1 140.1 Up 04:31:00 - 04:49:34 4716
Goldendale 04:40:20 -44.5 Dark Down 61.3 138.8 Up 04:31:03 - 04:49:37 4683
The Dalles 04:40:22 -44.3 Dark Down 61.3 137.9 Up 04:31:05 - 04:49:39 4675
Pasco 04:40:14 -45.5 Dark Down 61.7 142.1 Up 04:30:57 - 04:49:31 4665
PNWRO 04:40:14 -45.8 Dark Down 62.0 142.3 Up 04:30:57 - 04:49:31 4637
Maupin 04:40:23 -44.5 Dark Down 61.6 137.6 Up 04:31:06 - 04:49:40 4635
Sisters 04:40:27 -44.3 Dark Down 62.1 135.7 Up 04:31:10 - 04:49:44 4575
Redmond 04:40:25 -44.6 Dark Down 62.3 136.3 Up 04:31:08 - 04:49:42 4560
Bend 04:40:27 -44.6 Dark Down 62.4 135.8 Up 04:31:10 - 04:49:44 4546
Oregon Observatory 04:40:27 -44.5 Dark Down 62.4 135.3 Up 04:31:10 - 04:49:44 4535
La Pine/Gilchrist 04:40:28 -44.5 Dark Down 62.5 135.0 Up 04:31:11 - 04:49:45 4519
North Lake 04:40:27 -45.0 Dark Down 63.1 135.4 Up 04:31:10 - 04:49:44 4460
Klamath Falls 04:40:33 -44.6 Dark Down 63.4 132.5 Up 04:31:16 - 04:49:50 4399
Paisley 04:40:28 -45.4 Dark Down 63.7 135.2 Up 04:31:11 - 04:49:45 4399
Lakeview 04:40:28 -45.6 Dark Down 64.2 134.8 Up 04:31:11 - 04:49:45 4347
Cedarville 04:40:30 -45.8 Dark Down 64.7 134.2 Up 04:31:13 - 04:49:47 4282
Fall River/Burney 04:40:35 -45.0 Dark Down 64.4 131.3 Up 04:31:18 - 04:49:52 4280
Susanville 04:40:34 -45.7 Dark Down 65.2 131.6 Up 04:31:17 - 04:49:51 4197
Greenville 04:40:36 -45.5 Dark Down 65.3 130.6 Up 04:31:19 - 04:49:53 4182
Gimple 04:40:36 -45.6 Dark Down 65.3 130.8 Up 04:31:19 - 04:49:53 4179
Quincy 04:40:37 -45.5 Dark Down 65.4 130.3 Up 04:31:20 - 04:49:54 4164
Portola 04:40:35 -45.9 Dark Down 65.8 130.9 Up 04:31:18 - 04:49:52 4135
Reno 04:40:33 -46.4 Dark Down 66.3 131.6 Up 04:31:16 - 04:49:50 4088
Carson City 04:40:35 -46.5 Dark Down 66.6 131.1 Up 04:31:18 - 04:49:52 4054
Gardnerville 04:40:35 -46.6 Dark Down 66.7 130.7 Up 04:31:18 - 04:49:52 4030
Yerington 04:40:33 -47.0 Dark Down 67.0 131.9 Up 04:31:16 - 04:49:50 4013
Hawthorne 04:40:32 -47.5 Dark Down 67.7 132.0 Up 04:31:15 - 04:49:49 3951
Lee Vining 04:40:35 -47.2 Dark Down 67.8 130.1 Up 04:31:18 - 04:49:52 3916
Tonopah 04:40:28 -48.6 Dark Down 68.8 133.9 Up 04:31:11 - 04:49:45 3858
Bishop 04:40:34 -47.8 Dark Down 68.6 130.3 Up 04:31:17 - 04:49:51 3834
Beatty 04:40:29 -49.1 Dark Down 69.8 132.6 Up 04:31:12 - 04:49:46 3731
CPSLO 04:40:47 -46.2 Dark Down 68.4 122.1 Up 04:31:30 - 04:50:04 3722
Niwot 04:39:39 -57.0 Dark Down 71.6 166.7 Up 04:30:22 - 04:48:56 3668
Indian Springs 04:40:26 -50.0 Dark Down 70.7 134.2 Up 04:31:09 - 04:49:43 3662
SwRI 04:39:40 -57.0 Dark Down 71.7 166.3 Up 04:30:23 - 04:48:57 3660
Henderson 04:40:25 -50.6 Dark Down 71.5 134.7 Up 04:31:08 - 04:49:42 3586
Wildwood 04:40:43 -47.9 Dark Down 70.4 123.0 Up 04:31:26 - 04:50:00 3529
Searchlight/Boulder City 04:40:26 -50.8 Dark Down 71.9 133.6 Up 04:31:09 - 04:49:43 3528
Laughlin/Bullhead City 04:40:25 -51.1 Dark Down 72.3 133.7 Up 04:31:08 - 04:49:42 3487
Patrick 04:40:22 -51.6 Dark Down 72.5 135.9 Up 04:31:05 - 04:49:39 3486
Kingman/Dolan Springs 04:40:23 -51.5 Dark Down 72.6 135.0 Up 04:31:06 - 04:49:40 3471
Mohave Valley 04:40:25 -51.1 Dark Down 72.5 133.1 Up 04:31:08 - 04:49:42 3460
DCO 04:40:20 -52.2 Dark Down 73.2 137.0 Up 04:31:03 - 04:49:37 3431
Idyllwild 04:40:37 -49.5 Dark Down 71.9 125.7 Up 04:31:20 - 04:49:54 3425
Lake Havasu City 04:40:26 -51.4 Dark Down 72.9 132.8 Up 04:31:09 - 04:49:43 3412
Parker 04:40:27 -51.4 Dark Down 73.2 132.0 Up 04:31:10 - 04:49:44 3376
Blythe 04:40:29 -51.2 Dark Down 73.3 130.0 Up 04:31:12 - 04:49:46 3336
Calipatria 04:40:33 -50.5 Dark Down 73.0 126.6 Up 04:31:16 - 04:49:50 3321
George/Scottsdale 04:40:18 -53.5 Dark Down 74.9 137.2 Up 04:31:01 - 04:49:35 3249
Yuma 04:40:31 -51.3 Dark Down 73.9 127.4 Up 04:31:14 - 04:49:48 3246

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 530838, (2020/12/10 04:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 20.00 127
44Zet Per      03:54:07.9 +31:53:01  2.8 13.12 131
58Zet Ari      03:14:54.0 +21:02:39  4.9  1.11 144
PPM 092277     03:11:19.5 +22:10:14  8.0  0.74 145
PPM 092309     03:13:50.2 +22:15:08  9.0  0.18 144
530838         03:14:30.1 +22:09:13 12.5       144
Positions are for J2000

Event circumstances last updated at 2020/12/04 01:15:13 UT

Marc W. Buie, Southwest Research Institute

RECON