RECON: TNO occultation with 120181

Event between (120181) 03UR292 and star GA1060:00422126 with event index number of 1098882

Geocentric closest approach at 2022/01/05 10:13:19 UTC

J2000 position of star is 03:52:56.4 +17:23:23
Equinox of date position of star is 03:54:11.7 +17:27:13
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 98 degrees from the moon. Moon is 10% illuminated.
TNO apparent brightness V=21.9

[RECON map]
TNO is 27.2 AU from the Sun and 26.5 AU from the Earth.
The TNO is moving 15.3 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 73 seconds.
The 1-sigma cross-track error in the shadow position is 983 km.
The sky-plane scale is 19206.0 km/arcsec.

The TNO has an absolute magnitude Hv=7.4
Diameter=201.4 km assuming a 5% albedo -- 13.1 sec chord
Diameter=82.2 km assuming a 30% albedo -- 5.4 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 120181, (2022/01/05 10:14UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:11.2 +16:33:07  0.8 10.32 107
44Zet Per      03:55:31.3 +31:56:50  2.8 14.50 102
PPM 119433     03:54:25.8 +17:23:28  6.0  0.08  98
120181         03:54:12.0 +17:27:14 16.2        98
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 27.4 km RECON observability=0.5 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:08:20 -44.9 Dark Down 11.9 283.1 Really Low 10:01:45 - 10:14:54 8277
Kamloops 10:08:20 -53.3 Dark Down 20.6 272.6 Low 10:01:46 - 10:14:55 7879
Kelowna 10:08:16 -53.4 Dark Down 20.0 273.5 Low 10:01:41 - 10:14:50 7827
Peachland 10:08:15 -53.6 Dark Down 20.2 273.3 Low 10:01:40 - 10:14:49 7812
Summerland 10:08:13 -53.6 Dark Down 20.1 273.5 Low 10:01:39 - 10:14:48 7801
Penticton 10:08:14 -53.6 Dark Down 20.1 273.6 Low 10:01:40 - 10:14:49 7797
Oliver 10:08:12 -53.8 Dark Down 20.0 273.7 Low 10:01:37 - 10:14:46 7767
Anarchist Mountain Observatory 10:08:12 -53.8 Dark Down 19.9 273.9 Really Low 10:01:37 - 10:14:46 7757
Tonasket 10:08:10 -54.0 Dark Down 19.9 274.0 Really Low 10:01:35 - 10:14:44 7729
Okanogan 10:08:09 -54.3 Dark Down 20.0 274.0 Low 10:01:34 - 10:14:43 7697
Brewster 10:08:07 -54.6 Dark Down 20.1 273.9 Low 10:01:33 - 10:14:42 7669
Manson/Chelan 10:08:06 -54.9 Dark Down 20.4 273.7 Low 10:01:32 - 10:14:41 7644
Victoria 10:08:14 -56.2 Dark Down 22.5 271.1 Low 10:01:40 - 10:14:49 7637
Wenatchee 10:08:05 -55.3 Dark Down 20.4 273.8 Low 10:01:30 - 10:14:39 7599
Ellensburg 10:08:05 -55.6 Dark Down 20.6 273.8 Low 10:01:30 - 10:14:39 7559
Yakima 10:08:02 -55.9 Dark Down 20.6 273.9 Low 10:01:27 - 10:14:36 7522
Pasco 10:07:58 -55.2 Dark Down 19.6 275.0 Really Low 10:01:23 - 10:14:32 7521
Toppenish/White Swan 10:08:00 -55.9 Dark Down 20.4 274.1 Low 10:01:26 - 10:14:35 7506
PNWRO 10:07:57 -55.2 Dark Down 19.4 275.3 Really Low 10:01:22 - 10:14:31 7504
Goldendale 10:07:58 -56.5 Dark Down 20.7 274.0 Low 10:01:24 - 10:14:33 7449
The Dalles 10:07:58 -56.8 Dark Down 20.9 273.8 Low 10:01:24 - 10:14:33 7421
Maupin 10:07:57 -57.0 Dark Down 20.8 274.1 Low 10:01:23 - 10:14:32 7385
Dunrhomin 10:07:25 -48.0 Dark Down 8.6 285.6 Really Low 10:00:51 - 10:14:00 7312
Redmond 10:07:53 -57.5 Dark Down 20.9 274.3 Low 10:01:18 - 10:14:27 7302
Sisters 10:07:52 -57.8 Dark Down 21.1 274.0 Low 10:01:18 - 10:14:27 7296
Bend 10:07:51 -57.7 Dark Down 20.9 274.3 Low 10:01:17 - 10:14:26 7279
Oregon Observatory 10:07:51 -57.9 Dark Down 21.0 274.3 Low 10:01:16 - 10:14:25 7261
La Pine/Gilchrist 10:07:50 -58.1 Dark Down 21.1 274.3 Low 10:01:16 - 10:14:25 7241
North Lake 10:07:48 -57.9 Dark Down 20.6 274.9 Low 10:01:13 - 10:14:22 7213
Paisley 10:07:45 -58.0 Dark Down 20.3 275.3 Low 10:01:11 - 10:14:20 7170
Chiloquin 10:07:47 -58.9 Dark Down 21.2 274.5 Low 10:01:12 - 10:14:21 7131
Lakeview 10:07:43 -58.1 Dark Down 20.1 275.6 Low 10:01:09 - 10:14:18 7127
Klamath Falls 10:07:45 -59.0 Dark Down 21.2 274.7 Low 10:01:10 - 10:14:19 7100
Cedarville 10:07:40 -58.3 Dark Down 19.9 276.0 Really Low 10:01:06 - 10:14:15 7070
Fall River/Burney 10:07:40 -59.3 Dark Down 20.8 275.4 Low 10:01:06 - 10:14:15 6998
Susanville 10:07:37 -59.1 Dark Down 20.2 276.0 Low 10:01:02 - 10:14:11 6954
Gimple 10:07:36 -59.4 Dark Down 20.3 276.0 Low 10:01:02 - 10:14:11 6923
Greenville 10:07:36 -59.5 Dark Down 20.4 276.0 Low 10:01:01 - 10:14:10 6922
Quincy 10:07:35 -59.5 Dark Down 20.3 276.0 Low 10:01:01 - 10:14:10 6902
Portola 10:07:34 -59.3 Dark Down 20.0 276.4 Really Low 10:01:00 - 10:14:09 6901
Reno 10:07:33 -58.9 Dark Down 19.4 276.9 Really Low 10:00:58 - 10:14:07 6890
Carson City 10:07:30 -59.1 Dark Down 19.4 277.0 Really Low 10:00:56 - 10:14:05 6857
Yerington 10:07:29 -58.7 Dark Down 18.9 277.4 Really Low 10:00:55 - 10:14:04 6853
Gardnerville 10:07:29 -59.1 Dark Down 19.3 277.1 Really Low 10:00:55 - 10:14:04 6835
Hawthorne 10:07:27 -58.5 Dark Down 18.4 277.9 Really Low 10:00:52 - 10:14:01 6820
Tonopah 10:07:23 -57.6 Dark Down 17.3 278.9 Really Low 10:00:49 - 10:13:58 6809
Lee Vining 10:07:25 -59.0 Dark Down 18.7 277.8 Really Low 10:00:51 - 10:14:00 6755
Bishop 10:07:23 -58.7 Dark Down 18.1 278.4 Really Low 10:00:49 - 10:13:58 6714
Beatty 10:07:19 -57.6 Dark Down 16.7 279.5 Really Low 10:00:45 - 10:13:54 6709
Indian Springs 10:07:16 -56.9 Dark Down 15.8 280.2 Really Low 10:00:42 - 10:13:51 6704
Henderson 10:07:14 -56.5 Dark Down 15.2 280.7 Really Low 10:00:39 - 10:13:48 6669
Patrick 10:07:12 -55.8 Dark Down 14.2 281.4 Really Low 10:00:37 - 10:13:46 6637
Kingman/Dolan Springs 10:07:11 -56.0 Dark Down 14.3 281.4 Really Low 10:00:36 - 10:13:45 6611
Laughlin/Bullhead City 10:07:10 -56.4 Dark Down 14.7 281.1 Really Low 10:00:36 - 10:13:45 6595
Mohave Valley 10:07:10 -56.4 Dark Down 14.7 281.2 Really Low 10:00:35 - 10:13:44 6569
Lake Havasu City 10:07:09 -56.3 Dark Down 14.4 281.4 Really Low 10:00:34 - 10:13:43 6536
George/Scottsdale 10:07:04 -54.4 Dark Down 12.2 282.9 Really Low 10:00:30 - 10:13:39 6525
Parker 10:07:07 -56.4 Dark Down 14.3 281.5 Really Low 10:00:32 - 10:13:41 6502
CPSLO 10:07:18 -61.1 Dark Down 19.6 277.8 Really Low 10:00:44 - 10:13:53 6459
Blythe 10:07:06 -56.7 Dark Down 14.4 281.5 Really Low 10:00:32 - 10:13:41 6443
Idyllwild 10:07:09 -58.4 Dark Down 16.2 280.4 Really Low 10:00:34 - 10:13:43 6401
Wildwood 10:07:12 -59.8 Dark Down 17.8 279.3 Really Low 10:00:37 - 10:13:46 6389
Calipatria 10:07:06 -57.6 Dark Down 15.1 281.2 Really Low 10:00:31 - 10:13:40 6371
Yuma 10:07:03 -56.9 Dark Down 14.3 281.7 Really Low 10:00:29 - 10:13:38 6351

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 120181, (2022/01/05 10:14UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 10.32 107
44Zet Per      03:54:07.9 +31:53:01  2.8 14.50 102
PPM 119433     03:53:10.2 +17:19:37  6.0  0.08  98
120181         03:52:56.4 +17:23:23 16.2        98
Positions are for J2000

Event circumstances last updated at 2021/12/06 01:45:25 UT

Marc W. Buie, Southwest Research Institute

RECON