RECON: TNO occultation with 182222

Event between (182222) 00YU1 and star UC4-542-014477 with event index number of 360229

Geocentric closest approach at 2020/10/10 11:00:58 UTC

J2000 position of star is 05:23:06.6 +18:16:26
Equinox of date position of star is 05:24:13.6 +18:17:26
Stellar brightness R=14.0, use SENSEUP=64
Star is 32 degrees from the moon. Moon is 46% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 42.7 AU from the Sun and 42.2 AU from the Earth.
The TNO is moving 9.3 km/sec on the sky relative to the star, or, 1.1 arcsec/hr.
The 1-sigma error in the time of the event is 800 seconds.
The 1-sigma cross-track error in the shadow position is 2904 km.
The sky-plane scale is 30608.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.8
Diameter=263.0 km assuming a 5% albedo -- 28.2 sec chord
Diameter=107.4 km assuming a 30% albedo -- 11.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 182222, (2020/10/10 11:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:06.9 +16:32:58  0.8 11.39  44
Alnath         05:27:36.4 +28:37:23  1.6 10.36  30
111 Tau        05:25:38.2 +17:24:04  5.5  0.94  32
PPM 120901     05:24:43.8 +18:37:08  8.4  0.34  32
PPM 120880     05:23:30.4 +18:13:51  9.7  0.20  33
182222         05:24:19.6 +18:17:31 14.0        32
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 1.1 sigma about the mid-time.
The median site spacing is 18.2 km RECON observability=1.0 and success probability=13.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Summerland 11:00:58 -30.9 Dark Up 56.0 152.5 Up 10:45:58 - 11:15:58 3300
Kelowna 11:00:56 -30.7 Dark Up 56.0 153.1 Up 10:45:56 - 11:15:56 3293
Penticton 11:00:58 -31.0 Dark Up 56.3 152.6 Up 10:45:58 - 11:15:58 3268
Okanagan Falls 11:01:00 -31.1 Dark Up 56.5 152.5 Up 10:46:00 - 11:16:00 3254
Oliver 11:00:59 -31.1 Dark Up 56.6 152.4 Up 10:45:59 - 11:15:59 3240
Anarchist Mountain Observatory 11:00:58 -31.1 Dark Up 56.8 152.6 Up 10:45:58 - 11:15:58 3220
Oroville 11:01:03 -31.2 Dark Up 56.9 152.4 Up 10:46:03 - 11:16:03 3216
Tonasket 11:01:01 -31.3 Dark Up 57.1 152.3 Up 10:46:01 - 11:16:01 3197
Okanogan 11:01:05 -31.5 Dark Up 57.4 151.8 Up 10:46:05 - 11:16:05 3173
Brewster 11:01:08 -31.8 Dark Up 57.5 151.3 Up 10:46:08 - 11:16:08 3156
Manson/Chelan 11:01:13 -32.1 Dark Up 57.6 150.5 Up 10:46:13 - 11:16:13 3150
Entiat 11:01:13 -32.2 Dark Up 57.8 150.2 Up 10:46:13 - 11:16:13 3133
Wenatchee 11:01:13 -32.4 Dark Up 58.0 149.9 Up 10:46:13 - 11:16:13 3115
Ellensburg 11:01:20 -32.7 Dark Up 58.3 149.2 Up 10:46:20 - 11:16:20 3087
Yakima 11:01:22 -32.9 Dark Up 58.6 148.9 Up 10:46:22 - 11:16:22 3054
Toppenish/White Swan 11:01:23 -32.9 Dark Up 58.8 149.0 Up 10:46:23 - 11:16:23 3030
Goldendale 11:01:28 -33.4 Dark Up 59.2 147.8 Up 10:46:28 - 11:16:28 2996
The Dalles 11:01:31 -33.7 Dark Up 59.2 147.0 Up 10:46:31 - 11:16:31 2988
Pasco 11:01:12 -32.2 Dark Up 59.4 151.0 Up 10:46:12 - 11:16:12 2982
George/Umatilla 11:01:17 -32.5 Dark Up 59.6 150.4 Up 10:46:17 - 11:16:17 2960
PNWRO 11:01:12 -32.2 Dark Up 59.7 151.2 Up 10:46:12 - 11:16:12 2954
Maupin 11:01:31 -33.9 Dark Up 59.6 146.8 Up 10:46:31 - 11:16:31 2949
Madras/Culver 11:01:34 -34.1 Dark Up 60.1 146.2 Up 10:46:34 - 11:16:34 2904
Sisters 11:01:42 -34.6 Dark Up 60.2 145.2 Up 10:46:42 - 11:16:42 2889
Redmond 11:01:40 -34.3 Dark Up 60.3 145.8 Up 10:46:40 - 11:16:40 2874
Bend 11:01:40 -34.5 Dark Up 60.5 145.4 Up 10:46:40 - 11:16:40 2860
Oregon Observatory 11:01:43 -34.7 Dark Up 60.6 145.0 Up 10:46:43 - 11:16:43 2850
La Pine/Gilchrist 11:01:45 -34.8 Dark Up 60.7 144.7 Up 10:46:45 - 11:16:45 2834
North Lake 11:01:42 -34.6 Dark Up 61.3 145.3 Up 10:46:42 - 11:16:42 2777
Chiloquin 11:01:54 -35.5 Dark Up 61.5 142.9 Up 10:46:54 - 11:16:54 2749
Paisley 11:01:41 -34.6 Dark Up 61.9 145.3 Up 10:46:41 - 11:16:41 2717
Klamath Falls 11:01:55 -35.6 Dark Up 61.8 142.7 Up 10:46:55 - 11:16:55 2716
Tulelake 11:01:56 -35.5 Dark Up 62.1 142.9 Up 10:46:56 - 11:16:56 2682
Lakeview 11:01:43 -34.7 Dark Up 62.4 145.1 Up 10:46:43 - 11:16:43 2666
Cedarville 11:01:47 -34.9 Dark Up 63.0 144.8 Up 10:46:47 - 11:16:47 2602
Fall River/Burney 11:01:59 -35.9 Dark Up 62.9 142.0 Up 10:46:59 - 11:16:59 2599
Susanville 11:01:57 -35.6 Dark Up 63.7 142.6 Up 10:46:57 - 11:16:57 2518
Greenville 11:02:01 -35.9 Dark Up 63.8 141.8 Up 10:47:01 - 11:17:01 2503
Gimple 11:02:00 -35.9 Dark Up 63.9 141.9 Up 10:47:00 - 11:17:00 2500
Quincy 11:01:59 -36.0 Dark Up 64.0 141.5 Up 10:46:59 - 11:16:59 2484
Portola 11:01:59 -35.7 Dark Up 64.3 142.2 Up 10:46:59 - 11:16:59 2457
Reno 11:01:56 -35.4 Dark Up 64.8 143.1 Up 10:46:56 - 11:16:56 2411
Carson City 11:01:56 -35.5 Dark Up 65.1 142.7 Up 10:46:56 - 11:16:56 2378
Gardnerville 11:01:58 -35.6 Dark Up 65.3 142.5 Up 10:46:58 - 11:16:58 2354
Yerington 11:01:51 -35.2 Dark Up 65.5 143.7 Up 10:46:51 - 11:16:51 2338
Hawthorne 11:01:50 -35.0 Dark Up 66.2 144.1 Up 10:46:50 - 11:16:50 2278
Lee Vining 11:01:58 -35.5 Dark Up 66.4 142.4 Up 10:46:58 - 11:16:58 2242
Tonopah 11:01:42 -34.1 Dark Up 67.2 146.4 Up 10:46:42 - 11:16:42 2187
Bishop 11:01:56 -35.2 Dark Up 67.2 143.1 Up 10:46:56 - 11:16:56 2162
Lone Pine 11:01:56 -35.2 Dark Up 68.0 142.7 Up 10:46:56 - 11:16:56 2079
Beatty 11:01:41 -34.2 Dark Up 68.3 145.9 Up 10:46:41 - 11:16:41 2063
CPSLO 11:02:24 -37.5 Dark Up 67.7 135.4 Up 10:47:24 - 11:17:24 2048
Niwot 10:59:52 -24.9 Dark Up 68.1 176.3 Up 10:44:52 - 11:14:52 2012
SwRI 10:59:54 -25.0 Dark Up 68.2 176.0 Up 10:44:54 - 11:14:54 2005
Indian Springs 11:01:36 -33.5 Dark Up 69.1 147.9 Up 10:46:36 - 11:16:36 1996
Henderson 11:01:31 -33.1 Dark Up 69.8 148.8 Up 10:46:31 - 11:16:31 1922
Searchlight/Boulder City 11:01:34 -33.2 Dark Up 70.3 148.1 Up 10:46:34 - 11:16:34 1865
Wildwood 11:02:13 -36.4 Dark Up 69.7 137.5 Up 10:47:13 - 11:17:13 1860
Laughlin/Bullhead City 11:01:33 -33.0 Dark Up 70.7 148.5 Up 10:46:33 - 11:16:33 1824
Patrick 11:01:26 -32.4 Dark Up 70.8 150.7 Up 10:46:26 - 11:16:26 1824
Kingman/Dolan Springs 11:01:29 -32.6 Dark Up 70.9 149.9 Up 10:46:29 - 11:16:29 1809
Mohave Valley 11:01:34 -33.1 Dark Up 71.0 148.2 Up 10:46:34 - 11:16:34 1798
DCO 11:01:22 -32.0 Dark Up 71.3 152.1 Up 10:46:22 - 11:16:22 1771
Idyllwild 11:01:58 -35.0 Dark Up 70.9 141.1 Up 10:46:58 - 11:16:58 1759
Lake Havasu City 11:01:34 -33.0 Dark Up 71.4 148.2 Up 10:46:34 - 11:16:34 1751
Parker 11:01:36 -33.1 Dark Up 71.7 147.7 Up 10:46:36 - 11:16:36 1716
Blythe 11:01:41 -33.4 Dark Up 72.0 146.1 Up 10:46:41 - 11:16:41 1675
Calipatria 11:01:50 -34.3 Dark Up 72.0 142.8 Up 10:46:50 - 11:16:50 1659
Yuma 11:01:45 -33.7 Dark Up 72.8 144.4 Up 10:46:45 - 11:16:45 1586

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 182222, (2020/10/10 11:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 11.39  44
Alnath         05:26:17.5 +28:36:23  1.6 10.36  30
111 Tau        05:24:25.7 +17:23:01  5.5  0.94  32
PPM 120901     05:23:30.6 +18:36:03  8.4  0.34  32
PPM 120880     05:22:17.5 +18:12:44  9.7  0.20  33
182222         05:23:06.6 +18:16:26 14.0        32
Positions are for J2000

Event circumstances last updated at 2019/01/29 03:52:21 UT

Marc W. Buie, Southwest Research Institute

RECON