RECON: TNO occultation with 12YG12

Event between 12YG12 and star GA0980:01258775 with event index number of 1561127

Geocentric closest approach at 2020/12/02 11:27:58 UTC

J2000 position of star is 06:03:26.0 +09:15:32
Equinox of date position of star is 06:04:30.2 +09:15:25
Stellar brightness G=14.6, use SENSEUP=128
Star is 16 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=22.1

[RECON map]
TNO is 33.7 AU from the Sun and 32.8 AU from the Earth.
The TNO is moving 23.6 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 253 seconds.
The 1-sigma cross-track error in the shadow position is 3315 km.
The sky-plane scale is 23823.5 km/arcsec.

The TNO has an absolute magnitude Hv=6.8
Diameter=258.2 km assuming a 5% albedo -- 10.9 sec chord
Diameter=105.4 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 12YG12, (2020/12/02 11:28UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:18.3 +07:24:33  0.4  2.76  18
Bellatrix      05:26:15.3 +06:22:01  1.6  9.92  22
PPM 121823     06:04:34.9 +11:40:43  6.0  2.42  13
PPM 149823     06:04:27.2 +09:09:29  8.3  0.10  16
12YG12         06:04:34.9 +09:15:25 14.6        16
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 3.6 sigma about the mid-time.
The median site spacing is 21.7 km RECON observability=1.0 and success probability=9.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 11:26:24 -39.1 Dark Up 41.0 225.6 Up 11:11:24 - 11:41:24 4210
Summerland 11:26:25 -39.4 Dark Up 41.3 225.4 Up 11:11:25 - 11:41:25 4184
Penticton 11:26:25 -39.3 Dark Up 41.3 225.6 Up 11:11:25 - 11:41:25 4179
Okanagan Falls 11:26:24 -39.4 Dark Up 41.4 225.7 Up 11:11:24 - 11:41:24 4163
Oliver 11:26:24 -39.4 Dark Up 41.5 225.8 Up 11:11:24 - 11:41:24 4150
Anarchist Mountain Observatory 11:26:23 -39.3 Dark Up 41.6 226.2 Up 11:11:23 - 11:41:23 4137
Oroville 11:26:23 -39.4 Dark Up 41.7 226.1 Up 11:11:23 - 11:41:23 4130
Tonasket 11:26:23 -39.4 Dark Up 41.8 226.3 Up 11:11:23 - 11:41:23 4111
Okanogan 11:26:22 -39.6 Dark Up 42.1 226.3 Up 11:11:22 - 11:41:22 4082
Brewster 11:26:22 -39.8 Dark Up 42.4 226.3 Up 11:11:22 - 11:41:22 4058
Manson/Chelan 11:26:23 -40.0 Dark Up 42.7 226.0 Up 11:11:23 - 11:41:23 4038
Wenatchee 11:26:23 -40.3 Dark Up 43.1 226.1 Up 11:11:23 - 11:41:23 3996
Ellensburg 11:26:22 -40.5 Dark Up 43.5 226.1 Up 11:11:22 - 11:41:22 3959
Yakima 11:26:21 -40.6 Dark Up 43.8 226.4 Up 11:11:21 - 11:41:21 3924
Toppenish/White Swan 11:26:21 -40.5 Dark Up 43.9 226.7 Up 11:11:21 - 11:41:21 3907
Pasco 11:26:17 -39.7 Dark Up 43.3 228.3 Up 11:11:17 - 11:41:17 3905
PNWRO 11:26:16 -39.5 Dark Up 43.4 228.7 Up 11:11:16 - 11:41:16 3886
George/Umatilla 11:26:17 -39.9 Dark Up 43.7 228.2 Up 11:11:17 - 11:41:17 3875
Goldendale 11:26:21 -40.9 Dark Up 44.5 226.6 Up 11:11:21 - 11:41:21 3856
The Dalles 11:26:21 -41.2 Dark Up 44.8 226.3 Up 11:11:21 - 11:41:21 3834
Maupin 11:26:21 -41.2 Dark Up 45.1 226.7 Up 11:11:21 - 11:41:21 3798
Madras/Culver 11:26:20 -41.3 Dark Up 45.5 227.1 Up 11:11:20 - 11:41:20 3749
Redmond 11:26:19 -41.4 Dark Up 45.7 227.3 Up 11:11:19 - 11:41:19 3717
Sisters 11:26:20 -41.7 Dark Up 45.9 226.8 Up 11:11:20 - 11:41:20 3716
Bend 11:26:19 -41.5 Dark Up 45.9 227.3 Up 11:11:19 - 11:41:19 3697
Oregon Observatory 11:26:19 -41.7 Dark Up 46.1 227.3 Up 11:11:19 - 11:41:19 3681
La Pine/Gilchrist 11:26:20 -41.7 Dark Up 46.3 227.4 Up 11:11:20 - 11:41:20 3662
North Lake 11:26:17 -41.4 Dark Up 46.3 228.4 Up 11:11:17 - 11:41:17 3627
Paisley 11:26:14 -41.2 Dark Up 46.4 229.3 Up 11:11:14 - 11:41:14 3580
Chiloquin 11:26:18 -42.2 Dark Up 47.3 227.8 Up 11:11:18 - 11:41:18 3559
Lakeview 11:26:13 -41.1 Dark Up 46.7 229.9 Up 11:11:13 - 11:41:13 3535
Klamath Falls 11:26:18 -42.1 Dark Up 47.4 228.2 Up 11:11:18 - 11:41:18 3528
Tulelake 11:26:17 -42.0 Dark Up 47.5 228.7 Up 11:11:17 - 11:41:17 3506
Cedarville 11:26:12 -41.1 Dark Up 47.0 230.6 Up 11:11:12 - 11:41:12 3477
SwRI 11:25:28 -29.9 Dark Up 38.2 246.8 Up 11:10:28 - 11:40:28 3473
Fall River/Burney 11:26:14 -42.0 Dark Up 48.0 229.6 Up 11:11:14 - 11:41:14 3423
Susanville 11:26:11 -41.5 Dark Up 48.0 231.0 Up 11:11:11 - 11:41:11 3370
Gimple 11:26:12 -41.7 Dark Up 48.3 231.0 Up 11:11:12 - 11:41:12 3343
Greenville 11:26:12 -41.8 Dark Up 48.3 230.9 Up 11:11:12 - 11:41:12 3342
Quincy 11:26:11 -41.8 Dark Up 48.5 231.1 Up 11:11:11 - 11:41:11 3323
Portola 11:26:10 -41.5 Dark Up 48.3 231.7 Up 11:11:10 - 11:41:10 3315
Reno 11:26:07 -41.0 Dark Up 48.0 232.7 Up 11:11:07 - 11:41:07 3295
Carson City 11:26:07 -41.0 Dark Up 48.2 233.1 Up 11:11:07 - 11:41:07 3262
Yerington 11:26:04 -40.5 Dark Up 48.0 233.9 Up 11:11:04 - 11:41:04 3249
Gardnerville 11:26:06 -41.0 Dark Up 48.4 233.3 Up 11:11:06 - 11:41:06 3239
Hawthorne 11:26:02 -40.1 Dark Up 47.9 234.9 Up 11:11:02 - 11:41:02 3209
Tonopah 11:25:57 -39.1 Dark Up 47.3 236.9 Up 11:10:57 - 11:40:57 3177
Lee Vining 11:26:03 -40.5 Dark Up 48.5 234.9 Up 11:11:03 - 11:41:03 3151
Bishop 11:26:00 -40.0 Dark Up 48.4 236.3 Up 11:11:00 - 11:41:00 3100
Beatty 11:25:54 -38.7 Dark Up 47.6 238.4 Up 11:10:54 - 11:40:54 3070
Indian Springs 11:25:50 -37.9 Dark Up 47.0 239.9 Up 11:10:50 - 11:40:50 3048
Lone Pine 11:25:58 -39.8 Dark Up 48.6 237.3 Up 11:10:58 - 11:40:58 3030
Henderson 11:25:47 -37.3 Dark Up 46.8 241.1 Up 11:10:47 - 11:40:47 3003
Patrick 11:25:42 -36.4 Dark Up 46.3 242.7 Up 11:10:42 - 11:40:42 2953
Searchlight/Boulder City 11:25:46 -37.2 Dark Up 47.0 241.6 Up 11:10:46 - 11:40:46 2948
Kingman/Dolan Springs 11:25:43 -36.5 Dark Up 46.5 242.7 Up 11:10:43 - 11:40:43 2930
Laughlin/Bullhead City 11:25:44 -36.9 Dark Up 46.9 242.3 Up 11:10:44 - 11:40:44 2923
Mohave Valley 11:25:44 -36.9 Dark Up 47.0 242.5 Up 11:10:44 - 11:40:44 2896
CPSLO 11:26:03 -41.9 Dark Up 51.1 235.8 Up 11:11:03 - 11:41:03 2882
Lake Havasu City 11:25:42 -36.7 Dark Up 47.1 243.2 Up 11:10:42 - 11:40:42 2859
Parker 11:25:42 -36.7 Dark Up 47.2 243.5 Up 11:10:42 - 11:40:42 2825
Wildwood 11:25:55 -40.2 Dark Up 50.3 239.2 Up 11:10:55 - 11:40:55 2780
Blythe 11:25:42 -36.9 Dark Up 47.6 243.7 Up 11:10:42 - 11:40:42 2770
Idyllwild 11:25:48 -38.6 Dark Up 49.1 241.6 Up 11:10:48 - 11:40:48 2762
Calipatria 11:25:44 -37.6 Dark Up 48.6 243.3 Up 11:10:44 - 11:40:44 2713
Yuma 11:25:41 -36.9 Dark Up 48.1 244.6 Up 11:10:41 - 11:40:41 2678

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 12YG12, (2020/12/02 11:28UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  2.76  18
Bellatrix      05:25:07.8 +06:20:58  1.6  9.92  22
PPM 121823     06:03:24.8 +11:40:51  6.0  2.42  13
PPM 149823     06:03:18.3 +09:09:37  8.3  0.10  16
12YG12         06:03:26.0 +09:15:32 14.6        16
Positions are for J2000

Event circumstances last updated at 2019/07/02 21:54:03 UT

Marc W. Buie, Southwest Research Institute

RECON