RECON: TNO occultation with 99XY143

Event between 99XY143 and star GA1080:02612376 with event index number of 1223743

Geocentric closest approach at 2022/12/19 10:20:37 UTC

J2000 position of star is 07:03:57.2 +19:00:21
Equinox of date position of star is 07:05:11.2 +18:58:24
Stellar brightness G=13.8, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 109 degrees from the moon. Moon is 20% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 45.0 AU from the Sun and 44.1 AU from the Earth.
The TNO is moving 24.6 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 372 seconds.
The 1-sigma cross-track error in the shadow position is 2587 km.
The sky-plane scale is 31993.8 km/arcsec.

The TNO has an absolute magnitude Hv=6.2
Diameter=351.6 km assuming a 5% albedo -- 14.3 sec chord
Diameter=143.5 km assuming a 30% albedo -- 5.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 99XY143, (2022/12/19 10:21UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.2 +27:58:08  1.1 13.07 100
Alhena         06:39:02.3 +16:22:40  1.9  6.77 115
45 Gem         07:09:41.0 +15:53:31  6.4  3.25 107
PPM 123451     07:04:50.6 +19:11:11  7.8  0.24 109
PPM 123471     07:05:45.9 +18:48:38  9.3  0.19 109
99XY143        07:05:18.0 +18:58:13 13.8       108
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 2.4 sigma about the mid-time.
The median site spacing is 26.2 km RECON observability=1.0 and success probability=12.4%
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 10:19:57 -51.0 Dark Down 55.7 210.7 Up 10:04:57 - 10:34:57 4042
Kelowna 10:19:57 -51.3 Dark Down 56.1 210.7 Up 10:04:57 - 10:34:57 4004
Peachland 10:19:57 -51.5 Dark Down 56.3 210.3 Up 10:04:57 - 10:34:57 3991
Summerland 10:19:57 -51.6 Dark Down 56.4 210.6 Up 10:04:57 - 10:34:57 3978
Penticton 10:19:56 -51.5 Dark Down 56.4 210.8 Up 10:04:56 - 10:34:56 3973
Oliver 10:19:56 -51.7 Dark Down 56.7 211.1 Up 10:04:56 - 10:34:56 3940
Anarchist Mountain Observatory 10:19:55 -51.7 Dark Down 56.8 211.5 Up 10:04:55 - 10:34:55 3927
Tonasket 10:19:55 -51.9 Dark Down 57.1 211.7 Up 10:04:55 - 10:34:55 3897
Okanogan 10:19:55 -52.1 Dark Down 57.4 211.7 Up 10:04:55 - 10:34:55 3864
Brewster 10:19:55 -52.4 Dark Down 57.7 211.6 Up 10:04:55 - 10:34:55 3836
Victoria 10:20:06 -54.2 Dark Down 58.5 205.2 Up 10:05:06 - 10:35:06 3836
Manson/Chelan 10:19:55 -52.7 Dark Down 58.0 211.2 Up 10:04:55 - 10:34:55 3812
Wenatchee 10:19:56 -53.0 Dark Down 58.5 211.3 Up 10:04:56 - 10:34:56 3765
Ellensburg 10:19:56 -53.3 Dark Down 58.9 211.3 Up 10:04:56 - 10:34:56 3723
Yakima 10:19:56 -53.5 Dark Down 59.3 211.6 Up 10:04:56 - 10:34:56 3684
Pasco 10:19:51 -52.8 Dark Down 59.0 214.3 Up 10:04:51 - 10:34:51 3669
Toppenish/White Swan 10:19:55 -53.5 Dark Down 59.4 212.1 Up 10:04:55 - 10:34:55 3665
PNWRO 10:19:50 -52.8 Dark Down 59.2 214.9 Up 10:04:50 - 10:34:50 3648
Goldendale 10:19:56 -54.0 Dark Down 60.0 211.8 Up 10:04:56 - 10:34:56 3607
The Dalles 10:19:56 -54.4 Dark Down 60.4 211.4 Up 10:04:56 - 10:34:56 3581
Maupin 10:19:55 -54.5 Dark Down 60.7 212.0 Up 10:04:55 - 10:34:55 3542
Redmond 10:19:55 -54.9 Dark Down 61.5 212.7 Up 10:04:55 - 10:34:55 3452
Sisters 10:19:56 -55.2 Dark Down 61.6 211.9 Up 10:04:56 - 10:34:56 3450
Bend 10:19:55 -55.1 Dark Down 61.7 212.6 Up 10:04:55 - 10:34:55 3430
Oregon Observatory 10:19:55 -55.3 Dark Down 61.9 212.6 Up 10:04:55 - 10:34:55 3411
La Pine/Gilchrist 10:19:55 -55.4 Dark Down 62.1 212.7 Up 10:04:55 - 10:34:55 3390
North Lake 10:19:53 -55.2 Dark Down 62.2 214.2 Up 10:04:53 - 10:34:53 3355
Dunrhomin 10:19:01 -44.7 Dark Up 55.6 241.3 Up 10:04:01 - 10:34:01 3311
Paisley 10:19:51 -55.2 Dark Down 62.5 215.5 Up 10:04:51 - 10:34:51 3305
Lakeview 10:19:50 -55.2 Dark Down 62.9 216.4 Up 10:04:50 - 10:34:50 3257
Klamath Falls 10:19:55 -56.2 Dark Down 63.4 213.7 Up 10:04:55 - 10:34:55 3243
Cedarville 10:19:49 -55.3 Dark Down 63.3 217.5 Up 10:04:49 - 10:34:49 3194
Fall River/Burney 10:19:52 -56.4 Dark Down 64.3 215.8 Up 10:04:52 - 10:34:52 3129
Susanville 10:19:48 -56.1 Dark Down 64.4 218.0 Up 10:04:48 - 10:34:48 3076
Gimple 10:19:49 -56.3 Dark Down 64.7 217.9 Up 10:04:49 - 10:34:49 3045
Greenville 10:19:50 -56.4 Dark Down 64.8 217.8 Up 10:04:50 - 10:34:50 3044
Quincy 10:19:49 -56.4 Dark Down 64.9 218.0 Up 10:04:49 - 10:34:49 3023
Portola 10:19:48 -56.1 Dark Down 64.8 219.1 Up 10:04:48 - 10:34:48 3017
Reno 10:19:45 -55.7 Dark Down 64.7 220.7 Up 10:04:45 - 10:34:45 2999
Carson City 10:19:45 -55.8 Dark Down 65.0 221.2 Up 10:04:45 - 10:34:45 2963
Yerington 10:19:43 -55.4 Dark Down 64.8 222.7 Up 10:04:43 - 10:34:43 2952
Gardnerville 10:19:45 -55.9 Dark Down 65.1 221.6 Up 10:04:45 - 10:34:45 2938
Hawthorne 10:19:40 -55.1 Dark Down 64.8 224.3 Up 10:04:40 - 10:34:40 2912
Tonopah 10:19:35 -54.2 Dark Down 64.4 227.5 Up 10:04:35 - 10:34:35 2885
Lee Vining 10:19:41 -55.7 Dark Down 65.5 224.2 Up 10:04:41 - 10:34:41 2847
Bishop 10:19:38 -55.2 Dark Down 65.5 226.5 Up 10:04:38 - 10:34:38 2796
Beatty 10:19:32 -54.1 Dark Down 64.9 230.1 Up 10:04:32 - 10:34:32 2773
Indian Springs 10:19:28 -53.3 Dark Down 64.4 232.4 Up 10:04:28 - 10:34:28 2757
Henderson 10:19:25 -52.8 Dark Down 64.3 234.3 Up 10:04:25 - 10:34:25 2713
Patrick 10:19:21 -52.0 Dark Down 63.9 237.1 Up 10:04:21 - 10:34:21 2667
Kingman/Dolan Springs 10:19:21 -52.2 Dark Down 64.2 237.2 Up 10:04:21 - 10:34:21 2641
Laughlin/Bullhead City 10:19:22 -52.6 Dark Down 64.5 236.5 Up 10:04:22 - 10:34:22 2630
Mohave Valley 10:19:22 -52.7 Dark Down 64.7 236.9 Up 10:04:22 - 10:34:22 2602
Lake Havasu City 10:19:21 -52.5 Dark Down 64.7 238.0 Up 10:04:21 - 10:34:21 2564
CPSLO 10:19:44 -57.5 Dark Down 68.3 225.7 Up 10:04:44 - 10:34:44 2551
Parker 10:19:21 -52.5 Dark Down 64.9 238.7 Up 10:04:21 - 10:34:21 2528
George/Scottsdale 10:19:11 -50.6 Dark Up 63.3 242.8 Up 10:04:11 - 10:34:11 2527
Blythe 10:19:21 -52.8 Dark Down 65.4 239.2 Up 10:04:21 - 10:34:21 2469
Wildwood 10:19:35 -56.0 Dark Down 67.8 231.8 Up 10:04:35 - 10:34:35 2454
Idyllwild 10:19:28 -54.5 Dark Down 66.8 235.7 Up 10:04:28 - 10:34:28 2446
Calipatria 10:19:24 -53.6 Dark Down 66.3 238.8 Up 10:04:24 - 10:34:24 2402
Yuma 10:19:20 -52.9 Dark Down 65.9 240.9 Up 10:04:20 - 10:34:20 2372

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 99XY143, (2022/12/19 10:21UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 13.07 100
Alhena         06:37:42.8 +16:23:57  1.9  6.77 115
45 Gem         07:08:22.0 +15:55:48  6.4  3.25 107
PPM 123451     07:03:29.7 +19:13:18  7.8  0.24 109
PPM 123471     07:04:25.2 +18:50:47  9.3  0.19 109
99XY143        07:03:57.2 +19:00:21 13.8       109
Positions are for J2000

Event circumstances last updated at 2021/01/13 22:37:58 UT

Marc W. Buie, Southwest Research Institute

RECON