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 10:10:04 UTC

J2000 position of star is 07:03:57.2 +19:00:21
Equinox of date position of star is 07:05:07.9 +18:58:29
Stellar brightness G=13.8, use SENSEUP=64
Star is 109 degrees from the moon. Moon is 21% illuminated.
TNO apparent brightness V=26.5

[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 395 seconds.
The 1-sigma cross-track error in the shadow position is 2750 km.
The sky-plane scale is 31994.4 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=358.1 km assuming a 5% albedo -- 2.5 sec chord
Diameter=146.2 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 99XY143, (2022/12/19 10:10UT)
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  0.19 108
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 2.3 sigma about the mid-time.
The median site spacing is 25.1 km RECON observability=1.0 and success probability=15.0%
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 10:09:32 -52.5 Dark Down 56.5 206.5 Up 09:54:32 - 10:24:32 2854
Peachland 10:09:32 -53.0 Dark Down 57.1 206.1 Up 09:54:32 - 10:24:32 2803
Summerland 10:09:32 -53.0 Dark Down 57.2 206.3 Up 09:54:32 - 10:24:32 2790
Penticton 10:09:31 -53.0 Dark Down 57.2 206.6 Up 09:54:31 - 10:24:31 2785
Oliver 10:09:31 -53.2 Dark Down 57.6 206.8 Up 09:54:31 - 10:24:31 2752
Anarchist Mountain Observatory 10:09:30 -53.2 Dark Down 57.7 207.3 Up 09:54:30 - 10:24:30 2738
Tonasket 10:09:31 -53.4 Dark Down 57.9 207.4 Up 09:54:31 - 10:24:31 2708
Okanogan 10:09:31 -53.6 Dark Down 58.3 207.4 Up 09:54:31 - 10:24:31 2675
Victoria 10:09:41 -55.6 Dark Down 59.2 200.6 Up 09:54:41 - 10:24:41 2651
Brewster 10:09:31 -53.9 Dark Down 58.6 207.2 Up 09:54:31 - 10:24:31 2647
Manson/Chelan 10:09:31 -54.2 Dark Down 58.9 206.7 Up 09:54:31 - 10:24:31 2623
Entiat 10:09:31 -54.4 Dark Down 59.1 206.8 Up 09:54:31 - 10:24:31 2601
Wenatchee 10:09:31 -54.5 Dark Down 59.4 206.8 Up 09:54:31 - 10:24:31 2576
Ellensburg 10:09:31 -54.9 Dark Down 59.8 206.7 Up 09:54:31 - 10:24:31 2534
Yakima 10:09:31 -55.1 Dark Down 60.2 207.0 Up 09:54:31 - 10:24:31 2495
Pasco 10:09:26 -54.4 Dark Down 60.0 209.8 Up 09:54:26 - 10:24:26 2478
Toppenish/White Swan 10:09:30 -55.1 Dark Down 60.3 207.5 Up 09:54:30 - 10:24:30 2476
PNWRO 10:09:25 -54.4 Dark Down 60.1 210.4 Up 09:54:25 - 10:24:25 2457
Goldendale 10:09:31 -55.6 Dark Down 60.9 207.2 Up 09:54:31 - 10:24:31 2418
The Dalles 10:09:32 -56.0 Dark Down 61.3 206.7 Up 09:54:32 - 10:24:32 2392
Maupin 10:09:31 -56.1 Dark Down 61.6 207.2 Up 09:54:31 - 10:24:31 2352
Redmond 10:09:31 -56.6 Dark Down 62.4 207.8 Up 09:54:31 - 10:24:31 2263
Sisters 10:09:32 -56.8 Dark Down 62.5 207.0 Up 09:54:32 - 10:24:32 2261
Bend 10:09:31 -56.8 Dark Down 62.7 207.7 Up 09:54:31 - 10:24:31 2240
Oregon Observatory 10:09:31 -57.0 Dark Down 62.9 207.7 Up 09:54:31 - 10:24:31 2222
La Pine/Gilchrist 10:09:31 -57.1 Dark Down 63.1 207.7 Up 09:54:31 - 10:24:31 2201
North Lake 10:09:29 -56.9 Dark Down 63.2 209.3 Up 09:54:29 - 10:24:29 2165
Paisley 10:09:27 -56.9 Dark Down 63.6 210.5 Up 09:54:27 - 10:24:27 2114
Niwot 10:08:36 -46.7 Dark Up 57.4 238.2 Up 09:53:36 - 10:23:36 2088
SwRI 10:08:36 -46.8 Dark Up 57.5 238.3 Up 09:53:36 - 10:23:36 2076
Lakeview 10:09:26 -57.0 Dark Down 64.0 211.4 Up 09:54:26 - 10:24:26 2065
Klamath Falls 10:09:31 -57.9 Dark Down 64.4 208.6 Up 09:54:31 - 10:24:31 2053
Cedarville 10:09:25 -57.1 Dark Down 64.4 212.5 Up 09:54:25 - 10:24:25 2002
Fall River/Burney 10:09:28 -58.2 Dark Down 65.3 210.6 Up 09:54:28 - 10:24:28 1938
Susanville 10:09:25 -57.9 Dark Down 65.6 212.8 Up 09:54:25 - 10:24:25 1883
Gimple 10:09:26 -58.2 Dark Down 65.9 212.7 Up 09:54:26 - 10:24:26 1853
Greenville 10:09:26 -58.2 Dark Down 65.9 212.5 Up 09:54:26 - 10:24:26 1852
Quincy 10:09:26 -58.3 Dark Down 66.1 212.8 Up 09:54:26 - 10:24:26 1831
Portola 10:09:24 -58.0 Dark Down 66.0 213.9 Up 09:54:24 - 10:24:24 1824
Reno 10:09:22 -57.6 Dark Down 65.9 215.6 Up 09:54:22 - 10:24:22 1805
Carson City 10:09:21 -57.7 Dark Down 66.2 216.1 Up 09:54:21 - 10:24:21 1769
Yerington 10:09:19 -57.3 Dark Down 66.1 217.6 Up 09:54:19 - 10:24:19 1757
Gardnerville 10:09:21 -57.8 Dark Down 66.4 216.5 Up 09:54:21 - 10:24:21 1745
Hawthorne 10:09:17 -57.1 Dark Down 66.2 219.3 Up 09:54:17 - 10:24:17 1716
Tonopah 10:09:12 -56.2 Dark Down 65.8 222.7 Up 09:54:12 - 10:24:12 1688
Lee Vining 10:09:18 -57.6 Dark Down 66.9 219.2 Up 09:54:18 - 10:24:18 1652
Bishop 10:09:15 -57.2 Dark Down 67.0 221.5 Up 09:54:15 - 10:24:15 1600
Beatty 10:09:09 -56.1 Dark Down 66.4 225.4 Up 09:54:09 - 10:24:09 1575
Indian Springs 10:09:05 -55.3 Dark Down 66.0 227.9 Up 09:54:05 - 10:24:05 1557
Henderson 10:09:02 -54.9 Dark Down 66.0 230.0 Up 09:54:02 - 10:24:02 1512
Patrick 10:08:57 -54.1 Dark Down 65.6 233.0 Up 09:53:57 - 10:23:57 1465
Searchlight/Boulder City 10:09:01 -55.0 Dark Down 66.3 231.1 Up 09:54:01 - 10:24:01 1454
DCO 10:08:54 -53.6 Dark Down 65.4 234.7 Up 09:53:54 - 10:23:54 1445
Kingman/Dolan Springs 10:08:58 -54.3 Dark Down 65.9 233.1 Up 09:53:58 - 10:23:58 1439
Laughlin/Bullhead City 10:08:59 -54.7 Dark Down 66.3 232.3 Up 09:53:59 - 10:23:59 1428
Mohave Valley 10:08:59 -54.8 Dark Down 66.4 232.8 Up 09:53:59 - 10:23:59 1400
Lake Havasu City 10:08:58 -54.6 Dark Down 66.5 233.9 Up 09:53:58 - 10:23:58 1362
CPSLO 10:09:21 -59.5 Dark Down 69.7 220.1 Up 09:54:21 - 10:24:21 1356
Parker 10:08:58 -54.7 Dark Down 66.7 234.6 Up 09:53:58 - 10:23:58 1326
George/Scottsdale 10:08:48 -52.7 Dark Down 65.2 239.2 Up 09:53:48 - 10:23:48 1322
Blythe 10:08:57 -55.0 Dark Down 67.2 235.1 Up 09:53:57 - 10:23:57 1266
Wildwood 10:09:12 -58.1 Dark Down 69.4 226.8 Up 09:54:12 - 10:24:12 1257
Idyllwild 10:09:05 -56.7 Dark Down 68.5 231.2 Up 09:54:05 - 10:24:05 1246
Calipatria 10:09:00 -55.8 Dark Down 68.1 234.5 Up 09:54:00 - 10:24:00 1200
Yuma 10:08:57 -55.1 Dark Down 67.7 236.9 Up 09:53:57 - 10:23:57 1169

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 10:10UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +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  0.19 108
99XY143        07:03:57.2 +19:00:21 13.8       109
Positions are for J2000

Event circumstances last updated at 2020/02/06 19:27:28 UT

Marc W. Buie, Southwest Research Institute

RECON