RECON: TNO occultation with 99XY143

Event between 99XY143 and star GA1080:02678252 with event index number of 1312305

Geocentric closest approach at 2023/11/24 11:20:06 UTC

J2000 position of star is 07:10:31.2 +18:43:32
Equinox of date position of star is 07:11:41.7 +18:41:30
Stellar brightness G=15.4, use SENSEUP=128
Star is 82 degrees from the moon. Moon is 90% illuminated.
TNO apparent brightness V=26.6

[RECON map]
TNO is 45.1 AU from the Sun and 44.4 AU from the Earth.
The TNO is moving 17.3 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 696 seconds.
The 1-sigma cross-track error in the shadow position is 4552 km.
The sky-plane scale is 32206.8 km/arcsec.

The TNO has an absolute magnitude Hv=10.0
Diameter=358.1 km assuming a 5% albedo -- 3.5 sec chord
Diameter=146.2 km assuming a 30% albedo -- 1.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 99XY143, (2023/11/24 11:20UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:46.7 +27:58:00  1.1 12.25  89
Alhena         06:39:05.5 +16:22:37  1.9  8.16  75
51 Gem         07:14:44.5 +16:06:59  5.0  2.66  83
PPM 123630     07:11:19.4 +18:48:13  7.6  0.18  82
99XY143        07:11:55.0 +18:41:06 15.4        82
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 1.3 sigma about the mid-time.
The median site spacing is 25.1 km RECON observability=1.0 and success probability=7.5%
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 11:19:46 -38.4 Dark Up 58.1 191.1 Up 11:04:46 - 11:34:46 -4680
Peachland 11:19:49 -38.9 Dark Up 58.6 190.5 Up 11:04:49 - 11:34:49 -4729
Summerland 11:19:48 -38.8 Dark Up 58.8 190.7 Up 11:04:48 - 11:34:48 -4743
Penticton 11:19:48 -38.8 Dark Up 58.8 190.9 Up 11:04:48 - 11:34:48 -4749
Oliver 11:19:48 -38.9 Dark Up 59.2 191.0 Up 11:04:48 - 11:34:48 -4782
Anarchist Mountain Observatory 11:19:47 -38.8 Dark Up 59.3 191.4 Up 11:04:47 - 11:34:47 -4798
Tonasket 11:19:47 -38.9 Dark Up 59.6 191.4 Up 11:04:47 - 11:34:47 -4828
Victoria 11:20:04 -41.4 Dark Up 60.2 184.1 Up 11:05:04 - 11:35:04 -4857
Okanogan 11:19:46 -39.1 Dark Up 60.0 191.2 Up 11:04:46 - 11:34:46 -4861
Brewster 11:19:48 -39.3 Dark Up 60.3 190.9 Up 11:04:48 - 11:34:48 -4888
Manson/Chelan 11:19:49 -39.6 Dark Up 60.5 190.3 Up 11:04:49 - 11:34:49 -4909
Entiat 11:19:49 -39.7 Dark Up 60.7 190.2 Up 11:04:49 - 11:34:49 -4931
Wenatchee 11:19:49 -39.8 Dark Up 61.0 190.1 Up 11:04:49 - 11:34:49 -4956
Ellensburg 11:19:51 -40.0 Dark Up 61.4 189.8 Up 11:04:51 - 11:34:51 -4997
Yakima 11:19:51 -40.1 Dark Up 61.8 189.9 Up 11:04:51 - 11:34:51 -5037
Toppenish/White Swan 11:19:49 -40.1 Dark Up 62.0 190.3 Up 11:04:49 - 11:34:49 -5057
Pasco 11:19:44 -39.2 Dark Up 62.0 192.9 Up 11:04:44 - 11:34:44 -5065
PNWRO 11:19:42 -39.1 Dark Up 62.2 193.4 Up 11:04:42 - 11:34:42 -5088
Goldendale 11:19:51 -40.5 Dark Up 62.6 189.7 Up 11:04:51 - 11:34:51 -5113
The Dalles 11:19:52 -40.8 Dark Up 62.9 189.0 Up 11:04:52 - 11:34:52 -5137
Maupin 11:19:51 -40.8 Dark Up 63.3 189.3 Up 11:04:51 - 11:34:51 -5178
Sisters 11:19:54 -41.3 Dark Up 64.2 188.6 Up 11:04:54 - 11:34:54 -5267
Redmond 11:19:52 -41.0 Dark Up 64.2 189.4 Up 11:04:52 - 11:34:52 -5268
Bend 11:19:52 -41.2 Dark Up 64.4 189.2 Up 11:04:52 - 11:34:52 -5290
Oregon Observatory 11:19:52 -41.3 Dark Up 64.6 189.0 Up 11:04:52 - 11:34:52 -5307
La Pine/Gilchrist 11:19:53 -41.4 Dark Up 64.8 188.9 Up 11:04:53 - 11:34:53 -5328
North Lake 11:19:51 -41.0 Dark Up 65.2 190.4 Up 11:04:51 - 11:34:51 -5370
Paisley 11:19:48 -40.9 Dark Up 65.7 191.4 Up 11:04:48 - 11:34:48 -5425
Lakeview 11:19:47 -40.8 Dark Up 66.1 192.1 Up 11:04:47 - 11:34:47 -5475
Klamath Falls 11:19:53 -41.8 Dark Up 66.3 188.8 Up 11:04:53 - 11:34:53 -5476
Cedarville 11:19:46 -40.8 Dark Up 66.8 192.8 Up 11:04:46 - 11:34:46 -5542
Niwot 11:18:35 -29.8 Dark Down 62.6 224.7 Up 11:03:35 - 11:33:35 -5580
SwRI 11:18:35 -29.8 Dark Down 62.7 224.7 Up 11:03:35 - 11:33:35 -5592
Fall River/Burney 11:19:52 -41.8 Dark Up 67.4 190.1 Up 11:04:52 - 11:34:52 -5596
Susanville 11:19:48 -41.3 Dark Up 67.9 192.2 Up 11:04:48 - 11:34:48 -5658
Gimple 11:19:48 -41.5 Dark Up 68.2 191.9 Up 11:04:48 - 11:34:48 -5687
Greenville 11:19:50 -41.6 Dark Up 68.2 191.7 Up 11:04:50 - 11:34:50 -5687
Quincy 11:19:49 -41.6 Dark Up 68.4 191.8 Up 11:04:49 - 11:34:49 -5708
Portola 11:19:47 -41.2 Dark Up 68.5 193.0 Up 11:04:47 - 11:34:47 -5719
Reno 11:19:43 -40.8 Dark Up 68.6 194.8 Up 11:04:43 - 11:34:43 -5744
Carson City 11:19:43 -40.8 Dark Up 69.0 195.1 Up 11:04:43 - 11:34:43 -5782
Yerington 11:19:40 -40.3 Dark Up 69.0 196.8 Up 11:04:40 - 11:34:40 -5799
Gardnerville 11:19:44 -40.8 Dark Up 69.2 195.4 Up 11:04:44 - 11:34:44 -5807
Hawthorne 11:19:37 -40.0 Dark Up 69.3 198.5 Up 11:04:37 - 11:34:37 -5845
Tonopah 11:19:29 -38.9 Dark Up 69.4 202.5 Up 11:04:29 - 11:34:29 -5887
Lee Vining 11:19:40 -40.4 Dark Up 70.0 197.8 Up 11:04:40 - 11:34:40 -5906
Bishop 11:19:35 -39.9 Dark Up 70.4 200.2 Up 11:04:35 - 11:34:35 -5966
Beatty 11:19:27 -38.6 Dark Up 70.3 205.0 Up 11:04:27 - 11:34:27 -6006
Indian Springs 11:19:21 -37.8 Dark Up 70.2 208.1 Up 11:04:21 - 11:34:21 -6034
Henderson 11:19:18 -37.3 Dark Up 70.4 210.6 Up 11:04:18 - 11:34:18 -6086
Patrick 11:19:12 -36.4 Dark Up 70.5 214.3 Up 11:04:12 - 11:34:12 -6144
Searchlight/Boulder City 11:19:16 -37.2 Dark Up 70.9 211.6 Up 11:04:16 - 11:34:16 -6146
Kingman/Dolan Springs 11:19:13 -36.5 Dark Up 70.7 214.2 Up 11:04:13 - 11:34:13 -6169
DCO 11:19:08 -35.8 Dark Down 70.4 216.5 Up 11:04:08 - 11:34:08 -6171
Laughlin/Bullhead City 11:19:15 -36.9 Dark Up 71.0 212.9 Up 11:04:15 - 11:34:15 -6175
CPSLO 11:19:46 -41.8 Dark Up 72.9 195.7 Up 11:04:46 - 11:34:46 -6193
Mohave Valley 11:19:15 -36.9 Dark Up 71.2 213.4 Up 11:04:15 - 11:34:15 -6204
Lake Havasu City 11:19:13 -36.7 Dark Up 71.4 214.7 Up 11:04:13 - 11:34:13 -6245
Parker 11:19:13 -36.7 Dark Up 71.7 215.3 Up 11:04:13 - 11:34:13 -6282
George/Scottsdale 11:19:00 -34.7 Dark Down 70.8 222.0 Up 11:04:00 - 11:34:00 -6309
Wildwood 11:19:34 -40.2 Dark Up 73.5 203.3 Up 11:04:34 - 11:34:34 -6313
Blythe 11:19:13 -36.9 Dark Up 72.3 215.5 Up 11:04:13 - 11:34:13 -6340
Idyllwild 11:19:24 -38.7 Dark Up 73.1 209.4 Up 11:04:24 - 11:34:24 -6341
Calipatria 11:19:19 -37.7 Dark Up 73.1 213.9 Up 11:04:19 - 11:34:19 -6399
Yuma 11:19:13 -36.9 Dark Up 73.0 217.1 Up 11:04:13 - 11:34:13 -6439

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, (2023/11/24 11:20UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 12.25  89
Alhena         06:37:42.8 +16:23:57  1.9  8.16  75
51 Gem         07:13:22.3 +16:09:31  5.0  2.66  83
PPM 123630     07:09:55.6 +18:50:38  7.6  0.18  82
99XY143        07:10:31.2 +18:43:32 15.4        82
Positions are for J2000

Event circumstances last updated at 2020/02/06 19:29:00 UT

Marc W. Buie, Southwest Research Institute

RECON