RECON: TNO occultation with 98WX24

Event between 98WX24 and star GA1120:01114483 with event index number of 1119817

Geocentric closest approach at 2021/11/22 04:52:05 UTC

J2000 position of star is 05:20:41.6 +23:27:02
Equinox of date position of star is 05:21:52.5 +23:28:08
Stellar brightness G=10.6, use SENSEUP=4
Star is 10 degrees from the moon. Moon is 93% illuminated.
TNO apparent brightness V=23.2

[RECON map]
TNO is 45.0 AU from the Sun and 44.0 AU from the Earth.
The TNO is moving 23.9 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 429 seconds.
The 1-sigma cross-track error in the shadow position is 1822 km.
The sky-plane scale is 31935.2 km/arcsec.

The TNO has an absolute magnitude Hv=6.7
Diameter=279.3 km assuming a 5% albedo -- 11.7 sec chord
Diameter=114.0 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 98WX24, (2021/11/22 04:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:10.8 +16:33:06  0.8 12.59  22
Alnath         05:27:40.7 +28:37:26  1.6  5.31   9
109 Tau        05:20:35.6 +22:07:02  4.9  1.39  11
PPM 094241     05:18:51.9 +24:01:53  7.9  0.91  10
PPM 094281     05:21:50.2 +23:19:00 10.5  0.16  10
98WX24         05:22:01.5 +23:28:16 10.6        10
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 2.1 sigma about the mid-time.
The median site spacing is 17.0 km RECON observability=1.0 and success probability=24.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 04:54:33 -45.3 Dark Up 34.0 93.1 Up 04:39:33 - 05:09:33 1116
Summerland 04:54:34 -45.3 Dark Up 33.8 92.7 Up 04:39:34 - 05:09:34 1102
Penticton 04:54:34 -45.4 Dark Up 33.9 92.8 Up 04:39:34 - 05:09:34 1094
Okanagan Falls 04:54:35 -45.5 Dark Up 33.9 92.6 Up 04:39:35 - 05:09:35 1080
Oliver 04:54:35 -45.5 Dark Up 33.9 92.5 Up 04:39:35 - 05:09:35 1067
Anarchist Mountain Observatory 04:54:36 -45.7 Dark Up 34.0 92.6 Up 04:39:36 - 05:09:36 1048
Oroville 04:54:36 -45.7 Dark Up 34.0 92.5 Up 04:39:36 - 05:09:36 1044
Tonasket 04:54:37 -45.8 Dark Up 34.0 92.3 Up 04:39:37 - 05:09:37 1026
Okanogan 04:54:38 -45.9 Dark Up 33.9 92.0 Up 04:39:38 - 05:09:38 1005
Brewster 04:54:39 -45.9 Dark Up 33.8 91.6 Up 04:39:39 - 05:09:39 989
Manson/Chelan 04:54:40 -45.7 Dark Up 33.6 91.2 Up 04:39:40 - 05:09:40 984
Entiat 04:54:41 -45.8 Dark Up 33.5 91.0 Up 04:39:41 - 05:09:41 969
Wenatchee 04:54:42 -45.8 Dark Up 33.5 90.8 Up 04:39:42 - 05:09:42 952
Ellensburg 04:54:44 -45.8 Dark Up 33.3 90.4 Up 04:39:44 - 05:09:44 926
Yakima 04:54:45 -46.0 Dark Up 33.3 90.1 Up 04:39:45 - 05:09:45 894
Toppenish/White Swan 04:54:45 -46.2 Dark Up 33.4 90.1 Up 04:39:45 - 05:09:45 872
Goldendale 04:54:48 -46.1 Dark Up 33.1 89.4 Up 04:39:48 - 05:09:48 841
The Dalles 04:54:49 -46.0 Dark Up 32.9 89.0 Up 04:39:49 - 05:09:49 834
Pasco 04:54:44 -47.0 Dark Up 34.3 90.9 Up 04:39:44 - 05:09:44 825
George/Umatilla 04:54:46 -47.0 Dark Up 34.2 90.5 Up 04:39:46 - 05:09:46 804
PNWRO 04:54:45 -47.3 Dark Up 34.5 90.9 Up 04:39:45 - 05:09:45 798
Maupin 04:54:50 -46.2 Dark Up 32.9 88.8 Up 04:39:50 - 05:09:50 797
Madras/Culver 04:54:52 -46.3 Dark Up 32.9 88.4 Up 04:39:52 - 05:09:52 754
Sisters 04:54:54 -46.1 Dark Up 32.6 87.9 Up 04:39:54 - 05:09:54 741
Redmond 04:54:53 -46.4 Dark Up 32.9 88.2 Up 04:39:53 - 05:09:53 727
Bend 04:54:54 -46.4 Dark Up 32.8 87.9 Up 04:39:54 - 05:09:54 714
Oregon Observatory 04:54:55 -46.4 Dark Up 32.7 87.7 Up 04:39:55 - 05:09:55 704
La Pine/Gilchrist 04:54:56 -46.4 Dark Up 32.6 87.6 Up 04:39:56 - 05:09:56 689
North Lake 04:54:56 -46.9 Dark Up 33.0 87.7 Up 04:39:56 - 05:09:56 634
Chiloquin 04:54:59 -46.5 Dark Up 32.3 86.6 Up 04:39:59 - 05:09:59 609
Klamath Falls 04:55:00 -46.6 Dark Up 32.4 86.5 Up 04:40:00 - 05:10:00 578
Paisley 04:54:57 -47.4 Dark Up 33.3 87.6 Up 04:39:57 - 05:09:57 577
Tulelake 04:55:01 -46.9 Dark Up 32.6 86.5 Up 04:40:01 - 05:10:01 546
Lakeview 04:54:58 -47.7 Dark Up 33.4 87.4 Up 04:39:58 - 05:09:58 529
Cedarville 04:55:00 -48.0 Dark Up 33.5 87.1 Up 04:40:00 - 05:10:00 468
Fall River/Burney 04:55:03 -47.3 Dark Up 32.6 86.0 Up 04:40:03 - 05:10:03 467
Susanville 04:55:04 -48.0 Dark Up 33.1 86.0 Up 04:40:04 - 05:10:04 389
Greenville 04:55:06 -47.8 Dark Up 32.8 85.7 Up 04:40:06 - 05:10:06 375
Gimple 04:55:05 -47.9 Dark Up 32.9 85.7 Up 04:40:05 - 05:10:05 372
Quincy 04:55:06 -47.9 Dark Up 32.8 85.6 Up 04:40:06 - 05:10:06 357
Portola 04:55:06 -48.3 Dark Up 33.2 85.8 Up 04:40:06 - 05:10:06 331
Reno 04:55:06 -48.8 Dark Up 33.7 86.0 Up 04:40:06 - 05:10:06 286
Carson City 04:55:07 -48.9 Dark Up 33.7 85.8 Up 04:40:07 - 05:10:07 254
Gardnerville 04:55:07 -49.0 Dark Up 33.7 85.6 Up 04:40:07 - 05:10:07 232
Yerington 04:55:06 -49.5 Dark Up 34.1 86.0 Up 04:40:06 - 05:10:06 216
Hawthorne 04:55:07 -50.0 Dark Up 34.5 86.0 Up 04:40:07 - 05:10:07 158
Lee Vining 04:55:09 -49.8 Dark Up 34.1 85.3 Up 04:40:09 - 05:10:09 124
Tonopah 04:55:06 -51.2 Dark Up 35.6 86.5 Up 04:40:06 - 05:10:06 69
Bishop 04:55:10 -50.5 Dark Up 34.6 85.3 Up 04:40:10 - 05:10:10 47
Lone Pine 04:55:11 -50.9 Dark Up 34.8 85.0 Up 04:40:11 - 05:10:11 -33
Beatty 04:55:08 -51.8 Dark Up 35.9 85.9 Up 04:40:08 - 05:10:08 -50
CPSLO 04:55:19 -49.1 Dark Up 32.6 82.8 Up 04:40:19 - 05:10:19 -60
Indian Springs 04:55:07 -52.8 Dark Up 36.7 86.3 Up 04:40:07 - 05:10:07 -116
Niwot 04:54:37 -58.9 Dark Up 44.8 95.9 Up 04:39:37 - 05:09:37 -121
SwRI 04:54:38 -58.8 Dark Up 44.8 95.8 Up 04:39:38 - 05:09:38 -128
Henderson 04:55:07 -53.4 Dark Up 37.3 86.3 Up 04:40:07 - 05:10:07 -188
Wildwood 04:55:19 -51.0 Dark Up 34.2 83.0 Up 04:40:19 - 05:10:19 -243
Searchlight/Boulder City 04:55:09 -53.6 Dark Up 37.3 85.9 Up 04:40:09 - 05:10:09 -243
Laughlin/Bullhead City 04:55:09 -54.0 Dark Up 37.5 85.8 Up 04:40:09 - 05:10:09 -282
Patrick 04:55:07 -54.5 Dark Up 38.1 86.4 Up 04:40:07 - 05:10:07 -284
Kingman/Dolan Springs 04:55:08 -54.4 Dark Up 38.0 86.1 Up 04:40:08 - 05:10:08 -298
Mohave Valley 04:55:10 -54.1 Dark Up 37.5 85.6 Up 04:40:10 - 05:10:10 -308
DCO 04:55:06 -55.1 Dark Up 38.7 86.5 Up 04:40:06 - 05:10:06 -336
Idyllwild 04:55:16 -52.6 Dark Up 35.7 83.7 Up 04:40:16 - 05:10:16 -342
Lake Havasu City 04:55:10 -54.4 Dark Up 37.7 85.5 Up 04:40:10 - 05:10:10 -354
Parker 04:55:11 -54.5 Dark Up 37.7 85.2 Up 04:40:11 - 05:10:11 -388
Blythe 04:55:13 -54.4 Dark Up 37.4 84.7 Up 04:40:13 - 05:10:13 -427
Calipatria 04:55:16 -53.7 Dark Up 36.6 83.8 Up 04:40:16 - 05:10:16 -441
Yuma 04:55:15 -54.5 Dark Up 37.3 83.9 Up 04:40:15 - 05:10:15 -513

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 98WX24, (2021/11/22 04:52UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 12.59  22
Alnath         05:26:17.5 +28:36:23  1.6  5.31   9
109 Tau        05:19:16.6 +22:05:46  4.9  1.39  11
PPM 094241     05:17:31.7 +24:00:34  7.9  0.91  10
PPM 094281     05:20:30.5 +23:17:46 10.5  0.16  10
98WX24         05:20:41.6 +23:27:02 10.6        10
Positions are for J2000

Event circumstances last updated at 2019/06/08 02:40:05 UT

Marc W. Buie, Southwest Research Institute

RECON