RECON: TNO occultation with 98WX24

Event between 98WX24 and star GA1120:01310141 with event index number of 1398783

Geocentric closest approach at 2024/11/27 08:39:43 UTC

J2000 position of star is 05:35:56.2 +23:41:47
Equinox of date position of star is 05:37:20.2 +23:42:34
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 118 degrees from the moon. Moon is 14% illuminated.
Apparent brightness V=23.2

[RECON map]
Object is 44.9 AU from the Sun and 44.0 AU from the Earth.
Apparent velocity is 24.2 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 388 seconds.
The 1-sigma cross-track error in the shadow position is 1727 km.
The sky-plane scale is 31895.9 km/arcsec.

The object has an absolute magnitude Hv=6.7
Diameter=281.8 km assuming a 5% albedo -- 11.5 sec chord
Diameter=115.1 km assuming a 30% albedo -- 4.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 98WX24, (2024/11/27 08:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:21.2 +16:33:27  0.8 15.80 132
Alnath         05:27:52.1 +28:37:34  1.6  5.37 120
PPM 094690     05:43:25.7 +23:20:12  6.5  1.42 116
PPM 094515     05:36:35.1 +24:18:19  8.0  0.63 118
PPM 094523     05:36:50.9 +23:31:38  9.4  0.23 118
98WX24         05:37:27.3 +23:42:38 15.4       117
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 36.4 km RECON observability=1.0 and success probability=28.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:39:22 -52.8 Dark Down 61.2 192.8 Up 08:24:22 - 08:54:22 -290
Kamloops 08:40:03 -58.9 Dark Down 62.4 164.9 Up 08:25:03 - 08:55:03 -389
Kelowna 08:40:01 -59.4 Dark Down 63.3 166.3 Up 08:25:01 - 08:55:01 -475
Peachland 08:40:02 -59.6 Dark Down 63.4 165.6 Up 08:25:02 - 08:55:02 -484
Summerland 08:40:02 -59.7 Dark Down 63.5 165.7 Up 08:25:02 - 08:55:02 -500
Penticton 08:40:01 -59.7 Dark Down 63.6 165.9 Up 08:25:01 - 08:55:01 -507
Oliver 08:40:02 -60.1 Dark Down 64.0 165.7 Up 08:25:02 - 08:55:02 -542
Anarchist Mountain Observatory 08:40:01 -60.2 Dark Down 64.2 166.1 Up 08:25:01 - 08:55:01 -560
Victoria 08:40:13 -61.6 Dark Down 63.8 157.6 Up 08:25:13 - 08:55:13 -581
Okanogan 08:40:02 -60.8 Dark Down 64.7 165.3 Up 08:25:02 - 08:55:02 -624
Brewster 08:40:03 -61.1 Dark Down 65.0 164.7 Up 08:25:03 - 08:55:03 -650
Manson/Chelan 08:40:04 -61.4 Dark Down 65.1 163.8 Up 08:25:04 - 08:55:04 -668
Wenatchee 08:40:05 -61.9 Dark Down 65.5 163.1 Up 08:25:05 - 08:55:05 -715
Ellensburg 08:40:06 -62.3 Dark Down 65.9 162.4 Up 08:25:06 - 08:55:06 -755
Yakima 08:40:06 -62.7 Dark Down 66.3 162.1 Up 08:25:06 - 08:55:06 -796
Toppenish/White Swan 08:40:06 -62.8 Dark Down 66.5 162.3 Up 08:25:06 - 08:55:06 -820
PNWRO 08:40:01 -62.7 Dark Down 67.2 165.5 Up 08:25:01 - 08:55:01 -867
The Dalles 08:40:09 -63.8 Dark Down 67.1 160.0 Up 08:25:09 - 08:55:09 -894
Maupin 08:40:08 -64.1 Dark Down 67.5 159.9 Up 08:25:08 - 08:55:08 -937
Sisters 08:40:11 -65.0 Dark Down 68.2 158.0 Up 08:25:11 - 08:55:11 -1024
Bend 08:40:10 -65.2 Dark Down 68.5 158.3 Up 08:25:10 - 08:55:10 -1050
Oregon Observatory 08:40:10 -65.4 Dark Down 68.6 157.9 Up 08:25:10 - 08:55:10 -1067
Chiloquin 08:40:12 -66.7 Dark Down 69.7 155.5 Up 08:25:12 - 08:55:12 -1201
Klamath Falls 08:40:13 -67.0 Dark Down 70.0 155.3 Up 08:25:13 - 08:55:13 -1237
Cedarville 08:40:08 -67.0 Dark Down 71.1 158.7 Up 08:25:08 - 08:55:08 -1322
Fall River/Burney 08:40:12 -67.8 Dark Down 71.2 154.9 Up 08:25:12 - 08:55:12 -1364
Greenville 08:40:11 -68.4 Dark Down 72.2 155.0 Up 08:25:11 - 08:55:11 -1463
Gimple 08:40:11 -68.4 Dark Down 72.2 155.2 Up 08:25:11 - 08:55:11 -1464
Quincy 08:40:11 -68.6 Dark Down 72.4 154.7 Up 08:25:11 - 08:55:11 -1485
Portola 08:40:10 -68.5 Dark Down 72.6 155.9 Up 08:25:10 - 08:55:10 -1502
Dunrhomin 08:39:17 -59.7 Dark Down 72.3 202.9 Up 08:24:17 - 08:54:17 -1503
Nikitin 08:39:17 -59.8 Dark Down 72.5 203.1 Up 08:24:17 - 08:54:17 -1522
CU-SBO 08:39:17 -59.9 Dark Down 72.6 202.9 Up 08:24:17 - 08:54:17 -1529
Reno 08:40:07 -68.5 Dark Down 73.1 157.4 Up 08:25:07 - 08:55:07 -1535
Carson City 08:40:08 -68.7 Dark Down 73.4 157.0 Up 08:25:08 - 08:55:08 -1573
Yerington 08:40:06 -68.6 Dark Down 73.8 158.7 Up 08:25:06 - 08:55:06 -1598
Gardnerville 08:40:08 -68.9 Dark Down 73.7 156.8 Up 08:25:08 - 08:55:08 -1599
Hawthorne 08:40:03 -68.7 Dark Down 74.4 159.8 Up 08:25:03 - 08:55:03 -1652
Lee Vining 08:40:06 -69.4 Dark Down 74.7 157.5 Up 08:25:06 - 08:55:06 -1709
Bishop 08:40:04 -69.5 Dark Down 75.5 159.0 Up 08:25:04 - 08:55:04 -1778
Beatty 08:39:58 -68.9 Dark Down 76.4 164.3 Up 08:24:58 - 08:54:58 -1838
Patrick 08:39:48 -68.0 Dark Down 78.2 174.9 Up 08:24:48 - 08:54:48 -2013
Laughlin/Bullhead City 08:39:50 -68.7 Dark Down 78.4 171.6 Up 08:24:50 - 08:54:50 -2036
Lake Havasu City 08:39:50 -68.9 Dark Down 79.1 172.3 Up 08:24:50 - 08:54:50 -2111
Wildwood 08:40:06 -71.9 Dark Down 78.4 152.5 Up 08:25:06 - 08:55:06 -2130
Idyllwild 08:39:59 -70.9 Dark Down 79.4 160.0 Up 08:24:59 - 08:54:59 -2181
George/Scottsdale 08:39:41 -67.5 Dark Down 80.0 184.4 Up 08:24:41 - 08:54:41 -2204
Calipatria 08:39:54 -70.4 Dark Down 80.3 164.8 Up 08:24:54 - 08:54:54 -2254
Yuma 08:39:51 -70.0 Dark Down 80.9 169.0 Up 08:24:51 - 08:54:51 -2306

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, (2024/11/27 08:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 15.80 132
Alnath         05:26:17.6 +28:36:23  1.6  5.37 120
PPM 094690     05:41:54.8 +23:19:34  6.5  1.42 116
PPM 094515     05:35:03.6 +24:17:26  8.0  0.63 118
PPM 094523     05:35:19.9 +23:30:46  9.4  0.23 118
98WX24         05:35:56.2 +23:41:47 15.4       118
Positions are for J2000

Event circumstances last updated at 2022/12/24 04:08:57 UT

Marc W. Buie, Southwest Research Institute

RECON