RECON: TNO occultation with 98WY31

Event between 98WY31 and star GA1120:02710122 with event index number of 1415121

Geocentric closest approach at 2024/11/02 12:22:30 UTC

J2000 position of star is 07:14:39.0 +23:40:54
Equinox of date position of star is 07:15:58.8 +23:38:32
Stellar brightness G=14.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 124 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=23.3

[RECON map]
TNO is 42.5 AU from the Sun and 42.1 AU from the Earth.
The TNO is moving 7.6 km/sec on the sky relative to the star, or, 0.9 arcsec/hr.
The 1-sigma error in the time of the event is 604 seconds.
The 1-sigma cross-track error in the shadow position is 2545 km.
The sky-plane scale is 30525.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.9
Diameter=259.4 km assuming a 5% albedo -- 33.5 sec chord
Diameter=105.9 km assuming a 30% albedo -- 13.7 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 98WY31, (2024/11/02 12:23UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:50.1 +27:57:51  1.1  8.15 118
48 Gem         07:13:56.8 +24:05:06  6.2  0.67 125
PPM 097238     07:16:07.8 +23:45:42  9.5  0.12 124
98WY31         07:16:09.2 +23:38:13 14.8       124
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 1.5 sigma about the mid-time.
The median site spacing is 28.5 km RECON observability=1.0 and success probability=22.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 12:22:09 -15.6 AT Down 59.8 204.7 Up 12:07:09 - 12:37:09 335
Kamloops 12:24:07 -24.3 Dark Down 63.0 178.5 Up 12:09:07 - 12:39:07 -56
Kelowna 12:23:57 -23.8 Dark Down 63.8 180.3 Up 12:08:57 - 12:38:57 -121
Peachland 12:23:59 -24.0 Dark Down 63.9 179.7 Up 12:08:59 - 12:38:59 -137
Summerland 12:23:58 -24.0 Dark Down 64.1 179.9 Up 12:08:58 - 12:38:58 -150
Penticton 12:23:57 -23.9 Dark Down 64.1 180.1 Up 12:08:57 - 12:38:57 -155
Oliver 12:23:56 -24.0 Dark Down 64.5 180.1 Up 12:08:56 - 12:38:56 -189
Anarchist Mountain Observatory 12:23:54 -23.9 Dark Down 64.7 180.5 Up 12:08:54 - 12:38:54 -203
Tonasket 12:23:53 -23.9 Dark Down 65.0 180.3 Up 12:08:53 - 12:38:53 -234
Okanogan 12:23:54 -24.1 Dark Down 65.3 180.0 Up 12:08:54 - 12:38:54 -270
Brewster 12:23:55 -24.2 Dark Down 65.6 179.6 Up 12:08:55 - 12:38:55 -300
Victoria 12:24:29 -26.5 Dark Down 65.0 172.0 Up 12:09:29 - 12:39:29 -313
Manson/Chelan 12:23:58 -24.5 Dark Down 65.8 178.8 Up 12:08:58 - 12:38:58 -327
Wenatchee 12:23:58 -24.6 Dark Down 66.3 178.3 Up 12:08:58 - 12:38:58 -377
Ellensburg 12:23:59 -24.8 Dark Down 66.7 177.8 Up 12:08:59 - 12:38:59 -421
Yakima 12:23:58 -24.8 Dark Down 67.1 177.7 Up 12:08:58 - 12:38:58 -462
Toppenish/White Swan 12:23:56 -24.7 Dark Down 67.3 178.1 Up 12:08:56 - 12:38:56 -481
PNWRO 12:23:41 -23.8 Dark Down 67.7 181.5 Up 12:08:41 - 12:38:41 -493
Goldendale 12:23:59 -25.1 Dark Down 67.8 177.0 Up 12:08:59 - 12:38:59 -544
The Dalles 12:24:02 -25.3 Dark Down 68.0 176.1 Up 12:09:02 - 12:39:02 -573
Maupin 12:24:00 -25.3 Dark Down 68.5 176.3 Up 12:09:00 - 12:39:00 -613
Sisters 12:24:02 -25.7 Dark Down 69.3 174.9 Up 12:09:02 - 12:39:02 -711
Bend 12:23:59 -25.5 Dark Down 69.6 175.5 Up 12:08:59 - 12:38:59 -731
Oregon Observatory 12:24:00 -25.6 Dark Down 69.7 175.1 Up 12:09:00 - 12:39:00 -750
Dunrhomin 12:21:03 -14.0 AT Down 69.8 219.0 Up 12:06:03 - 12:36:03 -776
North Lake 12:23:52 -25.3 Dark Down 70.4 176.4 Up 12:08:52 - 12:38:52 -807
Chiloquin 12:24:01 -26.0 Dark Down 71.0 173.6 Up 12:09:01 - 12:39:01 -893
Lakeview 12:23:45 -25.0 Dark Down 71.5 177.7 Up 12:08:45 - 12:38:45 -906
Klamath Falls 12:23:59 -26.0 Dark Down 71.4 173.7 Up 12:08:59 - 12:38:59 -927
Cedarville 12:23:41 -24.9 Dark Down 72.1 178.1 Up 12:08:41 - 12:38:41 -971
Fall River/Burney 12:23:52 -25.8 Dark Down 72.6 174.4 Up 12:08:52 - 12:38:52 -1043
Susanville 12:23:43 -25.3 Dark Down 73.2 176.4 Up 12:08:43 - 12:38:43 -1095
Gimple 12:23:45 -25.4 Dark Down 73.5 175.7 Up 12:08:45 - 12:38:45 -1128
Greenville 12:23:45 -25.5 Dark Down 73.5 175.5 Up 12:08:45 - 12:38:45 -1129
Quincy 12:23:45 -25.5 Dark Down 73.7 175.4 Up 12:08:45 - 12:38:45 -1150
Portola 12:23:39 -25.1 Dark Down 73.9 176.9 Up 12:08:39 - 12:38:39 -1155
Reno 12:23:32 -24.7 Dark Down 74.1 178.9 Up 12:08:32 - 12:38:32 -1171
Carson City 12:23:31 -24.7 Dark Down 74.5 178.9 Up 12:08:31 - 12:38:31 -1208
Yerington 12:23:21 -24.2 Dark Down 74.7 181.0 Up 12:08:21 - 12:38:21 -1217
Gardnerville 12:23:29 -24.6 Dark Down 74.7 179.1 Up 12:08:29 - 12:38:29 -1233
Hawthorne 12:23:14 -23.8 Dark Down 75.1 182.8 Up 12:08:14 - 12:38:14 -1255
Tonopah 12:23:00 -22.7 Dark Down 75.5 187.9 Up 12:08:00 - 12:38:00 -1276
Lee Vining 12:23:18 -24.2 Dark Down 75.7 181.2 Up 12:08:18 - 12:38:18 -1324
Bishop 12:23:10 -23.6 Dark Down 76.3 183.9 Up 12:08:10 - 12:38:10 -1372
Beatty 12:22:51 -22.4 Dark Down 76.6 190.2 Up 12:07:51 - 12:37:51 -1388
Indian Springs 12:22:38 -21.5 Dark Down 76.7 194.5 Up 12:07:38 - 12:37:38 -1399
Henderson 12:22:28 -21.0 Dark Down 77.1 197.7 Up 12:07:28 - 12:37:28 -1441
Patrick 12:22:14 -20.1 Dark Down 77.4 202.8 Up 12:07:14 - 12:37:14 -1481
Kingman/Dolan Springs 12:22:15 -20.2 Dark Down 77.7 202.5 Up 12:07:15 - 12:37:15 -1509
Laughlin/Bullhead City 12:22:21 -20.6 Dark Down 77.8 200.5 Up 12:07:21 - 12:37:21 -1523
Mohave Valley 12:22:20 -20.6 Dark Down 78.1 201.0 Up 12:07:20 - 12:37:20 -1551
Lake Havasu City 12:22:15 -20.3 Dark Down 78.4 202.6 Up 12:07:15 - 12:37:15 -1588
George/Scottsdale 12:21:45 -18.3 Dark Down 78.2 214.0 Up 12:06:45 - 12:36:45 -1612
Parker 12:22:14 -20.3 Dark Down 78.7 203.4 Up 12:07:14 - 12:37:14 -1624
Idyllwild 12:22:40 -22.2 Dark Down 79.7 193.2 Up 12:07:40 - 12:37:40 -1721
Wildwood 12:23:03 -23.7 Dark Down 79.6 183.9 Up 12:08:03 - 12:38:03 -1722
Calipatria 12:22:25 -21.2 Dark Down 80.0 199.9 Up 12:07:25 - 12:37:25 -1760
Yuma 12:22:13 -20.5 Dark Down 80.1 205.0 Up 12:07:13 - 12:37:13 -1785

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 98WY31, (2024/11/02 12:23UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1  8.15 118
48 Gem         07:12:26.3 +24:07:42  6.2  0.67 125
PPM 097238     07:14:37.6 +23:48:23  9.5  0.12 124
98WY31         07:14:39.0 +23:40:54 14.8       124
Positions are for J2000

Event circumstances last updated at 2021/12/25 23:56:04 UT

Marc W. Buie, Southwest Research Institute

RECON