RECON: TNO occultation with 98WY24

Event between 98WY24 and star GA1120:02714657 with event index number of 1119894

Geocentric closest approach at 2021/12/26 08:25:00 UTC

J2000 position of star is 07:15:17.4 +22:27:50
Equinox of date position of star is 07:16:36.4 +22:25:26
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 68 degrees from the moon. Moon is 58% illuminated.
TNO apparent brightness V=23.0

[RECON map]
TNO is 41.5 AU from the Sun and 40.5 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 142 seconds.
The 1-sigma cross-track error in the shadow position is 1637 km.
The sky-plane scale is 29391.3 km/arcsec.

The TNO has an absolute magnitude Hv=6.8
Diameter=267.9 km assuming a 5% albedo -- 10.7 sec chord
Diameter=109.4 km assuming a 30% albedo -- 4.4 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 98WY24, (2021/12/26 08:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:39.5 +27:58:17  1.1  8.77  62
55Del Gem      07:21:26.0 +21:56:24  3.5  1.22  67
PPM 097266     07:16:52.5 +21:55:36  8.4  0.50  68
PPM 097268     07:16:58.8 +22:29:56  9.5  0.11  68
98WY24         07:16:36.4 +22:25:26 15.9        68
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 5.0 sigma about the mid-time.
The median site spacing is 28.3 km RECON observability=1.0 and success probability=32.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:25:01 -57.4 Dark Up 59.9 192.2 Up 08:12:39 - 08:37:23 193
Kamloops 08:25:40 -62.3 Dark Up 61.2 165.1 Up 08:13:18 - 08:38:02 -73
Kelowna 08:25:37 -63.0 Dark Up 62.1 166.4 Up 08:13:15 - 08:37:59 -148
Peachland 08:25:38 -63.1 Dark Up 62.1 165.8 Up 08:13:16 - 08:38:00 -161
Summerland 08:25:38 -63.2 Dark Up 62.3 165.9 Up 08:13:16 - 08:38:00 -175
Penticton 08:25:38 -63.3 Dark Up 62.4 166.1 Up 08:13:16 - 08:38:00 -181
Oliver 08:25:37 -63.6 Dark Up 62.7 166.0 Up 08:13:15 - 08:37:59 -216
Anarchist Mountain Observatory 08:25:37 -63.8 Dark Up 62.9 166.3 Up 08:13:15 - 08:37:59 -232
Tonasket 08:25:37 -64.1 Dark Up 63.2 166.0 Up 08:13:15 - 08:37:59 -263
Okanogan 08:25:38 -64.4 Dark Up 63.5 165.5 Up 08:13:16 - 08:38:00 -298
Victoria 08:25:49 -64.7 Dark Up 62.6 158.1 Up 08:13:27 - 08:38:11 -304
Brewster 08:25:38 -64.7 Dark Up 63.7 165.0 Up 08:13:16 - 08:38:00 -326
Manson/Chelan 08:25:39 -65.0 Dark Up 63.9 164.1 Up 08:13:17 - 08:38:01 -350
Wenatchee 08:25:39 -65.5 Dark Up 64.3 163.5 Up 08:13:17 - 08:38:01 -399
Ellensburg 08:25:40 -65.9 Dark Up 64.7 162.8 Up 08:13:18 - 08:38:02 -442
Yakima 08:25:40 -66.3 Dark Up 65.0 162.5 Up 08:13:18 - 08:38:02 -483
Toppenish/White Swan 08:25:40 -66.5 Dark Up 65.3 162.7 Up 08:13:18 - 08:38:02 -504
Pasco 08:25:36 -66.4 Dark Up 65.6 165.3 Up 08:13:14 - 08:37:58 -508
PNWRO 08:25:35 -66.6 Dark Up 65.9 165.7 Up 08:13:13 - 08:37:57 -532
Goldendale 08:25:41 -67.1 Dark Up 65.7 161.4 Up 08:13:19 - 08:38:03 -563
The Dalles 08:25:42 -67.4 Dark Up 65.8 160.4 Up 08:13:20 - 08:38:04 -589
Maupin 08:25:42 -67.8 Dark Up 66.3 160.4 Up 08:13:20 - 08:38:04 -631
Sisters 08:25:43 -68.7 Dark Up 67.0 158.5 Up 08:13:21 - 08:38:05 -725
Redmond 08:25:42 -68.7 Dark Up 67.1 159.4 Up 08:13:20 - 08:38:04 -725
Bend 08:25:42 -68.9 Dark Up 67.3 158.9 Up 08:13:20 - 08:38:04 -748
Oregon Observatory 08:25:43 -69.1 Dark Up 67.4 158.5 Up 08:13:21 - 08:38:05 -766
La Pine/Gilchrist 08:25:43 -69.3 Dark Up 67.6 158.2 Up 08:13:21 - 08:38:05 -788
North Lake 08:25:41 -69.6 Dark Up 68.1 159.2 Up 08:13:19 - 08:38:03 -829
Paisley 08:25:40 -70.1 Dark Up 68.7 159.5 Up 08:13:18 - 08:38:02 -885
Chiloquin 08:25:44 -70.4 Dark Up 68.5 156.3 Up 08:13:22 - 08:38:06 -906
Lakeview 08:25:39 -70.5 Dark Up 69.3 159.5 Up 08:13:17 - 08:38:01 -936
Klamath Falls 08:25:44 -70.8 Dark Up 68.8 156.1 Up 08:13:22 - 08:38:06 -942
Dunrhomin 08:24:48 -65.6 Dark Up 71.2 201.3 Up 08:12:26 - 08:37:10 -970
Cedarville 08:25:38 -71.1 Dark Up 69.9 159.4 Up 08:13:16 - 08:38:00 -1004
Fall River/Burney 08:25:42 -71.8 Dark Up 70.0 155.8 Up 08:13:20 - 08:38:04 -1063
Susanville 08:25:40 -72.3 Dark Up 70.8 157.0 Up 08:13:18 - 08:38:02 -1125
Gimple 08:25:40 -72.6 Dark Up 71.0 156.1 Up 08:13:18 - 08:38:02 -1156
Greenville 08:25:40 -72.6 Dark Up 71.0 155.9 Up 08:13:18 - 08:38:02 -1156
Quincy 08:25:41 -72.8 Dark Up 71.2 155.6 Up 08:13:19 - 08:38:03 -1178
Portola 08:25:39 -72.8 Dark Up 71.4 156.8 Up 08:13:17 - 08:38:01 -1188
Reno 08:25:37 -72.9 Dark Up 71.9 158.2 Up 08:13:15 - 08:37:59 -1211
Carson City 08:25:37 -73.2 Dark Up 72.2 157.9 Up 08:13:15 - 08:37:59 -1249
Yerington 08:25:34 -73.2 Dark Up 72.6 159.5 Up 08:13:12 - 08:37:56 -1265
Gardnerville 08:25:36 -73.5 Dark Up 72.4 157.7 Up 08:13:14 - 08:37:58 -1275
Hawthorne 08:25:33 -73.5 Dark Up 73.1 160.5 Up 08:13:11 - 08:37:55 -1310
Tonopah 08:25:27 -73.4 Dark Up 73.9 164.5 Up 08:13:05 - 08:37:49 -1348
Lee Vining 08:25:34 -74.2 Dark Up 73.5 158.4 Up 08:13:12 - 08:37:56 -1374
Bishop 08:25:31 -74.5 Dark Up 74.3 159.9 Up 08:13:09 - 08:37:53 -1433
Beatty 08:25:26 -74.2 Dark Up 75.1 164.9 Up 08:13:04 - 08:37:48 -1468
Indian Springs 08:25:21 -74.0 Dark Up 75.6 168.4 Up 08:12:59 - 08:37:43 -1492
Henderson 08:25:19 -74.0 Dark Up 76.3 170.6 Up 08:12:57 - 08:37:41 -1542
Patrick 08:25:14 -73.9 Dark Up 77.0 174.6 Up 08:12:52 - 08:37:36 -1597
Kingman/Dolan Springs 08:25:15 -74.2 Dark Up 77.2 173.7 Up 08:12:53 - 08:37:37 -1623
Laughlin/Bullhead City 08:25:17 -74.5 Dark Up 77.2 171.6 Up 08:12:55 - 08:37:39 -1632
Mohave Valley 08:25:17 -74.7 Dark Up 77.4 171.4 Up 08:12:55 - 08:37:39 -1661
CPSLO 08:25:39 -77.1 Dark Up 75.4 149.3 Up 08:13:17 - 08:38:01 -1672
Lake Havasu City 08:25:16 -74.8 Dark Up 77.9 172.2 Up 08:12:54 - 08:37:38 -1701
Parker 08:25:16 -75.0 Dark Up 78.2 172.1 Up 08:12:54 - 08:37:38 -1739
George/Scottsdale 08:25:06 -73.7 Dark Up 78.7 183.2 Up 08:12:44 - 08:37:28 -1756
Wildwood 08:25:31 -77.3 Dark Up 77.2 154.1 Up 08:13:09 - 08:37:53 -1787
Blythe 08:25:16 -75.6 Dark Up 78.7 170.4 Up 08:12:54 - 08:37:38 -1799
Idyllwild 08:25:24 -76.7 Dark Up 78.2 161.1 Up 08:13:02 - 08:37:46 -1808
Calipatria 08:25:19 -76.5 Dark Up 79.0 165.5 Up 08:12:57 - 08:37:41 -1862
Yuma 08:25:16 -76.2 Dark Up 79.6 169.3 Up 08:12:54 - 08:37:38 -1900

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 98WY24, (2021/12/26 08:35UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1  8.77  62
55Del Gem      07:20:07.3 +21:58:56  3.5  1.22  67
PPM 097266     07:15:33.7 +21:58:00  8.4  0.50  68
PPM 097268     07:15:39.7 +22:32:20  9.5  0.11  68
98WY24         07:15:17.4 +22:27:50 15.9        68
Positions are for J2000

Event circumstances last updated at 2021/12/18 01:45:11 UT

Marc W. Buie, Southwest Research Institute

RECON