RECON: TNO occultation with 69986

Event between (69986) 98WW24 and star GA1020:01839274 with event index number of 1244230

Geocentric closest approach at 2022/12/23 10:14:29 UTC

J2000 position of star is 06:27:22.0 +13:28:19
Equinox of date position of star is 06:28:37.3 +13:27:24
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 165 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=23.8

[RECON map]
TNO is 35.7 AU from the Sun and 34.7 AU from the Earth.
The TNO is moving 25.2 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 307 seconds.
The 1-sigma cross-track error in the shadow position is 2161 km.
The sky-plane scale is 25162.3 km/arcsec.

The TNO has an absolute magnitude Hv=8.3
Diameter=131.8 km assuming a 5% albedo -- 5.2 sec chord
Diameter=53.8 km assuming a 30% albedo -- 2.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69986, (2022/12/23 10:14UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:25.0 +07:24:34  0.4  9.97 160
Alhena         06:39:02.3 +16:22:40  1.9  3.85 167
PPM 122497     06:28:34.6 +14:52:25  6.2  1.42 167
PPM 122480     06:27:57.0 +13:05:07  7.0  0.41 165
PPM 122470     06:27:23.8 +13:36:29  9.6  0.34 166
69986          06:28:40.0 +13:27:22 15.0       165
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 2.9 sigma about the mid-time.
The median site spacing is 28.0 km RECON observability=1.0 and success probability=23.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 10:12:44 -44.0 Dark Down 38.7 237.1 Up 09:57:44 - 10:27:44 1818
Kamloops 10:13:14 -52.6 Dark Down 46.4 221.5 Up 09:58:14 - 10:28:14 1570
Kelowna 10:13:10 -52.5 Dark Down 46.6 223.2 Up 09:58:10 - 10:28:10 1506
Peachland 10:13:11 -52.8 Dark Down 46.8 222.9 Up 09:58:11 - 10:28:11 1494
Summerland 10:13:10 -52.8 Dark Down 46.9 223.2 Up 09:58:10 - 10:28:10 1482
Penticton 10:13:10 -52.8 Dark Down 46.9 223.3 Up 09:58:10 - 10:28:10 1477
Oliver 10:13:09 -53.0 Dark Down 47.2 223.6 Up 09:58:09 - 10:28:09 1446
Anarchist Mountain Observatory 10:13:09 -52.9 Dark Down 47.2 224.0 Up 09:58:09 - 10:28:09 1432
Tonasket 10:13:08 -53.1 Dark Down 47.4 224.1 Up 09:58:08 - 10:28:08 1404
Okanogan 10:13:08 -53.4 Dark Down 47.8 224.2 Up 09:58:08 - 10:28:08 1373
Victoria 10:13:18 -55.4 Dark Down 49.3 219.1 Up 09:58:18 - 10:28:18 1359
Brewster 10:13:09 -53.7 Dark Down 48.0 224.1 Up 09:58:09 - 10:28:09 1347
Manson/Chelan 10:13:09 -54.0 Dark Down 48.4 223.8 Up 09:58:09 - 10:28:09 1326
Wenatchee 10:13:09 -54.3 Dark Down 48.8 224.0 Up 09:58:09 - 10:28:09 1282
Ellensburg 10:13:09 -54.7 Dark Down 49.2 224.0 Up 09:58:09 - 10:28:09 1243
Yakima 10:13:08 -54.9 Dark Down 49.5 224.3 Up 09:58:08 - 10:28:08 1205
Toppenish/White Swan 10:13:07 -54.9 Dark Down 49.6 224.7 Up 09:58:07 - 10:28:07 1187
PNWRO 10:13:03 -54.1 Dark Down 49.1 226.9 Up 09:58:03 - 10:28:03 1166
Goldendale 10:13:08 -55.4 Dark Down 50.2 224.6 Up 09:58:08 - 10:28:08 1133
The Dalles 10:13:09 -55.7 Dark Down 50.5 224.3 Up 09:58:09 - 10:28:09 1109
Maupin 10:13:08 -55.9 Dark Down 50.8 224.8 Up 09:58:08 - 10:28:08 1071
Sisters 10:13:08 -56.6 Dark Down 51.6 224.9 Up 09:58:08 - 10:28:08 986
Bend 10:13:07 -56.5 Dark Down 51.7 225.5 Up 09:58:07 - 10:28:07 965
Oregon Observatory 10:13:07 -56.7 Dark Down 51.9 225.5 Up 09:58:07 - 10:28:07 948
North Lake 10:13:04 -56.7 Dark Down 52.0 226.8 Up 09:58:04 - 10:28:04 892
Chiloquin 10:13:06 -57.6 Dark Down 53.0 226.1 Up 09:58:06 - 10:28:06 820
Lakeview 10:13:01 -56.7 Dark Down 52.4 228.5 Up 09:58:01 - 10:28:01 796
Klamath Falls 10:13:06 -57.7 Dark Down 53.2 226.6 Up 09:58:06 - 10:28:06 788
Dunrhomin 10:12:17 -46.4 Dark Down 43.9 247.0 Up 09:57:17 - 10:27:17 776
CU-SBO 10:12:17 -46.5 Dark Down 44.1 247.1 Up 09:57:17 - 10:27:17 751
Cedarville 10:13:00 -56.9 Dark Down 52.8 229.4 Up 09:58:00 - 10:28:00 735
Fall River/Burney 10:13:03 -57.9 Dark Down 53.8 228.3 Up 09:58:03 - 10:28:03 677
Susanville 10:13:00 -57.6 Dark Down 53.8 229.9 Up 09:58:00 - 10:28:00 623
Gimple 10:13:00 -57.9 Dark Down 54.1 229.9 Up 09:58:00 - 10:28:00 594
Greenville 10:13:00 -57.9 Dark Down 54.1 229.8 Up 09:58:00 - 10:28:00 593
Quincy 10:13:00 -58.0 Dark Down 54.2 230.0 Up 09:58:00 - 10:28:00 573
Portola 10:12:59 -57.7 Dark Down 54.0 230.8 Up 09:57:59 - 10:27:59 565
Reno 10:12:56 -57.4 Dark Down 53.8 231.9 Up 09:57:56 - 10:27:56 545
Carson City 10:12:56 -57.5 Dark Down 54.0 232.3 Up 09:57:56 - 10:27:56 510
Yerington 10:12:54 -57.1 Dark Down 53.8 233.3 Up 09:57:54 - 10:27:54 497
Gardnerville 10:12:55 -57.5 Dark Down 54.2 232.6 Up 09:57:55 - 10:27:55 486
Hawthorne 10:12:52 -56.8 Dark Down 53.7 234.5 Up 09:57:52 - 10:27:52 456
Tonopah 10:12:47 -55.9 Dark Down 53.1 236.7 Up 09:57:47 - 10:27:47 424
Lee Vining 10:12:52 -57.3 Dark Down 54.4 234.5 Up 09:57:52 - 10:27:52 396
Bishop 10:12:49 -56.9 Dark Down 54.2 236.1 Up 09:57:49 - 10:27:49 343
Beatty 10:12:44 -55.8 Dark Down 53.4 238.5 Up 09:57:44 - 10:27:44 313
Indian Springs 10:12:40 -55.0 Dark Down 52.8 240.1 Up 09:57:40 - 10:27:40 292
Henderson 10:12:37 -54.6 Dark Down 52.6 241.5 Up 09:57:37 - 10:27:37 245
Patrick 10:12:33 -53.8 Dark Down 52.1 243.4 Up 09:57:33 - 10:27:33 195
Kingman/Dolan Springs 10:12:33 -54.0 Dark Down 52.3 243.4 Up 09:57:33 - 10:27:33 170
Laughlin/Bullhead City 10:12:35 -54.4 Dark Down 52.7 242.9 Up 09:57:35 - 10:27:35 162
Mohave Valley 10:12:35 -54.5 Dark Down 52.9 243.2 Up 09:57:35 - 10:27:35 135
Lake Havasu City 10:12:33 -54.3 Dark Down 52.8 244.0 Up 09:57:33 - 10:27:33 97
Parker 10:12:33 -54.3 Dark Down 53.0 244.4 Up 09:57:33 - 10:27:33 62
George/Scottsdale 10:12:25 -52.4 Dark Down 51.3 247.3 Up 09:57:25 - 10:27:25 47
Wildwood 10:12:46 -57.8 Dark Down 56.1 239.8 Up 09:57:46 - 10:27:46 10
Idyllwild 10:12:40 -56.4 Dark Down 54.9 242.4 Up 09:57:40 - 10:27:40 -6
Calipatria 10:12:35 -55.5 Dark Down 54.3 244.4 Up 09:57:35 - 10:27:35 -56
Yuma 10:12:32 -54.8 Dark Down 53.9 245.8 Up 09:57:32 - 10:27:32 -90

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 69986, (2022/12/23 10:14UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  9.97 160
Alhena         06:37:42.8 +16:23:57  1.9  3.85 167
PPM 122497     06:27:15.8 +14:53:21  6.2  1.42 167
PPM 122480     06:26:39.2 +13:06:02  7.0  0.41 165
PPM 122470     06:26:05.7 +13:37:23  9.6  0.34 166
69986          06:27:22.0 +13:28:19 15.0       165
Positions are for J2000

Event circumstances last updated at 2022/03/17 00:57:18 UT

Marc W. Buie, Southwest Research Institute

RECON