RECON: TNO occultation with 69986

Event between (69986) 98WW24 and star GA1020:02011506 with event index number of 1333000

Geocentric closest approach at 2023/12/09 09:59:54 UTC

J2000 position of star is 06:35:48.0 +13:04:52
Equinox of date position of star is 06:37:03.1 +13:03:42
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 114 degrees from the moon. Moon is 14% illuminated.
TNO apparent brightness V=23.9

[RECON map]
TNO is 35.9 AU from the Sun and 35.0 AU from the Earth.
The TNO is moving 23.3 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 428 seconds.
The 1-sigma cross-track error in the shadow position is 2645 km.
The sky-plane scale is 25368.8 km/arcsec.

The TNO has an absolute magnitude Hv=8.3
Diameter=131.8 km assuming a 5% albedo -- 5.7 sec chord
Diameter=53.8 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69986, (2023/12/09 10:00UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:28.1 +07:24:34  0.4 11.49 123
Alhena         06:39:05.7 +16:22:37  1.9  3.35 114
PPM 122607     06:32:59.6 +11:46:24  6.3  1.64 115
PPM 122737     06:37:13.7 +13:09:22  8.1  0.10 114
69986          06:37:08.9 +13:03:36 16.0       114
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 28.2 km RECON observability=1.0 and success probability=19.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:58:40 -44.5 Dark Down 47.0 213.4 Up 09:43:40 - 10:13:40 1487
Kamloops 09:59:20 -53.0 Dark Down 51.8 193.3 Up 09:44:20 - 10:14:20 1358
Kelowna 09:59:17 -53.0 Dark Down 52.4 195.0 Up 09:44:17 - 10:14:17 1285
Peachland 09:59:18 -53.2 Dark Down 52.6 194.5 Up 09:44:18 - 10:14:18 1275
Summerland 09:59:18 -53.2 Dark Down 52.7 194.7 Up 09:44:18 - 10:14:18 1262
Penticton 09:59:17 -53.2 Dark Down 52.8 194.9 Up 09:44:17 - 10:14:17 1256
Oliver 09:59:17 -53.4 Dark Down 53.1 195.0 Up 09:44:17 - 10:14:17 1224
Anarchist Mountain Observatory 09:59:17 -53.4 Dark Down 53.2 195.4 Up 09:44:17 - 10:14:17 1208
Tonasket 09:59:17 -53.6 Dark Down 53.6 195.4 Up 09:44:17 - 10:14:17 1180
Victoria 09:59:29 -55.8 Dark Down 54.3 189.0 Up 09:44:29 - 10:14:29 1172
Okanogan 09:59:17 -53.9 Dark Down 53.9 195.3 Up 09:44:17 - 10:14:17 1150
Brewster 09:59:17 -54.2 Dark Down 54.2 195.1 Up 09:44:17 - 10:14:17 1125
Manson/Chelan 09:59:19 -54.5 Dark Down 54.5 194.5 Up 09:44:19 - 10:14:19 1107
Wenatchee 09:59:19 -54.8 Dark Down 55.0 194.4 Up 09:44:19 - 10:14:19 1064
Ellensburg 09:59:19 -55.2 Dark Down 55.4 194.2 Up 09:44:19 - 10:14:19 1026
Yakima 09:59:19 -55.4 Dark Down 55.8 194.3 Up 09:44:19 - 10:14:19 988
Toppenish/White Swan 09:59:19 -55.4 Dark Down 56.0 194.7 Up 09:44:19 - 10:14:19 968
PNWRO 09:59:14 -54.7 Dark Down 56.0 197.4 Up 09:44:14 - 10:14:14 931
Goldendale 09:59:20 -56.0 Dark Down 56.6 194.2 Up 09:44:20 - 10:14:20 917
The Dalles 09:59:21 -56.3 Dark Down 56.9 193.6 Up 09:44:21 - 10:14:21 896
Maupin 09:59:21 -56.5 Dark Down 57.2 194.0 Up 09:44:21 - 10:14:21 857
Sisters 09:59:22 -57.2 Dark Down 58.2 193.4 Up 09:44:22 - 10:14:22 775
Bend 09:59:21 -57.2 Dark Down 58.4 194.0 Up 09:44:21 - 10:14:21 751
Oregon Observatory 09:59:22 -57.4 Dark Down 58.6 193.8 Up 09:44:22 - 10:14:22 735
North Lake 09:59:20 -57.3 Dark Down 59.1 195.1 Up 09:44:20 - 10:14:20 673
Chiloquin 09:59:23 -58.3 Dark Down 59.9 193.5 Up 09:44:23 - 10:14:23 609
Klamath Falls 09:59:23 -58.4 Dark Down 60.2 193.8 Up 09:44:23 - 10:14:23 576
Lakeview 09:59:18 -57.5 Dark Down 60.0 196.6 Up 09:44:18 - 10:14:18 569
Cedarville 09:59:17 -57.6 Dark Down 60.6 197.2 Up 09:44:17 - 10:14:17 505
Fall River/Burney 09:59:21 -58.7 Dark Down 61.3 195.1 Up 09:44:21 - 10:14:21 460
Susanville 09:59:19 -58.4 Dark Down 61.8 196.9 Up 09:44:19 - 10:14:19 396
Dunrhomin 09:58:25 -47.4 Dark Down 56.0 223.7 Up 09:43:25 - 10:13:25 387
Greenville 09:59:20 -58.8 Dark Down 62.1 196.4 Up 09:44:20 - 10:14:20 369
Gimple 09:59:19 -58.7 Dark Down 62.1 196.6 Up 09:44:19 - 10:14:19 369
CU-SBO 09:58:25 -47.5 Dark Down 56.2 223.8 Up 09:43:25 - 10:13:25 362
Quincy 09:59:19 -58.8 Dark Down 62.3 196.6 Up 09:44:19 - 10:14:19 349
Portola 09:59:18 -58.6 Dark Down 62.3 197.6 Up 09:44:18 - 10:14:18 336
Reno 09:59:15 -58.2 Dark Down 62.4 199.1 Up 09:44:15 - 10:14:15 308
Carson City 09:59:15 -58.3 Dark Down 62.7 199.3 Up 09:44:15 - 10:14:15 272
Yerington 09:59:13 -57.9 Dark Down 62.7 200.7 Up 09:44:13 - 10:14:13 251
Gardnerville 09:59:15 -58.4 Dark Down 62.9 199.6 Up 09:44:15 - 10:14:15 247
Hawthorne 09:59:11 -57.7 Dark Down 63.0 202.1 Up 09:44:11 - 10:14:11 204
Tonopah 09:59:06 -56.8 Dark Down 63.0 205.3 Up 09:44:06 - 10:14:06 155
Lee Vining 09:59:13 -58.3 Dark Down 63.7 201.6 Up 09:44:13 - 10:14:13 148
Bishop 09:59:10 -57.9 Dark Down 64.0 203.5 Up 09:44:10 - 10:14:10 86
Beatty 09:59:04 -56.8 Dark Down 63.9 207.3 Up 09:44:04 - 10:14:04 37
Indian Springs 09:58:59 -56.1 Dark Down 63.8 209.8 Up 09:43:59 - 10:13:59 3
Henderson 09:58:57 -55.6 Dark Down 63.9 211.7 Up 09:43:57 - 10:13:57 -52
Patrick 09:58:52 -54.9 Dark Down 64.0 214.6 Up 09:43:52 - 10:13:52 -116
Kingman/Dolan Springs 09:58:53 -55.1 Dark Down 64.3 214.4 Up 09:43:53 - 10:13:53 -139
Laughlin/Bullhead City 09:58:55 -55.5 Dark Down 64.5 213.5 Up 09:43:55 - 10:13:55 -142
Mohave Valley 09:58:55 -55.5 Dark Down 64.7 213.8 Up 09:43:55 - 10:13:55 -170
Lake Havasu City 09:58:54 -55.4 Dark Down 64.9 214.8 Up 09:43:54 - 10:13:54 -211
Parker 09:58:53 -55.5 Dark Down 65.2 215.2 Up 09:43:53 - 10:13:53 -248
Wildwood 09:59:10 -58.9 Dark Down 67.1 206.1 Up 09:44:10 - 10:14:10 -249
Idyllwild 09:59:02 -57.5 Dark Down 66.6 210.7 Up 09:44:02 - 10:14:02 -289
George/Scottsdale 09:58:44 -53.5 Dark Down 64.3 220.5 Up 09:43:44 - 10:13:44 -291
Calipatria 09:58:58 -56.6 Dark Down 66.6 214.0 Up 09:43:58 - 10:13:58 -354
Yuma 09:58:54 -55.9 Dark Down 66.6 216.5 Up 09:43:54 - 10:13:54 -399

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, (2023/12/09 10:00UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 11.49 123
Alhena         06:37:42.8 +16:23:57  1.9  3.35 114
PPM 122607     06:31:39.4 +11:47:32  6.3  1.64 115
PPM 122737     06:35:52.7 +13:10:39  8.1  0.10 114
69986          06:35:48.0 +13:04:52 16.0       114
Positions are for J2000

Event circumstances last updated at 2022/03/23 00:42:01 UT

Marc W. Buie, Southwest Research Institute

RECON