RECON: TNO occultation with 29981

Event between (29981) 99TD10 and star GA1040:02995441 with event index number of 1806952

Geocentric closest approach at 2028/01/02 12:20:15 UTC

J2000 position of star is 07:50:08.5 +15:15:06
Equinox of date position of star is 07:51:24.5 +15:11:37
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 133 degrees from the moon. Moon is 27% illuminated.
TNO apparent brightness V=24.7

[RECON map]
TNO is 39.8 AU from the Sun and 38.9 AU from the Earth.
The TNO is moving 25.7 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 330 seconds.
The 1-sigma cross-track error in the shadow position is 3383 km.
The sky-plane scale is 28178.2 km/arcsec.

The TNO has an absolute magnitude Hv=8.7
Diameter=109.7 km assuming a 5% albedo -- 4.3 sec chord
Diameter=44.8 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 29981, (2028/01/02 12:20UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:47:01.8 +27:57:22  1.1 12.82 129
5 Cnc          08:03:05.8 +16:22:34  5.9  2.99 136
PPM 124502     07:52:06.3 +14:46:07  7.6  0.42 133
PPM 124489     07:51:21.4 +15:02:04  8.7  0.17 133
29981          07:51:43.6 +15:10:45 14.6       134
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 2.7 sigma about the mid-time.
The median site spacing is 23.9 km RECON observability=1.0 and success probability=10.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 12:18:29 -25.3 Dark Down 28.6 257.8 Low 12:03:29 - 12:33:29 -3025
Kamloops 12:18:46 -34.3 Dark Down 37.5 245.6 Up 12:03:46 - 12:33:46 -3425
Kelowna 12:18:42 -33.8 Dark Down 37.3 247.0 Up 12:03:42 - 12:33:42 -3465
Peachland 12:18:42 -34.0 Dark Down 37.5 246.8 Up 12:03:42 - 12:33:42 -3479
Summerland 12:18:41 -33.9 Dark Down 37.5 247.0 Up 12:03:41 - 12:33:41 -3488
Penticton 12:18:41 -33.8 Dark Down 37.5 247.1 Up 12:03:41 - 12:33:41 -3490
Oliver 12:18:40 -33.9 Dark Down 37.6 247.4 Up 12:03:40 - 12:33:40 -3516
Anarchist Mountain Observatory 12:18:39 -33.8 Dark Down 37.6 247.7 Up 12:03:39 - 12:33:39 -3524
Tonasket 12:18:38 -33.8 Dark Down 37.8 247.8 Up 12:03:38 - 12:33:38 -3549
Okanogan 12:18:37 -33.9 Dark Down 38.0 247.9 Up 12:03:37 - 12:33:37 -3577
Brewster 12:18:37 -34.1 Dark Down 38.2 247.9 Up 12:03:37 - 12:33:37 -3602
Manson/Chelan 12:18:37 -34.3 Dark Down 38.5 247.7 Up 12:03:37 - 12:33:37 -3626
Victoria 12:18:45 -36.4 Dark Down 40.2 244.1 Up 12:03:45 - 12:33:45 -3650
Wenatchee 12:18:36 -34.5 Dark Down 38.8 247.9 Up 12:03:36 - 12:33:36 -3666
Ellensburg 12:18:36 -34.7 Dark Down 39.1 248.0 Up 12:03:36 - 12:33:36 -3702
Yakima 12:18:34 -34.7 Dark Down 39.3 248.3 Up 12:03:34 - 12:33:34 -3734
PNWRO 12:18:30 -33.6 Dark Down 38.4 250.3 Up 12:03:30 - 12:33:30 -3741
Toppenish/White Swan 12:18:33 -34.6 Dark Down 39.2 248.6 Up 12:03:33 - 12:33:33 -3747
Goldendale 12:18:33 -34.9 Dark Down 39.7 248.6 Up 12:03:33 - 12:33:33 -3800
The Dalles 12:18:33 -35.2 Dark Down 40.0 248.5 Up 12:03:33 - 12:33:33 -3826
Dunrhomin 12:17:51 -23.2 Dark Down 29.9 264.8 Low 12:02:51 - 12:32:51 -3852
Maupin 12:18:31 -35.1 Dark Down 40.1 248.9 Up 12:03:31 - 12:33:31 -3857
CU-SBO 12:17:49 -23.2 Dark Down 30.1 264.9 Up 12:02:49 - 12:32:49 -3874
Sisters 12:18:30 -35.5 Dark Down 40.8 249.1 Up 12:03:30 - 12:33:30 -3938
Bend 12:18:29 -35.3 Dark Down 40.7 249.6 Up 12:03:29 - 12:33:29 -3951
Oregon Observatory 12:18:28 -35.4 Dark Down 40.8 249.6 Up 12:03:28 - 12:33:28 -3968
North Lake 12:18:25 -35.0 Dark Down 40.7 250.6 Up 12:03:25 - 12:33:25 -4007
Lakeview 12:18:22 -34.6 Dark Down 40.7 251.9 Up 12:03:22 - 12:33:22 -4080
Chiloquin 12:18:25 -35.7 Dark Down 41.6 250.3 Up 12:03:25 - 12:33:25 -4086
Klamath Falls 12:18:25 -35.7 Dark Down 41.6 250.6 Up 12:03:25 - 12:33:25 -4112
Cedarville 12:18:20 -34.5 Dark Down 40.7 252.6 Up 12:03:20 - 12:33:20 -4130
Fall River/Burney 12:18:21 -35.4 Dark Down 41.8 252.0 Up 12:03:21 - 12:33:21 -4202
Susanville 12:18:18 -34.8 Dark Down 41.4 253.1 Up 12:03:18 - 12:33:18 -4236
Gimple 12:18:18 -35.0 Dark Down 41.6 253.2 Up 12:03:18 - 12:33:18 -4265
Greenville 12:18:18 -35.1 Dark Down 41.7 253.1 Up 12:03:18 - 12:33:18 -4267
Portola 12:18:17 -34.7 Dark Down 41.5 253.8 Up 12:03:17 - 12:33:17 -4283
Quincy 12:18:17 -35.1 Dark Down 41.8 253.3 Up 12:03:17 - 12:33:17 -4284
Reno 12:18:14 -34.2 Dark Down 41.1 254.5 Up 12:03:14 - 12:33:14 -4289
Carson City 12:18:13 -34.1 Dark Down 41.1 254.8 Up 12:03:13 - 12:33:13 -4319
Yerington 12:18:11 -33.6 Dark Down 40.7 255.5 Up 12:03:11 - 12:33:11 -4319
Gardnerville 12:18:12 -34.1 Dark Down 41.2 255.1 Up 12:03:12 - 12:33:12 -4339
Hawthorne 12:18:09 -33.2 Dark Down 40.4 256.3 Up 12:03:09 - 12:33:09 -4345
Tonopah 12:18:05 -32.1 Dark Down 39.5 257.8 Up 12:03:05 - 12:33:05 -4348
Lee Vining 12:18:08 -33.6 Dark Down 40.9 256.4 Up 12:03:08 - 12:33:08 -4407
Indian Springs 12:17:58 -30.7 Dark Down 38.6 260.0 Up 12:02:58 - 12:32:58 -4436
Beatty 12:18:00 -31.6 Dark Down 39.4 259.0 Up 12:03:00 - 12:33:00 -4437
Bishop 12:18:06 -32.9 Dark Down 40.5 257.4 Up 12:03:06 - 12:33:06 -4440
Henderson 12:17:55 -30.1 Dark Down 38.1 260.9 Up 12:02:55 - 12:32:55 -4464
Patrick 12:17:51 -29.1 Dark Down 37.3 262.2 Up 12:02:51 - 12:32:51 -4488
Kingman/Dolan Springs 12:17:51 -29.3 Dark Down 37.5 262.2 Up 12:02:51 - 12:32:51 -4513
Laughlin/Bullhead City 12:17:52 -29.7 Dark Down 37.9 261.9 Up 12:02:52 - 12:32:52 -4529
Mohave Valley 12:17:51 -29.6 Dark Down 38.0 262.1 Up 12:02:51 - 12:32:51 -4553
George/Scottsdale 12:17:43 -27.2 Dark Down 35.9 264.7 Up 12:02:43 - 12:32:43 -4582
Lake Havasu City 12:17:50 -29.4 Dark Down 37.8 262.6 Up 12:02:50 - 12:32:50 -4582
Parker 12:17:49 -29.3 Dark Down 37.8 262.9 Up 12:02:49 - 12:32:49 -4612
Idyllwild 12:17:52 -31.2 Dark Down 39.9 261.6 Up 12:02:52 - 12:32:52 -4716
Wildwood 12:17:58 -32.8 Dark Down 41.4 260.1 Up 12:02:58 - 12:32:58 -4736
Calipatria 12:17:49 -30.1 Dark Down 39.0 262.9 Up 12:02:49 - 12:32:49 -4738
Yuma 12:17:46 -29.3 Dark Down 38.3 263.8 Up 12:02:46 - 12:32:46 -4752

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 29981, (2028/01/02 12:20UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 12.82 129
5 Cnc          08:01:30.2 +16:27:19  5.9  2.99 136
PPM 124502     07:50:31.5 +14:50:29  7.6  0.42 133
PPM 124489     07:49:46.4 +15:06:24  8.7  0.17 133
29981          07:50:08.5 +15:15:06 14.6       133
Positions are for J2000

Event circumstances last updated at 2022/05/20 23:00:24 UT

Marc W. Buie, Southwest Research Institute

RECON