RECON: TNO occultation with 02WL21

Event between 02WL21 and star GA1140:02604045 with event index number of 1997951

Geocentric closest approach at 2024/03/20 08:04:45 UTC

J2000 position of star is 06:55:10.3 +24:21:01
Equinox of date position of star is 06:56:33.6 +24:19:11
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 24 degrees from the moon. Moon is 79% illuminated.
TNO apparent brightness V=24.0

[RECON map]
TNO is 42.2 AU from the Sun and 42.0 AU from the Earth.
The TNO is moving 2.5 km/sec on the sky relative to the star, or, 0.3 arcsec/hr.
The 1-sigma error in the time of the event is 2644 seconds.
The 1-sigma cross-track error in the shadow position is 2396 km.
The sky-plane scale is 30457.9 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=181.1 km assuming a 5% albedo -- 73.6 sec chord
Diameter=74.0 km assuming a 30% albedo -- 30.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 02WL21, (2024/03/20 08:05UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:47.8 +27:57:57  1.1 11.82  13
Alhena         06:39:06.6 +16:22:36  1.9  8.94  30
37 Gem         06:56:47.9 +25:20:36  6.3  1.03  24
PPM 096722     06:56:11.4 +24:12:46  7.7  0.15  24
02WL21         06:56:39.0 +24:19:04 15.4        24
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 0.3 sigma about the mid-time.
The median site spacing is 29.5 km RECON observability=1.0 and success probability=15.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 07:33:11 -37.6 Dark Up 23.8 279.6 Low 07:18:11 - 07:48:11 4283
Kamloops 07:35:03 -38.7 Dark Up 32.4 269.8 Up 07:20:03 - 07:50:03 3819
Kelowna 07:34:33 -39.6 Dark Up 31.9 270.9 Up 07:19:33 - 07:49:33 3764
Peachland 07:34:26 -39.7 Dark Up 32.1 270.7 Up 07:19:26 - 07:49:26 3748
Summerland 07:34:26 -39.9 Dark Up 32.0 270.9 Up 07:19:26 - 07:49:26 3736
Penticton 07:34:21 -39.9 Dark Up 32.0 271.0 Up 07:19:21 - 07:49:21 3732
Oliver 07:34:14 -40.3 Dark Up 32.0 271.2 Up 07:19:14 - 07:49:14 3700
Anarchist Mountain Observatory 07:34:05 -40.5 Dark Up 31.9 271.4 Up 07:19:05 - 07:49:05 3689
Tonasket 07:33:54 -40.8 Dark Up 32.0 271.5 Up 07:18:54 - 07:48:54 3658
Okanogan 07:33:46 -41.1 Dark Up 32.1 271.6 Up 07:18:46 - 07:48:46 3624
Brewster 07:33:51 -41.3 Dark Up 32.2 271.6 Up 07:18:51 - 07:48:51 3594
Manson/Chelan 07:33:53 -41.5 Dark Up 32.4 271.5 Up 07:18:53 - 07:48:53 3566
Victoria 07:34:51 -40.4 Dark Up 34.4 268.8 Up 07:19:51 - 07:49:51 3554
Wenatchee 07:33:38 -41.9 Dark Up 32.6 271.6 Up 07:18:38 - 07:48:38 3518
Ellensburg 07:33:30 -42.3 Dark Up 32.7 271.7 Up 07:18:30 - 07:48:30 3474
Yakima 07:33:20 -42.7 Dark Up 32.8 271.9 Up 07:18:20 - 07:48:20 3435
PNWRO 07:32:45 -43.4 Dark Up 31.7 273.3 Up 07:17:45 - 07:47:45 3418
Toppenish/White Swan 07:33:17 -42.9 Dark Up 32.6 272.2 Up 07:18:17 - 07:48:17 3418
Goldendale 07:33:09 -43.4 Dark Up 32.9 272.2 Up 07:18:09 - 07:48:09 3355
The Dalles 07:33:07 -43.5 Dark Up 33.2 272.1 Up 07:18:07 - 07:48:07 3325
Maupin 07:33:00 -43.9 Dark Up 33.1 272.4 Up 07:18:00 - 07:48:00 3288
Dunrhomin 07:27:54 -49.4 Dark Up 21.8 284.1 Low 07:12:54 - 07:42:54 3253
CU-SBO 07:27:57 -49.7 Dark Up 21.8 284.1 Low 07:12:57 - 07:42:57 3226
Sisters 07:32:42 -44.7 Dark Up 33.5 272.6 Up 07:17:42 - 07:47:42 3191
Bend 07:32:37 -45.0 Dark Up 33.3 272.9 Up 07:17:37 - 07:47:37 3174
Oregon Observatory 07:32:31 -45.1 Dark Up 33.4 272.9 Up 07:17:31 - 07:47:31 3154
North Lake 07:32:18 -45.8 Dark Up 33.0 273.7 Up 07:17:18 - 07:47:18 3104
Chiloquin 07:32:15 -46.3 Dark Up 33.7 273.5 Up 07:17:15 - 07:47:15 3015
Lakeview 07:31:46 -46.9 Dark Up 32.6 274.6 Up 07:16:46 - 07:46:46 3014
Klamath Falls 07:32:08 -46.6 Dark Up 33.6 273.7 Up 07:17:08 - 07:47:08 2983
Cedarville 07:31:31 -47.6 Dark Up 32.5 275.1 Up 07:16:31 - 07:46:31 2954
Fall River/Burney 07:31:40 -47.8 Dark Up 33.3 274.7 Up 07:16:40 - 07:46:40 2875
Susanville 07:31:17 -48.6 Dark Up 32.8 275.5 Up 07:16:17 - 07:46:17 2831
Gimple 07:31:16 -48.8 Dark Up 32.9 275.5 Up 07:16:16 - 07:46:16 2798
Greenville 07:31:17 -48.8 Dark Up 33.0 275.5 Up 07:16:17 - 07:46:17 2796
Quincy 07:31:13 -49.0 Dark Up 33.0 275.6 Up 07:16:13 - 07:46:13 2776
Portola 07:31:00 -49.2 Dark Up 32.6 275.9 Up 07:16:00 - 07:46:00 2775
Reno 07:30:43 -49.5 Dark Up 32.2 276.4 Up 07:15:43 - 07:45:43 2765
Carson City 07:30:42 -49.9 Dark Up 32.1 276.7 Up 07:15:42 - 07:45:42 2730
Yerington 07:30:29 -50.2 Dark Up 31.7 277.1 Up 07:15:29 - 07:45:29 2727
Gardnerville 07:30:30 -50.1 Dark Up 32.1 276.8 Up 07:15:30 - 07:45:30 2706
Hawthorne 07:30:09 -50.7 Dark Up 31.2 277.7 Up 07:15:09 - 07:45:09 2694
Tonopah 07:29:39 -51.4 Dark Up 30.2 278.7 Up 07:14:39 - 07:44:39 2685
Lee Vining 07:30:02 -51.2 Dark Up 31.6 277.7 Up 07:15:02 - 07:45:02 2624
Bishop 07:29:45 -51.9 Dark Up 31.0 278.4 Up 07:14:45 - 07:44:45 2583
Beatty 07:29:11 -52.6 Dark Up 29.7 279.5 Low 07:14:11 - 07:44:11 2581
Indian Springs 07:28:55 -53.0 Dark Up 28.9 280.2 Low 07:13:55 - 07:43:55 2579
Henderson 07:28:30 -53.6 Dark Up 28.3 280.8 Low 07:13:30 - 07:43:30 2545
Patrick 07:28:04 -54.4 Dark Up 27.4 281.6 Low 07:13:04 - 07:43:04 2514
Kingman/Dolan Springs 07:28:03 -54.6 Dark Up 27.5 281.6 Low 07:13:03 - 07:43:03 2486
Laughlin/Bullhead City 07:28:09 -54.5 Dark Up 27.9 281.4 Low 07:13:09 - 07:43:09 2469
Mohave Valley 07:28:07 -54.8 Dark Up 27.8 281.6 Low 07:13:07 - 07:43:07 2441
Lake Havasu City 07:27:54 -55.2 Dark Up 27.6 281.9 Low 07:12:54 - 07:42:54 2408
George/Scottsdale 07:27:06 -56.2 Dark Up 25.6 283.3 Low 07:12:06 - 07:42:06 2404
Parker 07:27:52 -55.6 Dark Up 27.5 282.0 Low 07:12:52 - 07:42:52 2373
Idyllwild 07:28:21 -55.7 Dark Up 29.3 281.2 Low 07:13:21 - 07:43:21 2261
Wildwood 07:28:57 -55.0 Dark Up 30.8 280.2 Up 07:13:57 - 07:43:57 2244
Calipatria 07:27:54 -56.4 Dark Up 28.3 282.0 Low 07:12:54 - 07:42:54 2233
Yuma 07:27:38 -57.0 Dark Up 27.5 282.6 Low 07:12:38 - 07:42:38 2215

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 02WL21, (2024/03/20 08:05UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 11.82  13
Alhena         06:37:42.8 +16:23:57  1.9  8.94  30
37 Gem         06:55:18.6 +25:22:33  6.3  1.03  24
PPM 096722     06:54:42.8 +24:14:42  7.7  0.15  24
02WL21         06:55:10.3 +24:21:01 15.4        24
Positions are for J2000

Event circumstances last updated at 2022/09/27 03:36:37 UT

Marc W. Buie, Southwest Research Institute

RECON