RECON: TNO occultation with 02WL21

Event between 02WL21 and star GA1140:02631065 with event index number of 1997944

Geocentric closest approach at 2024/01/24 09:47:41 UTC

J2000 position of star is 06:58:01.4 +24:18:18
Equinox of date position of star is 06:59:24.5 +24:16:22
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 7 degrees from the moon. Moon is 98% illuminated.
TNO apparent brightness V=23.9

[RECON map]
TNO is 42.2 AU from the Sun and 41.3 AU from the Earth.
The TNO is moving 23.8 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 258 seconds.
The 1-sigma cross-track error in the shadow position is 2048 km.
The sky-plane scale is 29950.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.6
Diameter=181.1 km assuming a 5% albedo -- 7.6 sec chord
Diameter=74.0 km assuming a 30% albedo -- 3.1 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 02WL21, (2024/01/24 09:48UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:47.2 +27:57:58  1.1 11.24   5
Alhena         06:39:06.1 +16:22:36  1.9  9.23  15
42Ome Gem      07:03:52.7 +24:10:44  5.2  1.00   6
PPM 096789     06:58:28.0 +24:36:33  7.8  0.41   7
PPM 096782     06:58:15.6 +24:15:51  9.8  0.28   7
02WL21         06:59:29.4 +24:16:15 16.0         6
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 3.5 sigma about the mid-time.
The median site spacing is 20.3 km RECON observability=1.0 and success probability=18.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 09:45:36 -46.1 Dark Up 37.7 261.6 Up 09:30:36 - 10:00:36 -1477
Kamloops 09:45:56 -53.7 Dark Up 46.7 249.6 Up 09:30:56 - 10:00:56 -1968
Kelowna 09:45:52 -53.9 Dark Up 46.5 251.3 Up 09:30:52 - 10:00:52 -2013
Peachland 09:45:52 -54.1 Dark Up 46.7 251.1 Up 09:30:52 - 10:00:52 -2030
Summerland 09:45:51 -54.2 Dark Up 46.7 251.3 Up 09:30:51 - 10:00:51 -2040
Penticton 09:45:51 -54.2 Dark Up 46.6 251.5 Up 09:30:51 - 10:00:51 -2043
Oliver 09:45:50 -54.5 Dark Up 46.7 251.9 Up 09:30:50 - 10:00:50 -2073
Anarchist Mountain Observatory 09:45:49 -54.5 Dark Up 46.7 252.2 Up 09:30:49 - 10:00:49 -2082
Tonasket 09:45:48 -54.8 Dark Up 46.8 252.5 Up 09:30:48 - 10:00:48 -2110
Okanogan 09:45:47 -55.1 Dark Up 47.0 252.7 Up 09:30:47 - 10:00:47 -2143
Brewster 09:45:47 -55.4 Dark Up 47.2 252.7 Up 09:30:47 - 10:00:47 -2171
Manson/Chelan 09:45:47 -55.7 Dark Up 47.5 252.6 Up 09:30:47 - 10:00:47 -2199
Victoria 09:45:57 -56.6 Dark Up 49.3 248.7 Up 09:30:57 - 10:00:57 -2228
Wenatchee 09:45:47 -56.2 Dark Up 47.8 252.9 Up 09:30:47 - 10:00:47 -2245
Ellensburg 09:45:46 -56.6 Dark Up 48.0 253.2 Up 09:30:46 - 10:00:46 -2287
Yakima 09:45:45 -56.9 Dark Up 48.2 253.6 Up 09:30:45 - 10:00:45 -2323
PNWRO 09:45:39 -56.5 Dark Up 47.2 255.7 Up 09:30:39 - 10:00:39 -2328
Toppenish/White Swan 09:45:44 -57.0 Dark Up 48.1 254.0 Up 09:30:44 - 10:00:44 -2337
Goldendale 09:45:43 -57.6 Dark Up 48.6 254.2 Up 09:30:43 - 10:00:43 -2398
Dunrhomin 09:44:57 -51.3 Dark Up 38.0 271.3 Up 09:29:57 - 09:59:57 -2402
CU-SBO 09:44:56 -51.5 Dark Up 38.1 271.4 Up 09:29:56 - 09:59:56 -2427
The Dalles 09:45:44 -57.9 Dark Up 48.9 254.1 Up 09:30:44 - 10:00:44 -2428
Maupin 09:45:42 -58.2 Dark Up 48.9 254.6 Up 09:30:42 - 10:00:42 -2462
Sisters 09:45:41 -59.0 Dark Up 49.5 255.1 Up 09:30:41 - 10:00:41 -2555
Bend 09:45:40 -59.1 Dark Up 49.4 255.6 Up 09:30:40 - 10:00:40 -2569
Oregon Observatory 09:45:40 -59.3 Dark Up 49.5 255.7 Up 09:30:40 - 10:00:40 -2588
North Lake 09:45:37 -59.5 Dark Up 49.3 256.9 Up 09:30:37 - 10:00:37 -2631
Lakeview 09:45:33 -59.9 Dark Up 49.1 258.6 Up 09:30:33 - 10:00:33 -2712
Chiloquin 09:45:37 -60.4 Dark Up 50.1 256.9 Up 09:30:37 - 10:00:37 -2720
Klamath Falls 09:45:36 -60.6 Dark Up 50.1 257.3 Up 09:30:36 - 10:00:36 -2750
Cedarville 09:45:31 -60.3 Dark Up 49.1 259.5 Up 09:30:31 - 10:00:31 -2767
Fall River/Burney 09:45:32 -61.3 Dark Up 50.1 259.0 Up 09:30:32 - 10:00:32 -2848
Susanville 09:45:29 -61.3 Dark Up 49.7 260.3 Up 09:30:29 - 10:00:29 -2885
Gimple 09:45:29 -61.6 Dark Up 49.9 260.5 Up 09:30:29 - 10:00:29 -2917
Greenville 09:45:29 -61.6 Dark Up 49.9 260.4 Up 09:30:29 - 10:00:29 -2919
Portola 09:45:27 -61.6 Dark Up 49.6 261.2 Up 09:30:27 - 10:00:27 -2936
Quincy 09:45:28 -61.8 Dark Up 50.0 260.7 Up 09:30:28 - 10:00:28 -2938
Reno 09:45:25 -61.3 Dark Up 49.2 262.0 Up 09:30:25 - 10:00:25 -2941
Yerington 09:45:22 -61.3 Dark Up 48.8 263.1 Up 09:30:22 - 10:00:22 -2973
Carson City 09:45:24 -61.5 Dark Up 49.2 262.4 Up 09:30:24 - 10:00:24 -2974
Gardnerville 09:45:23 -61.7 Dark Up 49.2 262.7 Up 09:30:23 - 10:00:23 -2995
Tonopah 09:45:15 -60.6 Dark Up 47.4 265.5 Up 09:30:15 - 10:00:15 -2999
Hawthorne 09:45:20 -61.2 Dark Up 48.4 264.0 Up 09:30:20 - 10:00:20 -3000
Lee Vining 09:45:19 -61.9 Dark Up 48.8 264.3 Up 09:30:19 - 10:00:19 -3068
Indian Springs 09:45:08 -60.3 Dark Up 46.2 268.1 Up 09:30:08 - 10:00:08 -3088
Beatty 09:45:11 -60.9 Dark Up 47.1 267.0 Up 09:30:11 - 10:00:11 -3093
Bishop 09:45:17 -61.7 Dark Up 48.3 265.5 Up 09:30:17 - 10:00:17 -3102
Henderson 09:45:05 -60.0 Dark Up 45.7 269.0 Up 09:30:05 - 10:00:05 -3116
Patrick 09:45:01 -59.5 Dark Up 44.8 270.3 Up 09:30:01 - 10:00:01 -3137
Kingman/Dolan Springs 09:45:00 -59.7 Dark Up 45.0 270.4 Up 09:30:00 - 10:00:00 -3164
Laughlin/Bullhead City 09:45:02 -60.1 Dark Up 45.4 270.2 Up 09:30:02 - 10:00:02 -3184
Mohave Valley 09:45:01 -60.2 Dark Up 45.4 270.4 Up 09:30:01 - 10:00:01 -3210
George/Scottsdale 09:44:52 -58.6 Dark Up 43.1 273.0 Up 09:29:52 - 09:59:52 -3227
Lake Havasu City 09:45:00 -60.2 Dark Up 45.2 271.0 Up 09:30:00 - 10:00:00 -3240
Parker 09:44:59 -60.3 Dark Up 45.2 271.3 Up 09:29:59 - 09:59:59 -3272
Idyllwild 09:45:04 -62.3 Dark Up 47.1 270.5 Up 09:30:04 - 10:00:04 -3393
Calipatria 09:45:00 -61.6 Dark Up 46.2 271.7 Up 09:30:00 - 10:00:00 -3412
Wildwood 09:45:09 -63.5 Dark Up 48.7 269.0 Up 09:30:09 - 10:00:09 -3422
Yuma 09:44:56 -61.1 Dark Up 45.4 272.6 Up 09:29:56 - 09:59:56 -3423

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, (2024/01/24 09:48UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 11.24   5
Alhena         06:37:42.8 +16:23:57  1.9  9.23  15
42Ome Gem      07:02:24.8 +24:12:55  5.2  1.00   6
PPM 096789     06:56:59.7 +24:38:34  7.8  0.41   7
PPM 096782     06:56:47.6 +24:17:51  9.8  0.28   7
02WL21         06:58:01.4 +24:18:18 16.0         7
Positions are for J2000

Event circumstances last updated at 2022/09/27 03:28:59 UT

Marc W. Buie, Southwest Research Institute

RECON