RECON: TNO occultation with 450265

Event between (450265) 03WU172 and star GA1120:03069036 with event index number of 2289176

Geocentric closest approach at 2028/02/01 08:22:05 UTC

J2000 position of star is 08:42:30.0 +22:10:24
Equinox of date position of star is 08:43:48.0 +22:05:31
Stellar brightness G=13.4, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 113 degrees from the moon. Moon is 27% illuminated.
TNO apparent brightness V=21.0

[RECON map]
TNO is 29.4 AU from the Sun and 28.4 AU from the Earth.
The TNO is moving 24.0 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 179 seconds.
The 1-sigma cross-track error in the shadow position is 2279 km.
The sky-plane scale is 20626.0 km/arcsec.

The TNO has an absolute magnitude Hv=6.4
Diameter=322.1 km assuming a 5% albedo -- 13.4 sec chord
Diameter=131.5 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 450265, (2028/02/01 08:23UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:47:02.1 +27:57:22  1.1 14.20  99
43Gam Cnc      08:44:54.5 +21:21:56  4.7  0.73 113
PPM 099029     08:48:06.7 +22:14:53  8.5  0.94 113
PPM 098993     08:45:23.7 +22:36:38  9.9  0.61 113
PPM 098980     08:44:18.4 +22:00:25 11.2  0.08 113
450265         08:44:07.9 +22:04:16 13.4       113
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 5.0 sigma about the mid-time.
The median site spacing is 27.9 km RECON observability=1.0 and success probability=16.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:21:46 -52.9 Dark Down 56.4 214.8 Up 08:06:46 - 08:36:46 -1950
Kamloops 08:22:22 -56.5 Dark Down 61.2 191.0 Up 08:07:22 - 08:37:22 -2393
Kelowna 08:22:18 -57.3 Dark Down 61.8 193.0 Up 08:07:18 - 08:37:18 -2451
Peachland 08:22:19 -57.4 Dark Down 62.0 192.4 Up 08:07:19 - 08:37:19 -2467
Summerland 08:22:18 -57.5 Dark Down 62.1 192.7 Up 08:07:18 - 08:37:18 -2479
Penticton 08:22:18 -57.6 Dark Down 62.2 192.9 Up 08:07:18 - 08:37:18 -2483
Oliver 08:22:18 -57.9 Dark Down 62.5 193.1 Up 08:07:18 - 08:37:18 -2516
Anarchist Mountain Observatory 08:22:17 -58.1 Dark Down 62.6 193.5 Up 08:07:17 - 08:37:17 -2528
Tonasket 08:22:17 -58.4 Dark Down 63.0 193.5 Up 08:07:17 - 08:37:17 -2559
Okanogan 08:22:16 -58.8 Dark Down 63.3 193.4 Up 08:07:16 - 08:37:16 -2594
Brewster 08:22:17 -59.0 Dark Down 63.6 193.1 Up 08:07:17 - 08:37:17 -2623
Manson/Chelan 08:22:18 -59.3 Dark Down 63.9 192.4 Up 08:07:18 - 08:37:18 -2651
Victoria 08:22:28 -58.7 Dark Down 63.6 185.5 Up 08:07:28 - 08:37:28 -2655
Wenatchee 08:22:17 -59.7 Dark Down 64.3 192.3 Up 08:07:17 - 08:37:17 -2700
Ellensburg 08:22:17 -60.2 Dark Down 64.8 192.0 Up 08:07:17 - 08:37:17 -2744
Yakima 08:22:17 -60.6 Dark Down 65.2 192.1 Up 08:07:17 - 08:37:17 -2783
Toppenish/White Swan 08:22:17 -60.8 Dark Down 65.4 192.6 Up 08:07:17 - 08:37:17 -2800
PNWRO 08:22:11 -61.1 Dark Down 65.5 196.0 Up 08:07:11 - 08:37:11 -2803
Goldendale 08:22:17 -61.4 Dark Down 66.0 191.9 Up 08:07:17 - 08:37:17 -2863
The Dalles 08:22:18 -61.6 Dark Down 66.2 191.2 Up 08:07:18 - 08:37:18 -2893
Maupin 08:22:17 -62.0 Dark Down 66.6 191.6 Up 08:07:17 - 08:37:17 -2931
Dunrhomin 08:21:19 -62.7 Dark Down 64.9 230.2 Up 08:06:19 - 08:36:19 -2993
CU-SBO 08:21:19 -63.0 Dark Down 65.1 230.4 Up 08:06:19 - 08:36:19 -3019
Sisters 08:22:17 -62.9 Dark Down 67.6 190.9 Up 08:07:17 - 08:37:17 -3028
Bend 08:22:16 -63.1 Dark Down 67.8 191.6 Up 08:07:16 - 08:37:16 -3045
Oregon Observatory 08:22:17 -63.3 Dark Down 68.0 191.4 Up 08:07:17 - 08:37:17 -3065
North Lake 08:22:14 -63.9 Dark Down 68.5 193.0 Up 08:07:14 - 08:37:14 -3116
Chiloquin 08:22:16 -64.6 Dark Down 69.3 191.0 Up 08:07:16 - 08:37:16 -3205
Lakeview 08:22:11 -65.0 Dark Down 69.4 195.0 Up 08:07:11 - 08:37:11 -3209
Klamath Falls 08:22:15 -65.0 Dark Down 69.6 191.3 Up 08:07:15 - 08:37:15 -3237
Cedarville 08:22:09 -65.6 Dark Down 70.0 196.0 Up 08:07:09 - 08:37:09 -3270
Fall River/Burney 08:22:13 -66.1 Dark Down 70.7 193.0 Up 08:07:13 - 08:37:13 -3347
Susanville 08:22:09 -66.7 Dark Down 71.2 195.5 Up 08:07:09 - 08:37:09 -3393
Gimple 08:22:10 -67.0 Dark Down 71.5 195.1 Up 08:07:10 - 08:37:10 -3426
Greenville 08:22:10 -67.0 Dark Down 71.5 194.9 Up 08:07:10 - 08:37:10 -3428
Quincy 08:22:10 -67.2 Dark Down 71.7 195.1 Up 08:07:10 - 08:37:10 -3448
Portola 08:22:08 -67.3 Dark Down 71.7 196.5 Up 08:07:08 - 08:37:08 -3450
Reno 08:22:05 -67.6 Dark Down 71.9 198.6 Up 08:07:05 - 08:37:05 -3461
Carson City 08:22:04 -67.9 Dark Down 72.2 199.0 Up 08:07:04 - 08:37:04 -3497
Yerington 08:22:02 -68.0 Dark Down 72.2 201.0 Up 08:07:02 - 08:37:02 -3501
Gardnerville 08:22:05 -68.2 Dark Down 72.4 199.4 Up 08:07:05 - 08:37:05 -3520
Hawthorne 08:22:00 -68.5 Dark Down 72.5 203.1 Up 08:07:00 - 08:37:00 -3535
Tonopah 08:21:55 -68.7 Dark Down 72.4 207.7 Up 08:06:55 - 08:36:55 -3546
Lee Vining 08:22:02 -69.1 Dark Down 73.2 202.4 Up 08:07:02 - 08:37:02 -3604
Bishop 08:21:57 -69.6 Dark Down 73.5 205.3 Up 08:06:57 - 08:36:57 -3647
Beatty 08:21:52 -69.7 Dark Down 73.3 210.8 Up 08:06:52 - 08:36:52 -3651
Indian Springs 08:21:47 -69.8 Dark Down 73.1 214.4 Up 08:06:47 - 08:36:47 -3655
Henderson 08:21:44 -70.1 Dark Down 73.2 217.3 Up 08:06:44 - 08:36:44 -3691
Patrick 08:21:39 -70.4 Dark Down 73.1 221.6 Up 08:06:39 - 08:36:39 -3723
Kingman/Dolan Springs 08:21:39 -70.6 Dark Down 73.4 221.6 Up 08:06:39 - 08:36:39 -3751
Laughlin/Bullhead City 08:21:41 -70.8 Dark Down 73.7 220.2 Up 08:06:41 - 08:36:41 -3768
Mohave Valley 08:21:41 -71.1 Dark Down 73.9 220.9 Up 08:06:41 - 08:36:41 -3795
Lake Havasu City 08:21:39 -71.4 Dark Down 74.1 222.4 Up 08:06:39 - 08:36:39 -3829
George/Scottsdale 08:21:29 -71.1 Dark Down 73.1 230.4 Up 08:06:29 - 08:36:29 -3836
Parker 08:21:38 -71.7 Dark Down 74.3 223.4 Up 08:06:38 - 08:36:38 -3864
Idyllwild 08:21:46 -72.8 Dark Down 75.9 217.3 Up 08:06:46 - 08:36:46 -3973
Wildwood 08:21:54 -72.8 Dark Down 76.5 210.3 Up 08:06:54 - 08:36:54 -3987
Calipatria 08:21:42 -73.0 Dark Down 75.7 222.5 Up 08:06:42 - 08:36:42 -4003
Yuma 08:21:38 -73.1 Dark Down 75.5 226.2 Up 08:06:38 - 08:36:38 -4022

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 450265, (2028/02/01 08:23UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 14.20  99
43Gam Cnc      08:43:17.0 +21:28:06  4.7  0.73 113
PPM 099029     08:46:28.8 +22:21:08  8.5  0.94 113
PPM 098993     08:43:45.5 +22:42:48  9.9  0.61 113
PPM 098980     08:42:40.5 +22:06:33 11.2  0.08 113
450265         08:42:30.0 +22:10:24 13.4       113
Positions are for J2000

Event circumstances last updated at 2022/05/21 23:08:37 UT

Marc W. Buie, Southwest Research Institute

RECON