RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1200:01885699 with event index number of 2298194

Geocentric closest approach at 2023/03/21 04:57:48 UTC

J2000 position of star is 05:45:30.3 +30:40:43
Equinox of date position of star is 05:46:56.2 +30:41:10
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 94 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=22.5

[RECON map]
TNO is 18.5 AU from the Sun and 18.5 AU from the Earth.
The TNO is moving 10.3 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 315 seconds.
The 1-sigma cross-track error in the shadow position is 3198 km.
The sky-plane scale is 13413.1 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 7.4 sec chord
Diameter=31.0 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2023/03/21 04:58UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:15.3 +16:33:15  0.8 21.27  76
Alnath         05:27:45.7 +28:37:30  1.6  4.66  90
PPM 070700     05:42:06.1 +31:22:07  5.9  1.25  93
PPM 070785     05:46:00.7 +30:29:47  8.4  0.29  94
PPM 070788     05:46:13.9 +30:37:55  9.2  0.17  94
248835         05:47:00.0 +30:41:11 14.6        94
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 2.9 sigma about the mid-time.
The median site spacing is 4.8 km RECON observability=1.0 and success probability=6.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Dunrhomin 04:58:57 -40.1 Dark Down 39.9 279.4 Up 04:43:57 - 05:13:57 3836
Sleaford 04:57:33 -30.8 Dark Down 41.5 268.5 Up 04:42:33 - 05:12:33 3835
CU-SBO 04:58:57 -40.2 Dark Down 39.9 279.6 Up 04:43:57 - 05:13:57 3830
George/Scottsdale 05:00:43 -40.5 Dark Down 43.6 282.2 Up 04:45:43 - 05:15:43 3277
Patrick 05:00:24 -38.1 Dark Down 45.6 279.7 Up 04:45:24 - 05:15:24 3190
Kingman/Dolan Springs 05:00:26 -38.1 Dark Down 45.7 279.9 Up 04:45:26 - 05:15:26 3171
Kelowna 04:57:45 -26.1 Dark Down 50.2 259.3 Up 04:42:45 - 05:12:45 3140
Laughlin/Bullhead City 05:00:27 -37.8 Dark Down 46.1 279.7 Up 04:45:27 - 05:15:27 3136
Lake Havasu City 05:00:35 -38.4 Dark Down 45.8 280.5 Up 04:45:35 - 05:15:35 3135
Anarchist Mountain Observatory 04:57:56 -26.6 Dark Down 50.2 260.4 Up 04:42:56 - 05:12:56 3134
Henderson 05:00:17 -37.0 Dark Down 46.6 278.6 Up 04:45:17 - 05:15:17 3132
Penticton 04:57:50 -26.2 Dark Down 50.3 259.6 Up 04:42:50 - 05:12:50 3130
Mohave Valley 05:00:31 -38.0 Dark Down 46.0 280.0 Up 04:45:31 - 05:15:31 3129
Parker 05:00:39 -38.6 Dark Down 45.7 280.8 Up 04:45:39 - 05:15:39 3127
Summerland 04:57:48 -26.1 Dark Down 50.3 259.4 Up 04:42:48 - 05:12:48 3125
Oliver 04:57:54 -26.4 Dark Down 50.3 260.0 Up 04:42:54 - 05:12:54 3125
Tonasket 04:57:59 -26.8 Dark Down 50.3 260.7 Up 04:42:59 - 05:12:59 3124
Peachland 04:57:47 -26.0 Dark Down 50.4 259.2 Up 04:42:47 - 05:12:47 3122
Okanogan 04:58:02 -26.9 Dark Down 50.4 261.0 Up 04:43:02 - 05:13:02 3110
PNWRO 04:58:29 -28.7 Dark Down 50.2 264.5 Up 04:43:29 - 05:13:29 3109
Kamloops 04:57:38 -25.1 Dark Down 50.6 257.5 Up 04:42:38 - 05:12:38 3104
Indian Springs 05:00:11 -36.2 Dark Down 47.3 277.7 Up 04:45:11 - 05:15:11 3101
Brewster 04:58:03 -26.9 Dark Down 50.6 261.2 Up 04:43:03 - 05:13:03 3095
Tonopah 04:58:57 -34.2 Dark Down 48.9 275.1 Up 04:43:57 - 05:13:57 3093
Manson/Chelan 04:58:07 -26.9 Dark Down 50.9 261.1 Up 04:43:07 - 05:13:07 3070
Yuma 05:00:52 -39.2 Dark Down 45.6 282.2 Up 04:45:52 - 05:15:52 3062
Wenatchee 04:58:12 -27.0 Dark Down 51.0 261.6 Up 04:43:12 - 05:13:12 3052
Beatty 05:00:06 -35.3 Dark Down 48.2 276.8 Up 04:45:06 - 05:15:06 3038
Ellensburg 04:58:14 -27.2 Dark Down 51.3 261.9 Up 04:43:14 - 05:13:14 3031
Toppenish/White Swan 04:58:21 -27.6 Dark Down 51.2 262.8 Up 04:43:21 - 05:13:21 3028
Yakima 04:58:19 -27.4 Dark Down 51.3 262.4 Up 04:43:19 - 05:13:19 3022
Calipatria 05:00:46 -38.3 Dark Down 46.4 281.4 Up 04:45:46 - 05:15:46 3014
Hawthorne 04:58:58 -33.0 Dark Down 50.0 273.8 Up 04:43:58 - 05:13:58 3001
Goldendale 04:58:27 -27.7 Dark Down 51.6 263.2 Up 04:43:27 - 05:13:27 2992
Yerington 04:58:57 -32.4 Dark Down 50.5 272.9 Up 04:43:57 - 05:13:57 2970
The Dalles 04:58:28 -27.6 Dark Down 51.8 263.2 Up 04:43:28 - 05:13:28 2965
Lee Vining 04:58:57 -33.0 Dark Down 50.4 274.2 Up 04:43:57 - 05:13:57 2964
Maupin 04:58:33 -27.9 Dark Down 51.8 263.8 Up 04:43:33 - 05:13:33 2963
Idyllwild 05:00:39 -37.1 Dark Down 47.6 280.3 Up 04:45:39 - 05:15:39 2952
Bishop 04:59:59 -34.0 Dark Down 49.5 275.4 Up 04:44:59 - 05:14:59 2943
Lakeview 04:58:57 -30.0 Dark Down 51.4 268.2 Up 04:43:57 - 05:13:57 2942
Cedarville 04:58:57 -30.4 Dark Down 51.3 269.1 Up 04:43:57 - 05:13:57 2940
Reno 04:58:58 -31.7 Dark Down 51.0 271.8 Up 04:43:58 - 05:13:58 2932
North Lake 04:58:54 -29.1 Dark Down 51.8 266.4 Up 04:43:54 - 05:13:54 2931
Gardnerville 04:58:57 -32.1 Dark Down 50.9 272.6 Up 04:43:57 - 05:13:57 2930
Carson City 04:58:57 -31.9 Dark Down 51.0 272.3 Up 04:43:57 - 05:13:57 2930
Bend 04:58:45 -28.4 Dark Down 52.0 265.1 Up 04:43:45 - 05:13:45 2924
Sisters 04:58:41 -28.1 Dark Down 52.2 264.6 Up 04:43:41 - 05:13:41 2913
Oregon Observatory 04:58:46 -28.4 Dark Down 52.1 265.2 Up 04:43:46 - 05:13:46 2912
Victoria 04:57:55 -24.7 Dark Down 52.9 257.3 Up 04:42:55 - 05:12:55 2895
Portola 04:58:57 -31.1 Dark Down 51.5 271.1 Up 04:43:57 - 05:13:57 2892
Susanville 04:58:57 -30.7 Dark Down 51.7 270.2 Up 04:43:57 - 05:13:57 2889
Gimple 04:58:57 -30.7 Dark Down 51.8 270.4 Up 04:43:57 - 05:13:57 2870
Greenville 04:58:57 -30.6 Dark Down 51.9 270.4 Up 04:43:57 - 05:13:57 2865
Quincy 04:58:57 -30.8 Dark Down 51.9 270.6 Up 04:43:57 - 05:13:57 2862
Chiloquin 04:58:57 -28.8 Dark Down 52.5 266.6 Up 04:43:57 - 05:13:57 2854
Klamath Falls 04:58:58 -29.1 Dark Down 52.5 267.1 Up 04:43:58 - 05:13:58 2851
Fall River/Burney 04:58:57 -29.9 Dark Down 52.2 268.9 Up 04:43:57 - 05:13:57 2851
Wildwood 05:00:33 -35.5 Dark Down 49.2 279.1 Up 04:45:33 - 05:15:33 2832

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 248835, (2023/03/21 04:58UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 21.27  76
Alnath         05:26:17.6 +28:36:23  1.6  4.66  90
PPM 070700     05:40:35.9 +31:21:29  5.9  1.25  93
PPM 070785     05:44:31.1 +30:29:18  8.4  0.29  94
PPM 070788     05:44:44.2 +30:37:25  9.2  0.17  94
248835         05:45:30.3 +30:40:43 14.6        94
Positions are for J2000

Event circumstances last updated at 2022/03/19 00:50:56 UT

Marc W. Buie, Southwest Research Institute

RECON