RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1240:02009915 with event index number of 2297917

Geocentric closest approach at 2022/01/01 13:33:57 UTC

J2000 position of star is 05:33:24.4 +34:26:25
Equinox of date position of star is 05:34:51.8 +34:27:14
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 171 degrees from the moon. Moon is 2% illuminated.
TNO apparent brightness V=22.0

[RECON map]
TNO is 17.6 AU from the Sun and 16.7 AU from the Earth.
The TNO is moving 23.9 km/sec on the sky relative to the star, or, 7.1 arcsec/hr.
The 1-sigma error in the time of the event is 118 seconds.
The 1-sigma cross-track error in the shadow position is 1879 km.
The sky-plane scale is 12111.1 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 3.2 sec chord
Diameter=31.0 km assuming a 30% albedo -- 1.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2022/01/01 13:34UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:11.1 +16:33:06  0.8 22.08 164
Alnath         05:27:41.1 +28:37:26  1.6  6.03 176
PPM 070537     05:35:06.1 +34:44:21  6.1  0.29 171
PPM 070509     05:33:40.5 +34:27:06  9.0  0.25 171
248835         05:34:52.1 +34:27:14 15.8       171
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 0.0 km RECON observability=0.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 13:30:33 -14.5 AT Down 13.6 309.5 Really Low 13:20:11 - 13:40:54 433
Kamloops 13:30:24 -22.9 Dark Down 20.2 300.1 Low 13:20:02 - 13:40:45 -263
Kelowna 13:30:22 -22.2 Dark Down 19.3 300.9 Really Low 13:20:00 - 13:40:43 -284
Dunrhomin 13:30:05 -10.0 NT Up 5.6 311.4 Really Low 13:19:44 - 13:40:27 -285
Peachland 13:30:21 -22.4 Dark Down 19.5 300.7 Really Low 13:20:00 - 13:40:43 -305
Summerland 13:30:21 -22.3 Dark Down 19.3 300.8 Really Low 13:20:00 - 13:40:43 -312
Penticton 13:30:21 -22.2 Dark Down 19.2 300.9 Really Low 13:19:59 - 13:40:42 -312
Oliver 13:30:20 -22.2 Dark Down 19.1 301.0 Really Low 13:19:58 - 13:40:41 -337
Anarchist Mountain Observatory 13:30:19 -22.0 Dark Down 18.9 301.2 Really Low 13:19:58 - 13:40:41 -341
Tonasket 13:30:19 -22.0 Dark Down 18.7 301.2 Really Low 13:19:57 - 13:40:40 -367
Okanogan 13:30:18 -22.1 Dark Down 18.7 301.2 Really Low 13:19:56 - 13:40:39 -399
Brewster 13:30:17 -22.2 Dark Down 18.6 301.2 Really Low 13:19:55 - 13:40:38 -427
Manson/Chelan 13:30:16 -22.4 Dark Down 18.7 301.0 Really Low 13:19:55 - 13:40:38 -459
Wenatchee 13:30:15 -22.4 Dark Down 18.6 301.1 Really Low 13:19:54 - 13:40:37 -502
Pasco 13:30:12 -21.4 Dark Down 17.3 302.1 Really Low 13:19:51 - 13:40:34 -536
Ellensburg 13:30:14 -22.5 Dark Down 18.5 301.0 Really Low 13:19:52 - 13:40:35 -543
PNWRO 13:30:12 -21.2 Dark Down 17.0 302.3 Really Low 13:19:50 - 13:40:33 -544
Victoria 13:30:18 -24.6 Dark Down 20.9 298.8 Low 13:19:57 - 13:40:40 -551
Yakima 13:30:13 -22.4 Dark Down 18.3 301.1 Really Low 13:19:51 - 13:40:34 -575
Toppenish/White Swan 13:30:12 -22.3 Dark Down 18.1 301.3 Really Low 13:19:51 - 13:40:34 -584
Goldendale 13:30:11 -22.5 Dark Down 18.1 301.2 Really Low 13:19:50 - 13:40:33 -645
The Dalles 13:30:11 -22.7 Dark Down 18.2 301.0 Really Low 13:19:49 - 13:40:32 -679
Maupin 13:30:10 -22.5 Dark Down 17.9 301.2 Really Low 13:19:48 - 13:40:31 -707
Redmond 13:30:07 -22.4 Dark Down 17.5 301.4 Really Low 13:19:46 - 13:40:29 -781
Sisters 13:30:08 -22.7 Dark Down 17.7 301.2 Really Low 13:19:46 - 13:40:29 -798
Bend 13:30:07 -22.5 Dark Down 17.5 301.4 Really Low 13:19:45 - 13:40:28 -805
Oregon Observatory 13:30:06 -22.6 Dark Down 17.5 301.3 Really Low 13:19:45 - 13:40:28 -825
La Pine/Gilchrist 13:30:06 -22.6 Dark Down 17.4 301.4 Really Low 13:19:45 - 13:40:28 -844
North Lake 13:30:05 -22.1 Dark Down 16.8 301.8 Really Low 13:19:43 - 13:40:26 -850
Paisley 13:30:04 -21.7 Dark Down 16.3 302.2 Really Low 13:19:42 - 13:40:25 -876
Lakeview 13:30:02 -21.4 Dark Down 15.9 302.4 Really Low 13:19:41 - 13:40:24 -907
Chiloquin 13:30:04 -22.6 Dark Down 17.0 301.4 Really Low 13:19:42 - 13:40:25 -949
Cedarville 13:30:01 -21.2 Dark Down 15.4 302.6 Really Low 13:19:40 - 13:40:23 -951
Klamath Falls 13:30:03 -22.5 Dark Down 16.8 301.6 Really Low 13:19:41 - 13:40:24 -973
Fall River/Burney 13:30:00 -22.0 Dark Down 15.9 302.1 Really Low 13:19:39 - 13:40:22 -1050
Susanville 13:29:59 -21.3 Dark Down 15.1 302.6 Really Low 13:19:37 - 13:40:20 -1064
Tonopah 13:29:54 -18.2 Dark Down 11.6 304.9 Really Low 13:19:33 - 13:40:16 -1080
Reno 13:29:57 -20.5 Dark Down 14.1 303.3 Really Low 13:19:36 - 13:40:19 -1093
Gimple 13:29:58 -21.4 Dark Down 15.1 302.6 Really Low 13:19:37 - 13:40:20 -1097
Greenville 13:29:58 -21.5 Dark Down 15.2 302.5 Really Low 13:19:37 - 13:40:20 -1101
Portola 13:29:57 -21.0 Dark Down 14.7 302.9 Really Low 13:19:36 - 13:40:19 -1104
Yerington 13:29:56 -19.9 Dark Down 13.4 303.7 Really Low 13:19:35 - 13:40:18 -1105
Patrick 13:29:51 -14.8 AT Down 7.9 307.0 Really Low 13:19:29 - 13:40:12 -1113
Hawthorne 13:29:55 -19.4 Dark Down 12.8 304.1 Really Low 13:19:34 - 13:40:17 -1115
Quincy 13:29:58 -21.4 Dark Down 15.1 302.6 Really Low 13:19:36 - 13:40:19 -1118
Indian Springs 13:29:52 -16.6 AT Down 9.8 305.9 Really Low 13:19:31 - 13:40:14 -1118
Carson City 13:29:56 -20.4 Dark Down 13.9 303.3 Really Low 13:19:35 - 13:40:18 -1121
Henderson 13:29:51 -15.9 AT Down 9.0 306.4 Really Low 13:19:30 - 13:40:13 -1124
George/Scottsdale 13:29:49 -12.7 AT Up 5.6 308.2 Really Low 13:19:27 - 13:40:10 -1137
Gardnerville 13:29:56 -20.3 Dark Down 13.8 303.4 Really Low 13:19:34 - 13:40:17 -1139
Kingman/Dolan Springs 13:29:50 -14.9 AT Down 7.9 306.9 Really Low 13:19:29 - 13:40:12 -1141
Beatty 13:29:53 -17.5 AT Down 10.7 305.3 Really Low 13:19:31 - 13:40:14 -1149
Laughlin/Bullhead City 13:29:50 -15.3 AT Down 8.2 306.7 Really Low 13:19:29 - 13:40:12 -1172
Lee Vining 13:29:54 -19.6 Dark Down 12.8 303.9 Really Low 13:19:33 - 13:40:16 -1186
Mohave Valley 13:29:50 -15.2 AT Down 8.1 306.7 Really Low 13:19:28 - 13:40:11 -1193
Bishop 13:29:53 -18.9 Dark Down 12.0 304.4 Really Low 13:19:31 - 13:40:14 -1198
Lake Havasu City 13:29:49 -14.9 AT Down 7.7 306.9 Really Low 13:19:28 - 13:40:11 -1212
Parker 13:29:49 -14.8 AT Down 7.4 306.9 Really Low 13:19:27 - 13:40:10 -1239
Blythe 13:29:47 -14.9 AT Down 7.3 306.8 Really Low 13:19:26 - 13:40:09 -1298
Yuma 13:29:46 -14.6 AT Down 6.8 306.9 Really Low 13:19:24 - 13:40:07 -1376
Calipatria 13:29:47 -15.5 AT Down 7.7 306.4 Really Low 13:19:25 - 13:40:08 -1390
Idyllwild 13:29:47 -16.6 AT Down 8.8 305.8 Really Low 13:19:26 - 13:40:09 -1405
Wildwood 13:29:47 -18.2 Dark Down 10.3 304.8 Really Low 13:19:26 - 13:40:09 -1479
CPSLO 13:29:49 -20.1 Dark Down 12.4 303.6 Really Low 13:19:28 - 13:40:11 -1488

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, (2022/01/01 13:34UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 22.08 164
Alnath         05:26:17.6 +28:36:23  1.6  6.03 176
PPM 070537     05:33:38.1 +34:43:32  6.1  0.29 171
PPM 070509     05:32:12.9 +34:26:14  9.0  0.25 171
248835         05:33:24.4 +34:26:25 15.8       171
Positions are for J2000

Event circumstances last updated at 2021/12/05 02:00:58 UT

Marc W. Buie, Southwest Research Institute

RECON