RECON: TNO occultation with 248835

Event between (248835) 06SX368 and star GA1220:01754758 with event index number of 2297949

Geocentric closest approach at 2022/02/25 06:14:25 UTC

J2000 position of star is 05:26:03.1 +33:31:41
Equinox of date position of star is 05:27:29.7 +33:32:45
Stellar brightness G=12.7, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 172 degrees from the moon. Moon is 35% illuminated.
TNO apparent brightness V=22.2

[RECON map]
TNO is 17.7 AU from the Sun and 17.4 AU from the Earth.
The TNO is moving 9.6 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 207 seconds.
The 1-sigma cross-track error in the shadow position is 2691 km.
The sky-plane scale is 12640.7 km/arcsec.

The TNO has an absolute magnitude Hv=9.5
Diameter=75.9 km assuming a 5% albedo -- 7.9 sec chord
Diameter=31.0 km assuming a 30% albedo -- 3.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 248835, (2022/02/25 06:14UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:11.7 +16:33:07  0.8 20.42 164
Alnath         05:27:41.6 +28:37:27  1.6  4.92 177
19 Aur         05:21:28.7 +33:58:45  5.0  1.33 171
PPM 070359     05:28:18.6 +33:16:46  7.5  0.31 172
PPM 070310     05:26:08.7 +33:40:01  8.9  0.31 172
PPM 070357     05:28:15.2 +33:41:57 10.1  0.22 172
248835         05:27:30.6 +33:32:45 12.7       172
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 4.3 sigma about the mid-time.
The median site spacing is 22.6 km RECON observability=1.0 and success probability=4.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 06:08:46 -41.0 Dark Down 53.0 260.2 Up 05:53:46 - 06:23:46 -5435
Victoria 06:09:15 -41.2 Dark Down 55.2 260.4 Up 05:54:15 - 06:24:15 -5481
Peachland 06:08:50 -42.0 Dark Down 52.7 261.9 Up 05:53:50 - 06:23:50 -5537
Kelowna 06:08:47 -42.0 Dark Down 52.5 262.1 Up 05:53:47 - 06:23:47 -5540
Summerland 06:08:51 -42.1 Dark Down 52.7 262.2 Up 05:53:51 - 06:23:51 -5553
Penticton 06:08:52 -42.2 Dark Down 52.6 262.4 Up 05:53:52 - 06:23:52 -5563
Oliver 06:08:53 -42.5 Dark Down 52.6 262.9 Up 05:53:53 - 06:23:53 -5593
Anarchist Mountain Observatory 06:08:55 -42.7 Dark Down 52.5 263.3 Up 05:53:55 - 06:23:55 -5615
Tonasket 06:08:56 -42.9 Dark Down 52.6 263.6 Up 05:53:56 - 06:23:56 -5638
Okanogan 06:09:00 -43.1 Dark Down 52.7 263.9 Up 05:54:00 - 06:24:00 -5660
Brewster 06:09:05 -43.2 Dark Down 52.9 264.1 Up 05:54:05 - 06:24:05 -5674
Manson/Chelan 06:09:06 -43.2 Dark Down 53.1 264.1 Up 05:54:06 - 06:24:06 -5675
Wenatchee 06:09:12 -43.4 Dark Down 53.3 264.6 Up 05:54:12 - 06:24:12 -5707
Ellensburg 06:09:14 -43.6 Dark Down 53.5 265.0 Up 05:54:14 - 06:24:14 -5731
Yakima 06:09:15 -43.9 Dark Down 53.5 265.5 Up 05:54:15 - 06:24:15 -5764
Sleaford 06:07:40 -44.8 Dark Down 44.0 270.5 Up 05:52:40 - 06:22:40 -5784
Toppenish/White Swan 06:09:15 -44.1 Dark Down 53.4 266.0 Up 05:54:15 - 06:24:15 -5789
Goldendale 06:09:24 -44.3 Dark Down 53.7 266.4 Up 05:54:24 - 06:24:24 -5814
The Dalles 06:09:26 -44.3 Dark Down 54.0 266.4 Up 05:54:26 - 06:24:26 -5816
Pasco 06:09:13 -44.8 Dark Down 52.5 267.1 Up 05:54:13 - 06:24:13 -5853
Maupin 06:09:31 -44.6 Dark Down 53.9 267.1 Up 05:54:31 - 06:24:31 -5854
PNWRO 06:09:14 -45.1 Dark Down 52.4 267.6 Up 05:54:14 - 06:24:14 -5884
Sisters 06:09:40 -45.0 Dark Down 54.3 268.0 Up 05:54:40 - 06:24:40 -5901
Redmond 06:09:40 -45.2 Dark Down 54.0 268.3 Up 05:54:40 - 06:24:40 -5922
Bend 06:09:39 -45.3 Dark Down 54.1 268.5 Up 05:54:39 - 06:24:39 -5932
Oregon Observatory 06:09:40 -45.3 Dark Down 54.2 268.7 Up 05:54:40 - 06:24:40 -5940
La Pine/Gilchrist 06:09:43 -45.4 Dark Down 54.2 268.9 Up 05:54:43 - 06:24:43 -5953
North Lake 06:09:45 -46.1 Dark Down 53.8 269.9 Up 05:54:45 - 06:24:45 -6016
Chiloquin 06:09:54 -46.0 Dark Down 54.5 270.2 Up 05:54:54 - 06:24:54 -6023
Klamath Falls 06:09:56 -46.3 Dark Down 54.4 270.8 Up 05:54:56 - 06:24:56 -6053
Paisley 06:09:49 -46.6 Dark Down 53.5 270.9 Up 05:54:49 - 06:24:49 -6076
Lakeview 06:09:48 -47.1 Dark Down 53.4 271.7 Up 05:54:48 - 06:24:48 -6124
Fall River/Burney 06:10:08 -47.3 Dark Down 54.0 272.7 Up 05:55:08 - 06:25:08 -6162
Cedarville 06:09:56 -47.6 Dark Down 53.2 272.8 Up 05:54:56 - 06:24:56 -6184
Susanville 06:10:04 -48.1 Dark Down 53.5 274.0 Up 05:55:04 - 06:25:04 -6246
Greenville 06:10:08 -48.1 Dark Down 53.6 274.2 Up 05:55:08 - 06:25:08 -6253
Gimple 06:10:08 -48.1 Dark Down 53.6 274.2 Up 05:55:08 - 06:25:08 -6257
Quincy 06:10:12 -48.2 Dark Down 53.6 274.5 Up 05:55:12 - 06:25:12 -6268
Portola 06:10:10 -48.6 Dark Down 53.3 274.9 Up 05:55:10 - 06:25:10 -6301
Reno 06:10:08 -49.1 Dark Down 52.7 275.6 Up 05:55:08 - 06:25:08 -6353
Carson City 06:10:12 -49.4 Dark Down 52.7 276.1 Up 05:55:12 - 06:25:12 -6381
Gardnerville 06:10:14 -49.6 Dark Down 52.6 276.4 Up 05:55:14 - 06:25:14 -6402
Yerington 06:10:08 -49.9 Dark Down 52.2 276.7 Up 05:55:08 - 06:25:08 -6426
Hawthorne 06:10:13 -50.5 Dark Down 51.7 277.5 Up 05:55:13 - 06:25:13 -6487
Lee Vining 06:10:19 -50.6 Dark Down 52.0 278.0 Up 05:55:19 - 06:25:19 -6507
Bishop 06:10:20 -51.4 Dark Down 51.3 279.1 Up 05:55:20 - 06:25:20 -6586
Tonopah 06:10:08 -51.7 Dark Down 50.5 278.8 Up 05:55:08 - 06:25:08 -6589
CPSLO 06:10:47 -51.3 Dark Down 52.7 280.8 Up 05:55:47 - 06:25:47 -6624
Beatty 06:10:17 -52.7 Dark Down 50.0 280.4 Up 05:55:17 - 06:25:17 -6697
Indian Springs 06:10:11 -53.6 Dark Down 49.1 281.2 Up 05:55:11 - 06:25:11 -6771
Wildwood 06:10:47 -53.4 Dark Down 50.8 283.0 Up 05:55:47 - 06:25:47 -6815
Henderson 06:10:15 -54.3 Dark Down 48.4 282.1 Up 05:55:15 - 06:25:15 -6842
Dunrhomin 06:08:55 -55.7 Dark Down 42.0 282.2 Up 05:53:55 - 06:23:55 -6867
Laughlin/Bullhead City 06:10:17 -55.2 Dark Down 47.9 283.2 Up 05:55:17 - 06:25:17 -6925
Idyllwild 06:10:43 -54.8 Dark Down 49.2 284.1 Up 05:55:43 - 06:25:43 -6934
Patrick 06:10:11 -55.4 Dark Down 47.4 283.2 Up 05:55:11 - 06:25:11 -6938
Mohave Valley 06:10:18 -55.4 Dark Down 47.8 283.5 Up 05:55:18 - 06:25:18 -6946
Kingman/Dolan Springs 06:10:13 -55.5 Dark Down 47.5 283.4 Up 05:55:13 - 06:25:13 -6947
Lake Havasu City 06:10:24 -55.8 Dark Down 47.5 284.0 Up 05:55:24 - 06:25:24 -6987
Parker 06:10:24 -56.1 Dark Down 47.4 284.4 Up 05:55:24 - 06:25:24 -7014
Calipatria 06:10:43 -56.0 Dark Down 48.0 285.1 Up 05:55:43 - 06:25:43 -7032
Blythe 06:10:32 -56.2 Dark Down 47.5 284.9 Up 05:55:32 - 06:25:32 -7039
Yuma 06:10:38 -56.8 Dark Down 47.2 285.8 Up 05:55:38 - 06:25:38 -7105
George/Scottsdale 06:10:15 -57.8 Dark Down 45.3 285.6 Up 05:55:15 - 06:25:15 -7150

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, (2022/02/25 06:14UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 20.42 164
Alnath         05:26:17.6 +28:36:23  1.6  4.92 177
19 Aur         05:20:00.9 +33:57:29  5.0  1.33 171
PPM 070359     05:26:51.3 +33:15:44  7.5  0.31 172
PPM 070310     05:24:41.1 +33:38:54  8.9  0.31 172
PPM 070357     05:26:47.6 +33:40:54 10.1  0.22 172
248835         05:26:03.1 +33:31:41 12.7       172
Positions are for J2000

Event circumstances last updated at 2021/12/05 02:04:35 UT

Marc W. Buie, Southwest Research Institute

RECON