RECON: TNO occultation with 98UR43

Event between 98UR43 and star GA1180:02082040 with event index number of 1238932

Geocentric closest approach at 2023/01/21 09:49:52 UTC

J2000 position of star is 06:01:45.4 +28:56:36
Equinox of date position of star is 06:02:59.5 +28:56:32
Stellar brightness G=15.3, use SENSEUP=128
Star is 156 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=23.3

[RECON map]
TNO is 31.1 AU from the Sun and 30.2 AU from the Earth.
The TNO is moving 20.4 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 874 seconds.
The 1-sigma cross-track error in the shadow position is 3533 km.
The sky-plane scale is 21922.8 km/arcsec.

The TNO has an absolute magnitude Hv=8.3
Diameter=131.2 km assuming a 5% albedo -- 6.4 sec chord
Diameter=53.6 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 98UR43, (2023/01/21 09:50UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:25.2 +07:24:34  0.4 21.59 147
Alnath         05:27:45.1 +28:37:30  1.6  7.78 148
PPM 095117     05:58:01.7 +28:56:38  6.5  1.14 155
PPM 095222     06:02:05.0 +29:00:15  7.9  0.26 156
PPM 095236     06:02:46.0 +28:48:14 10.1  0.17 156
98UR43         06:03:13.3 +28:56:31 15.3       156
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 1.0 sigma about the mid-time.
The median site spacing is 17.3 km RECON observability=1.0 and success probability=8.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:46:58 -54.2 Dark Down 42.4 266.2 Up 09:31:58 - 10:01:58 -3281
Summerland 09:46:58 -54.6 Dark Down 42.6 266.3 Up 09:31:58 - 10:01:58 -3315
Penticton 09:46:57 -54.6 Dark Down 42.5 266.4 Up 09:31:57 - 10:01:57 -3317
Okanagan Falls 09:46:57 -54.7 Dark Down 42.5 266.6 Up 09:31:57 - 10:01:57 -3335
Oliver 09:46:56 -54.8 Dark Down 42.5 266.7 Up 09:31:56 - 10:01:56 -3348
Anarchist Mountain Observatory 09:46:55 -54.9 Dark Down 42.4 267.0 Up 09:31:55 - 10:01:55 -3358
Oroville 09:46:55 -55.0 Dark Down 42.5 267.0 Up 09:31:55 - 10:01:55 -3367
Tonasket 09:46:54 -55.1 Dark Down 42.5 267.3 Up 09:31:54 - 10:01:54 -3387
Okanogan 09:46:53 -55.5 Dark Down 42.6 267.5 Up 09:31:53 - 10:01:53 -3422
Brewster 09:46:53 -55.7 Dark Down 42.7 267.5 Up 09:31:53 - 10:01:53 -3452
Manson/Chelan 09:46:53 -56.1 Dark Down 43.0 267.5 Up 09:31:53 - 10:01:53 -3481
Entiat 09:46:52 -56.3 Dark Down 43.0 267.6 Up 09:31:52 - 10:01:52 -3503
Wenatchee 09:46:52 -56.5 Dark Down 43.1 267.8 Up 09:31:52 - 10:01:52 -3529
Ellensburg 09:46:51 -56.9 Dark Down 43.3 268.0 Up 09:31:51 - 10:01:51 -3572
Pasco 09:46:46 -56.8 Dark Down 42.3 269.7 Up 09:31:46 - 10:01:46 -3598
Yakima 09:46:50 -57.2 Dark Down 43.3 268.3 Up 09:31:50 - 10:01:50 -3610
PNWRO 09:46:45 -56.8 Dark Down 42.2 270.1 Up 09:31:45 - 10:01:45 -3614
Toppenish/White Swan 09:46:49 -57.3 Dark Down 43.2 268.7 Up 09:31:49 - 10:01:49 -3625
George/Umatilla 09:46:45 -57.1 Dark Down 42.5 269.9 Up 09:31:45 - 10:01:45 -3635
Niwot 09:46:02 -51.4 Dark Down 31.7 282.9 Up 09:31:02 - 10:01:02 -3673
SwRI 09:46:02 -51.5 Dark Down 31.7 282.9 Up 09:31:02 - 10:01:02 -3686
Goldendale 09:46:47 -57.9 Dark Down 43.5 268.9 Up 09:31:47 - 10:01:47 -3688
The Dalles 09:46:48 -58.2 Dark Down 43.8 268.8 Up 09:31:48 - 10:01:48 -3719
Maupin 09:46:47 -58.5 Dark Down 43.7 269.3 Up 09:31:47 - 10:01:47 -3755
Madras/Culver 09:46:45 -58.9 Dark Down 43.8 269.8 Up 09:31:45 - 10:01:45 -3807
Redmond 09:46:44 -59.2 Dark Down 43.8 270.1 Up 09:31:44 - 10:01:44 -3842
Sisters 09:46:45 -59.4 Dark Down 44.1 269.8 Up 09:31:45 - 10:01:45 -3852
Bend 09:46:44 -59.4 Dark Down 43.9 270.2 Up 09:31:44 - 10:01:44 -3866
Oregon Observatory 09:46:44 -59.6 Dark Down 44.0 270.3 Up 09:31:44 - 10:01:44 -3886
La Pine/Gilchrist 09:46:43 -59.8 Dark Down 44.0 270.4 Up 09:31:43 - 10:01:43 -3907
North Lake 09:46:41 -59.8 Dark Down 43.6 271.3 Up 09:31:41 - 10:01:41 -3930
Paisley 09:46:38 -59.9 Dark Down 43.3 272.0 Up 09:31:38 - 10:01:38 -3971
Lakeview 09:46:36 -60.2 Dark Down 43.2 272.6 Up 09:31:36 - 10:01:36 -4012
Chiloquin 09:46:41 -60.7 Dark Down 44.3 271.3 Up 09:31:41 - 10:01:41 -4023
Klamath Falls 09:46:40 -60.9 Dark Down 44.2 271.7 Up 09:31:40 - 10:01:40 -4053
Cedarville 09:46:34 -60.5 Dark Down 43.0 273.3 Up 09:31:34 - 10:01:34 -4069
Tulelake 09:46:38 -61.0 Dark Down 44.0 272.1 Up 09:31:38 - 10:01:38 -4070
Fall River/Burney 09:46:36 -61.5 Dark Down 43.9 273.0 Up 09:31:36 - 10:01:36 -4154
Susanville 09:46:32 -61.5 Dark Down 43.3 274.1 Up 09:31:32 - 10:01:32 -4191
Gimple 09:46:32 -61.8 Dark Down 43.4 274.2 Up 09:31:32 - 10:01:32 -4224
Greenville 09:46:32 -61.9 Dark Down 43.5 274.1 Up 09:31:32 - 10:01:32 -4226
Portola 09:46:30 -61.8 Dark Down 43.1 274.7 Up 09:31:30 - 10:01:30 -4243
Quincy 09:46:32 -62.0 Dark Down 43.5 274.3 Up 09:31:32 - 10:01:32 -4246
Reno 09:46:28 -61.5 Dark Down 42.6 275.3 Up 09:31:28 - 10:01:28 -4247
Yerington 09:46:25 -61.5 Dark Down 42.1 276.2 Up 09:31:25 - 10:01:25 -4278
Carson City 09:46:27 -61.7 Dark Down 42.6 275.7 Up 09:31:27 - 10:01:27 -4281
Tonopah 09:46:18 -60.7 Dark Down 40.5 278.1 Up 09:31:18 - 10:01:18 -4301
Gardnerville 09:46:26 -61.9 Dark Down 42.5 275.9 Up 09:31:26 - 10:01:26 -4303
Hawthorne 09:46:23 -61.4 Dark Down 41.6 276.9 Up 09:31:23 - 10:01:23 -4305
Lee Vining 09:46:22 -62.0 Dark Down 41.9 277.2 Up 09:31:22 - 10:01:22 -4376
Indian Springs 09:46:11 -60.4 Dark Down 39.0 280.0 Up 09:31:11 - 10:01:11 -4389
Beatty 09:46:14 -61.0 Dark Down 39.9 279.2 Up 09:31:14 - 10:01:14 -4396
Bishop 09:46:19 -61.9 Dark Down 41.3 278.0 Up 09:31:19 - 10:01:19 -4409
Henderson 09:46:08 -60.1 Dark Down 38.4 280.8 Up 09:31:08 - 10:01:08 -4415
Patrick 09:46:04 -59.5 Dark Down 37.4 281.8 Up 09:31:04 - 10:01:04 -4434
DCO 09:46:01 -59.1 Dark Down 36.8 282.3 Up 09:31:01 - 10:01:01 -4436
Kingman/Dolan Springs 09:46:04 -59.8 Dark Down 37.5 281.8 Up 09:31:04 - 10:01:04 -4462
Searchlight/Boulder City 09:46:07 -60.3 Dark Down 38.2 281.3 Up 09:31:07 - 10:01:07 -4468
Lone Pine 09:46:16 -62.0 Dark Down 40.9 278.9 Up 09:31:16 - 10:01:16 -4471
Laughlin/Bullhead City 09:46:05 -60.2 Dark Down 37.9 281.6 Up 09:31:05 - 10:01:05 -4484
Mohave Valley 09:46:04 -60.3 Dark Down 37.9 281.8 Up 09:31:04 - 10:01:04 -4510
Lake Havasu City 09:46:02 -60.2 Dark Down 37.6 282.2 Up 09:31:02 - 10:01:02 -4539
Parker 09:46:01 -60.3 Dark Down 37.5 282.5 Up 09:31:01 - 10:01:01 -4572
Blythe 09:46:01 -60.8 Dark Down 37.6 282.8 Up 09:31:01 - 10:01:01 -4634
CPSLO 09:46:19 -64.5 Dark Down 42.8 278.8 Up 09:31:19 - 10:01:19 -4688
Idyllwild 09:46:06 -62.3 Dark Down 39.3 281.8 Up 09:31:06 - 10:01:06 -4702
Calipatria 09:46:02 -61.7 Dark Down 38.3 282.8 Up 09:31:02 - 10:01:02 -4717
Yuma 09:45:58 -61.1 Dark Down 37.4 283.5 Up 09:30:58 - 10:00:58 -4725
Wildwood 09:46:12 -63.6 Dark Down 40.9 280.8 Up 09:31:12 - 10:01:12 -4735

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 98UR43, (2023/01/21 09:50UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 21.59 147
Alnath         05:26:17.5 +28:36:23  1.6  7.78 148
PPM 095117     05:56:33.8 +28:56:32  6.5  1.14 155
PPM 095222     06:00:37.0 +29:00:18  7.9  0.26 156
PPM 095236     06:01:18.2 +28:48:18 10.1  0.17 156
98UR43         06:01:45.4 +28:56:36 15.3       156
Positions are for J2000

Event circumstances last updated at 2019/06/08 04:38:49 UT

Marc W. Buie, Southwest Research Institute

RECON