RECON: TNO occultation with 98WV31

Event between 98WV31 and star GA1140:00976574 with event index number of 1141858

Geocentric closest approach at 2022/01/02 03:12:01 UTC

J2000 position of star is 05:06:12.3 +24:52:04
Equinox of date position of star is 05:07:23.8 +24:53:33
Stellar brightness G=11.8, use SENSEUP=8
Star is 165 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=24.1

[RECON map]
TNO is 39.3 AU from the Sun and 38.4 AU from the Earth.
The TNO is moving 23.2 km/sec on the sky relative to the star, or, 3.0 arcsec/hr.
The 1-sigma error in the time of the event is 445 seconds.
The 1-sigma cross-track error in the shadow position is 2465 km.
The sky-plane scale is 27862.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=144.5 km assuming a 5% albedo -- 6.2 sec chord
Diameter=59.0 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 98WV31, (2022/01/02 03:12UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:11.1 +16:33:07  0.8 10.95 156
Alnath         05:27:41.1 +28:37:27  1.6  5.84 170
103 Tau        05:09:27.2 +24:17:32  5.3  0.74 166
PPM 094048     05:06:32.3 +23:49:40  8.3  1.09 165
PPM 094067     05:08:03.2 +24:38:43 10.0  0.28 165
PPM 094069     05:08:07.1 +24:44:00 11.1  0.21 165
98WV31         05:07:33.3 +24:53:45 11.8       165
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 2.0 sigma about the mid-time.
The median site spacing is 19.2 km RECON observability=1.0 and success probability=12.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 03:13:54 -28.9 Dark Down 46.9 108.2 Up 02:58:54 - 03:28:54 -2426
Summerland 03:13:56 -28.7 Dark Down 46.8 107.6 Up 02:58:56 - 03:28:56 -2444
Penticton 03:13:56 -28.7 Dark Down 46.9 107.7 Up 02:58:56 - 03:28:56 -2453
Okanagan Falls 03:13:56 -28.7 Dark Down 46.9 107.5 Up 02:58:56 - 03:28:56 -2468
Oliver 03:13:57 -28.7 Dark Down 47.0 107.3 Up 02:58:57 - 03:28:57 -2482
Anarchist Mountain Observatory 03:13:57 -28.8 Dark Down 47.2 107.3 Up 02:58:57 - 03:28:57 -2502
Oroville 03:13:57 -28.8 Dark Down 47.1 107.2 Up 02:58:57 - 03:28:57 -2507
Tonasket 03:13:58 -28.8 Dark Down 47.2 107.0 Up 02:58:58 - 03:28:58 -2527
Okanogan 03:13:59 -28.7 Dark Down 47.2 106.5 Up 02:58:59 - 03:28:59 -2551
Brewster 03:14:00 -28.5 Dark Down 47.2 106.0 Up 02:59:00 - 03:29:00 -2569
Manson/Chelan 03:14:02 -28.3 Dark Down 47.0 105.4 Up 02:59:02 - 03:29:02 -2577
Entiat 03:14:02 -28.2 Dark Down 47.0 105.2 Up 02:59:02 - 03:29:02 -2594
Wenatchee 03:14:03 -28.1 Dark Down 47.0 104.8 Up 02:59:03 - 03:29:03 -2613
Ellensburg 03:14:05 -28.0 Dark Down 47.0 104.2 Up 02:59:05 - 03:29:05 -2643
Yakima 03:14:07 -27.9 Dark Down 47.1 103.7 Up 02:59:07 - 03:29:07 -2678
Toppenish/White Swan 03:14:07 -28.0 Dark Down 47.2 103.7 Up 02:59:07 - 03:29:07 -2702
Goldendale 03:14:09 -27.7 Dark Down 47.1 102.7 Up 02:59:09 - 03:29:09 -2738
The Dalles 03:14:10 -27.4 Dark Down 46.9 102.2 Up 02:59:10 - 03:29:10 -2747
Pasco 03:14:04 -28.9 Dark Down 48.1 104.7 Up 02:59:04 - 03:29:04 -2748
George/Umatilla 03:14:05 -28.7 Dark Down 48.0 104.1 Up 02:59:05 - 03:29:05 -2771
PNWRO 03:14:04 -29.0 Dark Down 48.3 104.6 Up 02:59:04 - 03:29:04 -2776
Maupin 03:14:11 -27.4 Dark Down 47.0 101.8 Up 02:59:11 - 03:29:11 -2787
Madras/Culver 03:14:13 -27.4 Dark Down 47.1 101.2 Up 02:59:13 - 03:29:13 -2834
Sisters 03:14:15 -27.0 Dark Down 46.9 100.5 Up 02:59:15 - 03:29:15 -2850
Redmond 03:14:14 -27.3 Dark Down 47.1 100.8 Up 02:59:14 - 03:29:14 -2864
Bend 03:14:15 -27.2 Dark Down 47.1 100.5 Up 02:59:15 - 03:29:15 -2879
Oregon Observatory 03:14:16 -27.1 Dark Down 47.0 100.2 Up 02:59:16 - 03:29:16 -2891
La Pine/Gilchrist 03:14:16 -27.0 Dark Down 47.0 99.9 Up 02:59:16 - 03:29:16 -2907
North Lake 03:14:16 -27.4 Dark Down 47.5 99.9 Up 02:59:16 - 03:29:16 -2964
Chiloquin 03:14:20 -26.6 Dark Down 47.0 98.5 Up 02:59:20 - 03:29:20 -2996
Paisley 03:14:17 -27.6 Dark Down 47.9 99.6 Up 02:59:17 - 03:29:17 -3025
Klamath Falls 03:14:21 -26.6 Dark Down 47.1 98.2 Up 02:59:21 - 03:29:21 -3030
Tulelake 03:14:21 -26.8 Dark Down 47.3 98.1 Up 02:59:21 - 03:29:21 -3064
Lakeview 03:14:18 -27.7 Dark Down 48.1 99.2 Up 02:59:18 - 03:29:18 -3077
Cedarville 03:14:19 -27.7 Dark Down 48.4 98.7 Up 02:59:19 - 03:29:19 -3142
Fall River/Burney 03:14:24 -26.7 Dark Down 47.5 97.2 Up 02:59:24 - 03:29:24 -3149
Susanville 03:14:23 -27.2 Dark Down 48.2 97.1 Up 02:59:23 - 03:29:23 -3230
Greenville 03:14:25 -27.0 Dark Down 48.0 96.5 Up 02:59:25 - 03:29:25 -3246
Gimple 03:14:25 -27.0 Dark Down 48.0 96.6 Up 02:59:25 - 03:29:25 -3249
Quincy 03:14:25 -26.9 Dark Down 48.0 96.3 Up 02:59:25 - 03:29:25 -3265
Portola 03:14:24 -27.3 Dark Down 48.4 96.5 Up 02:59:24 - 03:29:24 -3292
Reno 03:14:24 -27.7 Dark Down 48.9 96.7 Up 02:59:24 - 03:29:24 -3337
Carson City 03:14:24 -27.7 Dark Down 49.0 96.3 Up 02:59:24 - 03:29:24 -3371
Gardnerville 03:14:25 -27.7 Dark Down 49.0 96.1 Up 02:59:25 - 03:29:25 -3396
Yerington 03:14:23 -28.2 Dark Down 49.5 96.6 Up 02:59:23 - 03:29:23 -3409
Hawthorne 03:14:23 -28.5 Dark Down 49.9 96.4 Up 02:59:23 - 03:29:23 -3470
Lee Vining 03:14:26 -28.1 Dark Down 49.6 95.4 Up 02:59:26 - 03:29:26 -3508
Tonopah 03:14:20 -29.5 Dark Down 51.1 96.9 Up 02:59:20 - 03:29:20 -3558
Bishop 03:14:25 -28.5 Dark Down 50.2 95.2 Up 02:59:25 - 03:29:25 -3588
Lone Pine 03:14:26 -28.7 Dark Down 50.6 94.5 Up 02:59:26 - 03:29:26 -3672
Beatty 03:14:22 -29.8 Dark Down 51.6 95.8 Up 02:59:22 - 03:29:22 -3684
Niwot 03:13:42 -38.9 Dark Down 59.6 110.4 Up 02:58:42 - 03:28:42 -3696
SwRI 03:13:43 -38.8 Dark Down 59.5 110.1 Up 02:58:43 - 03:28:43 -3704
CPSLO 03:14:36 -26.4 Dark Down 48.6 91.4 Up 02:59:36 - 03:29:36 -3712
Indian Springs 03:14:19 -30.6 Dark Down 52.5 96.1 Up 02:59:19 - 03:29:19 -3749
Henderson 03:14:19 -31.1 Dark Down 53.1 95.9 Up 02:59:19 - 03:29:19 -3823
Searchlight/Boulder City 03:14:20 -31.0 Dark Down 53.2 95.2 Up 02:59:20 - 03:29:20 -3881
Wildwood 03:14:33 -27.9 Dark Down 50.3 91.2 Up 02:59:33 - 03:29:33 -3898
Patrick 03:14:18 -31.9 Dark Down 54.0 95.8 Up 02:59:18 - 03:29:18 -3919
Laughlin/Bullhead City 03:14:20 -31.3 Dark Down 53.5 95.0 Up 02:59:20 - 03:29:20 -3921
Kingman/Dolan Springs 03:14:18 -31.7 Dark Down 53.9 95.4 Up 02:59:18 - 03:29:18 -3935
Mohave Valley 03:14:21 -31.3 Dark Down 53.5 94.6 Up 02:59:21 - 03:29:21 -3948
DCO 03:14:16 -32.4 Dark Down 54.6 95.9 Up 02:59:16 - 03:29:16 -3971
Idyllwild 03:14:29 -29.4 Dark Down 51.8 91.8 Up 02:59:29 - 03:29:29 -3995
Lake Havasu City 03:14:21 -31.4 Dark Down 53.8 94.3 Up 02:59:21 - 03:29:21 -3995
Parker 03:14:22 -31.4 Dark Down 53.8 93.8 Up 02:59:22 - 03:29:22 -4031
Blythe 03:14:23 -31.1 Dark Down 53.6 92.9 Up 02:59:23 - 03:29:23 -4074
Calipatria 03:14:27 -30.2 Dark Down 52.8 91.7 Up 02:59:27 - 03:29:27 -4093
Yuma 03:14:25 -30.9 Dark Down 53.6 91.6 Up 02:59:25 - 03:29:25 -4165

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 98WV31, (2022/01/02 03:12UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 10.95 156
Alnath         05:26:17.5 +28:36:23  1.6  5.84 170
103 Tau        05:08:06.6 +24:15:54  5.3  0.74 166
PPM 094048     05:05:12.0 +23:47:56  8.3  1.09 165
PPM 094067     05:06:42.5 +24:37:03 10.0  0.28 165
PPM 094069     05:06:46.3 +24:42:20 11.1  0.21 165
98WV31         05:06:12.3 +24:52:04 11.8       165
Positions are for J2000

Event circumstances last updated at 2019/06/08 02:53:16 UT

Marc W. Buie, Southwest Research Institute

RECON