RECON: TNO occultation with 98WV31

Event between 98WV31 and star GA1140:01146186 with event index number of 1327110

Geocentric closest approach at 2023/12/02 06:45:49 UTC

J2000 position of star is 05:21:34.3 +25:24:04
Equinox of date position of star is 05:22:46.2 +25:25:08
Stellar brightness G=15.2, use SENSEUP=128
Star is 46 degrees from the moon. Moon is 77% illuminated.
TNO apparent brightness V=24.1

[RECON map]
TNO is 39.8 AU from the Sun and 38.9 AU from the Earth.
The TNO is moving 25.1 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 685 seconds.
The 1-sigma cross-track error in the shadow position is 3972 km.
The sky-plane scale is 28195.6 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=144.5 km assuming a 5% albedo -- 5.8 sec chord
Diameter=59.0 km assuming a 30% albedo -- 2.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 98WV31, (2023/12/02 06:46UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:17.7 +16:33:20  0.8 13.87  59
Alnath         05:27:48.4 +28:37:32  1.6  3.37  45
PPM 094294     05:22:29.6 +27:58:45  6.3  2.56  46
PPM 094241     05:18:59.3 +24:02:01  7.9  1.67  47
PPM 094280     05:21:46.3 +25:11:37  8.6  0.37  46
PPM 094307     05:23:40.2 +25:34:16 11.8  0.20  46
98WV31         05:23:02.8 +25:25:23 15.2        46
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 1.3 sigma about the mid-time.
The median site spacing is 23.4 km RECON observability=1.0 and success probability=7.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:46:58 -59.6 Dark Up 57.8 129.4 Up 06:31:58 - 07:01:58 -5385
Summerland 06:46:58 -59.8 Dark Up 57.8 128.6 Up 06:31:58 - 07:01:58 -5409
Penticton 06:46:58 -59.9 Dark Up 57.9 128.7 Up 06:31:58 - 07:01:58 -5417
Okanagan Falls 06:46:58 -60.1 Dark Up 58.0 128.4 Up 06:31:58 - 07:01:58 -5435
Oliver 06:46:58 -60.2 Dark Up 58.1 128.2 Up 06:31:58 - 07:01:58 -5451
Anarchist Mountain Observatory 06:46:58 -60.4 Dark Up 58.3 128.3 Up 06:31:58 - 07:01:58 -5471
Oroville 06:46:58 -60.5 Dark Up 58.3 128.1 Up 06:31:58 - 07:01:58 -5477
Tonasket 06:46:58 -60.7 Dark Up 58.5 127.8 Up 06:31:58 - 07:01:58 -5499
Okanogan 06:46:58 -60.9 Dark Up 58.6 127.1 Up 06:31:58 - 07:01:58 -5530
Brewster 06:46:58 -61.1 Dark Up 58.7 126.5 Up 06:31:58 - 07:01:58 -5553
Manson/Chelan 06:46:58 -61.1 Dark Up 58.6 125.7 Up 06:31:58 - 07:01:58 -5568
Entiat 06:46:58 -61.3 Dark Up 58.7 125.3 Up 06:31:58 - 07:01:58 -5589
Wenatchee 06:46:58 -61.5 Dark Up 58.8 124.8 Up 06:31:58 - 07:01:58 -5612
Ellensburg 06:46:58 -61.8 Dark Up 58.9 124.0 Up 06:31:58 - 07:01:58 -5650
Yakima 06:46:58 -62.1 Dark Up 59.1 123.4 Up 06:31:58 - 07:01:58 -5690
Toppenish/White Swan 06:46:58 -62.3 Dark Up 59.3 123.3 Up 06:31:58 - 07:01:58 -5714
Pasco 06:46:58 -62.9 Dark Up 60.1 124.9 Up 06:31:58 - 07:01:58 -5746
Goldendale 06:46:58 -62.6 Dark Up 59.4 122.0 Up 06:31:58 - 07:01:58 -5763
PNWRO 06:46:58 -63.2 Dark Up 60.4 124.9 Up 06:31:58 - 07:01:58 -5774
George/Umatilla 06:46:58 -63.1 Dark Up 60.2 124.1 Up 06:31:58 - 07:01:58 -5776
The Dalles 06:46:58 -62.7 Dark Up 59.2 121.1 Up 06:31:58 - 07:01:58 -5780
Maupin 06:47:12 -63.1 Dark Up 59.6 120.8 Up 06:32:12 - 07:02:12 -5814
Madras/Culver 06:47:13 -63.5 Dark Up 59.8 119.9 Up 06:32:13 - 07:02:13 -5867
Sisters 06:47:15 -63.6 Dark Up 59.7 118.8 Up 06:32:15 - 07:02:15 -5892
Redmond 06:47:13 -63.8 Dark Up 60.0 119.3 Up 06:32:13 - 07:02:13 -5902
Bend 06:47:14 -63.9 Dark Up 60.0 118.8 Up 06:32:14 - 07:02:14 -5921
Oregon Observatory 06:47:16 -64.0 Dark Up 60.0 118.4 Up 06:32:16 - 07:02:16 -5935
La Pine/Gilchrist 06:47:15 -64.1 Dark Up 60.0 118.0 Up 06:32:15 - 07:02:15 -5955
North Lake 06:47:14 -64.7 Dark Up 60.6 118.1 Up 06:32:14 - 07:02:14 -6010
Chiloquin 06:47:18 -64.8 Dark Up 60.3 115.8 Up 06:32:18 - 07:02:18 -6059
Paisley 06:47:15 -65.3 Dark Up 61.1 117.7 Up 06:32:15 - 07:02:15 -6072
Klamath Falls 06:47:19 -65.1 Dark Up 60.5 115.4 Up 06:32:19 - 07:02:19 -6095
Lakeview 06:47:15 -65.8 Dark Up 61.5 117.1 Up 06:32:15 - 07:02:15 -6127
Tulelake 06:47:19 -65.4 Dark Up 60.8 115.3 Up 06:32:19 - 07:02:19 -6128
Cedarville 06:47:15 -66.4 Dark Up 61.9 116.2 Up 06:32:15 - 07:02:15 -6197
Fall River/Burney 06:47:19 -66.2 Dark Up 61.3 113.9 Up 06:32:19 - 07:02:19 -6222
Susanville 06:47:18 -67.0 Dark Up 62.0 113.7 Up 06:32:18 - 07:02:18 -6301
Greenville 06:47:19 -67.1 Dark Up 62.0 112.9 Up 06:32:19 - 07:02:19 -6324
Gimple 06:47:19 -67.1 Dark Up 62.0 113.0 Up 06:32:19 - 07:02:19 -6325
Quincy 06:47:20 -67.2 Dark Up 62.0 112.6 Up 06:32:20 - 07:02:20 -6344
Portola 06:47:19 -67.6 Dark Up 62.4 112.9 Up 06:32:19 - 07:02:19 -6367
Reno 06:47:17 -68.1 Dark Up 63.0 113.2 Up 06:32:17 - 07:02:17 -6407
Carson City 06:47:17 -68.4 Dark Up 63.1 112.6 Up 06:32:17 - 07:02:17 -6445
Gardnerville 06:47:18 -68.6 Dark Up 63.3 112.2 Up 06:32:18 - 07:02:18 -6471
Yerington 06:47:16 -68.8 Dark Up 63.7 113.0 Up 06:32:16 - 07:02:16 -6477
Hawthorne 06:47:15 -69.5 Dark Up 64.2 112.8 Up 06:32:15 - 07:02:15 -6536
Niwot 06:46:31 -71.8 Dark Up 71.7 139.5 Up 06:31:31 - 07:01:31 -6580
Lee Vining 06:47:17 -69.6 Dark Up 64.1 111.1 Up 06:32:17 - 07:02:17 -6585
SwRI 06:46:31 -71.9 Dark Up 71.7 139.0 Up 06:31:31 - 07:01:31 -6590
Tonopah 06:46:58 -70.5 Dark Up 65.4 113.6 Up 06:31:58 - 07:01:58 -6620
Bishop 06:47:16 -70.5 Dark Up 64.8 110.8 Up 06:32:16 - 07:02:16 -6662
Lone Pine 06:47:16 -71.2 Dark Up 65.3 109.7 Up 06:32:16 - 07:02:16 -6748
Beatty 06:46:58 -71.6 Dark Up 66.2 111.8 Up 06:31:58 - 07:01:58 -6750
Indian Springs 06:46:58 -72.4 Dark Up 67.1 112.5 Up 06:31:58 - 07:01:58 -6801
CPSLO 06:47:25 -70.6 Dark Up 63.7 104.3 Up 06:32:25 - 07:02:25 -6830
Henderson 06:46:58 -73.2 Dark Up 67.8 112.3 Up 06:31:58 - 07:01:58 -6869
Searchlight/Boulder City 06:46:58 -73.7 Dark Up 68.1 111.0 Up 06:31:58 - 07:01:58 -6931
Patrick 06:46:58 -74.2 Dark Up 68.9 112.3 Up 06:31:58 - 07:01:58 -6953
Laughlin/Bullhead City 06:46:58 -74.1 Dark Up 68.4 110.8 Up 06:31:58 - 07:01:58 -6968
Kingman/Dolan Springs 06:46:58 -74.3 Dark Up 68.8 111.5 Up 06:31:58 - 07:01:58 -6974
DCO 06:46:58 -74.8 Dark Up 69.5 112.6 Up 06:31:58 - 07:01:58 -6998
Mohave Valley 06:46:58 -74.3 Dark Up 68.5 110.2 Up 06:31:58 - 07:01:58 -6998
Wildwood 06:47:20 -72.6 Dark Up 65.7 103.9 Up 06:32:20 - 07:02:20 -7001
Lake Havasu City 06:46:58 -74.7 Dark Up 68.9 109.5 Up 06:31:58 - 07:01:58 -7045
Idyllwild 06:47:15 -74.0 Dark Up 67.2 105.0 Up 06:32:15 - 07:02:15 -7078
Parker 06:46:58 -75.0 Dark Up 69.0 108.7 Up 06:31:58 - 07:01:58 -7083
Blythe 06:46:58 -75.3 Dark Up 68.9 107.0 Up 06:31:58 - 07:01:58 -7135
Calipatria 06:47:12 -75.2 Dark Up 68.3 104.8 Up 06:32:12 - 07:02:12 -7165
Yuma 06:46:58 -75.9 Dark Up 69.1 104.7 Up 06:31:58 - 07:01:58 -7234

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, (2023/12/02 06:46UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 13.87  59
Alnath         05:26:17.5 +28:36:23  1.6  3.37  45
PPM 094294     05:20:59.3 +27:57:25  6.3  2.56  46
PPM 094241     05:17:31.7 +24:00:34  7.9  1.67  47
PPM 094280     05:20:18.0 +25:10:16  8.6  0.37  46
PPM 094307     05:22:11.6 +25:32:58 11.8  0.20  46
98WV31         05:21:34.3 +25:24:04 15.2        46
Positions are for J2000

Event circumstances last updated at 2019/06/08 06:13:19 UT

Marc W. Buie, Southwest Research Institute

RECON