RECON: TNO occultation with 98WV31

Event between 98WV31 and star GA1140:00979917 with event index number of 362078

Geocentric closest approach at 2020/10/16 10:09:23 UTC

J2000 position of star is 05:06:32.7 +24:41:38
Equinox of date position of star is 05:07:41.9 +24:43:04
Stellar brightness G=17.0, use SENSEUP=128
Star is 120 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=24.1

[RECON map]
TNO is 39.0 AU from the Sun and 38.4 AU from the Earth.
The TNO is moving 13.2 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 623 seconds.
The 1-sigma cross-track error in the shadow position is 2103 km.
The sky-plane scale is 27850.9 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=144.5 km assuming a 5% albedo -- 11.0 sec chord
Diameter=59.0 km assuming a 30% albedo -- 4.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 98WV31, (2020/10/16 10:09UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:07.0 +16:32:58  0.8 10.87 128
Alnath         05:27:36.5 +28:37:23  1.6  5.90 115
103 Tau        05:09:22.8 +24:17:27  5.3  0.56 119
PPM 094048     05:06:27.9 +23:49:34  8.3  0.95 120
PPM 094067     05:07:58.8 +24:38:37 10.0  0.08 120
PPM 094069     05:08:02.7 +24:43:55 11.1  0.05 120
98WV31         05:07:49.1 +24:43:13 17.0       119
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 1.4 sigma about the mid-time.
The median site spacing is 23.7 km RECON observability=1.0 and success probability=18.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 10:11:01 -39.0 Dark Down 61.2 144.6 Up 09:56:01 - 10:26:01 3221
Summerland 10:11:03 -39.2 Dark Down 61.1 143.9 Up 09:56:03 - 10:26:03 3220
Penticton 10:11:03 -39.3 Dark Down 61.5 143.9 Up 09:56:03 - 10:26:03 3186
Okanagan Falls 10:11:03 -39.4 Dark Down 61.6 143.7 Up 09:56:03 - 10:26:03 3168
Oliver 10:11:03 -39.5 Dark Down 61.7 143.5 Up 09:56:03 - 10:26:03 3151
Anarchist Mountain Observatory 10:11:03 -39.5 Dark Down 62.0 143.7 Up 09:56:03 - 10:26:03 3132
Oroville 10:11:04 -39.6 Dark Down 62.0 143.5 Up 09:56:04 - 10:26:04 3126
Tonasket 10:11:04 -39.8 Dark Down 62.2 143.2 Up 09:56:04 - 10:26:04 3102
Okanogan 10:11:05 -40.1 Dark Down 62.4 142.6 Up 09:56:05 - 10:26:05 3070
Brewster 10:11:07 -40.3 Dark Down 62.5 141.9 Up 09:56:07 - 10:26:07 3045
Manson/Chelan 10:11:09 -40.7 Dark Down 62.5 141.0 Up 09:56:09 - 10:26:09 3027
Entiat 10:11:10 -40.8 Dark Down 62.7 140.6 Up 09:56:10 - 10:26:10 3006
Wenatchee 10:11:11 -41.0 Dark Down 62.8 140.2 Up 09:56:11 - 10:26:11 2981
Ellensburg 10:11:13 -41.4 Dark Down 63.1 139.3 Up 09:56:13 - 10:26:13 2942
Yakima 10:11:13 -41.7 Dark Down 63.4 138.7 Up 09:56:13 - 10:26:13 2901
Toppenish/White Swan 10:11:14 -41.7 Dark Down 63.6 138.7 Up 09:56:14 - 10:26:14 2877
Pasco 10:11:06 -41.1 Dark Down 64.2 140.8 Up 09:56:06 - 10:26:06 2852
Goldendale 10:11:17 -42.3 Dark Down 63.8 137.3 Up 09:56:17 - 10:26:17 2825
PNWRO 10:11:05 -41.2 Dark Down 64.5 140.9 Up 09:56:05 - 10:26:05 2825
George/Umatilla 10:11:08 -41.4 Dark Down 64.4 140.0 Up 09:56:08 - 10:26:08 2820
The Dalles 10:11:19 -42.6 Dark Down 63.8 136.3 Up 09:56:19 - 10:26:19 2806
Maupin 10:11:20 -42.8 Dark Down 64.2 135.9 Up 09:56:20 - 10:26:20 2762
Madras/Culver 10:11:20 -43.2 Dark Down 64.5 135.0 Up 09:56:20 - 10:26:20 2707
Sisters 10:11:24 -43.7 Dark Down 64.5 133.8 Up 09:56:24 - 10:26:24 2678
Redmond 10:11:21 -43.4 Dark Down 64.8 134.4 Up 09:56:21 - 10:26:21 2671
Bend 10:11:23 -43.7 Dark Down 64.8 133.9 Up 09:56:23 - 10:26:23 2650
Oregon Observatory 10:11:24 -43.8 Dark Down 64.9 133.4 Up 09:56:24 - 10:26:24 2634
La Pine/Gilchrist 10:11:25 -44.0 Dark Down 65.0 133.0 Up 09:56:25 - 10:26:25 2613
North Lake 10:11:23 -43.9 Dark Down 65.6 133.3 Up 09:56:23 - 10:26:23 2562
Chiloquin 10:11:28 -44.9 Dark Down 65.6 130.6 Up 09:56:28 - 10:26:28 2502
Paisley 10:11:22 -44.0 Dark Down 66.2 133.1 Up 09:56:22 - 10:26:22 2500
Klamath Falls 10:11:30 -45.0 Dark Down 65.8 130.1 Up 09:56:30 - 10:26:30 2466
Lakeview 10:11:20 -44.2 Dark Down 66.6 132.5 Up 09:56:20 - 10:26:20 2445
Tulelake 10:11:28 -45.0 Dark Down 66.2 130.2 Up 09:56:28 - 10:26:28 2434
Cedarville 10:11:20 -44.5 Dark Down 67.2 131.7 Up 09:56:20 - 10:26:20 2375
Fall River/Burney 10:11:29 -45.5 Dark Down 66.8 128.7 Up 09:56:29 - 10:26:29 2338
Susanville 10:11:26 -45.4 Dark Down 67.6 128.8 Up 09:56:26 - 10:26:26 2263
Greenville 10:11:27 -45.8 Dark Down 67.6 127.8 Up 09:56:27 - 10:26:27 2237
Gimple 10:11:28 -45.7 Dark Down 67.7 128.0 Up 09:56:28 - 10:26:28 2236
Quincy 10:11:29 -45.9 Dark Down 67.8 127.4 Up 09:56:29 - 10:26:29 2216
Portola 10:11:26 -45.6 Dark Down 68.1 128.0 Up 09:56:26 - 10:26:26 2197
Reno 10:11:22 -45.4 Dark Down 68.7 128.7 Up 09:56:22 - 10:26:22 2162
Carson City 10:11:23 -45.6 Dark Down 68.9 128.0 Up 09:56:23 - 10:26:23 2123
Niwot 10:09:51 -35.3 Dark Down 74.2 166.7 Up 09:54:51 - 10:24:51 2122
Gardnerville 10:11:23 -45.7 Dark Down 69.1 127.6 Up 09:56:23 - 10:26:23 2097
Yerington 10:11:19 -45.3 Dark Down 69.4 128.8 Up 09:56:19 - 10:26:19 2096
Hawthorne 10:11:16 -45.1 Dark Down 70.0 128.8 Up 09:56:16 - 10:26:16 2041
Lee Vining 10:11:20 -45.8 Dark Down 70.1 126.6 Up 09:56:20 - 10:26:20 1986
Tonopah 10:11:09 -44.4 Dark Down 71.1 130.6 Up 09:56:09 - 10:26:09 1976
Bishop 10:11:17 -45.6 Dark Down 70.9 126.7 Up 09:56:17 - 10:26:17 1914
Beatty 10:11:08 -44.7 Dark Down 72.2 128.9 Up 09:56:08 - 10:26:08 1848
Lone Pine 10:11:16 -45.7 Dark Down 71.5 125.5 Up 09:56:16 - 10:26:16 1829
Indian Springs 10:11:00 -44.1 Dark Down 73.0 130.4 Up 09:56:00 - 10:26:00 1803
Henderson 10:10:57 -43.8 Dark Down 73.8 130.7 Up 09:55:57 - 10:25:57 1739
CPSLO 10:11:34 -48.1 Dark Down 70.5 117.7 Up 09:56:34 - 10:26:34 1719
Patrick 10:10:33 -43.3 Dark Down 74.8 131.5 Up 09:55:33 - 10:25:33 1678
Searchlight/Boulder City 10:10:57 -44.0 Dark Down 74.2 129.3 Up 09:55:57 - 10:25:57 1676
Kingman/Dolan Springs 10:10:33 -43.5 Dark Down 74.8 130.4 Up 09:55:33 - 10:25:33 1659
Laughlin/Bullhead City 10:10:55 -43.9 Dark Down 74.6 129.3 Up 09:55:55 - 10:25:55 1641
DCO 10:10:33 -42.9 Dark Down 75.4 132.5 Up 09:55:33 - 10:25:33 1632
Mohave Valley 10:10:55 -44.0 Dark Down 74.8 128.5 Up 09:55:55 - 10:25:55 1611
Lake Havasu City 10:10:33 -44.0 Dark Down 75.1 127.7 Up 09:55:33 - 10:25:33 1592
Wildwood 10:11:22 -47.2 Dark Down 72.5 118.0 Up 09:56:22 - 10:26:22 1564
Parker 10:10:54 -44.1 Dark Down 75.4 126.9 Up 09:55:54 - 10:25:54 1527
Idyllwild 10:11:10 -46.0 Dark Down 74.0 120.4 Up 09:56:10 - 10:26:10 1505
Blythe 10:10:57 -44.5 Dark Down 75.5 124.6 Up 09:55:57 - 10:25:57 1472
Calipatria 10:11:04 -45.4 Dark Down 75.1 121.0 Up 09:56:04 - 10:26:04 1427
Yuma 10:10:58 -44.9 Dark Down 76.0 121.5 Up 09:55:58 - 10:25:58 1372

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, (2020/10/16 10:09UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 10.87 128
Alnath         05:26:17.5 +28:36:23  1.6  5.90 115
103 Tau        05:08:06.6 +24:15:54  5.3  0.56 119
PPM 094048     05:05:12.0 +23:47:56  8.3  0.95 120
PPM 094067     05:06:42.5 +24:37:03 10.0  0.08 120
PPM 094069     05:06:46.3 +24:42:20 11.1  0.05 120
98WV31         05:06:32.7 +24:41:38 17.0       120
Positions are for J2000

Event circumstances last updated at 2018/10/27 20:45:25 UT

Marc W. Buie, Southwest Research Institute

RECON