RECON: TNO occultation with 98WX31

Event between 98WX31 and star GA1140:02440066 with event index number of 332906

Geocentric closest approach at 2019/12/10 09:29:53 UTC

J2000 position of star is 06:40:50.0 +25:46:48
Equinox of date position of star is 06:42:02.1 +25:45:38
Stellar brightness G=16.1, use SENSEUP=128
Star is 44 degrees from the moon. Moon is 96% illuminated.
TNO apparent brightness V=22.8

[RECON map]
TNO is 40.8 AU from the Sun and 39.9 AU from the Earth.
The TNO is moving 23.3 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 360 seconds.
The 1-sigma cross-track error in the shadow position is 1706 km.
The sky-plane scale is 28917.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.7
Diameter=272.9 km assuming a 5% albedo -- 11.7 sec chord
Diameter=111.4 km assuming a 30% albedo -- 4.8 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 98WX31, (2019/12/10 09:30UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:32.0 +27:58:35  1.1 14.54  58
Alhena         06:38:51.8 +16:22:50  1.9  9.41  43
PPM 096264     06:38:40.6 +24:34:21  6.5  1.41  43
PPM 096322     06:40:44.8 +24:34:53  6.9  1.22  43
PPM 096396     06:43:14.1 +25:47:56  9.6  0.27  44
PPM 096357     06:41:42.3 +25:41:47 10.4  0.10  43
98WX31         06:42:04.0 +25:45:36 16.1        44
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 2.5 sigma about the mid-time.
The median site spacing is 23.7 km RECON observability=1.0 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 09:29:58 -56.7 Dark Up 65.8 183.8 Up 09:14:58 - 09:44:58 11037
Summerland 09:29:59 -57.0 Dark Up 66.2 183.2 Up 09:14:59 - 09:44:59 11004
Penticton 09:29:59 -57.0 Dark Up 66.2 183.5 Up 09:14:59 - 09:44:59 10999
Okanagan Falls 09:29:59 -57.2 Dark Up 66.4 183.5 Up 09:14:59 - 09:44:59 10979
Oliver 09:29:58 -57.3 Dark Up 66.6 183.5 Up 09:14:58 - 09:44:58 10963
Anarchist Mountain Observatory 09:29:57 -57.3 Dark Up 66.7 184.0 Up 09:14:57 - 09:44:57 10947
Oroville 09:29:57 -57.4 Dark Up 66.8 183.8 Up 09:14:57 - 09:44:57 10939
Tonasket 09:29:58 -57.5 Dark Up 67.0 183.9 Up 09:14:58 - 09:44:58 10915
Okanogan 09:29:59 -57.8 Dark Up 67.4 183.6 Up 09:14:59 - 09:44:59 10880
Brewster 09:29:58 -58.1 Dark Up 67.7 183.1 Up 09:14:58 - 09:44:58 10850
Manson/Chelan 09:29:59 -58.4 Dark Up 67.9 182.3 Up 09:14:59 - 09:44:59 10826
Entiat 09:30:00 -58.6 Dark Up 68.1 182.2 Up 09:15:00 - 09:45:00 10803
Wenatchee 09:30:00 -58.8 Dark Up 68.4 181.9 Up 09:15:00 - 09:45:00 10776
Ellensburg 09:30:00 -59.2 Dark Up 68.8 181.4 Up 09:15:00 - 09:45:00 10732
Yakima 09:30:00 -59.5 Dark Up 69.2 181.4 Up 09:15:00 - 09:45:00 10690
Toppenish/White Swan 09:30:00 -59.6 Dark Up 69.4 181.9 Up 09:15:00 - 09:45:00 10669
Pasco 09:29:56 -59.0 Dark Up 69.5 185.1 Up 09:14:56 - 09:44:56 10667
PNWRO 09:29:55 -59.1 Dark Up 69.7 185.7 Up 09:14:55 - 09:44:55 10643
George/Umatilla 09:29:56 -59.4 Dark Up 69.8 184.6 Up 09:14:56 - 09:44:56 10630
Goldendale 09:30:01 -60.2 Dark Up 70.0 180.8 Up 09:15:01 - 09:45:01 10608
The Dalles 09:30:01 -60.5 Dark Up 70.2 179.8 Up 09:15:01 - 09:45:01 10582
Maupin 09:30:01 -60.7 Dark Up 70.6 180.1 Up 09:15:01 - 09:45:01 10539
Madras/Culver 09:30:02 -61.1 Dark Up 71.1 180.0 Up 09:15:02 - 09:45:02 10482
Redmond 09:30:01 -61.4 Dark Up 71.5 179.9 Up 09:15:01 - 09:45:01 10444
Sisters 09:30:02 -61.6 Dark Up 71.5 178.7 Up 09:15:02 - 09:45:02 10443
Bend 09:30:01 -61.6 Dark Up 71.7 179.5 Up 09:15:01 - 09:45:01 10420
Oregon Observatory 09:30:02 -61.8 Dark Up 71.9 179.1 Up 09:15:02 - 09:45:02 10401
La Pine/Gilchrist 09:30:02 -62.0 Dark Up 72.1 178.9 Up 09:15:02 - 09:45:02 10379
North Lake 09:30:00 -61.9 Dark Up 72.5 180.7 Up 09:15:00 - 09:45:00 10338
Paisley 09:29:59 -62.0 Dark Up 73.1 181.8 Up 09:14:59 - 09:44:59 10282
Chiloquin 09:30:03 -62.9 Dark Up 73.2 177.7 Up 09:15:03 - 09:45:03 10259
Lakeview 09:29:57 -62.2 Dark Up 73.6 182.4 Up 09:14:57 - 09:44:57 10230
Klamath Falls 09:30:02 -63.0 Dark Up 73.5 177.9 Up 09:15:02 - 09:45:02 10223
Niwot 09:29:02 -53.0 Dark Up 70.6 227.2 Up 09:14:02 - 09:44:02 10210
SwRI 09:29:02 -53.1 Dark Up 70.7 227.2 Up 09:14:02 - 09:44:02 10197
Tulelake 09:30:01 -63.0 Dark Up 73.8 178.9 Up 09:15:01 - 09:45:01 10197
Cedarville 09:29:57 -62.5 Dark Up 74.2 183.1 Up 09:14:57 - 09:44:57 10162
Fall River/Burney 09:30:01 -63.5 Dark Up 74.7 179.1 Up 09:15:01 - 09:45:01 10101
Susanville 09:29:58 -63.4 Dark Up 75.4 181.6 Up 09:14:58 - 09:44:58 10039
Gimple 09:29:58 -63.7 Dark Up 75.6 180.9 Up 09:14:58 - 09:44:58 10008
Greenville 09:29:59 -63.8 Dark Up 75.6 180.6 Up 09:14:59 - 09:44:59 10007
Quincy 09:30:00 -63.9 Dark Up 75.8 180.6 Up 09:15:00 - 09:45:00 9986
Portola 09:29:56 -63.7 Dark Up 76.0 182.4 Up 09:14:56 - 09:44:56 9976
Reno 09:29:54 -63.4 Dark Up 76.2 184.8 Up 09:14:54 - 09:44:54 9953
Carson City 09:29:55 -63.6 Dark Up 76.5 185.0 Up 09:14:55 - 09:44:55 9915
Yerington 09:29:52 -63.2 Dark Up 76.7 187.6 Up 09:14:52 - 09:44:52 9900
Gardnerville 09:29:54 -63.6 Dark Up 76.8 185.3 Up 09:14:54 - 09:44:54 9889
Hawthorne 09:29:49 -63.1 Dark Up 77.1 189.9 Up 09:14:49 - 09:44:49 9855
Tonopah 09:29:44 -62.3 Dark Up 77.3 195.9 Up 09:14:44 - 09:44:44 9820
Lee Vining 09:29:51 -63.7 Dark Up 77.7 188.3 Up 09:14:51 - 09:44:51 9790
Bishop 09:29:48 -63.5 Dark Up 78.2 191.9 Up 09:14:48 - 09:44:48 9732
Beatty 09:29:41 -62.5 Dark Up 78.3 199.4 Up 09:14:41 - 09:44:41 9700
Indian Springs 09:29:37 -61.8 Dark Up 78.3 204.4 Up 09:14:37 - 09:44:37 9678
Lone Pine 09:29:46 -63.6 Dark Up 78.9 194.1 Up 09:14:46 - 09:44:46 9654
Henderson 09:29:33 -61.5 Dark Up 78.5 208.4 Up 09:14:33 - 09:44:33 9629
Patrick 09:29:30 -60.8 Dark Up 78.6 214.4 Up 09:14:30 - 09:44:30 9575
Searchlight/Boulder City 09:29:34 -61.6 Dark Up 79.0 210.0 Up 09:14:34 - 09:44:34 9567
DCO 09:29:27 -60.4 Dark Up 78.5 218.0 Up 09:14:27 - 09:44:27 9552
Kingman/Dolan Springs 09:29:31 -61.0 Dark Up 78.9 214.3 Up 09:14:31 - 09:44:31 9549
Laughlin/Bullhead City 09:29:32 -61.5 Dark Up 79.1 212.2 Up 09:14:32 - 09:44:32 9540
Mohave Valley 09:29:31 -61.5 Dark Up 79.3 213.0 Up 09:14:31 - 09:44:31 9510
CPSLO 09:29:56 -66.0 Dark Up 80.5 182.4 Up 09:14:56 - 09:44:56 9488
Lake Havasu City 09:29:30 -61.5 Dark Up 79.6 215.3 Up 09:14:30 - 09:44:30 9470
Parker 09:29:31 -61.5 Dark Up 79.8 216.5 Up 09:14:31 - 09:44:31 9432
Wildwood 09:29:47 -64.9 Dark Up 81.4 195.0 Up 09:14:47 - 09:44:47 9376
Blythe 09:29:31 -61.9 Dark Up 80.4 217.0 Up 09:14:31 - 09:44:31 9371
Idyllwild 09:29:39 -63.5 Dark Up 81.2 206.4 Up 09:14:39 - 09:44:39 9358
Calipatria 09:29:34 -62.8 Dark Up 81.2 214.4 Up 09:14:34 - 09:44:34 9306
Yuma 09:29:30 -62.2 Dark Up 81.1 220.4 Up 09:14:30 - 09:44:30 9270

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 98WX31, (2019/12/10 09:30UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:18.0 +28:01:33  1.1 14.54  58
Alhena         06:37:42.8 +16:23:57  1.9  9.41  43
PPM 096264     06:37:27.2 +24:35:27  6.5  1.41  43
PPM 096322     06:39:31.5 +24:36:02  6.9  1.22  43
PPM 096396     06:42:00.1 +25:49:10  9.6  0.27  44
PPM 096357     06:40:28.4 +25:42:58 10.4  0.10  43
98WX31         06:40:50.0 +25:46:48 16.1        44
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:58:47 UT

Marc W. Buie, Southwest Research Institute

RECON