RECON: TNO occultation with 98WV31

Event between 98WV31 and star GA1140:01175089 with event index number of 1327106

Geocentric closest approach at 2023/10/30 08:01:19 UTC

J2000 position of star is 05:24:15.7 +25:24:48
Equinox of date position of star is 05:25:27.7 +25:25:48
Stellar brightness G=13.6, use SENSEUP=64
Star is 26 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=24.2

[RECON map]
TNO is 39.8 AU from the Sun and 39.1 AU from the Earth.
The TNO is moving 16.9 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 1118 seconds.
The 1-sigma cross-track error in the shadow position is 5558 km.
The sky-plane scale is 28369.7 km/arcsec.

The TNO has an absolute magnitude Hv=8.1
Diameter=144.5 km assuming a 5% albedo -- 8.6 sec chord
Diameter=59.0 km assuming a 30% albedo -- 3.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 98WV31, (2023/10/30 08:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:17.4 +16:33:20  0.8 14.36  16
Alnath         05:27:48.0 +28:37:32  1.6  3.22  27
PPM 094294     05:22:29.3 +27:58:45  6.3  2.65  25
PPM 094241     05:18:59.0 +24:02:00  7.9  2.08  24
PPM 094355     05:27:30.0 +25:46:44  8.8  0.53  26
PPM 094317     05:24:16.4 +25:07:24 10.2  0.45  26
98WV31         05:25:44.0 +25:26:01 13.6        26
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 0.8 sigma about the mid-time.
The median site spacing is 21.6 km RECON observability=1.0 and success probability=7.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 08:04:01 -53.5 Dark Up 50.1 112.4 Up 07:49:01 - 08:19:01 -3830
Summerland 08:04:03 -53.9 Dark Up 50.0 111.8 Up 07:49:03 - 08:19:03 -3852
Penticton 08:04:03 -53.9 Dark Up 50.1 111.8 Up 07:49:03 - 08:19:03 -3861
Okanagan Falls 08:04:04 -54.1 Dark Up 50.2 111.6 Up 07:49:04 - 08:19:04 -3878
Oliver 08:04:04 -54.3 Dark Up 50.3 111.4 Up 07:49:04 - 08:19:04 -3894
Anarchist Mountain Observatory 08:04:04 -54.4 Dark Up 50.4 111.4 Up 07:49:04 - 08:19:04 -3914
Oroville 08:04:05 -54.5 Dark Up 50.4 111.3 Up 07:49:05 - 08:19:05 -3919
Tonasket 08:04:05 -54.7 Dark Up 50.5 111.0 Up 07:49:05 - 08:19:05 -3941
Okanogan 08:04:06 -55.1 Dark Up 50.5 110.5 Up 07:49:06 - 08:19:06 -3970
Brewster 08:04:08 -55.4 Dark Up 50.5 110.0 Up 07:49:08 - 08:19:08 -3991
Manson/Chelan 08:04:10 -55.6 Dark Up 50.4 109.4 Up 07:49:10 - 08:19:10 -4004
Entiat 08:04:11 -55.8 Dark Up 50.4 109.1 Up 07:49:11 - 08:19:11 -4023
Wenatchee 08:04:12 -56.1 Dark Up 50.4 108.7 Up 07:49:12 - 08:19:12 -4045
Ellensburg 08:04:15 -56.5 Dark Up 50.4 108.0 Up 07:49:15 - 08:19:15 -4080
Yakima 08:04:16 -56.9 Dark Up 50.5 107.5 Up 07:49:16 - 08:19:16 -4118
Toppenish/White Swan 08:04:16 -57.1 Dark Up 50.7 107.4 Up 07:49:16 - 08:19:16 -4143
Pasco 08:04:12 -57.1 Dark Up 51.6 108.5 Up 07:49:12 - 08:19:12 -4181
Goldendale 08:04:19 -57.7 Dark Up 50.6 106.4 Up 07:49:19 - 08:19:19 -4187
The Dalles 08:04:20 -58.0 Dark Up 50.4 105.8 Up 07:49:20 - 08:19:20 -4200
George/Umatilla 08:04:14 -57.4 Dark Up 51.5 107.9 Up 07:49:14 - 08:19:14 -4209
PNWRO 08:04:12 -57.3 Dark Up 51.8 108.5 Up 07:49:12 - 08:19:12 -4210
Maupin 08:04:21 -58.4 Dark Up 50.6 105.4 Up 07:49:21 - 08:19:21 -4243
Madras/Culver 08:04:23 -58.9 Dark Up 50.7 104.7 Up 07:49:23 - 08:19:23 -4295
Sisters 08:04:26 -59.3 Dark Up 50.5 103.9 Up 07:49:26 - 08:19:26 -4317
Redmond 08:04:25 -59.3 Dark Up 50.8 104.3 Up 07:49:25 - 08:19:25 -4328
Bend 08:04:26 -59.5 Dark Up 50.7 103.9 Up 07:49:26 - 08:19:26 -4346
Oregon Observatory 08:04:27 -59.7 Dark Up 50.7 103.6 Up 07:49:27 - 08:19:27 -4360
La Pine/Gilchrist 08:04:28 -59.9 Dark Up 50.7 103.3 Up 07:49:28 - 08:19:28 -4379
North Lake 08:04:27 -60.3 Dark Up 51.2 103.3 Up 07:49:27 - 08:19:27 -4435
Chiloquin 08:04:32 -61.0 Dark Up 50.7 101.6 Up 07:49:32 - 08:19:32 -4479
Paisley 08:04:27 -60.8 Dark Up 51.6 102.9 Up 07:49:27 - 08:19:27 -4497
Klamath Falls 08:04:33 -61.4 Dark Up 50.8 101.3 Up 07:49:33 - 08:19:33 -4515
Tulelake 08:04:32 -61.6 Dark Up 51.1 101.2 Up 07:49:32 - 08:19:32 -4549
Lakeview 08:04:28 -61.2 Dark Up 51.8 102.5 Up 07:49:28 - 08:19:28 -4552
Cedarville 08:04:29 -61.9 Dark Up 52.1 101.8 Up 07:49:29 - 08:19:29 -4621
Fall River/Burney 08:04:35 -62.5 Dark Up 51.3 100.2 Up 07:49:35 - 08:19:35 -4640
Susanville 08:04:34 -63.0 Dark Up 52.0 100.0 Up 07:49:34 - 08:19:34 -4721
Greenville 08:04:35 -63.3 Dark Up 51.8 99.4 Up 07:49:35 - 08:19:35 -4742
Gimple 08:04:36 -63.3 Dark Up 51.9 99.5 Up 07:49:36 - 08:19:36 -4744
Quincy 08:04:36 -63.5 Dark Up 51.8 99.2 Up 07:49:36 - 08:19:36 -4762
Portola 08:04:34 -63.6 Dark Up 52.2 99.4 Up 07:49:34 - 08:19:34 -4786
Reno 08:04:33 -63.8 Dark Up 52.8 99.6 Up 07:49:33 - 08:19:33 -4828
Carson City 08:04:34 -64.1 Dark Up 52.8 99.1 Up 07:49:34 - 08:19:34 -4865
Gardnerville 08:04:34 -64.3 Dark Up 52.9 98.9 Up 07:49:34 - 08:19:34 -4890
Yerington 08:04:32 -64.2 Dark Up 53.3 99.4 Up 07:49:32 - 08:19:32 -4899
Hawthorne 08:04:31 -64.5 Dark Up 53.8 99.2 Up 07:49:31 - 08:19:31 -4959
Lee Vining 08:04:34 -65.2 Dark Up 53.5 98.0 Up 07:49:34 - 08:19:34 -5005
Tonopah 08:04:27 -64.7 Dark Up 55.0 99.6 Up 07:49:27 - 08:19:27 -5039
Niwot 08:03:32 -58.4 Dark Up 63.2 114.9 Up 07:48:32 - 08:18:32 -5055
SwRI 08:03:32 -58.6 Dark Up 63.1 114.6 Up 07:48:32 - 08:18:32 -5065
Bishop 08:04:33 -65.6 Dark Up 54.2 97.8 Up 07:49:33 - 08:19:33 -5083
Beatty 08:04:28 -65.6 Dark Up 55.5 98.4 Up 07:49:28 - 08:19:28 -5168
Lone Pine 08:04:33 -66.2 Dark Up 54.5 97.0 Up 07:49:33 - 08:19:33 -5169
Indian Springs 08:04:24 -65.6 Dark Up 56.4 98.7 Up 07:49:24 - 08:19:24 -5226
CPSLO 08:04:46 -68.0 Dark Up 52.6 93.5 Up 07:49:46 - 08:19:46 -5240
Henderson 08:04:22 -65.9 Dark Up 57.0 98.4 Up 07:49:22 - 08:19:22 -5297
Searchlight/Boulder City 08:04:23 -66.4 Dark Up 57.2 97.6 Up 07:49:23 - 08:19:23 -5358
Patrick 08:04:18 -66.1 Dark Up 58.0 98.3 Up 07:49:18 - 08:19:18 -5387
Laughlin/Bullhead City 08:04:22 -66.5 Dark Up 57.5 97.4 Up 07:49:22 - 08:19:22 -5397
Kingman/Dolan Springs 08:04:20 -66.3 Dark Up 57.9 97.8 Up 07:49:20 - 08:19:20 -5406
Wildwood 08:04:41 -68.8 Dark Up 54.4 93.1 Up 07:49:41 - 08:19:41 -5416
Mohave Valley 08:04:23 -66.8 Dark Up 57.5 97.0 Up 07:49:23 - 08:19:23 -5426
DCO 08:04:16 -66.0 Dark Up 58.6 98.4 Up 07:49:16 - 08:19:16 -5434
Lake Havasu City 08:04:23 -67.0 Dark Up 57.8 96.5 Up 07:49:23 - 08:19:23 -5473
Idyllwild 08:04:34 -68.6 Dark Up 55.9 93.8 Up 07:49:34 - 08:19:34 -5499
Parker 08:04:23 -67.3 Dark Up 57.8 96.0 Up 07:49:23 - 08:19:23 -5511
Blythe 08:04:25 -67.9 Dark Up 57.7 95.0 Up 07:49:25 - 08:19:25 -5559
Calipatria 08:04:30 -68.7 Dark Up 56.9 93.6 Up 07:49:30 - 08:19:30 -5590
Yuma 08:04:27 -68.7 Dark Up 57.7 93.5 Up 07:49:27 - 08:19:27 -5656

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, (2023/10/30 08:01UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:30  0.8 14.36  16
Alnath         05:26:17.5 +28:36:23  1.6  3.22  27
PPM 094294     05:20:59.3 +27:57:25  6.3  2.65  25
PPM 094241     05:17:31.7 +24:00:34  7.9  2.08  24
PPM 094355     05:26:01.5 +25:45:35  8.8  0.53  26
PPM 094317     05:22:48.4 +25:06:08 10.2  0.45  26
98WV31         05:24:15.7 +25:24:48 13.6        26
Positions are for J2000

Event circumstances last updated at 2019/06/08 06:06:41 UT

Marc W. Buie, Southwest Research Institute

RECON