RECON: TNO occultation with 69986

Event between (69986) 98WW24 and star GA1040:01393571 with event index number of 166730

Geocentric closest approach at 2018/12/04 10:51:33 UTC

J2000 position of star is 05:59:48.5 +15:01:09
Equinox of date position of star is 06:00:52.7 +15:01:08
Stellar brightness G=11.7, use SENSEUP=8
Star is 129 degrees from the moon. Moon is 9% illuminated.
TNO apparent brightness V=23.4

[RECON map]
TNO is 34.8 AU from the Sun and 33.8 AU from the Earth.
The TNO is moving 23.8 km/sec on the sky relative to the star, or, 3.5 arcsec/hr.
The 1-sigma error in the time of the event is 170 seconds.
The 1-sigma cross-track error in the shadow position is 1458 km.
The sky-plane scale is 24533.0 km/arcsec.

The TNO has an absolute magnitude Hv=8.0
Diameter=151.4 km assuming a 5% albedo -- 6.4 sec chord
Diameter=61.8 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69986, (2018/12/04 10:52UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:11.8 +07:24:33  0.4  7.70 129
Alhena         06:38:48.3 +16:22:54  1.9  9.23 119
137 Tau        05:53:26.8 +14:10:30  5.5  1.99 130
PPM 121745     06:01:46.1 +14:57:23  7.9  0.22 128
PPM 121730     06:01:20.0 +15:07:50  8.8  0.15 128
69986          06:00:53.5 +15:01:08 11.7       128
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 5.0 sigma about the mid-time.
The median site spacing is 24.1 km RECON observability=1.0 and success probability=28.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Rutland 10:50:01 -45.0 Dark Down 49.1 220.9 Up 10:35:24 - 11:04:39 1909
Penticton 10:50:01 -45.2 Dark Down 49.4 221.0 Up 10:35:24 - 11:04:39 1875
Okanagan Falls 10:50:01 -45.3 Dark Down 49.6 221.1 Up 10:35:24 - 11:04:39 1857
Southern Okanagan 10:50:01 -45.3 Dark Down 49.7 221.2 Up 10:35:23 - 11:04:38 1842
Oroville 10:50:00 -45.4 Dark Down 49.8 221.6 Up 10:35:23 - 11:04:38 1819
Tonasket 10:50:00 -45.4 Dark Down 50.0 221.8 Up 10:35:22 - 11:04:37 1797
Okanogan 10:50:00 -45.6 Dark Down 50.3 221.8 Up 10:35:23 - 11:04:38 1766
Brewster 10:50:00 -45.9 Dark Down 50.6 221.8 Up 10:35:23 - 11:04:38 1740
Manson/Chelan 10:50:01 -46.2 Dark Down 50.9 221.5 Up 10:35:24 - 11:04:39 1720
Entiat 10:50:01 -46.3 Dark Down 51.1 221.6 Up 10:35:24 - 11:04:39 1699
Wenatchee 10:50:01 -46.4 Dark Down 51.4 221.6 Up 10:35:24 - 11:04:39 1674
Ellensburg 10:50:01 -46.7 Dark Down 51.8 221.7 Up 10:35:24 - 11:04:39 1635
Yakima 10:50:01 -46.8 Dark Down 52.1 222.0 Up 10:35:24 - 11:04:39 1596
Toppenish/White Swan 10:50:00 -46.8 Dark Down 52.2 222.4 Up 10:35:23 - 11:04:38 1575
Pasco 10:49:56 -46.0 Dark Down 51.7 224.2 Up 10:35:19 - 11:04:34 1566
PNWRO 10:49:56 -45.9 Dark Down 51.7 224.8 Up 10:35:18 - 11:04:33 1543
George/Umatilla 10:49:57 -46.3 Dark Down 52.0 224.2 Up 10:35:19 - 11:04:34 1534
Goldendale 10:50:01 -47.3 Dark Down 52.8 222.3 Up 10:35:23 - 11:04:38 1522
The Dalles 10:50:02 -47.6 Dark Down 53.1 222.0 Up 10:35:24 - 11:04:39 1499
Maupin 10:50:01 -47.6 Dark Down 53.4 222.5 Up 10:35:24 - 11:04:39 1459
Madras/Culver 10:50:01 -47.8 Dark Down 53.8 223.0 Up 10:35:23 - 11:04:38 1406
Sisters 10:50:02 -48.2 Dark Down 54.3 222.6 Up 10:35:24 - 11:04:39 1373
Redmond 10:50:00 -48.0 Dark Down 54.1 223.2 Up 10:35:23 - 11:04:38 1371
Bend 10:50:01 -48.1 Dark Down 54.3 223.2 Up 10:35:23 - 11:04:38 1350
Oregon Observatory 10:50:01 -48.3 Dark Down 54.5 223.2 Up 10:35:24 - 11:04:39 1332
La Pine/Gilchrist 10:50:01 -48.4 Dark Down 54.7 223.3 Up 10:35:23 - 11:04:38 1312
North Lake 10:49:59 -48.1 Dark Down 54.7 224.6 Up 10:35:21 - 11:04:36 1270
Paisley 10:49:57 -48.0 Dark Down 54.9 225.6 Up 10:35:19 - 11:04:34 1216
Chiloquin 10:50:01 -48.9 Dark Down 55.7 223.9 Up 10:35:24 - 11:04:39 1202
Klamath Falls 10:50:00 -49.0 Dark Down 55.9 224.4 Up 10:35:23 - 11:04:38 1168
Lakeview 10:49:56 -48.0 Dark Down 55.1 226.4 Up 10:35:18 - 11:04:33 1166
Tulelake 10:50:00 -48.8 Dark Down 55.9 225.1 Up 10:35:22 - 11:04:37 1141
Cedarville 10:49:55 -48.0 Dark Down 55.5 227.4 Up 10:35:18 - 11:04:33 1101
Fall River/Burney 10:49:59 -49.0 Dark Down 56.5 226.2 Up 10:35:21 - 11:04:36 1050
Niwot 10:49:09 -37.0 Dark Down 46.9 246.2 Up 10:34:31 - 11:03:46 1030
Susanville 10:49:56 -48.6 Dark Down 56.5 227.9 Up 10:35:18 - 11:04:33 988
Greenville 10:49:56 -48.9 Dark Down 56.9 227.8 Up 10:35:18 - 11:04:33 960
Gimple 10:49:56 -48.8 Dark Down 56.8 227.9 Up 10:35:18 - 11:04:33 959
Quincy 10:49:56 -48.9 Dark Down 57.0 228.0 Up 10:35:18 - 11:04:33 939
Portola 10:49:54 -48.6 Dark Down 56.8 228.9 Up 10:35:17 - 11:04:32 927
Reno 10:49:52 -48.1 Dark Down 56.6 230.1 Up 10:35:15 - 11:04:30 901
Carson City 10:49:52 -48.2 Dark Down 56.8 230.5 Up 10:35:14 - 11:04:29 865
Yerington 10:49:49 -47.7 Dark Down 56.6 231.6 Up 10:35:12 - 11:04:27 846
Gardnerville 10:49:51 -48.2 Dark Down 57.0 230.9 Up 10:35:14 - 11:04:29 840
Hawthorne 10:49:47 -47.4 Dark Down 56.5 232.9 Up 10:35:10 - 11:04:25 800
Tonopah 10:49:42 -46.4 Dark Down 55.9 235.3 Up 10:35:05 - 11:04:20 756
Lee Vining 10:49:49 -47.9 Dark Down 57.2 232.9 Up 10:35:11 - 11:04:26 741
Bishop 10:49:45 -47.4 Dark Down 57.1 234.6 Up 10:35:08 - 11:04:23 681
Beatty 10:49:40 -46.2 Dark Down 56.3 237.2 Up 10:35:02 - 11:04:17 638
Indian Springs 10:49:36 -45.4 Dark Down 55.7 239.0 Up 10:34:58 - 11:04:13 608
Lone Pine 10:49:44 -47.2 Dark Down 57.3 236.0 Up 10:35:06 - 11:04:21 603
Henderson 10:49:33 -44.8 Dark Down 55.5 240.4 Up 10:34:56 - 11:04:11 555
Searchlight/Boulder City 10:49:32 -44.8 Dark Down 55.8 241.2 Up 10:34:55 - 11:04:10 496
Patrick 10:49:29 -44.0 Dark Down 55.0 242.5 Up 10:34:51 - 11:04:06 495
Kingman/Dolan Springs 10:49:29 -44.1 Dark Down 55.3 242.6 Up 10:34:52 - 11:04:07 471
DCO 10:49:26 -43.4 Dark Down 54.7 243.7 Up 10:34:49 - 11:04:04 466
Laughlin/Bullhead City 10:49:31 -44.6 Dark Down 55.6 242.0 Up 10:34:53 - 11:04:08 466
CPSLO 10:49:52 -49.4 Dark Down 59.7 234.3 Up 10:35:14 - 11:04:29 462
Mohave Valley 10:49:31 -44.6 Dark Down 55.8 242.4 Up 10:34:53 - 11:04:08 438
Lake Havasu City 10:49:30 -44.4 Dark Down 55.8 243.2 Up 10:34:52 - 11:04:07 397
Parker 10:49:29 -44.4 Dark Down 55.9 243.7 Up 10:34:52 - 11:04:07 360
Wildwood 10:49:44 -47.9 Dark Down 59.0 238.7 Up 10:35:06 - 11:04:21 339
Idyllwild 10:49:37 -46.4 Dark Down 57.9 241.5 Up 10:35:00 - 11:04:15 307
Blythe 10:49:30 -44.6 Dark Down 56.4 244.0 Up 10:34:52 - 11:04:07 303
Calipatria 10:49:32 -45.4 Dark Down 57.3 243.7 Up 10:34:55 - 11:04:10 247
Yuma 10:49:29 -44.7 Dark Down 56.8 245.3 Up 10:34:52 - 11:04:07 205

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 69986, (2018/12/04 10:52UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  7.70 129
Alhena         06:37:42.8 +16:23:57  1.9  9.23 119
137 Tau        05:52:22.2 +14:10:18  5.5  1.99 130
PPM 121745     06:00:41.2 +14:57:25  7.9  0.22 128
PPM 121730     06:00:15.0 +15:07:52  8.8  0.15 128
69986          05:59:48.5 +15:01:09 11.7       129
Positions are for J2000

Event circumstances last updated at 2018/09/19 17:46:16 UT

Marc W. Buie, Southwest Research Institute

RECON