RECON: TNO occultation with 69986

Event between (69986) 98WW24 and star GA1040:01368056 with event index number of 171981

Geocentric closest approach at 2018/12/16 10:15:48 UTC

J2000 position of star is 05:58:37.2 +14:59:48
Equinox of date position of star is 05:59:41.5 +14:59:49
Stellar brightness G=16.9, use SENSEUP=128
Star is 84 degrees from the moon. Moon is 59% 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 25.0 km/sec on the sky relative to the star, or, 3.7 arcsec/hr.
The 1-sigma error in the time of the event is 160 seconds.
The 1-sigma cross-track error in the shadow position is 1523 km.
The sky-plane scale is 24508.8 km/arcsec.

The TNO has an absolute magnitude Hv=8.0
Diameter=151.4 km assuming a 5% albedo -- 6.0 sec chord
Diameter=61.8 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69986, (2018/12/16 10:16UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:11.9 +07:24:33  0.4  7.64  83
Alhena         06:38:48.4 +16:22:54  1.9  9.51  94
137 Tau        05:53:26.9 +14:10:30  5.5  1.72  83
PPM 121698     06:00:08.0 +15:18:54  8.2  0.33  84
PPM 121691     06:00:00.9 +15:00:36 10.0  0.08  84
69986          05:59:42.3 +14:59:49 16.9        84
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 23.3 km RECON observability=1.0 and success probability=0.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Rutland 10:14:20 -51.8 Dark Down 47.7 225.0 Up 10:00:30 - 10:28:10 7104
Penticton 10:14:20 -52.0 Dark Down 48.0 225.1 Up 10:00:30 - 10:28:10 7070
Okanagan Falls 10:14:19 -52.2 Dark Down 48.1 225.2 Up 10:00:29 - 10:28:09 7053
Southern Okanagan 10:14:19 -52.2 Dark Down 48.2 225.4 Up 10:00:29 - 10:28:09 7038
Oroville 10:14:18 -52.3 Dark Down 48.4 225.7 Up 10:00:28 - 10:28:08 7016
Tonasket 10:14:18 -52.4 Dark Down 48.5 225.9 Up 10:00:28 - 10:28:08 6995
Okanogan 10:14:18 -52.7 Dark Down 48.8 226.0 Up 10:00:28 - 10:28:08 6963
Brewster 10:14:18 -52.9 Dark Down 49.1 226.0 Up 10:00:28 - 10:28:08 6937
Manson/Chelan 10:14:19 -53.2 Dark Down 49.4 225.7 Up 10:00:29 - 10:28:09 6915
Entiat 10:14:19 -53.4 Dark Down 49.6 225.7 Up 10:00:29 - 10:28:09 6894
Wenatchee 10:14:19 -53.6 Dark Down 49.9 225.8 Up 10:00:29 - 10:28:09 6870
Ellensburg 10:14:19 -53.9 Dark Down 50.2 225.9 Up 10:00:29 - 10:28:09 6830
Yakima 10:14:18 -54.1 Dark Down 50.5 226.2 Up 10:00:28 - 10:28:08 6792
Toppenish/White Swan 10:14:18 -54.1 Dark Down 50.6 226.6 Up 10:00:28 - 10:28:08 6772
Pasco 10:14:14 -53.4 Dark Down 50.0 228.4 Up 10:00:24 - 10:28:04 6768
PNWRO 10:14:13 -53.3 Dark Down 50.1 228.9 Up 10:00:23 - 10:28:03 6746
George/Umatilla 10:14:14 -53.7 Dark Down 50.4 228.4 Up 10:00:24 - 10:28:04 6735
Goldendale 10:14:18 -54.6 Dark Down 51.2 226.6 Up 10:00:28 - 10:28:08 6718
The Dalles 10:14:19 -54.9 Dark Down 51.5 226.3 Up 10:00:29 - 10:28:09 6694
Maupin 10:14:18 -55.1 Dark Down 51.8 226.8 Up 10:00:28 - 10:28:08 6655
Madras/Culver 10:14:17 -55.4 Dark Down 52.2 227.3 Up 10:00:27 - 10:28:07 6602
Sisters 10:14:18 -55.8 Dark Down 52.6 227.0 Up 10:00:28 - 10:28:08 6567
Redmond 10:14:17 -55.5 Dark Down 52.4 227.5 Up 10:00:27 - 10:28:07 6567
Bend 10:14:17 -55.7 Dark Down 52.7 227.6 Up 10:00:27 - 10:28:07 6546
Oregon Observatory 10:14:17 -55.9 Dark Down 52.8 227.6 Up 10:00:27 - 10:28:07 6528
La Pine/Gilchrist 10:14:17 -56.0 Dark Down 53.0 227.7 Up 10:00:27 - 10:28:07 6508
North Lake 10:14:15 -55.8 Dark Down 53.0 228.9 Up 10:00:25 - 10:28:05 6469
Paisley 10:14:13 -55.8 Dark Down 53.1 229.9 Up 10:00:23 - 10:28:03 6417
Chiloquin 10:14:17 -56.7 Dark Down 54.0 228.3 Up 10:00:27 - 10:28:07 6398
Lakeview 10:14:12 -55.9 Dark Down 53.4 230.7 Up 10:00:22 - 10:28:02 6368
Klamath Falls 10:14:16 -56.8 Dark Down 54.1 228.8 Up 10:00:26 - 10:28:06 6364
Tulelake 10:14:15 -56.7 Dark Down 54.1 229.5 Up 10:00:25 - 10:28:05 6339
Cedarville 10:14:11 -56.0 Dark Down 53.7 231.6 Up 10:00:21 - 10:28:01 6305
Niwot 10:13:28 -45.5 Dark Down 44.6 249.2 Up 09:59:38 - 10:27:18 6295
Fall River/Burney 10:14:14 -57.0 Dark Down 54.7 230.5 Up 10:00:24 - 10:28:04 6250
Susanville 10:14:11 -56.7 Dark Down 54.6 232.2 Up 10:00:21 - 10:28:01 6191
Gimple 10:14:11 -57.0 Dark Down 54.9 232.2 Up 10:00:21 - 10:28:01 6162
Greenville 10:14:12 -57.1 Dark Down 55.0 232.1 Up 10:00:22 - 10:28:02 6162
Quincy 10:14:11 -57.1 Dark Down 55.1 232.4 Up 10:00:21 - 10:28:01 6141
Portola 10:14:10 -56.8 Dark Down 54.9 233.1 Up 10:00:20 - 10:28:00 6132
Reno 10:14:08 -56.4 Dark Down 54.7 234.2 Up 10:00:18 - 10:27:58 6109
Carson City 10:14:07 -56.5 Dark Down 54.9 234.7 Up 10:00:17 - 10:27:57 6073
Yerington 10:14:05 -56.1 Dark Down 54.6 235.7 Up 10:00:15 - 10:27:55 6057
Gardnerville 10:14:07 -56.6 Dark Down 55.0 235.0 Up 10:00:17 - 10:27:57 6049
Hawthorne 10:14:03 -55.9 Dark Down 54.5 236.9 Up 10:00:13 - 10:27:53 6014
Tonopah 10:13:58 -54.9 Dark Down 53.8 239.1 Up 10:00:08 - 10:27:48 5977
Lee Vining 10:14:04 -56.4 Dark Down 55.1 237.0 Up 10:00:14 - 10:27:54 5953
Bishop 10:14:01 -56.0 Dark Down 55.0 238.5 Up 10:00:11 - 10:27:51 5897
Beatty 10:13:55 -54.8 Dark Down 54.1 241.0 Up 10:00:05 - 10:27:45 5862
Indian Springs 10:13:52 -54.1 Dark Down 53.5 242.6 Up 10:00:02 - 10:27:42 5837
Lone Pine 10:13:59 -55.9 Dark Down 55.1 239.9 Up 10:00:09 - 10:27:49 5822
Henderson 10:13:49 -53.6 Dark Down 53.2 243.9 Up 09:59:59 - 10:27:39 5788
Patrick 10:13:45 -52.8 Dark Down 52.7 245.8 Up 09:59:55 - 10:27:35 5733
Searchlight/Boulder City 10:13:49 -53.7 Dark Down 53.4 244.7 Up 09:59:59 - 10:27:39 5730
Kingman/Dolan Springs 10:13:45 -53.0 Dark Down 52.9 245.9 Up 09:59:55 - 10:27:35 5709
DCO 10:13:42 -52.3 Dark Down 52.3 246.9 Up 09:59:52 - 10:27:32 5708
Laughlin/Bullhead City 10:13:46 -53.4 Dark Down 53.3 245.4 Up 09:59:56 - 10:27:36 5702
Mohave Valley 10:13:46 -53.5 Dark Down 53.4 245.8 Up 09:59:56 - 10:27:36 5674
CPSLO 10:14:06 -58.2 Dark Down 57.6 238.4 Up 10:00:16 - 10:27:56 5670
Lake Havasu City 10:13:45 -53.3 Dark Down 53.4 246.5 Up 09:59:55 - 10:27:35 5635
Parker 10:13:45 -53.3 Dark Down 53.5 247.0 Up 09:59:55 - 10:27:35 5598
Wildwood 10:13:58 -56.8 Dark Down 56.7 242.5 Up 10:00:08 - 10:27:48 5558
Blythe 10:13:45 -53.6 Dark Down 54.0 247.3 Up 09:59:55 - 10:27:35 5541
Idyllwild 10:13:52 -55.4 Dark Down 55.5 245.0 Up 10:00:02 - 10:27:42 5535
Calipatria 10:13:48 -54.5 Dark Down 54.9 247.0 Up 09:59:58 - 10:27:38 5481
Yuma 10:13:44 -53.8 Dark Down 54.3 248.5 Up 09:59:54 - 10:27:34 5444

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, (2018/12/16 10:16UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  7.64  83
Alhena         06:37:42.8 +16:23:57  1.9  9.51  94
137 Tau        05:52:22.2 +14:10:18  5.5  1.72  83
PPM 121698     05:59:02.8 +15:18:53  8.2  0.33  84
PPM 121691     05:58:55.8 +15:00:35 10.0  0.08  84
69986          05:58:37.2 +14:59:48 16.9        84
Positions are for J2000

Event circumstances last updated at 2018/09/19 17:46:42 UT

Marc W. Buie, Southwest Research Institute

RECON