RECON: TNO occultation with 69986

Event between (69986) 98WW24 and star UC4-526-020339 with event index number of 166730

Geocentric closest approach at 2018/12/04 10:53:30 UTC

J2000 position of star is 05:59:48.5 +15:01:09
Equinox of date position of star is 06:00:50.7 +15:01:08
Stellar brightness R=11.8, 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 198 seconds.
The 1-sigma cross-track error in the shadow position is 1520 km.
The sky-plane scale is 24532.5 km/arcsec.

The TNO has an absolute magnitude Hv=8.0
Diameter=158.5 km assuming a 5% albedo -- 6.4 sec chord
Diameter=64.7 km assuming a 30% albedo -- 2.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69986, (2018/12/04 10:54UT)
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  9.23 120
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  0.15 129
69986          06:00:53.5 +15:01:08 11.8       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 4.5 sigma about the mid-time.
The median site spacing is 24.2 km RECON observability=1.0 and success probability=28.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 10:51:57 -45.1 Dark Down 49.6 222.2 Up 10:36:57 - 11:06:57 315
Tonasket 10:51:57 -45.1 Dark Down 49.8 222.4 Up 10:36:57 - 11:06:57 293
Okanogan 10:51:57 -45.3 Dark Down 50.1 222.5 Up 10:36:57 - 11:06:57 261
Brewster 10:51:57 -45.5 Dark Down 50.4 222.4 Up 10:36:57 - 11:06:57 236
Manson/Chelan 10:51:58 -45.8 Dark Down 50.7 222.1 Up 10:36:58 - 11:06:58 215
Entiat 10:51:58 -46.0 Dark Down 50.9 222.2 Up 10:36:58 - 11:06:58 194
Wenatchee 10:51:58 -46.1 Dark Down 51.1 222.3 Up 10:36:58 - 11:06:58 170
Ellensburg 10:51:58 -46.4 Dark Down 51.5 222.3 Up 10:36:58 - 11:06:58 130
Yakima 10:51:57 -46.5 Dark Down 51.9 222.7 Up 10:36:57 - 11:06:57 92
Toppenish/White Swan 10:51:57 -46.5 Dark Down 51.9 223.1 Up 10:36:57 - 11:06:57 71
Pasco 10:51:53 -45.7 Dark Down 51.4 224.9 Up 10:36:53 - 11:06:53 62
PNWRO 10:51:52 -45.6 Dark Down 51.5 225.4 Up 10:36:52 - 11:06:52 39
George/Umatilla 10:51:53 -45.9 Dark Down 51.8 224.9 Up 10:36:53 - 11:06:53 29
Goldendale 10:51:57 -46.9 Dark Down 52.5 223.0 Up 10:36:57 - 11:06:57 18
The Dalles 10:51:58 -47.2 Dark Down 52.9 222.7 Up 10:36:58 - 11:06:58 -6
Maupin 10:51:58 -47.3 Dark Down 53.1 223.2 Up 10:36:58 - 11:06:58 -46
Madras/Culver 10:51:57 -47.5 Dark Down 53.6 223.6 Up 10:36:57 - 11:06:57 -99
Sisters 10:51:58 -47.9 Dark Down 54.0 223.3 Up 10:36:58 - 11:06:58 -132
Redmond 10:51:57 -47.6 Dark Down 53.8 223.9 Up 10:36:57 - 11:06:57 -134
Bend 10:51:57 -47.8 Dark Down 54.1 223.9 Up 10:36:57 - 11:06:57 -155
Oregon Observatory 10:51:57 -47.9 Dark Down 54.2 223.9 Up 10:36:57 - 11:06:57 -172
La Pine/Gilchrist 10:51:57 -48.0 Dark Down 54.4 224.0 Up 10:36:57 - 11:06:57 -192
North Lake 10:51:55 -47.7 Dark Down 54.4 225.3 Up 10:36:55 - 11:06:55 -234
Paisley 10:51:54 -47.6 Dark Down 54.6 226.3 Up 10:36:54 - 11:06:54 -288
Chiloquin 10:51:58 -48.6 Dark Down 55.4 224.6 Up 10:36:58 - 11:06:58 -303
Klamath Falls 10:51:57 -48.6 Dark Down 55.6 225.1 Up 10:36:57 - 11:06:57 -337
Lakeview 10:51:52 -47.6 Dark Down 54.9 227.1 Up 10:36:52 - 11:06:52 -338
Tulelake 10:51:56 -48.5 Dark Down 55.6 225.8 Up 10:36:56 - 11:06:56 -363
Cedarville 10:51:51 -47.6 Dark Down 55.2 228.0 Up 10:36:51 - 11:06:51 -404
Fall River/Burney 10:51:55 -48.6 Dark Down 56.2 226.9 Up 10:36:55 - 11:06:55 -454
Niwot 10:51:05 -36.7 Dark Down 46.5 246.7 Up 10:36:05 - 11:06:05 -471
Susanville 10:51:52 -48.2 Dark Down 56.2 228.6 Up 10:36:52 - 11:06:52 -516
Greenville 10:51:52 -48.5 Dark Down 56.6 228.5 Up 10:36:52 - 11:06:52 -545
Gimple 10:51:52 -48.4 Dark Down 56.5 228.6 Up 10:36:52 - 11:06:52 -545
Quincy 10:51:52 -48.5 Dark Down 56.7 228.7 Up 10:36:52 - 11:06:52 -565
Portola 10:51:51 -48.2 Dark Down 56.5 229.5 Up 10:36:51 - 11:06:51 -577
Reno 10:51:48 -47.8 Dark Down 56.3 230.7 Up 10:36:48 - 11:06:48 -603
Carson City 10:51:48 -47.8 Dark Down 56.5 231.2 Up 10:36:48 - 11:06:48 -639
Yerington 10:51:46 -47.4 Dark Down 56.3 232.3 Up 10:36:46 - 11:06:46 -658
Gardnerville 10:51:48 -47.8 Dark Down 56.7 231.5 Up 10:36:48 - 11:06:48 -664
Hawthorne 10:51:44 -47.0 Dark Down 56.2 233.5 Up 10:36:44 - 11:06:44 -704
Tonopah 10:51:39 -46.0 Dark Down 55.6 235.9 Up 10:36:39 - 11:06:39 -748
Lee Vining 10:51:45 -47.5 Dark Down 56.9 233.5 Up 10:36:45 - 11:06:45 -763
Bishop 10:51:42 -47.0 Dark Down 56.8 235.2 Up 10:36:42 - 11:06:42 -823
Beatty 10:51:36 -45.8 Dark Down 55.9 237.8 Up 10:36:36 - 11:06:36 -865
Indian Springs 10:51:32 -45.0 Dark Down 55.4 239.5 Up 10:36:32 - 11:06:32 -895
Lone Pine 10:51:40 -46.8 Dark Down 57.0 236.6 Up 10:36:40 - 11:06:40 -901
Henderson 10:51:30 -44.4 Dark Down 55.2 241.0 Up 10:36:30 - 11:06:30 -948
Searchlight/Boulder City 10:51:29 -44.4 Dark Down 55.4 241.8 Up 10:36:29 - 11:06:29 -1007
Patrick 10:51:25 -43.6 Dark Down 54.7 243.0 Up 10:36:25 - 11:06:25 -1008
Kingman/Dolan Springs 10:51:26 -43.7 Dark Down 54.9 243.1 Up 10:36:26 - 11:06:26 -1032
DCO 10:51:23 -43.0 Dark Down 54.3 244.2 Up 10:36:23 - 11:06:23 -1036
Laughlin/Bullhead City 10:51:27 -44.2 Dark Down 55.3 242.6 Up 10:36:27 - 11:06:27 -1037
CPSLO 10:51:48 -49.0 Dark Down 59.4 235.0 Up 10:36:48 - 11:06:48 -1042
Mohave Valley 10:51:27 -44.2 Dark Down 55.4 242.9 Up 10:36:27 - 11:06:27 -1065
Lake Havasu City 10:51:26 -44.0 Dark Down 55.4 243.7 Up 10:36:26 - 11:06:26 -1106
Parker 10:51:26 -44.0 Dark Down 55.6 244.2 Up 10:36:26 - 11:06:26 -1143
Wildwood 10:51:40 -47.5 Dark Down 58.7 239.3 Up 10:36:40 - 11:06:40 -1165
Idyllwild 10:51:33 -46.0 Dark Down 57.5 242.1 Up 10:36:33 - 11:06:33 -1196
Blythe 10:51:26 -44.2 Dark Down 56.0 244.6 Up 10:36:26 - 11:06:26 -1200
Calipatria 10:51:29 -45.0 Dark Down 56.9 244.2 Up 10:36:29 - 11:06:29 -1256
Yuma 10:51:25 -44.3 Dark Down 56.4 245.8 Up 10:36:25 - 11:06:25 -1298

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 10:54UT)
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  9.23 120
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  0.15 129
69986          05:59:48.5 +15:01:09 11.8       129
Positions are for J2000

Event circumstances last updated at 2018/02/13 17:09:29 UT

Marc W. Buie, Southwest Research Institute

RECON