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 10:54:40 UTC

J2000 position of star is 05:59:48.5 +15:01:09
Equinox of date position of star is 06:00:51.7 +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 184 seconds.
The 1-sigma cross-track error in the shadow position is 1493 km.
The sky-plane scale is 24532.5 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 10:55UT)
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 11.7       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 4.9 sigma about the mid-time.
The median site spacing is 24.3 km RECON observability=1.0 and success probability=28.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Penticton 10:53:07 -44.7 Dark Down 49.1 222.0 Up 10:38:07 - 11:08:07 1587
Oroville 10:53:06 -44.9 Dark Down 49.5 222.6 Up 10:38:06 - 11:08:06 1531
Tonasket 10:53:06 -44.9 Dark Down 49.7 222.8 Up 10:38:06 - 11:08:06 1510
Okanogan 10:53:06 -45.2 Dark Down 50.0 222.9 Up 10:38:06 - 11:08:06 1478
Brewster 10:53:06 -45.4 Dark Down 50.3 222.8 Up 10:38:06 - 11:08:06 1452
Manson/Chelan 10:53:07 -45.7 Dark Down 50.6 222.5 Up 10:38:07 - 11:08:07 1431
Entiat 10:53:07 -45.8 Dark Down 50.8 222.6 Up 10:38:07 - 11:08:07 1410
Wenatchee 10:53:07 -45.9 Dark Down 51.0 222.7 Up 10:38:07 - 11:08:07 1386
Ellensburg 10:53:07 -46.2 Dark Down 51.4 222.7 Up 10:38:07 - 11:08:07 1346
Yakima 10:53:07 -46.3 Dark Down 51.7 223.1 Up 10:38:07 - 11:08:07 1308
Toppenish/White Swan 10:53:06 -46.3 Dark Down 51.8 223.5 Up 10:38:06 - 11:08:06 1287
Pasco 10:53:02 -45.5 Dark Down 51.3 225.3 Up 10:38:02 - 11:08:02 1278
PNWRO 10:53:01 -45.4 Dark Down 51.3 225.8 Up 10:38:01 - 11:08:01 1255
George/Umatilla 10:53:02 -45.7 Dark Down 51.6 225.3 Up 10:38:02 - 11:08:02 1246
Goldendale 10:53:07 -46.7 Dark Down 52.4 223.4 Up 10:38:07 - 11:08:07 1233
The Dalles 10:53:08 -47.1 Dark Down 52.7 223.1 Up 10:38:08 - 11:08:08 1211
Maupin 10:53:07 -47.1 Dark Down 53.0 223.6 Up 10:38:07 - 11:08:07 1171
Madras/Culver 10:53:06 -47.3 Dark Down 53.4 224.0 Up 10:38:06 - 11:08:06 1117
Sisters 10:53:07 -47.7 Dark Down 53.9 223.7 Up 10:38:07 - 11:08:07 1084
Redmond 10:53:06 -47.4 Dark Down 53.7 224.3 Up 10:38:06 - 11:08:06 1082
Bend 10:53:06 -47.6 Dark Down 53.9 224.3 Up 10:38:06 - 11:08:06 1061
Oregon Observatory 10:53:06 -47.7 Dark Down 54.1 224.3 Up 10:38:06 - 11:08:06 1044
La Pine/Gilchrist 10:53:07 -47.8 Dark Down 54.3 224.4 Up 10:38:07 - 11:08:07 1024
North Lake 10:53:04 -47.5 Dark Down 54.3 225.7 Up 10:38:04 - 11:08:04 982
Paisley 10:53:03 -47.4 Dark Down 54.5 226.7 Up 10:38:03 - 11:08:03 928
Chiloquin 10:53:07 -48.4 Dark Down 55.3 225.0 Up 10:38:07 - 11:08:07 913
Klamath Falls 10:53:06 -48.4 Dark Down 55.5 225.5 Up 10:38:06 - 11:08:06 879
Lakeview 10:53:01 -47.4 Dark Down 54.7 227.5 Up 10:38:01 - 11:08:01 878
Tulelake 10:53:05 -48.3 Dark Down 55.5 226.2 Up 10:38:05 - 11:08:05 853
Cedarville 10:53:00 -47.4 Dark Down 55.1 228.4 Up 10:38:00 - 11:08:00 813
Fall River/Burney 10:53:04 -48.4 Dark Down 56.1 227.3 Up 10:38:04 - 11:08:04 762
Niwot 10:52:14 -36.4 Dark Down 46.3 247.0 Up 10:37:14 - 11:07:14 747
Susanville 10:53:01 -48.0 Dark Down 56.1 229.0 Up 10:38:01 - 11:08:01 700
Greenville 10:53:01 -48.3 Dark Down 56.4 228.9 Up 10:38:01 - 11:08:01 671
Gimple 10:53:01 -48.2 Dark Down 56.4 229.0 Up 10:38:01 - 11:08:01 671
Quincy 10:53:01 -48.3 Dark Down 56.6 229.1 Up 10:38:01 - 11:08:01 651
Portola 10:53:00 -48.0 Dark Down 56.4 229.9 Up 10:38:00 - 11:08:00 639
Reno 10:52:57 -47.6 Dark Down 56.1 231.1 Up 10:37:57 - 11:07:57 613
Carson City 10:52:57 -47.6 Dark Down 56.4 231.6 Up 10:37:57 - 11:07:57 577
Yerington 10:52:55 -47.2 Dark Down 56.1 232.6 Up 10:37:55 - 11:07:55 559
Gardnerville 10:52:57 -47.6 Dark Down 56.5 231.9 Up 10:37:57 - 11:07:57 552
Hawthorne 10:52:53 -46.8 Dark Down 56.0 233.9 Up 10:37:53 - 11:07:53 512
Tonopah 10:52:48 -45.8 Dark Down 55.4 236.2 Up 10:37:48 - 11:07:48 469
Lee Vining 10:52:54 -47.3 Dark Down 56.7 233.9 Up 10:37:54 - 11:07:54 453
Bishop 10:52:51 -46.8 Dark Down 56.6 235.6 Up 10:37:51 - 11:07:51 394
Beatty 10:52:45 -45.6 Dark Down 55.7 238.2 Up 10:37:45 - 11:07:45 351
Indian Springs 10:52:41 -44.7 Dark Down 55.2 239.9 Up 10:37:41 - 11:07:41 322
Lone Pine 10:52:49 -46.6 Dark Down 56.8 237.0 Up 10:37:49 - 11:07:49 316
Henderson 10:52:39 -44.2 Dark Down 55.0 241.3 Up 10:37:39 - 11:07:39 269
Searchlight/Boulder City 10:52:38 -44.2 Dark Down 55.2 242.1 Up 10:37:38 - 11:07:38 210
Patrick 10:52:34 -43.4 Dark Down 54.5 243.4 Up 10:37:34 - 11:07:34 209
Kingman/Dolan Springs 10:52:35 -43.5 Dark Down 54.7 243.4 Up 10:37:35 - 11:07:35 185
DCO 10:52:32 -42.8 Dark Down 54.1 244.5 Up 10:37:32 - 11:07:32 181
Laughlin/Bullhead City 10:52:36 -43.9 Dark Down 55.1 242.9 Up 10:37:36 - 11:07:36 180
CPSLO 10:52:57 -48.8 Dark Down 59.2 235.3 Up 10:37:57 - 11:07:57 174
Mohave Valley 10:52:36 -43.9 Dark Down 55.2 243.2 Up 10:37:36 - 11:07:36 152
Lake Havasu City 10:52:35 -43.7 Dark Down 55.2 244.0 Up 10:37:35 - 11:07:35 111
Parker 10:52:34 -43.7 Dark Down 55.3 244.5 Up 10:37:34 - 11:07:34 74
Wildwood 10:52:49 -47.3 Dark Down 58.5 239.7 Up 10:37:49 - 11:07:49 52
Idyllwild 10:52:42 -45.7 Dark Down 57.3 242.4 Up 10:37:42 - 11:07:42 21
Blythe 10:52:35 -44.0 Dark Down 55.8 244.9 Up 10:37:35 - 11:07:35 18
Calipatria 10:52:38 -44.8 Dark Down 56.7 244.6 Up 10:37:38 - 11:07:38 -39
Yuma 10:52:34 -44.0 Dark Down 56.2 246.1 Up 10:37:34 - 11:07:34 -80

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 10:55UT)
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 11.7       129
Positions are for J2000

Event circumstances last updated at 2018/06/05 16:37:17 UT

Marc W. Buie, Southwest Research Institute

RECON