RECON: TNO occultation with 69986

Event between (69986) 98WW24 and star UC4-526-020426 with event index number of 166728

Geocentric closest approach at 2018/12/01 06:43:22 UTC

J2000 position of star is 06:00:06.5 +15:01:37
Equinox of date position of star is 06:01:06.8 +15:01:36
Stellar brightness R=15.2, use SENSEUP=128
Star is 86 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=23.3

[RECON map]
TNO is 34.8 AU from the Sun and 33.8 AU from the Earth.
The TNO is moving 23.3 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 970 seconds.
The 1-sigma cross-track error in the shadow position is 4595 km.
The sky-plane scale is 24544.7 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=158.5 km assuming a 5% albedo -- 6.8 sec chord
Diameter=64.7 km assuming a 30% albedo -- 2.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69986, (2018/12/01 06:43UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:11.8 +07:24:33  0.4  7.72  88
Alhena         06:38:48.3 +16:22:54  1.9  9.15  77
137 Tau        05:53:26.8 +14:10:30  5.5  2.06  88
PPM 121745     06:01:46.1 +14:57:23  7.9  0.16  86
PPM 121730     06:01:20.0 +15:07:50  8.8  0.11  86
69986          06:01:11.4 +15:01:36 15.2        86
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 0.9 sigma about the mid-time.
The median site spacing is 20.4 km RECON observability=1.0 and success probability=9.6%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:44:56 -60.2 Dark Down 44.0 124.0 Up 06:29:56 - 06:59:56 48
Tonasket 06:44:56 -60.4 Dark Down 44.1 123.8 Up 06:29:56 - 06:59:56 29
Okanogan 06:44:57 -60.7 Dark Down 44.2 123.4 Up 06:29:57 - 06:59:57 8
Brewster 06:44:59 -60.8 Dark Down 44.3 122.9 Up 06:29:59 - 06:59:59 -21
Manson/Chelan 06:45:00 -60.9 Dark Down 44.2 122.4 Up 06:30:00 - 07:00:00 -27
Entiat 06:45:01 -61.0 Dark Down 44.2 122.1 Up 06:30:01 - 07:00:01 -43
Wenatchee 06:45:02 -61.2 Dark Down 44.3 121.8 Up 06:30:02 - 07:00:02 -62
Ellensburg 06:45:03 -61.5 Dark Down 44.4 121.2 Up 06:30:03 - 07:00:03 -92
Yakima 06:45:04 -61.8 Dark Down 44.6 120.9 Up 06:30:04 - 07:00:04 -126
Toppenish/White Swan 06:45:05 -62.1 Dark Down 44.8 120.9 Up 06:30:05 - 07:00:05 -148
Pasco 06:45:02 -62.6 Dark Down 45.6 122.1 Up 06:30:02 - 07:00:02 -182
Goldendale 06:45:07 -62.4 Dark Down 44.9 119.9 Up 06:30:07 - 07:00:07 -186
The Dalles 06:45:09 -62.4 Dark Down 44.8 119.4 Up 06:30:09 - 07:00:09 -198
George/Umatilla 06:45:03 -62.8 Dark Down 45.7 121.6 Up 06:30:03 - 07:00:03 -207
PNWRO 06:45:02 -62.9 Dark Down 45.9 122.2 Up 06:30:02 - 07:00:02 -207
Maupin 06:45:10 -62.8 Dark Down 45.0 119.1 Up 06:30:10 - 07:00:10 -236
Madras/Culver 06:45:11 -63.2 Dark Down 45.3 118.6 Up 06:30:11 - 07:00:11 -282
Sisters 06:45:13 -63.3 Dark Down 45.1 117.8 Up 06:30:13 - 07:00:13 -302
Redmond 06:45:12 -63.5 Dark Down 45.4 118.2 Up 06:30:12 - 07:00:12 -312
Bend 06:45:13 -63.6 Dark Down 45.4 117.9 Up 06:30:13 - 07:00:13 -327
Oregon Observatory 06:45:13 -63.7 Dark Down 45.4 117.6 Up 06:30:13 - 07:00:13 -340
La Pine/Gilchrist 06:45:14 -63.8 Dark Down 45.5 117.4 Up 06:30:14 - 07:00:14 -356
North Lake 06:45:14 -64.4 Dark Down 46.1 117.6 Up 06:30:14 - 07:00:14 -406
Chiloquin 06:45:18 -64.5 Dark Down 45.8 116.0 Up 06:30:18 - 07:00:18 -447
Paisley 06:45:14 -65.0 Dark Down 46.6 117.5 Up 06:30:14 - 07:00:14 -462
Klamath Falls 06:45:19 -64.8 Dark Down 46.0 115.8 Up 06:30:19 - 07:00:19 -479
Tulelake 06:45:19 -65.1 Dark Down 46.3 115.8 Up 06:30:19 - 07:00:19 -509
Lakeview 06:45:15 -65.5 Dark Down 46.9 117.2 Up 06:30:15 - 07:00:15 -511
Cedarville 06:45:16 -66.1 Dark Down 47.3 116.7 Up 06:30:16 - 07:00:16 -573
Fall River/Burney 06:45:20 -65.8 Dark Down 46.7 115.1 Up 06:30:20 - 07:00:20 -592
Susanville 06:45:20 -66.7 Dark Down 47.5 115.2 Up 06:30:20 - 07:00:20 -664
Greenville 06:45:21 -66.7 Dark Down 47.4 114.6 Up 06:30:21 - 07:00:21 -683
Gimple 06:45:21 -66.8 Dark Down 47.5 114.7 Up 06:30:21 - 07:00:21 -685
Quincy 06:45:22 -66.9 Dark Down 47.5 114.4 Up 06:30:22 - 07:00:22 -702
Portola 06:45:21 -67.2 Dark Down 47.9 114.8 Up 06:30:21 - 07:00:21 -723
Reno 06:45:20 -67.8 Dark Down 48.5 115.1 Up 06:30:20 - 07:00:20 -761
Carson City 06:45:20 -68.0 Dark Down 48.6 114.8 Up 06:30:20 - 07:00:20 -794
Gardnerville 06:45:21 -68.3 Dark Down 48.8 114.6 Up 06:30:21 - 07:00:21 -818
Yerington 06:45:19 -68.5 Dark Down 49.2 115.2 Up 06:30:19 - 07:00:19 -826
Hawthorne 06:45:19 -69.1 Dark Down 49.7 115.3 Up 06:30:19 - 07:00:19 -880
Lee Vining 06:45:21 -69.3 Dark Down 49.6 114.2 Up 06:30:21 - 07:00:21 -922
Tonopah 06:45:16 -70.2 Dark Down 50.9 116.2 Up 06:30:16 - 07:00:16 -953
Niwot 06:44:31 -71.7 Dark Down 57.3 133.3 Up 06:29:31 - 06:59:31 -990
Bishop 06:45:20 -70.1 Dark Down 50.4 114.3 Up 06:30:20 - 07:00:20 -994
Beatty 06:45:17 -71.3 Dark Down 51.8 115.4 Up 06:30:17 - 07:00:17 -1073
Lone Pine 06:45:21 -70.9 Dark Down 50.9 113.8 Up 06:30:21 - 07:00:21 -1074
Indian Springs 06:45:14 -72.1 Dark Down 52.7 116.1 Up 06:30:14 - 07:00:14 -1126
CPSLO 06:45:32 -70.2 Dark Down 49.5 109.9 Up 06:30:32 - 07:00:32 -1141
Henderson 06:45:13 -72.9 Dark Down 53.4 116.2 Up 06:30:13 - 07:00:13 -1192
Searchlight/Boulder City 06:45:14 -73.4 Dark Down 53.7 115.6 Up 06:30:14 - 07:00:14 -1249
Patrick 06:45:10 -73.9 Dark Down 54.5 116.7 Up 06:30:10 - 07:00:10 -1276
Laughlin/Bullhead City 06:45:13 -73.8 Dark Down 54.1 115.6 Up 06:30:13 - 07:00:13 -1285
Kingman/Dolan Springs 06:45:12 -74.0 Dark Down 54.5 116.2 Up 06:30:12 - 07:00:12 -1294
Wildwood 06:45:28 -72.3 Dark Down 51.5 110.4 Up 06:30:28 - 07:00:28 -1303
Mohave Valley 06:45:14 -74.0 Dark Down 54.2 115.3 Up 06:30:14 - 07:00:14 -1312
DCO 06:45:09 -74.5 Dark Down 55.1 117.0 Up 06:30:09 - 07:00:09 -1320
Lake Havasu City 06:45:14 -74.4 Dark Down 54.6 115.0 Up 06:30:14 - 07:00:14 -1356
Idyllwild 06:45:23 -73.7 Dark Down 53.1 111.7 Up 06:30:23 - 07:00:23 -1379
Parker 06:45:14 -74.7 Dark Down 54.7 114.6 Up 06:30:14 - 07:00:14 -1392
Blythe 06:45:16 -75.0 Dark Down 54.7 113.6 Up 06:30:16 - 07:00:16 -1437
Calipatria 06:45:20 -74.8 Dark Down 54.2 112.1 Up 06:30:20 - 07:00:20 -1465
Yuma 06:45:18 -75.7 Dark Down 55.1 112.4 Up 06:30:18 - 07:00:18 -1527

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, (2018/12/01 06:43UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  7.72  88
Alhena         06:37:42.8 +16:23:57  1.9  9.15  77
137 Tau        05:52:22.3 +14:10:18  5.5  2.06  88
PPM 121745     06:00:41.2 +14:57:25  7.9  0.16  86
PPM 121730     06:00:15.0 +15:07:52  8.8  0.11  86
69986          06:00:06.5 +15:01:37 15.2        86
Positions are for J2000

Event circumstances last updated at 2017/08/03 16:26:41 UT

Marc W. Buie, Southwest Research Institute

RECON