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 06:01:08.3 +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 1001 seconds.
The 1-sigma cross-track error in the shadow position is 4730 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 20.2 km RECON observability=1.0 and success probability=9.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:44:57 -60.2 Dark Down 44.0 124.0 Up 06:29:57 - 06:59:57 53
Tonasket 06:44:57 -60.4 Dark Down 44.1 123.8 Up 06:29:57 - 06:59:57 34
Okanogan 06:44:59 -60.7 Dark Down 44.2 123.4 Up 06:29:59 - 06:59:59 9
Brewster 06:45:00 -60.8 Dark Down 44.3 122.9 Up 06:30:00 - 07:00:00 -11
Manson/Chelan 06:45:01 -60.9 Dark Down 44.2 122.4 Up 06:30:01 - 07:00:01 -21
Entiat 06:45:02 -61.0 Dark Down 44.2 122.1 Up 06:30:02 - 07:00:02 -38
Wenatchee 06:45:02 -61.2 Dark Down 44.3 121.8 Up 06:30:02 - 07:00:02 -57
Ellensburg 06:45:04 -61.5 Dark Down 44.4 121.2 Up 06:30:04 - 07:00:04 -87
Yakima 06:45:06 -61.8 Dark Down 44.6 120.9 Up 06:30:06 - 07:00:06 -121
Toppenish/White Swan 06:45:06 -62.1 Dark Down 44.8 120.9 Up 06:30:06 - 07:00:06 -142
Pasco 06:45:02 -62.6 Dark Down 45.6 122.1 Up 06:30:02 - 07:00:02 -176
Goldendale 06:45:08 -62.4 Dark Down 44.9 120.0 Up 06:30:08 - 07:00:08 -181
The Dalles 06:45:10 -62.4 Dark Down 44.8 119.4 Up 06:30:10 - 07:00:10 -193
George/Umatilla 06:45:04 -62.8 Dark Down 45.7 121.6 Up 06:30:04 - 07:00:04 -201
PNWRO 06:45:03 -62.9 Dark Down 45.9 122.2 Up 06:30:03 - 07:00:03 -202
Maupin 06:45:10 -62.8 Dark Down 45.0 119.1 Up 06:30:10 - 07:00:10 -231
Madras/Culver 06:45:12 -63.2 Dark Down 45.3 118.6 Up 06:30:12 - 07:00:12 -277
Sisters 06:45:14 -63.3 Dark Down 45.2 117.9 Up 06:30:14 - 07:00:14 -297
Redmond 06:45:13 -63.5 Dark Down 45.4 118.2 Up 06:30:13 - 07:00:13 -307
Bend 06:45:14 -63.6 Dark Down 45.4 117.9 Up 06:30:14 - 07:00:14 -322
Oregon Observatory 06:45:14 -63.7 Dark Down 45.4 117.6 Up 06:30:14 - 07:00:14 -335
La Pine/Gilchrist 06:45:15 -63.8 Dark Down 45.5 117.4 Up 06:30:15 - 07:00:15 -351
North Lake 06:45:15 -64.4 Dark Down 46.1 117.6 Up 06:30:15 - 07:00:15 -401
Chiloquin 06:45:19 -64.5 Dark Down 45.8 116.0 Up 06:30:19 - 07:00:19 -442
Paisley 06:45:15 -65.0 Dark Down 46.6 117.5 Up 06:30:15 - 07:00:15 -457
Klamath Falls 06:45:20 -64.8 Dark Down 46.0 115.8 Up 06:30:20 - 07:00:20 -474
Tulelake 06:45:19 -65.1 Dark Down 46.3 115.8 Up 06:30:19 - 07:00:19 -504
Lakeview 06:45:16 -65.5 Dark Down 46.9 117.2 Up 06:30:16 - 07:00:16 -506
Cedarville 06:45:17 -66.1 Dark Down 47.3 116.7 Up 06:30:17 - 07:00:17 -568
Fall River/Burney 06:45:21 -65.8 Dark Down 46.7 115.1 Up 06:30:21 - 07:00:21 -587
Susanville 06:45:21 -66.7 Dark Down 47.5 115.2 Up 06:30:21 - 07:00:21 -659
Greenville 06:45:22 -66.7 Dark Down 47.4 114.6 Up 06:30:22 - 07:00:22 -678
Gimple 06:45:22 -66.8 Dark Down 47.5 114.7 Up 06:30:22 - 07:00:22 -680
Quincy 06:45:23 -66.9 Dark Down 47.5 114.4 Up 06:30:23 - 07:00:23 -696
Portola 06:45:22 -67.2 Dark Down 47.9 114.8 Up 06:30:22 - 07:00:22 -718
Reno 06:45:20 -67.8 Dark Down 48.5 115.1 Up 06:30:20 - 07:00:20 -756
Carson City 06:45:21 -68.1 Dark Down 48.6 114.8 Up 06:30:21 - 07:00:21 -789
Gardnerville 06:45:22 -68.3 Dark Down 48.8 114.6 Up 06:30:22 - 07:00:22 -813
Yerington 06:45:20 -68.5 Dark Down 49.2 115.2 Up 06:30:20 - 07:00:20 -821
Hawthorne 06:45:20 -69.1 Dark Down 49.7 115.3 Up 06:30:20 - 07:00:20 -875
Lee Vining 06:45:22 -69.3 Dark Down 49.6 114.2 Up 06:30:22 - 07:00:22 -917
Tonopah 06:45:17 -70.2 Dark Down 50.9 116.2 Up 06:30:17 - 07:00:17 -948
Niwot 06:44:31 -71.7 Dark Down 57.3 133.3 Up 06:29:31 - 06:59:31 -989
Bishop 06:45:21 -70.1 Dark Down 50.4 114.3 Up 06:30:21 - 07:00:21 -989
Beatty 06:45:17 -71.3 Dark Down 51.8 115.4 Up 06:30:17 - 07:00:17 -1067
Lone Pine 06:45:22 -70.9 Dark Down 50.9 113.8 Up 06:30:22 - 07:00:22 -1068
Indian Springs 06:45:15 -72.1 Dark Down 52.7 116.1 Up 06:30:15 - 07:00:15 -1121
CPSLO 06:45:32 -70.2 Dark Down 49.5 109.9 Up 06:30:32 - 07:00:32 -1135
Henderson 06:45:14 -72.9 Dark Down 53.4 116.2 Up 06:30:14 - 07:00:14 -1187
Searchlight/Boulder City 06:45:15 -73.4 Dark Down 53.7 115.6 Up 06:30:15 - 07:00:15 -1244
Patrick 06:45:12 -73.9 Dark Down 54.5 116.7 Up 06:30:12 - 07:00:12 -1271
Laughlin/Bullhead City 06:45:14 -73.8 Dark Down 54.1 115.6 Up 06:30:14 - 07:00:14 -1280
Kingman/Dolan Springs 06:45:13 -74.0 Dark Down 54.5 116.2 Up 06:30:13 - 07:00:13 -1288
Wildwood 06:45:29 -72.3 Dark Down 51.5 110.4 Up 06:30:29 - 07:00:29 -1297
Mohave Valley 06:45:15 -74.0 Dark Down 54.2 115.3 Up 06:30:15 - 07:00:15 -1306
DCO 06:45:10 -74.5 Dark Down 55.1 117.0 Up 06:30:10 - 07:00:10 -1315
Lake Havasu City 06:45:15 -74.4 Dark Down 54.6 115.0 Up 06:30:15 - 07:00:15 -1351
Idyllwild 06:45:24 -73.7 Dark Down 53.1 111.7 Up 06:30:24 - 07:00:24 -1374
Parker 06:45:15 -74.7 Dark Down 54.7 114.6 Up 06:30:15 - 07:00:15 -1386
Blythe 06:45:17 -75.0 Dark Down 54.7 113.6 Up 06:30:17 - 07:00:17 -1431
Calipatria 06:45:21 -74.8 Dark Down 54.2 112.1 Up 06:30:21 - 07:00:21 -1459
Yuma 06:45:19 -75.7 Dark Down 55.1 112.4 Up 06:30:19 - 07:00:19 -1521

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        05:52:22.2 +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 2018/01/09 17:45:28 UT

Marc W. Buie, Southwest Research Institute

RECON