RECON: TNO occultation with 69986

Event between (69986) 98WW24 and star GA1040:01333436 with event index number of 340420

Geocentric closest approach at 2019/01/01 05:46:02 UTC

J2000 position of star is 05:57:01.0 +14:58:57
Equinox of date position of star is 05:58:05.7 +14:59:01
Stellar brightness G=16.6, use SENSEUP=128
Star is 136 degrees from the moon. Moon is 22% 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 24.6 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 164 seconds.
The 1-sigma cross-track error in the shadow position is 1459 km.
The sky-plane scale is 24525.6 km/arcsec.

The TNO has an absolute magnitude Hv=8.0
Diameter=151.4 km assuming a 5% albedo -- 6.2 sec chord
Diameter=61.8 km assuming a 30% albedo -- 2.5 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69986, (2019/01/01 05:46UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.1 +07:24:33  0.4  7.59 136
Alhena         06:38:48.6 +16:22:53  1.9  9.90 127
137 Tau        05:53:27.1 +14:10:30  5.5  1.39 137
PPM 121630     05:57:54.0 +15:04:54  8.5  0.11 136
69986          05:58:06.3 +14:59:01 16.6       136
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 22.3 km RECON observability=1.0 and success probability=28.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 05:47:00 -52.5 Dark Down 51.0 146.1 Up 05:32:50 - 06:01:10 -170
Summerland 05:47:00 -52.4 Dark Down 50.9 145.5 Up 05:32:50 - 06:01:10 -180
Penticton 05:47:00 -52.6 Dark Down 51.3 145.6 Up 05:32:50 - 06:01:10 -207
Okanagan Falls 05:47:00 -52.7 Dark Down 51.4 145.4 Up 05:32:50 - 06:01:10 -225
Oliver 05:47:00 -52.8 Dark Down 51.6 145.3 Up 05:32:50 - 06:01:10 -240
Anarchist Mountain Observatory 05:47:00 -53.0 Dark Down 51.8 145.5 Up 05:32:50 - 06:01:10 -254
Oroville 05:47:00 -53.0 Dark Down 51.8 145.3 Up 05:32:50 - 06:01:10 -262
Tonasket 05:47:00 -53.2 Dark Down 52.0 145.2 Up 05:32:50 - 06:01:10 -284
Okanogan 05:47:00 -53.2 Dark Down 52.2 144.7 Up 05:32:50 - 06:01:10 -319
Brewster 05:47:00 -53.3 Dark Down 52.4 144.2 Up 05:32:50 - 06:01:10 -349
Manson/Chelan 05:47:00 -53.2 Dark Down 52.4 143.5 Up 05:32:50 - 06:01:10 -377
Entiat 05:47:00 -53.2 Dark Down 52.5 143.2 Up 05:32:50 - 06:01:10 -400
Ellensburg 05:47:08 -53.4 Dark Down 53.0 142.3 Up 05:32:58 - 06:01:18 -416
Wenatchee 05:47:00 -53.3 Dark Down 52.7 142.9 Up 05:32:50 - 06:01:10 -427
Yakima 05:47:09 -53.6 Dark Down 53.3 142.0 Up 05:32:59 - 06:01:19 -454
Toppenish/White Swan 05:47:09 -53.8 Dark Down 53.5 142.0 Up 05:32:59 - 06:01:19 -475
Pasco 05:47:00 -54.6 Dark Down 54.1 143.7 Up 05:32:50 - 06:01:10 -518
Goldendale 05:47:11 -53.8 Dark Down 53.8 140.9 Up 05:33:01 - 06:01:21 -523
PNWRO 05:47:00 -54.9 Dark Down 54.4 143.9 Up 05:32:50 - 06:01:10 -539
The Dalles 05:47:12 -53.7 Dark Down 53.8 140.2 Up 05:33:02 - 06:01:22 -541
George/Umatilla 05:47:00 -54.6 Dark Down 54.3 143.1 Up 05:32:50 - 06:01:10 -554
Maupin 05:47:12 -53.9 Dark Down 54.1 140.0 Up 05:33:02 - 06:01:22 -582
Madras/Culver 05:47:13 -54.1 Dark Down 54.5 139.5 Up 05:33:03 - 06:01:23 -633
Sisters 05:47:15 -54.0 Dark Down 54.6 138.5 Up 05:33:05 - 06:01:25 -660
Redmond 05:47:14 -54.2 Dark Down 54.8 139.1 Up 05:33:04 - 06:01:24 -666
Bend 05:47:15 -54.2 Dark Down 54.9 138.7 Up 05:33:05 - 06:01:25 -685
Oregon Observatory 05:47:15 -54.2 Dark Down 55.0 138.3 Up 05:33:05 - 06:01:25 -701
La Pine/Gilchrist 05:47:15 -54.3 Dark Down 55.1 138.0 Up 05:33:05 - 06:01:25 -720
North Lake 05:47:15 -54.9 Dark Down 55.7 138.5 Up 05:33:05 - 06:01:25 -767
Paisley 05:47:14 -55.3 Dark Down 56.3 138.5 Up 05:33:04 - 06:01:24 -823
Chiloquin 05:47:18 -54.5 Dark Down 55.7 136.4 Up 05:33:08 - 06:01:28 -823
Klamath Falls 05:47:18 -54.7 Dark Down 56.0 136.2 Up 05:33:08 - 06:01:28 -857
Lakeview 05:47:14 -55.6 Dark Down 56.8 138.3 Up 05:33:04 - 06:01:24 -874
Tulelake 05:47:18 -55.0 Dark Down 56.4 136.4 Up 05:33:08 - 06:01:28 -886
Cedarville 05:47:14 -56.0 Dark Down 57.3 137.9 Up 05:33:04 - 06:01:24 -940
Fall River/Burney 05:47:18 -55.3 Dark Down 57.1 135.5 Up 05:33:08 - 06:01:28 -976
Susanville 05:47:17 -56.1 Dark Down 57.9 135.9 Up 05:33:07 - 06:01:27 -1044
Greenville 05:47:18 -56.0 Dark Down 57.9 135.2 Up 05:33:08 - 06:01:28 -1069
Gimple 05:47:18 -56.0 Dark Down 58.0 135.3 Up 05:33:08 - 06:01:28 -1070
Quincy 05:47:18 -56.0 Dark Down 58.1 135.0 Up 05:33:08 - 06:01:28 -1089
Portola 05:47:17 -56.4 Dark Down 58.4 135.5 Up 05:33:07 - 06:01:27 -1106
Reno 05:47:15 -57.0 Dark Down 59.0 136.2 Up 05:33:05 - 06:01:25 -1138
Carson City 05:47:15 -57.1 Dark Down 59.2 135.9 Up 05:33:05 - 06:01:25 -1174
Niwot 05:46:27 -66.3 Dark Down 64.1 163.9 Up 05:32:17 - 06:00:37 -1176
Gardnerville 05:47:16 -57.2 Dark Down 59.4 135.6 Up 05:33:06 - 06:01:26 -1199
Yerington 05:47:14 -57.6 Dark Down 59.7 136.6 Up 05:33:04 - 06:01:24 -1199
Hawthorne 05:47:12 -58.2 Dark Down 60.3 136.9 Up 05:33:02 - 06:01:22 -1251
Lee Vining 05:47:15 -58.0 Dark Down 60.5 135.4 Up 05:33:05 - 06:01:25 -1303
Tonopah 05:47:08 -59.4 Dark Down 61.4 138.7 Up 05:32:58 - 06:01:18 -1310
Bishop 05:47:13 -58.7 Dark Down 61.3 135.9 Up 05:33:03 - 06:01:23 -1370
Beatty 05:47:08 -60.1 Dark Down 62.5 138.0 Up 05:32:58 - 06:01:18 -1431
Lone Pine 05:47:12 -59.2 Dark Down 62.0 135.4 Up 05:33:02 - 06:01:22 -1450
Indian Springs 05:47:00 -61.0 Dark Down 63.3 139.4 Up 05:32:50 - 06:01:10 -1478
Henderson 05:47:00 -61.7 Dark Down 64.1 140.0 Up 05:32:50 - 06:01:10 -1535
CPSLO 05:47:22 -57.6 Dark Down 61.4 129.5 Up 05:33:12 - 06:01:32 -1559
Searchlight/Boulder City 05:47:00 -62.0 Dark Down 64.6 139.4 Up 05:32:50 - 06:01:10 -1594
Patrick 05:46:59 -62.8 Dark Down 65.2 141.3 Up 05:32:49 - 06:01:09 -1606
Laughlin/Bullhead City 05:47:00 -62.3 Dark Down 65.0 139.6 Up 05:32:50 - 06:01:10 -1627
Kingman/Dolan Springs 05:47:00 -62.7 Dark Down 65.2 140.6 Up 05:32:50 - 06:01:10 -1627
DCO 05:46:57 -63.4 Dark Down 65.8 142.3 Up 05:32:47 - 06:01:07 -1643
Mohave Valley 05:47:00 -62.4 Dark Down 65.2 139.2 Up 05:32:50 - 06:01:10 -1655
Lake Havasu City 05:47:00 -62.7 Dark Down 65.6 139.2 Up 05:32:50 - 06:01:10 -1698
Wildwood 05:47:17 -59.5 Dark Down 63.4 131.0 Up 05:33:07 - 06:01:27 -1703
Parker 05:47:00 -62.8 Dark Down 65.9 138.7 Up 05:32:50 - 06:01:10 -1735
Idyllwild 05:47:11 -61.0 Dark Down 64.8 133.6 Up 05:33:01 - 06:01:21 -1757
Blythe 05:47:00 -62.7 Dark Down 66.1 137.3 Up 05:32:50 - 06:01:10 -1789
Calipatria 05:47:00 -62.1 Dark Down 65.9 134.8 Up 05:32:50 - 06:01:10 -1839
Yuma 05:47:00 -62.9 Dark Down 66.8 135.8 Up 05:32:50 - 06:01:10 -1886

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, (2019/01/01 05:46UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  7.59 136
Alhena         06:37:42.8 +16:23:57  1.9  9.90 127
137 Tau        05:52:22.2 +14:10:18  5.5  1.39 137
PPM 121630     05:56:48.7 +15:04:50  8.5  0.11 136
69986          05:57:01.0 +14:58:57 16.6       136
Positions are for J2000

Event circumstances last updated at 2018/11/05 21:14:34 UT

Marc W. Buie, Southwest Research Institute

RECON