RECON: TNO occultation with 69986

Event between (69986) 98WW24 and star UC4-525-019203 with event index number of 171984

Geocentric closest approach at 2019/01/06 09:46:37 UTC

J2000 position of star is 05:56:30.4 +14:58:56
Equinox of date position of star is 05:57:30.8 +14:59:01
Stellar brightness R=15.7, use SENSEUP=128
Star is 158 degrees from the moon. Moon is 0% 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 23.9 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 944 seconds.
The 1-sigma cross-track error in the shadow position is 4707 km.
The sky-plane scale is 24543.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=158.5 km assuming a 5% albedo -- 6.6 sec chord
Diameter=64.7 km assuming a 30% albedo -- 2.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 69986, (2019/01/06 09:47UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:12.1 +07:24:33  0.4  7.58 154
Alhena         06:38:48.6 +16:22:53  1.9 10.02 168
137 Tau        05:53:27.1 +14:10:30  5.5  1.29 157
PPM 121630     05:57:54.0 +15:04:54  8.5  0.12 158
69986          05:57:35.7 +14:59:01 15.7       158
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 1.0 sigma about the mid-time.
The median site spacing is 21.8 km RECON observability=1.0 and success probability=5.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:44:37 -56.9 Dark Down 41.1 241.4 Up 09:29:37 - 09:59:37 6766
Tonasket 09:44:36 -57.0 Dark Down 41.2 241.6 Up 09:29:36 - 09:59:36 6746
Okanogan 09:44:35 -57.3 Dark Down 41.4 241.7 Up 09:29:35 - 09:59:35 6715
Brewster 09:44:35 -57.6 Dark Down 41.7 241.7 Up 09:29:35 - 09:59:35 6689
Manson/Chelan 09:44:36 -57.9 Dark Down 42.0 241.5 Up 09:29:36 - 09:59:36 6666
Entiat 09:44:35 -58.1 Dark Down 42.1 241.6 Up 09:29:35 - 09:59:35 6645
Wenatchee 09:44:35 -58.3 Dark Down 42.3 241.7 Up 09:29:35 - 09:59:35 6622
Ellensburg 09:44:34 -58.7 Dark Down 42.6 241.8 Up 09:29:34 - 09:59:34 6582
Yakima 09:44:34 -59.0 Dark Down 42.8 242.1 Up 09:29:34 - 09:59:34 6546
Pasco 09:44:29 -58.5 Dark Down 42.1 243.8 Up 09:29:29 - 09:59:29 6535
Toppenish/White Swan 09:44:33 -59.1 Dark Down 42.8 242.5 Up 09:29:33 - 09:59:33 6529
PNWRO 09:44:28 -58.5 Dark Down 42.1 244.3 Up 09:29:28 - 09:59:28 6516
George/Umatilla 09:44:29 -58.8 Dark Down 42.4 243.9 Up 09:29:29 - 09:59:29 6502
Goldendale 09:44:33 -59.7 Dark Down 43.4 242.5 Up 09:29:33 - 09:59:33 6473
The Dalles 09:44:33 -60.0 Dark Down 43.7 242.3 Up 09:29:33 - 09:59:33 6448
Maupin 09:44:32 -60.2 Dark Down 43.8 242.8 Up 09:29:32 - 09:59:32 6412
Madras/Culver 09:44:31 -60.6 Dark Down 44.1 243.2 Up 09:29:31 - 09:59:31 6361
Redmond 09:44:30 -60.9 Dark Down 44.3 243.5 Up 09:29:30 - 09:59:30 6328
Sisters 09:44:31 -61.1 Dark Down 44.5 243.0 Up 09:29:31 - 09:59:31 6325
Bend 09:44:30 -61.1 Dark Down 44.5 243.5 Up 09:29:30 - 09:59:30 6306
Oregon Observatory 09:44:30 -61.3 Dark Down 44.6 243.5 Up 09:29:30 - 09:59:30 6289
La Pine/Gilchrist 09:44:30 -61.5 Dark Down 44.8 243.6 Up 09:29:30 - 09:59:30 6269
North Lake 09:44:27 -61.4 Dark Down 44.6 244.6 Up 09:29:27 - 09:59:27 6237
Niwot 09:43:45 -52.5 Dark Down 34.4 260.4 Up 09:28:45 - 09:58:45 6207
Paisley 09:44:25 -61.5 Dark Down 44.6 245.5 Up 09:29:25 - 09:59:25 6191
Chiloquin 09:44:28 -62.4 Dark Down 45.5 244.3 Up 09:29:28 - 09:59:28 6161
Lakeview 09:44:24 -61.7 Dark Down 44.7 246.1 Up 09:29:24 - 09:59:24 6147
Klamath Falls 09:44:27 -62.5 Dark Down 45.6 244.7 Up 09:29:27 - 09:59:27 6130
Tulelake 09:44:26 -62.5 Dark Down 45.5 245.2 Up 09:29:26 - 09:59:26 6108
Cedarville 09:44:22 -62.0 Dark Down 44.8 246.9 Up 09:29:22 - 09:59:22 6087
Fall River/Burney 09:44:24 -63.0 Dark Down 45.8 246.1 Up 09:29:24 - 09:59:24 6024
Susanville 09:44:20 -63.0 Dark Down 45.6 247.4 Up 09:29:20 - 09:59:20 5975
Gimple 09:44:21 -63.2 Dark Down 45.8 247.5 Up 09:29:21 - 09:59:21 5945
Greenville 09:44:21 -63.3 Dark Down 45.9 247.4 Up 09:29:21 - 09:59:21 5944
Quincy 09:44:20 -63.4 Dark Down 46.0 247.6 Up 09:29:20 - 09:59:20 5924
Portola 09:44:19 -63.2 Dark Down 45.7 248.2 Up 09:29:19 - 09:59:19 5920
Reno 09:44:16 -62.9 Dark Down 45.3 249.0 Up 09:29:16 - 09:59:16 5904
Carson City 09:44:16 -63.1 Dark Down 45.4 249.4 Up 09:29:16 - 09:59:16 5870
Yerington 09:44:14 -62.8 Dark Down 45.0 250.1 Up 09:29:14 - 09:59:14 5861
Gardnerville 09:44:16 -63.2 Dark Down 45.5 249.6 Up 09:29:16 - 09:59:16 5847
Hawthorne 09:44:12 -62.6 Dark Down 44.8 251.0 Up 09:29:12 - 09:59:12 5824
Tonopah 09:44:07 -61.9 Dark Down 43.9 252.7 Up 09:29:07 - 09:59:07 5802
Lee Vining 09:44:12 -63.2 Dark Down 45.4 251.1 Up 09:29:12 - 09:59:12 5762
Bishop 09:44:08 -63.0 Dark Down 45.0 252.3 Up 09:29:08 - 09:59:08 5715
Beatty 09:44:03 -62.0 Dark Down 43.9 254.1 Up 09:29:03 - 09:59:03 5697
Indian Springs 09:44:00 -61.4 Dark Down 43.2 255.2 Up 09:29:00 - 09:59:00 5683
Lone Pine 09:44:06 -63.1 Dark Down 45.0 253.3 Up 09:29:06 - 09:59:06 5646
Henderson 09:43:57 -61.0 Dark Down 42.8 256.3 Up 09:28:57 - 09:58:57 5642
Patrick 09:43:54 -60.4 Dark Down 42.0 257.6 Up 09:28:54 - 09:58:54 5600
Searchlight/Boulder City 09:43:56 -61.2 Dark Down 42.9 256.8 Up 09:28:56 - 09:58:56 5587
DCO 09:43:51 -59.9 Dark Down 41.5 258.4 Up 09:28:51 - 09:58:51 5583
Kingman/Dolan Springs 09:43:54 -60.6 Dark Down 42.2 257.7 Up 09:28:54 - 09:58:54 5575
Laughlin/Bullhead City 09:43:55 -61.0 Dark Down 42.7 257.3 Up 09:28:55 - 09:58:55 5564
Mohave Valley 09:43:54 -61.1 Dark Down 42.7 257.6 Up 09:28:54 - 09:58:54 5537
Lake Havasu City 09:43:53 -61.0 Dark Down 42.6 258.1 Up 09:28:53 - 09:58:53 5502
CPSLO 09:44:11 -65.5 Dark Down 47.4 252.4 Up 09:29:11 - 09:59:11 5475
Parker 09:43:52 -61.1 Dark Down 42.7 258.5 Up 09:28:52 - 09:58:52 5467
Blythe 09:43:52 -61.5 Dark Down 43.0 258.7 Up 09:28:52 - 09:58:52 5410
Wildwood 09:44:03 -64.5 Dark Down 46.1 255.3 Up 09:29:03 - 09:59:03 5388
Idyllwild 09:43:57 -63.1 Dark Down 44.7 257.1 Up 09:28:57 - 09:58:57 5384
Calipatria 09:43:53 -62.3 Dark Down 43.9 258.5 Up 09:28:53 - 09:58:53 5344
Yuma 09:43:50 -61.7 Dark Down 43.2 259.5 Up 09:28:50 - 09:58:50 5316

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, (2019/01/06 09:47UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  7.58 154
Alhena         06:37:42.8 +16:23:57  1.9 10.02 168
137 Tau        05:52:22.3 +14:10:18  5.5  1.29 157
PPM 121630     05:56:48.7 +15:04:50  8.5  0.12 158
69986          05:56:30.4 +14:58:56 15.7       158
Positions are for J2000

Event circumstances last updated at 2017/08/04 18:03:58 UT

Marc W. Buie, Southwest Research Institute

RECON