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 05:57:32.0 +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 1007 seconds.
The 1-sigma cross-track error in the shadow position is 5003 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 0.9 sigma about the mid-time.
The median site spacing is 21.6 km RECON observability=1.0 and success probability=5.7%
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 6762
Tonasket 09:44:37 -57.0 Dark Down 41.2 241.6 Up 09:29:37 - 09:59:37 6742
Okanogan 09:44:36 -57.3 Dark Down 41.4 241.7 Up 09:29:36 - 09:59:36 6711
Brewster 09:44:36 -57.6 Dark Down 41.7 241.7 Up 09:29:36 - 09:59:36 6685
Manson/Chelan 09:44:36 -57.9 Dark Down 42.0 241.5 Up 09:29:36 - 09:59:36 6661
Entiat 09:44:36 -58.1 Dark Down 42.1 241.6 Up 09:29:36 - 09:59:36 6641
Wenatchee 09:44:35 -58.3 Dark Down 42.3 241.7 Up 09:29:35 - 09:59:35 6617
Ellensburg 09:44:35 -58.7 Dark Down 42.6 241.8 Up 09:29:35 - 09:59:35 6578
Yakima 09:44:34 -59.0 Dark Down 42.8 242.1 Up 09:29:34 - 09:59:34 6542
Pasco 09:44:30 -58.5 Dark Down 42.1 243.8 Up 09:29:30 - 09:59:30 6531
Toppenish/White Swan 09:44:33 -59.1 Dark Down 42.8 242.5 Up 09:29:33 - 09:59:33 6525
PNWRO 09:44:29 -58.5 Dark Down 42.1 244.3 Up 09:29:29 - 09:59:29 6512
George/Umatilla 09:44:30 -58.8 Dark Down 42.4 243.9 Up 09:29:30 - 09:59:30 6498
Goldendale 09:44:33 -59.7 Dark Down 43.4 242.5 Up 09:29:33 - 09:59:33 6469
The Dalles 09:44:34 -60.0 Dark Down 43.7 242.3 Up 09:29:34 - 09:59:34 6444
Maupin 09:44:33 -60.2 Dark Down 43.8 242.8 Up 09:29:33 - 09:59:33 6407
Madras/Culver 09:44:31 -60.6 Dark Down 44.1 243.2 Up 09:29:31 - 09:59:31 6357
Redmond 09:44:31 -60.9 Dark Down 44.3 243.5 Up 09:29:31 - 09:59:31 6324
Sisters 09:44:32 -61.1 Dark Down 44.5 243.0 Up 09:29:32 - 09:59:32 6320
Bend 09:44:31 -61.1 Dark Down 44.5 243.5 Up 09:29:31 - 09:59:31 6302
Oregon Observatory 09:44:31 -61.3 Dark Down 44.6 243.5 Up 09:29:31 - 09:59:31 6284
La Pine/Gilchrist 09:44:30 -61.5 Dark Down 44.8 243.6 Up 09:29:30 - 09:59:30 6264
North Lake 09:44:28 -61.4 Dark Down 44.6 244.6 Up 09:29:28 - 09:59:28 6232
Niwot 09:43:45 -52.5 Dark Down 34.4 260.4 Up 09:28:45 - 09:58:45 6201
Paisley 09:44:26 -61.5 Dark Down 44.6 245.5 Up 09:29:26 - 09:59:26 6186
Chiloquin 09:44:29 -62.4 Dark Down 45.5 244.3 Up 09:29:29 - 09:59:29 6156
Lakeview 09:44:24 -61.7 Dark Down 44.7 246.1 Up 09:29:24 - 09:59:24 6142
Klamath Falls 09:44:28 -62.5 Dark Down 45.6 244.7 Up 09:29:28 - 09:59:28 6125
Tulelake 09:44:27 -62.5 Dark Down 45.5 245.2 Up 09:29:27 - 09:59:27 6104
Cedarville 09:44:22 -62.0 Dark Down 44.8 246.9 Up 09:29:22 - 09:59:22 6082
Fall River/Burney 09:44:25 -63.0 Dark Down 45.8 246.1 Up 09:29:25 - 09:59:25 6019
Susanville 09:44:22 -63.0 Dark Down 45.6 247.4 Up 09:29:22 - 09:59:22 5970
Gimple 09:44:21 -63.2 Dark Down 45.8 247.5 Up 09:29:21 - 09:59:21 5940
Greenville 09:44:21 -63.3 Dark Down 45.9 247.4 Up 09:29:21 - 09:59:21 5939
Quincy 09:44:21 -63.4 Dark Down 46.0 247.6 Up 09:29:21 - 09:59:21 5920
Portola 09:44:20 -63.2 Dark Down 45.7 248.2 Up 09:29:20 - 09:59:20 5915
Reno 09:44:17 -62.9 Dark Down 45.3 249.0 Up 09:29:17 - 09:59:17 5899
Carson City 09:44:16 -63.1 Dark Down 45.4 249.4 Up 09:29:16 - 09:59:16 5865
Yerington 09:44:15 -62.8 Dark Down 45.0 250.1 Up 09:29:15 - 09:59:15 5856
Gardnerville 09:44:16 -63.2 Dark Down 45.5 249.6 Up 09:29:16 - 09:59:16 5842
Hawthorne 09:44:13 -62.6 Dark Down 44.8 251.0 Up 09:29:13 - 09:59:13 5819
Tonopah 09:44:08 -61.9 Dark Down 43.9 252.7 Up 09:29:08 - 09:59:08 5796
Lee Vining 09:44:13 -63.2 Dark Down 45.4 251.1 Up 09:29:13 - 09:59:13 5756
Bishop 09:44:09 -63.0 Dark Down 45.0 252.3 Up 09:29:09 - 09:59:09 5710
Beatty 09:44:04 -62.0 Dark Down 43.9 254.1 Up 09:29:04 - 09:59:04 5691
Indian Springs 09:44:01 -61.3 Dark Down 43.2 255.2 Up 09:29:01 - 09:59:01 5677
Lone Pine 09:44:07 -63.1 Dark Down 45.0 253.3 Up 09:29:07 - 09:59:07 5641
Henderson 09:43:58 -61.0 Dark Down 42.8 256.3 Up 09:28:58 - 09:58:58 5637
Patrick 09:43:54 -60.4 Dark Down 42.0 257.6 Up 09:28:54 - 09:58:54 5595
Searchlight/Boulder City 09:43:57 -61.2 Dark Down 42.9 256.8 Up 09:28:57 - 09:58:57 5582
DCO 09:43:51 -59.9 Dark Down 41.5 258.4 Up 09:28:51 - 09:58:51 5577
Kingman/Dolan Springs 09:43:55 -60.6 Dark Down 42.2 257.7 Up 09:28:55 - 09:58:55 5570
Laughlin/Bullhead City 09:43:55 -61.0 Dark Down 42.7 257.3 Up 09:28:55 - 09:58:55 5558
Mohave Valley 09:43:55 -61.1 Dark Down 42.7 257.6 Up 09:28:55 - 09:58:55 5532
Lake Havasu City 09:43:53 -61.0 Dark Down 42.6 258.1 Up 09:28:53 - 09:58:53 5496
CPSLO 09:44:12 -65.5 Dark Down 47.4 252.4 Up 09:29:12 - 09:59:12 5470
Parker 09:43:52 -61.1 Dark Down 42.7 258.5 Up 09:28:52 - 09:58:52 5462
Blythe 09:43:52 -61.5 Dark Down 43.0 258.7 Up 09:28:52 - 09:58:52 5404
Wildwood 09:44:04 -64.4 Dark Down 46.1 255.3 Up 09:29:04 - 09:59:04 5383
Idyllwild 09:43:58 -63.1 Dark Down 44.7 257.1 Up 09:28:58 - 09:58:58 5379
Calipatria 09:43:54 -62.3 Dark Down 43.9 258.5 Up 09:28:54 - 09:58:54 5338
Yuma 09:43:51 -61.7 Dark Down 43.2 259.5 Up 09:28:51 - 09:58:51 5311

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        05:52:22.2 +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 2017/12/05 19:10:02 UT

Marc W. Buie, Southwest Research Institute

RECON