RECON: TNO occultation with 32532

Event between (32532) Thereus and star UC4-442-043255 with event index number of 105683

Geocentric closest approach at 2018/02/09 04:42:34 UTC

J2000 position of star is 08:00:33.1 -01:37:48
Equinox of date position of star is 08:01:26.0 -01:40:43
Stellar brightness R=15.2, use SENSEUP=128
Star is 124 degrees from the moon. Moon is 36% illuminated.
TNO apparent brightness V=20.2

[RECON map]
TNO is 12.7 AU from the Sun and 11.8 AU from the Earth.
The TNO is moving 21.7 km/sec on the sky relative to the star, or, 9.1 arcsec/hr.
The 1-sigma error in the time of the event is 49 seconds.
The 1-sigma cross-track error in the shadow position is 608 km.
The sky-plane scale is 8554.0 km/arcsec.

The TNO has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 4.2 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 32532, (2018/02/09 04:43UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:56.8 -16:44:31 -1.5 23.92 132
15Rho Pup      08:08:18.9 -24:21:27  2.8 22.74 112
27 Mon         08:00:38.4 -03:43:48  4.9  2.06 123
28 Mon         08:02:08.6 -01:26:39  6.7  0.29 124
PPM 177240     08:02:24.9 -01:43:40  9.7  0.24 124
PPM 177230     08:01:02.9 -01:32:04 10.3  0.18 124
32532          08:01:28.2 -01:40:51 15.2       124
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 20.0 km RECON observability=1.0 and success probability=0.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:45:24 -35.9 Dark Down 33.6 144.4 Up 04:40:48 - 04:50:01 3652
Tonasket 04:45:25 -35.9 Dark Down 33.8 144.4 Up 04:40:48 - 04:50:01 3633
Okanogan 04:45:25 -36.0 Dark Down 34.0 144.1 Up 04:40:49 - 04:50:02 3602
Brewster 04:45:26 -35.9 Dark Down 34.1 143.7 Up 04:40:50 - 04:50:03 3575
Manson/Chelan 04:45:27 -35.8 Dark Down 34.1 143.2 Up 04:40:50 - 04:50:03 3549
Entiat 04:45:27 -35.8 Dark Down 34.3 143.1 Up 04:40:51 - 04:50:04 3529
Wenatchee 04:45:28 -35.8 Dark Down 34.5 142.9 Up 04:40:51 - 04:50:04 3505
Ellensburg 04:45:29 -35.8 Dark Down 34.7 142.5 Up 04:40:52 - 04:50:05 3465
Pasco 04:45:25 -37.0 Dark Down 35.9 143.7 Up 04:40:48 - 04:50:01 3439
Yakima 04:45:29 -35.9 Dark Down 35.0 142.3 Up 04:40:52 - 04:50:05 3431
PNWRO 04:45:24 -37.2 Dark Down 36.2 143.9 Up 04:40:48 - 04:50:01 3425
Toppenish/White Swan 04:45:29 -36.1 Dark Down 35.2 142.4 Up 04:40:52 - 04:50:05 3417
George/Umatilla 04:45:26 -36.9 Dark Down 36.0 143.3 Up 04:40:49 - 04:50:02 3406
Goldendale 04:45:30 -36.0 Dark Down 35.5 141.7 Up 04:40:54 - 04:50:07 3359
The Dalles 04:45:31 -35.8 Dark Down 35.5 141.2 Up 04:40:54 - 04:50:07 3330
Niwot 04:44:40 -48.6 Dark Down 46.1 158.2 Up 04:40:03 - 04:49:16 3325
Maupin 04:45:30 -36.0 Dark Down 35.9 141.1 Up 04:40:54 - 04:50:07 3298
Madras/Culver 04:45:31 -36.1 Dark Down 36.3 140.8 Up 04:40:55 - 04:50:08 3250
Redmond 04:45:32 -36.2 Dark Down 36.6 140.6 Up 04:40:55 - 04:50:08 3217
Sisters 04:45:33 -35.9 Dark Down 36.4 140.1 Up 04:40:56 - 04:50:09 3209
Bend 04:45:32 -36.2 Dark Down 36.7 140.3 Up 04:40:56 - 04:50:09 3195
Oregon Observatory 04:45:33 -36.1 Dark Down 36.7 140.1 Up 04:40:56 - 04:50:09 3177
La Pine/Gilchrist 04:45:33 -36.1 Dark Down 36.9 139.9 Up 04:40:56 - 04:50:09 3157
North Lake 04:45:31 -36.7 Dark Down 37.5 140.4 Up 04:40:55 - 04:50:08 3135
Paisley 04:45:30 -37.1 Dark Down 38.1 140.5 Up 04:40:54 - 04:50:07 3097
Lakeview 04:45:30 -37.3 Dark Down 38.5 140.5 Up 04:40:53 - 04:50:06 3057
Chiloquin 04:45:34 -36.2 Dark Down 37.5 139.0 Up 04:40:58 - 04:50:11 3050
Klamath Falls 04:45:34 -36.3 Dark Down 37.8 138.9 Up 04:40:57 - 04:50:10 3021
Tulelake 04:45:33 -36.6 Dark Down 38.2 139.1 Up 04:40:57 - 04:50:10 3006
Cedarville 04:45:29 -37.6 Dark Down 39.1 140.3 Up 04:40:52 - 04:50:05 3004
Fall River/Burney 04:45:33 -36.9 Dark Down 38.9 138.7 Up 04:40:57 - 04:50:10 2926
Susanville 04:45:31 -37.6 Dark Down 39.8 139.2 Up 04:40:54 - 04:50:07 2891
Gimple 04:45:32 -37.5 Dark Down 39.9 138.8 Up 04:40:55 - 04:50:08 2859
Greenville 04:45:32 -37.4 Dark Down 39.8 138.7 Up 04:40:55 - 04:50:08 2857
Portola 04:45:30 -37.8 Dark Down 40.3 139.1 Up 04:40:54 - 04:50:07 2841
Quincy 04:45:31 -37.5 Dark Down 40.0 138.6 Up 04:40:55 - 04:50:08 2839
Reno 04:45:29 -38.4 Dark Down 40.8 139.6 Up 04:40:52 - 04:50:05 2836
Yerington 04:45:26 -39.0 Dark Down 41.6 140.1 Up 04:40:50 - 04:50:03 2804
Carson City 04:45:29 -38.5 Dark Down 41.1 139.5 Up 04:40:52 - 04:50:05 2804
Gardnerville 04:45:29 -38.6 Dark Down 41.3 139.4 Up 04:40:52 - 04:50:05 2783
Hawthorne 04:45:25 -39.5 Dark Down 42.2 140.4 Up 04:40:48 - 04:50:01 2778
Tonopah 04:45:20 -40.7 Dark Down 43.2 141.8 Up 04:40:43 - 04:49:56 2777
Lee Vining 04:45:26 -39.3 Dark Down 42.4 139.5 Up 04:40:50 - 04:50:03 2712
Indian Springs 04:45:15 -42.2 Dark Down 45.2 142.8 Up 04:40:38 - 04:49:51 2688
Beatty 04:45:19 -41.3 Dark Down 44.4 141.7 Up 04:40:42 - 04:49:55 2685
Bishop 04:45:24 -39.9 Dark Down 43.2 140.0 Up 04:40:47 - 04:50:00 2678
Henderson 04:45:12 -42.9 Dark Down 45.9 143.3 Up 04:40:36 - 04:49:49 2661
Patrick 04:45:09 -43.9 Dark Down 46.9 144.3 Up 04:40:32 - 04:49:45 2638
DCO 04:45:05 -44.5 Dark Down 47.5 145.0 Up 04:40:29 - 04:49:42 2633
Lone Pine 04:45:23 -40.4 Dark Down 44.0 139.9 Up 04:40:46 - 04:49:59 2618
Kingman/Dolan Springs 04:45:09 -43.8 Dark Down 47.0 143.9 Up 04:40:32 - 04:49:45 2612
Searchlight/Boulder City 04:45:12 -43.1 Dark Down 46.4 143.0 Up 04:40:36 - 04:49:49 2610
Laughlin/Bullhead City 04:45:10 -43.4 Dark Down 46.8 143.3 Up 04:40:34 - 04:49:47 2593
Mohave Valley 04:45:10 -43.5 Dark Down 47.0 143.1 Up 04:40:34 - 04:49:47 2568
Lake Havasu City 04:45:10 -43.8 Dark Down 47.5 143.1 Up 04:40:33 - 04:49:46 2539
Parker 04:45:09 -43.9 Dark Down 47.8 142.9 Up 04:40:33 - 04:49:46 2507
Blythe 04:45:10 -43.7 Dark Down 48.0 142.2 Up 04:40:33 - 04:49:46 2448
CPSLO 04:45:31 -38.6 Dark Down 43.5 136.1 Up 04:40:54 - 04:50:07 2418
Idyllwild 04:45:18 -42.0 Dark Down 46.8 139.7 Up 04:40:41 - 04:49:54 2392
Calipatria 04:45:13 -43.1 Dark Down 47.9 140.7 Up 04:40:37 - 04:49:50 2372
Wildwood 04:45:24 -40.4 Dark Down 45.6 137.7 Up 04:40:47 - 04:50:00 2366
Yuma 04:45:09 -43.9 Dark Down 48.7 141.5 Up 04:40:33 - 04:49:46 2360

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 32532, (2018/02/09 04:43UT)
Object            RA         Dec     mag  sep  mel
Sirius         06:45:08.2 -16:43:19 -1.5 23.92 132
15Rho Pup      08:07:32.5 -24:18:15  2.8 22.74 112
27 Mon         07:59:44.1 -03:40:47  4.9  2.06 123
28 Mon         08:01:13.4 -01:23:35  6.7  0.29 124
PPM 177240     08:01:29.8 -01:40:36  9.7  0.24 124
PPM 177230     08:00:07.8 -01:29:01 10.3  0.18 124
32532          08:00:33.1 -01:37:48 15.2       124
Positions are for J2000

Event circumstances last updated at 2017/05/17 18:01:00 UT

Marc W. Buie, Southwest Research Institute

RECON