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 08:01:27.6 -01:40:49
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 62 seconds.
The 1-sigma cross-track error in the shadow position is 709 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         06:45:56.7 -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 19.7 km RECON observability=1.0 and success probability=0.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 04:45:26 -35.9 Dark Down 33.6 144.5 Up 04:39:44 - 04:51:08 3645
Tonasket 04:45:26 -35.9 Dark Down 33.8 144.4 Up 04:39:44 - 04:51:08 3626
Okanogan 04:45:26 -36.0 Dark Down 34.0 144.1 Up 04:39:44 - 04:51:08 3595
Brewster 04:45:27 -35.9 Dark Down 34.1 143.7 Up 04:39:45 - 04:51:09 3568
Manson/Chelan 04:45:28 -35.8 Dark Down 34.1 143.3 Up 04:39:46 - 04:51:10 3541
Entiat 04:45:28 -35.8 Dark Down 34.3 143.1 Up 04:39:46 - 04:51:10 3521
Wenatchee 04:45:29 -35.8 Dark Down 34.5 142.9 Up 04:39:47 - 04:51:11 3498
Ellensburg 04:45:30 -35.8 Dark Down 34.7 142.5 Up 04:39:48 - 04:51:12 3458
Pasco 04:45:26 -37.0 Dark Down 35.9 143.7 Up 04:39:44 - 04:51:08 3432
Yakima 04:45:30 -35.9 Dark Down 35.0 142.3 Up 04:39:48 - 04:51:12 3423
PNWRO 04:45:25 -37.2 Dark Down 36.2 143.9 Up 04:39:43 - 04:51:07 3417
Toppenish/White Swan 04:45:30 -36.1 Dark Down 35.2 142.4 Up 04:39:48 - 04:51:12 3409
George/Umatilla 04:45:27 -36.9 Dark Down 36.0 143.3 Up 04:39:45 - 04:51:09 3398
Goldendale 04:45:31 -36.0 Dark Down 35.5 141.7 Up 04:39:49 - 04:51:13 3351
The Dalles 04:45:33 -35.8 Dark Down 35.5 141.2 Up 04:39:51 - 04:51:15 3323
Niwot 04:44:41 -48.6 Dark Down 46.1 158.2 Up 04:38:59 - 04:50:23 3315
Maupin 04:45:32 -36.0 Dark Down 35.9 141.1 Up 04:39:50 - 04:51:14 3290
Madras/Culver 04:45:32 -36.1 Dark Down 36.3 140.8 Up 04:39:50 - 04:51:14 3241
Redmond 04:45:33 -36.2 Dark Down 36.6 140.6 Up 04:39:51 - 04:51:15 3209
Sisters 04:45:34 -35.9 Dark Down 36.4 140.1 Up 04:39:52 - 04:51:16 3201
Bend 04:45:33 -36.2 Dark Down 36.7 140.3 Up 04:39:51 - 04:51:15 3187
Oregon Observatory 04:45:34 -36.1 Dark Down 36.7 140.1 Up 04:39:52 - 04:51:16 3168
La Pine/Gilchrist 04:45:34 -36.1 Dark Down 36.9 139.9 Up 04:39:52 - 04:51:16 3149
North Lake 04:45:32 -36.7 Dark Down 37.5 140.4 Up 04:39:50 - 04:51:14 3127
Paisley 04:45:31 -37.1 Dark Down 38.1 140.5 Up 04:39:49 - 04:51:13 3088
Lakeview 04:45:31 -37.3 Dark Down 38.5 140.5 Up 04:39:49 - 04:51:13 3048
Chiloquin 04:45:35 -36.2 Dark Down 37.5 139.0 Up 04:39:53 - 04:51:17 3041
Klamath Falls 04:45:35 -36.3 Dark Down 37.8 138.9 Up 04:39:53 - 04:51:17 3013
Tulelake 04:45:34 -36.6 Dark Down 38.2 139.1 Up 04:39:52 - 04:51:16 2997
Cedarville 04:45:30 -37.6 Dark Down 39.1 140.3 Up 04:39:48 - 04:51:12 2995
Fall River/Burney 04:45:34 -36.9 Dark Down 38.9 138.7 Up 04:39:52 - 04:51:16 2918
Susanville 04:45:32 -37.6 Dark Down 39.8 139.2 Up 04:39:50 - 04:51:14 2882
Gimple 04:45:33 -37.5 Dark Down 39.9 138.8 Up 04:39:51 - 04:51:15 2850
Greenville 04:45:33 -37.4 Dark Down 39.8 138.7 Up 04:39:51 - 04:51:15 2848
Portola 04:45:31 -37.8 Dark Down 40.3 139.1 Up 04:39:49 - 04:51:13 2832
Quincy 04:45:33 -37.5 Dark Down 40.0 138.6 Up 04:39:51 - 04:51:15 2830
Reno 04:45:30 -38.4 Dark Down 40.8 139.7 Up 04:39:48 - 04:51:12 2827
Yerington 04:45:27 -39.0 Dark Down 41.6 140.1 Up 04:39:45 - 04:51:09 2795
Carson City 04:45:30 -38.5 Dark Down 41.1 139.5 Up 04:39:48 - 04:51:12 2795
Gardnerville 04:45:29 -38.6 Dark Down 41.3 139.4 Up 04:39:47 - 04:51:11 2774
Hawthorne 04:45:26 -39.5 Dark Down 42.2 140.4 Up 04:39:44 - 04:51:08 2768
Tonopah 04:45:21 -40.7 Dark Down 43.2 141.8 Up 04:39:39 - 04:51:03 2768
Lee Vining 04:45:27 -39.3 Dark Down 42.4 139.5 Up 04:39:45 - 04:51:09 2702
Indian Springs 04:45:16 -42.2 Dark Down 45.2 142.8 Up 04:39:34 - 04:50:58 2679
Beatty 04:45:19 -41.3 Dark Down 44.4 141.7 Up 04:39:37 - 04:51:01 2676
Bishop 04:45:25 -40.0 Dark Down 43.2 140.0 Up 04:39:43 - 04:51:07 2669
Henderson 04:45:13 -42.9 Dark Down 45.9 143.3 Up 04:39:31 - 04:50:55 2651
Patrick 04:45:09 -43.9 Dark Down 46.9 144.3 Up 04:39:27 - 04:50:51 2629
DCO 04:45:06 -44.5 Dark Down 47.5 145.0 Up 04:39:24 - 04:50:48 2623
Lone Pine 04:45:24 -40.4 Dark Down 44.0 139.9 Up 04:39:42 - 04:51:06 2609
Kingman/Dolan Springs 04:45:10 -43.8 Dark Down 47.0 143.9 Up 04:39:28 - 04:50:52 2602
Searchlight/Boulder City 04:45:13 -43.1 Dark Down 46.4 143.0 Up 04:39:31 - 04:50:55 2600
Laughlin/Bullhead City 04:45:12 -43.4 Dark Down 46.8 143.3 Up 04:39:30 - 04:50:54 2584
Mohave Valley 04:45:11 -43.5 Dark Down 47.0 143.1 Up 04:39:29 - 04:50:53 2559
Lake Havasu City 04:45:10 -43.8 Dark Down 47.5 143.1 Up 04:39:28 - 04:50:52 2529
Parker 04:45:10 -43.9 Dark Down 47.8 143.0 Up 04:39:28 - 04:50:52 2498
Blythe 04:45:11 -43.8 Dark Down 48.0 142.2 Up 04:39:29 - 04:50:53 2439
CPSLO 04:45:32 -38.6 Dark Down 43.5 136.1 Up 04:39:50 - 04:51:14 2409
Idyllwild 04:45:18 -42.0 Dark Down 46.8 139.7 Up 04:39:36 - 04:51:00 2382
Calipatria 04:45:14 -43.1 Dark Down 47.9 140.7 Up 04:39:32 - 04:50:56 2363
Wildwood 04:45:25 -40.4 Dark Down 45.6 137.7 Up 04:39:43 - 04:51:07 2357
Yuma 04:45:11 -43.9 Dark Down 48.7 141.5 Up 04:39:29 - 04:50:53 2351

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 -16:43:20 -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 2017/12/02 17:15:26 UT

Marc W. Buie, Southwest Research Institute

RECON