RECON: TNO occultation with 5145

Event between (5145) Pholus and star UC4-402-073169 with event index number of 68801

Geocentric closest approach at 2017/03/28 10:26:18 UTC

J2000 position of star is 17:57:44.8 -09:39:06
Equinox of date position of star is 17:58:40.6 -09:39:08
Stellar brightness R=16.5
Star is 103 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 27.3 AU from the Sun and 27.1 AU from the Earth.
The TNO is moving 5.6 km/sec on the sky relative to the star, or, 1.0 arcsec/hr.
The 1-sigma error in the time of the event is 326 seconds.
The 1-sigma cross-track error in the shadow position is 3829 km.
The sky-plane scale is 19663.4 km/arcsec.

The TNO has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 41.0 sec chord
Diameter=93.5 km assuming a 30% albedo -- 16.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 5145, (2017/03/28 10:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:28.0 -26:28:08  0.9 26.79 122
35Eta Oph      17:11:22.1 -15:44:42  2.6 13.05 114
64Nu Oph       17:59:58.6 -09:46:28  3.3  0.34 103
PPM 233708     17:54:08.8 -10:22:29  8.1  1.33 104
PPM 201243     17:58:54.8 -09:47:50  9.6  0.15 103
5145           17:58:41.7 -09:39:08 16.5       103
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 2.8 sigma about the mid-time.
The median site spacing is 7.9 km RECON observability=1.0 and success probability=9.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Niwot 10:40:52 -24.6 Dark Down 33.8 145.7 Up 10:25:52 - 10:55:52 -1473
Oroville 10:42:22 -27.5 Dark Down 20.7 134.9 Low 10:27:22 - 10:57:22 -1966
Tonasket 10:42:18 -27.7 Dark Down 20.8 134.8 Low 10:27:18 - 10:57:18 -1980
Okanogan 10:42:17 -28.0 Dark Down 21.0 134.6 Low 10:27:17 - 10:57:17 -2009
Brewster 10:42:12 -28.3 Dark Down 21.1 134.3 Low 10:27:12 - 10:57:12 -2036
Manson/Chelan 10:42:08 -28.6 Dark Down 21.0 133.9 Low 10:27:08 - 10:57:08 -2069
Entiat 10:42:06 -28.8 Dark Down 21.2 133.8 Low 10:27:06 - 10:57:06 -2086
Pasco 10:41:50 -29.2 Dark Down 22.6 134.3 Low 10:26:50 - 10:56:50 -2106
Wenatchee 10:42:04 -29.0 Dark Down 21.3 133.6 Low 10:27:04 - 10:57:04 -2106
PNWRO 10:41:50 -29.3 Dark Down 22.9 134.4 Low 10:26:50 - 10:56:50 -2107
George/Umatilla 10:41:50 -29.6 Dark Down 22.8 134.0 Low 10:26:50 - 10:56:50 -2138
Ellensburg 10:41:59 -29.4 Dark Down 21.4 133.3 Low 10:26:59 - 10:56:59 -2143
Yakima 10:41:53 -29.7 Dark Down 21.7 133.1 Low 10:26:53 - 10:56:53 -2169
Toppenish/White Swan 10:41:50 -29.8 Dark Down 21.9 133.2 Low 10:26:50 - 10:56:50 -2172
Goldendale 10:41:45 -30.4 Dark Down 22.1 132.6 Low 10:26:45 - 10:56:45 -2229
The Dalles 10:41:42 -30.8 Dark Down 22.0 132.2 Low 10:26:42 - 10:56:42 -2263
DCO 10:39:42 -32.7 Dark Down 33.4 135.2 Up 10:24:42 - 10:54:42 -2280
Maupin 10:41:38 -31.0 Dark Down 22.4 132.1 Low 10:26:38 - 10:56:38 -2281
Madras/Culver 10:41:31 -31.4 Dark Down 22.7 131.9 Low 10:26:31 - 10:56:31 -2316
Patrick 10:39:45 -33.0 Dark Down 32.8 134.7 Up 10:24:45 - 10:54:45 -2318
Redmond 10:41:25 -31.7 Dark Down 22.9 131.7 Low 10:26:25 - 10:56:25 -2340
Kingman/Dolan Springs 10:39:43 -33.3 Dark Down 32.8 134.4 Up 10:24:43 - 10:54:43 -2342
Bend 10:41:26 -31.9 Dark Down 23.0 131.5 Low 10:26:26 - 10:56:26 -2361
Sisters 10:41:29 -31.9 Dark Down 22.7 131.4 Low 10:26:29 - 10:56:29 -2362
Henderson 10:39:51 -33.4 Dark Down 31.7 133.9 Up 10:24:51 - 10:54:51 -2370
Oregon Observatory 10:41:22 -32.1 Dark Down 23.0 131.4 Low 10:26:22 - 10:56:22 -2378
Laughlin/Bullhead City 10:39:40 -33.7 Dark Down 32.6 133.9 Up 10:24:40 - 10:54:40 -2381
North Lake 10:41:16 -32.3 Dark Down 23.7 131.6 Low 10:26:16 - 10:56:16 -2384
Lake Havasu City 10:39:33 -33.9 Dark Down 33.2 133.8 Up 10:24:33 - 10:54:33 -2392
Searchlight/Boulder City 10:39:42 -33.7 Dark Down 32.1 133.7 Up 10:24:42 - 10:54:42 -2392
Mohave Valley 10:39:40 -33.8 Dark Down 32.7 133.8 Up 10:24:40 - 10:54:40 -2392
Paisley 10:41:10 -32.5 Dark Down 24.2 131.7 Low 10:26:10 - 10:56:10 -2394
La Pine/Gilchrist 10:41:21 -32.3 Dark Down 23.1 131.2 Low 10:26:21 - 10:56:21 -2394
Indian Springs 10:39:56 -33.6 Dark Down 31.0 133.5 Up 10:24:56 - 10:54:56 -2394
Parker 10:39:26 -34.1 Dark Down 33.4 133.6 Up 10:24:26 - 10:54:26 -2405
Lakeview 10:41:03 -32.7 Dark Down 24.7 131.7 Low 10:26:03 - 10:56:03 -2411
Tonopah 10:40:15 -33.6 Dark Down 29.1 132.8 Low 10:25:15 - 10:55:15 -2428
Cedarville 10:40:55 -33.1 Dark Down 25.2 131.6 Low 10:25:55 - 10:55:55 -2436
Blythe 10:39:19 -34.6 Dark Down 33.6 133.0 Up 10:24:19 - 10:54:19 -2451
Beatty 10:39:58 -34.1 Dark Down 30.1 132.7 Up 10:24:58 - 10:54:58 -2454
Chiloquin 10:41:08 -33.3 Dark Down 23.6 130.5 Low 10:26:08 - 10:56:08 -2479
Tulelake 10:41:01 -33.5 Dark Down 24.2 130.6 Low 10:26:01 - 10:56:01 -2491
Yuma 10:39:05 -35.2 Dark Down 34.1 132.5 Up 10:24:05 - 10:54:05 -2494
Klamath Falls 10:41:03 -33.5 Dark Down 23.8 130.4 Low 10:26:03 - 10:56:03 -2494
Hawthorne 10:40:19 -34.2 Dark Down 28.0 131.7 Low 10:25:19 - 10:55:19 -2498
Yerington 10:40:26 -34.2 Dark Down 27.4 131.5 Low 10:25:26 - 10:55:26 -2509
Reno 10:40:31 -34.3 Dark Down 26.6 131.1 Low 10:25:31 - 10:55:31 -2522
Susanville 10:40:47 -34.1 Dark Down 25.6 130.7 Low 10:25:47 - 10:55:47 -2527
Fall River/Burney 10:40:48 -34.1 Dark Down 24.8 130.3 Low 10:25:48 - 10:55:48 -2537
Carson City 10:40:27 -34.5 Dark Down 26.9 131.0 Low 10:25:27 - 10:55:27 -2539
Calipatria 10:39:12 -35.5 Dark Down 33.3 131.9 Up 10:24:12 - 10:54:12 -2541
Bishop 10:40:05 -34.8 Dark Down 28.9 131.4 Low 10:25:05 - 10:55:05 -2542
Portola 10:40:36 -34.4 Dark Down 26.1 130.7 Low 10:25:36 - 10:55:36 -2548
Gardnerville 10:40:24 -34.6 Dark Down 27.1 130.9 Low 10:25:24 - 10:55:24 -2549
Gimple 10:40:37 -34.5 Dark Down 25.7 130.4 Low 10:25:37 - 10:55:37 -2555
Lone Pine 10:39:57 -35.1 Dark Down 29.5 131.4 Low 10:24:57 - 10:54:57 -2557
Lee Vining 10:40:15 -34.9 Dark Down 28.1 131.1 Low 10:25:15 - 10:55:15 -2560
Greenville 10:40:37 -34.5 Dark Down 25.6 130.4 Low 10:25:37 - 10:55:37 -2560
Quincy 10:40:35 -34.6 Dark Down 25.7 130.3 Low 10:25:35 - 10:55:35 -2571
Idyllwild 10:39:17 -36.0 Dark Down 32.2 131.1 Up 10:24:17 - 10:54:17 -2600
Wildwood 10:39:22 -37.1 Dark Down 30.7 129.7 Up 10:24:22 - 10:54:22 -2715
CPSLO 10:39:36 -37.6 Dark Down 28.7 128.5 Low 10:24:36 - 10:54:36 -2795

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 5145, (2017/03/28 10:26UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 26.79 122
35Eta Oph      17:10:22.7 -15:43:29  2.6 13.05 114
64Nu Oph       17:59:01.6 -09:46:27  3.3  0.34 103
PPM 233708     17:53:11.6 -10:22:19  8.1  1.33 104
PPM 201243     17:57:57.8 -09:47:48  9.6  0.15 103
5145           17:57:44.8 -09:39:06 16.5       103
Positions are for J2000

Event circumstances last updated at 2016/11/30 19:04:30 UT

Marc W. Buie, Southwest Research Institute

RECON