RECON: TNO occultation with 05GF187

Event between 05GF187 and star UC4-353-085029 with event index number of 195516

Geocentric closest approach at 2019/04/22 10:26:40 UTC

J2000 position of star is 16:58:50.3 -19:24:26
Equinox of date position of star is 16:59:53.6 -19:26:00
Stellar brightness R=12.3, use SENSEUP=16
Star is 5 degrees from the moon. Moon is 89% illuminated.
TNO apparent brightness V=22.7

[RECON map]
TNO is 29.5 AU from the Sun and 28.8 AU from the Earth.
The TNO is moving 14.9 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 501 seconds.
The 1-sigma cross-track error in the shadow position is 3318 km.
The sky-plane scale is 20858.2 km/arcsec.

The TNO has an absolute magnitude Hv=7.9
Diameter=157.8 km assuming a 5% albedo -- 10.6 sec chord
Diameter=64.4 km assuming a 30% albedo -- 4.3 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 05GF187, (2019/04/22 10:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.7 -26:28:24  0.9  9.76   8
35Eta Oph      17:11:29.2 -15:44:51  2.6  4.60   9
PPM 232367     16:58:12.1 -19:34:09  6.1  0.44   5
PPM 232457     17:01:26.9 -19:11:45  8.3  0.42   6
PPM 232411     16:59:46.0 -19:26:02  8.9  0.05   5
05GF187        16:59:58.5 -19:26:07 12.3         6
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 1.8 sigma about the mid-time.
The median site spacing is 11.6 km RECON observability=1.0 and success probability=6.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 10:28:19 -20.3 Dark Up 21.4 173.0 Low 10:13:19 - 10:43:19 2806
Tonasket 10:28:19 -20.5 Dark Up 21.6 173.0 Low 10:13:19 - 10:43:19 2796
Okanogan 10:28:20 -20.8 Dark Up 21.9 172.9 Low 10:13:20 - 10:43:20 2779
Brewster 10:28:22 -21.1 Dark Up 22.2 172.7 Low 10:13:22 - 10:43:22 2764
Manson/Chelan 10:28:24 -21.4 Dark Up 22.4 172.3 Low 10:13:24 - 10:43:24 2750
Entiat 10:28:24 -21.6 Dark Up 22.6 172.2 Low 10:13:24 - 10:43:24 2739
Wenatchee 10:28:24 -21.9 Dark Up 22.8 172.1 Low 10:13:24 - 10:43:24 2726
Ellensburg 10:28:25 -22.3 Dark Up 23.2 171.8 Low 10:13:25 - 10:43:25 2703
Pasco 10:28:18 -22.2 Dark Up 24.1 173.2 Low 10:13:18 - 10:43:18 2691
Yakima 10:28:26 -22.6 Dark Up 23.6 171.8 Low 10:13:26 - 10:43:26 2684
PNWRO 10:28:17 -22.3 Dark Up 24.3 173.4 Low 10:13:17 - 10:43:17 2683
Toppenish/White Swan 10:28:25 -22.7 Dark Up 23.8 172.0 Low 10:13:25 - 10:43:25 2677
George/Umatilla 10:28:19 -22.6 Dark Up 24.4 173.0 Low 10:13:19 - 10:43:19 2672
Goldendale 10:28:26 -23.3 Dark Up 24.3 171.5 Low 10:13:26 - 10:43:26 2644
The Dalles 10:28:29 -23.6 Dark Up 24.5 171.1 Low 10:13:29 - 10:43:29 2627
Maupin 10:28:28 -23.9 Dark Up 25.0 171.2 Low 10:13:28 - 10:43:28 2608
Madras/Culver 10:28:29 -24.3 Dark Up 25.5 171.1 Low 10:13:29 - 10:43:29 2580
Niwot 10:27:02 -19.0 Dark Up 30.1 187.7 Up 10:12:02 - 10:42:02 2563
Redmond 10:28:29 -24.6 Dark Up 25.8 171.0 Low 10:13:29 - 10:43:29 2561
Sisters 10:28:31 -24.8 Dark Up 25.8 170.6 Low 10:13:31 - 10:43:31 2556
Bend 10:28:30 -24.9 Dark Up 26.0 170.9 Low 10:13:30 - 10:43:30 2548
Oregon Observatory 10:28:31 -25.1 Dark Up 26.2 170.7 Low 10:13:31 - 10:43:31 2537
La Pine/Gilchrist 10:28:31 -25.2 Dark Up 26.4 170.6 Low 10:13:31 - 10:43:31 2525
North Lake 10:28:28 -25.3 Dark Up 26.9 171.2 Low 10:13:28 - 10:43:28 2513
Paisley 10:28:26 -25.6 Dark Up 27.5 171.5 Low 10:13:26 - 10:43:26 2490
Lakeview 10:28:26 -25.8 Dark Up 28.0 171.7 Low 10:13:26 - 10:43:26 2466
Chiloquin 10:28:33 -26.3 Dark Up 27.4 170.2 Low 10:13:33 - 10:43:33 2460
Klamath Falls 10:28:33 -26.5 Dark Up 27.8 170.2 Low 10:13:33 - 10:43:33 2443
Tulelake 10:28:31 -26.6 Dark Up 28.1 170.5 Low 10:13:31 - 10:43:31 2434
Cedarville 10:28:24 -26.3 Dark Up 28.7 171.8 Low 10:13:24 - 10:43:24 2433
Fall River/Burney 10:28:31 -27.2 Dark Up 29.0 170.5 Low 10:13:31 - 10:43:31 2385
Susanville 10:28:28 -27.3 Dark Up 29.7 171.3 Low 10:13:28 - 10:43:28 2362
Gimple 10:28:28 -27.6 Dark Up 30.0 171.0 Low 10:13:28 - 10:43:28 2343
Greenville 10:28:29 -27.7 Dark Up 29.9 170.9 Low 10:13:29 - 10:43:29 2341
Portola 10:28:26 -27.7 Dark Up 30.3 171.4 Up 10:13:26 - 10:43:26 2331
Quincy 10:28:29 -27.8 Dark Up 30.1 170.9 Up 10:13:29 - 10:43:29 2330
Reno 10:28:23 -27.6 Dark Up 30.7 172.1 Up 10:13:23 - 10:43:23 2327
Carson City 10:28:22 -27.8 Dark Up 31.0 172.1 Up 10:13:22 - 10:43:22 2306
Yerington 10:28:19 -27.6 Dark Up 31.3 172.7 Up 10:13:19 - 10:43:19 2306
Gardnerville 10:28:22 -28.0 Dark Up 31.3 172.1 Up 10:13:22 - 10:43:22 2293
Hawthorne 10:28:16 -27.7 Dark Up 31.8 173.3 Up 10:13:16 - 10:43:16 2287
Tonopah 10:28:08 -27.3 Dark Up 32.4 174.8 Up 10:13:08 - 10:43:08 2283
Lee Vining 10:28:18 -28.4 Dark Up 32.3 172.7 Up 10:13:18 - 10:43:18 2245
Bishop 10:28:14 -28.4 Dark Up 33.0 173.4 Up 10:13:14 - 10:43:14 2221
Beatty 10:28:06 -27.8 Dark Up 33.5 175.2 Up 10:13:06 - 10:43:06 2221
Indian Springs 10:27:59 -27.4 Dark Up 33.9 176.4 Up 10:12:59 - 10:42:59 2218
Henderson 10:27:55 -27.4 Dark Up 34.5 177.1 Up 10:12:55 - 10:42:55 2196
Lone Pine 10:28:13 -28.8 Dark Up 33.7 173.7 Up 10:13:13 - 10:43:13 2180
Patrick 10:27:48 -27.1 Dark Up 35.2 178.4 Up 10:12:48 - 10:42:48 2174
DCO 10:27:43 -26.9 Dark Up 35.5 179.1 Up 10:12:43 - 10:42:43 2165
Searchlight/Boulder City 10:27:54 -27.7 Dark Up 35.1 177.2 Up 10:12:54 - 10:42:54 2161
Kingman/Dolan Springs 10:27:49 -27.4 Dark Up 35.4 178.1 Up 10:12:49 - 10:42:49 2157
Laughlin/Bullhead City 10:27:52 -27.7 Dark Up 35.4 177.6 Up 10:12:52 - 10:42:52 2147
Mohave Valley 10:27:51 -27.9 Dark Up 35.7 177.5 Up 10:12:51 - 10:42:51 2130
Lake Havasu City 10:27:50 -28.0 Dark Up 36.1 177.8 Up 10:12:50 - 10:42:50 2108
Parker 10:27:49 -28.2 Dark Up 36.4 177.8 Up 10:12:49 - 10:42:49 2086
CPSLO 10:28:27 -31.1 Dark Up 34.8 170.7 Up 10:13:27 - 10:43:27 2050
Blythe 10:27:51 -28.8 Dark Up 36.9 177.5 Up 10:12:51 - 10:42:51 2046
Idyllwild 10:28:03 -30.0 Dark Up 36.7 175.0 Up 10:13:03 - 10:43:03 2018
Wildwood 10:28:15 -30.8 Dark Up 36.2 172.9 Up 10:13:15 - 10:43:15 2009
Calipatria 10:27:57 -29.7 Dark Up 37.4 176.4 Up 10:12:57 - 10:42:57 1998
Yuma 10:27:51 -29.4 Dark Up 37.9 177.4 Up 10:12:51 - 10:42:51 1984

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 05GF187, (2019/04/22 10:27UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.76   8
35Eta Oph      17:10:22.7 -15:43:29  2.6  4.60   9
PPM 232367     16:57:03.9 -19:32:25  6.1  0.44   5
PPM 232457     17:00:18.9 -19:10:06  8.3  0.42   6
PPM 232411     16:58:37.8 -19:24:20  8.9  0.05   5
05GF187        16:58:50.3 -19:24:26 12.3         5
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:52:04 UT

Marc W. Buie, Southwest Research Institute

RECON