RECON: TNO occultation with 38628

Event between (38628) Huya and star UC4-420-066465 with event index number of 204277

Geocentric closest approach at 2019/07/08 09:08:53 UTC

J2000 position of star is 16:31:56.9 -06:04:25
Equinox of date position of star is 16:32:53.3 -06:06:37
Stellar brightness R=13.4, use SENSEUP=32
Star is 65 degrees from the moon. Moon is 38% illuminated.
TNO apparent brightness V=19.5

[RECON map]
TNO is 28.7 AU from the Sun and 27.9 AU from the Earth.
The TNO is moving 17.2 km/sec on the sky relative to the star, or, 3.1 arcsec/hr.
The 1-sigma error in the time of the event is 97 seconds.
The 1-sigma cross-track error in the shadow position is 1023 km.
The sky-plane scale is 20229.6 km/arcsec.

The TNO has an absolute magnitude Hv=4.8
Diameter=660.7 km assuming a 5% albedo -- 38.3 sec chord
Diameter=269.7 km assuming a 30% albedo -- 15.6 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 38628, (2019/07/08 09:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.4 -26:28:25  0.9 20.37  69
13Zet Oph      16:38:14.1 -10:36:19  2.6  4.67  67
PPM 199844     16:39:04.4 -06:34:34  6.4  1.58  67
PPM 199789     16:35:30.9 -06:10:32  8.4  0.63  66
PPM 199743     16:33:02.1 -06:12:18  9.5  0.09  65
38628          16:32:59.5 -06:06:51 13.4        65
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 23.5 km RECON observability=0.7 and success probability=17.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:05:03 -17.2 AT Down 17.2 238.4 Really Low 08:56:26 - 09:13:39 2523
Tonasket 09:05:02 -17.5 AT Down 17.3 238.4 Really Low 08:56:26 - 09:13:39 2505
Okanogan 09:05:01 -17.8 AT Down 17.6 238.4 Really Low 08:56:25 - 09:13:38 2481
Brewster 09:05:01 -18.1 Dark Down 17.9 238.3 Really Low 08:56:24 - 09:13:37 2463
Manson/Chelan 09:05:01 -18.4 Dark Down 18.2 238.0 Really Low 08:56:25 - 09:13:38 2451
Entiat 09:05:01 -18.6 Dark Down 18.3 238.0 Really Low 08:56:24 - 09:13:37 2435
Wenatchee 09:05:00 -18.9 Dark Down 18.5 238.0 Really Low 08:56:24 - 09:13:37 2417
Ellensburg 09:05:00 -19.3 Dark Down 18.9 237.9 Really Low 08:56:23 - 09:13:36 2388
Yakima 09:04:57 -19.7 Dark Down 19.1 238.0 Really Low 08:56:21 - 09:13:34 2357
Toppenish/White Swan 09:04:57 -19.9 Dark Down 19.1 238.2 Really Low 08:56:20 - 09:13:33 2338
Pasco 09:04:53 -19.8 Dark Down 18.5 239.3 Really Low 08:56:17 - 09:13:30 2313
Goldendale 09:04:56 -20.5 Dark Down 19.7 238.0 Really Low 08:56:19 - 09:13:32 2300
PNWRO 09:04:52 -20.0 Dark Down 18.4 239.6 Really Low 08:56:15 - 09:13:28 2292
George/Umatilla 09:04:53 -20.1 Dark Down 18.8 239.3 Really Low 08:56:16 - 09:13:29 2290
The Dalles 09:04:56 -20.8 Dark Down 20.0 237.8 Low 08:56:20 - 09:13:33 2286
Maupin 09:04:54 -21.2 Dark Down 20.2 238.0 Low 08:56:18 - 09:13:31 2252
Madras/Culver 09:04:53 -21.7 Dark Down 20.5 238.1 Low 08:56:17 - 09:13:30 2209
Sisters 09:04:53 -22.1 Dark Down 20.9 237.9 Low 08:56:17 - 09:13:30 2188
Redmond 09:04:52 -22.1 Dark Down 20.7 238.2 Low 08:56:16 - 09:13:29 2181
Bend 09:04:52 -22.3 Dark Down 20.9 238.2 Low 08:56:15 - 09:13:28 2165
Oregon Observatory 09:04:52 -22.5 Dark Down 21.1 238.1 Low 08:56:15 - 09:13:28 2153
La Pine/Gilchrist 09:04:51 -22.7 Dark Down 21.2 238.1 Low 08:56:14 - 09:13:27 2137
North Lake 09:04:48 -23.0 Dark Down 21.1 238.8 Low 08:56:12 - 09:13:25 2094
Chiloquin 09:04:49 -23.8 Dark Down 22.0 238.2 Low 08:56:12 - 09:13:25 2050
Paisley 09:04:46 -23.5 Dark Down 21.2 239.2 Low 08:56:09 - 09:13:22 2044
Klamath Falls 09:04:47 -24.2 Dark Down 22.2 238.4 Low 08:56:11 - 09:13:24 2021
Lakeview 09:04:43 -23.9 Dark Down 21.3 239.6 Low 08:56:07 - 09:13:20 2000
Tulelake 09:04:46 -24.4 Dark Down 22.1 238.7 Low 08:56:10 - 09:13:23 1995
Cedarville 09:04:41 -24.5 Dark Down 21.5 239.9 Low 08:56:04 - 09:13:17 1943
Fall River/Burney 09:04:43 -25.2 Dark Down 22.6 239.1 Low 08:56:06 - 09:13:19 1917
Susanville 09:04:39 -25.7 Dark Down 22.4 239.9 Low 08:56:02 - 09:13:15 1854
Greenville 09:04:39 -26.0 Dark Down 22.7 239.8 Low 08:56:02 - 09:13:15 1834
Gimple 09:04:39 -26.0 Dark Down 22.7 239.8 Low 08:56:02 - 09:13:15 1833
Quincy 09:04:38 -26.2 Dark Down 22.8 239.8 Low 08:56:02 - 09:13:15 1817
Portola 09:04:37 -26.3 Dark Down 22.6 240.3 Low 08:56:00 - 09:13:13 1800
Reno 09:04:34 -26.4 Dark Down 22.3 240.9 Low 08:55:58 - 09:13:11 1769
Carson City 09:04:33 -26.7 Dark Down 22.5 241.0 Low 08:55:57 - 09:13:10 1737
Gardnerville 09:04:33 -27.0 Dark Down 22.5 241.1 Low 08:55:56 - 09:13:09 1715
Yerington 09:04:32 -26.8 Dark Down 22.1 241.6 Low 08:55:55 - 09:13:08 1712
Hawthorne 09:04:29 -27.1 Dark Down 22.0 242.1 Low 08:55:52 - 09:13:05 1664
Niwot 09:04:03 -21.6 Dark Down 11.9 251.4 Really Low 08:55:26 - 09:12:39 1636
Lee Vining 09:04:29 -27.8 Dark Down 22.6 242.0 Low 08:55:52 - 09:13:05 1621
Tonopah 09:04:24 -27.2 Dark Down 21.2 243.4 Low 08:55:47 - 09:13:00 1605
Bishop 09:04:25 -28.2 Dark Down 22.4 242.7 Low 08:55:48 - 09:13:01 1558
Beatty 09:04:19 -28.2 Dark Down 21.4 244.1 Low 08:55:43 - 09:12:56 1494
Lone Pine 09:04:22 -28.8 Dark Down 22.5 243.3 Low 08:55:45 - 09:12:58 1485
Indian Springs 09:04:16 -28.2 Dark Down 20.8 245.0 Low 08:55:39 - 09:12:52 1451
CPSLO 09:04:26 -30.7 Dark Down 24.9 241.8 Low 08:55:50 - 09:13:03 1402
Henderson 09:04:12 -28.6 Dark Down 20.5 245.7 Low 08:55:36 - 09:12:49 1393
Searchlight/Boulder City 09:04:10 -29.1 Dark Down 20.7 245.9 Low 08:55:34 - 09:12:47 1339
Patrick 09:04:08 -28.8 Dark Down 20.0 246.7 Really Low 08:55:31 - 09:12:44 1320
Laughlin/Bullhead City 09:04:09 -29.2 Dark Down 20.6 246.2 Low 08:55:32 - 09:12:45 1307
Kingman/Dolan Springs 09:04:07 -29.1 Dark Down 20.2 246.6 Low 08:55:31 - 09:12:44 1302
DCO 09:04:05 -28.9 Dark Down 19.5 247.2 Really Low 08:55:29 - 09:12:42 1283
Mohave Valley 09:04:08 -29.5 Dark Down 20.7 246.3 Low 08:55:32 - 09:12:45 1281
Wildwood 09:04:17 -31.4 Dark Down 24.0 243.8 Low 08:55:41 - 09:12:54 1263
Lake Havasu City 09:04:06 -29.8 Dark Down 20.7 246.7 Low 08:55:30 - 09:12:43 1241
Parker 09:04:06 -30.1 Dark Down 20.8 246.8 Low 08:55:29 - 09:12:42 1208
Idyllwild 09:04:11 -31.2 Dark Down 22.8 245.3 Low 08:55:34 - 09:12:47 1204
Blythe 09:04:05 -30.7 Dark Down 21.2 246.8 Low 08:55:28 - 09:12:41 1163
Calipatria 09:04:06 -31.4 Dark Down 22.1 246.3 Low 08:55:30 - 09:12:43 1129
Yuma 09:04:03 -31.6 Dark Down 21.6 247.1 Low 08:55:26 - 09:12:39 1076

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 38628, (2019/07/08 09:09UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.37  69
13Zet Oph      16:37:09.6 -10:34:01  2.6  4.67  67
PPM 199844     16:38:01.6 -06:32:17  6.4  1.58  67
PPM 199789     16:34:28.3 -06:08:11  8.4  0.63  66
PPM 199743     16:31:59.4 -06:09:53  9.5  0.09  65
38628          16:31:56.9 -06:04:25 13.4        65
Positions are for J2000

Event circumstances last updated at 2017/08/04 18:08:59 UT

Marc W. Buie, Southwest Research Institute

RECON