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 09:09:16 UTC

J2000 position of star is 16:31:56.9 -06:04:25
Equinox of date position of star is 16:32:54.4 -06:06:39
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 17.3 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 109 seconds.
The 1-sigma cross-track error in the shadow position is 1025 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 22.0 km RECON observability=0.7 and success probability=28.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:05:26 -17.2 AT Down 17.2 238.5 Really Low 08:55:52 - 09:14:59 1565
Tonasket 09:05:25 -17.4 AT Down 17.3 238.5 Really Low 08:55:51 - 09:14:58 1548
Okanogan 09:05:24 -17.8 AT Down 17.6 238.5 Really Low 08:55:51 - 09:14:58 1524
Brewster 09:05:24 -18.1 Dark Down 17.8 238.4 Really Low 08:55:50 - 09:14:57 1506
Manson/Chelan 09:05:24 -18.4 Dark Down 18.1 238.1 Really Low 08:55:50 - 09:14:57 1494
Entiat 09:05:23 -18.6 Dark Down 18.3 238.1 Really Low 08:55:50 - 09:14:57 1478
Wenatchee 09:05:22 -18.9 Dark Down 18.5 238.1 Really Low 08:55:49 - 09:14:56 1460
Ellensburg 09:05:22 -19.3 Dark Down 18.8 238.0 Really Low 08:55:49 - 09:14:56 1431
Yakima 09:05:21 -19.7 Dark Down 19.1 238.1 Really Low 08:55:47 - 09:14:54 1400
Toppenish/White Swan 09:05:19 -19.9 Dark Down 19.1 238.3 Really Low 08:55:46 - 09:14:53 1381
Pasco 09:05:16 -19.8 Dark Down 18.4 239.4 Really Low 08:55:42 - 09:14:49 1357
Goldendale 09:05:19 -20.5 Dark Down 19.6 238.1 Really Low 08:55:45 - 09:14:52 1343
PNWRO 09:05:15 -20.0 Dark Down 18.4 239.7 Really Low 08:55:41 - 09:14:48 1334
George/Umatilla 09:05:15 -20.1 Dark Down 18.7 239.3 Really Low 08:55:42 - 09:14:49 1333
The Dalles 09:05:19 -20.8 Dark Down 20.0 237.9 Really Low 08:55:45 - 09:14:52 1329
Maupin 09:05:17 -21.1 Dark Down 20.1 238.1 Low 08:55:44 - 09:14:51 1295
Madras/Culver 09:05:16 -21.7 Dark Down 20.4 238.2 Low 08:55:42 - 09:14:49 1252
Sisters 09:05:16 -22.1 Dark Down 20.9 238.0 Low 08:55:43 - 09:14:50 1230
Redmond 09:05:15 -22.0 Dark Down 20.7 238.3 Low 08:55:42 - 09:14:49 1224
Bend 09:05:15 -22.3 Dark Down 20.9 238.2 Low 08:55:41 - 09:14:48 1208
Oregon Observatory 09:05:14 -22.5 Dark Down 21.0 238.2 Low 08:55:41 - 09:14:48 1195
La Pine/Gilchrist 09:05:14 -22.7 Dark Down 21.2 238.2 Low 08:55:40 - 09:14:47 1180
North Lake 09:05:11 -23.0 Dark Down 21.0 238.8 Low 08:55:38 - 09:14:45 1137
Chiloquin 09:05:11 -23.8 Dark Down 22.0 238.3 Low 08:55:38 - 09:14:45 1093
Paisley 09:05:08 -23.5 Dark Down 21.1 239.3 Low 08:55:35 - 09:14:42 1087
Klamath Falls 09:05:11 -24.1 Dark Down 22.1 238.5 Low 08:55:37 - 09:14:44 1064
Lakeview 09:05:07 -23.9 Dark Down 21.2 239.6 Low 08:55:33 - 09:14:40 1042
Tulelake 09:05:09 -24.4 Dark Down 22.1 238.8 Low 08:55:35 - 09:14:42 1037
Cedarville 09:05:04 -24.5 Dark Down 21.5 240.0 Low 08:55:31 - 09:14:38 985
Fall River/Burney 09:05:06 -25.2 Dark Down 22.5 239.2 Low 08:55:33 - 09:14:40 960
Susanville 09:05:02 -25.7 Dark Down 22.3 240.0 Low 08:55:29 - 09:14:36 897
Greenville 09:05:02 -26.0 Dark Down 22.7 239.8 Low 08:55:29 - 09:14:36 877
Gimple 09:05:02 -26.0 Dark Down 22.6 239.9 Low 08:55:28 - 09:14:35 876
Quincy 09:05:02 -26.2 Dark Down 22.8 239.9 Low 08:55:28 - 09:14:35 860
Portola 09:05:00 -26.2 Dark Down 22.5 240.3 Low 08:55:27 - 09:14:34 843
Reno 09:04:57 -26.4 Dark Down 22.2 240.9 Low 08:55:24 - 09:14:31 811
Carson City 09:04:57 -26.7 Dark Down 22.4 241.1 Low 08:55:23 - 09:14:30 780
Gardnerville 09:04:56 -26.9 Dark Down 22.5 241.2 Low 08:55:22 - 09:14:29 758
Yerington 09:04:54 -26.8 Dark Down 22.1 241.7 Low 08:55:20 - 09:14:27 755
Hawthorne 09:04:51 -27.1 Dark Down 21.9 242.2 Low 08:55:18 - 09:14:25 707
Niwot 09:04:26 -21.6 Dark Down 11.8 251.5 Really Low 08:54:52 - 09:13:59 678
Lee Vining 09:04:51 -27.7 Dark Down 22.5 242.0 Low 08:55:18 - 09:14:25 663
Tonopah 09:04:46 -27.2 Dark Down 21.2 243.4 Low 08:55:13 - 09:14:20 647
Bishop 09:04:47 -28.2 Dark Down 22.3 242.8 Low 08:55:14 - 09:14:21 601
Beatty 09:04:42 -28.2 Dark Down 21.4 244.2 Low 08:55:09 - 09:14:16 537
Lone Pine 09:04:45 -28.8 Dark Down 22.4 243.3 Low 08:55:11 - 09:14:18 528
Indian Springs 09:04:38 -28.2 Dark Down 20.7 245.1 Low 08:55:05 - 09:14:12 494
CPSLO 09:04:49 -30.6 Dark Down 24.9 241.9 Low 08:55:16 - 09:14:23 446
Henderson 09:04:35 -28.5 Dark Down 20.4 245.7 Low 08:55:02 - 09:14:09 436
Searchlight/Boulder City 09:04:33 -29.0 Dark Down 20.6 246.0 Low 08:55:00 - 09:14:07 382
Patrick 09:04:30 -28.8 Dark Down 19.9 246.7 Really Low 08:54:57 - 09:14:04 363
Laughlin/Bullhead City 09:04:32 -29.2 Dark Down 20.5 246.3 Low 08:54:58 - 09:14:05 350
Kingman/Dolan Springs 09:04:30 -29.0 Dark Down 20.1 246.7 Low 08:54:57 - 09:14:04 345
DCO 09:04:28 -28.8 Dark Down 19.5 247.3 Really Low 08:54:54 - 09:14:01 325
Mohave Valley 09:04:31 -29.5 Dark Down 20.6 246.4 Low 08:54:57 - 09:14:04 325
Wildwood 09:04:40 -31.3 Dark Down 23.9 243.9 Low 08:55:06 - 09:14:13 306
Lake Havasu City 09:04:29 -29.8 Dark Down 20.6 246.7 Low 08:54:56 - 09:14:03 284
Parker 09:04:28 -30.1 Dark Down 20.7 246.9 Low 08:54:54 - 09:14:01 251
Idyllwild 09:04:34 -31.2 Dark Down 22.7 245.3 Low 08:55:00 - 09:14:07 246
Blythe 09:04:28 -30.7 Dark Down 21.1 246.8 Low 08:54:54 - 09:14:01 206
Calipatria 09:04:29 -31.4 Dark Down 22.1 246.4 Low 08:54:55 - 09:14:02 173
Yuma 09:04:25 -31.5 Dark Down 21.5 247.1 Low 08:54:52 - 09:13:59 120

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 2017/12/06 19:06:58 UT

Marc W. Buie, Southwest Research Institute

RECON