RECON: TNO occultation with 28978

Event between (28978) Ixion and star UC4-306-135848 with event index number of 128137

Geocentric closest approach at 2018/06/13 09:16:22 UTC

J2000 position of star is 17:42:37.9 -28:48:32
Equinox of date position of star is 17:43:40.8 -28:48:56
Stellar brightness R=16.5
Star is 166 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=19.5

[RECON map]
TNO is 39.5 AU from the Sun and 38.5 AU from the Earth.
The TNO is moving 24.9 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 164 seconds.
The 1-sigma cross-track error in the shadow position is 2095 km.
The sky-plane scale is 27895.3 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 46.0 sec chord
Diameter=468.7 km assuming a 30% albedo -- 18.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 28978, (2018/06/13 09:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.5 -26:28:17  0.9 16.38 169
34Ups Sco      17:32:01.2 -37:18:32  2.7  8.84 160
3 Sgr          17:48:43.4 -27:50:10  4.2  1.46 166
PPM 267171     17:43:42.9 -28:19:15  8.3  0.50 167
PPM 267172     17:43:46.7 -28:46:17  9.5  0.05 166
28978          17:43:48.2 -28:48:59 16.5       166
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 14.8 km RECON observability=0.5 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:15:28 -15.8 AT Down 11.0 193.7 Really Low 09:01:19 - 09:29:37 10635
Tonasket 09:15:28 -16.0 AT Down 11.3 193.7 Really Low 09:01:19 - 09:29:37 10629
Okanogan 09:15:28 -16.4 AT Down 11.6 193.6 Really Low 09:01:19 - 09:29:37 10622
Brewster 09:15:29 -16.7 AT Down 11.9 193.5 Really Low 09:01:20 - 09:29:38 10617
Manson/Chelan 09:15:29 -16.9 AT Down 12.2 193.1 Really Low 09:01:20 - 09:29:38 10616
Entiat 09:15:30 -17.2 AT Down 12.4 193.1 Really Low 09:01:21 - 09:29:39 10610
Wenatchee 09:15:30 -17.4 AT Down 12.7 193.0 Really Low 09:01:21 - 09:29:39 10604
Ellensburg 09:15:30 -17.9 AT Down 13.1 192.8 Really Low 09:01:21 - 09:29:39 10595
Yakima 09:15:30 -18.3 Dark Down 13.5 192.9 Really Low 09:01:21 - 09:29:39 10583
Toppenish/White Swan 09:15:30 -18.4 Dark Down 13.7 193.0 Really Low 09:01:21 - 09:29:39 10575
Goldendale 09:15:30 -19.0 Dark Down 14.3 192.7 Really Low 09:01:21 - 09:29:39 10563
The Dalles 09:15:32 -19.3 Dark Down 14.6 192.4 Really Low 09:01:23 - 09:29:41 10560
Pasco 09:15:26 -18.3 Dark Down 13.6 194.1 Really Low 09:01:17 - 09:29:35 10555
George/Umatilla 09:15:25 -18.6 Dark Down 14.0 194.0 Really Low 09:01:16 - 09:29:34 10547
Maupin 09:15:31 -19.7 Dark Down 15.0 192.5 Really Low 09:01:22 - 09:29:40 10545
PNWRO 09:15:24 -18.5 Dark Down 13.8 194.3 Really Low 09:01:15 - 09:29:33 10545
Madras/Culver 09:15:30 -20.2 Dark Down 15.5 192.5 Really Low 09:01:21 - 09:29:39 10528
Sisters 09:15:31 -20.7 Dark Down 15.9 192.1 Really Low 09:01:22 - 09:29:40 10523
Redmond 09:15:30 -20.6 Dark Down 15.9 192.4 Really Low 09:01:21 - 09:29:39 10517
Bend 09:15:30 -20.8 Dark Down 16.1 192.3 Really Low 09:01:21 - 09:29:39 10512
Oregon Observatory 09:15:30 -21.0 Dark Down 16.3 192.2 Really Low 09:01:21 - 09:29:39 10507
La Pine/Gilchrist 09:15:30 -21.2 Dark Down 16.5 192.2 Really Low 09:01:21 - 09:29:39 10501
North Lake 09:15:28 -21.5 Dark Down 16.8 192.7 Really Low 09:01:19 - 09:29:37 10478
Chiloquin 09:15:32 -22.4 Dark Down 17.6 191.9 Really Low 09:01:23 - 09:29:41 10465
Paisley 09:15:27 -22.0 Dark Down 17.3 193.1 Really Low 09:01:18 - 09:29:36 10453
Klamath Falls 09:15:30 -22.7 Dark Down 17.9 192.0 Really Low 09:01:21 - 09:29:39 10451
Tulelake 09:15:29 -22.9 Dark Down 18.2 192.3 Really Low 09:01:20 - 09:29:38 10437
Lakeview 09:15:26 -22.4 Dark Down 17.8 193.3 Really Low 09:01:17 - 09:29:35 10432
Cedarville 09:15:25 -23.0 Dark Down 18.4 193.5 Really Low 09:01:16 - 09:29:34 10404
Fall River/Burney 09:15:29 -23.7 Dark Down 19.0 192.5 Really Low 09:01:20 - 09:29:38 10401
Susanville 09:15:26 -24.2 Dark Down 19.5 193.2 Really Low 09:01:17 - 09:29:35 10366
Greenville 09:15:27 -24.5 Dark Down 19.9 192.9 Really Low 09:01:18 - 09:29:36 10358
Quincy 09:15:26 -24.7 Dark Down 20.1 192.9 Low 09:01:17 - 09:29:35 10350
Portola 09:15:25 -24.7 Dark Down 20.1 193.4 Low 09:01:16 - 09:29:34 10338
Reno 09:15:23 -24.8 Dark Down 20.2 194.0 Low 09:01:14 - 09:29:32 10318
Carson City 09:15:23 -25.1 Dark Down 20.6 194.0 Low 09:01:14 - 09:29:32 10302
Gardnerville 09:15:22 -25.3 Dark Down 20.8 194.1 Low 09:01:13 - 09:29:31 10291
Yerington 09:15:20 -25.1 Dark Down 20.6 194.6 Low 09:01:11 - 09:29:29 10285
Hawthorne 09:15:19 -25.4 Dark Down 21.0 195.2 Low 09:01:10 - 09:29:28 10256
Lee Vining 09:15:19 -26.1 Dark Down 21.6 194.8 Low 09:01:10 - 09:29:28 10239
Tonopah 09:15:14 -25.5 Dark Down 21.1 196.5 Low 09:01:05 - 09:29:23 10214
Bishop 09:15:17 -26.4 Dark Down 22.1 195.5 Low 09:01:08 - 09:29:26 10199
Lone Pine 09:15:16 -27.1 Dark Down 22.7 195.9 Low 09:01:07 - 09:29:25 10158
Beatty 09:15:11 -26.4 Dark Down 22.1 197.0 Low 09:01:02 - 09:29:20 10151
CPSLO 09:15:23 -29.0 Dark Down 24.5 193.6 Low 09:01:14 - 09:29:32 10132
Indian Springs 09:15:08 -26.4 Dark Down 22.2 198.0 Low 09:00:59 - 09:29:17 10117
Henderson 09:15:05 -26.6 Dark Down 22.5 198.7 Low 09:00:56 - 09:29:14 10078
Niwot 09:14:38 -19.4 Dark Down 15.8 206.6 Really Low 09:00:29 - 09:28:47 10073
Searchlight/Boulder City 09:15:05 -27.1 Dark Down 23.1 198.8 Low 09:00:56 - 09:29:14 10049
Wildwood 09:15:16 -29.6 Dark Down 25.3 195.7 Low 09:01:07 - 09:29:25 10040
Patrick 09:15:01 -26.8 Dark Down 22.8 199.8 Low 09:00:52 - 09:29:10 10027
Laughlin/Bullhead City 09:15:03 -27.3 Dark Down 23.3 199.2 Low 09:00:54 - 09:29:12 10027
Kingman/Dolan Springs 09:15:01 -27.1 Dark Down 23.1 199.7 Low 09:00:52 - 09:29:10 10019
Mohave Valley 09:15:03 -27.5 Dark Down 23.5 199.2 Low 09:00:54 - 09:29:12 10012
DCO 09:14:58 -26.8 Dark Down 22.9 200.5 Low 09:00:49 - 09:29:07 9998
Idyllwild 09:15:08 -29.3 Dark Down 25.2 197.5 Low 09:00:59 - 09:29:17 9991
Lake Havasu City 09:15:01 -27.8 Dark Down 23.8 199.5 Low 09:00:52 - 09:29:10 9987
Parker 09:15:01 -28.1 Dark Down 24.1 199.6 Low 09:00:52 - 09:29:10 9968
Blythe 09:15:01 -28.7 Dark Down 24.7 199.4 Low 09:00:52 - 09:29:10 9945
Calipatria 09:15:05 -29.5 Dark Down 25.4 198.6 Low 09:00:56 - 09:29:14 9936
Yuma 09:15:01 -29.5 Dark Down 25.6 199.5 Low 09:00:52 - 09:29:10 9895

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 28978, (2018/06/13 09:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 16.38 169
34Ups Sco      17:30:45.8 -37:17:46  2.7  8.84 160
3 Sgr          17:47:33.6 -27:49:51  4.2  1.46 166
PPM 267171     17:42:32.9 -28:18:48  8.3  0.50 167
PPM 267172     17:42:36.5 -28:45:50  9.5  0.05 166
28978          17:42:37.9 -28:48:32 16.5       166
Positions are for J2000

Event circumstances last updated at 2016/07/01 17:36:33 UT

Marc W. Buie, Southwest Research Institute

RECON