RECON: TNO occultation with 28978

Event between (28978) Ixion and star UC4-304-140538 with event index number of 197512

Geocentric closest approach at 2019/06/25 06:46:23 UTC

J2000 position of star is 17:47:45.2 -29:19:28
Equinox of date position of star is 17:48:59.5 -29:19:48
Stellar brightness R=15.7, use SENSEUP=128
Star is 94 degrees from the moon. Moon is 51% illuminated.
TNO apparent brightness V=19.5

[RECON map]
TNO is 39.2 AU from the Sun and 38.2 AU from the Earth.
The TNO is moving 24.8 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 204 seconds.
The 1-sigma cross-track error in the shadow position is 2320 km.
The sky-plane scale is 27714.1 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 46.3 sec chord
Diameter=468.7 km assuming a 30% albedo -- 18.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 28978, (2019/06/25 06:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.3 -26:28:25  0.9 17.53 112
34Ups Sco      17:32:05.4 -37:18:34  2.7  8.72  97
3 Sgr          17:48:47.3 -27:50:11  4.2  1.49  94
PPM 267355     17:50:43.0 -29:19:10  8.4  0.38  94
PPM 267319     17:49:16.1 -29:20:04  9.7  0.06  94
28978          17:48:59.7 -29:19:48 15.7        94
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 4.4 sigma about the mid-time.
The median site spacing is 11.1 km RECON observability=0.4 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kelowna 06:46:49 -14.9 AT Down 10.1 169.8 Really Low 06:31:49 - 07:01:49 9245
Summerland 06:46:51 -15.2 AT Down 10.4 169.6 Really Low 06:31:51 - 07:01:51 9237
Penticton 06:46:51 -15.2 AT Down 10.5 169.7 Really Low 06:31:51 - 07:01:51 9236
Okanagan Falls 06:46:51 -15.4 AT Down 10.6 169.7 Really Low 06:31:51 - 07:01:51 9232
Oliver 06:46:51 -15.6 AT Down 10.8 169.7 Really Low 06:31:51 - 07:01:51 9229
Anarchist Mountain Observatory 06:46:50 -15.8 AT Down 11.0 169.8 Really Low 06:31:50 - 07:01:50 9226
Oroville 06:46:50 -15.8 AT Down 11.1 169.8 Really Low 06:31:50 - 07:01:50 9224
Tonasket 06:46:51 -16.1 AT Down 11.3 169.8 Really Low 06:31:51 - 07:01:51 9218
Okanogan 06:46:51 -16.4 AT Down 11.6 169.6 Really Low 06:31:51 - 07:01:51 9210
Brewster 06:46:52 -16.6 AT Down 11.9 169.4 Really Low 06:31:52 - 07:01:52 9202
Manson/Chelan 06:46:53 -16.7 AT Down 12.0 169.1 Really Low 06:31:53 - 07:01:53 9195
Entiat 06:46:53 -16.9 AT Down 12.2 169.0 Really Low 06:31:53 - 07:01:53 9189
Wenatchee 06:46:55 -17.1 AT Down 12.5 168.9 Really Low 06:31:55 - 07:01:55 9181
Ellensburg 06:46:55 -17.5 AT Down 12.8 168.7 Really Low 06:31:55 - 07:01:55 9169
Yakima 06:46:55 -17.8 AT Down 13.2 168.7 Really Low 06:31:55 - 07:01:55 9158
Pasco 06:46:51 -18.5 Dark Down 13.7 169.9 Really Low 06:31:51 - 07:01:51 9157
Toppenish/White Swan 06:46:55 -18.1 Dark Down 13.5 168.8 Really Low 06:31:55 - 07:01:55 9153
PNWRO 06:46:51 -18.7 Dark Down 14.0 170.1 Really Low 06:31:51 - 07:01:51 9151
George/Umatilla 06:46:52 -18.7 Dark Down 14.0 169.7 Really Low 06:31:52 - 07:01:52 9146
Goldendale 06:46:57 -18.5 Dark Down 13.9 168.4 Really Low 06:31:57 - 07:01:57 9135
The Dalles 06:46:58 -18.6 Dark Down 14.1 168.1 Really Low 06:31:58 - 07:01:58 9126
Maupin 06:46:58 -19.1 Dark Down 14.5 168.2 Really Low 06:31:58 - 07:01:58 9114
Madras/Culver 06:46:59 -19.6 Dark Down 15.1 168.1 Really Low 06:31:59 - 07:01:59 9097
Redmond 06:46:59 -19.9 Dark Down 15.4 168.0 Really Low 06:31:59 - 07:01:59 9085
Sisters 06:47:00 -19.8 Dark Down 15.3 167.7 Really Low 06:32:00 - 07:02:00 9083
Bend 06:47:00 -20.1 Dark Down 15.6 167.9 Really Low 06:32:00 - 07:02:00 9078
Oregon Observatory 06:47:00 -20.2 Dark Down 15.8 167.8 Really Low 06:32:00 - 07:02:00 9071
La Pine/Gilchrist 06:47:00 -20.4 Dark Down 15.9 167.7 Really Low 06:32:00 - 07:02:00 9064
North Lake 06:46:58 -20.9 Dark Down 16.5 168.2 Really Low 06:31:58 - 07:01:58 9053
Paisley 06:46:58 -21.5 Dark Down 17.1 168.5 Really Low 06:31:58 - 07:01:58 9037
Chiloquin 06:47:02 -21.3 Dark Down 17.0 167.3 Really Low 06:32:02 - 07:02:02 9023
Lakeview 06:46:58 -22.1 Dark Down 17.6 168.7 Really Low 06:31:58 - 07:01:58 9020
Klamath Falls 06:47:02 -21.7 Dark Down 17.3 167.4 Really Low 06:32:02 - 07:02:02 9012
Tulelake 06:47:02 -22.0 Dark Down 17.6 167.6 Really Low 06:32:02 - 07:02:02 9004
Cedarville 06:46:58 -22.7 Dark Down 18.2 168.8 Really Low 06:31:58 - 07:01:58 8998
Fall River/Burney 06:47:02 -22.9 Dark Down 18.5 167.6 Really Low 06:32:02 - 07:02:02 8971
Niwot 06:46:08 -26.4 Dark Down 20.5 182.4 Low 06:31:08 - 07:01:08 8963
SwRI 06:46:09 -26.5 Dark Down 20.6 182.3 Low 06:31:09 - 07:01:09 8959
Susanville 06:47:00 -23.7 Dark Down 19.3 168.3 Really Low 06:32:00 - 07:02:00 8953
Gimple 06:47:01 -23.9 Dark Down 19.5 168.1 Really Low 06:32:01 - 07:02:01 8940
Greenville 06:47:01 -23.8 Dark Down 19.5 168.0 Really Low 06:32:01 - 07:02:01 8940
Quincy 06:47:01 -24.0 Dark Down 19.7 168.0 Really Low 06:32:01 - 07:02:01 8932
Portola 06:46:59 -24.3 Dark Down 19.9 168.4 Really Low 06:31:59 - 07:01:59 8930
Reno 06:46:58 -24.7 Dark Down 20.2 169.0 Low 06:31:58 - 07:01:58 8924
Carson City 06:46:58 -25.0 Dark Down 20.6 169.0 Low 06:31:58 - 07:01:58 8909
Yerington 06:46:57 -25.4 Dark Down 20.9 169.5 Low 06:31:57 - 07:01:57 8905
Gardnerville 06:46:58 -25.3 Dark Down 20.8 169.0 Low 06:31:58 - 07:01:58 8899
Hawthorne 06:46:55 -25.9 Dark Down 21.4 170.0 Low 06:31:55 - 07:01:55 8889
Tonopah 06:46:50 -26.7 Dark Down 22.1 171.2 Low 06:31:50 - 07:01:50 8876
Lee Vining 06:46:57 -26.4 Dark Down 21.9 169.5 Low 06:31:57 - 07:01:57 8862
Bishop 06:46:55 -27.1 Dark Down 22.6 170.1 Low 06:31:55 - 07:01:55 8840
Beatty 06:46:49 -27.9 Dark Down 23.3 171.6 Low 06:31:49 - 07:01:49 8827
Indian Springs 06:46:46 -28.5 Dark Down 23.7 172.6 Low 06:31:46 - 07:01:46 8817
Lone Pine 06:46:53 -27.9 Dark Down 23.4 170.4 Low 06:31:53 - 07:01:53 8808
Henderson 06:46:43 -29.1 Dark Down 24.3 173.2 Low 06:31:43 - 07:01:43 8795
Patrick 06:46:39 -30.0 Dark Down 25.0 174.2 Low 06:31:39 - 07:01:39 8768
Searchlight/Boulder City 06:46:43 -29.7 Dark Down 24.9 173.2 Low 06:31:43 - 07:01:43 8768
Kingman/Dolan Springs 06:46:40 -30.1 Dark Down 25.2 174.0 Low 06:31:40 - 07:01:40 8757
DCO 06:46:37 -30.4 Dark Down 25.4 174.9 Low 06:31:37 - 07:01:37 8755
Laughlin/Bullhead City 06:46:42 -30.1 Dark Down 25.2 173.5 Low 06:31:42 - 07:01:42 8755
Mohave Valley 06:46:42 -30.3 Dark Down 25.5 173.5 Low 06:31:42 - 07:01:42 8742
CPSLO 06:47:04 -28.5 Dark Down 24.3 167.9 Low 06:32:04 - 07:02:04 8731
Lake Havasu City 06:46:42 -30.8 Dark Down 25.9 173.7 Low 06:31:42 - 07:01:42 8723
Parker 06:46:41 -31.1 Dark Down 26.2 173.8 Low 06:31:41 - 07:01:41 8706
Wildwood 06:46:57 -30.2 Dark Down 25.8 169.7 Low 06:31:57 - 07:01:57 8685
Blythe 06:46:43 -31.6 Dark Down 26.7 173.4 Low 06:31:43 - 07:01:43 8679
Idyllwild 06:46:50 -31.0 Dark Down 26.4 171.4 Low 06:31:50 - 07:01:50 8677
Calipatria 06:46:47 -31.8 Dark Down 27.1 172.5 Low 06:31:47 - 07:01:47 8651
Yuma 06:46:43 -32.4 Dark Down 27.7 173.3 Low 06:31:43 - 07:01:43 8631

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, (2019/06/25 06:46UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 17.53 112
34Ups Sco      17:30:45.8 -37:17:46  2.7  8.72  97
3 Sgr          17:47:33.6 -27:49:51  4.2  1.49  94
PPM 267355     17:49:28.5 -29:18:54  8.4  0.38  94
PPM 267319     17:48:01.6 -29:19:45  9.7  0.06  94
28978          17:47:45.2 -29:19:28 15.7        94
Positions are for J2000

Event circumstances last updated at 2019/06/07 22:20:03 UT

Marc W. Buie, Southwest Research Institute

RECON