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 06:44:51 UTC

J2000 position of star is 17:47:45.2 -29:19:28
Equinox of date position of star is 17:48:52.1 -29:19:46
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 187 seconds.
The 1-sigma cross-track error in the shadow position is 2148 km.
The sky-plane scale is 27714.2 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 06:45UT)
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 4.8 sigma about the mid-time.
The median site spacing is 12.0 km RECON observability=0.4 and success probability=0.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 06:45:19 -15.8 AT Down 11.0 169.4 Really Low 06:30:19 - 07:00:19 6324
Tonasket 06:45:20 -16.0 AT Down 11.2 169.4 Really Low 06:30:20 - 07:00:20 6319
Okanogan 06:45:21 -16.3 AT Down 11.6 169.3 Really Low 06:30:21 - 07:00:21 6310
Brewster 06:45:21 -16.5 AT Down 11.8 169.1 Really Low 06:30:21 - 07:00:21 6303
Manson/Chelan 06:45:22 -16.6 AT Down 12.0 168.8 Really Low 06:30:22 - 07:00:22 6295
Entiat 06:45:23 -16.8 AT Down 12.2 168.7 Really Low 06:30:23 - 07:00:23 6289
Wenatchee 06:45:24 -17.0 AT Down 12.4 168.6 Really Low 06:30:24 - 07:00:24 6282
Ellensburg 06:45:24 -17.4 AT Down 12.8 168.4 Really Low 06:30:24 - 07:00:24 6270
Yakima 06:45:25 -17.8 AT Down 13.2 168.4 Really Low 06:30:25 - 07:00:25 6259
Pasco 06:45:20 -18.4 Dark Down 13.7 169.6 Really Low 06:30:20 - 07:00:20 6258
Toppenish/White Swan 06:45:24 -18.0 AT Down 13.4 168.5 Really Low 06:30:24 - 07:00:24 6254
PNWRO 06:45:20 -18.7 Dark Down 14.0 169.8 Really Low 06:30:20 - 07:00:20 6252
George/Umatilla 06:45:22 -18.7 Dark Down 14.0 169.4 Really Low 06:30:22 - 07:00:22 6247
Goldendale 06:45:26 -18.4 Dark Down 13.9 168.1 Really Low 06:30:26 - 07:00:26 6236
The Dalles 06:45:27 -18.5 Dark Down 14.1 167.8 Really Low 06:30:27 - 07:00:27 6226
Maupin 06:45:28 -19.0 Dark Down 14.5 167.8 Really Low 06:30:28 - 07:00:28 6215
Madras/Culver 06:45:29 -19.5 Dark Down 15.0 167.8 Really Low 06:30:29 - 07:00:29 6198
Redmond 06:45:28 -19.8 Dark Down 15.4 167.7 Really Low 06:30:28 - 07:00:28 6187
Sisters 06:45:30 -19.7 Dark Down 15.3 167.4 Really Low 06:30:30 - 07:00:30 6185
Bend 06:45:29 -20.0 Dark Down 15.5 167.6 Really Low 06:30:29 - 07:00:29 6179
Oregon Observatory 06:45:29 -20.1 Dark Down 15.7 167.4 Really Low 06:30:29 - 07:00:29 6173
La Pine/Gilchrist 06:45:30 -20.3 Dark Down 15.9 167.4 Really Low 06:30:30 - 07:00:30 6166
North Lake 06:45:28 -20.8 Dark Down 16.4 167.9 Really Low 06:30:28 - 07:00:28 6155
Paisley 06:45:27 -21.4 Dark Down 17.0 168.2 Really Low 06:30:27 - 07:00:27 6139
Chiloquin 06:45:32 -21.2 Dark Down 16.9 167.0 Really Low 06:30:32 - 07:00:32 6125
Lakeview 06:45:27 -22.0 Dark Down 17.5 168.3 Really Low 06:30:27 - 07:00:27 6122
Klamath Falls 06:45:32 -21.6 Dark Down 17.3 167.0 Really Low 06:30:32 - 07:00:32 6113
Tulelake 06:45:31 -21.9 Dark Down 17.6 167.3 Really Low 06:30:31 - 07:00:31 6106
Cedarville 06:45:28 -22.6 Dark Down 18.2 168.4 Really Low 06:30:28 - 07:00:28 6100
Fall River/Burney 06:45:32 -22.8 Dark Down 18.5 167.3 Really Low 06:30:32 - 07:00:32 6073
Niwot 06:44:38 -26.4 Dark Down 20.5 182.0 Low 06:29:38 - 06:59:38 6066
Susanville 06:45:29 -23.6 Dark Down 19.2 167.9 Really Low 06:30:29 - 07:00:29 6054
Gimple 06:45:31 -23.8 Dark Down 19.4 167.7 Really Low 06:30:31 - 07:00:31 6042
Greenville 06:45:31 -23.7 Dark Down 19.4 167.6 Really Low 06:30:31 - 07:00:31 6041
Quincy 06:45:31 -23.9 Dark Down 19.6 167.6 Really Low 06:30:31 - 07:00:31 6033
Portola 06:45:29 -24.2 Dark Down 19.8 168.1 Really Low 06:30:29 - 07:00:29 6032
Reno 06:45:27 -24.6 Dark Down 20.2 168.6 Low 06:30:27 - 07:00:27 6025
Carson City 06:45:27 -24.9 Dark Down 20.5 168.6 Low 06:30:27 - 07:00:27 6011
Yerington 06:45:26 -25.3 Dark Down 20.8 169.2 Low 06:30:26 - 07:00:26 6007
Gardnerville 06:45:27 -25.2 Dark Down 20.8 168.6 Low 06:30:27 - 07:00:27 6001
Hawthorne 06:45:24 -25.8 Dark Down 21.4 169.6 Low 06:30:24 - 07:00:24 5990
Tonopah 06:45:20 -26.6 Dark Down 22.0 170.9 Low 06:30:20 - 07:00:20 5978
Lee Vining 06:45:26 -26.3 Dark Down 21.8 169.1 Low 06:30:26 - 07:00:26 5964
Bishop 06:45:24 -27.0 Dark Down 22.5 169.8 Low 06:30:24 - 07:00:24 5942
Beatty 06:45:19 -27.8 Dark Down 23.2 171.2 Low 06:30:19 - 07:00:19 5929
Indian Springs 06:45:15 -28.4 Dark Down 23.7 172.2 Low 06:30:15 - 07:00:15 5919
Lone Pine 06:45:23 -27.8 Dark Down 23.3 170.0 Low 06:30:23 - 07:00:23 5909
Henderson 06:45:13 -29.0 Dark Down 24.3 172.8 Low 06:30:13 - 07:00:13 5896
Patrick 06:45:09 -29.9 Dark Down 25.0 173.9 Low 06:30:09 - 07:00:09 5870
Searchlight/Boulder City 06:45:13 -29.6 Dark Down 24.8 172.9 Low 06:30:13 - 07:00:13 5870
Kingman/Dolan Springs 06:45:09 -30.1 Dark Down 25.2 173.7 Low 06:30:09 - 07:00:09 5859
DCO 06:45:07 -30.3 Dark Down 25.3 174.5 Low 06:30:07 - 07:00:07 5857
Laughlin/Bullhead City 06:45:11 -30.0 Dark Down 25.2 173.2 Low 06:30:11 - 07:00:11 5856
Mohave Valley 06:45:11 -30.2 Dark Down 25.4 173.2 Low 06:30:11 - 07:00:11 5843
CPSLO 06:45:33 -28.3 Dark Down 24.2 167.5 Low 06:30:33 - 07:00:33 5831
Lake Havasu City 06:45:11 -30.7 Dark Down 25.9 173.4 Low 06:30:11 - 07:00:11 5824
Parker 06:45:11 -31.0 Dark Down 26.2 173.4 Low 06:30:11 - 07:00:11 5807
Wildwood 06:45:26 -30.1 Dark Down 25.7 169.3 Low 06:30:26 - 07:00:26 5786
Blythe 06:45:11 -31.5 Dark Down 26.7 173.1 Low 06:30:11 - 07:00:11 5780
Idyllwild 06:45:20 -30.9 Dark Down 26.3 171.1 Low 06:30:20 - 07:00:20 5779
Calipatria 06:45:15 -31.7 Dark Down 27.1 172.1 Low 06:30:15 - 07:00:15 5751
Yuma 06:45:13 -32.4 Dark Down 27.6 173.0 Low 06:30:13 - 07:00:13 5732

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 06:45UT)
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 2017/07/01 17:48:30 UT

Marc W. Buie, Southwest Research Institute

RECON