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 06:44:52 UTC

J2000 position of star is 17:47:45.2 -29:19:28
Equinox of date position of star is 17:48:53.7 -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 2150 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 12.1 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 06:45:21 -15.8 AT Down 11.0 169.4 Really Low 06:30:21 - 07:00:21 6323
Tonasket 06:45:21 -16.0 AT Down 11.2 169.4 Really Low 06:30:21 - 07:00:21 6317
Okanogan 06:45:21 -16.3 AT Down 11.6 169.3 Really Low 06:30:21 - 07:00:21 6308
Brewster 06:45:22 -16.5 AT Down 11.8 169.1 Really Low 06:30:22 - 07:00:22 6301
Manson/Chelan 06:45:23 -16.6 AT Down 12.0 168.8 Really Low 06:30:23 - 07:00:23 6293
Entiat 06:45:24 -16.8 AT Down 12.2 168.7 Really Low 06:30:24 - 07:00:24 6287
Wenatchee 06:45:24 -17.0 AT Down 12.4 168.6 Really Low 06:30:24 - 07:00:24 6280
Ellensburg 06:45:25 -17.4 AT Down 12.8 168.4 Really Low 06:30:25 - 07:00:25 6268
Yakima 06:45:26 -17.8 AT Down 13.2 168.4 Really Low 06:30:26 - 07:00:26 6257
Pasco 06:45:21 -18.4 Dark Down 13.7 169.6 Really Low 06:30:21 - 07:00:21 6256
Toppenish/White Swan 06:45:25 -18.0 AT Down 13.4 168.5 Really Low 06:30:25 - 07:00:25 6252
PNWRO 06:45:21 -18.7 Dark Down 14.0 169.8 Really Low 06:30:21 - 07:00:21 6250
George/Umatilla 06:45:22 -18.7 Dark Down 14.0 169.4 Really Low 06:30:22 - 07:00:22 6245
Goldendale 06:45:27 -18.4 Dark Down 13.9 168.1 Really Low 06:30:27 - 07:00:27 6233
The Dalles 06:45:28 -18.5 Dark Down 14.1 167.8 Really Low 06:30:28 - 07:00:28 6224
Maupin 06:45:28 -19.0 Dark Down 14.5 167.8 Really Low 06:30:28 - 07:00:28 6213
Madras/Culver 06:45:29 -19.5 Dark Down 15.0 167.8 Really Low 06:30:29 - 07:00:29 6195
Redmond 06:45:29 -19.8 Dark Down 15.4 167.7 Really Low 06:30:29 - 07:00:29 6184
Sisters 06:45:30 -19.7 Dark Down 15.3 167.4 Really Low 06:30:30 - 07:00:30 6182
Bend 06:45:29 -20.0 Dark Down 15.5 167.6 Really Low 06:30:29 - 07:00:29 6176
Oregon Observatory 06:45:30 -20.1 Dark Down 15.7 167.4 Really Low 06:30:30 - 07:00:30 6169
La Pine/Gilchrist 06:45:31 -20.3 Dark Down 15.9 167.4 Really Low 06:30:31 - 07:00:31 6162
North Lake 06:45:29 -20.8 Dark Down 16.4 167.9 Really Low 06:30:29 - 07:00:29 6152
Paisley 06:45:28 -21.4 Dark Down 17.0 168.2 Really Low 06:30:28 - 07:00:28 6136
Chiloquin 06:45:33 -21.2 Dark Down 16.9 167.0 Really Low 06:30:33 - 07:00:33 6122
Lakeview 06:45:28 -22.0 Dark Down 17.5 168.3 Really Low 06:30:28 - 07:00:28 6119
Klamath Falls 06:45:33 -21.6 Dark Down 17.3 167.1 Really Low 06:30:33 - 07:00:33 6110
Tulelake 06:45:32 -21.9 Dark Down 17.6 167.3 Really Low 06:30:32 - 07:00:32 6103
Cedarville 06:45:28 -22.6 Dark Down 18.2 168.4 Really Low 06:30:28 - 07:00:28 6096
Fall River/Burney 06:45:32 -22.8 Dark Down 18.5 167.3 Really Low 06:30:32 - 07:00:32 6070
Niwot 06:44:39 -26.4 Dark Down 20.5 182.0 Low 06:29:39 - 06:59:39 6065
Susanville 06:45:30 -23.6 Dark Down 19.2 167.9 Really Low 06:30:30 - 07:00:30 6051
Gimple 06:45:31 -23.8 Dark Down 19.4 167.7 Really Low 06:30:31 - 07:00:31 6039
Greenville 06:45:31 -23.7 Dark Down 19.4 167.6 Really Low 06:30:31 - 07:00:31 6038
Quincy 06:45:32 -23.9 Dark Down 19.6 167.6 Really Low 06:30:32 - 07:00:32 6030
Portola 06:45:30 -24.2 Dark Down 19.8 168.1 Really Low 06:30:30 - 07:00:30 6028
Reno 06:45:28 -24.6 Dark Down 20.2 168.6 Low 06:30:28 - 07:00:28 6022
Carson City 06:45:28 -24.9 Dark Down 20.5 168.6 Low 06:30:28 - 07:00:28 6008
Yerington 06:45:27 -25.3 Dark Down 20.8 169.2 Low 06:30:27 - 07:00:27 6004
Gardnerville 06:45:28 -25.2 Dark Down 20.8 168.6 Low 06:30:28 - 07:00:28 5998
Hawthorne 06:45:25 -25.8 Dark Down 21.4 169.6 Low 06:30:25 - 07:00:25 5988
Tonopah 06:45:20 -26.6 Dark Down 22.0 170.9 Low 06:30:20 - 07:00:20 5975
Lee Vining 06:45:27 -26.3 Dark Down 21.8 169.1 Low 06:30:27 - 07:00:27 5961
Bishop 06:45:25 -27.0 Dark Down 22.5 169.8 Low 06:30:25 - 07:00:25 5939
Beatty 06:45:19 -27.8 Dark Down 23.2 171.2 Low 06:30:19 - 07:00:19 5927
Indian Springs 06:45:15 -28.4 Dark Down 23.7 172.2 Low 06:30:15 - 07:00:15 5917
Lone Pine 06:45:24 -27.8 Dark Down 23.3 170.0 Low 06:30:24 - 07:00:24 5907
Henderson 06:45:13 -29.0 Dark Down 24.3 172.8 Low 06:30:13 - 07:00:13 5895
Patrick 06:45:10 -29.9 Dark Down 25.0 173.9 Low 06:30:10 - 07:00:10 5869
Searchlight/Boulder City 06:45:13 -29.6 Dark Down 24.8 172.9 Low 06:30:13 - 07:00:13 5868
Kingman/Dolan Springs 06:45:11 -30.1 Dark Down 25.2 173.7 Low 06:30:11 - 07:00:11 5858
DCO 06:45:08 -30.3 Dark Down 25.3 174.5 Low 06:30:08 - 07:00:08 5856
Laughlin/Bullhead City 06:45:12 -30.0 Dark Down 25.2 173.2 Low 06:30:12 - 07:00:12 5855
Mohave Valley 06:45:13 -30.2 Dark Down 25.4 173.2 Low 06:30:13 - 07:00:13 5842
CPSLO 06:45:34 -28.3 Dark Down 24.2 167.5 Low 06:30:34 - 07:00:34 5829
Lake Havasu City 06:45:12 -30.7 Dark Down 25.9 173.4 Low 06:30:12 - 07:00:12 5823
Parker 06:45:11 -31.0 Dark Down 26.2 173.4 Low 06:30:11 - 07:00:11 5806
Wildwood 06:45:28 -30.1 Dark Down 25.7 169.3 Low 06:30:28 - 07:00:28 5784
Blythe 06:45:13 -31.5 Dark Down 26.7 173.1 Low 06:30:13 - 07:00:13 5779
Idyllwild 06:45:21 -30.9 Dark Down 26.3 171.1 Low 06:30:21 - 07:00:21 5776
Calipatria 06:45:17 -31.7 Dark Down 27.1 172.2 Low 06:30:17 - 07:00:17 5750
Yuma 06:45:14 -32.4 Dark Down 27.6 173.0 Low 06:30:14 - 07:00:14 5731

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 2017/12/06 19:04:36 UT

Marc W. Buie, Southwest Research Institute

RECON