RECON: TNO occultation with 28978

Event between (28978) Ixion and star UC4-304-144946 with event index number of 187755

Geocentric closest approach at 2019/04/30 11:29:08 UTC

J2000 position of star is 17:52:34.8 -29:13:08
Equinox of date position of star is 17:53:41.0 -29:13:18
Stellar brightness R=11.6, use SENSEUP=8
Star is 80 degrees from the moon. Moon is 19% illuminated.
TNO apparent brightness V=19.6

[RECON map]
TNO is 39.3 AU from the Sun and 38.6 AU from the Earth.
The TNO is moving 15.2 km/sec on the sky relative to the star, or, 2.0 arcsec/hr.
The 1-sigma error in the time of the event is 322 seconds.
The 1-sigma cross-track error in the shadow position is 2201 km.
The sky-plane scale is 27986.9 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 75.6 sec chord
Diameter=468.7 km assuming a 30% albedo -- 30.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 28978, (2019/04/30 11:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:35.7 -26:28:24  0.9 18.57  98
34Ups Sco      17:32:04.8 -37:18:34  2.7  9.27  84
3 Sgr          17:48:46.7 -27:50:11  4.2  1.77  81
PPM 267355     17:50:42.4 -29:19:10  8.4  0.68  80
PPM 267444     17:53:37.3 -29:05:59  9.2  0.13  80
28978          17:53:48.7 -29:13:19 11.6        79
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 2.8 sigma about the mid-time.
The median site spacing is 14.4 km RECON observability=0.5 and success probability=6.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:27:21 -10.9 CT Down 11.8 182.1 Really Low 11:12:21 - 11:42:21 1251
Tonasket 11:27:21 -11.1 CT Down 12.1 182.1 Really Low 11:12:21 - 11:42:21 1245
Okanogan 11:27:22 -11.3 CT Down 12.4 182.0 Really Low 11:12:22 - 11:42:22 1240
Manson/Chelan 11:27:25 -11.9 CT Down 12.9 181.5 Really Low 11:12:25 - 11:42:25 1239
Brewster 11:27:23 -11.6 CT Down 12.7 181.8 Really Low 11:12:23 - 11:42:23 1237
Entiat 11:27:25 -12.1 AT Down 13.1 181.4 Really Low 11:12:25 - 11:42:25 1235
Wenatchee 11:27:25 -12.3 AT Down 13.4 181.4 Really Low 11:12:25 - 11:42:25 1230
Ellensburg 11:27:27 -12.7 AT Down 13.8 181.2 Really Low 11:12:27 - 11:42:27 1224
Yakima 11:27:26 -13.0 AT Down 14.2 181.1 Really Low 11:12:26 - 11:42:26 1213
Toppenish/White Swan 11:27:26 -13.0 AT Down 14.4 181.3 Really Low 11:12:26 - 11:42:26 1204
The Dalles 11:27:30 -13.9 AT Down 15.2 180.6 Really Low 11:12:30 - 11:42:30 1197
Goldendale 11:27:28 -13.6 AT Down 15.0 180.9 Really Low 11:12:28 - 11:42:28 1197
Maupin 11:27:30 -14.1 AT Down 15.6 180.7 Really Low 11:12:30 - 11:42:30 1183
Pasco 11:27:20 -12.4 AT Up 14.5 182.4 Really Low 11:12:20 - 11:42:20 1176
George/Umatilla 11:27:21 -12.7 AT Up 14.8 182.2 Really Low 11:12:21 - 11:42:21 1171
Madras/Culver 11:27:30 -14.5 AT Down 16.1 180.7 Really Low 11:12:30 - 11:42:30 1168
Sisters 11:27:33 -14.9 AT Down 16.5 180.3 Really Low 11:12:33 - 11:42:33 1167
PNWRO 11:27:19 -12.4 AT Up 14.7 182.6 Really Low 11:12:19 - 11:42:19 1165
Redmond 11:27:31 -14.7 AT Down 16.5 180.6 Really Low 11:12:31 - 11:42:31 1158
Bend 11:27:32 -14.9 AT Down 16.7 180.5 Really Low 11:12:32 - 11:42:32 1154
Oregon Observatory 11:27:32 -15.1 AT Down 16.9 180.4 Really Low 11:12:32 - 11:42:32 1152
La Pine/Gilchrist 11:27:33 -15.3 AT Down 17.1 180.3 Really Low 11:12:33 - 11:42:33 1146
North Lake 11:27:29 -15.2 AT Down 17.5 180.9 Really Low 11:12:29 - 11:42:29 1121
Chiloquin 11:27:35 -16.2 AT Down 18.2 180.0 Really Low 11:12:35 - 11:42:35 1117
Klamath Falls 11:27:35 -16.3 AT Down 18.6 180.1 Really Low 11:12:35 - 11:42:35 1103
Paisley 11:27:28 -15.3 AT Up 18.1 181.2 Really Low 11:12:28 - 11:42:28 1095
Tulelake 11:27:33 -16.3 AT Down 18.8 180.4 Really Low 11:12:33 - 11:42:33 1088
Lakeview 11:27:27 -15.5 AT Up 18.6 181.4 Really Low 11:12:27 - 11:42:27 1074
Fall River/Burney 11:27:33 -16.9 AT Up 19.7 180.4 Really Low 11:12:33 - 11:42:33 1054
Cedarville 11:27:26 -15.8 AT Up 19.2 181.5 Really Low 11:12:26 - 11:42:26 1047
Susanville 11:27:29 -16.8 AT Up 20.4 181.1 Low 11:12:29 - 11:42:29 1015
Greenville 11:27:31 -17.1 AT Up 20.6 180.8 Low 11:12:31 - 11:42:31 1011
Gimple 11:27:31 -17.1 AT Up 20.6 180.9 Low 11:12:31 - 11:42:31 1009
Quincy 11:27:31 -17.3 AT Up 20.8 180.8 Low 11:12:31 - 11:42:31 1003
Portola 11:27:29 -17.1 AT Up 21.0 181.3 Low 11:12:29 - 11:42:29 988
Reno 11:27:26 -16.8 AT Up 21.2 181.9 Low 11:12:26 - 11:42:26 964
Carson City 11:27:26 -17.0 AT Up 21.6 181.9 Low 11:12:26 - 11:42:26 949
Gardnerville 11:27:26 -17.1 AT Up 21.8 182.0 Low 11:12:26 - 11:42:26 938
Yerington 11:27:22 -16.7 AT Up 21.7 182.5 Low 11:12:22 - 11:42:22 928
Hawthorne 11:27:20 -16.7 AT Up 22.2 183.0 Low 11:12:20 - 11:42:20 897
Lee Vining 11:27:23 -17.3 AT Up 22.8 182.6 Low 11:12:23 - 11:42:23 884
Tonopah 11:27:12 -16.1 AT Up 22.6 184.3 Low 11:12:12 - 11:42:12 845
Bishop 11:27:19 -17.2 AT Up 23.3 183.2 Low 11:12:19 - 11:42:19 841
Lone Pine 11:27:18 -17.4 AT Up 24.1 183.6 Low 11:12:18 - 11:42:18 800
CPSLO 11:27:33 -19.9 Dark Up 25.5 181.2 Low 11:12:33 - 11:42:33 798
Beatty 11:27:11 -16.4 AT Up 23.7 184.8 Low 11:12:11 - 11:42:11 782
Indian Springs 11:27:04 -15.9 AT Up 24.0 185.8 Low 11:12:04 - 11:42:04 741
Henderson 11:27:01 -15.7 AT Up 24.4 186.5 Low 11:12:01 - 11:42:01 698
Wildwood 11:27:22 -19.2 Dark Up 26.6 183.1 Low 11:12:22 - 11:42:22 693
Searchlight/Boulder City 11:27:00 -16.0 AT Up 25.0 186.6 Low 11:12:00 - 11:42:00 669
Laughlin/Bullhead City 11:26:58 -15.9 AT Up 25.3 186.9 Low 11:11:58 - 11:41:58 645
Patrick 11:26:55 -15.3 AT Up 24.9 187.5 Low 11:11:55 - 11:41:55 639
Kingman/Dolan Springs 11:26:56 -15.5 AT Up 25.2 187.4 Low 11:11:56 - 11:41:56 633
Mohave Valley 11:26:59 -16.0 AT Up 25.5 186.9 Low 11:11:59 - 11:41:59 631
Idyllwild 11:27:11 -18.1 Dark Up 26.9 185.0 Low 11:12:11 - 11:42:11 630
Niwot 11:26:10 -7.1 CT Up 19.0 195.1 Really Low 11:11:10 - 11:41:10 610
Lake Havasu City 11:26:57 -16.1 AT Up 25.9 187.2 Low 11:11:57 - 11:41:57 605
DCO 11:26:51 -15.0 AT Up 25.2 188.2 Low 11:11:51 - 11:41:51 605
Parker 11:26:57 -16.2 AT Up 26.3 187.2 Low 11:11:57 - 11:41:57 587
Blythe 11:26:59 -16.7 AT Up 26.8 187.0 Low 11:11:59 - 11:41:59 568
Calipatria 11:27:05 -17.6 AT Up 27.4 186.1 Low 11:12:05 - 11:42:05 567
Yuma 11:27:00 -17.2 AT Up 27.7 187.0 Low 11:12:00 - 11:42:00 521

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, (2019/04/30 11:29UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:55  0.9 18.57  98
34Ups Sco      17:30:45.8 -37:17:46  2.7  9.27  84
3 Sgr          17:47:33.6 -27:49:51  4.2  1.77  81
PPM 267355     17:49:28.5 -29:18:54  8.4  0.68  80
PPM 267444     17:52:23.6 -29:05:47  9.2  0.13  80
28978          17:52:34.8 -29:13:08 11.6        80
Positions are for J2000

Event circumstances last updated at 2017/05/01 17:21:41 UT

Marc W. Buie, Southwest Research Institute

RECON