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 11:29:09 UTC

J2000 position of star is 17:52:34.8 -29:13:08
Equinox of date position of star is 17:53:43.3 -29:13:19
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 309 seconds.
The 1-sigma cross-track error in the shadow position is 2143 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 -- 30.8 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 2.9 sigma about the mid-time.
The median site spacing is 14.6 km RECON observability=0.5 and success probability=6.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 11:27:22 -10.9 CT Down 11.8 182.1 Really Low 11:12:22 - 11:42:22 1256
Tonasket 11:27:22 -11.1 CT Down 12.1 182.1 Really Low 11:12:22 - 11:42:22 1250
Okanogan 11:27:23 -11.3 CT Down 12.4 182.0 Really Low 11:12:23 - 11:42:23 1245
Manson/Chelan 11:27:26 -11.9 CT Down 12.9 181.5 Really Low 11:12:26 - 11:42:26 1244
Brewster 11:27:24 -11.6 CT Down 12.7 181.8 Really Low 11:12:24 - 11:42:24 1242
Entiat 11:27:26 -12.1 AT Down 13.1 181.4 Really Low 11:12:26 - 11:42:26 1240
Wenatchee 11:27:27 -12.3 AT Down 13.4 181.4 Really Low 11:12:27 - 11:42:27 1235
Ellensburg 11:27:29 -12.7 AT Down 13.8 181.2 Really Low 11:12:29 - 11:42:29 1229
Yakima 11:27:28 -13.0 AT Down 14.2 181.2 Really Low 11:12:28 - 11:42:28 1218
Toppenish/White Swan 11:27:28 -13.0 AT Down 14.4 181.3 Really Low 11:12:28 - 11:42:28 1209
The Dalles 11:27:32 -13.9 AT Down 15.2 180.6 Really Low 11:12:32 - 11:42:32 1202
Goldendale 11:27:30 -13.6 AT Down 15.0 180.9 Really Low 11:12:30 - 11:42:30 1202
Maupin 11:27:32 -14.1 AT Down 15.6 180.7 Really Low 11:12:32 - 11:42:32 1188
Pasco 11:27:21 -12.4 AT Up 14.5 182.4 Really Low 11:12:21 - 11:42:21 1182
George/Umatilla 11:27:23 -12.7 AT Up 14.8 182.2 Really Low 11:12:23 - 11:42:23 1177
Madras/Culver 11:27:32 -14.5 AT Down 16.1 180.7 Really Low 11:12:32 - 11:42:32 1173
Sisters 11:27:34 -14.9 AT Down 16.5 180.3 Really Low 11:12:34 - 11:42:34 1171
PNWRO 11:27:21 -12.4 AT Up 14.7 182.6 Really Low 11:12:21 - 11:42:21 1170
Redmond 11:27:32 -14.7 AT Down 16.5 180.6 Really Low 11:12:32 - 11:42:32 1163
Bend 11:27:33 -14.9 AT Down 16.7 180.5 Really Low 11:12:33 - 11:42:33 1159
Oregon Observatory 11:27:34 -15.1 AT Down 16.9 180.4 Really Low 11:12:34 - 11:42:34 1156
La Pine/Gilchrist 11:27:34 -15.3 AT Down 17.1 180.3 Really Low 11:12:34 - 11:42:34 1150
North Lake 11:27:32 -15.2 AT Down 17.5 180.9 Really Low 11:12:32 - 11:42:32 1125
Chiloquin 11:27:36 -16.2 AT Down 18.2 180.0 Really Low 11:12:36 - 11:42:36 1121
Klamath Falls 11:27:36 -16.3 AT Down 18.6 180.1 Really Low 11:12:36 - 11:42:36 1108
Paisley 11:27:30 -15.3 AT Up 18.1 181.2 Really Low 11:12:30 - 11:42:30 1100
Tulelake 11:27:35 -16.3 AT Down 18.8 180.4 Really Low 11:12:35 - 11:42:35 1092
Lakeview 11:27:29 -15.5 AT Up 18.6 181.4 Really Low 11:12:29 - 11:42:29 1078
Fall River/Burney 11:27:35 -16.8 AT Up 19.7 180.4 Really Low 11:12:35 - 11:42:35 1058
Cedarville 11:27:28 -15.8 AT Up 19.2 181.5 Really Low 11:12:28 - 11:42:28 1051
Susanville 11:27:32 -16.8 AT Up 20.4 181.1 Low 11:12:32 - 11:42:32 1020
Greenville 11:27:33 -17.1 AT Up 20.6 180.9 Low 11:12:33 - 11:42:33 1016
Gimple 11:27:33 -17.1 AT Up 20.6 180.9 Low 11:12:33 - 11:42:33 1014
Quincy 11:27:33 -17.3 AT Up 20.8 180.9 Low 11:12:33 - 11:42:33 1008
Portola 11:27:31 -17.0 AT Up 21.0 181.3 Low 11:12:31 - 11:42:31 993
Reno 11:27:27 -16.8 AT Up 21.2 181.9 Low 11:12:27 - 11:42:27 969
Carson City 11:27:27 -17.0 AT Up 21.6 181.9 Low 11:12:27 - 11:42:27 954
Gardnerville 11:27:27 -17.1 AT Up 21.8 182.0 Low 11:12:27 - 11:42:27 943
Yerington 11:27:24 -16.7 AT Up 21.7 182.5 Low 11:12:24 - 11:42:24 933
Hawthorne 11:27:22 -16.7 AT Up 22.2 183.0 Low 11:12:22 - 11:42:22 902
Lee Vining 11:27:25 -17.3 AT Up 22.8 182.6 Low 11:12:25 - 11:42:25 889
Tonopah 11:27:14 -16.1 AT Up 22.6 184.3 Low 11:12:14 - 11:42:14 850
Bishop 11:27:20 -17.2 AT Up 23.3 183.2 Low 11:12:20 - 11:42:20 847
Lone Pine 11:27:19 -17.4 AT Up 24.1 183.6 Low 11:12:19 - 11:42:19 805
CPSLO 11:27:34 -19.8 Dark Up 25.5 181.2 Low 11:12:34 - 11:42:34 804
Beatty 11:27:12 -16.4 AT Up 23.7 184.8 Low 11:12:12 - 11:42:12 788
Indian Springs 11:27:06 -15.9 AT Up 24.0 185.8 Low 11:12:06 - 11:42:06 747
Henderson 11:27:02 -15.7 AT Up 24.4 186.5 Low 11:12:02 - 11:42:02 705
Wildwood 11:27:23 -19.2 Dark Up 26.6 183.1 Low 11:12:23 - 11:42:23 700
Searchlight/Boulder City 11:27:02 -16.0 AT Up 25.0 186.6 Low 11:12:02 - 11:42:02 676
Laughlin/Bullhead City 11:27:00 -15.9 AT Up 25.3 186.9 Low 11:12:00 - 11:42:00 652
Patrick 11:26:56 -15.3 AT Up 24.9 187.6 Low 11:11:56 - 11:41:56 646
Kingman/Dolan Springs 11:26:57 -15.5 AT Up 25.2 187.4 Low 11:11:57 - 11:41:57 640
Mohave Valley 11:27:00 -16.0 AT Up 25.5 186.9 Low 11:12:00 - 11:42:00 639
Idyllwild 11:27:13 -18.1 Dark Up 26.9 185.0 Low 11:12:13 - 11:42:13 636
Niwot 11:26:11 -7.1 CT Up 19.0 195.1 Really Low 11:11:11 - 11:41:11 616
Lake Havasu City 11:26:59 -16.1 AT Up 25.9 187.2 Low 11:11:59 - 11:41:59 612
DCO 11:26:53 -14.9 AT Up 25.2 188.2 Low 11:11:53 - 11:41:53 612
Parker 11:26:59 -16.2 AT Up 26.2 187.2 Low 11:11:59 - 11:41:59 594
Blythe 11:27:01 -16.7 AT Up 26.8 187.0 Low 11:12:01 - 11:42:01 575
Calipatria 11:27:06 -17.6 AT Up 27.4 186.1 Low 11:12:06 - 11:42:06 575
Yuma 11:27:01 -17.2 AT Up 27.7 187.0 Low 11:12:01 - 11:42:01 528

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 -26:25:56  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 2017/12/06 18:53:27 UT

Marc W. Buie, Southwest Research Institute

RECON