RECON: TNO occultation with 28978

Event between (28978) Ixion and star UC4-306-135848 with event index number of 128137

Geocentric closest approach at 2018/06/13 09:16:22 UTC

J2000 position of star is 17:42:37.9 -28:48:32
Equinox of date position of star is 17:43:46.2 -28:48:58
Stellar brightness R=16.5, use SENSEUP=128
Star is 166 degrees from the moon. Moon is 0% illuminated.
TNO apparent brightness V=19.5

[RECON map]
TNO is 39.5 AU from the Sun and 38.5 AU from the Earth.
The TNO is moving 24.9 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 185 seconds.
The 1-sigma cross-track error in the shadow position is 2266 km.
The sky-plane scale is 27895.3 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 46.0 sec chord
Diameter=468.7 km assuming a 30% albedo -- 18.8 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 28978, (2018/06/13 09:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:32.5 -26:28:17  0.9 16.38 169
34Ups Sco      17:32:01.2 -37:18:32  2.7  8.84 160
3 Sgr          17:48:43.4 -27:50:10  4.2  1.46 166
PPM 267171     17:43:42.9 -28:19:15  8.3  0.50 167
PPM 267172     17:43:46.7 -28:46:17  9.5  0.05 166
28978          17:43:48.2 -28:48:59 16.5       166
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 4.9 sigma about the mid-time.
The median site spacing is 14.7 km RECON observability=0.5 and success probability=0.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:15:29 -15.8 AT Down 11.0 193.7 Really Low 09:00:29 - 09:30:29 10638
Tonasket 09:15:28 -16.0 AT Down 11.3 193.7 Really Low 09:00:28 - 09:30:28 10632
Okanogan 09:15:28 -16.4 AT Down 11.6 193.6 Really Low 09:00:28 - 09:30:28 10625
Brewster 09:15:29 -16.7 AT Down 11.9 193.5 Really Low 09:00:29 - 09:30:29 10620
Manson/Chelan 09:15:29 -16.9 AT Down 12.2 193.1 Really Low 09:00:29 - 09:30:29 10619
Entiat 09:15:30 -17.2 AT Down 12.4 193.1 Really Low 09:00:30 - 09:30:30 10614
Wenatchee 09:15:30 -17.4 AT Down 12.7 193.0 Really Low 09:00:30 - 09:30:30 10608
Ellensburg 09:15:30 -17.9 AT Down 13.1 192.8 Really Low 09:00:30 - 09:30:30 10598
Yakima 09:15:30 -18.3 Dark Down 13.5 192.9 Really Low 09:00:30 - 09:30:30 10586
Toppenish/White Swan 09:15:29 -18.4 Dark Down 13.7 193.0 Really Low 09:00:29 - 09:30:29 10578
Goldendale 09:15:30 -19.0 Dark Down 14.3 192.7 Really Low 09:00:30 - 09:30:30 10566
The Dalles 09:15:31 -19.3 Dark Down 14.6 192.4 Really Low 09:00:31 - 09:30:31 10563
Pasco 09:15:26 -18.3 Dark Down 13.6 194.1 Really Low 09:00:26 - 09:30:26 10559
George/Umatilla 09:15:26 -18.6 Dark Down 14.0 194.0 Really Low 09:00:26 - 09:30:26 10551
Maupin 09:15:30 -19.7 Dark Down 15.0 192.5 Really Low 09:00:30 - 09:30:30 10549
PNWRO 09:15:25 -18.5 Dark Down 13.8 194.3 Really Low 09:00:25 - 09:30:25 10548
Madras/Culver 09:15:30 -20.2 Dark Down 15.5 192.5 Really Low 09:00:30 - 09:30:30 10531
Sisters 09:15:31 -20.7 Dark Down 15.9 192.1 Really Low 09:00:31 - 09:30:31 10525
Redmond 09:15:30 -20.6 Dark Down 15.9 192.4 Really Low 09:00:30 - 09:30:30 10520
Bend 09:15:30 -20.8 Dark Down 16.1 192.3 Really Low 09:00:30 - 09:30:30 10514
Oregon Observatory 09:15:31 -21.0 Dark Down 16.3 192.2 Really Low 09:00:31 - 09:30:31 10510
La Pine/Gilchrist 09:15:31 -21.2 Dark Down 16.5 192.2 Really Low 09:00:31 - 09:30:31 10503
North Lake 09:15:29 -21.5 Dark Down 16.8 192.7 Really Low 09:00:29 - 09:30:29 10480
Chiloquin 09:15:31 -22.4 Dark Down 17.6 191.9 Really Low 09:00:31 - 09:30:31 10467
Paisley 09:15:27 -22.0 Dark Down 17.3 193.1 Really Low 09:00:27 - 09:30:27 10456
Klamath Falls 09:15:31 -22.7 Dark Down 17.9 192.0 Really Low 09:00:31 - 09:30:31 10454
Tulelake 09:15:30 -22.9 Dark Down 18.2 192.3 Really Low 09:00:30 - 09:30:30 10440
Lakeview 09:15:26 -22.4 Dark Down 17.8 193.3 Really Low 09:00:26 - 09:30:26 10434
Cedarville 09:15:25 -23.0 Dark Down 18.4 193.5 Really Low 09:00:25 - 09:30:25 10407
Fall River/Burney 09:15:29 -23.7 Dark Down 19.0 192.5 Really Low 09:00:29 - 09:30:29 10403
Susanville 09:15:26 -24.2 Dark Down 19.5 193.2 Really Low 09:00:26 - 09:30:26 10368
Greenville 09:15:27 -24.5 Dark Down 19.9 192.9 Really Low 09:00:27 - 09:30:27 10361
Gimple 09:15:26 -24.5 Dark Down 19.8 193.0 Really Low 09:00:26 - 09:30:26 10360
Quincy 09:15:27 -24.7 Dark Down 20.0 192.9 Low 09:00:27 - 09:30:27 10352
Portola 09:15:25 -24.7 Dark Down 20.1 193.4 Low 09:00:25 - 09:30:25 10341
Reno 09:15:23 -24.8 Dark Down 20.2 194.0 Low 09:00:23 - 09:30:23 10321
Carson City 09:15:23 -25.1 Dark Down 20.6 194.0 Low 09:00:23 - 09:30:23 10305
Gardnerville 09:15:22 -25.3 Dark Down 20.8 194.1 Low 09:00:22 - 09:30:22 10294
Yerington 09:15:21 -25.1 Dark Down 20.6 194.6 Low 09:00:21 - 09:30:21 10288
Hawthorne 09:15:18 -25.4 Dark Down 21.0 195.2 Low 09:00:18 - 09:30:18 10259
Lee Vining 09:15:19 -26.1 Dark Down 21.6 194.8 Low 09:00:19 - 09:30:19 10241
Tonopah 09:15:14 -25.5 Dark Down 21.1 196.5 Low 09:00:14 - 09:30:14 10217
Bishop 09:15:17 -26.4 Dark Down 22.1 195.5 Low 09:00:17 - 09:30:17 10203
Lone Pine 09:15:15 -27.1 Dark Down 22.7 195.9 Low 09:00:15 - 09:30:15 10162
Beatty 09:15:12 -26.4 Dark Down 22.1 197.0 Low 09:00:12 - 09:30:12 10155
CPSLO 09:15:23 -29.0 Dark Down 24.5 193.6 Low 09:00:23 - 09:30:23 10136
Indian Springs 09:15:07 -26.4 Dark Down 22.2 198.0 Low 09:00:07 - 09:30:07 10121
Henderson 09:15:05 -26.6 Dark Down 22.5 198.7 Low 09:00:05 - 09:30:05 10083
Niwot 09:14:38 -19.4 Dark Down 15.8 206.6 Really Low 08:59:38 - 09:29:38 10077
Searchlight/Boulder City 09:15:04 -27.1 Dark Down 23.1 198.8 Low 09:00:04 - 09:30:04 10053
Wildwood 09:15:16 -29.6 Dark Down 25.3 195.7 Low 09:00:16 - 09:30:16 10044
Laughlin/Bullhead City 09:15:02 -27.3 Dark Down 23.3 199.2 Low 09:00:02 - 09:30:02 10032
Patrick 09:15:00 -26.8 Dark Down 22.8 199.8 Low 09:00:00 - 09:30:00 10031
Kingman/Dolan Springs 09:15:01 -27.1 Dark Down 23.1 199.7 Low 09:00:01 - 09:30:01 10023
Mohave Valley 09:15:03 -27.5 Dark Down 23.5 199.2 Low 09:00:03 - 09:30:03 10018
DCO 09:14:58 -26.8 Dark Down 22.9 200.5 Low 08:59:58 - 09:29:58 10002
Idyllwild 09:15:08 -29.3 Dark Down 25.2 197.5 Low 09:00:08 - 09:30:08 9994
Lake Havasu City 09:15:01 -27.8 Dark Down 23.8 199.5 Low 09:00:01 - 09:30:01 9992
Parker 09:15:01 -28.1 Dark Down 24.1 199.6 Low 09:00:01 - 09:30:01 9973
Blythe 09:15:01 -28.7 Dark Down 24.7 199.4 Low 09:00:01 - 09:30:01 9951
Calipatria 09:15:05 -29.5 Dark Down 25.4 198.6 Low 09:00:05 - 09:30:05 9941
Yuma 09:15:01 -29.5 Dark Down 25.6 199.5 Low 09:00:01 - 09:30:01 9901

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, (2018/06/13 09:16UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.38 169
34Ups Sco      17:30:45.8 -37:17:46  2.7  8.84 160
3 Sgr          17:47:33.6 -27:49:51  4.2  1.46 166
PPM 267171     17:42:32.9 -28:18:48  8.3  0.50 167
PPM 267172     17:42:36.5 -28:45:50  9.5  0.05 166
28978          17:42:37.9 -28:48:32 16.5       166
Positions are for J2000

Event circumstances last updated at 2017/12/04 18:44:22 UT

Marc W. Buie, Southwest Research Institute

RECON