RECON: TNO occultation with 28978

Event between (28978) Ixion and star UC4-304-143317 with event index number of 191369

Geocentric closest approach at 2019/05/24 09:59:06 UTC

J2000 position of star is 17:50:48.4 -29:16:53
Equinox of date position of star is 17:51:57.0 -29:17:06
Stellar brightness R=15.8, use SENSEUP=128
Star is 40 degrees from the moon. Moon is 71% illuminated.
TNO apparent brightness V=19.6

[RECON map]
TNO is 39.2 AU from the Sun and 38.3 AU from the Earth.
The TNO is moving 22.2 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 207 seconds.
The 1-sigma cross-track error in the shadow position is 2275 km.
The sky-plane scale is 27797.0 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 51.7 sec chord
Diameter=468.7 km assuming a 30% albedo -- 21.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 28978, (2019/05/24 09:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:36.0 -26:28:24  0.9 18.19  58
34Ups Sco      17:32:05.1 -37:18:34  2.7  9.04  45
3 Sgr          17:48:46.9 -27:50:11  4.2  1.62  41
PPM 267355     17:50:42.6 -29:19:10  8.4  0.29  41
PPM 267393     17:51:55.2 -29:16:59  8.7  0.03  40
28978          17:52:02.6 -29:17:07 15.8        40
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 4.4 sigma about the mid-time.
The median site spacing is 12.3 km RECON observability=0.5 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Oroville 09:58:23 -15.1 AT Up 11.7 183.7 Really Low 09:43:23 - 10:13:23 9579
Tonasket 09:58:23 -15.3 AT Up 11.9 183.7 Really Low 09:43:23 - 10:13:23 9574
Okanogan 09:58:24 -15.6 AT Up 12.3 183.6 Really Low 09:43:24 - 10:13:24 9567
Brewster 09:58:24 -15.9 AT Up 12.5 183.4 Really Low 09:43:24 - 10:13:24 9563
Manson/Chelan 09:58:25 -16.2 AT Up 12.8 183.1 Really Low 09:43:25 - 10:13:25 9561
Entiat 09:58:26 -16.4 AT Up 13.0 183.0 Really Low 09:43:26 - 10:13:26 9557
Wenatchee 09:58:26 -16.7 AT Up 13.3 183.0 Really Low 09:43:26 - 10:13:26 9551
Ellensburg 09:58:27 -17.1 AT Up 13.7 182.8 Really Low 09:43:27 - 10:13:27 9542
Yakima 09:58:26 -17.5 AT Up 14.1 182.8 Really Low 09:43:26 - 10:13:26 9532
Toppenish/White Swan 09:58:26 -17.6 AT Up 14.3 182.9 Really Low 09:43:26 - 10:13:26 9524
Goldendale 09:58:27 -18.2 Dark Up 14.9 182.5 Really Low 09:43:27 - 10:13:27 9513
The Dalles 09:58:29 -18.5 Dark Up 15.1 182.2 Really Low 09:43:29 - 10:13:29 9510
Pasco 09:58:21 -17.3 AT Up 14.4 184.0 Really Low 09:43:21 - 10:13:21 9507
George/Umatilla 09:58:23 -17.6 AT Up 14.7 183.8 Really Low 09:43:23 - 10:13:23 9500
PNWRO 09:58:21 -17.4 AT Up 14.6 184.2 Really Low 09:43:21 - 10:13:21 9497
Maupin 09:58:28 -18.9 Dark Up 15.5 182.3 Really Low 09:43:28 - 10:13:28 9496
Madras/Culver 09:58:28 -19.4 Dark Up 16.1 182.3 Really Low 09:43:28 - 10:13:28 9480
Sisters 09:58:30 -19.8 Dark Up 16.4 181.9 Really Low 09:43:30 - 10:13:30 9474
Redmond 09:58:29 -19.7 Dark Up 16.4 182.2 Really Low 09:43:29 - 10:13:29 9469
Bend 09:58:29 -19.9 Dark Up 16.6 182.1 Really Low 09:43:29 - 10:13:29 9464
Oregon Observatory 09:58:30 -20.1 Dark Up 16.8 182.0 Really Low 09:43:30 - 10:13:30 9460
La Pine/Gilchrist 09:58:30 -20.3 Dark Up 17.0 181.9 Really Low 09:43:30 - 10:13:30 9454
North Lake 09:58:28 -20.5 Dark Up 17.4 182.5 Really Low 09:43:28 - 10:13:28 9433
Chiloquin 09:58:31 -21.4 Dark Up 18.1 181.6 Really Low 09:43:31 - 10:13:31 9420
Paisley 09:58:27 -20.8 Dark Up 18.0 182.8 Really Low 09:43:27 - 10:13:27 9410
Klamath Falls 09:58:31 -21.7 Dark Up 18.5 181.7 Really Low 09:43:31 - 10:13:31 9407
Tulelake 09:58:30 -21.8 Dark Up 18.7 182.0 Really Low 09:43:30 - 10:13:30 9394
Lakeview 09:58:25 -21.2 Dark Up 18.5 183.0 Really Low 09:43:25 - 10:13:25 9390
Cedarville 09:58:26 -21.7 Dark Up 19.1 183.2 Really Low 09:43:26 - 10:13:26 9365
Fall River/Burney 09:58:30 -22.6 Dark Up 19.6 182.1 Really Low 09:43:30 - 10:13:30 9360
Susanville 09:58:27 -22.9 Dark Up 20.2 182.8 Low 09:43:27 - 10:13:27 9328
Greenville 09:58:28 -23.2 Dark Up 20.5 182.5 Low 09:43:28 - 10:13:28 9321
Gimple 09:58:28 -23.2 Dark Up 20.5 182.6 Low 09:43:28 - 10:13:28 9320
Quincy 09:58:28 -23.4 Dark Up 20.7 182.5 Low 09:43:28 - 10:13:28 9313
Portola 09:58:26 -23.3 Dark Up 20.8 182.9 Low 09:43:26 - 10:13:26 9302
Reno 09:58:24 -23.3 Dark Up 21.1 183.5 Low 09:43:24 - 10:13:24 9284
Carson City 09:58:24 -23.6 Dark Up 21.4 183.6 Low 09:43:24 - 10:13:24 9269
Gardnerville 09:58:24 -23.8 Dark Up 21.7 183.6 Low 09:43:24 - 10:13:24 9258
Yerington 09:58:22 -23.5 Dark Up 21.6 184.2 Low 09:43:22 - 10:13:22 9253
Hawthorne 09:58:19 -23.7 Dark Up 22.0 184.7 Low 09:43:19 - 10:13:19 9227
Lee Vining 09:58:21 -24.3 Dark Up 22.6 184.2 Low 09:43:21 - 10:13:21 9209
Tonopah 09:58:14 -23.5 Dark Up 22.4 186.0 Low 09:43:14 - 10:13:14 9188
Bishop 09:58:19 -24.5 Dark Up 23.2 184.9 Low 09:43:19 - 10:13:19 9173
Lone Pine 09:58:17 -25.0 Dark Up 23.9 185.3 Low 09:43:17 - 10:13:17 9134
Beatty 09:58:12 -24.2 Dark Up 23.5 186.5 Low 09:43:12 - 10:13:12 9130
CPSLO 09:58:28 -27.2 Dark Up 25.4 182.9 Low 09:43:28 - 10:13:28 9107
Indian Springs 09:58:08 -24.0 Dark Up 23.7 187.5 Low 09:43:08 - 10:13:08 9098
Henderson 09:58:05 -24.1 Dark Up 24.2 188.2 Low 09:43:05 - 10:13:05 9062
Niwot 09:57:31 -16.1 AT Up 18.6 196.7 Really Low 09:42:31 - 10:12:31 9060
Searchlight/Boulder City 09:58:05 -24.5 Dark Up 24.7 188.3 Low 09:43:05 - 10:13:05 9034
Wildwood 09:58:19 -27.4 Dark Up 26.4 184.9 Low 09:43:19 - 10:13:19 9022
Patrick 09:58:01 -24.1 Dark Up 24.7 189.3 Low 09:43:01 - 10:13:01 9014
Laughlin/Bullhead City 09:58:03 -24.6 Dark Up 25.0 188.6 Low 09:43:03 - 10:13:03 9014
Kingman/Dolan Springs 09:58:02 -24.3 Dark Up 24.9 189.1 Low 09:43:02 - 10:13:02 9006
Mohave Valley 09:58:03 -24.8 Dark Up 25.3 188.6 Low 09:43:03 - 10:13:03 9000
DCO 09:57:59 -24.0 Dark Up 24.9 190.0 Low 09:42:59 - 10:12:59 8986
Lake Havasu City 09:58:03 -25.0 Dark Up 25.6 188.9 Low 09:43:03 - 10:13:03 8976
Idyllwild 09:58:13 -26.8 Dark Up 26.7 186.7 Low 09:43:13 - 10:13:13 8976
Parker 09:58:03 -25.3 Dark Up 26.0 189.0 Low 09:43:03 - 10:13:03 8958
Blythe 09:58:03 -25.9 Dark Up 26.5 188.7 Low 09:43:03 - 10:13:03 8936
Calipatria 09:58:07 -26.7 Dark Up 27.1 187.9 Low 09:43:07 - 10:13:07 8926
Yuma 09:58:03 -26.6 Dark Up 27.5 188.7 Low 09:43:03 - 10:13:03 8888

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, (2019/05/24 09:59UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.19  58
34Ups Sco      17:30:45.8 -37:17:46  2.7  9.04  45
3 Sgr          17:47:33.6 -27:49:51  4.2  1.62  41
PPM 267355     17:49:28.5 -29:18:54  8.4  0.29  41
PPM 267393     17:50:41.1 -29:16:45  8.7  0.03  40
28978          17:50:48.4 -29:16:53 15.8        40
Positions are for J2000

Event circumstances last updated at 2017/12/06 18:58:28 UT

Marc W. Buie, Southwest Research Institute

RECON