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 17:51:55.0 -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 211 seconds.
The 1-sigma cross-track error in the shadow position is 2306 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 4.3 sigma about the mid-time.
The median site spacing is 12.0 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 09:58:22 -15.1 AT Up 11.7 183.7 Really Low 09:43:22 - 10:13:22 9577
Tonasket 09:58:22 -15.3 AT Up 11.9 183.7 Really Low 09:43:22 - 10:13:22 9571
Okanogan 09:58:23 -15.6 AT Up 12.3 183.6 Really Low 09:43:23 - 10:13:23 9565
Brewster 09:58:23 -15.9 AT Up 12.5 183.4 Really Low 09:43:23 - 10:13:23 9560
Manson/Chelan 09:58:24 -16.2 AT Up 12.8 183.1 Really Low 09:43:24 - 10:13:24 9559
Entiat 09:58:24 -16.4 AT Up 13.0 183.0 Really Low 09:43:24 - 10:13:24 9554
Wenatchee 09:58:25 -16.7 AT Up 13.3 183.0 Really Low 09:43:25 - 10:13:25 9548
Ellensburg 09:58:25 -17.1 AT Up 13.7 182.8 Really Low 09:43:25 - 10:13:25 9540
Yakima 09:58:26 -17.5 AT Up 14.1 182.8 Really Low 09:43:26 - 10:13:26 9529
Toppenish/White Swan 09:58:25 -17.6 AT Up 14.3 182.9 Really Low 09:43:25 - 10:13:25 9521
Goldendale 09:58:27 -18.2 Dark Up 14.9 182.5 Really Low 09:43:27 - 10:13:27 9510
The Dalles 09:58:28 -18.5 Dark Up 15.1 182.2 Really Low 09:43:28 - 10:13:28 9507
Pasco 09:58:20 -17.3 AT Up 14.4 184.0 Really Low 09:43:20 - 10:13:20 9504
George/Umatilla 09:58:21 -17.6 AT Up 14.7 183.8 Really Low 09:43:21 - 10:13:21 9496
PNWRO 09:58:20 -17.4 AT Up 14.6 184.2 Really Low 09:43:20 - 10:13:20 9494
Maupin 09:58:28 -18.9 Dark Up 15.5 182.3 Really Low 09:43:28 - 10:13:28 9494
Madras/Culver 09:58:28 -19.4 Dark Up 16.1 182.3 Really Low 09:43:28 - 10:13:28 9478
Sisters 09:58:29 -19.8 Dark Up 16.4 181.9 Really Low 09:43:29 - 10:13:29 9472
Redmond 09:58:28 -19.7 Dark Up 16.4 182.2 Really Low 09:43:28 - 10:13:28 9467
Bend 09:58:28 -19.9 Dark Up 16.6 182.1 Really Low 09:43:28 - 10:13:28 9462
Oregon Observatory 09:58:28 -20.1 Dark Up 16.8 182.0 Really Low 09:43:28 - 10:13:28 9458
La Pine/Gilchrist 09:58:29 -20.3 Dark Up 17.0 181.9 Really Low 09:43:29 - 10:13:29 9452
North Lake 09:58:27 -20.5 Dark Up 17.4 182.5 Really Low 09:43:27 - 10:13:27 9431
Chiloquin 09:58:30 -21.4 Dark Up 18.1 181.6 Really Low 09:43:30 - 10:13:30 9418
Paisley 09:58:25 -20.8 Dark Up 18.0 182.8 Really Low 09:43:25 - 10:13:25 9408
Klamath Falls 09:58:30 -21.7 Dark Up 18.5 181.7 Really Low 09:43:30 - 10:13:30 9405
Tulelake 09:58:29 -21.8 Dark Up 18.7 182.0 Really Low 09:43:29 - 10:13:29 9393
Lakeview 09:58:24 -21.2 Dark Up 18.5 183.0 Really Low 09:43:24 - 10:13:24 9389
Cedarville 09:58:24 -21.7 Dark Up 19.1 183.2 Really Low 09:43:24 - 10:13:24 9363
Fall River/Burney 09:58:28 -22.6 Dark Up 19.6 182.1 Really Low 09:43:28 - 10:13:28 9358
Susanville 09:58:25 -22.9 Dark Up 20.2 182.8 Low 09:43:25 - 10:13:25 9326
Greenville 09:58:27 -23.2 Dark Up 20.5 182.5 Low 09:43:27 - 10:13:27 9318
Gimple 09:58:27 -23.2 Dark Up 20.5 182.6 Low 09:43:27 - 10:13:27 9317
Quincy 09:58:27 -23.4 Dark Up 20.7 182.5 Low 09:43:27 - 10:13:27 9310
Portola 09:58:25 -23.3 Dark Up 20.8 182.9 Low 09:43:25 - 10:13:25 9300
Reno 09:58:22 -23.3 Dark Up 21.1 183.5 Low 09:43:22 - 10:13:22 9282
Carson City 09:58:22 -23.6 Dark Up 21.4 183.6 Low 09:43:22 - 10:13:22 9267
Gardnerville 09:58:22 -23.8 Dark Up 21.7 183.6 Low 09:43:22 - 10:13:22 9256
Yerington 09:58:20 -23.5 Dark Up 21.6 184.2 Low 09:43:20 - 10:13:20 9251
Hawthorne 09:58:18 -23.7 Dark Up 22.0 184.7 Low 09:43:18 - 10:13:18 9224
Lee Vining 09:58:20 -24.3 Dark Up 22.6 184.2 Low 09:43:20 - 10:13:20 9207
Tonopah 09:58:12 -23.5 Dark Up 22.4 186.0 Low 09:43:12 - 10:13:12 9185
Bishop 09:58:17 -24.6 Dark Up 23.2 184.9 Low 09:43:17 - 10:13:17 9171
Lone Pine 09:58:16 -25.0 Dark Up 23.9 185.3 Low 09:43:16 - 10:13:16 9132
Beatty 09:58:10 -24.2 Dark Up 23.5 186.5 Low 09:43:10 - 10:13:10 9126
CPSLO 09:58:26 -27.2 Dark Up 25.4 182.9 Low 09:43:26 - 10:13:26 9104
Indian Springs 09:58:07 -24.0 Dark Up 23.7 187.5 Low 09:43:07 - 10:13:07 9095
Henderson 09:58:05 -24.1 Dark Up 24.2 188.2 Low 09:43:05 - 10:13:05 9058
Niwot 09:57:30 -16.1 AT Up 18.6 196.7 Really Low 09:42:30 - 10:12:30 9056
Searchlight/Boulder City 09:58:05 -24.5 Dark Up 24.7 188.3 Low 09:43:05 - 10:13:05 9030
Wildwood 09:58:18 -27.4 Dark Up 26.4 184.9 Low 09:43:18 - 10:13:18 9018
Patrick 09:58:00 -24.1 Dark Up 24.7 189.3 Low 09:43:00 - 10:13:00 9010
Laughlin/Bullhead City 09:58:02 -24.6 Dark Up 25.0 188.6 Low 09:43:02 - 10:13:02 9009
Kingman/Dolan Springs 09:58:02 -24.3 Dark Up 24.9 189.1 Low 09:43:02 - 10:13:02 9002
Mohave Valley 09:58:02 -24.8 Dark Up 25.3 188.6 Low 09:43:02 - 10:13:02 8995
DCO 09:57:57 -24.0 Dark Up 24.9 189.9 Low 09:42:57 - 10:12:57 8982
Idyllwild 09:58:10 -26.8 Dark Up 26.7 186.7 Low 09:43:10 - 10:13:10 8973
Lake Havasu City 09:58:02 -25.0 Dark Up 25.6 188.9 Low 09:43:02 - 10:13:02 8971
Parker 09:58:02 -25.3 Dark Up 26.0 189.0 Low 09:43:02 - 10:13:02 8953
Blythe 09:58:02 -25.9 Dark Up 26.5 188.7 Low 09:43:02 - 10:13:02 8931
Calipatria 09:58:06 -26.7 Dark Up 27.1 187.9 Low 09:43:06 - 10:13:06 8921
Yuma 09:58:02 -26.6 Dark Up 27.5 188.7 Low 09:43:02 - 10:13:02 8883

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 2017/06/01 18:16:04 UT

Marc W. Buie, Southwest Research Institute

RECON