RECON: TNO occultation with 28978

Event between (28978) Ixion and star GA0600:30331413 with event index number of 254517

Geocentric closest approach at 2020/04/05 12:08:00 UTC

J2000 position of star is 17:59:49.1 -29:36:22
Equinox of date position of star is 18:01:03.6 -29:36:21
Stellar brightness G=14.8, use SENSEUP=128
Star is 111 degrees from the moon. Moon is 90% illuminated.
TNO apparent brightness V=19.7

[RECON map]
TNO is 39.0 AU from the Sun and 38.7 AU from the Earth.
The TNO is moving 5.6 km/sec on the sky relative to the star, or, 0.7 arcsec/hr.
The 1-sigma error in the time of the event is 629 seconds.
The 1-sigma cross-track error in the shadow position is 5656 km.
The sky-plane scale is 28097.2 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 204.9 sec chord
Diameter=468.7 km assuming a 30% albedo -- 83.7 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 28978, (2020/04/05 12:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:39.2 -26:28:31  0.9 20.17  91
34Ups Sco      17:32:08.6 -37:18:36  2.7  9.78 106
Gam1Sgr        18:06:18.9 -29:34:38  4.7  1.13 112
PPM 267678     18:02:30.4 -29:26:37  7.9  0.34 111
PPM 267621     18:00:39.8 -29:29:01  9.2  0.16 111
28978          18:01:06.8 -29:36:21 14.8       111
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 1.4 sigma about the mid-time.
The median site spacing is 20.5 km RECON observability=0.3 and success probability=1.8%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Chiloquin 11:56:54 -19.1 Dark Up 15.9 163.5 Really Low 11:41:54 - 12:11:54 6282
Klamath Falls 11:56:58 -19.2 Dark Up 16.2 163.5 Really Low 11:41:58 - 12:11:58 6276
Sisters 11:56:40 -18.1 Dark Up 14.3 163.8 Really Low 11:41:40 - 12:11:40 6269
La Pine/Gilchrist 11:56:33 -18.4 Dark Up 14.9 163.8 Really Low 11:41:33 - 12:11:33 6265
Oregon Observatory 11:56:33 -18.2 Dark Up 14.7 163.9 Really Low 11:41:33 - 12:11:33 6262
Tulelake 11:56:51 -19.1 Dark Up 16.5 163.7 Really Low 11:41:51 - 12:11:51 6259
Bend 11:56:36 -18.1 Dark Up 14.5 164.0 Really Low 11:41:36 - 12:11:36 6255
Fall River/Burney 11:57:03 -19.5 Dark Up 17.4 163.8 Really Low 11:42:03 - 12:12:03 6250
The Dalles 11:56:25 -17.3 AT Up 13.1 164.2 Really Low 11:41:25 - 12:11:25 6248
Redmond 11:56:39 -17.9 AT Up 14.4 164.1 Really Low 11:41:39 - 12:11:39 6248
Madras/Culver 11:56:26 -17.7 AT Up 14.0 164.2 Really Low 11:41:26 - 12:11:26 6245
Maupin 11:56:19 -17.4 AT Up 13.5 164.2 Really Low 11:41:19 - 12:11:19 6243
North Lake 11:56:43 -18.2 Dark Up 15.4 164.3 Really Low 11:41:43 - 12:11:43 6232
Goldendale 11:56:23 -16.9 AT Up 12.9 164.5 Really Low 11:41:23 - 12:11:23 6229
Greenville 11:57:07 -19.6 Dark Up 18.4 164.1 Really Low 11:42:07 - 12:12:07 6219
Quincy 11:57:07 -19.6 Dark Up 18.6 164.1 Really Low 11:42:07 - 12:12:07 6218
Yakima 11:56:12 -16.4 AT Up 12.2 164.7 Really Low 11:41:12 - 12:11:12 6215
Gimple 11:57:05 -19.5 Dark Up 18.4 164.2 Really Low 11:42:05 - 12:12:05 6214
Ellensburg 11:56:11 -16.2 AT Up 11.8 164.8 Really Low 11:41:11 - 12:11:11 6213
Paisley 11:56:37 -18.2 Dark Up 16.0 164.6 Really Low 11:41:37 - 12:11:37 6211
Toppenish/White Swan 11:56:15 -16.4 AT Up 12.5 164.9 Really Low 11:41:15 - 12:11:15 6206
Susanville 11:57:00 -19.3 Dark Up 18.2 164.4 Really Low 11:42:00 - 12:12:00 6204
Wenatchee 11:55:58 -15.9 AT Up 11.5 164.9 Really Low 11:40:58 - 12:10:58 6200
Lakeview 11:56:44 -18.3 Dark Up 16.5 164.7 Really Low 11:41:44 - 12:11:44 6198
Entiat 11:56:04 -15.7 AT Up 11.2 165.1 Really Low 11:41:04 - 12:11:04 6195
Manson/Chelan 11:55:56 -15.6 AT Up 11.0 165.1 Really Low 11:40:56 - 12:10:56 6191
Portola 11:57:03 -19.4 Dark Up 18.8 164.5 Really Low 11:42:03 - 12:12:03 6189
Cedarville 11:56:46 -18.5 Dark Up 17.2 164.8 Really Low 11:41:46 - 12:11:46 6184
Brewster 11:55:54 -15.3 AT Up 10.9 165.4 Really Low 11:40:54 - 12:10:54 6171
Okanogan 11:55:51 -15.1 AT Up 10.7 165.6 Really Low 11:40:51 - 12:10:51 6160
Summerland 11:55:43 -14.5 AT Up 9.5 165.5 Really Low 11:40:43 - 12:10:43 6158
Okanagan Falls 11:55:43 -14.6 AT Up 9.7 165.6 Really Low 11:40:43 - 12:10:43 6155
Oliver 11:55:42 -14.7 AT Up 9.9 165.6 Really Low 11:40:42 - 12:10:42 6155
Penticton 11:55:37 -14.5 AT Up 9.5 165.6 Really Low 11:40:37 - 12:10:37 6153
George/Umatilla 11:56:05 -16.0 AT Up 13.1 165.7 Really Low 11:41:05 - 12:11:05 6152
Tonasket 11:55:50 -14.8 AT Up 10.4 165.7 Really Low 11:40:50 - 12:10:50 6151
Oroville 11:55:44 -14.7 AT Up 10.1 165.7 Really Low 11:40:44 - 12:10:44 6150
Reno 11:57:01 -19.1 Dark Up 19.2 165.1 Really Low 11:42:01 - 12:12:01 6150
CPSLO 11:57:47 -21.4 Dark Up 23.2 164.0 Low 11:42:47 - 12:12:47 6149
Anarchist Mountain Observatory 11:55:42 -14.7 AT Up 10.1 165.8 Really Low 11:40:42 - 12:10:42 6146
Carson City 11:57:01 -19.2 Dark Up 19.6 165.0 Really Low 11:42:01 - 12:12:01 6145
Kelowna 11:55:41 -14.2 AT Up 9.2 165.8 Really Low 11:40:41 - 12:10:41 6143
Pasco 11:55:58 -15.8 AT Up 12.8 165.9 Really Low 11:40:58 - 12:10:58 6141
Gardnerville 11:57:04 -19.3 Dark Up 19.8 165.1 Really Low 11:42:04 - 12:12:04 6140
PNWRO 11:55:58 -15.7 AT Up 13.1 166.1 Really Low 11:40:58 - 12:10:58 6128
Yerington 11:56:57 -18.9 Dark Up 19.9 165.6 Really Low 11:41:57 - 12:11:57 6106
Lee Vining 11:57:04 -19.2 Dark Up 20.9 165.5 Low 11:42:04 - 12:12:04 6092
Hawthorne 11:56:54 -18.7 Dark Up 20.4 166.0 Low 11:41:54 - 12:11:54 6069
Bishop 11:57:01 -19.0 Dark Up 21.6 166.1 Low 11:42:01 - 12:12:01 6041
Lone Pine 11:57:12 -19.0 Dark Up 22.4 166.4 Low 11:42:12 - 12:12:12 6010
Wildwood 11:57:30 -20.4 Dark Up 24.8 165.7 Low 11:42:30 - 12:12:30 6002
Tonopah 11:56:44 -17.9 AT Up 21.1 167.2 Low 11:41:44 - 12:11:44 5978
Beatty 11:56:51 -18.0 AT Up 22.3 167.6 Low 11:41:51 - 12:11:51 5934
Idyllwild 11:57:22 -19.1 Dark Up 25.5 167.4 Low 11:42:22 - 12:12:22 5875
Indian Springs 11:56:42 -17.3 AT Up 22.8 168.5 Low 11:41:42 - 12:11:42 5861
Henderson 11:56:44 -17.0 AT Up 23.5 169.1 Low 11:41:44 - 12:11:44 5807
Searchlight/Boulder City 11:56:42 -17.2 AT Up 24.0 169.1 Low 11:41:42 - 12:11:42 5793
Calipatria 11:57:09 -18.4 Dark Up 26.3 168.4 Low 11:42:09 - 12:12:09 5785
Laughlin/Bullhead City 11:56:40 -17.0 AT Up 24.4 169.4 Low 11:41:40 - 12:11:40 5765
Mohave Valley 11:56:40 -17.1 AT Up 24.7 169.4 Low 11:41:40 - 12:11:40 5759
Lake Havasu City 11:56:47 -17.1 AT Up 25.1 169.6 Low 11:41:47 - 12:11:47 5734
Blythe 11:56:58 -17.5 AT Up 25.9 169.3 Low 11:41:58 - 12:11:58 5734
Kingman/Dolan Springs 11:56:35 -16.6 AT Up 24.4 169.9 Low 11:41:35 - 12:11:35 5731
Parker 11:56:47 -17.2 AT Up 25.4 169.6 Low 11:41:47 - 12:11:47 5725
Patrick 11:56:40 -16.4 AT Up 24.2 170.1 Low 11:41:40 - 12:11:40 5724
Yuma 11:57:10 -17.9 AT Up 26.8 169.2 Low 11:42:10 - 12:12:10 5716
DCO 11:56:26 -16.0 AT Up 24.6 170.7 Low 11:41:26 - 12:11:26 5670
SwRI 11:54:37 -8.9 NT Down 20.4 177.9 Low 11:39:37 - 12:09:37 5251
Niwot 11:54:36 -8.8 NT Down 20.3 177.9 Low 11:39:36 - 12:09:36 5247

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, (2020/04/05 12:08UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.17  91
34Ups Sco      17:30:45.8 -37:17:46  2.7  9.78 106
Gam1Sgr        18:05:01.2 -29:34:48  4.7  1.13 112
PPM 267678     18:01:12.8 -29:26:40  7.9  0.34 111
PPM 267621     17:59:22.2 -29:29:01  9.2  0.16 111
28978          17:59:49.1 -29:36:22 14.8       111
Positions are for J2000

Event circumstances last updated at 2019/06/07 23:26:00 UT

Marc W. Buie, Southwest Research Institute

RECON