RECON: TNO occultation with 28978

Event between (28978) Ixion and star GA0580:28683105 with event index number of 1108341

Geocentric closest approach at 2021/06/17 07:57:39 UTC

J2000 position of star is 18:01:27.6 -30:17:43
Equinox of date position of star is 18:02:50.0 -30:17:39
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 105 degrees from the moon. Moon is 41% illuminated.
TNO apparent brightness V=19.4

[RECON map]
TNO is 38.7 AU from the Sun and 37.7 AU from the Earth.
The TNO is moving 24.8 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 233 seconds.
The 1-sigma cross-track error in the shadow position is 2523 km.
The sky-plane scale is 27357.4 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 46.3 sec chord
Diameter=468.7 km assuming a 30% albedo -- 18.9 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 28978, (2021/06/17 07:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.6 -26:28:40  0.9 20.58  84
34Ups Sco      17:32:13.5 -37:18:39  2.7  9.46  99
10Gam2Sgr      18:07:11.2 -30:25:18  3.0  0.95 106
PPM 297133     18:02:40.7 -30:09:47  8.5  0.14 105
PPM 297141     18:02:59.0 -30:20:53  9.0  0.06 105
28978          18:02:50.3 -30:17:39 16.1       105
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 3.9 sigma about the mid-time.
The median site spacing is 16.2 km RECON observability=0.4 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)
Clarence Fulton 07:57:34 -16.4 AT Up 9.4 176.1 Really Low 07:42:34 - 08:12:34 10513
Kelowna 07:57:34 -16.8 AT Up 9.7 175.9 Really Low 07:42:34 - 08:12:34 10506
Peachland 07:57:36 -16.9 AT Up 9.8 175.7 Really Low 07:42:36 - 08:12:36 10505
Summerland 07:57:35 -17.0 AT Up 10.0 175.8 Really Low 07:42:35 - 08:12:35 10502
Penticton 07:57:35 -17.1 AT Up 10.1 175.9 Really Low 07:42:35 - 08:12:35 10500
Oliver 07:57:35 -17.4 AT Up 10.4 175.8 Really Low 07:42:35 - 08:12:35 10493
Anarchist Mountain Observatory 07:57:34 -17.6 AT Up 10.6 176.0 Really Low 07:42:34 - 08:12:34 10490
Victoria 07:57:46 -18.0 AT Up 10.8 172.5 Really Low 07:42:46 - 08:12:46 10483
Tonasket 07:57:35 -17.9 AT Up 10.9 176.0 Really Low 07:42:35 - 08:12:35 10483
Okanogan 07:57:35 -18.2 Dark Up 11.2 175.8 Really Low 07:42:35 - 08:12:35 10476
Brewster 07:57:36 -18.5 Dark Up 11.5 175.6 Really Low 07:42:36 - 08:12:36 10471
Manson/Chelan 07:57:37 -18.7 Dark Up 11.7 175.3 Really Low 07:42:37 - 08:12:37 10467
Wenatchee 07:57:37 -19.2 Dark Up 12.1 175.2 Really Low 07:42:37 - 08:12:37 10456
Ellensburg 07:57:38 -19.6 Dark Up 12.5 175.0 Really Low 07:42:38 - 08:12:38 10447
Yakima 07:57:39 -20.0 Dark Up 12.9 174.9 Really Low 07:42:39 - 08:12:39 10437
Toppenish/White Swan 07:57:39 -20.2 Dark Up 13.2 175.1 Really Low 07:42:39 - 08:12:39 10432
Pasco 07:57:35 -20.4 Dark Up 13.4 176.2 Really Low 07:42:35 - 08:12:35 10425
PNWRO 07:57:34 -20.6 Dark Up 13.6 176.4 Really Low 07:42:34 - 08:12:34 10419
Goldendale 07:57:41 -20.8 Dark Up 13.7 174.7 Really Low 07:42:41 - 08:12:41 10418
The Dalles 07:57:41 -21.0 Dark Up 13.9 174.4 Really Low 07:42:41 - 08:12:41 10412
Maupin 07:57:42 -21.4 Dark Up 14.3 174.5 Really Low 07:42:42 - 08:12:42 10401
Sisters 07:57:43 -22.3 Dark Up 15.2 174.0 Really Low 07:42:43 - 08:12:43 10378
Redmond 07:57:42 -22.3 Dark Up 15.2 174.4 Really Low 07:42:42 - 08:12:42 10376
Bend 07:57:42 -22.5 Dark Up 15.4 174.2 Really Low 07:42:42 - 08:12:42 10371
Oregon Observatory 07:57:43 -22.7 Dark Up 15.6 174.1 Really Low 07:42:43 - 08:12:43 10366
La Pine/Gilchrist 07:57:43 -22.9 Dark Up 15.8 174.0 Really Low 07:42:43 - 08:12:43 10360
North Lake 07:57:42 -23.3 Dark Up 16.3 174.6 Really Low 07:42:42 - 08:12:42 10346
Paisley 07:57:41 -23.9 Dark Up 16.8 174.9 Really Low 07:42:41 - 08:12:41 10328
Chiloquin 07:57:45 -24.0 Dark Up 16.9 173.7 Really Low 07:42:45 - 08:12:45 10325
Klamath Falls 07:57:45 -24.3 Dark Up 17.2 173.8 Really Low 07:42:45 - 08:12:45 10314
Lakeview 07:57:40 -24.4 Dark Up 17.3 175.0 Really Low 07:42:40 - 08:12:40 10311
Cedarville 07:57:40 -25.1 Dark Up 18.0 175.2 Really Low 07:42:40 - 08:12:40 10288
Fall River/Burney 07:57:44 -25.5 Dark Up 18.4 174.1 Really Low 07:42:44 - 08:12:44 10273
Susanville 07:57:42 -26.2 Dark Up 19.1 174.7 Really Low 07:42:42 - 08:12:42 10250
Greenville 07:57:43 -26.5 Dark Up 19.3 174.4 Really Low 07:42:43 - 08:12:43 10240
Gimple 07:57:43 -26.5 Dark Up 19.3 174.5 Really Low 07:42:43 - 08:12:43 10240
Quincy 07:57:43 -26.7 Dark Up 19.5 174.4 Really Low 07:42:43 - 08:12:43 10233
Portola 07:57:41 -26.8 Dark Up 19.7 174.9 Really Low 07:42:41 - 08:12:41 10228
Reno 07:57:40 -27.1 Dark Up 20.0 175.4 Low 07:42:40 - 08:12:40 10216
Carson City 07:57:40 -27.4 Dark Up 20.4 175.4 Low 07:42:40 - 08:12:40 10202
Yerington 07:57:38 -27.6 Dark Up 20.6 176.0 Low 07:42:38 - 08:12:38 10193
Gardnerville 07:57:39 -27.7 Dark Up 20.6 175.5 Low 07:42:39 - 08:12:39 10193
Hawthorne 07:57:35 -28.1 Dark Up 21.1 176.5 Low 07:42:35 - 08:12:35 10173
Lee Vining 07:57:37 -28.7 Dark Up 21.6 176.0 Low 07:42:37 - 08:12:37 10153
Tonopah 07:57:31 -28.5 Dark Down 21.6 177.8 Low 07:42:31 - 08:12:31 10149
Dunrhomin 07:56:51 -25.1 Dark Down 18.9 188.6 Really Low 07:41:51 - 08:11:51 10129
Bishop 07:57:35 -29.2 Dark Up 22.3 176.7 Low 07:42:35 - 08:12:35 10125
Beatty 07:57:30 -29.7 Dark Down 22.8 178.2 Low 07:42:30 - 08:12:30 10098
Indian Springs 07:57:26 -30.0 Dark Down 23.1 179.2 Low 07:42:26 - 08:12:26 10078
Henderson 07:57:23 -30.4 Dark Down 23.7 179.8 Low 07:42:23 - 08:12:23 10050
CPSLO 07:57:44 -31.3 Dark Up 24.2 174.5 Low 07:42:44 - 08:12:44 10040
Patrick 07:57:20 -31.0 Dark Down 24.3 180.9 Low 07:42:20 - 08:12:20 10015
Laughlin/Bullhead City 07:57:22 -31.3 Dark Down 24.5 180.2 Low 07:42:22 - 08:12:22 10008
Kingman/Dolan Springs 07:57:21 -31.2 Dark Down 24.5 180.7 Low 07:42:21 - 08:12:21 10006
Mohave Valley 07:57:22 -31.6 Dark Down 24.8 180.2 Low 07:42:22 - 08:12:22 9995
Wildwood 07:57:37 -32.5 Dark Down 25.5 176.4 Low 07:42:37 - 08:12:37 9979
Lake Havasu City 07:57:22 -31.9 Dark Down 25.2 180.4 Low 07:42:22 - 08:12:22 9975
Parker 07:57:22 -32.3 Dark Down 25.6 180.5 Low 07:42:22 - 08:12:22 9958
Idyllwild 07:57:30 -32.8 Dark Down 25.9 178.2 Low 07:42:30 - 08:12:30 9954
Blythe 07:57:22 -32.8 Dark Down 26.1 180.2 Low 07:42:22 - 08:12:22 9934
George/Scottsdale 07:57:13 -32.5 Dark Down 25.9 182.8 Low 07:42:13 - 08:12:13 9918
Calipatria 07:57:26 -33.4 Dark Down 26.6 179.3 Low 07:42:26 - 08:12:26 9916
Yuma 07:57:22 -33.8 Dark Down 27.0 180.1 Low 07:42:22 - 08:12:22 9889

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, (2021/06/17 07:58UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.58  84
34Ups Sco      17:30:45.8 -37:17:46  2.7  9.46  99
10Gam2Sgr      18:05:48.4 -30:25:31  3.0  0.95 106
PPM 297133     18:01:18.1 -30:09:50  8.5  0.14 105
PPM 297141     18:01:36.2 -30:20:58  9.0  0.06 105
28978          18:01:27.6 -30:17:43 16.1       105
Positions are for J2000

Event circumstances last updated at 2021/05/20 01:10:13 UT

Marc W. Buie, Southwest Research Institute

RECON