RECON: TNO occultation with 28978

Event between (28978) Ixion and star GA0580:28210842 with event index number of 1108429

Geocentric closest approach at 2021/06/30 05:40:02 UTC

J2000 position of star is 18:00:09.6 -30:18:41
Equinox of date position of star is 18:01:32.1 -30:18:40
Stellar brightness G=14.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 79 degrees from the moon. Moon is 66% illuminated.
TNO apparent brightness V=19.5

[RECON map]
TNO is 38.7 AU from the Sun and 37.7 AU from the Earth.
The TNO is moving 24.6 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 232 seconds.
The 1-sigma cross-track error in the shadow position is 2406 km.
The sky-plane scale is 27356.1 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 46.8 sec chord
Diameter=468.7 km assuming a 30% albedo -- 19.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 28978, (2021/06/30 05:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.7 -26:28:40  0.9 20.30  99
34Ups Sco      17:32:13.6 -37:18:39  2.7  9.27  84
10Gam2Sgr      18:07:11.4 -30:25:18  3.0  1.22  78
PPM 297099     18:01:12.8 -30:19:22  8.3  0.07  79
28978          18:01:32.5 -30:18:40 14.7        79
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 12.7 km RECON observability=0.2 and success probability=2.0%
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 05:41:04 -10.3 NT Down 6.3 158.0 Really Low 05:26:04 - 05:56:04 -324
Kelowna 05:41:05 -10.6 NT Down 6.6 157.8 Really Low 05:26:05 - 05:56:05 -334
Peachland 05:41:05 -10.6 NT Down 6.7 157.6 Really Low 05:26:05 - 05:56:05 -340
Summerland 05:41:05 -10.8 NT Down 6.8 157.7 Really Low 05:26:05 - 05:56:05 -342
Penticton 05:41:05 -10.9 NT Down 6.9 157.8 Really Low 05:26:05 - 05:56:05 -343
Oliver 05:41:06 -11.2 NT Down 7.2 157.7 Really Low 05:26:06 - 05:56:06 -351
Anarchist Mountain Observatory 05:41:06 -11.4 NT Down 7.5 157.9 Really Low 05:26:06 - 05:56:06 -351
Tonasket 05:41:06 -11.6 NT Down 7.7 157.8 Really Low 05:26:06 - 05:56:06 -360
Okanogan 05:41:07 -11.8 NT Down 8.0 157.7 Really Low 05:26:07 - 05:56:07 -370
Brewster 05:41:08 -12.0 NT Down 8.2 157.5 Really Low 05:26:08 - 05:56:08 -380
Manson/Chelan 05:41:09 -12.0 AT Down 8.3 157.2 Really Low 05:26:09 - 05:56:09 -390
Wenatchee 05:41:11 -12.4 AT Down 8.7 157.0 Really Low 05:26:11 - 05:56:11 -405
Ellensburg 05:41:12 -12.6 AT Down 9.0 156.8 Really Low 05:26:12 - 05:56:12 -419
Pasco 05:41:09 -13.8 AT Down 10.1 157.9 Really Low 05:26:09 - 05:56:09 -420
Victoria 05:41:17 -10.3 NT Down 6.8 154.6 Really Low 05:26:17 - 05:56:17 -422
PNWRO 05:41:09 -14.1 AT Down 10.4 158.1 Really Low 05:26:09 - 05:56:09 -423
Yakima 05:41:13 -13.0 AT Down 9.4 156.8 Really Low 05:26:13 - 05:56:13 -430
Toppenish/White Swan 05:41:12 -13.2 AT Down 9.6 156.9 Really Low 05:26:12 - 05:56:12 -434
Goldendale 05:41:14 -13.5 AT Down 10.0 156.5 Really Low 05:26:14 - 05:56:14 -456
The Dalles 05:41:16 -13.6 AT Down 10.1 156.2 Really Low 05:26:16 - 05:56:16 -469
Dunrhomin 05:40:32 -23.7 Dark Down 18.6 169.5 Really Low 05:25:32 - 05:55:32 -478
Maupin 05:41:16 -13.9 AT Down 10.5 156.3 Really Low 05:26:16 - 05:56:16 -480
Redmond 05:41:18 -14.7 AT Down 11.3 156.1 Really Low 05:26:18 - 05:56:18 -509
Sisters 05:41:19 -14.5 AT Down 11.2 155.8 Really Low 05:26:19 - 05:56:19 -514
Bend 05:41:19 -14.8 AT Down 11.5 156.0 Really Low 05:26:19 - 05:56:19 -518
Oregon Observatory 05:41:19 -14.9 AT Down 11.6 155.9 Really Low 05:26:19 - 05:56:19 -526
La Pine/Gilchrist 05:41:20 -15.0 AT Down 11.8 155.8 Really Low 05:26:20 - 05:56:20 -533
North Lake 05:41:19 -15.6 AT Down 12.4 156.3 Really Low 05:26:19 - 05:56:19 -538
Paisley 05:41:18 -16.2 AT Down 13.0 156.5 Really Low 05:26:18 - 05:56:18 -552
Lakeview 05:41:19 -16.7 AT Down 13.5 156.6 Really Low 05:26:19 - 05:56:19 -567
Chiloquin 05:41:22 -15.8 AT Down 12.7 155.4 Really Low 05:26:22 - 05:56:22 -578
Cedarville 05:41:19 -17.3 AT Down 14.1 156.7 Really Low 05:26:19 - 05:56:19 -588
Klamath Falls 05:41:23 -16.1 AT Down 13.0 155.5 Really Low 05:26:23 - 05:56:23 -588
Fall River/Burney 05:41:23 -17.2 AT Down 14.2 155.7 Really Low 05:26:23 - 05:56:23 -626
Susanville 05:41:22 -18.0 Dark Down 15.0 156.2 Really Low 05:26:22 - 05:56:22 -638
Gimple 05:41:23 -18.2 Dark Down 15.2 156.0 Really Low 05:26:23 - 05:56:23 -653
Greenville 05:41:23 -18.1 Dark Down 15.2 155.9 Really Low 05:26:23 - 05:56:23 -654
Portola 05:41:22 -18.6 Dark Down 15.6 156.3 Really Low 05:26:22 - 05:56:22 -659
Reno 05:41:21 -19.1 Dark Down 16.1 156.8 Really Low 05:26:21 - 05:56:21 -659
Quincy 05:41:23 -18.3 Dark Down 15.4 155.9 Really Low 05:26:23 - 05:56:23 -662
Yerington 05:41:19 -19.9 Dark Down 16.8 157.3 Really Low 05:26:19 - 05:56:19 -672
Carson City 05:41:21 -19.4 Dark Down 16.4 156.8 Really Low 05:26:21 - 05:56:21 -674
Tonopah 05:41:14 -21.5 Dark Down 18.2 158.8 Really Low 05:26:14 - 05:56:14 -682
Gardnerville 05:41:21 -19.7 Dark Down 16.7 156.8 Really Low 05:26:21 - 05:56:21 -683
Hawthorne 05:41:18 -20.5 Dark Down 17.4 157.7 Really Low 05:26:18 - 05:56:18 -683
Lee Vining 05:41:20 -20.7 Dark Down 17.8 157.2 Really Low 05:26:20 - 05:56:20 -714
Indian Springs 05:41:11 -23.4 Dark Down 20.0 160.0 Low 05:26:11 - 05:56:11 -726
Beatty 05:41:14 -22.6 Dark Down 19.4 159.1 Really Low 05:26:14 - 05:56:14 -726
Bishop 05:41:19 -21.6 Dark Down 18.5 157.7 Really Low 05:26:19 - 05:56:19 -730
Henderson 05:41:09 -24.1 Dark Down 20.7 160.5 Low 05:26:09 - 05:56:09 -742
Patrick 05:41:06 -25.1 Dark Down 21.6 161.4 Low 05:26:06 - 05:56:06 -756
Kingman/Dolan Springs 05:41:06 -25.2 Dark Down 21.8 161.2 Low 05:26:06 - 05:56:06 -769
Laughlin/Bullhead City 05:41:09 -25.0 Dark Down 21.7 160.7 Low 05:26:09 - 05:56:09 -777
Mohave Valley 05:41:09 -25.3 Dark Down 21.9 160.7 Low 05:26:09 - 05:56:09 -790
Lake Havasu City 05:41:08 -25.7 Dark Down 22.4 160.9 Low 05:26:08 - 05:56:08 -806
George/Scottsdale 05:41:00 -27.4 Dark Down 23.7 162.9 Low 05:26:00 - 05:56:00 -815
Parker 05:41:08 -26.0 Dark Down 22.7 160.8 Low 05:26:08 - 05:56:08 -823
Blythe 05:41:10 -26.4 Dark Down 23.1 160.5 Low 05:26:10 - 05:56:10 -853
CPSLO 05:41:29 -22.2 Dark Down 19.7 155.6 Really Low 05:26:29 - 05:56:29 -862
Idyllwild 05:41:17 -25.3 Dark Down 22.4 158.7 Low 05:26:17 - 05:56:17 -875
Wildwood 05:41:23 -24.2 Dark Down 21.5 157.1 Low 05:26:23 - 05:56:23 -887
Calipatria 05:41:14 -26.4 Dark Down 23.3 159.6 Low 05:26:14 - 05:56:14 -890
Yuma 05:41:11 -27.1 Dark Down 24.0 160.3 Low 05:26:11 - 05:56:11 -900

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, (2021/06/30 05:40UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.30  99
34Ups Sco      17:30:45.8 -37:17:46  2.7  9.27  84
10Gam2Sgr      18:05:48.4 -30:25:31  3.0  1.22  78
PPM 297099     17:59:50.0 -30:19:23  8.3  0.07  79
28978          18:00:09.6 -30:18:41 14.7        79
Positions are for J2000

Event circumstances last updated at 2021/05/20 01:10:43 UT

Marc W. Buie, Southwest Research Institute

RECON