RECON: TNO occultation with 28978

Event between (28978) Ixion and star GA0580:29717338 with event index number of 1108151

Geocentric closest approach at 2021/05/17 09:19:17 UTC

J2000 position of star is 18:04:19.3 -30:13:12
Equinox of date position of star is 18:05:41.4 -30:13:03
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 153 degrees from the moon. Moon is 26% illuminated.
TNO apparent brightness V=19.5

[RECON map]
TNO is 38.7 AU from the Sun and 37.9 AU from the Earth.
The TNO is moving 19.9 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 291 seconds.
The 1-sigma cross-track error in the shadow position is 3140 km.
The sky-plane scale is 27499.3 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 57.7 sec chord
Diameter=468.7 km assuming a 30% albedo -- 23.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 28978, (2021/05/17 09:19UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:43.3 -26:28:39  0.9 21.19 132
Kap Sco        17:43:58.1 -39:02:20  2.4  9.88 147
10Gam2Sgr      18:07:10.9 -30:25:18  3.0  0.38 153
PPM 297208     18:06:12.0 -30:33:33  8.1  0.36 153
PPM 297210     18:06:23.1 -30:13:28  8.8  0.15 153
28978          18:05:41.6 -30:13:03 16.8       153
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 3.1 sigma about the mid-time.
The median site spacing is 16.0 km RECON observability=0.3 and success probability=0.0%
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 09:19:14 -17.8 AT Down 8.4 166.7 Really Low 09:04:14 - 09:34:14 12916
Kelowna 09:19:15 -18.2 Dark Down 8.8 166.5 Really Low 09:04:15 - 09:34:15 12910
Peachland 09:19:16 -18.4 Dark Down 8.8 166.3 Really Low 09:04:16 - 09:34:16 12909
Summerland 09:19:17 -18.5 Dark Down 9.0 166.4 Really Low 09:04:17 - 09:34:17 12907
Penticton 09:19:15 -18.5 Dark Down 9.1 166.5 Really Low 09:04:15 - 09:34:15 12905
Oliver 09:19:17 -18.9 Dark Down 9.4 166.4 Really Low 09:04:17 - 09:34:17 12899
Anarchist Mountain Observatory 09:19:15 -19.0 Dark Down 9.6 166.6 Really Low 09:04:15 - 09:34:15 12896
Victoria 09:19:30 -20.3 Dark Down 9.4 163.2 Really Low 09:04:30 - 09:34:30 12894
Tonasket 09:19:16 -19.3 Dark Down 9.9 166.5 Really Low 09:04:16 - 09:34:16 12890
Okanogan 09:19:17 -19.6 Dark Down 10.2 166.4 Really Low 09:04:17 - 09:34:17 12884
Brewster 09:19:19 -19.9 Dark Down 10.4 166.2 Really Low 09:04:19 - 09:34:19 12879
Manson/Chelan 09:19:19 -20.2 Dark Down 10.6 165.9 Really Low 09:04:19 - 09:34:19 12876
Wenatchee 09:19:22 -20.7 Dark Down 11.0 165.7 Really Low 09:04:22 - 09:34:22 12867
Ellensburg 09:19:21 -21.1 Dark Down 11.4 165.5 Really Low 09:04:21 - 09:34:21 12859
Yakima 09:19:23 -21.5 Dark Down 11.8 165.5 Really Low 09:04:23 - 09:34:23 12850
Toppenish/White Swan 09:19:23 -21.7 Dark Down 12.0 165.6 Really Low 09:04:23 - 09:34:23 12845
Pasco 09:19:18 -21.5 Dark Down 12.3 166.7 Really Low 09:04:18 - 09:34:18 12838
Goldendale 09:19:26 -22.3 Dark Down 12.5 165.2 Really Low 09:04:26 - 09:34:26 12833
PNWRO 09:19:18 -21.7 Dark Down 12.6 166.9 Really Low 09:04:18 - 09:34:18 12832
The Dalles 09:19:28 -22.6 Dark Down 12.6 164.9 Really Low 09:04:28 - 09:34:28 12828
Maupin 09:19:28 -23.0 Dark Down 13.0 165.0 Really Low 09:04:28 - 09:34:28 12818
Sisters 09:19:30 -23.9 Dark Down 13.8 164.5 Really Low 09:04:30 - 09:34:30 12797
Redmond 09:19:28 -23.8 Dark Down 13.9 164.8 Really Low 09:04:28 - 09:34:28 12796
Bend 09:19:30 -24.1 Dark Down 14.1 164.7 Really Low 09:04:30 - 09:34:30 12790
Oregon Observatory 09:19:30 -24.3 Dark Down 14.2 164.6 Really Low 09:04:30 - 09:34:30 12786
La Pine/Gilchrist 09:19:30 -24.5 Dark Down 14.4 164.5 Really Low 09:04:30 - 09:34:30 12780
North Lake 09:19:30 -24.7 Dark Down 14.9 165.0 Really Low 09:04:30 - 09:34:30 12767
Paisley 09:19:28 -25.2 Dark Down 15.5 165.3 Really Low 09:04:28 - 09:34:28 12750
Chiloquin 09:19:33 -25.6 Dark Down 15.4 164.1 Really Low 09:04:33 - 09:34:33 12749
Klamath Falls 09:19:34 -25.9 Dark Down 15.7 164.2 Really Low 09:04:34 - 09:34:34 12739
Lakeview 09:19:29 -25.6 Dark Down 16.1 165.4 Really Low 09:04:29 - 09:34:29 12734
Cedarville 09:19:30 -26.1 Dark Down 16.7 165.5 Really Low 09:04:30 - 09:34:30 12713
Fall River/Burney 09:19:34 -26.9 Dark Down 17.0 164.4 Really Low 09:04:34 - 09:34:34 12700
Susanville 09:19:33 -27.3 Dark Down 17.7 165.0 Really Low 09:04:33 - 09:34:33 12678
Greenville 09:19:34 -27.6 Dark Down 17.9 164.7 Really Low 09:04:34 - 09:34:34 12669
Gimple 09:19:33 -27.6 Dark Down 17.9 164.8 Really Low 09:04:33 - 09:34:33 12669
Quincy 09:19:33 -27.8 Dark Down 18.1 164.7 Really Low 09:04:33 - 09:34:33 12662
Portola 09:19:33 -27.8 Dark Down 18.3 165.1 Really Low 09:04:33 - 09:34:33 12657
Reno 09:19:30 -27.9 Dark Down 18.7 165.7 Really Low 09:04:30 - 09:34:30 12645
Carson City 09:19:30 -28.2 Dark Down 19.1 165.7 Really Low 09:04:30 - 09:34:30 12632
Gardnerville 09:19:31 -28.4 Dark Down 19.3 165.7 Really Low 09:04:31 - 09:34:31 12623
Yerington 09:19:28 -28.2 Dark Down 19.4 166.2 Really Low 09:04:28 - 09:34:28 12623
Hawthorne 09:19:28 -28.4 Dark Down 19.9 166.7 Really Low 09:04:28 - 09:34:28 12603
Lee Vining 09:19:28 -29.1 Dark Down 20.4 166.2 Low 09:04:28 - 09:34:28 12584
Tonopah 09:19:21 -28.4 Dark Down 20.6 167.9 Low 09:04:21 - 09:34:21 12579
Bishop 09:19:28 -29.4 Dark Down 21.1 166.8 Low 09:04:28 - 09:34:28 12557
Dunrhomin 09:18:29 -21.9 Dark Down 19.5 178.8 Really Low 09:03:29 - 09:33:29 12539
Beatty 09:19:20 -29.3 Dark Down 21.8 168.2 Low 09:04:20 - 09:34:20 12530
Indian Springs 09:19:16 -29.2 Dark Down 22.3 169.1 Low 09:04:16 - 09:34:16 12509
Henderson 09:19:14 -29.4 Dark Down 22.9 169.7 Low 09:04:14 - 09:34:14 12482
CPSLO 09:19:39 -32.0 Dark Down 22.7 164.6 Low 09:04:39 - 09:34:39 12480
Patrick 09:19:10 -29.6 Dark Down 23.7 170.7 Low 09:04:10 - 09:34:10 12446
Laughlin/Bullhead City 09:19:14 -30.0 Dark Down 23.9 170.0 Low 09:04:14 - 09:34:14 12441
Kingman/Dolan Springs 09:19:11 -29.8 Dark Down 23.9 170.5 Low 09:04:11 - 09:34:11 12438
Mohave Valley 09:19:14 -30.3 Dark Down 24.1 170.0 Low 09:04:14 - 09:34:14 12429
Wildwood 09:19:31 -32.5 Dark Down 24.2 166.3 Low 09:04:31 - 09:34:31 12419
Lake Havasu City 09:19:13 -30.5 Dark Down 24.6 170.2 Low 09:04:13 - 09:34:13 12409
Idyllwild 09:19:23 -32.1 Dark Down 24.9 168.0 Low 09:04:23 - 09:34:23 12393
Parker 09:19:14 -30.8 Dark Down 24.9 170.2 Low 09:04:14 - 09:34:14 12393
Blythe 09:19:14 -31.4 Dark Down 25.4 169.9 Low 09:04:14 - 09:34:14 12371
Calipatria 09:19:20 -32.2 Dark Down 25.7 169.0 Low 09:04:20 - 09:34:20 12355
George/Scottsdale 09:19:03 -30.2 Dark Down 25.6 172.5 Low 09:04:03 - 09:34:03 12351
Yuma 09:19:17 -32.2 Dark Down 26.3 169.8 Low 09:04:17 - 09:34:17 12327

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, (2021/05/17 09:19UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.19 132
Kap Sco        17:42:29.3 -39:01:49  2.4  9.88 147
10Gam2Sgr      18:05:48.4 -30:25:31  3.0  0.38 153
PPM 297208     18:04:49.5 -30:33:44  8.1  0.36 153
PPM 297210     18:05:00.7 -30:13:38  8.8  0.15 153
28978          18:04:19.3 -30:13:12 16.8       153
Positions are for J2000

Event circumstances last updated at 2021/04/25 22:58:36 UT

Marc W. Buie, Southwest Research Institute

RECON