RECON: TNO occultation with 28978

Event between (28978) Ixion and star GA0580:29251191 with event index number of 1213116

Geocentric closest approach at 2022/08/15 05:36:15 UTC

J2000 position of star is 18:03:01.1 -30:46:41
Equinox of date position of star is 18:04:27.1 -30:46:34
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 94 degrees from the moon. Moon is 87% illuminated.
TNO apparent brightness V=19.5

[RECON map]
TNO is 38.4 AU from the Sun and 37.8 AU from the Earth.
The TNO is moving 13.7 km/sec on the sky relative to the star, or, 1.8 arcsec/hr.
The 1-sigma error in the time of the event is 434 seconds.
The 1-sigma cross-track error in the shadow position is 2866 km.
The sky-plane scale is 27415.2 km/arcsec.

The TNO has an absolute magnitude Hv=3.6
Diameter=1148.2 km assuming a 5% albedo -- 83.8 sec chord
Diameter=468.7 km assuming a 30% albedo -- 34.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 28978, (2022/08/15 05:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:47.9 -26:28:49  0.9 20.96 115
Kap Sco        17:44:03.3 -39:02:22  2.4  9.26  97
10Gam2Sgr      18:07:15.7 -30:25:18  3.0  0.70  93
PPM 297208     18:06:16.9 -30:33:33  8.1  0.44  94
PPM 297166     18:04:07.6 -30:49:54  8.9  0.09  94
28978          18:04:28.7 -30:46:34 16.6        94
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 2.1 sigma about the mid-time.
The median site spacing is 9.6 km RECON observability=0.2 and success probability=1.5%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:35:39 -17.4 AT Up 7.3 194.2 Really Low 05:20:39 - 05:50:39 2070
Kelowna 05:35:33 -18.4 Dark Up 7.9 194.9 Really Low 05:20:33 - 05:50:33 2053
Peachland 05:35:34 -18.4 Dark Up 8.1 194.7 Really Low 05:20:34 - 05:50:34 2052
Summerland 05:35:33 -18.5 Dark Up 8.2 194.8 Really Low 05:20:33 - 05:50:33 2049
Penticton 05:35:33 -18.6 Dark Up 8.2 194.9 Really Low 05:20:33 - 05:50:33 2047
Oliver 05:35:32 -18.9 Dark Up 8.6 194.9 Really Low 05:20:32 - 05:50:32 2041
Victoria 05:35:50 -17.8 AT Up 9.8 191.7 Really Low 05:20:50 - 05:50:50 2038
Anarchist Mountain Observatory 05:35:31 -19.1 Dark Up 8.7 195.0 Really Low 05:20:31 - 05:50:31 2038
Tonasket 05:35:30 -19.3 Dark Up 9.0 195.0 Really Low 05:20:30 - 05:50:30 2031
Okanogan 05:35:30 -19.5 Dark Up 9.4 194.9 Really Low 05:20:30 - 05:50:30 2025
Brewster 05:35:31 -19.7 Dark Up 9.7 194.7 Really Low 05:20:31 - 05:50:31 2020
Manson/Chelan 05:35:33 -19.7 Dark Up 9.9 194.4 Really Low 05:20:33 - 05:50:33 2017
Wenatchee 05:35:33 -20.0 Dark Up 10.4 194.3 Really Low 05:20:33 - 05:50:33 2008
Ellensburg 05:35:32 -20.2 Dark Up 10.9 194.1 Really Low 05:20:32 - 05:50:32 1999
Yakima 05:35:32 -20.5 Dark Up 11.3 194.1 Really Low 05:20:32 - 05:50:32 1990
Sleaford 05:34:35 -20.8 Dark Up 2.9 206.0 Really Low 05:19:35 - 05:49:35 1984
Toppenish/White Swan 05:35:31 -20.7 Dark Up 11.4 194.3 Really Low 05:20:31 - 05:50:31 1984
Goldendale 05:35:32 -21.0 Dark Up 12.1 193.9 Really Low 05:20:32 - 05:50:32 1972
PNWRO 05:35:22 -21.7 Dark Up 11.5 195.6 Really Low 05:20:22 - 05:50:22 1969
The Dalles 05:35:33 -21.0 Dark Up 12.3 193.6 Really Low 05:20:33 - 05:50:33 1967
Maupin 05:35:33 -21.4 Dark Up 12.7 193.8 Really Low 05:20:33 - 05:50:33 1956
Sisters 05:35:34 -21.8 Dark Up 13.7 193.4 Really Low 05:20:34 - 05:50:34 1934
Bend 05:35:32 -22.1 Dark Up 13.8 193.6 Really Low 05:20:32 - 05:50:32 1927
Oregon Observatory 05:35:33 -22.2 Dark Up 14.0 193.5 Really Low 05:20:33 - 05:50:33 1923
North Lake 05:35:28 -22.9 Dark Up 14.6 194.0 Really Low 05:20:28 - 05:50:28 1903
Chiloquin 05:35:33 -23.0 Dark Up 15.4 193.2 Really Low 05:20:33 - 05:50:33 1885
Klamath Falls 05:35:32 -23.3 Dark Up 15.7 193.3 Really Low 05:20:32 - 05:50:32 1874
Lakeview 05:35:23 -24.0 Dark Up 15.5 194.5 Really Low 05:20:23 - 05:50:23 1868
Cedarville 05:35:21 -24.5 Dark Up 16.1 194.7 Really Low 05:20:21 - 05:50:21 1846
Fall River/Burney 05:35:28 -24.3 Dark Up 16.8 193.7 Really Low 05:20:28 - 05:50:28 1834
Susanville 05:35:22 -25.2 Dark Up 17.3 194.4 Really Low 05:20:22 - 05:50:22 1810
Greenville 05:35:23 -25.2 Dark Up 17.6 194.2 Really Low 05:20:23 - 05:50:23 1801
Gimple 05:35:23 -25.3 Dark Up 17.6 194.2 Really Low 05:20:23 - 05:50:23 1801
Quincy 05:35:23 -25.4 Dark Up 17.8 194.2 Really Low 05:20:23 - 05:50:23 1794
Portola 05:35:21 -25.7 Dark Up 17.8 194.6 Really Low 05:20:21 - 05:50:21 1788
Reno 05:35:16 -26.2 Dark Up 18.0 195.2 Really Low 05:20:16 - 05:50:16 1776
Carson City 05:35:15 -26.5 Dark Up 18.3 195.2 Really Low 05:20:15 - 05:50:15 1762
Gardnerville 05:35:15 -26.7 Dark Up 18.5 195.3 Really Low 05:20:15 - 05:50:15 1753
Yerington 05:35:11 -27.0 Dark Up 18.4 195.8 Really Low 05:20:11 - 05:50:11 1752
Hawthorne 05:35:08 -27.6 Dark Up 18.7 196.3 Really Low 05:20:08 - 05:50:08 1732
Lee Vining 05:35:09 -27.8 Dark Up 19.3 195.9 Really Low 05:20:09 - 05:50:09 1713
Tonopah 05:34:58 -28.6 Dark Up 18.8 197.5 Really Low 05:19:58 - 05:49:58 1706
Bishop 05:35:04 -28.6 Dark Up 19.8 196.6 Really Low 05:20:04 - 05:50:04 1684
Dunrhomin 05:33:55 -31.7 Dark Up 13.3 207.2 Really Low 05:18:55 - 05:48:55 1663
CU-SBO 05:33:55 -31.9 Dark Up 13.6 207.1 Really Low 05:18:55 - 05:48:55 1655
Beatty 05:34:53 -29.7 Dark Up 19.8 198.0 Really Low 05:19:53 - 05:49:53 1655
Indian Springs 05:34:45 -30.5 Dark Up 19.9 199.0 Really Low 05:19:45 - 05:49:45 1634
Henderson 05:34:41 -31.3 Dark Up 20.2 199.6 Low 05:19:41 - 05:49:41 1605
Patrick 05:34:32 -32.3 Dark Up 20.5 200.7 Low 05:19:32 - 05:49:32 1568
Laughlin/Bullhead City 05:34:36 -32.2 Dark Up 20.9 200.1 Low 05:19:36 - 05:49:36 1563
Kingman/Dolan Springs 05:34:33 -32.4 Dark Up 20.7 200.5 Low 05:19:33 - 05:49:33 1560
Mohave Valley 05:34:35 -32.4 Dark Up 21.2 200.1 Low 05:19:35 - 05:49:35 1551
Wildwood 05:34:59 -30.9 Dark Up 22.9 196.8 Low 05:19:59 - 05:49:59 1542
Lake Havasu City 05:34:34 -32.8 Dark Up 21.5 200.4 Low 05:19:34 - 05:49:34 1530
Idyllwild 05:34:46 -32.2 Dark Up 22.8 198.4 Low 05:19:46 - 05:49:46 1515
Parker 05:34:33 -33.1 Dark Up 21.8 200.5 Low 05:19:33 - 05:49:33 1514
Calipatria 05:34:38 -33.3 Dark Up 23.1 199.6 Low 05:19:38 - 05:49:38 1475
George/Scottsdale 05:34:17 -34.6 Dark Up 21.5 202.6 Low 05:19:17 - 05:49:17 1470
Yuma 05:34:32 -34.1 Dark Up 23.2 200.4 Low 05:19:32 - 05:49:32 1447

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, (2022/08/15 05:36UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 20.96 115
Kap Sco        17:42:29.3 -39:01:49  2.4  9.26  97
10Gam2Sgr      18:05:48.4 -30:25:31  3.0  0.70  93
PPM 297208     18:04:49.5 -30:33:44  8.1  0.44  94
PPM 297166     18:02:40.0 -30:50:01  8.9  0.09  94
28978          18:03:01.1 -30:46:41 16.6        94
Positions are for J2000

Event circumstances last updated at 2022/03/16 00:56:41 UT

Marc W. Buie, Southwest Research Institute

RECON