RECON: TNO occultation with 578992

Event between (578992) 14JL80 and star GA0700:11480781 with event index number of 2555301

Geocentric closest approach at 2027/05/04 09:26:30 UTC

J2000 position of star is 17:30:21.8 -18:32:25
Equinox of date position of star is 17:31:47.9 -18:33:26
Stellar brightness G=16.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 114 degrees from the moon. Moon is 5% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 28.6 AU from the Sun and 27.8 AU from the Earth.
Apparent velocity is 16.3 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 125 seconds.
The 1-sigma cross-track error in the shadow position is 1115 km.
The sky-plane scale is 20149.7 km/arcsec.

The object has an absolute magnitude Hv=7.4
Diameter=199.5 km assuming a 5% albedo -- 12.4 sec chord
Diameter=81.5 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 578992, (2027/05/04 09:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.3 -26:29:25  0.9 16.12 128
35Eta Oph      17:11:56.9 -15:45:24  2.6  5.54 118
PPM 233026     17:26:13.2 -18:28:07  6.4  1.37 115
PPM 233265     17:36:09.4 -18:14:14  7.4  1.04 113
PPM 233164     17:32:06.0 -18:48:20  9.4  0.25 114
578992         17:31:58.0 -18:33:33 16.0       113
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 5.0 sigma about the mid-time.
The median site spacing is 15.0 km RECON observability=0.9 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)
Sleaford 09:27:33 -14.9 AT Down 19.3 175.4 Really Low 09:16:40 - 09:38:26 2564
Kamloops 09:28:32 -20.5 Dark Down 18.8 161.2 Really Low 09:17:39 - 09:39:25 2328
Kelowna 09:28:30 -21.0 Dark Down 19.8 162.0 Really Low 09:17:37 - 09:39:23 2305
Peachland 09:28:31 -21.2 Dark Down 19.8 161.7 Really Low 09:17:38 - 09:39:24 2296
Summerland 09:28:31 -21.3 Dark Down 20.0 161.7 Really Low 09:17:38 - 09:39:24 2291
Penticton 09:28:30 -21.3 Dark Down 20.1 161.8 Low 09:17:37 - 09:39:23 2289
Oliver 09:28:31 -21.7 Dark Down 20.4 161.8 Low 09:17:38 - 09:39:24 2273
Anarchist Mountain Observatory 09:28:30 -21.8 Dark Down 20.6 162.0 Low 09:17:37 - 09:39:23 2269
Okanogan 09:28:32 -22.4 Dark Down 21.2 161.7 Low 09:17:39 - 09:39:25 2234
Brewster 09:28:33 -22.7 Dark Down 21.4 161.5 Low 09:17:40 - 09:39:26 2218
Manson/Chelan 09:28:35 -23.0 Dark Down 21.5 161.1 Low 09:17:42 - 09:39:28 2202
Victoria 09:28:47 -23.2 Dark Down 20.2 158.0 Low 09:17:54 - 09:39:40 2181
Wenatchee 09:28:36 -23.5 Dark Down 21.9 160.9 Low 09:17:43 - 09:39:29 2176
Ellensburg 09:28:38 -23.9 Dark Down 22.3 160.6 Low 09:17:45 - 09:39:31 2153
Yakima 09:28:38 -24.3 Dark Down 22.7 160.5 Low 09:17:45 - 09:39:31 2132
PNWRO 09:28:32 -24.3 Dark Down 23.6 162.1 Low 09:17:39 - 09:39:25 2128
Toppenish/White Swan 09:28:38 -24.4 Dark Down 22.9 160.6 Low 09:17:45 - 09:39:31 2123
The Dalles 09:28:42 -25.4 Dark Down 23.5 159.8 Low 09:17:49 - 09:39:35 2070
Maupin 09:28:42 -25.7 Dark Down 23.9 159.8 Low 09:17:49 - 09:39:35 2049
Dunrhomin 09:27:30 -23.9 Dark Down 31.1 175.8 Up 09:16:37 - 09:38:23 2006
Nikitin 09:27:30 -24.0 Dark Down 31.3 175.7 Up 09:16:37 - 09:38:23 1995
Sisters 09:28:46 -26.7 Dark Down 24.6 159.2 Low 09:17:53 - 09:39:39 1994
CU-SBO 09:27:30 -24.1 Dark Down 31.3 175.6 Up 09:16:37 - 09:38:23 1991
Bend 09:28:45 -26.8 Dark Down 24.9 159.4 Low 09:17:52 - 09:39:38 1985
Oregon Observatory 09:28:45 -27.0 Dark Down 25.0 159.2 Low 09:17:52 - 09:39:38 1974
Chiloquin 09:28:49 -28.3 Dark Down 26.1 158.6 Low 09:17:56 - 09:39:42 1892
Klamath Falls 09:28:49 -28.6 Dark Down 26.5 158.6 Low 09:17:56 - 09:39:42 1873
Cedarville 09:28:42 -28.8 Dark Down 27.5 160.1 Low 09:17:49 - 09:39:35 1861
Fall River/Burney 09:28:49 -29.6 Dark Down 27.7 158.8 Low 09:17:56 - 09:39:42 1810
Gimple 09:28:47 -30.2 Dark Down 28.7 159.2 Low 09:17:54 - 09:39:40 1765
Greenville 09:28:47 -30.3 Dark Down 28.6 159.1 Low 09:17:54 - 09:39:40 1763
Portola 09:28:46 -30.4 Dark Down 29.1 159.5 Low 09:17:53 - 09:39:39 1752
Quincy 09:28:48 -30.5 Dark Down 28.8 159.1 Low 09:17:55 - 09:39:41 1751
Reno 09:28:43 -30.4 Dark Down 29.5 160.1 Low 09:17:50 - 09:39:36 1747
Carson City 09:28:44 -30.8 Dark Down 29.8 160.1 Low 09:17:51 - 09:39:37 1725
Yerington 09:28:41 -30.7 Dark Down 30.2 160.7 Up 09:17:48 - 09:39:34 1724
Gardnerville 09:28:43 -31.0 Dark Down 30.1 160.1 Up 09:17:50 - 09:39:36 1711
Hawthorne 09:28:38 -30.9 Dark Down 30.7 161.2 Up 09:17:45 - 09:39:31 1704
Lee Vining 09:28:41 -31.6 Dark Down 31.2 160.5 Up 09:17:48 - 09:39:34 1660
Bishop 09:28:37 -31.9 Dark Down 31.9 161.2 Up 09:17:44 - 09:39:30 1634
Beatty 09:28:30 -31.7 Dark Down 32.7 162.8 Up 09:17:37 - 09:39:23 1632
Patrick 09:28:16 -31.7 Dark Down 34.8 165.7 Up 09:17:23 - 09:39:09 1582
Laughlin/Bullhead City 09:28:20 -32.3 Dark Down 34.9 164.9 Up 09:17:27 - 09:39:13 1553
Lake Havasu City 09:28:18 -32.7 Dark Down 35.6 165.0 Up 09:17:25 - 09:39:11 1512
George/Scottsdale 09:28:06 -32.2 Dark Down 36.8 167.7 Up 09:17:13 - 09:38:59 1499
Idyllwild 09:28:31 -34.4 Dark Down 35.8 162.2 Up 09:17:38 - 09:39:24 1419
Wildwood 09:28:41 -34.8 Dark Down 34.9 160.3 Up 09:17:48 - 09:39:34 1409
Calipatria 09:28:26 -34.4 Dark Down 36.6 163.4 Up 09:17:33 - 09:39:19 1396
Yuma 09:28:21 -34.4 Dark Down 37.3 164.4 Up 09:17:28 - 09:39:14 1381

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 578992, (2027/05/04 09:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 16.12 128
35Eta Oph      17:10:22.7 -15:43:29  2.6  5.54 118
PPM 233026     17:24:37.1 -18:26:45  6.4  1.37 115
PPM 233265     17:34:33.4 -18:13:15  7.4  1.04 113
PPM 233164     17:30:29.6 -18:47:12  9.4  0.25 114
578992         17:30:21.8 -18:32:25 16.0       114
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:27:53 UT

Marc W. Buie, Southwest Research Institute

RECON