RECON: TNO occultation with 555916

Event between (555916) 14GB54 and star GA0880:05041352 with event index number of 2485200

Geocentric closest approach at 2027/06/10 08:41:25 UTC

J2000 position of star is 16:49:27.3 -01:47:11
Equinox of date position of star is 16:50:39.7 -01:49:31
Stellar brightness G=14.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 96 degrees from the moon. Moon is 38% illuminated.
Apparent brightness V=22.3

[RECON map]
Object is 28.2 AU from the Sun and 27.2 AU from the Earth.
Apparent velocity is 23.0 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 135 seconds.
The 1-sigma cross-track error in the shadow position is 1387 km.
The sky-plane scale is 19733.3 km/arcsec.

The object has an absolute magnitude Hv=7.8
Diameter=163.7 km assuming a 5% albedo -- 7.2 sec chord
Diameter=66.8 km assuming a 30% albedo -- 3.0 sec chord
Dynamical classification is 3:2E+6:4II
 
 
 
 
 
 

Star training set for 555916, (2027/06/10 08:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:05.7 -26:29:25  0.9 25.11  95
1Del Oph       16:15:47.2 -03:45:46  2.7  8.97  88
16 Oph         16:46:53.5 +00:58:19  6.0  2.98  95
PPM 179917     16:47:49.9 -01:24:31  8.5  0.87  96
PPM 179930     16:50:05.9 -01:54:57  9.5  0.21  96
555916         16:50:52.8 -01:49:56 14.6        97
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 16.0 km RECON observability=1.0 and success probability=25.4%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 08:40:39 -11.9 NT Down 30.4 215.8 Up 08:28:56 - 08:52:22 442
Kamloops 08:41:12 -15.8 AT Down 35.8 199.9 Up 08:29:29 - 08:52:55 222
Kelowna 08:41:08 -16.5 AT Down 36.3 201.2 Up 08:29:25 - 08:52:51 178
Peachland 08:41:09 -16.6 AT Down 36.5 200.9 Up 08:29:26 - 08:52:52 168
Summerland 08:41:08 -16.8 AT Down 36.6 201.0 Up 08:29:25 - 08:52:51 159
Penticton 08:41:08 -16.8 AT Down 36.7 201.2 Up 08:29:25 - 08:52:51 156
Oliver 08:41:07 -17.2 AT Down 37.0 201.3 Up 08:29:24 - 08:52:50 133
Anarchist Mountain Observatory 08:41:07 -17.3 AT Down 37.1 201.5 Up 08:29:24 - 08:52:50 124
Okanogan 08:41:06 -18.0 AT Down 37.8 201.4 Up 08:29:23 - 08:52:49 78
Brewster 08:41:07 -18.3 Dark Down 38.1 201.3 Up 08:29:24 - 08:52:50 58
Victoria 08:41:18 -18.2 Dark Down 38.4 196.7 Up 08:29:35 - 08:53:01 50
Manson/Chelan 08:41:07 -18.5 Dark Down 38.3 200.9 Up 08:29:24 - 08:52:50 40
Wenatchee 08:41:07 -19.0 Dark Down 38.8 200.8 Up 08:29:24 - 08:52:50 6
Ellensburg 08:41:07 -19.4 Dark Down 39.3 200.6 Up 08:29:24 - 08:52:50 -24
Yakima 08:41:07 -19.8 Dark Down 39.7 200.7 Up 08:29:24 - 08:52:50 -53
Toppenish/White Swan 08:41:06 -20.0 Dark Down 39.8 201.0 Up 08:29:23 - 08:52:49 -66
PNWRO 08:41:01 -20.2 Dark Down 39.8 203.0 Up 08:29:18 - 08:52:44 -76
The Dalles 08:41:08 -20.9 Dark Down 40.7 200.3 Up 08:29:25 - 08:52:51 -130
Maupin 08:41:07 -21.3 Dark Down 41.1 200.5 Up 08:29:24 - 08:52:50 -159
Sisters 08:41:07 -22.2 Dark Down 42.1 200.1 Up 08:29:24 - 08:52:50 -227
Bend 08:41:06 -22.4 Dark Down 42.2 200.6 Up 08:29:23 - 08:52:49 -242
Oregon Observatory 08:41:06 -22.6 Dark Down 42.4 200.4 Up 08:29:23 - 08:52:49 -256
Chiloquin 08:41:06 -24.0 Dark Down 43.7 200.3 Up 08:29:23 - 08:52:49 -359
Dunrhomin 08:40:07 -22.6 Dark Down 39.3 221.7 Up 08:28:24 - 08:51:50 -359
Nikitin 08:40:07 -22.8 Dark Down 39.5 221.8 Up 08:28:24 - 08:51:50 -374
CU-SBO 08:40:07 -22.8 Dark Down 39.6 221.7 Up 08:28:24 - 08:51:50 -379
Klamath Falls 08:41:05 -24.3 Dark Down 44.0 200.5 Up 08:29:22 - 08:52:48 -384
Cedarville 08:40:59 -24.8 Dark Down 44.3 202.9 Up 08:29:16 - 08:52:42 -419
Fall River/Burney 08:41:02 -25.4 Dark Down 45.1 201.4 Up 08:29:19 - 08:52:45 -471
Gimple 08:40:59 -26.2 Dark Down 45.7 202.5 Up 08:29:16 - 08:52:42 -536
Greenville 08:40:59 -26.2 Dark Down 45.8 202.4 Up 08:29:16 - 08:52:42 -537
Quincy 08:40:59 -26.4 Dark Down 46.0 202.5 Up 08:29:16 - 08:52:42 -553
Portola 08:40:57 -26.5 Dark Down 45.9 203.2 Up 08:29:14 - 08:52:40 -557
Reno 08:40:55 -26.7 Dark Down 46.0 204.2 Up 08:29:12 - 08:52:38 -571
Carson City 08:40:54 -27.0 Dark Down 46.3 204.3 Up 08:29:11 - 08:52:37 -599
Yerington 08:40:52 -27.1 Dark Down 46.3 205.3 Up 08:29:09 - 08:52:35 -607
Gardnerville 08:40:54 -27.3 Dark Down 46.5 204.5 Up 08:29:11 - 08:52:37 -618
Hawthorne 08:40:49 -27.5 Dark Down 46.5 206.2 Up 08:29:06 - 08:52:32 -638
Lee Vining 08:40:50 -28.1 Dark Down 47.2 205.8 Up 08:29:07 - 08:52:33 -689
Bishop 08:40:46 -28.6 Dark Down 47.5 207.1 Up 08:29:03 - 08:52:29 -730
Beatty 08:40:40 -28.7 Dark Down 47.3 209.5 Up 08:28:57 - 08:52:23 -749
Patrick 08:40:39 -29.5 Dark Down 47.3 214.2 Up 08:28:56 - 08:52:22 -880
Laughlin/Bullhead City 08:40:39 -29.9 Dark Down 47.8 213.4 Up 08:28:56 - 08:52:22 -895
Lake Havasu City 08:40:39 -30.5 Dark Down 48.3 214.2 Up 08:28:56 - 08:52:22 -959
George/Scottsdale 08:40:18 -30.6 Dark Down 47.7 217.8 Up 08:28:35 - 08:52:01 -961
Wildwood 08:40:43 -31.8 Dark Down 50.5 208.5 Up 08:29:00 - 08:52:26 -1008
Idyllwild 08:40:39 -31.8 Dark Down 50.0 211.4 Up 08:28:56 - 08:52:22 -1019
Calipatria 08:40:39 -32.1 Dark Down 50.0 213.4 Up 08:28:56 - 08:52:22 -1075
Yuma 08:40:26 -32.3 Dark Down 49.9 214.9 Up 08:28:43 - 08:52:09 -1082

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 555916, (2027/06/10 08:39UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 25.11  95
1Del Oph       16:14:20.7 -03:41:43  2.7  8.97  88
16 Oph         16:45:29.7 +01:01:13  6.0  2.98  95
PPM 179917     16:46:24.7 -01:21:39  8.5  0.87  96
PPM 179930     16:48:40.3 -01:52:10  9.5  0.21  96
555916         16:49:27.3 -01:47:11 14.6        96
Positions are for J2000

Event circumstances last updated at 2023/03/27 23:17:20 UT

Marc W. Buie, Southwest Research Institute

RECON