RECON: TNO occultation with 555632

Event between (555632) 14BZ57 and star GA0720:04487327 with event index number of 2471142

Geocentric closest approach at 2027/03/07 08:49:56 UTC

J2000 position of star is 10:11:49.5 -16:37:22
Equinox of date position of star is 10:12:59.6 -16:44:35
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 155 degrees from the moon. Moon is 1% illuminated.
Apparent brightness V=20.6

[RECON map]
Object is 37.0 AU from the Sun and 36.1 AU from the Earth.
Apparent velocity is 24.8 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 78 seconds.
The 1-sigma cross-track error in the shadow position is 1654 km.
The sky-plane scale is 26181.3 km/arcsec.

The object has an absolute magnitude Hv=4.9
Diameter=608.2 km assuming a 5% albedo -- 24.8 sec chord
Diameter=248.3 km assuming a 30% albedo -- 10.1 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 555632, (2027/03/07 08:48UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:49.1 +11:50:00  1.3 28.60 175
Alphard        09:28:55.4 -08:46:40  2.0 13.40 158
PPM 222476     10:08:27.8 -17:16:33  5.1  1.23 154
PPM 222575     10:12:15.7 -17:03:56  7.0  0.37 154
PPM 222602     10:13:21.0 -17:04:35  9.6  0.32 154
555632         10:13:08.2 -16:45:28 15.2       155
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 7.1 km RECON observability=0.9 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)
Sleaford 08:49:56 -39.3 Dark Down 13.6 217.8 Really Low 08:42:54 - 08:56:58 12931
Kamloops 08:50:25 -43.9 Dark Down 19.4 204.6 Really Low 08:43:23 - 08:57:27 12698
Kelowna 08:50:21 -44.6 Dark Down 19.9 205.5 Really Low 08:43:19 - 08:57:23 12691
Peachland 08:50:22 -44.8 Dark Down 20.1 205.3 Low 08:43:20 - 08:57:24 12682
Summerland 08:50:21 -44.9 Dark Down 20.2 205.4 Low 08:43:19 - 08:57:23 12679
Penticton 08:50:20 -44.9 Dark Down 20.3 205.5 Low 08:43:18 - 08:57:22 12679
Oliver 08:50:21 -45.3 Dark Down 20.6 205.6 Low 08:43:19 - 08:57:23 12669
Anarchist Mountain Observatory 08:50:20 -45.4 Dark Down 20.7 205.8 Low 08:43:18 - 08:57:22 12668
Okanogan 08:50:19 -46.1 Dark Down 21.3 205.7 Low 08:43:17 - 08:57:21 12643
Brewster 08:50:20 -46.4 Dark Down 21.6 205.5 Low 08:43:18 - 08:57:22 12631
Manson/Chelan 08:50:20 -46.6 Dark Down 21.9 205.2 Low 08:43:18 - 08:57:22 12617
Wenatchee 08:50:20 -47.1 Dark Down 22.4 205.1 Low 08:43:18 - 08:57:22 12598
Ellensburg 08:50:20 -47.6 Dark Down 22.8 204.9 Low 08:43:18 - 08:57:22 12580
PNWRO 08:50:11 -48.2 Dark Down 23.2 206.7 Low 08:43:09 - 08:57:13 12577
Victoria 08:50:30 -46.4 Dark Down 22.2 201.9 Low 08:43:28 - 08:57:32 12575
Dunrhomin 08:49:22 -48.7 Dark Down 22.5 220.8 Low 08:42:20 - 08:56:24 12567
Yakima 08:50:16 -48.0 Dark Down 23.2 205.0 Low 08:43:14 - 08:57:18 12566
Toppenish/White Swan 08:50:18 -48.1 Dark Down 23.4 205.2 Low 08:43:16 - 08:57:20 12562
Nikitin 08:49:21 -48.9 Dark Down 22.7 220.9 Low 08:42:19 - 08:56:23 12559
CU-SBO 08:49:22 -49.0 Dark Down 22.8 220.8 Low 08:42:20 - 08:56:24 12555
The Dalles 08:50:16 -49.0 Dark Down 24.3 204.5 Low 08:43:14 - 08:57:18 12517
Maupin 08:50:16 -49.4 Dark Down 24.7 204.7 Low 08:43:14 - 08:57:18 12504
Sisters 08:50:16 -50.4 Dark Down 25.6 204.4 Low 08:43:14 - 08:57:18 12461
Bend 08:50:16 -50.5 Dark Down 25.7 204.7 Low 08:43:14 - 08:57:18 12457
Oregon Observatory 08:50:15 -50.7 Dark Down 25.9 204.6 Low 08:43:13 - 08:57:17 12447
Chiloquin 08:50:14 -52.1 Dark Down 27.3 204.5 Low 08:43:12 - 08:57:16 12384
Cedarville 08:50:07 -52.8 Dark Down 27.7 206.4 Low 08:43:05 - 08:57:09 12375
Klamath Falls 08:50:13 -52.4 Dark Down 27.5 204.6 Low 08:43:11 - 08:57:15 12371
Fall River/Burney 08:50:08 -53.5 Dark Down 28.5 205.3 Low 08:43:06 - 08:57:10 12327
Gimple 08:50:06 -54.3 Dark Down 29.2 206.0 Low 08:43:04 - 08:57:08 12297
Greenville 08:50:06 -54.3 Dark Down 29.2 205.9 Low 08:43:04 - 08:57:08 12295
Reno 08:50:00 -54.6 Dark Down 29.3 207.2 Low 08:42:58 - 08:57:02 12292
Portola 08:50:02 -54.5 Dark Down 29.3 206.5 Low 08:43:00 - 08:57:04 12291
Quincy 08:50:04 -54.5 Dark Down 29.4 206.0 Low 08:43:02 - 08:57:06 12286
Yerington 08:49:59 -55.0 Dark Down 29.6 208.0 Low 08:42:57 - 08:57:01 12279
Carson City 08:50:02 -54.9 Dark Down 29.6 207.3 Low 08:43:00 - 08:57:04 12276
Hawthorne 08:49:55 -55.3 Dark Down 29.8 208.7 Low 08:42:53 - 08:56:57 12268
Gardnerville 08:50:00 -55.2 Dark Down 29.8 207.4 Low 08:42:58 - 08:57:02 12265
Lee Vining 08:49:57 -56.0 Dark Down 30.5 208.3 Up 08:42:55 - 08:56:59 12231
Beatty 08:49:47 -56.3 Dark Down 30.5 211.0 Up 08:42:45 - 08:56:49 12226
Bishop 08:49:52 -56.3 Dark Down 30.7 209.2 Up 08:42:50 - 08:56:54 12216
Patrick 08:49:34 -56.6 Dark Down 30.5 214.3 Up 08:42:32 - 08:56:36 12205
Laughlin/Bullhead City 08:49:36 -57.1 Dark Down 31.0 213.7 Up 08:42:34 - 08:56:38 12178
George/Scottsdale 08:49:24 -57.2 Dark Down 30.9 216.8 Up 08:42:22 - 08:56:26 12150
Lake Havasu City 08:49:34 -57.6 Dark Down 31.5 214.1 Up 08:42:32 - 08:56:36 12147
Idyllwild 08:49:39 -59.1 Dark Down 33.2 212.0 Up 08:42:37 - 08:56:41 12059
Calipatria 08:49:32 -59.2 Dark Down 33.2 213.4 Up 08:42:30 - 08:56:34 12047
Yuma 08:49:29 -59.3 Dark Down 33.1 214.5 Up 08:42:27 - 08:56:31 12041
Wildwood 08:49:46 -59.4 Dark Down 33.7 210.0 Up 08:42:44 - 08:56:48 12037

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 555632, (2027/03/07 08:48UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 28.60 175
Alphard        09:27:35.2 -08:39:30  2.0 13.40 158
PPM 222476     10:07:09.5 -17:08:32  5.1  1.23 154
PPM 222575     10:10:57.1 -16:55:51  7.0  0.37 154
PPM 222602     10:12:02.5 -16:56:28  9.6  0.32 154
555632         10:11:49.5 -16:37:22 15.2       155
Positions are for J2000

Event circumstances last updated at 2024/03/19 03:57:54 UT

Marc W. Buie, Southwest Research Institute

RECON