RECON: TNO occultation with 523741

Event between (523741) 14TY85 and star GA1220:01191571 with event index number of 2324105

Geocentric closest approach at 2028/03/24 02:45:03 UTC

J2000 position of star is 04:45:10.1 +33:06:36
Equinox of date position of star is 04:46:43.6 +33:09:08
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 92 degrees from the moon. Moon is 4% illuminated.
Apparent brightness V=22.1

[RECON map]
Object is 33.1 AU from the Sun and 33.4 AU from the Earth.
Apparent velocity is 15.4 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 140 seconds.
The 1-sigma cross-track error in the shadow position is 1536 km.
The sky-plane scale is 24247.6 km/arcsec.

The object has an absolute magnitude Hv=6.7
Diameter=275.4 km assuming a 5% albedo -- 18.3 sec chord
Diameter=112.4 km assuming a 30% albedo -- 7.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523741, (2028/03/24 02:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:32.6 +16:33:50  0.8 16.73  89
3Iot Aur       04:58:50.2 +33:12:29  2.7  2.48  95
PPM 069605     04:45:38.1 +32:54:57  6.5  0.38  92
PPM 069623     04:47:04.4 +32:58:07 10.6  0.19  92
523741         04:47:00.2 +33:09:35 15.9        93
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 0.0 km RECON observability=0.1 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 02:47:43 -13.4 AT Down 51.5 259.2 Up 02:35:34 - 02:59:51 7955
Kamloops 02:47:01 -5.0 CT Down 60.7 245.6 Up 02:34:52 - 02:59:09 7393
Kelowna 02:47:07 -5.7 CT Down 60.4 248.1 Up 02:34:59 - 02:59:16 7343
Peachland 02:47:06 -5.5 CT Down 60.7 247.9 Up 02:34:58 - 02:59:15 7324
Summerland 02:47:07 -5.6 CT Down 60.7 248.3 Up 02:34:59 - 02:59:16 7313
Penticton 02:47:07 -5.7 CT Down 60.6 248.5 Up 02:34:59 - 02:59:16 7310
Oliver 02:47:09 -5.7 CT Down 60.7 249.1 Up 02:35:00 - 02:59:17 7277
Anarchist Mountain Observatory 02:47:11 -5.9 CT Down 60.7 249.6 Up 02:35:02 - 02:59:19 7267
Okanogan 02:47:12 -5.9 CT Down 61.0 250.5 Up 02:35:03 - 02:59:20 7199
Brewster 02:47:13 -5.8 CT Down 61.2 250.7 Up 02:35:04 - 02:59:21 7168
Manson/Chelan 02:47:12 -5.6 CT Down 61.5 250.6 Up 02:35:03 - 02:59:20 7138
Victoria 02:46:56 -3.3 CT Down 63.4 245.4 Up 02:34:48 - 02:59:05 7106
Wenatchee 02:47:13 -5.5 CT Down 61.8 251.3 Up 02:35:04 - 02:59:21 7087
Ellensburg 02:47:13 -5.4 CT Down 62.1 251.8 Up 02:35:05 - 02:59:22 7042
Yakima 02:47:15 -5.5 CT Down 62.2 252.5 Up 02:35:06 - 02:59:23 7002
PNWRO 02:47:23 -6.7 NT Down 61.2 255.4 Up 02:35:15 - 02:59:32 6997
Toppenish/White Swan 02:47:16 -5.6 CT Down 62.2 253.1 Up 02:35:07 - 02:59:24 6987
Dunrhomin 02:48:38 -18.0 Dark Down 51.5 274.9 Up 02:36:30 - 03:00:47 6963
Nikitin 02:48:38 -18.1 Dark Down 51.5 275.1 Up 02:36:29 - 03:00:46 6946
CU-SBO 02:48:39 -18.1 Dark Down 51.5 275.2 Up 02:36:30 - 03:00:47 6936
The Dalles 02:47:15 -5.2 CT Down 62.9 253.6 Up 02:35:07 - 02:59:24 6888
Maupin 02:47:18 -5.3 CT Down 62.9 254.5 Up 02:35:09 - 02:59:26 6851
Sisters 02:47:18 -5.1 CT Down 63.5 255.7 Up 02:35:10 - 02:59:27 6751
Bend 02:47:21 -5.3 CT Down 63.4 256.5 Up 02:35:12 - 02:59:29 6735
Oregon Observatory 02:47:21 -5.2 CT Down 63.5 256.7 Up 02:35:12 - 02:59:29 6714
Chiloquin 02:47:23 -5.1 CT Down 64.1 258.9 Up 02:35:15 - 02:59:32 6572
Klamath Falls 02:47:25 -5.2 CT Down 64.1 259.6 Up 02:35:16 - 02:59:33 6541
Cedarville 02:47:33 -6.5 NT Down 63.0 262.5 Up 02:35:25 - 02:59:42 6524
Fall River/Burney 02:47:30 -5.7 CT Down 64.0 262.4 Up 02:35:21 - 02:59:38 6437
Gimple 02:47:35 -6.2 NT Down 63.7 264.7 Up 02:35:26 - 02:59:43 6364
Greenville 02:47:34 -6.1 NT Down 63.7 264.6 Up 02:35:26 - 02:59:43 6362
Portola 02:47:38 -6.5 NT Down 63.4 265.7 Up 02:35:29 - 02:59:46 6345
Quincy 02:47:36 -6.2 NT Down 63.7 265.0 Up 02:35:27 - 02:59:44 6342
Reno 02:47:42 -7.1 NT Down 62.9 266.7 Up 02:35:34 - 02:59:51 6341
Yerington 02:47:46 -7.7 NT Down 62.4 268.2 Up 02:35:38 - 02:59:55 6309
Carson City 02:47:43 -7.2 NT Down 62.9 267.4 Up 02:35:35 - 02:59:52 6306
Gardnerville 02:47:44 -7.2 NT Down 62.8 267.9 Up 02:35:35 - 02:59:52 6284
Hawthorne 02:47:50 -8.2 NT Down 62.0 269.5 Up 02:35:41 - 02:59:58 6282
Lee Vining 02:47:50 -7.9 NT Down 62.3 270.2 Up 02:35:41 - 02:59:58 6208
Beatty 02:48:04 -9.9 NT Down 60.4 273.5 Up 02:35:55 - 03:00:12 6189
Bishop 02:47:55 -8.6 NT Down 61.7 271.8 Up 02:35:47 - 03:00:04 6175
Patrick 02:48:21 -12.6 AT Down 57.9 277.4 Up 02:36:13 - 03:00:30 6155
Laughlin/Bullhead City 02:48:20 -12.0 AT Down 58.4 277.5 Up 02:36:11 - 03:00:28 6103
George/Scottsdale 02:48:37 -14.6 AT Down 55.9 280.7 Up 02:36:29 - 03:00:46 6072
Lake Havasu City 02:48:24 -12.4 AT Down 58.1 278.6 Up 02:36:15 - 03:00:32 6047
Idyllwild 02:48:15 -10.5 NT Down 60.0 279.1 Up 02:36:07 - 03:00:24 5878
Calipatria 02:48:22 -11.6 NT Down 58.9 280.4 Up 02:36:13 - 03:00:30 5864
Yuma 02:48:27 -12.5 AT Down 58.0 281.4 Up 02:36:19 - 03:00:36 5858
Wildwood 02:48:06 -8.9 NT Down 61.6 277.8 Up 02:35:57 - 03:00:14 5842

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 523741, (2028/03/24 02:41UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 16.73  89
3Iot Aur       04:56:59.6 +33:09:58  2.7  2.48  95
PPM 069605     04:43:48.2 +32:51:55  6.5  0.38  92
PPM 069623     04:45:14.4 +32:55:08 10.6  0.19  92
523741         04:45:10.1 +33:06:36 15.9        92
Positions are for J2000

Event circumstances last updated at 2023/12/24 04:38:19 UT

Marc W. Buie, Southwest Research Institute

RECON