RECON: TNO occultation with 523724

Event between (523724) 14MA70 and star GA0860:16951789 with event index number of 2329428

Geocentric closest approach at 2028/10/24 05:32:23 UTC

J2000 position of star is 23:17:41.6 -02:11:28
Equinox of date position of star is 23:18:54.6 -02:03:42
Stellar brightness G=12.4, use SENSEUP=16 with the MallinCam and and exposure time of 250 milli-seconds with the QHY174 camera.
Star is 59 degrees from the moon. Moon is 40% illuminated.
Apparent brightness V=21.6

[RECON map]
Object is 41.5 AU from the Sun and 40.8 AU from the Earth.
Apparent velocity is 17.4 km/sec on the sky relative to the star, or, 2.1 arcsec/hr.
The 1-sigma error in the time of the event is 154 seconds.
The 1-sigma cross-track error in the shadow position is 1800 km.
The sky-plane scale is 29570.4 km/arcsec.

The object has an absolute magnitude Hv=5.3
Diameter=520.0 km assuming a 5% albedo -- 30.5 sec chord
Diameter=212.3 km assuming a 30% albedo -- 12.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 523724, (2028/10/24 05:33UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:14.0 -29:28:07  1.2 27.84  48
Markab         23:06:11.9 +15:21:39  2.5 17.69  65
96 Aqr         23:20:53.5 -04:57:59  5.4  2.96  58
PPM 181601     23:18:04.5 -01:25:40  7.9  0.67  59
PPM 207374     23:18:43.4 -02:07:02 10.0  0.14  59
523724         23:19:10.5 -02:02:00 12.4        60
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 26.7 km RECON observability=1.0 and success probability=18.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:29:52 -42.4 Dark Down 36.9 187.3 Up 05:16:33 - 05:43:12 -1138
Victoria 05:30:06 -42.3 Dark Up 39.2 183.7 Up 05:16:47 - 05:43:26 -1180
Peachland 05:29:51 -43.3 Dark Down 37.8 188.1 Up 05:16:32 - 05:43:11 -1217
Kelowna 05:29:51 -43.4 Dark Down 37.6 188.5 Up 05:16:31 - 05:43:10 -1219
Summerland 05:29:51 -43.5 Dark Down 37.9 188.3 Up 05:16:31 - 05:43:10 -1230
Penticton 05:29:52 -43.6 Dark Down 38.0 188.4 Up 05:16:32 - 05:43:11 -1238
Oliver 05:29:51 -43.8 Dark Down 38.3 188.5 Up 05:16:32 - 05:43:11 -1261
Anarchist Mountain Observatory 05:29:51 -44.0 Dark Down 38.5 188.7 Up 05:16:32 - 05:43:11 -1279
Okanogan 05:29:53 -44.3 Dark Down 39.1 188.5 Up 05:16:34 - 05:43:13 -1315
Brewster 05:29:54 -44.4 Dark Down 39.4 188.3 Up 05:16:34 - 05:43:13 -1327
Manson/Chelan 05:29:55 -44.4 Dark Up 39.6 187.9 Up 05:16:35 - 05:43:14 -1329
Wenatchee 05:29:57 -44.6 Dark Up 40.1 187.7 Up 05:16:37 - 05:43:16 -1356
Ellensburg 05:29:58 -44.7 Dark Up 40.6 187.5 Up 05:16:39 - 05:43:18 -1376
Yakima 05:29:59 -45.0 Dark Up 41.0 187.5 Up 05:16:39 - 05:43:18 -1404
Toppenish/White Swan 05:29:58 -45.2 Dark Up 41.2 187.7 Up 05:16:38 - 05:43:17 -1425
The Dalles 05:30:02 -45.3 Dark Up 42.0 186.8 Up 05:16:43 - 05:43:22 -1452
Sleaford 05:29:02 -46.8 Dark Down 33.1 204.2 Up 05:15:42 - 05:42:21 -1481
Maupin 05:30:03 -45.6 Dark Up 42.4 187.0 Up 05:16:43 - 05:43:22 -1485
PNWRO 05:29:53 -46.2 Dark Up 41.4 189.7 Up 05:16:33 - 05:43:12 -1502
Sisters 05:30:06 -45.8 Dark Up 43.3 186.4 Up 05:16:46 - 05:43:25 -1530
Bend 05:30:06 -46.1 Dark Up 43.5 186.8 Up 05:16:46 - 05:43:25 -1556
Oregon Observatory 05:30:06 -46.2 Dark Up 43.7 186.6 Up 05:16:46 - 05:43:25 -1564
Chiloquin 05:30:10 -46.7 Dark Up 45.1 186.2 Up 05:16:50 - 05:43:29 -1645
Klamath Falls 05:30:11 -46.9 Dark Up 45.4 186.4 Up 05:16:51 - 05:43:30 -1673
Fall River/Burney 05:30:11 -47.8 Dark Up 46.5 187.1 Up 05:16:51 - 05:43:30 -1775
Cedarville 05:30:04 -48.3 Dark Up 45.9 188.7 Up 05:16:45 - 05:43:24 -1784
Greenville 05:30:10 -48.6 Dark Up 47.4 187.9 Up 05:16:51 - 05:43:30 -1861
Gimple 05:30:10 -48.7 Dark Up 47.4 188.0 Up 05:16:51 - 05:43:30 -1865
Quincy 05:30:11 -48.7 Dark Up 47.6 187.9 Up 05:16:51 - 05:43:30 -1877
Portola 05:30:09 -49.1 Dark Up 47.7 188.6 Up 05:16:50 - 05:43:29 -1904
Reno 05:30:06 -49.6 Dark Up 47.8 189.6 Up 05:16:47 - 05:43:26 -1949
Carson City 05:30:07 -49.9 Dark Up 48.2 189.7 Up 05:16:47 - 05:43:26 -1978
Gardnerville 05:30:07 -50.0 Dark Up 48.4 189.8 Up 05:16:48 - 05:43:27 -1999
Yerington 05:30:05 -50.4 Dark Up 48.3 190.7 Up 05:16:45 - 05:43:24 -2018
Hawthorne 05:30:03 -51.0 Dark Up 48.7 191.6 Up 05:16:43 - 05:43:22 -2075
Lee Vining 05:30:06 -51.0 Dark Up 49.3 191.0 Up 05:16:46 - 05:43:25 -2101
Bishop 05:30:04 -51.8 Dark Up 49.8 192.2 Up 05:16:44 - 05:43:23 -2177
Beatty 05:29:57 -53.1 Dark Up 49.9 194.8 Up 05:16:37 - 05:43:16 -2279
Dunrhomin 05:29:04 -57.1 Dark Down 43.5 209.3 Up 05:15:44 - 05:42:23 -2436
Wildwood 05:30:10 -53.3 Dark Up 53.0 192.8 Up 05:16:51 - 05:43:30 -2439
Nikitin 05:29:04 -57.3 Dark Down 43.6 209.4 Up 05:15:45 - 05:42:24 -2450
CU-SBO 05:29:05 -57.3 Dark Down 43.7 209.3 Up 05:15:45 - 05:42:24 -2453
Laughlin/Bullhead City 05:29:49 -55.5 Dark Up 51.1 198.7 Up 05:16:30 - 05:43:09 -2511
Patrick 05:29:46 -55.8 Dark Up 50.7 199.6 Up 05:16:27 - 05:43:06 -2518
Idyllwild 05:30:03 -54.9 Dark Up 53.0 195.9 Up 05:16:43 - 05:43:22 -2546
Lake Havasu City 05:29:50 -56.1 Dark Up 51.7 199.3 Up 05:16:31 - 05:43:10 -2578
Calipatria 05:29:58 -56.0 Dark Up 53.3 198.1 Up 05:16:38 - 05:43:17 -2647
Yuma 05:29:54 -56.9 Dark Up 53.4 199.7 Up 05:16:35 - 05:43:14 -2721
George/Scottsdale 05:29:40 -58.2 Dark Up 51.7 203.4 Up 05:16:20 - 05:42:59 -2744

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 523724, (2028/10/24 05:33UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 27.84  48
Markab         23:04:45.8 +15:12:18  2.5 17.69  65
96 Aqr         23:19:24.3 -05:07:28  5.4  2.96  58
PPM 181601     23:16:35.7 -01:35:07  7.9  0.67  59
PPM 207374     23:17:14.6 -02:16:30 10.0  0.14  59
523724         23:17:41.6 -02:11:28 12.4        59
Positions are for J2000

Event circumstances last updated at 2023/09/04 01:05:00 UT

Marc W. Buie, Southwest Research Institute

RECON