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 05:32:42 UTC

J2000 position of star is 23:17:41.6 -02:11:28
Equinox of date position of star is 23:18:55.4 -02:03:37
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 142 seconds.
The 1-sigma cross-track error in the shadow position is 1743 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 -- 30.7 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 26.8 km RECON observability=1.0 and success probability=22.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 05:30:11 -42.4 Dark Down 36.9 187.4 Up 05:17:51 - 05:42:31 -840
Victoria 05:30:26 -42.3 Dark Up 39.2 183.8 Up 05:18:06 - 05:42:46 -882
Peachland 05:30:10 -43.4 Dark Down 37.8 188.2 Up 05:17:50 - 05:42:30 -919
Kelowna 05:30:09 -43.4 Dark Down 37.6 188.6 Up 05:17:49 - 05:42:29 -922
Summerland 05:30:10 -43.5 Dark Down 37.9 188.4 Up 05:17:50 - 05:42:30 -932
Penticton 05:30:10 -43.6 Dark Down 38.0 188.5 Up 05:17:50 - 05:42:30 -940
Oliver 05:30:10 -43.8 Dark Down 38.3 188.6 Up 05:17:50 - 05:42:30 -964
Anarchist Mountain Observatory 05:30:10 -44.0 Dark Down 38.5 188.8 Up 05:17:50 - 05:42:30 -981
Okanogan 05:30:11 -44.4 Dark Down 39.1 188.6 Up 05:17:51 - 05:42:31 -1018
Brewster 05:30:13 -44.4 Dark Down 39.4 188.4 Up 05:17:53 - 05:42:33 -1029
Manson/Chelan 05:30:14 -44.4 Dark Up 39.6 188.0 Up 05:17:54 - 05:42:34 -1031
Wenatchee 05:30:15 -44.6 Dark Up 40.1 187.8 Up 05:17:55 - 05:42:35 -1058
Ellensburg 05:30:17 -44.8 Dark Up 40.6 187.6 Up 05:17:57 - 05:42:37 -1079
Yakima 05:30:18 -45.0 Dark Up 41.0 187.6 Up 05:17:58 - 05:42:38 -1107
Toppenish/White Swan 05:30:18 -45.3 Dark Up 41.2 187.8 Up 05:17:58 - 05:42:38 -1127
The Dalles 05:30:21 -45.3 Dark Up 42.0 186.9 Up 05:18:01 - 05:42:41 -1155
Sleaford 05:29:21 -46.8 Dark Down 33.1 204.3 Up 05:17:01 - 05:41:41 -1183
Maupin 05:30:22 -45.6 Dark Up 42.4 187.1 Up 05:18:02 - 05:42:42 -1188
PNWRO 05:30:12 -46.3 Dark Up 41.4 189.8 Up 05:17:52 - 05:42:32 -1204
Sisters 05:30:25 -45.9 Dark Up 43.3 186.5 Up 05:18:05 - 05:42:45 -1233
Bend 05:30:25 -46.2 Dark Up 43.5 186.9 Up 05:18:05 - 05:42:45 -1259
Oregon Observatory 05:30:25 -46.2 Dark Up 43.7 186.8 Up 05:18:05 - 05:42:45 -1267
Chiloquin 05:30:29 -46.7 Dark Up 45.1 186.3 Up 05:18:09 - 05:42:49 -1348
Klamath Falls 05:30:29 -47.0 Dark Up 45.4 186.5 Up 05:18:09 - 05:42:49 -1376
Fall River/Burney 05:30:29 -47.9 Dark Up 46.5 187.2 Up 05:18:09 - 05:42:49 -1478
Cedarville 05:30:24 -48.3 Dark Up 45.9 188.9 Up 05:18:04 - 05:42:44 -1487
Greenville 05:30:29 -48.6 Dark Up 47.4 188.0 Up 05:18:09 - 05:42:49 -1564
Gimple 05:30:29 -48.7 Dark Up 47.4 188.1 Up 05:18:09 - 05:42:49 -1567
Quincy 05:30:30 -48.8 Dark Up 47.6 188.0 Up 05:18:10 - 05:42:50 -1580
Portola 05:30:28 -49.1 Dark Up 47.7 188.7 Up 05:18:08 - 05:42:48 -1607
Reno 05:30:25 -49.7 Dark Up 47.8 189.7 Up 05:18:05 - 05:42:45 -1652
Carson City 05:30:26 -49.9 Dark Up 48.2 189.8 Up 05:18:06 - 05:42:46 -1681
Gardnerville 05:30:26 -50.1 Dark Up 48.4 189.9 Up 05:18:06 - 05:42:46 -1702
Yerington 05:30:24 -50.4 Dark Up 48.3 190.8 Up 05:18:04 - 05:42:44 -1721
Hawthorne 05:30:22 -51.0 Dark Up 48.7 191.7 Up 05:18:02 - 05:42:42 -1778
Lee Vining 05:30:25 -51.0 Dark Up 49.3 191.1 Up 05:18:05 - 05:42:45 -1804
Bishop 05:30:23 -51.8 Dark Up 49.8 192.3 Up 05:18:03 - 05:42:43 -1880
Beatty 05:30:16 -53.1 Dark Up 49.9 194.9 Up 05:17:56 - 05:42:36 -1982
Dunrhomin 05:29:24 -57.2 Dark Down 43.4 209.4 Up 05:17:04 - 05:41:44 -2138
Wildwood 05:30:29 -53.4 Dark Up 53.0 192.9 Up 05:18:09 - 05:42:49 -2142
Nikitin 05:29:23 -57.3 Dark Down 43.6 209.5 Up 05:17:03 - 05:41:43 -2153
CU-SBO 05:29:24 -57.3 Dark Down 43.7 209.4 Up 05:17:04 - 05:41:44 -2156
Laughlin/Bullhead City 05:30:09 -55.6 Dark Up 51.1 198.8 Up 05:17:49 - 05:42:29 -2214
Patrick 05:30:06 -55.9 Dark Up 50.7 199.8 Up 05:17:46 - 05:42:26 -2221
Idyllwild 05:30:22 -54.9 Dark Up 53.0 196.1 Up 05:18:02 - 05:42:42 -2249
Lake Havasu City 05:30:09 -56.1 Dark Up 51.6 199.5 Up 05:17:49 - 05:42:29 -2281
Calipatria 05:30:17 -56.1 Dark Up 53.2 198.2 Up 05:17:57 - 05:42:37 -2350
Yuma 05:30:13 -56.9 Dark Up 53.4 199.8 Up 05:17:53 - 05:42:33 -2424
George/Scottsdale 05:29:59 -58.2 Dark Up 51.6 203.5 Up 05:17:39 - 05:42:19 -2448

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 2023/12/03 04:31:03 UT

Marc W. Buie, Southwest Research Institute

RECON