RECON: TNO occultation with 523655

Event between (523655) 11VJ24 and star GA1120:03152965 with event index number of 2680641

Geocentric closest approach at 2029/01/17 11:13:09 UTC

J2000 position of star is 09:28:34.7 +23:32:17
Equinox of date position of star is 09:29:57.8 +23:25:53
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 163 degrees from the moon. Moon is 8% illuminated.
Apparent brightness V=20.9

[RECON map]
Object is 32.0 AU from the Sun and 31.1 AU from the Earth.
Apparent velocity is 22.7 km/sec on the sky relative to the star, or, 3.6 arcsec/hr.
The 1-sigma error in the time of the event is 100 seconds.
The 1-sigma cross-track error in the shadow position is 1649 km.
The sky-plane scale is 22541.9 km/arcsec.

The object has an absolute magnitude Hv=5.8
Diameter=411.2 km assuming a 5% albedo -- 18.5 sec chord
Diameter=167.9 km assuming a 30% albedo -- 7.6 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 523655, (2029/01/17 11:13UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:55.1 +11:49:27  1.3 14.94 176
4Lam Leo       09:33:22.3 +22:50:18  4.3  0.92 164
PPM 099598     09:29:42.5 +23:09:25  8.4  0.28 163
PPM 099604     09:30:22.5 +23:40:39 10.0  0.27 163
523655         09:30:14.3 +23:24:37 15.4       163
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 18.8 km RECON observability=1.0 and success probability=39.3%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 11:12:24 -34.7 Dark Down 49.8 239.2 Up 11:03:35 - 11:21:13 1751
Kamloops 11:12:52 -43.6 Dark Down 57.6 221.7 Up 11:04:03 - 11:21:41 1157
Kelowna 11:12:48 -43.4 Dark Down 57.8 223.9 Up 11:03:59 - 11:21:37 1123
Peachland 11:12:48 -43.6 Dark Down 58.0 223.5 Up 11:03:59 - 11:21:37 1104
Summerland 11:12:47 -43.6 Dark Down 58.1 223.9 Up 11:03:58 - 11:21:36 1095
Penticton 11:12:47 -43.6 Dark Down 58.1 224.1 Up 11:03:58 - 11:21:36 1094
Oliver 11:12:46 -43.7 Dark Down 58.3 224.5 Up 11:03:57 - 11:21:35 1066
Anarchist Mountain Observatory 11:12:45 -43.6 Dark Down 58.4 225.0 Up 11:03:56 - 11:21:34 1059
Okanogan 11:12:44 -44.0 Dark Down 58.9 225.4 Up 11:03:55 - 11:21:33 1000
Brewster 11:12:43 -44.2 Dark Down 59.2 225.4 Up 11:03:54 - 11:21:32 971
Manson/Chelan 11:12:44 -44.5 Dark Down 59.5 225.1 Up 11:03:55 - 11:21:33 941
Dunrhomin 11:11:42 -35.6 Dark Down 54.2 253.8 Up 11:02:53 - 11:20:31 919
Nikitin 11:11:41 -35.6 Dark Down 54.3 254.0 Up 11:02:52 - 11:20:30 904
Wenatchee 11:12:43 -44.8 Dark Down 60.0 225.4 Up 11:03:54 - 11:21:32 896
CU-SBO 11:11:41 -35.7 Dark Down 54.3 254.0 Up 11:02:52 - 11:20:30 895
Victoria 11:12:55 -46.3 Dark Down 60.5 219.2 Up 11:04:06 - 11:21:44 881
Ellensburg 11:12:43 -45.1 Dark Down 60.4 225.5 Up 11:03:54 - 11:21:32 855
PNWRO 11:12:35 -44.4 Dark Down 60.2 229.3 Up 11:03:46 - 11:21:24 833
Yakima 11:12:41 -45.3 Dark Down 60.7 226.0 Up 11:03:52 - 11:21:30 821
Toppenish/White Swan 11:12:40 -45.2 Dark Down 60.7 226.6 Up 11:03:51 - 11:21:29 809
The Dalles 11:12:40 -46.0 Dark Down 61.7 226.3 Up 11:03:51 - 11:21:29 715
Maupin 11:12:39 -46.1 Dark Down 61.9 227.1 Up 11:03:50 - 11:21:28 684
Sisters 11:12:38 -46.7 Dark Down 62.7 227.5 Up 11:03:49 - 11:21:27 591
Bend 11:12:36 -46.6 Dark Down 62.8 228.2 Up 11:03:47 - 11:21:25 581
Oregon Observatory 11:12:37 -46.7 Dark Down 63.0 228.3 Up 11:03:48 - 11:21:26 561
Chiloquin 11:12:34 -47.4 Dark Down 64.1 229.6 Up 11:03:45 - 11:21:23 432
Cedarville 11:12:27 -46.5 Dark Down 63.7 233.9 Up 11:03:38 - 11:21:16 406
Klamath Falls 11:12:33 -47.5 Dark Down 64.2 230.2 Up 11:03:44 - 11:21:22 405
Fall River/Burney 11:12:29 -47.5 Dark Down 64.8 232.8 Up 11:03:40 - 11:21:18 316
Gimple 11:12:25 -47.4 Dark Down 65.0 235.2 Up 11:03:36 - 11:21:14 257
Greenville 11:12:25 -47.4 Dark Down 65.0 235.0 Up 11:03:36 - 11:21:14 254
Reno 11:12:20 -46.7 Dark Down 64.6 237.8 Up 11:03:31 - 11:21:09 247
Portola 11:12:23 -47.2 Dark Down 64.9 236.3 Up 11:03:34 - 11:21:12 244
Quincy 11:12:24 -47.5 Dark Down 65.1 235.4 Up 11:03:35 - 11:21:13 236
Yerington 11:12:16 -46.4 Dark Down 64.5 239.7 Up 11:03:27 - 11:21:05 225
Carson City 11:12:19 -46.8 Dark Down 64.8 238.5 Up 11:03:30 - 11:21:08 216
Hawthorne 11:12:14 -46.0 Dark Down 64.4 241.3 Up 11:03:25 - 11:21:03 205
Gardnerville 11:12:18 -46.8 Dark Down 64.9 239.0 Up 11:03:29 - 11:21:07 196
Beatty 11:12:03 -44.9 Dark Down 63.8 246.8 Up 11:03:14 - 11:20:52 140
Lee Vining 11:12:14 -46.5 Dark Down 65.0 241.7 Up 11:03:25 - 11:21:03 135
Patrick 11:11:50 -42.7 Dark Down 62.2 252.7 Up 11:03:01 - 11:20:39 134
Bishop 11:12:10 -46.1 Dark Down 64.8 243.8 Up 11:03:21 - 11:20:59 112
Laughlin/Bullhead City 11:11:52 -43.3 Dark Down 62.8 252.4 Up 11:03:03 - 11:20:41 81
George/Scottsdale 11:11:40 -41.2 Dark Down 61.0 257.6 Up 11:02:51 - 11:20:29 75
Lake Havasu City 11:11:49 -43.2 Dark Down 62.8 253.9 Up 11:03:00 - 11:20:38 33
Idyllwild 11:11:54 -45.2 Dark Down 64.9 253.0 Up 11:03:05 - 11:20:43 -141
Yuma 11:11:45 -43.5 Dark Down 63.5 257.1 Up 11:02:56 - 11:20:34 -142
Calipatria 11:11:49 -44.2 Dark Down 64.1 255.4 Up 11:03:00 - 11:20:38 -144
Wildwood 11:12:02 -46.7 Dark Down 66.2 250.1 Up 11:03:13 - 11:20:51 -192

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 523655, (2029/01/17 11:13UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 14.94 176
4Lam Leo       09:31:43.2 +22:58:04  4.3  0.92 164
PPM 099598     09:28:03.0 +23:17:05  8.4  0.28 163
PPM 099604     09:28:42.8 +23:48:20 10.0  0.27 163
523655         09:28:34.7 +23:32:17 15.4       163
Positions are for J2000

Event circumstances last updated at 2024/03/19 04:09:57 UT

Marc W. Buie, Southwest Research Institute

RECON