RECON: TNO occultation with 523655

Event between (523655) 11VJ24 and star GA1180:03177023 with event index number of 2572695

Geocentric closest approach at 2023/02/01 02:25:08 UTC

J2000 position of star is 08:31:04.5 +28:25:23
Equinox of date position of star is 08:32:28.6 +28:20:38
Stellar brightness G=13.9, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 42 degrees from the moon. Moon is 82% illuminated.
Apparent brightness V=20.8

[RECON map]
Object is 32.1 AU from the Sun and 31.1 AU from the Earth.
Apparent velocity is 24.2 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 59 seconds.
The 1-sigma cross-track error in the shadow position is 1166 km.
The sky-plane scale is 22564.0 km/arcsec.

The object has an absolute magnitude Hv=5.8
Diameter=411.2 km assuming a 5% albedo -- 17.1 sec chord
Diameter=167.9 km assuming a 30% albedo -- 7.0 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 523655, (2023/02/01 02:25UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.6 +27:58:07  1.1 10.09  32
23Phi2Cnc      08:28:10.5 +26:51:28  6.4  1.77  41
PPM 098788     08:33:41.9 +29:14:22  8.0  0.93  42
PPM 098757     08:31:33.9 +28:00:09  9.0  0.40  42
PPM 098749     08:30:53.6 +28:21:19 11.7  0.35  42
523655         08:32:28.7 +28:20:38 13.9        42
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 20.7 km RECON observability=0.5 and success probability=0.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 02:28:25 -15.3 AT Up 27.7 78.1 Low 02:23:00 - 02:33:50 6709
Victoria 02:28:34 -13.0 AT Up 25.3 74.9 Low 02:23:09 - 02:33:59 6619
Kelowna 02:28:27 -15.8 AT Up 28.1 78.3 Low 02:23:02 - 02:33:52 6612
Peachland 02:28:27 -15.6 AT Up 27.9 78.0 Low 02:23:02 - 02:33:52 6611
Summerland 02:28:28 -15.6 AT Up 27.9 78.0 Low 02:23:03 - 02:33:53 6596
Penticton 02:28:28 -15.7 AT Up 28.0 78.0 Low 02:23:03 - 02:33:53 6586
Oliver 02:28:29 -15.6 AT Up 27.9 77.9 Low 02:23:04 - 02:33:54 6556
Anarchist Mountain Observatory 02:28:29 -15.7 AT Up 28.0 77.9 Low 02:23:04 - 02:33:54 6535
Okanogan 02:28:31 -15.5 AT Up 27.7 77.4 Low 02:23:06 - 02:33:56 6485
Brewster 02:28:32 -15.3 AT Up 27.6 77.1 Low 02:23:07 - 02:33:57 6467
Manson/Chelan 02:28:33 -15.1 AT Up 27.3 76.8 Low 02:23:08 - 02:33:58 6461
Sleaford 02:28:06 -24.3 Dark Up 36.8 89.6 Up 02:22:41 - 02:33:31 6451
Wenatchee 02:28:34 -14.9 AT Up 27.0 76.5 Low 02:23:09 - 02:33:59 6424
Ellensburg 02:28:35 -14.7 AT Up 26.8 76.1 Low 02:23:10 - 02:34:00 6395
Yakima 02:28:37 -14.6 AT Up 26.7 75.9 Low 02:23:12 - 02:34:02 6359
Toppenish/White Swan 02:28:37 -14.7 AT Up 26.8 75.9 Low 02:23:12 - 02:34:02 6334
The Dalles 02:28:40 -14.0 AT Up 26.0 75.0 Low 02:23:15 - 02:34:05 6291
PNWRO 02:28:37 -15.6 AT Up 27.7 76.7 Low 02:23:12 - 02:34:02 6253
Maupin 02:28:41 -14.0 AT Up 26.0 74.9 Low 02:23:16 - 02:34:06 6250
Sisters 02:28:44 -13.5 AT Up 25.4 74.2 Low 02:23:19 - 02:34:09 6188
Bend 02:28:44 -13.6 AT Up 25.6 74.3 Low 02:23:19 - 02:34:09 6157
Oregon Observatory 02:28:44 -13.5 AT Up 25.4 74.1 Low 02:23:19 - 02:34:09 6146
Chiloquin 02:28:48 -13.0 AT Up 24.8 73.3 Low 02:23:23 - 02:34:13 6041
Klamath Falls 02:28:48 -13.0 AT Up 24.7 73.2 Low 02:23:23 - 02:34:13 6007
Cedarville 02:28:49 -14.0 AT Up 25.7 73.8 Low 02:23:24 - 02:34:14 5886
Fall River/Burney 02:28:51 -13.0 AT Up 24.7 72.9 Low 02:23:26 - 02:34:16 5884
Greenville 02:28:53 -13.2 AT Up 24.7 72.7 Low 02:23:28 - 02:34:18 5784
Gimple 02:28:52 -13.2 AT Up 24.8 72.8 Low 02:23:27 - 02:34:17 5781
Quincy 02:28:53 -13.1 AT Up 24.7 72.6 Low 02:23:28 - 02:34:18 5765
Portola 02:28:53 -13.5 AT Up 25.0 72.8 Low 02:23:28 - 02:34:18 5736
Reno 02:28:53 -13.9 AT Up 25.4 73.1 Low 02:23:28 - 02:34:18 5688
Carson City 02:28:53 -13.9 AT Up 25.3 72.9 Low 02:23:28 - 02:34:18 5653
Gardnerville 02:28:53 -13.8 AT Up 25.3 72.8 Low 02:23:28 - 02:34:18 5628
Yerington 02:28:53 -14.3 AT Up 25.7 73.2 Low 02:23:28 - 02:34:18 5611
Hawthorne 02:28:54 -14.6 AT Up 26.0 73.2 Low 02:23:29 - 02:34:19 5548
Lee Vining 02:28:55 -14.1 AT Up 25.4 72.7 Low 02:23:30 - 02:34:20 5512
Bishop 02:28:55 -14.6 AT Up 25.8 72.8 Low 02:23:30 - 02:34:20 5428
Beatty 02:28:53 -15.8 AT Up 26.9 73.4 Low 02:23:28 - 02:34:18 5324
Dunrhomin 02:28:31 -25.1 Dark Up 36.4 81.4 Up 02:23:06 - 02:33:56 5285
Nikitin 02:28:31 -25.1 Dark Up 36.4 81.2 Up 02:23:06 - 02:33:56 5267
CU-SBO 02:28:31 -25.0 Dark Up 36.3 81.1 Up 02:23:06 - 02:33:56 5262
Wildwood 02:29:02 -13.8 AT Up 24.7 71.2 Low 02:23:37 - 02:34:27 5118
Laughlin/Bullhead City 02:28:54 -17.2 AT Up 28.1 73.5 Low 02:23:29 - 02:34:19 5076
Patrick 02:28:54 -17.9 AT Up 28.8 74.0 Low 02:23:29 - 02:34:19 5075
Idyllwild 02:29:00 -15.3 AT Up 26.0 71.9 Low 02:23:35 - 02:34:25 5012
Lake Havasu City 02:28:55 -17.4 AT Up 28.1 73.3 Low 02:23:30 - 02:34:20 5000
Calipatria 02:28:59 -16.1 AT Up 26.8 72.1 Low 02:23:34 - 02:34:24 4907
George/Scottsdale 02:28:53 -19.2 Dark Up 29.9 73.9 Low 02:23:28 - 02:34:18 4835
Yuma 02:28:59 -16.8 AT Up 27.4 72.3 Low 02:23:34 - 02:34:24 4831

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, (2023/02/01 02:25UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 10.09  32
23Phi2Cnc      08:26:47.0 +26:56:06  6.4  1.77  41
PPM 098788     08:32:17.3 +29:19:09  8.0  0.93  42
PPM 098757     08:30:09.9 +28:04:52  9.0  0.40  42
PPM 098749     08:29:29.3 +28:26:01 11.7  0.35  42
523655         08:31:04.5 +28:25:23 13.9        42
Positions are for J2000

Event circumstances last updated at 2023/01/23 03:10:44 UT

Marc W. Buie, Southwest Research Institute

RECON