RECON: TNO occultation with 523640

Event between (523640) 10RO64 and star GA0940:00192757 with event index number of 2626196

Geocentric closest approach at 2027/11/25 06:23:02 UTC

J2000 position of star is 02:15:33.7 +05:04:01
Equinox of date position of star is 02:16:49.3 +05:10:41
Stellar brightness G=12.9, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 166 degrees from the moon. Moon is 9% illuminated.
Apparent brightness V=21.3

[RECON map]
Object is 41.4 AU from the Sun and 40.6 AU from the Earth.
Apparent velocity is 21.8 km/sec on the sky relative to the star, or, 2.7 arcsec/hr.
The 1-sigma error in the time of the event is 86 seconds.
The 1-sigma cross-track error in the shadow position is 1694 km.
The sky-plane scale is 29419.8 km/arcsec.

The object has an absolute magnitude Hv=5.1
Diameter=539.5 km assuming a 5% albedo -- 26.2 sec chord
Diameter=220.3 km assuming a 30% albedo -- 10.7 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523640, (2027/11/25 06:22UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:31.5 +16:33:48  0.8 36.24 136
68Omi Cet      02:20:45.5 -02:51:07  2.0  8.10 159
PPM 145462     02:19:28.4 +01:53:16  5.6  3.36 163
PPM 145443     02:17:53.9 +04:45:16  8.3  0.49 165
PPM 145419     02:16:26.4 +04:59:55 10.0  0.24 166
523640         02:17:01.3 +05:11:44 12.9       165
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 27.7 km RECON observability=1.0 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)
Kamloops 06:22:09 -55.6 Dark Down 44.2 187.3 Up 06:14:30 - 06:29:47 7811
Sleaford 06:21:25 -58.1 Dark Down 40.3 205.9 Up 06:13:46 - 06:29:03 7764
Kelowna 06:22:06 -56.6 Dark Down 44.9 188.7 Up 06:14:27 - 06:29:44 7736
Peachland 06:22:07 -56.5 Dark Down 45.0 188.3 Up 06:14:28 - 06:29:45 7731
Summerland 06:22:06 -56.7 Dark Down 45.2 188.4 Up 06:14:28 - 06:29:45 7718
Penticton 06:22:06 -56.8 Dark Down 45.2 188.6 Up 06:14:28 - 06:29:45 7711
Oliver 06:22:06 -57.1 Dark Down 45.6 188.6 Up 06:14:28 - 06:29:45 7683
Victoria 06:22:19 -55.9 Dark Down 46.5 183.3 Up 06:14:41 - 06:29:58 7679
Anarchist Mountain Observatory 06:22:06 -57.3 Dark Down 45.7 188.9 Up 06:14:27 - 06:29:44 7667
Okanogan 06:22:07 -57.7 Dark Down 46.4 188.7 Up 06:14:28 - 06:29:45 7617
Brewster 06:22:07 -57.8 Dark Down 46.7 188.5 Up 06:14:29 - 06:29:46 7598
Manson/Chelan 06:22:09 -57.8 Dark Down 46.9 188.0 Up 06:14:30 - 06:29:47 7586
Wenatchee 06:22:09 -58.1 Dark Down 47.4 187.8 Up 06:14:31 - 06:29:48 7549
Ellensburg 06:22:11 -58.4 Dark Down 47.8 187.6 Up 06:14:32 - 06:29:49 7518
Yakima 06:22:11 -58.7 Dark Down 48.2 187.6 Up 06:14:32 - 06:29:49 7484
Toppenish/White Swan 06:22:10 -58.9 Dark Down 48.4 187.9 Up 06:14:32 - 06:29:49 7464
PNWRO 06:22:05 -59.8 Dark Down 48.6 190.2 Up 06:14:27 - 06:29:44 7413
The Dalles 06:22:13 -59.1 Dark Down 49.3 186.8 Up 06:14:34 - 06:29:51 7409
Maupin 06:22:13 -59.4 Dark Down 49.7 187.0 Up 06:14:34 - 06:29:51 7373
Sisters 06:22:15 -59.8 Dark Down 50.6 186.4 Up 06:14:37 - 06:29:54 7305
Bend 06:22:14 -60.1 Dark Down 50.8 186.8 Up 06:14:36 - 06:29:53 7281
Oregon Observatory 06:22:15 -60.2 Dark Down 51.0 186.7 Up 06:14:37 - 06:29:54 7268
Chiloquin 06:22:17 -60.8 Dark Down 52.3 186.2 Up 06:14:39 - 06:29:56 7159
Klamath Falls 06:22:17 -61.1 Dark Down 52.7 186.4 Up 06:14:38 - 06:29:55 7128
Cedarville 06:22:11 -62.5 Dark Down 53.2 189.1 Up 06:14:33 - 06:29:50 7043
Fall River/Burney 06:22:16 -62.1 Dark Down 53.8 187.2 Up 06:14:38 - 06:29:55 7017
Greenville 06:22:15 -62.9 Dark Down 54.7 188.1 Up 06:14:37 - 06:29:54 6929
Gimple 06:22:15 -63.0 Dark Down 54.7 188.3 Up 06:14:36 - 06:29:53 6928
Quincy 06:22:15 -63.1 Dark Down 54.9 188.2 Up 06:14:37 - 06:29:54 6911
Portola 06:22:13 -63.4 Dark Down 54.9 189.0 Up 06:14:35 - 06:29:52 6893
Reno 06:22:11 -64.0 Dark Down 55.1 190.2 Up 06:14:32 - 06:29:49 6859
Carson City 06:22:11 -64.2 Dark Down 55.5 190.3 Up 06:14:32 - 06:29:49 6826
Gardnerville 06:22:11 -64.4 Dark Down 55.7 190.4 Up 06:14:32 - 06:29:49 6802
Yerington 06:22:08 -64.7 Dark Down 55.6 191.4 Up 06:14:30 - 06:29:47 6798
Hawthorne 06:22:07 -65.3 Dark Down 55.9 192.5 Up 06:14:28 - 06:29:45 6748
Dunrhomin 06:21:16 -69.7 Dark Down 50.4 212.7 Up 06:13:38 - 06:28:55 6729
Nikitin 06:21:16 -69.8 Dark Down 50.5 212.8 Up 06:13:38 - 06:28:55 6712
CU-SBO 06:21:17 -69.9 Dark Down 50.6 212.7 Up 06:13:38 - 06:28:55 6707
Lee Vining 06:22:09 -65.4 Dark Down 56.6 191.8 Up 06:14:30 - 06:29:47 6703
Bishop 06:22:06 -66.2 Dark Down 57.0 193.3 Up 06:14:28 - 06:29:45 6636
Beatty 06:22:00 -67.5 Dark Down 57.2 196.4 Up 06:14:22 - 06:29:39 6568
Patrick 06:21:49 -70.2 Dark Down 57.8 202.2 Up 06:14:11 - 06:29:28 6383
Laughlin/Bullhead City 06:21:52 -69.9 Dark Down 58.2 201.1 Up 06:14:13 - 06:29:30 6370
Wildwood 06:22:09 -68.0 Dark Down 60.3 194.2 Up 06:14:30 - 06:29:47 6327
Lake Havasu City 06:21:51 -70.5 Dark Down 58.8 202.0 Up 06:14:13 - 06:29:30 6301
Idyllwild 06:22:01 -69.5 Dark Down 60.2 198.0 Up 06:14:22 - 06:29:39 6263
George/Scottsdale 06:21:41 -72.5 Dark Down 58.7 206.9 Up 06:14:03 - 06:29:20 6189
Calipatria 06:21:56 -70.6 Dark Down 60.4 200.6 Up 06:14:18 - 06:29:35 6185
Yuma 06:21:53 -71.5 Dark Down 60.6 202.6 Up 06:14:14 - 06:29:31 6129

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 523640, (2027/11/25 06:22UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 36.24 136
68Omi Cet      02:19:20.8 -02:58:45  2.0  8.10 159
PPM 145462     02:18:02.0 +01:45:36  5.6  3.36 163
PPM 145443     02:16:26.4 +04:37:34  8.3  0.49 165
PPM 145419     02:14:58.8 +04:52:11 10.0  0.24 166
523640         02:15:33.7 +05:04:01 12.9       166
Positions are for J2000

Event circumstances last updated at 2024/01/30 03:35:00 UT

Marc W. Buie, Southwest Research Institute

RECON