RECON: TNO occultation with 523790

Event between (523790) 15HP9 and star GA0680:13670361 with event index number of 2602837

Geocentric closest approach at 2024/07/02 05:22:43 UTC

J2000 position of star is 17:34:01.6 -20:36:04
Equinox of date position of star is 17:35:29.0 -20:36:58
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 150 degrees from the moon. Moon is 16% illuminated.
Apparent brightness V=22.7

[RECON map]
Object is 16.7 AU from the Sun and 15.7 AU from the Earth.
Apparent velocity is 20.8 km/sec on the sky relative to the star, or, 6.6 arcsec/hr.
The 1-sigma error in the time of the event is 198 seconds.
The 1-sigma cross-track error in the shadow position is 724 km.
The sky-plane scale is 11407.2 km/arcsec.

The object has an absolute magnitude Hv=10.5
Diameter=50.1 km assuming a 5% albedo -- 2.3 sec chord
Diameter=20.5 km assuming a 30% albedo -- 0.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523790, (2024/07/02 05:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:54.8 -26:29:03  0.9 15.90 164
35Eta Oph      17:11:47.1 -15:45:13  2.6  7.44 154
PPM 267109     17:40:13.3 -21:55:30  6.4  1.71 149
PPM 267057     17:37:51.1 -20:59:27  8.4  0.67 149
PPM 267006     17:35:13.9 -20:31:50  9.3  0.10 150
523790         17:35:29.2 -20:36:58 16.4       149
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 4.6 sigma about the mid-time.
The median site spacing is 20.4 km RECON observability=0.5 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)
Sleaford 05:23:14 -11.5 NT Down 17.0 172.3 Really Low 05:08:14 - 05:38:14 3795
Kamloops 05:24:01 -8.2 NT Down 16.1 158.5 Really Low 05:09:01 - 05:39:01 3639
Kelowna 05:23:52 -9.2 NT Down 17.1 159.2 Really Low 05:08:52 - 05:38:52 3620
Peachland 05:24:01 -9.1 NT Down 17.1 158.9 Really Low 05:09:01 - 05:39:01 3609
Summerland 05:24:01 -9.3 NT Down 17.3 159.0 Really Low 05:09:01 - 05:39:01 3604
Penticton 05:24:00 -9.4 NT Down 17.4 159.1 Really Low 05:09:00 - 05:39:00 3602
Oliver 05:24:01 -9.7 NT Down 17.7 159.1 Really Low 05:09:01 - 05:39:01 3588
Anarchist Mountain Observatory 05:24:01 -9.9 NT Down 17.9 159.2 Really Low 05:09:01 - 05:39:01 3584
Okanogan 05:24:02 -10.3 NT Down 18.4 159.0 Really Low 05:09:02 - 05:39:02 3554
Brewster 05:24:03 -10.5 NT Down 18.6 158.7 Really Low 05:09:03 - 05:39:03 3540
Manson/Chelan 05:24:05 -10.5 NT Down 18.8 158.4 Really Low 05:09:05 - 05:39:05 3527
Victoria 05:24:14 -8.7 NT Down 17.3 155.4 Really Low 05:09:14 - 05:39:14 3518
Wenatchee 05:24:06 -10.8 NT Down 19.1 158.1 Really Low 05:09:06 - 05:39:06 3505
Ellensburg 05:24:07 -11.0 NT Down 19.5 157.9 Really Low 05:09:07 - 05:39:07 3484
Yakima 05:24:08 -11.3 NT Down 19.9 157.8 Really Low 05:09:08 - 05:39:08 3465
Toppenish/White Swan 05:24:07 -11.6 NT Down 20.1 158.0 Low 05:09:07 - 05:39:07 3457
PNWRO 05:24:03 -12.5 AT Down 20.8 159.3 Low 05:09:03 - 05:39:03 3457
The Dalles 05:24:12 -11.9 NT Down 20.6 157.1 Low 05:09:12 - 05:39:12 3412
Maupin 05:24:12 -12.2 AT Down 21.0 157.1 Low 05:09:12 - 05:39:12 3393
Sisters 05:24:15 -12.7 AT Down 21.7 156.5 Low 05:09:15 - 05:39:15 3345
Bend 05:24:14 -13.0 AT Down 22.0 156.8 Low 05:09:14 - 05:39:14 3336
Oregon Observatory 05:24:15 -13.1 AT Down 22.1 156.6 Low 05:09:15 - 05:39:15 3326
Dunrhomin 05:23:17 -22.5 Dark Down 28.8 172.4 Low 05:08:17 - 05:38:17 3277
Nikitin 05:23:17 -22.6 Dark Down 29.0 172.4 Low 05:08:17 - 05:38:17 3267
CU-SBO 05:23:17 -22.7 Dark Down 29.0 172.3 Low 05:08:17 - 05:38:17 3263
Chiloquin 05:24:18 -13.9 AT Down 23.2 156.0 Low 05:09:18 - 05:39:18 3253
Klamath Falls 05:24:18 -14.2 AT Down 23.5 156.0 Low 05:09:18 - 05:39:18 3236
Cedarville 05:24:13 -15.5 AT Down 24.6 157.4 Low 05:09:13 - 05:39:13 3218
Fall River/Burney 05:24:19 -15.3 AT Down 24.7 156.2 Low 05:09:19 - 05:39:19 3176
Gimple 05:24:18 -16.3 AT Down 25.7 156.5 Low 05:09:18 - 05:39:18 3132
Greenville 05:24:18 -16.3 AT Down 25.7 156.4 Low 05:09:18 - 05:39:18 3132
Quincy 05:24:18 -16.4 AT Down 25.9 156.4 Low 05:09:18 - 05:39:18 3120
Portola 05:24:17 -16.7 AT Down 26.1 156.8 Low 05:09:17 - 05:39:17 3119
Reno 05:24:15 -17.3 AT Down 26.6 157.4 Low 05:09:15 - 05:39:15 3112
Carson City 05:24:15 -17.6 AT Down 26.9 157.4 Low 05:09:15 - 05:39:15 3092
Yerington 05:24:13 -18.0 Dark Down 27.3 158.0 Low 05:09:13 - 05:39:13 3088
Gardnerville 05:24:15 -17.8 AT Down 27.2 157.4 Low 05:09:15 - 05:39:15 3078
Hawthorne 05:24:11 -18.6 Dark Down 27.9 158.4 Low 05:09:11 - 05:39:11 3067
Lee Vining 05:24:14 -18.8 Dark Down 28.3 157.8 Low 05:09:14 - 05:39:14 3028
Bishop 05:24:12 -19.7 Dark Down 29.0 158.4 Low 05:09:12 - 05:39:12 3000
Beatty 05:24:05 -20.8 Dark Down 29.9 160.0 Low 05:09:05 - 05:39:05 2991
Patrick 05:23:52 -23.3 Dark Down 32.1 162.7 Up 05:08:52 - 05:38:52 2929
Laughlin/Bullhead City 05:23:52 -23.2 Dark Down 32.1 161.9 Up 05:08:52 - 05:38:52 2908
Lake Havasu City 05:23:52 -23.9 Dark Down 32.8 162.0 Up 05:08:52 - 05:38:52 2867
George/Scottsdale 05:23:48 -25.7 Dark Down 34.1 164.5 Up 05:08:48 - 05:38:48 2838
Wildwood 05:24:16 -22.2 Dark Down 32.0 157.5 Up 05:09:16 - 05:39:16 2791
Idyllwild 05:24:08 -23.4 Dark Down 32.9 159.4 Up 05:09:08 - 05:39:08 2790
Calipatria 05:24:04 -24.4 Dark Down 33.8 160.5 Up 05:09:04 - 05:39:04 2762
Yuma 05:24:01 -25.2 Dark Down 34.5 161.3 Up 05:09:01 - 05:39:01 2743

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 523790, (2024/07/02 05:23UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 15.90 164
35Eta Oph      17:10:22.7 -15:43:29  2.6  7.44 154
PPM 267109     17:38:44.8 -21:54:46  6.4  1.71 149
PPM 267057     17:36:23.2 -20:58:38  8.4  0.67 149
PPM 267006     17:33:46.3 -20:30:55  9.3  0.10 150
523790         17:34:01.6 -20:36:04 16.4       149
Positions are for J2000

Event circumstances last updated at 2024/06/11 03:47:29 UT

Marc W. Buie, Southwest Research Institute

RECON