RECON: TNO occultation with 523686

Event between (523686) 14DB143 and star GA0880:14077957 with event index number of 2622997

Geocentric closest approach at 2026/03/21 10:29:54 UTC

J2000 position of star is 19:10:38.3 -01:38:41
Equinox of date position of star is 19:11:54.5 -01:36:11
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 101 degrees from the moon. Moon is 8% illuminated.
Apparent brightness V=22.5

[RECON map]
Object is 20.4 AU from the Sun and 20.6 AU from the Earth.
Apparent velocity is 19.4 km/sec on the sky relative to the star, or, 4.7 arcsec/hr.
The 1-sigma error in the time of the event is 159 seconds.
The 1-sigma cross-track error in the shadow position is 2814 km.
The sky-plane scale is 14968.0 km/arcsec.

The object has an absolute magnitude Hv=9.1
Diameter=91.2 km assuming a 5% albedo -- 4.6 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 523686, (2026/03/21 10:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:01.2 -26:29:16  0.9 45.94 143
Tarazed        19:47:30.3 +10:40:44  2.7 15.13  89
PPM 180573     19:11:12.5 -00:23:02  6.5  1.23 101
PPM 180567     19:10:14.2 -02:14:37  8.1  0.78 102
PPM 180569     19:10:37.4 -01:40:04  9.6  0.35 101
PPM 180587     19:13:04.1 -01:23:12 10.4  0.34 101
523686         19:11:59.9 -01:36:00 16.7       101
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 3.4 km RECON observability=0.1 and success probability=0.1%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Victoria 10:29:50 -33.8 Dark Down 8.8 102.7 Really Low 10:16:06 - 10:43:34 4795
Kamloops 10:30:03 -30.8 Dark Down 10.3 105.5 Really Low 10:16:19 - 10:43:47 4765
Peachland 10:29:59 -31.3 Dark Down 10.9 105.8 Really Low 10:16:15 - 10:43:43 4756
Summerland 10:29:59 -31.3 Dark Down 11.0 105.8 Really Low 10:16:15 - 10:43:43 4754
Manson/Chelan 10:29:49 -32.8 Dark Down 11.1 105.1 Really Low 10:16:05 - 10:43:33 4752
Penticton 10:29:58 -31.3 Dark Down 11.1 105.9 Really Low 10:16:14 - 10:43:42 4752
Kelowna 10:30:01 -31.0 Dark Down 11.0 106.1 Really Low 10:16:17 - 10:43:45 4752
Ellensburg 10:29:44 -33.6 Dark Down 11.1 104.6 Really Low 10:16:00 - 10:43:28 4751
Wenatchee 10:29:45 -33.2 Dark Down 11.1 104.9 Really Low 10:16:01 - 10:43:29 4751
Oliver 10:29:56 -31.6 Dark Down 11.2 105.8 Really Low 10:16:12 - 10:43:40 4751
Brewster 10:29:51 -32.5 Dark Down 11.3 105.4 Really Low 10:16:07 - 10:43:35 4748
Anarchist Mountain Observatory 10:29:57 -31.6 Dark Down 11.3 106.0 Really Low 10:16:13 - 10:43:41 4748
Yakima 10:29:40 -33.9 Dark Down 11.1 104.5 Really Low 10:15:56 - 10:43:24 4748
Okanogan 10:29:53 -32.2 Dark Down 11.3 105.7 Really Low 10:16:09 - 10:43:37 4747
The Dalles 10:29:35 -35.0 Dark Down 10.9 103.8 Really Low 10:15:51 - 10:43:19 4746
Toppenish/White Swan 10:29:41 -34.0 Dark Down 11.3 104.6 Really Low 10:15:57 - 10:43:25 4743
Maupin 10:29:33 -35.2 Dark Down 11.1 103.8 Really Low 10:15:49 - 10:43:17 4740
Sisters 10:29:27 -36.1 Dark Down 11.0 103.3 Really Low 10:15:43 - 10:43:11 4737
Bend 10:29:27 -36.2 Dark Down 11.2 103.4 Really Low 10:15:43 - 10:43:11 4730
Oregon Observatory 10:29:24 -36.4 Dark Down 11.1 103.3 Really Low 10:15:40 - 10:43:08 4730
PNWRO 10:29:39 -33.5 Dark Down 12.4 105.7 Really Low 10:15:55 - 10:43:23 4719
Chiloquin 10:29:18 -37.5 Dark Down 11.1 102.7 Really Low 10:15:34 - 10:43:02 4716
Klamath Falls 10:29:16 -37.7 Dark Down 11.2 102.7 Really Low 10:15:32 - 10:43:00 4709
Fall River/Burney 10:29:10 -38.4 Dark Down 11.8 102.7 Really Low 10:15:26 - 10:42:54 4683
Cedarville 10:29:14 -37.4 Dark Down 12.6 103.7 Really Low 10:15:30 - 10:42:58 4675
Greenville 10:29:04 -38.8 Dark Down 12.3 102.8 Really Low 10:15:20 - 10:42:48 4658
Gimple 10:29:06 -38.7 Dark Down 12.4 102.9 Really Low 10:15:22 - 10:42:50 4657
Quincy 10:29:03 -38.9 Dark Down 12.3 102.8 Really Low 10:15:19 - 10:42:47 4654
Portola 10:29:03 -38.7 Dark Down 12.7 103.1 Really Low 10:15:19 - 10:42:47 4645
Reno 10:29:04 -38.5 Dark Down 13.3 103.5 Really Low 10:15:20 - 10:42:48 4629
Carson City 10:29:01 -38.8 Dark Down 13.4 103.4 Really Low 10:15:17 - 10:42:45 4621
Gardnerville 10:29:00 -38.9 Dark Down 13.4 103.4 Really Low 10:15:16 - 10:42:44 4614
Yerington 10:29:00 -38.5 Dark Down 13.9 103.8 Really Low 10:15:16 - 10:42:44 4606
Hawthorne 10:28:57 -38.5 Dark Down 14.4 104.0 Really Low 10:15:13 - 10:42:41 4586
Lee Vining 10:28:56 -39.2 Dark Down 14.1 103.5 Really Low 10:15:12 - 10:42:40 4581
Bishop 10:28:53 -39.1 Dark Down 14.8 103.9 Really Low 10:15:09 - 10:42:37 4552
Sleaford 10:30:30 -23.0 Dark Down 18.2 118.1 Really Low 10:16:46 - 10:44:14 4512
Beatty 10:28:53 -38.4 Dark Down 16.2 104.8 Really Low 10:15:09 - 10:42:37 4510
Wildwood 10:28:35 -41.3 Dark Down 15.4 102.8 Really Low 10:14:51 - 10:42:19 4459
Laughlin/Bullhead City 10:28:47 -38.0 Dark Down 18.3 105.7 Really Low 10:15:03 - 10:42:31 4413
Idyllwild 10:28:35 -40.3 Dark Down 17.0 103.9 Really Low 10:14:51 - 10:42:19 4413
Patrick 10:28:49 -37.3 Dark Down 18.8 106.3 Really Low 10:15:05 - 10:42:33 4406
Lake Havasu City 10:28:44 -38.2 Dark Down 18.7 105.6 Really Low 10:15:00 - 10:42:28 4386
Calipatria 10:28:35 -39.8 Dark Down 18.1 104.4 Really Low 10:14:51 - 10:42:19 4366
Yuma 10:28:34 -39.4 Dark Down 18.9 104.8 Really Low 10:14:50 - 10:42:18 4332
Dunrhomin 10:29:30 -28.9 Dark Down 23.7 114.4 Low 10:15:46 - 10:43:14 4320
CU-SBO 10:29:28 -29.0 Dark Down 23.8 114.2 Low 10:15:44 - 10:43:12 4317
Nikitin 10:29:29 -29.0 Dark Down 23.8 114.3 Low 10:15:45 - 10:43:13 4316
George/Scottsdale 10:28:44 -36.9 Dark Down 20.9 107.0 Low 10:15:00 - 10:42:28 4303

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 523686, (2026/03/21 10:30UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 45.94 143
Tarazed        19:46:15.6 +10:36:48  2.7 15.13  89
PPM 180573     19:09:51.6 -00:25:41  6.5  1.23 101
PPM 180567     19:08:52.3 -02:17:14  8.1  0.78 102
PPM 180569     19:09:15.8 -01:42:42  9.6  0.35 101
PPM 180587     19:11:42.6 -01:25:55 10.4  0.34 101
523686         19:10:38.3 -01:38:41 16.7       101
Positions are for J2000

Event circumstances last updated at 2024/06/18 21:25:56 UT

Marc W. Buie, Southwest Research Institute

RECON