RECON: TNO occultation with 15788

Event between (15788) 93SB and star GA1140:01028178 with event index number of 1387747

Geocentric closest approach at 2025/03/27 04:34:18 UTC

J2000 position of star is 05:10:53.7 +24:52:42
Equinox of date position of star is 05:12:18.3 +24:54:18
Stellar brightness G=14.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 104 degrees from the moon. Moon is 7% illuminated.
Apparent brightness V=22.4

[RECON map]
Object is 26.8 AU from the Sun and 27.1 AU from the Earth.
Apparent velocity is 15.2 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 303 seconds.
The 1-sigma cross-track error in the shadow position is 1333 km.
The sky-plane scale is 19642.1 km/arcsec.

The object has an absolute magnitude Hv=7.9
Diameter=154.9 km assuming a 5% albedo -- 10.2 sec chord
Diameter=63.2 km assuming a 30% albedo -- 4.2 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 15788, (2025/03/27 04:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:22.3 +16:33:29  0.8 11.69  94
Alnath         05:27:53.4 +28:37:35  1.6  5.07 107
103 Tau        05:09:39.1 +24:17:46  5.3  0.88 103
PPM 094178     05:14:36.0 +24:25:30  8.4  0.69 104
PPM 094145     05:12:22.7 +24:53:57 10.0  0.02 103
15788          05:12:26.6 +24:54:28 14.5       104
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 3.0 sigma about the mid-time.
The median site spacing is 21.2 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)
Sleaford 04:38:23 -26.7 Dark Down 31.0 271.6 Up 04:23:23 - 04:53:23 9383
Kamloops 04:38:00 -20.6 Dark Down 40.1 260.7 Up 04:23:00 - 04:53:00 8899
Kelowna 04:38:05 -21.5 Dark Down 39.7 262.2 Up 04:23:05 - 04:53:05 8851
Peachland 04:38:06 -21.4 Dark Down 39.9 262.0 Up 04:23:06 - 04:53:06 8834
Summerland 04:38:06 -21.6 Dark Down 39.8 262.2 Up 04:23:06 - 04:53:06 8824
Penticton 04:38:08 -21.7 Dark Down 39.8 262.4 Up 04:23:08 - 04:53:08 8821
Oliver 04:38:08 -21.9 Dark Down 39.8 262.7 Up 04:23:08 - 04:53:08 8791
Anarchist Mountain Observatory 04:38:10 -22.1 Dark Down 39.7 263.0 Up 04:23:10 - 04:53:10 8781
Okanogan 04:38:13 -22.3 Dark Down 39.9 263.4 Up 04:23:13 - 04:53:13 8719
Brewster 04:38:13 -22.3 Dark Down 40.1 263.4 Up 04:23:13 - 04:53:13 8690
Manson/Chelan 04:38:12 -22.2 Dark Down 40.4 263.3 Up 04:23:12 - 04:53:12 8663
Victoria 04:38:01 -20.0 Dark Down 42.4 260.0 Up 04:23:01 - 04:53:01 8637
Wenatchee 04:38:15 -22.4 Dark Down 40.5 263.6 Up 04:23:15 - 04:53:15 8616
Ellensburg 04:38:16 -22.5 Dark Down 40.7 263.8 Up 04:23:16 - 04:53:16 8574
Yakima 04:38:17 -22.7 Dark Down 40.8 264.1 Up 04:23:17 - 04:53:17 8537
PNWRO 04:38:24 -24.0 Dark Down 39.6 265.9 Up 04:23:24 - 04:53:24 8529
Toppenish/White Swan 04:38:19 -22.9 Dark Down 40.7 264.4 Up 04:23:19 - 04:53:19 8522
Dunrhomin 04:39:21 -35.5 Dark Down 29.2 279.1 Low 04:24:21 - 04:54:21 8441
The Dalles 04:38:20 -22.8 Dark Down 41.3 264.5 Up 04:23:20 - 04:53:20 8431
Nikitin 04:39:23 -35.7 Dark Down 29.2 279.2 Low 04:24:23 - 04:54:23 8424
CU-SBO 04:39:22 -35.7 Dark Down 29.2 279.2 Low 04:24:22 - 04:54:22 8416
Maupin 04:38:22 -23.1 Dark Down 41.2 264.9 Up 04:23:22 - 04:53:22 8396
Sisters 04:38:24 -23.2 Dark Down 41.7 265.3 Up 04:23:24 - 04:53:24 8303
Bend 04:38:26 -23.5 Dark Down 41.5 265.7 Up 04:23:26 - 04:53:26 8288
Oregon Observatory 04:38:26 -23.5 Dark Down 41.6 265.8 Up 04:23:26 - 04:53:26 8269
Chiloquin 04:38:30 -23.9 Dark Down 42.0 266.7 Up 04:23:30 - 04:53:30 8135
Klamath Falls 04:38:32 -24.1 Dark Down 41.9 267.1 Up 04:23:32 - 04:53:32 8105
Cedarville 04:38:39 -25.5 Dark Down 40.7 268.8 Up 04:23:39 - 04:53:39 8086
Fall River/Burney 04:38:38 -24.9 Dark Down 41.7 268.4 Up 04:23:38 - 04:53:38 8005
Gimple 04:38:42 -25.7 Dark Down 41.3 269.6 Up 04:23:42 - 04:53:42 7935
Greenville 04:38:43 -25.7 Dark Down 41.3 269.5 Up 04:23:43 - 04:53:43 7932
Portola 04:38:45 -26.2 Dark Down 40.9 270.1 Up 04:23:45 - 04:53:45 7915
Quincy 04:38:43 -25.8 Dark Down 41.3 269.7 Up 04:23:43 - 04:53:43 7913
Reno 04:38:49 -26.8 Dark Down 40.4 270.8 Up 04:23:49 - 04:53:49 7909
Yerington 04:38:53 -27.5 Dark Down 39.9 271.6 Up 04:23:53 - 04:53:53 7876
Carson City 04:38:50 -26.9 Dark Down 40.4 271.1 Up 04:23:50 - 04:53:50 7876
Gardnerville 04:38:51 -27.1 Dark Down 40.4 271.3 Up 04:23:51 - 04:53:51 7854
Hawthorne 04:38:56 -28.1 Dark Down 39.5 272.4 Up 04:23:56 - 04:53:56 7848
Lee Vining 04:38:56 -28.0 Dark Down 39.8 272.5 Up 04:23:56 - 04:53:56 7780
Beatty 04:39:07 -30.2 Dark Down 37.8 274.8 Up 04:24:07 - 04:54:07 7752
Bishop 04:39:01 -28.8 Dark Down 39.2 273.5 Up 04:24:01 - 04:54:01 7745
Patrick 04:39:22 -33.0 Dark Down 35.3 277.4 Up 04:24:22 - 04:54:22 7705
Laughlin/Bullhead City 04:39:19 -32.6 Dark Down 35.9 277.2 Up 04:24:19 - 04:54:19 7658
George/Scottsdale 04:39:33 -35.4 Dark Down 33.4 279.6 Up 04:24:33 - 04:54:33 7612
Lake Havasu City 04:39:23 -33.2 Dark Down 35.6 277.8 Up 04:24:23 - 04:54:23 7602
Idyllwild 04:39:18 -31.8 Dark Down 37.4 277.2 Up 04:24:18 - 04:54:18 7449
Calipatria 04:39:24 -33.0 Dark Down 36.4 278.2 Up 04:24:24 - 04:54:24 7429
Wildwood 04:39:12 -30.3 Dark Down 39.1 276.0 Up 04:24:12 - 04:54:12 7422
Yuma 04:39:29 -33.9 Dark Down 35.5 279.0 Up 04:24:29 - 04:54:29 7417

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 15788, (2025/03/27 04:40UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 11.69  94
Alnath         05:26:17.6 +28:36:23  1.6  5.07 107
103 Tau        05:08:06.6 +24:15:54  5.3  0.88 103
PPM 094178     05:13:03.4 +24:23:49  8.4  0.69 104
PPM 094145     05:10:49.8 +24:52:11 10.0  0.02 103
15788          05:10:53.7 +24:52:42 14.5       103
Positions are for J2000

Event circumstances last updated at 2022/12/24 04:12:42 UT

Marc W. Buie, Southwest Research Institute

RECON