RECON: TNO occultation with 523776

Event between (523776) 14YB50 and star GA1200:03287234 with event index number of 2354102

Geocentric closest approach at 2028/02/15 04:42:14 UTC

J2000 position of star is 09:29:02.1 +31:42:12
Equinox of date position of star is 09:30:25.8 +31:36:01
Stellar brightness G=15.0, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 77 degrees from the moon. Moon is 73% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 37.7 AU from the Sun and 36.7 AU from the Earth.
Apparent velocity is 25.0 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 123 seconds.
The 1-sigma cross-track error in the shadow position is 1592 km.
The sky-plane scale is 26635.2 km/arcsec.

The object has an absolute magnitude Hv=6.0
Diameter=369.8 km assuming a 5% albedo -- 15.0 sec chord
Diameter=151.0 km assuming a 30% albedo -- 6.1 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523776, (2028/02/15 04:42UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:52.1 +11:49:43  1.3 21.72  60
40Alp Lyn      09:22:45.7 +34:16:19  3.1  3.17  80
PPM 074550     09:31:43.1 +31:54:59  8.4  0.40  77
PPM 074526     09:29:34.9 +31:20:28  9.3  0.34  77
523776         09:30:42.7 +31:34:45 15.0        77
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 38.5 km RECON observability=1.0 and success probability=2.2%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 04:44:09 -40.2 Dark Down 58.9 118.1 Up 04:33:25 - 04:54:53 4604
Kamloops 04:44:44 -33.1 Dark Down 50.9 100.8 Up 04:34:00 - 04:55:28 4498
Kelowna 04:44:43 -34.0 Dark Down 51.6 100.6 Up 04:33:59 - 04:55:27 4403
Peachland 04:44:44 -33.8 Dark Down 51.5 100.2 Up 04:34:00 - 04:55:28 4394
Summerland 04:44:43 -33.9 Dark Down 51.5 100.1 Up 04:33:59 - 04:55:27 4377
Penticton 04:44:44 -34.0 Dark Down 51.6 100.1 Up 04:34:00 - 04:55:28 4369
Oliver 04:44:43 -34.2 Dark Down 51.7 99.7 Up 04:33:59 - 04:55:27 4331
Anarchist Mountain Observatory 04:44:43 -34.3 Dark Down 51.8 99.7 Up 04:33:59 - 04:55:27 4311
Victoria 04:44:52 -32.0 Dark Down 49.3 95.6 Up 04:34:08 - 04:55:36 4297
Okanogan 04:44:45 -34.4 Dark Down 51.8 98.7 Up 04:34:01 - 04:55:29 4243
Brewster 04:44:45 -34.4 Dark Down 51.7 98.1 Up 04:34:01 - 04:55:29 4215
Manson/Chelan 04:44:45 -34.3 Dark Down 51.5 97.6 Up 04:34:01 - 04:55:29 4196
Wenatchee 04:44:47 -34.3 Dark Down 51.5 96.8 Up 04:34:03 - 04:55:31 4146
Ellensburg 04:44:48 -34.3 Dark Down 51.4 96.1 Up 04:34:04 - 04:55:32 4103
Yakima 04:44:48 -34.5 Dark Down 51.4 95.6 Up 04:34:04 - 04:55:32 4059
Toppenish/White Swan 04:44:48 -34.6 Dark Down 51.5 95.5 Up 04:34:04 - 04:55:32 4034
PNWRO 04:44:44 -35.7 Dark Down 52.6 96.2 Up 04:34:00 - 04:55:28 3981
The Dalles 04:44:51 -34.4 Dark Down 51.0 93.9 Up 04:34:07 - 04:55:35 3957
Maupin 04:44:50 -34.6 Dark Down 51.1 93.5 Up 04:34:06 - 04:55:34 3910
Sisters 04:44:52 -34.5 Dark Down 50.8 92.0 Up 04:34:08 - 04:55:36 3819
Bend 04:44:52 -34.8 Dark Down 51.0 91.9 Up 04:34:08 - 04:55:36 3791
Oregon Observatory 04:44:52 -34.7 Dark Down 50.9 91.6 Up 04:34:08 - 04:55:36 3773
Chiloquin 04:44:55 -34.8 Dark Down 50.7 89.7 Up 04:34:11 - 04:55:39 3634
Klamath Falls 04:44:54 -35.0 Dark Down 50.7 89.4 Up 04:34:10 - 04:55:38 3595
Cedarville 04:44:52 -36.3 Dark Down 51.9 89.5 Up 04:34:08 - 04:55:36 3502
Fall River/Burney 04:44:54 -35.5 Dark Down 51.0 88.1 Up 04:34:10 - 04:55:38 3462
Greenville 04:44:53 -36.1 Dark Down 51.3 87.3 Up 04:34:09 - 04:55:37 3357
Gimple 04:44:54 -36.2 Dark Down 51.3 87.3 Up 04:34:10 - 04:55:38 3356
Quincy 04:44:54 -36.2 Dark Down 51.3 87.0 Up 04:34:10 - 04:55:38 3335
Portola 04:44:53 -36.5 Dark Down 51.6 87.2 Up 04:34:09 - 04:55:37 3316
Dunrhomin 04:44:09 -47.1 Dark Down 63.2 98.5 Up 04:33:25 - 04:54:53 3310
Nikitin 04:44:09 -47.2 Dark Down 63.2 98.1 Up 04:33:25 - 04:54:53 3290
CU-SBO 04:44:10 -47.2 Dark Down 63.1 98.0 Up 04:33:26 - 04:54:54 3282
Reno 04:44:52 -37.1 Dark Down 52.1 87.2 Up 04:34:08 - 04:55:36 3280
Carson City 04:44:51 -37.2 Dark Down 52.1 86.8 Up 04:34:07 - 04:55:35 3240
Yerington 04:44:49 -37.7 Dark Down 52.6 86.9 Up 04:34:05 - 04:55:33 3213
Gardnerville 04:44:51 -37.3 Dark Down 52.1 86.5 Up 04:34:07 - 04:55:35 3213
Hawthorne 04:44:48 -38.2 Dark Down 53.0 86.6 Up 04:34:04 - 04:55:32 3157
Lee Vining 04:44:50 -38.0 Dark Down 52.6 85.6 Up 04:34:06 - 04:55:34 3099
Bishop 04:44:48 -38.7 Dark Down 53.1 85.1 Up 04:34:04 - 04:55:32 3026
Beatty 04:44:45 -40.1 Dark Down 54.3 85.4 Up 04:34:01 - 04:55:29 2962
Patrick 04:44:36 -42.7 Dark Down 56.5 84.6 Up 04:33:52 - 04:55:20 2780
Laughlin/Bullhead City 04:44:38 -42.2 Dark Down 55.9 83.9 Up 04:33:54 - 04:55:22 2756
Lake Havasu City 04:44:37 -42.6 Dark Down 56.0 83.0 Up 04:33:53 - 04:55:21 2680
Wildwood 04:44:50 -39.3 Dark Down 52.5 80.8 Up 04:34:06 - 04:55:34 2667
Idyllwild 04:44:44 -40.9 Dark Down 54.0 81.0 Up 04:34:00 - 04:55:28 2612
George/Scottsdale 04:44:30 -44.8 Dark Down 57.9 82.8 Up 04:33:46 - 04:55:14 2584
Calipatria 04:44:41 -42.0 Dark Down 54.9 80.6 Up 04:33:57 - 04:55:25 2536
Yuma 04:44:38 -42.8 Dark Down 55.5 80.3 Up 04:33:54 - 04:55:22 2483

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 523776, (2028/02/15 04:42UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 21.72  60
40Alp Lyn      09:21:02.9 +34:23:34  3.1  3.17  80
PPM 074550     09:30:02.4 +32:02:28  8.4  0.40  77
PPM 074526     09:27:54.3 +31:27:54  9.3  0.34  77
523776         09:29:02.1 +31:42:12 15.0        77
Positions are for J2000

Event circumstances last updated at 2023/05/23 02:45:51 UT

Marc W. Buie, Southwest Research Institute

RECON