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 04:41:29 UTC

J2000 position of star is 09:29:02.1 +31:42:12
Equinox of date position of star is 09:30:22.2 +31:36:17
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.
TNO apparent brightness V=21.9

[RECON map]
TNO is 37.7 AU from the Sun and 36.7 AU from the Earth.
The TNO is moving 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 189 seconds.
The 1-sigma cross-track error in the shadow position is 1932 km.
The sky-plane scale is 26635.3 km/arcsec.

The TNO has an absolute magnitude Hv=6.1
Diameter=369.8 km assuming a 5% albedo -- 14.8 sec chord
Diameter=151.0 km assuming a 30% albedo -- 6.0 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 4.8 sigma about the mid-time.
The median site spacing is 29.2 km RECON observability=1.0 and success probability=11.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 04:43:25 -40.1 Dark Down 58.8 117.9 Up 04:28:25 - 04:58:25 4880
Kamloops 04:43:59 -33.0 Dark Down 50.8 100.6 Up 04:28:59 - 04:58:59 4776
Kelowna 04:43:58 -33.8 Dark Down 51.5 100.5 Up 04:28:58 - 04:58:58 4682
Peachland 04:43:59 -33.7 Dark Down 51.3 100.1 Up 04:28:59 - 04:58:59 4672
Summerland 04:43:59 -33.8 Dark Down 51.4 100.0 Up 04:28:59 - 04:58:59 4655
Penticton 04:44:00 -33.9 Dark Down 51.5 100.0 Up 04:29:00 - 04:59:00 4647
Oliver 04:43:59 -34.0 Dark Down 51.6 99.5 Up 04:28:59 - 04:58:59 4609
Anarchist Mountain Observatory 04:43:59 -34.2 Dark Down 51.7 99.5 Up 04:28:59 - 04:58:59 4589
Victoria 04:44:08 -31.9 Dark Down 49.2 95.5 Up 04:29:08 - 04:59:08 4576
Tonasket 04:44:00 -34.3 Dark Down 51.7 99.1 Up 04:29:00 - 04:59:00 4556
Okanogan 04:44:00 -34.3 Dark Down 51.7 98.5 Up 04:29:00 - 04:59:00 4521
Brewster 04:44:00 -34.3 Dark Down 51.6 98.0 Up 04:29:00 - 04:59:00 4494
Manson/Chelan 04:44:02 -34.1 Dark Down 51.4 97.4 Up 04:29:02 - 04:59:02 4474
Wenatchee 04:44:03 -34.2 Dark Down 51.3 96.7 Up 04:29:03 - 04:59:03 4424
Ellensburg 04:44:04 -34.2 Dark Down 51.2 96.0 Up 04:29:04 - 04:59:04 4382
Yakima 04:44:03 -34.3 Dark Down 51.3 95.5 Up 04:29:03 - 04:59:03 4338
Toppenish/White Swan 04:44:03 -34.5 Dark Down 51.4 95.3 Up 04:29:03 - 04:59:03 4312
PNWRO 04:44:00 -35.6 Dark Down 52.5 96.1 Up 04:29:00 - 04:59:00 4259
Goldendale 04:44:05 -34.4 Dark Down 51.1 94.3 Up 04:29:05 - 04:59:05 4256
The Dalles 04:44:06 -34.2 Dark Down 50.9 93.8 Up 04:29:06 - 04:59:06 4236
Maupin 04:44:06 -34.4 Dark Down 51.0 93.3 Up 04:29:06 - 04:59:06 4189
Sisters 04:44:08 -34.4 Dark Down 50.7 91.9 Up 04:29:08 - 04:59:08 4098
Bend 04:44:08 -34.6 Dark Down 50.9 91.8 Up 04:29:08 - 04:59:08 4069
Oregon Observatory 04:44:08 -34.6 Dark Down 50.8 91.5 Up 04:29:08 - 04:59:08 4052
North Lake 04:44:07 -35.2 Dark Down 51.2 91.1 Up 04:29:07 - 04:59:07 3976
Chiloquin 04:44:11 -34.7 Dark Down 50.5 89.6 Up 04:29:11 - 04:59:11 3912
Klamath Falls 04:44:11 -34.8 Dark Down 50.6 89.2 Up 04:29:11 - 04:59:11 3874
Lakeview 04:44:07 -35.8 Dark Down 51.6 90.1 Up 04:29:07 - 04:59:07 3855
Cedarville 04:44:07 -36.2 Dark Down 51.8 89.4 Up 04:29:07 - 04:59:07 3781
Fall River/Burney 04:44:11 -35.4 Dark Down 50.8 88.0 Up 04:29:11 - 04:59:11 3740
Susanville 04:44:09 -36.1 Dark Down 51.4 87.7 Up 04:29:09 - 04:59:09 3663
Greenville 04:44:10 -36.0 Dark Down 51.1 87.2 Up 04:29:10 - 04:59:10 3636
Gimple 04:44:10 -36.0 Dark Down 51.2 87.2 Up 04:29:10 - 04:59:10 3635
Quincy 04:44:10 -36.0 Dark Down 51.1 86.9 Up 04:29:10 - 04:59:10 3614
Portola 04:44:09 -36.4 Dark Down 51.5 87.1 Up 04:29:09 - 04:59:09 3595
Dunrhomin 04:43:25 -47.0 Dark Down 63.0 98.4 Up 04:28:25 - 04:58:25 3586
Reno 04:44:07 -36.9 Dark Down 52.0 87.1 Up 04:29:07 - 04:59:07 3559
CU-SBO 04:43:25 -47.0 Dark Down 63.0 97.8 Up 04:28:25 - 04:58:25 3558
Carson City 04:44:07 -37.1 Dark Down 52.0 86.7 Up 04:29:07 - 04:59:07 3519
Gardnerville 04:44:07 -37.2 Dark Down 52.0 86.4 Up 04:29:07 - 04:59:07 3492
Yerington 04:44:05 -37.6 Dark Down 52.4 86.8 Up 04:29:05 - 04:59:05 3491
Hawthorne 04:44:05 -38.1 Dark Down 52.8 86.5 Up 04:29:05 - 04:59:05 3435
Lee Vining 04:44:06 -37.9 Dark Down 52.4 85.5 Up 04:29:06 - 04:59:06 3377
Tonopah 04:44:01 -39.3 Dark Down 53.9 86.6 Up 04:29:01 - 04:59:01 3372
Bishop 04:44:04 -38.6 Dark Down 52.9 85.1 Up 04:29:04 - 04:59:04 3305
Beatty 04:44:00 -39.9 Dark Down 54.2 85.3 Up 04:29:00 - 04:59:00 3240
Indian Springs 04:43:57 -40.9 Dark Down 55.0 85.3 Up 04:28:57 - 04:58:57 3196
Henderson 04:43:55 -41.5 Dark Down 55.5 84.9 Up 04:28:55 - 04:58:55 3133
Patrick 04:43:51 -42.6 Dark Down 56.3 84.5 Up 04:28:51 - 04:58:51 3057
Laughlin/Bullhead City 04:43:54 -42.1 Dark Down 55.7 83.8 Up 04:28:54 - 04:58:54 3034
Kingman/Dolan Springs 04:43:53 -42.5 Dark Down 56.2 84.1 Up 04:28:53 - 04:58:53 3034
Mohave Valley 04:43:54 -42.2 Dark Down 55.7 83.4 Up 04:28:54 - 04:58:54 3004
Lake Havasu City 04:43:54 -42.5 Dark Down 55.9 83.0 Up 04:28:54 - 04:58:54 2958
Wildwood 04:44:05 -39.2 Dark Down 52.4 80.7 Up 04:29:05 - 04:59:05 2946
Parker 04:43:53 -42.6 Dark Down 55.9 82.5 Up 04:28:53 - 04:58:53 2919
Idyllwild 04:44:01 -40.8 Dark Down 53.8 81.0 Up 04:29:01 - 04:59:01 2890
George/Scottsdale 04:43:46 -44.6 Dark Down 57.8 82.8 Up 04:28:46 - 04:58:46 2861
Calipatria 04:43:57 -41.8 Dark Down 54.7 80.5 Up 04:28:57 - 04:58:57 2814
Yuma 04:43:54 -42.7 Dark Down 55.4 80.2 Up 04:28:54 - 04:58:54 2761

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 2022/05/22 23:08:09 UT

Marc W. Buie, Southwest Research Institute

RECON