RECON: TNO occultation with 469506

Event between (469506) 03FF128 and star GA0660:19800198 with event index number of 1922224

Geocentric closest approach at 2028/07/16 04:48:53 UTC

J2000 position of star is 17:48:32.3 -23:17:32
Equinox of date position of star is 17:50:00.5 -23:17:54
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 132 degrees from the moon. Moon is 37% illuminated.
Apparent brightness V=21.9

[RECON map]
Object is 31.0 AU from the Sun and 30.1 AU from the Earth.
Apparent velocity is 20.3 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 368 seconds.
The 1-sigma cross-track error in the shadow position is 1586 km.
The sky-plane scale is 21854.1 km/arcsec.

The object has an absolute magnitude Hv=6.9
Diameter=254.7 km assuming a 5% albedo -- 12.5 sec chord
Diameter=104.0 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 469506, (2028/07/16 04:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:09.7 -26:29:34  0.9 18.20 150
35Eta Oph      17:12:01.0 -15:45:30  2.6 11.74 139
PPM 267309     17:49:29.2 -22:29:09  6.1  0.83 132
PPM 267328     17:50:06.7 -23:14:24  8.3  0.07 132
PPM 267337     17:50:31.8 -23:16:13  9.4  0.07 132
469506         17:50:16.4 -23:17:58 16.5       131
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 2.4 sigma about the mid-time.
The median site spacing is 25.3 km RECON observability=0.3 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 04:49:16 -10.5 NT Down 14.4 174.1 Really Low 04:34:16 - 05:04:16 11723
Kamloops 04:50:04 -6.0 CT Down 13.9 160.7 Really Low 04:35:04 - 05:05:04 11581
Kelowna 04:49:57 -6.9 NT Down 14.8 161.5 Really Low 04:34:57 - 05:04:57 11564
Peachland 04:50:03 -6.9 NT Down 14.9 161.2 Really Low 04:35:03 - 05:05:03 11556
Summerland 04:50:03 -7.0 NT Down 15.0 161.3 Really Low 04:35:03 - 05:05:03 11552
Penticton 04:50:03 -7.1 NT Down 15.1 161.4 Really Low 04:35:03 - 05:05:03 11551
Oliver 04:50:03 -7.4 NT Down 15.4 161.3 Really Low 04:35:03 - 05:05:03 11538
Anarchist Mountain Observatory 04:50:03 -7.6 NT Down 15.6 161.5 Really Low 04:35:03 - 05:05:03 11535
Okanogan 04:50:04 -7.9 NT Down 16.2 161.2 Really Low 04:35:04 - 05:05:04 11508
Brewster 04:50:05 -8.0 NT Down 16.4 161.0 Really Low 04:35:05 - 05:05:05 11496
Manson/Chelan 04:50:08 -8.0 NT Down 16.5 160.7 Really Low 04:35:08 - 05:05:08 11484
Victoria 04:50:17 -6.0 NT Down 15.2 157.8 Really Low 04:35:17 - 05:05:17 11471
Wenatchee 04:50:09 -8.3 NT Down 17.0 160.5 Really Low 04:35:09 - 05:05:09 11464
Ellensburg 04:50:10 -8.5 NT Down 17.3 160.2 Really Low 04:35:10 - 05:05:10 11446
Yakima 04:50:10 -8.7 NT Down 17.7 160.2 Really Low 04:35:10 - 05:05:10 11429
PNWRO 04:50:06 -10.0 NT Down 18.6 161.7 Really Low 04:35:06 - 05:05:06 11423
Toppenish/White Swan 04:50:11 -9.0 NT Down 17.9 160.3 Really Low 04:35:11 - 05:05:11 11422
The Dalles 04:50:14 -9.1 NT Down 18.5 159.5 Really Low 04:35:14 - 05:05:14 11381
Maupin 04:50:15 -9.5 NT Down 18.9 159.5 Really Low 04:35:15 - 05:05:15 11364
Sisters 04:50:17 -9.8 NT Down 19.6 159.0 Really Low 04:35:17 - 05:05:17 11320
Bend 04:50:16 -10.1 NT Down 19.9 159.2 Really Low 04:35:16 - 05:05:16 11313
Oregon Observatory 04:50:17 -10.2 NT Down 20.0 159.1 Really Low 04:35:17 - 05:05:17 11303
Dunrhomin 04:49:18 -20.6 Dark Down 26.3 174.5 Low 04:34:18 - 05:04:18 11264
Nikitin 04:49:18 -20.8 Dark Down 26.4 174.4 Low 04:34:18 - 05:04:18 11255
CU-SBO 04:49:19 -20.8 Dark Down 26.5 174.3 Low 04:34:19 - 05:04:19 11251
Chiloquin 04:50:21 -10.9 NT Down 21.1 158.5 Low 04:35:21 - 05:05:21 11237
Klamath Falls 04:50:21 -11.1 NT Down 21.5 158.5 Low 04:35:21 - 05:05:21 11222
Cedarville 04:50:16 -12.5 AT Down 22.5 159.9 Low 04:35:16 - 05:05:16 11208
Fall River/Burney 04:50:21 -12.1 AT Down 22.7 158.7 Low 04:35:21 - 05:05:21 11168
Gimple 04:50:19 -13.1 AT Down 23.7 159.1 Low 04:35:19 - 05:05:19 11129
Greenville 04:50:20 -13.0 AT Down 23.6 159.0 Low 04:35:20 - 05:05:20 11128
Quincy 04:50:21 -13.1 AT Down 23.8 159.0 Low 04:35:21 - 05:05:21 11117
Portola 04:50:19 -13.5 AT Down 24.1 159.4 Low 04:35:19 - 05:05:19 11117
Reno 04:50:17 -14.0 AT Down 24.5 160.0 Low 04:35:17 - 05:05:17 11111
Carson City 04:50:17 -14.3 AT Down 24.8 159.9 Low 04:35:17 - 05:05:17 11092
Yerington 04:50:14 -14.8 AT Down 25.2 160.5 Low 04:35:14 - 05:05:14 11089
Gardnerville 04:50:17 -14.5 AT Down 25.1 160.0 Low 04:35:17 - 05:05:17 11080
Hawthorne 04:50:14 -15.4 AT Down 25.8 161.0 Low 04:35:14 - 05:05:14 11071
Lee Vining 04:50:16 -15.5 AT Down 26.2 160.4 Low 04:35:16 - 05:05:16 11035
Bishop 04:50:14 -16.3 AT Down 26.9 161.0 Low 04:35:14 - 05:05:14 11009
Beatty 04:50:08 -17.6 AT Down 27.8 162.5 Low 04:35:08 - 05:05:08 11001
Patrick 04:49:57 -20.2 Dark Down 29.8 165.2 Low 04:34:57 - 05:04:57 10945
Laughlin/Bullhead City 04:49:57 -20.0 Dark Down 29.9 164.4 Low 04:34:57 - 05:04:57 10923
Lake Havasu City 04:49:57 -20.7 Dark Down 30.6 164.6 Up 04:34:57 - 05:04:57 10886
George/Scottsdale 04:49:49 -22.6 Dark Down 31.9 167.0 Up 04:34:49 - 05:04:49 10861
Idyllwild 04:50:10 -19.9 Dark Down 30.8 162.1 Up 04:35:10 - 05:05:10 10816
Wildwood 04:50:17 -18.5 Dark Down 29.9 160.2 Low 04:35:17 - 05:05:17 10815
Calipatria 04:50:06 -21.0 Dark Down 31.7 163.2 Up 04:35:06 - 05:05:06 10789
Yuma 04:49:57 -21.8 Dark Down 32.3 164.0 Up 04:34:57 - 05:04:57 10772

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 469506, (2028/07/16 04:49UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 18.20 150
35Eta Oph      17:10:22.7 -15:43:29  2.6 11.74 139
PPM 267309     17:47:45.6 -22:28:40  6.1  0.83 132
PPM 267328     17:48:22.6 -23:13:58  8.3  0.07 132
PPM 267337     17:48:47.7 -23:15:47  9.4  0.07 132
469506         17:48:32.3 -23:17:32 16.5       132
Positions are for J2000

Event circumstances last updated at 2024/03/07 04:35:53 UT

Marc W. Buie, Southwest Research Institute

RECON