RECON: TNO occultation with 469442

Event between (469442) 02GG166 and star GA0600:47908848 with event index number of 1734742

Geocentric closest approach at 2027/08/10 05:05:38 UTC

J2000 position of star is 19:43:45.0 -29:34:52
Equinox of date position of star is 19:45:16.9 -29:31:16
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 53 degrees from the moon. Moon is 60% illuminated.
Apparent brightness V=19.8

[RECON map]
Object is 14.3 AU from the Sun and 13.4 AU from the Earth.
Apparent velocity is 16.9 km/sec on the sky relative to the star, or, 6.3 arcsec/hr.
The 1-sigma error in the time of the event is 272 seconds.
The 1-sigma cross-track error in the shadow position is 884 km.
The sky-plane scale is 9684.6 km/arcsec.

The object has an absolute magnitude Hv=8.2
Diameter=136.1 km assuming a 5% albedo -- 8.1 sec chord
Diameter=55.6 km assuming a 30% albedo -- 3.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 469442, (2027/08/10 05:05UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:59:10.0 -29:28:30  1.2 41.83  93
38Zet Sgr      19:04:21.9 -29:50:17  2.7  8.93  44
PPM 270317     19:50:54.7 -28:43:07  6.0  1.43  54
PPM 270142     19:42:56.6 -29:40:26  8.5  0.57  53
PPM 270188     19:45:25.1 -29:43:32  9.6  0.21  53
469442         19:45:28.7 -29:30:48 15.8        53
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 3.3 sigma about the mid-time.
The median site spacing is 17.6 km RECON observability=0.2 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 05:05:35 -17.2 AT Up 8.1 173.9 Really Low 04:50:35 - 05:20:35 6710
Kamloops 05:06:33 -12.9 AT Up 7.6 161.5 Really Low 04:51:33 - 05:21:33 6649
Kelowna 05:06:31 -13.8 AT Up 8.5 162.2 Really Low 04:51:31 - 05:21:31 6639
Peachland 05:06:33 -13.8 AT Up 8.6 162.0 Really Low 04:51:33 - 05:21:33 6635
Summerland 05:06:32 -13.9 AT Up 8.7 162.0 Really Low 04:51:32 - 05:21:32 6633
Penticton 05:06:33 -14.0 AT Up 8.8 162.1 Really Low 04:51:33 - 05:21:33 6632
Oliver 05:06:33 -14.3 AT Up 9.2 162.1 Really Low 04:51:33 - 05:21:33 6624
Anarchist Mountain Observatory 05:06:33 -14.5 AT Up 9.4 162.3 Really Low 04:51:33 - 05:21:33 6622
Okanogan 05:06:35 -14.9 AT Up 9.9 162.1 Really Low 04:51:35 - 05:21:35 6606
Brewster 05:06:36 -15.0 AT Up 10.2 161.9 Really Low 04:51:36 - 05:21:36 6598
Manson/Chelan 05:06:37 -14.9 AT Up 10.3 161.6 Really Low 04:51:37 - 05:21:37 6590
Victoria 05:06:49 -13.0 AT Up 9.0 158.9 Really Low 04:51:49 - 05:21:49 6579
Wenatchee 05:06:39 -15.2 AT Up 10.7 161.4 Really Low 04:51:39 - 05:21:39 6577
Ellensburg 05:06:41 -15.4 AT Up 11.0 161.2 Really Low 04:51:41 - 05:21:41 6565
Yakima 05:06:42 -15.7 AT Up 11.4 161.1 Really Low 04:51:42 - 05:21:42 6555
PNWRO 05:06:36 -16.9 AT Up 12.3 162.5 Really Low 04:51:36 - 05:21:36 6550
Toppenish/White Swan 05:06:42 -15.9 AT Up 11.7 161.3 Really Low 04:51:42 - 05:21:42 6550
The Dalles 05:06:47 -16.1 AT Up 12.2 160.6 Really Low 04:51:47 - 05:21:47 6522
Maupin 05:06:47 -16.4 AT Up 12.6 160.6 Really Low 04:51:47 - 05:21:47 6511
Sisters 05:06:51 -16.8 AT Up 13.4 160.1 Really Low 04:51:51 - 05:21:51 6481
Bend 05:06:50 -17.1 AT Up 13.6 160.3 Really Low 04:51:50 - 05:21:50 6476
Oregon Observatory 05:06:51 -17.1 AT Up 13.8 160.2 Really Low 04:51:51 - 05:21:51 6469
Chiloquin 05:06:55 -17.8 AT Up 14.9 159.8 Really Low 04:51:55 - 05:21:55 6422
Klamath Falls 05:06:56 -18.1 Dark Up 15.3 159.8 Really Low 04:51:56 - 05:21:56 6411
Cedarville 05:06:49 -19.4 Dark Up 16.3 161.1 Really Low 04:51:49 - 05:21:49 6400
Dunrhomin 05:05:41 -27.5 Dark Up 19.9 174.2 Really Low 04:50:41 - 05:20:41 6392
Nikitin 05:05:40 -27.6 Dark Up 20.1 174.2 Low 04:50:40 - 05:20:40 6386
CU-SBO 05:05:41 -27.7 Dark Up 20.2 174.1 Low 04:50:41 - 05:20:41 6383
Fall River/Burney 05:06:56 -19.1 Dark Up 16.5 160.0 Really Low 04:51:56 - 05:21:56 6372
Gimple 05:06:55 -20.0 Dark Up 17.5 160.4 Really Low 04:51:55 - 05:21:55 6342
Greenville 05:06:56 -20.0 Dark Up 17.4 160.3 Really Low 04:51:56 - 05:21:56 6341
Quincy 05:06:56 -20.1 Dark Up 17.6 160.3 Really Low 04:51:56 - 05:21:56 6334
Portola 05:06:54 -20.5 Dark Up 17.9 160.7 Really Low 04:51:54 - 05:21:54 6333
Reno 05:06:52 -21.0 Dark Up 18.3 161.2 Really Low 04:51:52 - 05:21:52 6328
Carson City 05:06:51 -21.3 Dark Up 18.6 161.2 Really Low 04:51:51 - 05:21:51 6314
Yerington 05:06:49 -21.8 Dark Up 19.0 161.7 Really Low 04:51:49 - 05:21:49 6311
Gardnerville 05:06:52 -21.5 Dark Up 18.9 161.2 Really Low 04:51:52 - 05:21:52 6304
Hawthorne 05:06:47 -22.4 Dark Up 19.5 162.1 Really Low 04:51:47 - 05:21:47 6295
Lee Vining 05:06:51 -22.5 Dark Up 19.9 161.7 Really Low 04:51:51 - 05:21:51 6269
Bishop 05:06:48 -23.3 Dark Up 20.7 162.2 Low 04:51:48 - 05:21:48 6248
Beatty 05:06:41 -24.5 Dark Up 21.5 163.6 Low 04:51:41 - 05:21:41 6238
Patrick 05:06:28 -27.2 Dark Up 23.5 166.0 Low 04:51:28 - 05:21:28 6184
Laughlin/Bullhead City 05:06:32 -27.0 Dark Up 23.6 165.4 Low 04:51:32 - 05:21:32 6169
Lake Havasu City 05:06:32 -27.6 Dark Up 24.3 165.5 Low 04:51:32 - 05:21:32 6139
George/Scottsdale 05:06:20 -29.6 Dark Up 25.6 167.7 Low 04:51:20 - 05:21:20 6109
Wildwood 05:06:54 -25.5 Dark Up 23.8 161.6 Low 04:51:54 - 05:21:54 6095
Idyllwild 05:06:45 -26.8 Dark Up 24.6 163.3 Low 04:51:45 - 05:21:45 6091
Calipatria 05:06:40 -27.9 Dark Up 25.4 164.3 Low 04:51:40 - 05:21:40 6065
Yuma 05:06:36 -28.8 Dark Up 26.0 165.1 Low 04:51:36 - 05:21:36 6048

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 469442, (2027/08/10 05:05UT)
Object            RA         Dec     mag  sep  mel
Fomalhaut      22:57:39.6 -29:37:24  1.2 41.83  93
38Zet Sgr      19:02:36.7 -29:52:49  2.7  8.93  44
PPM 270317     19:49:11.8 -28:47:22  6.0  1.43  54
PPM 270142     19:41:12.7 -29:44:25  8.5  0.57  53
PPM 270188     19:43:41.3 -29:47:36  9.6  0.21  53
469442         19:43:45.0 -29:34:52 15.8        53
Positions are for J2000

Event circumstances last updated at 2024/06/22 21:28:02 UT

Marc W. Buie, Southwest Research Institute

RECON