RECON: TNO occultation with 470308

Event between (470308) 07JH43 and star GA0620:14103291 with event index number of 2220367

Geocentric closest approach at 2026/07/03 06:31:10 UTC

J2000 position of star is 17:10:00.2 -27:53:25
Equinox of date position of star is 17:11:32.4 -27:55:09
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 59 degrees from the moon. Moon is 90% illuminated.
Apparent brightness V=20.9

[RECON map]
Object is 40.5 AU from the Sun and 39.6 AU from the Earth.
Apparent velocity is 22.8 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 120 seconds.
The 1-sigma cross-track error in the shadow position is 1737 km.
The sky-plane scale is 28699.9 km/arcsec.

The object has an absolute magnitude Hv=4.8
Diameter=758.6 km assuming a 5% albedo -- 28.8 sec chord
Diameter=309.7 km assuming a 30% albedo -- 11.7 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 470308, (2026/07/03 06:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.2 -26:29:18  0.9  9.14  68
23Tau Sco      16:37:32.2 -28:16:07  2.8  7.53  66
PPM 266416     17:08:32.0 -26:32:47  6.3  1.54  60
PPM 266467     17:10:43.6 -27:55:37  8.3  0.21  59
PPM 266500     17:11:47.0 -27:53:16  9.5  0.04  59
470308         17:11:40.1 -27:55:18 16.8        58
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 13.8 km RECON observability=0.5 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 06:30:43 -14.5 AT Up 8.9 193.9 Really Low 06:20:14 - 06:41:12 8184
Kamloops 06:31:24 -13.5 AT Up 11.4 181.2 Really Low 06:20:55 - 06:41:53 8157
Kelowna 06:31:22 -14.5 AT Up 12.2 182.0 Really Low 06:20:53 - 06:41:51 8142
Peachland 06:31:22 -14.5 AT Up 12.3 181.7 Really Low 06:20:53 - 06:41:51 8138
Summerland 06:31:23 -14.6 AT Up 12.5 181.8 Really Low 06:20:54 - 06:41:52 8135
Penticton 06:31:21 -14.7 AT Up 12.6 181.9 Really Low 06:20:52 - 06:41:50 8134
Oliver 06:31:22 -15.1 AT Up 12.9 181.9 Really Low 06:20:53 - 06:41:51 8125
Anarchist Mountain Observatory 06:31:21 -15.3 AT Up 13.1 182.1 Really Low 06:20:52 - 06:41:50 8122
Okanogan 06:31:21 -15.8 AT Up 13.7 181.9 Really Low 06:20:52 - 06:41:50 8104
Brewster 06:31:23 -16.0 AT Up 14.0 181.7 Really Low 06:20:54 - 06:41:52 8096
Victoria 06:31:34 -14.7 AT Up 13.6 178.4 Really Low 06:21:05 - 06:42:03 8090
Manson/Chelan 06:31:23 -16.1 AT Up 14.2 181.4 Really Low 06:20:54 - 06:41:52 8089
Wenatchee 06:31:24 -16.5 AT Up 14.7 181.2 Really Low 06:20:55 - 06:41:53 8076
Ellensburg 06:31:25 -16.8 AT Up 15.1 181.0 Really Low 06:20:56 - 06:41:54 8063
Yakima 06:31:25 -17.2 AT Up 15.5 181.0 Really Low 06:20:56 - 06:41:54 8051
Toppenish/White Swan 06:31:24 -17.5 AT Up 15.7 181.2 Really Low 06:20:55 - 06:41:53 8045
PNWRO 06:31:19 -18.2 Dark Up 16.1 182.5 Really Low 06:20:50 - 06:41:48 8040
The Dalles 06:31:26 -18.0 AT Up 16.5 180.4 Really Low 06:20:57 - 06:41:55 8018
Maupin 06:31:25 -18.4 Dark Up 16.9 180.5 Really Low 06:20:56 - 06:41:54 8005
Sisters 06:31:28 -19.0 Dark Up 17.8 180.1 Really Low 06:20:59 - 06:41:57 7974
Bend 06:31:26 -19.3 Dark Up 18.1 180.3 Really Low 06:20:57 - 06:41:55 7967
Oregon Observatory 06:31:27 -19.4 Dark Up 18.2 180.2 Really Low 06:20:58 - 06:41:56 7961
Chiloquin 06:31:29 -20.5 Dark Up 19.5 179.8 Really Low 06:21:00 - 06:41:58 7911
Klamath Falls 06:31:29 -20.9 Dark Up 19.9 179.9 Really Low 06:21:00 - 06:41:58 7899
Cedarville 06:31:22 -22.0 Dark Up 20.6 181.4 Low 06:20:53 - 06:41:51 7881
Fall River/Burney 06:31:27 -22.0 Dark Up 21.1 180.3 Low 06:20:58 - 06:41:56 7855
Dunrhomin 06:30:28 -26.3 Dark Up 20.2 195.3 Low 06:19:59 - 06:40:57 7823
Gimple 06:31:25 -23.0 Dark Up 22.0 180.8 Low 06:20:56 - 06:41:54 7821
Greenville 06:31:26 -23.0 Dark Up 22.0 180.7 Low 06:20:57 - 06:41:55 7821
Nikitin 06:30:28 -26.5 Dark Up 20.4 195.3 Low 06:19:59 - 06:40:57 7815
CU-SBO 06:30:28 -26.5 Dark Up 20.5 195.2 Low 06:19:59 - 06:40:57 7813
Quincy 06:31:25 -23.2 Dark Up 22.2 180.7 Low 06:20:56 - 06:41:54 7812
Portola 06:31:23 -23.5 Dark Up 22.3 181.1 Low 06:20:54 - 06:41:52 7810
Reno 06:31:21 -23.9 Dark Up 22.5 181.7 Low 06:20:52 - 06:41:50 7802
Carson City 06:31:20 -24.2 Dark Up 22.9 181.8 Low 06:20:51 - 06:41:49 7786
Yerington 06:31:18 -24.6 Dark Up 23.1 182.4 Low 06:20:49 - 06:41:47 7781
Gardnerville 06:31:21 -24.5 Dark Up 23.1 181.8 Low 06:20:52 - 06:41:50 7776
Hawthorne 06:31:17 -25.2 Dark Up 23.5 182.9 Low 06:20:48 - 06:41:46 7762
Lee Vining 06:31:18 -25.6 Dark Up 24.1 182.4 Low 06:20:49 - 06:41:47 7736
Bishop 06:31:15 -26.3 Dark Up 24.7 183.1 Low 06:20:46 - 06:41:44 7711
Beatty 06:31:09 -27.2 Dark Up 25.0 184.7 Low 06:20:40 - 06:41:38 7694
Patrick 06:30:57 -29.4 Dark Up 26.3 187.6 Low 06:20:28 - 06:41:26 7626
Laughlin/Bullhead City 06:31:00 -29.5 Dark Up 26.6 186.9 Low 06:20:31 - 06:41:29 7613
Lake Havasu City 06:30:58 -30.2 Dark Up 27.2 187.2 Low 06:20:29 - 06:41:27 7579
Wildwood 06:31:15 -29.3 Dark Up 28.0 183.0 Low 06:20:46 - 06:41:44 7549
George/Scottsdale 06:30:48 -31.5 Dark Up 27.7 189.6 Low 06:20:19 - 06:41:17 7539
Idyllwild 06:31:07 -30.2 Dark Up 28.2 184.9 Low 06:20:38 - 06:41:36 7537
Calipatria 06:31:03 -31.1 Dark Up 28.7 186.1 Low 06:20:34 - 06:41:32 7506
Yuma 06:30:59 -31.8 Dark Up 29.1 187.0 Low 06:20:30 - 06:41:28 7484

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 470308, (2026/07/03 06:31UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  9.14  68
23Tau Sco      16:35:52.9 -28:12:58  2.8  7.53  66
PPM 266416     17:06:53.2 -26:30:47  6.3  1.54  60
PPM 266467     17:09:03.8 -27:53:42  8.3  0.21  59
PPM 266500     17:10:07.2 -27:51:24  9.5  0.04  59
470308         17:10:00.2 -27:53:25 16.8        59
Positions are for J2000

Event circumstances last updated at 2024/06/19 21:29:58 UT

Marc W. Buie, Southwest Research Institute

RECON