RECON: TNO occultation with 492338

Event between (492338) 14FW and star GA0660:33062150 with event index number of 2321346

Geocentric closest approach at 2023/08/04 08:02:47 UTC

J2000 position of star is 18:37:58.5 -23:47:41
Equinox of date position of star is 18:39:24.6 -23:46:22
Stellar brightness G=16.1, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 70 degrees from the moon. Moon is 90% illuminated.
Apparent brightness V=21.6

[RECON map]
Object is 14.1 AU from the Sun and 13.3 AU from the Earth.
Apparent velocity is 15.9 km/sec on the sky relative to the star, or, 5.9 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 671 km.
The sky-plane scale is 9635.0 km/arcsec.

The object has an absolute magnitude Hv=10.0
Diameter=59.4 km assuming a 5% albedo -- 3.7 sec chord
Diameter=24.3 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 492338, (2023/08/04 08:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.5 -26:28:56  0.9 29.15  98
Nunki          18:56:43.6 -26:15:55  2.0  4.65  66
PPM 268694     18:39:56.8 -23:28:58  6.3  0.31  69
PPM 268684     18:39:36.5 -23:41:49  8.5  0.09  69
492338         18:39:24.7 -23:46:22 16.1        69
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 61.6 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)
Kamloops 07:59:30 -22.0 Dark Up 10.1 210.1 Really Low 07:48:48 - 08:10:13 5508
Victoria 07:59:37 -24.1 Dark Up 13.0 207.7 Really Low 07:48:55 - 08:10:20 5491
Peachland 07:59:26 -23.0 Dark Up 10.8 210.7 Really Low 07:48:43 - 08:10:08 5452
Kelowna 07:59:25 -22.9 Dark Up 10.6 210.9 Really Low 07:48:43 - 08:10:08 5449
Summerland 07:59:25 -23.1 Dark Up 10.9 210.8 Really Low 07:48:43 - 08:10:08 5443
Penticton 07:59:25 -23.2 Dark Up 10.9 210.9 Really Low 07:48:42 - 08:10:07 5437
Oliver 07:59:24 -23.5 Dark Up 11.2 210.9 Really Low 07:48:42 - 08:10:07 5421
Anarchist Mountain Observatory 07:59:23 -23.7 Dark Up 11.3 211.1 Really Low 07:48:40 - 08:10:05 5409
Okanogan 07:59:22 -24.4 Dark Up 11.9 211.0 Really Low 07:48:40 - 08:10:05 5384
Manson/Chelan 07:59:23 -24.8 Dark Up 12.5 210.5 Really Low 07:48:41 - 08:10:06 5377
Brewster 07:59:22 -24.6 Dark Up 12.2 210.8 Really Low 07:48:40 - 08:10:05 5377
Wenatchee 07:59:23 -25.3 Dark Up 13.0 210.4 Really Low 07:48:40 - 08:10:05 5359
Ellensburg 07:59:23 -25.7 Dark Up 13.4 210.3 Really Low 07:48:40 - 08:10:05 5345
Yakima 07:59:22 -26.1 Dark Up 13.8 210.3 Really Low 07:48:39 - 08:10:04 5326
Toppenish/White Swan 07:59:21 -26.3 Dark Up 13.9 210.5 Really Low 07:48:38 - 08:10:03 5311
The Dalles 07:59:22 -27.1 Dark Up 14.8 209.9 Really Low 07:48:40 - 08:10:05 5293
Maupin 07:59:21 -27.5 Dark Up 15.2 210.1 Really Low 07:48:38 - 08:10:03 5269
PNWRO 07:59:14 -26.7 Dark Up 13.7 211.8 Really Low 07:48:32 - 08:09:57 5251
Sisters 07:59:21 -28.4 Dark Up 16.1 209.7 Really Low 07:48:39 - 08:10:04 5238
Bend 07:59:20 -28.6 Dark Up 16.2 210.0 Really Low 07:48:37 - 08:10:02 5219
Oregon Observatory 07:59:20 -28.8 Dark Up 16.4 209.9 Really Low 07:48:37 - 08:10:02 5213
Sleaford 07:58:50 -19.8 Dark Up 3.8 222.1 Really Low 07:48:07 - 08:09:32 5187
Chiloquin 07:59:19 -30.1 Dark Up 17.7 209.7 Really Low 07:48:36 - 08:10:01 5154
Klamath Falls 07:59:18 -30.4 Dark Up 18.0 209.9 Really Low 07:48:35 - 08:10:00 5133
Fall River/Burney 07:59:15 -31.6 Dark Up 18.9 210.4 Really Low 07:48:33 - 08:09:58 5056
Cedarville 07:59:10 -31.2 Dark Up 18.0 211.4 Really Low 07:48:28 - 08:09:53 5047
Greenville 07:59:11 -32.5 Dark Up 19.5 210.9 Really Low 07:48:28 - 08:09:53 4990
Gimple 07:59:11 -32.5 Dark Up 19.4 211.0 Really Low 07:48:29 - 08:09:54 4987
Quincy 07:59:11 -32.7 Dark Up 19.6 211.0 Really Low 07:48:29 - 08:09:54 4978
Portola 07:59:09 -32.9 Dark Up 19.6 211.4 Really Low 07:48:26 - 08:09:51 4956
Reno 07:59:05 -33.2 Dark Up 19.5 212.0 Really Low 07:48:23 - 08:09:48 4920
Carson City 07:59:05 -33.5 Dark Up 19.8 212.1 Really Low 07:48:22 - 08:09:47 4898
Gardnerville 07:59:04 -33.8 Dark Up 20.0 212.2 Low 07:48:22 - 08:09:47 4882
Yerington 07:59:01 -33.7 Dark Up 19.7 212.7 Really Low 07:48:19 - 08:09:44 4866
Hawthorne 07:58:59 -34.2 Dark Up 19.9 213.2 Really Low 07:48:16 - 08:09:41 4821
Lee Vining 07:59:00 -34.8 Dark Up 20.6 212.9 Low 07:48:18 - 08:09:43 4802
Bishop 07:58:56 -35.4 Dark Up 20.8 213.6 Low 07:48:13 - 08:09:38 4740
Beatty 07:58:48 -35.8 Dark Up 20.4 215.1 Low 07:48:06 - 08:09:31 4657
Wildwood 07:58:51 -38.6 Dark Up 23.6 214.2 Low 07:48:09 - 08:09:34 4531
Dunrhomin 07:58:12 -31.2 Dark Up 12.2 223.7 Really Low 07:47:30 - 08:08:55 4484
Nikitin 07:58:11 -31.4 Dark Up 12.3 223.7 Really Low 07:47:29 - 08:08:54 4473
CU-SBO 07:58:12 -31.5 Dark Up 12.4 223.6 Really Low 07:47:29 - 08:08:54 4471
Laughlin/Bullhead City 07:58:36 -37.5 Dark Up 20.8 217.3 Low 07:47:54 - 08:09:19 4467
Patrick 07:58:34 -37.2 Dark Up 20.3 217.8 Low 07:47:51 - 08:09:16 4460
Idyllwild 07:58:43 -39.0 Dark Up 23.0 215.9 Low 07:48:01 - 08:09:26 4443
Lake Havasu City 07:58:34 -38.1 Dark Up 21.2 217.6 Low 07:47:51 - 08:09:16 4412
Calipatria 07:58:37 -39.5 Dark Up 22.9 217.0 Low 07:47:55 - 08:09:20 4358
Yuma 07:58:32 -39.9 Dark Up 22.8 217.8 Low 07:47:50 - 08:09:15 4296
George/Scottsdale 07:58:23 -38.7 Dark Up 20.6 219.8 Low 07:47:41 - 08:09:06 4271

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 492338, (2023/08/04 08:03UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 29.15  98
Nunki          18:55:15.9 -26:17:49  2.0  4.65  66
PPM 268694     18:38:30.7 -23:30:18  6.3  0.31  69
PPM 268684     18:38:10.3 -23:43:08  8.5  0.09  69
492338         18:37:58.5 -23:47:41 16.1        69
Positions are for J2000

Event circumstances last updated at 2023/07/28 03:52:08 UT

Marc W. Buie, Southwest Research Institute

RECON