RECON: TNO occultation with 492338

Event between (492338) 14FW and star GA0660:34003517 with event index number of 2321274

Geocentric closest approach at 2023/07/16 06:23:48 UTC

J2000 position of star is 18:41:42.6 -23:38:56
Equinox of date position of star is 18:43:07.7 -23:37:30
Stellar brightness G=16.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 175 degrees from the moon. Moon is 2% illuminated.
Apparent brightness V=21.5

[RECON map]
Object is 14.1 AU from the Sun and 13.1 AU from the Earth.
Apparent velocity is 19.9 km/sec on the sky relative to the star, or, 7.5 arcsec/hr.
The 1-sigma error in the time of the event is 101 seconds.
The 1-sigma cross-track error in the shadow position is 615 km.
The sky-plane scale is 9510.9 km/arcsec.

The object has an absolute magnitude Hv=10.0
Diameter=59.4 km assuming a 5% albedo -- 3.0 sec chord
Diameter=24.3 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 492338, (2023/07/16 06:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.3 -26:28:56  0.9 30.01 153
Nunki          18:56:43.4 -26:15:55  2.0  4.06 174
26 Sgr         18:43:17.7 -23:48:34  6.2  0.19 175
PPM 268745     18:42:42.7 -23:43:44  9.4  0.14 175
492338         18:43:08.5 -23:37:29 16.7       175
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 17.4 km RECON observability=0.6 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 06:23:37 -14.4 AT Down 15.0 169.5 Really Low 06:14:41 - 06:32:33 4315
Kelowna 06:23:34 -15.4 AT Down 15.9 170.3 Really Low 06:14:38 - 06:32:30 4286
Peachland 06:23:35 -15.4 AT Down 16.0 170.0 Really Low 06:14:39 - 06:32:31 4285
Summerland 06:23:35 -15.5 AT Down 16.2 170.1 Really Low 06:14:39 - 06:32:31 4280
Penticton 06:23:35 -15.6 AT Down 16.3 170.2 Really Low 06:14:39 - 06:32:31 4277
Victoria 06:23:50 -15.4 AT Down 16.7 166.6 Really Low 06:14:54 - 06:32:46 4267
Oliver 06:23:36 -15.9 AT Down 16.6 170.2 Really Low 06:14:40 - 06:32:32 4266
Anarchist Mountain Observatory 06:23:35 -16.2 AT Down 16.8 170.4 Really Low 06:14:39 - 06:32:31 4260
Okanogan 06:23:36 -16.7 AT Down 17.4 170.1 Really Low 06:14:40 - 06:32:32 4241
Brewster 06:23:37 -16.9 AT Down 17.6 169.9 Really Low 06:14:41 - 06:32:33 4233
Manson/Chelan 06:23:39 -17.0 AT Down 17.8 169.6 Really Low 06:14:43 - 06:32:35 4229
Sleaford 06:22:47 -15.8 AT Down 14.2 183.0 Really Low 06:13:51 - 06:31:43 4217
Wenatchee 06:23:40 -17.3 AT Down 18.3 169.4 Really Low 06:14:44 - 06:32:36 4214
Ellensburg 06:23:42 -17.7 AT Down 18.6 169.2 Really Low 06:14:46 - 06:32:38 4202
Yakima 06:23:42 -18.0 Dark Down 19.0 169.1 Really Low 06:14:46 - 06:32:38 4188
Toppenish/White Swan 06:23:41 -18.3 Dark Down 19.3 169.3 Really Low 06:14:45 - 06:32:37 4179
The Dalles 06:23:46 -18.7 Dark Down 19.9 168.5 Really Low 06:14:50 - 06:32:42 4156
PNWRO 06:23:36 -19.0 Dark Down 19.8 170.7 Really Low 06:14:40 - 06:32:32 4156
Maupin 06:23:46 -19.1 Dark Down 20.3 168.5 Low 06:14:50 - 06:32:42 4140
Sisters 06:23:48 -19.8 Dark Down 21.1 168.0 Low 06:14:52 - 06:32:44 4110
Bend 06:23:47 -20.1 Dark Down 21.4 168.2 Low 06:14:51 - 06:32:43 4099
Oregon Observatory 06:23:48 -20.2 Dark Down 21.6 168.1 Low 06:14:52 - 06:32:44 4093
Chiloquin 06:23:52 -21.2 Dark Down 22.8 167.6 Low 06:14:56 - 06:32:48 4042
Klamath Falls 06:23:51 -21.6 Dark Down 23.1 167.6 Low 06:14:55 - 06:32:47 4026
Cedarville 06:23:46 -22.7 Dark Down 24.1 169.1 Low 06:14:50 - 06:32:42 3986
Fall River/Burney 06:23:52 -22.7 Dark Down 24.3 167.9 Low 06:14:56 - 06:32:48 3972
Greenville 06:23:51 -23.7 Dark Down 25.3 168.3 Low 06:14:55 - 06:32:47 3928
Gimple 06:23:50 -23.7 Dark Down 25.3 168.3 Low 06:14:54 - 06:32:46 3927
Quincy 06:23:51 -23.9 Dark Down 25.5 168.3 Low 06:14:55 - 06:32:47 3918
Portola 06:23:49 -24.2 Dark Down 25.7 168.7 Low 06:14:53 - 06:32:45 3909
Reno 06:23:46 -24.6 Dark Down 26.1 169.3 Low 06:14:50 - 06:32:42 3892
Carson City 06:23:47 -24.9 Dark Down 26.4 169.3 Low 06:14:51 - 06:32:43 3874
Gardnerville 06:23:47 -25.2 Dark Down 26.7 169.3 Low 06:14:51 - 06:32:43 3862
Yerington 06:23:45 -25.3 Dark Down 26.7 169.9 Low 06:14:49 - 06:32:41 3860
Hawthorne 06:23:43 -25.9 Dark Down 27.2 170.4 Low 06:14:47 - 06:32:39 3832
Lee Vining 06:23:46 -26.3 Dark Down 27.7 169.9 Low 06:14:50 - 06:32:42 3809
Bishop 06:23:43 -27.1 Dark Down 28.4 170.6 Low 06:14:47 - 06:32:39 3772
Dunrhomin 06:22:45 -27.5 Dark Down 26.0 184.0 Low 06:13:49 - 06:31:41 3751
Nikitin 06:22:45 -27.7 Dark Down 26.2 184.0 Low 06:13:49 - 06:31:41 3742
CU-SBO 06:22:46 -27.7 Dark Down 26.2 183.9 Low 06:13:50 - 06:31:42 3740
Beatty 06:23:36 -28.0 Dark Down 29.0 172.2 Low 06:14:40 - 06:32:32 3732
Patrick 06:23:25 -30.3 Dark Down 30.8 175.1 Up 06:14:29 - 06:32:21 3620
Laughlin/Bullhead City 06:23:28 -30.3 Dark Down 31.0 174.3 Up 06:14:32 - 06:32:24 3614
Wildwood 06:23:47 -29.9 Dark Down 31.6 170.1 Up 06:14:51 - 06:32:43 3595
Lake Havasu City 06:23:28 -31.0 Dark Down 31.7 174.6 Up 06:14:32 - 06:32:24 3573
Idyllwild 06:23:39 -30.9 Dark Down 32.2 172.0 Up 06:14:43 - 06:32:35 3557
Calipatria 06:23:34 -31.9 Dark Down 32.9 173.2 Up 06:14:38 - 06:32:30 3507
George/Scottsdale 06:23:17 -32.4 Dark Down 32.6 177.2 Up 06:14:21 - 06:32:13 3498
Yuma 06:23:30 -32.6 Dark Down 33.4 174.1 Up 06:14:34 - 06:32:26 3471

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, (2023/07/16 06:24UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.01 153
Nunki          18:55:15.9 -26:17:49  2.0  4.06 174
26 Sgr         18:41:51.7 -23:50:01  6.2  0.19 175
PPM 268745     18:41:16.7 -23:45:10  9.4  0.14 175
492338         18:41:42.6 -23:38:56 16.7       175
Positions are for J2000

Event circumstances last updated at 2023/04/19 02:41:33 UT

Marc W. Buie, Southwest Research Institute

RECON