RECON: TNO occultation with 492338

Event between (492338) 14FW and star GA0660:34528730 with event index number of 2321230

Geocentric closest approach at 2023/07/04 06:20:00 UTC

J2000 position of star is 18:44:22.5 -23:32:43
Equinox of date position of star is 18:45:47.5 -23:31:12
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 14 degrees from the moon. Moon is 99% illuminated.
Apparent brightness V=21.3

[RECON map]
Object is 14.1 AU from the Sun and 13.1 AU from the Earth.
Apparent velocity is 20.7 km/sec on the sky relative to the star, or, 7.9 arcsec/hr.
The 1-sigma error in the time of the event is 97 seconds.
The 1-sigma cross-track error in the shadow position is 713 km.
The sky-plane scale is 9471.0 km/arcsec.

The object has an absolute magnitude Hv=10.0
Diameter=59.4 km assuming a 5% albedo -- 2.9 sec chord
Diameter=24.3 km assuming a 30% albedo -- 1.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 492338, (2023/07/04 06:20UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.1 -26:28:56  0.9 30.63  43
Nunki          18:56:43.3 -26:15:55  2.0  3.70  11
26 Sgr         18:43:17.6 -23:48:34  6.2  0.64  14
PPM 268791     18:44:23.9 -23:56:34  7.6  0.53  14
PPM 268823     18:45:42.5 -23:32:42  9.6  0.03  14
492338         18:45:48.2 -23:31:11 15.4        13
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 17.0 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)
Kamloops 06:20:31 -12.8 AT Up 12.7 157.2 Really Low 06:11:56 - 06:29:07 7967
Sleaford 06:19:43 -14.3 AT Up 13.9 170.5 Really Low 06:11:08 - 06:28:19 7959
Kelowna 06:20:30 -13.8 AT Up 13.7 158.0 Really Low 06:11:54 - 06:29:05 7944
Peachland 06:20:31 -13.8 AT Up 13.7 157.7 Really Low 06:11:55 - 06:29:06 7941
Summerland 06:20:31 -14.0 AT Up 13.9 157.8 Really Low 06:11:55 - 06:29:06 7937
Penticton 06:20:31 -14.1 AT Up 14.0 157.9 Really Low 06:11:55 - 06:29:06 7935
Oliver 06:20:31 -14.4 AT Up 14.3 157.8 Really Low 06:11:55 - 06:29:06 7925
Anarchist Mountain Observatory 06:20:31 -14.6 AT Up 14.5 158.0 Really Low 06:11:56 - 06:29:07 7920
Victoria 06:20:45 -13.9 AT Up 13.9 154.3 Really Low 06:12:09 - 06:29:20 7900
Okanogan 06:20:33 -15.2 AT Up 15.1 157.7 Really Low 06:11:57 - 06:29:08 7900
Brewster 06:20:34 -15.4 AT Up 15.3 157.5 Really Low 06:11:59 - 06:29:10 7891
Manson/Chelan 06:20:35 -15.4 AT Up 15.4 157.2 Really Low 06:12:00 - 06:29:11 7885
Wenatchee 06:20:37 -15.8 AT Up 15.8 157.0 Really Low 06:12:01 - 06:29:12 7869
Ellensburg 06:20:38 -16.1 AT Up 16.1 156.7 Really Low 06:12:03 - 06:29:14 7855
Yakima 06:20:39 -16.5 AT Up 16.4 156.7 Really Low 06:12:04 - 06:29:15 7841
Toppenish/White Swan 06:20:39 -16.7 AT Up 16.7 156.8 Really Low 06:12:04 - 06:29:15 7834
PNWRO 06:20:35 -17.5 AT Up 17.4 158.1 Really Low 06:12:00 - 06:29:11 7822
The Dalles 06:20:43 -17.2 AT Up 17.2 156.0 Really Low 06:12:07 - 06:29:18 7806
Maupin 06:20:44 -17.6 AT Up 17.6 156.0 Really Low 06:12:09 - 06:29:20 7791
Sisters 06:20:48 -18.3 Dark Up 18.3 155.5 Really Low 06:12:12 - 06:29:23 7757
Bend 06:20:47 -18.6 Dark Up 18.6 155.7 Really Low 06:12:12 - 06:29:23 7749
Oregon Observatory 06:20:48 -18.7 Dark Up 18.7 155.5 Really Low 06:12:12 - 06:29:23 7742
Chiloquin 06:20:51 -19.7 Dark Up 19.8 155.0 Really Low 06:12:16 - 06:29:27 7688
Klamath Falls 06:20:52 -20.0 Dark Up 20.1 155.0 Low 06:12:17 - 06:29:28 7674
Cedarville 06:20:47 -21.2 Dark Up 21.2 156.4 Low 06:12:12 - 06:29:23 7646
Fall River/Burney 06:20:53 -21.2 Dark Up 21.3 155.2 Low 06:12:17 - 06:29:28 7623
Greenville 06:20:53 -22.2 Dark Up 22.2 155.4 Low 06:12:17 - 06:29:28 7582
Gimple 06:20:52 -22.2 Dark Up 22.3 155.5 Low 06:12:17 - 06:29:28 7582
Quincy 06:20:53 -22.4 Dark Up 22.4 155.4 Low 06:12:17 - 06:29:28 7573
Portola 06:20:51 -22.7 Dark Up 22.7 155.8 Low 06:12:16 - 06:29:27 7568
Reno 06:20:49 -23.1 Dark Up 23.1 156.4 Low 06:12:14 - 06:29:25 7556
Carson City 06:20:50 -23.4 Dark Up 23.5 156.3 Low 06:12:15 - 06:29:26 7539
Yerington 06:20:48 -23.8 Dark Up 23.8 156.9 Low 06:12:13 - 06:29:24 7529
Gardnerville 06:20:51 -23.7 Dark Up 23.7 156.3 Low 06:12:15 - 06:29:26 7527
Dunrhomin 06:19:52 -26.0 Dark Up 25.6 170.6 Low 06:11:17 - 06:28:28 7527
Nikitin 06:19:53 -26.2 Dark Up 25.8 170.5 Low 06:11:17 - 06:28:28 7519
CU-SBO 06:19:53 -26.2 Dark Up 25.9 170.4 Low 06:11:17 - 06:28:28 7516
Hawthorne 06:20:47 -24.4 Dark Up 24.4 157.3 Low 06:12:12 - 06:29:23 7507
Lee Vining 06:20:50 -24.8 Dark Up 24.8 156.8 Low 06:12:14 - 06:29:25 7480
Bishop 06:20:48 -25.6 Dark Up 25.6 157.3 Low 06:12:12 - 06:29:23 7449
Beatty 06:20:43 -26.5 Dark Up 26.5 158.8 Low 06:12:07 - 06:29:18 7423
Patrick 06:20:33 -28.7 Dark Up 28.7 161.4 Low 06:11:57 - 06:29:08 7336
Laughlin/Bullhead City 06:20:36 -28.8 Dark Up 28.7 160.6 Low 06:12:01 - 06:29:12 7325
Lake Havasu City 06:20:36 -29.5 Dark Up 29.4 160.8 Low 06:12:01 - 06:29:12 7287
Wildwood 06:20:54 -28.4 Dark Up 28.5 156.5 Low 06:12:19 - 06:29:30 7273
Idyllwild 06:20:47 -29.4 Dark Up 29.5 158.3 Low 06:12:12 - 06:29:23 7251
George/Scottsdale 06:20:27 -30.9 Dark Up 30.8 163.1 Up 06:11:51 - 06:29:02 7233
Calipatria 06:20:43 -30.4 Dark Up 30.4 159.3 Up 06:12:08 - 06:29:19 7212
Yuma 06:20:40 -31.1 Dark Up 31.0 160.1 Up 06:12:04 - 06:29:15 7185

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, (2023/07/04 06:20UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.63  43
Nunki          18:55:15.9 -26:17:49  2.0  3.70  11
26 Sgr         18:41:51.7 -23:50:01  6.2  0.64  14
PPM 268791     18:42:57.9 -23:58:03  7.6  0.53  14
PPM 268823     18:44:16.8 -23:34:14  9.6  0.03  14
492338         18:44:22.5 -23:32:43 15.4        14
Positions are for J2000

Event circumstances last updated at 2023/04/19 02:39:44 UT

Marc W. Buie, Southwest Research Institute

RECON