RECON: TNO occultation with 492338

Event between (492338) 14FW and star GA0660:34407140 with event index number of 2321238

Geocentric closest approach at 2023/07/07 07:22:06 UTC

J2000 position of star is 18:43:41.4 -23:34:21
Equinox of date position of star is 18:45:06.4 -23:32:51
Stellar brightness G=15.7, 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 80% illuminated.
Apparent brightness V=21.4

[RECON map]
Object is 14.1 AU from the Sun and 13.1 AU from the Earth.
Apparent velocity is 20.6 km/sec on the sky relative to the star, or, 7.8 arcsec/hr.
The 1-sigma error in the time of the event is 99 seconds.
The 1-sigma cross-track error in the shadow position is 613 km.
The sky-plane scale is 9478.2 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, (2023/07/07 07:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.2 -26:28:56  0.9 30.47  88
Nunki          18:56:43.3 -26:15:55  2.0  3.78  56
26 Sgr         18:43:17.6 -23:48:34  6.2  0.49  59
PPM 268791     18:44:24.0 -23:56:34  7.6  0.43  59
PPM 268823     18:45:42.6 -23:32:42  9.6  0.14  58
492338         18:45:07.2 -23:32:50 15.7        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 15.6 km RECON observability=0.7 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 07:21:36 -16.1 AT Up 15.6 174.4 Really Low 07:12:53 - 07:30:20 4012
Kelowna 07:21:34 -17.0 AT Up 16.4 175.2 Really Low 07:12:51 - 07:30:18 3980
Peachland 07:21:35 -17.0 AT Up 16.5 175.0 Really Low 07:12:52 - 07:30:19 3980
Summerland 07:21:35 -17.2 AT Up 16.7 175.0 Really Low 07:12:51 - 07:30:18 3975
Victoria 07:21:48 -17.8 AT Up 17.5 171.5 Really Low 07:13:05 - 07:30:32 3972
Penticton 07:21:34 -17.3 AT Up 16.8 175.1 Really Low 07:12:51 - 07:30:18 3971
Oliver 07:21:35 -17.6 AT Up 17.1 175.1 Really Low 07:12:51 - 07:30:18 3960
Anarchist Mountain Observatory 07:21:34 -17.8 AT Up 17.3 175.3 Really Low 07:12:51 - 07:30:18 3954
Okanogan 07:21:36 -18.4 Dark Up 17.9 175.1 Really Low 07:12:52 - 07:30:19 3934
Brewster 07:21:36 -18.7 Dark Up 18.2 174.9 Really Low 07:12:53 - 07:30:20 3927
Manson/Chelan 07:21:38 -18.8 Dark Up 18.4 174.5 Really Low 07:12:54 - 07:30:21 3924
Wenatchee 07:21:39 -19.3 Dark Up 18.8 174.4 Really Low 07:12:55 - 07:30:22 3909
Ellensburg 07:21:40 -19.7 Dark Up 19.2 174.1 Really Low 07:12:56 - 07:30:23 3897
Yakima 07:21:40 -20.0 Dark Up 19.6 174.1 Really Low 07:12:57 - 07:30:24 3883
Sleaford 07:20:49 -15.3 AT Up 14.0 187.9 Really Low 07:12:05 - 07:29:32 3879
Toppenish/White Swan 07:21:40 -20.3 Dark Up 19.9 174.3 Really Low 07:12:56 - 07:30:23 3873
The Dalles 07:21:43 -20.9 Dark Up 20.6 173.5 Low 07:13:00 - 07:30:27 3852
PNWRO 07:21:34 -20.8 Dark Up 20.3 175.7 Low 07:12:51 - 07:30:18 3845
Maupin 07:21:43 -21.4 Dark Up 21.0 173.6 Low 07:13:00 - 07:30:27 3835
Sisters 07:21:45 -22.2 Dark Up 21.8 173.0 Low 07:13:02 - 07:30:29 3806
Bend 07:21:45 -22.4 Dark Up 22.1 173.3 Low 07:13:01 - 07:30:28 3794
Oregon Observatory 07:21:46 -22.6 Dark Up 22.2 173.1 Low 07:13:02 - 07:30:29 3788
Chiloquin 07:21:48 -23.8 Dark Up 23.5 172.7 Low 07:13:05 - 07:30:32 3737
Klamath Falls 07:21:48 -24.1 Dark Up 23.9 172.7 Low 07:13:05 - 07:30:32 3722
Cedarville 07:21:42 -25.1 Dark Up 24.7 174.3 Low 07:12:59 - 07:30:26 3675
Fall River/Burney 07:21:48 -25.4 Dark Up 25.1 173.1 Low 07:13:04 - 07:30:31 3665
Greenville 07:21:47 -26.3 Dark Up 26.0 173.5 Low 07:13:03 - 07:30:30 3619
Gimple 07:21:46 -26.3 Dark Up 26.0 173.5 Low 07:13:03 - 07:30:30 3618
Quincy 07:21:47 -26.5 Dark Up 26.2 173.4 Low 07:13:03 - 07:30:30 3609
Portola 07:21:45 -26.7 Dark Up 26.4 173.9 Low 07:13:02 - 07:30:29 3598
Reno 07:21:42 -27.1 Dark Up 26.7 174.6 Low 07:12:59 - 07:30:26 3578
Carson City 07:21:42 -27.4 Dark Up 27.0 174.6 Low 07:12:59 - 07:30:26 3561
Gardnerville 07:21:42 -27.7 Dark Up 27.3 174.6 Low 07:12:59 - 07:30:26 3548
Yerington 07:21:40 -27.7 Dark Up 27.3 175.2 Low 07:12:56 - 07:30:23 3544
Hawthorne 07:21:38 -28.2 Dark Up 27.8 175.7 Low 07:12:55 - 07:30:22 3514
Lee Vining 07:21:41 -28.7 Dark Up 28.3 175.2 Low 07:12:57 - 07:30:24 3492
Bishop 07:21:38 -29.4 Dark Up 29.0 175.9 Low 07:12:55 - 07:30:22 3452
Beatty 07:21:32 -30.1 Dark Up 29.5 177.6 Low 07:12:48 - 07:30:15 3406
Dunrhomin 07:20:44 -27.0 Dark Up 25.6 189.3 Low 07:12:00 - 07:29:27 3391
Nikitin 07:20:44 -27.2 Dark Up 25.8 189.2 Low 07:12:00 - 07:29:27 3382
CU-SBO 07:20:44 -27.3 Dark Up 25.9 189.2 Low 07:12:01 - 07:29:28 3381
Patrick 07:21:20 -31.8 Dark Up 31.0 180.6 Up 07:12:37 - 07:30:04 3283
Laughlin/Bullhead City 07:21:23 -32.0 Dark Up 31.3 179.9 Up 07:12:40 - 07:30:07 3279
Wildwood 07:21:41 -32.6 Dark Up 32.2 175.6 Up 07:12:58 - 07:30:25 3273
Lake Havasu City 07:21:23 -32.7 Dark Up 31.9 180.1 Up 07:12:39 - 07:30:06 3237
Idyllwild 07:21:33 -33.2 Dark Up 32.7 177.6 Up 07:12:50 - 07:30:17 3228
Calipatria 07:21:28 -33.9 Dark Up 33.3 178.8 Up 07:12:45 - 07:30:12 3174
George/Scottsdale 07:21:12 -33.6 Dark Up 32.7 182.8 Up 07:12:29 - 07:29:56 3152
Yuma 07:21:24 -34.5 Dark Up 33.7 179.8 Up 07:12:41 - 07:30:08 3134

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, (2023/07/07 07:22UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 30.47  88
Nunki          18:55:15.9 -26:17:49  2.0  3.78  56
26 Sgr         18:41:51.7 -23:50:01  6.2  0.49  59
PPM 268791     18:42:57.9 -23:58:03  7.6  0.43  59
PPM 268823     18:44:16.8 -23:34:14  9.6  0.14  58
492338         18:43:41.4 -23:34:21 15.7        59
Positions are for J2000

Event circumstances last updated at 2023/04/19 02:40:05 UT

Marc W. Buie, Southwest Research Institute

RECON