RECON: TNO occultation with 469442

Event between (469442) 02GG166 and star GA0600:18522650 with event index number of 1297252

Geocentric closest approach at 2023/08/10 04:54:44 UTC

J2000 position of star is 17:15:45.1 -29:15:00
Equinox of date position of star is 17:17:14.9 -29:16:29
Stellar brightness G=14.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 168 degrees from the moon. Moon is 32% illuminated.
Apparent brightness V=20.4

[RECON map]
Object is 15.8 AU from the Sun and 15.2 AU from the Earth.
Apparent velocity is 7.4 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 158 seconds.
The 1-sigma cross-track error in the shadow position is 801 km.
The sky-plane scale is 11046.4 km/arcsec.

The object has an absolute magnitude Hv=8.2
Diameter=136.1 km assuming a 5% albedo -- 18.4 sec chord
Diameter=55.6 km assuming a 30% albedo -- 7.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 469442, (2023/08/10 04:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.5 -26:28:56  0.9 10.62 178
26Eps Sco      16:51:41.9 -34:20:02  2.3  7.42 169
PPM 295967     17:10:18.2 -30:25:58  5.8  1.90 169
PPM 266661     17:19:53.4 -29:53:53  8.1  0.85 167
PPM 266619     17:17:18.4 -29:12:39  9.2  0.07 168
469442         17:17:15.0 -29:16:29 14.5       167
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 7.8 km RECON observability=0.3 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 04:55:17 -16.3 AT Down 5.2 203.8 Really Low 04:41:40 - 05:08:55 4145
Kelowna 04:57:01 -12.7 AT Down 9.9 192.6 Really Low 04:43:23 - 05:10:38 3994
Kamloops 04:57:13 -11.8 NT Down 9.2 191.8 Really Low 04:43:35 - 05:10:50 3994
Peachland 04:57:03 -12.7 AT Down 10.0 192.4 Really Low 04:43:25 - 05:10:40 3989
Penticton 04:57:01 -12.9 AT Down 10.2 192.5 Really Low 04:43:24 - 05:10:39 3988
Summerland 04:57:02 -12.8 AT Down 10.2 192.4 Really Low 04:43:24 - 05:10:39 3988
Anarchist Mountain Observatory 04:56:58 -13.4 AT Down 10.7 192.7 Really Low 04:43:21 - 05:10:36 3983
Oliver 04:56:59 -13.2 AT Down 10.6 192.5 Really Low 04:43:21 - 05:10:36 3983
Okanogan 04:56:58 -13.7 AT Down 11.4 192.6 Really Low 04:43:21 - 05:10:36 3969
Brewster 04:56:57 -13.8 AT Down 11.7 192.4 Really Low 04:43:20 - 05:10:35 3961
Manson/Chelan 04:57:01 -13.8 AT Down 11.9 192.1 Really Low 04:43:24 - 05:10:39 3952
Wenatchee 04:57:01 -14.0 AT Down 12.4 192.0 Really Low 04:43:23 - 05:10:38 3940
PNWRO 04:56:42 -15.7 AT Down 13.6 193.2 Really Low 04:43:04 - 05:10:19 3932
Ellensburg 04:57:00 -14.2 AT Down 12.8 191.8 Really Low 04:43:23 - 05:10:38 3929
Dunrhomin 04:54:01 -26.2 Dark Down 15.9 205.0 Really Low 04:40:23 - 05:07:38 3926
Nikitin 04:54:00 -26.4 Dark Down 16.0 205.0 Really Low 04:40:22 - 05:07:37 3920
Yakima 04:57:00 -14.5 AT Down 13.2 191.8 Really Low 04:43:23 - 05:10:38 3920
CU-SBO 04:54:01 -26.4 Dark Down 16.1 205.0 Really Low 04:40:23 - 05:07:38 3918
Toppenish/White Swan 04:56:57 -14.7 AT Down 13.4 191.9 Really Low 04:43:19 - 05:10:34 3918
Victoria 04:57:32 -11.8 NT Down 11.7 189.3 Really Low 04:43:54 - 05:11:09 3912
The Dalles 04:57:02 -14.8 AT Down 14.3 191.3 Really Low 04:43:24 - 05:10:39 3888
Maupin 04:57:00 -15.1 AT Down 14.7 191.4 Really Low 04:43:23 - 05:10:38 3880
Sisters 04:57:01 -15.5 AT Down 15.6 191.0 Really Low 04:43:24 - 05:10:39 3850
Bend 04:56:57 -15.8 AT Down 15.8 191.2 Really Low 04:43:20 - 05:10:35 3849
Oregon Observatory 04:56:59 -15.8 AT Down 16.0 191.1 Really Low 04:43:21 - 05:10:36 3842
Chiloquin 04:56:59 -16.4 AT Down 17.4 190.8 Really Low 04:43:22 - 05:10:37 3799
Cedarville 04:56:38 -18.0 Dark Down 18.1 192.3 Really Low 04:43:01 - 05:10:16 3796
Klamath Falls 04:56:56 -16.7 AT Down 17.7 190.9 Really Low 04:43:19 - 05:10:34 3790
Fall River/Burney 04:56:50 -17.7 AT Down 18.8 191.3 Really Low 04:43:12 - 05:10:27 3760
Gimple 04:56:40 -18.6 Dark Down 19.6 191.8 Really Low 04:43:03 - 05:10:18 3740
Greenville 04:56:42 -18.5 Dark Down 19.6 191.8 Really Low 04:43:05 - 05:10:20 3739
Reno 04:56:27 -19.5 Dark Down 20.0 192.8 Low 04:42:50 - 05:10:05 3738
Portola 04:56:36 -19.0 Dark Down 19.9 192.2 Really Low 04:42:58 - 05:10:13 3737
Quincy 04:56:40 -18.6 Dark Down 19.8 191.8 Really Low 04:43:03 - 05:10:18 3732
Yerington 04:56:18 -20.2 Dark Down 20.5 193.4 Low 04:42:40 - 05:09:55 3730
Carson City 04:56:26 -19.8 Dark Down 20.4 192.8 Low 04:42:48 - 05:10:03 3727
Hawthorne 04:56:10 -20.8 Dark Down 20.8 193.9 Low 04:42:33 - 05:09:48 3722
Gardnerville 04:56:23 -20.0 Dark Down 20.6 192.9 Low 04:42:46 - 05:10:01 3719
Lee Vining 04:56:13 -20.9 Dark Down 21.4 193.5 Low 04:42:36 - 05:09:51 3695
Beatty 04:55:43 -23.0 Dark Down 22.0 195.6 Low 04:42:06 - 05:09:21 3692
Bishop 04:56:04 -21.8 Dark Down 21.9 194.2 Low 04:42:26 - 05:09:41 3684
Patrick 04:55:06 -25.6 Dark Down 22.8 198.3 Low 04:41:29 - 05:08:44 3674
Laughlin/Bullhead City 04:55:12 -25.4 Dark Down 23.2 197.7 Low 04:41:35 - 05:08:50 3654
Lake Havasu City 04:55:06 -26.0 Dark Down 23.8 198.0 Low 04:41:28 - 05:08:43 3630
George/Scottsdale 04:54:35 -27.9 Dark Down 23.9 200.3 Low 04:40:58 - 05:08:13 3628
Idyllwild 04:55:30 -25.1 Dark Down 25.1 196.0 Low 04:41:53 - 05:09:08 3564
Calipatria 04:55:14 -26.2 Dark Down 25.4 197.1 Low 04:41:36 - 05:08:51 3553
Wildwood 04:55:52 -23.8 Dark Down 25.1 194.3 Low 04:42:14 - 05:09:29 3547
Yuma 04:55:03 -27.0 Dark Down 25.6 198.0 Low 04:41:25 - 05:08:40 3547

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 469442, (2023/08/10 04:55UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.62 178
26Eps Sco      16:50:08.8 -34:17:41  2.3  7.42 169
PPM 295967     17:08:47.5 -30:24:15  5.8  1.90 169
PPM 266661     17:18:23.0 -29:52:29  8.1  0.85 167
PPM 266619     17:15:48.5 -29:11:09  9.2  0.07 168
469442         17:15:45.1 -29:15:00 14.5       168
Positions are for J2000

Event circumstances last updated at 2023/07/28 03:52:35 UT

Marc W. Buie, Southwest Research Institute

RECON