RECON: TNO occultation with 04KE19

Event between 04KE19 and star GA0660:07798819 with event index number of 1972785

Geocentric closest approach at 2023/05/18 05:50:46 UTC

J2000 position of star is 16:43:56.1 -23:04:26
Equinox of date position of star is 16:45:20.3 -23:06:57
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 147 degrees from the moon. Moon is 2% illuminated.
Apparent brightness V=22.8

[RECON map]
Object is 43.2 AU from the Sun and 42.3 AU from the Earth.
Apparent velocity is 23.7 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 234 seconds.
The 1-sigma cross-track error in the shadow position is 1708 km.
The sky-plane scale is 30646.4 km/arcsec.

The object has an absolute magnitude Hv=6.4
Diameter=319.2 km assuming a 5% albedo -- 13.5 sec chord
Diameter=130.3 km assuming a 30% albedo -- 5.5 sec chord
Dynamical classification is CLASSICAL
 
 
 
 
 
 

Star training set for 04KE19, (2023/05/18 05:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:50.7 -26:28:55  0.9  4.71 150
23Tau Sco      16:37:20.5 -28:15:45  2.8  5.45 148
PPM 232040     16:43:16.3 -19:58:02  5.8  3.19 148
PPM 265861     16:45:14.7 -23:10:26  8.4  0.06 147
04KE19         16:45:20.6 -23:06:57 15.9       147
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 3.8 sigma about the mid-time.
The median site spacing is 23.9 km RECON observability=0.1 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 05:52:45 -16.9 AT Down 9.5 149.4 Really Low 05:37:45 - 06:07:45 14461
Kamloops 05:53:19 -14.7 AT Down 5.3 137.2 Really Low 05:38:19 - 06:08:19 14051
Kelowna 05:53:19 -15.7 AT Down 6.3 137.9 Really Low 05:38:19 - 06:08:19 14034
Peachland 05:53:19 -15.7 AT Down 6.2 137.6 Really Low 05:38:19 - 06:08:19 14021
Summerland 05:53:20 -15.8 AT Down 6.4 137.7 Really Low 05:38:20 - 06:08:20 14016
Penticton 05:53:20 -15.9 AT Down 6.5 137.8 Really Low 05:38:20 - 06:08:20 14015
Oliver 05:53:22 -16.2 AT Down 6.7 137.8 Really Low 05:38:22 - 06:08:22 13997
Anarchist Mountain Observatory 05:53:22 -16.4 AT Down 6.9 137.9 Really Low 05:38:22 - 06:08:22 13994
Okanogan 05:53:22 -16.9 AT Down 7.3 137.7 Really Low 05:38:22 - 06:08:22 13954
Brewster 05:53:26 -17.1 AT Down 7.4 137.5 Really Low 05:38:26 - 06:08:26 13934
Manson/Chelan 05:53:25 -17.1 AT Down 7.4 137.2 Really Low 05:38:25 - 06:08:25 13913
Dunrhomin 05:53:03 -28.4 Dark Down 19.9 148.6 Really Low 05:38:03 - 06:08:03 13897
Nikitin 05:53:03 -28.6 Dark Down 20.1 148.5 Low 05:38:03 - 06:08:03 13886
Wenatchee 05:53:26 -17.5 AT Down 7.7 137.0 Really Low 05:38:26 - 06:08:26 13882
CU-SBO 05:53:03 -28.6 Dark Down 20.1 148.4 Low 05:38:03 - 06:08:03 13880
Victoria 05:53:30 -15.5 AT Down 5.5 134.6 Really Low 05:38:30 - 06:08:30 13856
Ellensburg 05:53:28 -17.8 AT Down 7.9 136.8 Really Low 05:38:28 - 06:08:28 13853
PNWRO 05:53:27 -19.2 Dark Down 9.4 138.0 Really Low 05:38:27 - 06:08:27 13845
Yakima 05:53:29 -18.1 Dark Down 8.2 136.7 Really Low 05:38:29 - 06:08:29 13830
Toppenish/White Swan 05:53:29 -18.4 Dark Down 8.4 136.8 Really Low 05:38:29 - 06:08:29 13823
The Dalles 05:53:32 -18.7 Dark Down 8.6 136.1 Really Low 05:38:32 - 06:08:32 13756
Maupin 05:53:34 -19.1 Dark Down 9.0 136.2 Really Low 05:38:34 - 06:08:34 13735
Sisters 05:53:35 -19.7 Dark Down 9.4 135.7 Really Low 05:38:35 - 06:08:35 13669
Bend 05:53:36 -20.0 Dark Down 9.7 135.9 Really Low 05:38:36 - 06:08:36 13662
Oregon Observatory 05:53:38 -20.1 Dark Down 9.7 135.8 Really Low 05:38:38 - 06:08:38 13648
Chiloquin 05:53:41 -21.1 Dark Down 10.5 135.3 Really Low 05:38:41 - 06:08:41 13555
Cedarville 05:53:38 -22.6 Dark Down 12.1 136.5 Really Low 05:38:38 - 06:08:38 13542
Klamath Falls 05:53:41 -21.4 Dark Down 10.7 135.3 Really Low 05:38:41 - 06:08:41 13536
Fall River/Burney 05:53:42 -22.5 Dark Down 11.8 135.4 Really Low 05:38:42 - 06:08:42 13473
Gimple 05:53:43 -23.5 Dark Down 12.7 135.7 Really Low 05:38:43 - 06:08:43 13431
Greenville 05:53:43 -23.5 Dark Down 12.7 135.7 Really Low 05:38:43 - 06:08:43 13428
Reno 05:53:41 -24.4 Dark Down 13.7 136.4 Really Low 05:38:41 - 06:08:41 13425
Portola 05:53:43 -24.0 Dark Down 13.2 136.0 Really Low 05:38:43 - 06:08:43 13422
Quincy 05:53:43 -23.7 Dark Down 12.8 135.6 Really Low 05:38:43 - 06:08:43 13415
Yerington 05:53:42 -25.2 Dark Down 14.5 136.8 Really Low 05:38:42 - 06:08:42 13409
Carson City 05:53:42 -24.8 Dark Down 14.0 136.4 Really Low 05:38:42 - 06:08:42 13402
Hawthorne 05:53:40 -25.8 Dark Down 15.1 137.2 Really Low 05:38:40 - 06:08:40 13395
Gardnerville 05:53:43 -25.0 Dark Down 14.2 136.4 Really Low 05:38:43 - 06:08:43 13387
Beatty 05:53:38 -27.9 Dark Down 17.3 138.3 Really Low 05:38:38 - 06:08:38 13345
Lee Vining 05:53:43 -26.1 Dark Down 15.2 136.7 Really Low 05:38:43 - 06:08:43 13342
Patrick 05:53:33 -30.3 Dark Down 19.9 140.3 Really Low 05:38:33 - 06:08:33 13335
Bishop 05:53:42 -26.9 Dark Down 16.1 137.1 Really Low 05:38:42 - 06:08:42 13325
Laughlin/Bullhead City 05:53:35 -30.3 Dark Down 19.7 139.6 Really Low 05:38:35 - 06:08:35 13295
George/Scottsdale 05:53:30 -32.6 Dark Down 22.3 141.5 Low 05:38:30 - 06:08:30 13281
Lake Havasu City 05:53:36 -31.0 Dark Down 20.4 139.7 Low 05:38:36 - 06:08:36 13257
Idyllwild 05:53:43 -30.7 Dark Down 19.7 137.6 Really Low 05:38:43 - 06:08:43 13126
Calipatria 05:53:41 -31.7 Dark Down 20.8 138.4 Low 05:38:41 - 06:08:41 13120
Yuma 05:53:39 -32.5 Dark Down 21.6 139.0 Low 05:38:39 - 06:08:39 13118
Wildwood 05:53:48 -29.6 Dark Down 18.3 136.3 Really Low 05:38:48 - 06:08:48 13088

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 04KE19, (2023/05/18 05:51UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9  4.71 150
23Tau Sco      16:35:52.9 -28:12:58  2.8  5.45 148
PPM 232040     16:41:53.8 -19:55:27  5.8  3.19 148
PPM 265861     16:43:50.2 -23:07:54  8.4  0.06 147
04KE19         16:43:56.1 -23:04:26 15.9       147
Positions are for J2000

Event circumstances last updated at 2023/04/18 02:25:16 UT

Marc W. Buie, Southwest Research Institute

RECON