RECON: TNO occultation with 307251

Event between (307251) 02KW14 and star GA0620:15750876 with event index number of 2296026

Geocentric closest approach at 2023/07/28 07:04:35 UTC

J2000 position of star is 17:17:46.6 -26:47:24
Equinox of date position of star is 17:19:14.7 -26:48:50
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 17 degrees from the moon. Moon is 74% illuminated.
Apparent brightness V=21.9

[RECON map]
Object is 43.1 AU from the Sun and 42.4 AU from the Earth.
Apparent velocity is 16.4 km/sec on the sky relative to the star, or, 1.9 arcsec/hr.
The 1-sigma error in the time of the event is 805 seconds.
The 1-sigma cross-track error in the shadow position is 4214 km.
The sky-plane scale is 30749.6 km/arcsec.

The object has an absolute magnitude Hv=5.5
Diameter=457.1 km assuming a 5% albedo -- 29.1 sec chord
Diameter=186.6 km assuming a 30% albedo -- 11.9 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 307251, (2023/07/28 07:05UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:51.4 -26:28:56  0.9 10.81   6
23Tau Sco      16:37:21.2 -28:15:46  2.8  9.40   8
PPM 266626     17:17:40.6 -26:34:39  6.5  0.42  16
PPM 266648     17:19:07.5 -26:39:08  7.0  0.16  17
307251         17:19:14.7 -26:48:50 16.4        17
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 1.1 sigma about the mid-time.
The median site spacing is 46.4 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)
Kamloops 07:03:08 -18.9 Dark Up 7.6 208.2 Really Low 06:48:08 - 07:18:08 14757
Victoria 07:03:17 -20.3 Dark Up 10.4 205.8 Really Low 06:48:17 - 07:18:17 14728
Peachland 07:03:06 -19.8 Dark Up 8.3 208.8 Really Low 06:48:06 - 07:18:06 14727
Kelowna 07:03:03 -19.8 Dark Up 8.1 209.0 Really Low 06:48:03 - 07:18:03 14727
Summerland 07:03:03 -20.0 Dark Up 8.4 208.9 Really Low 06:48:03 - 07:18:03 14722
Penticton 07:03:02 -20.1 Dark Up 8.4 209.0 Really Low 06:48:02 - 07:18:02 14719
Oliver 07:03:01 -20.4 Dark Up 8.7 209.0 Really Low 06:48:01 - 07:18:01 14709
Anarchist Mountain Observatory 07:03:01 -20.6 Dark Up 8.8 209.2 Really Low 06:48:01 - 07:18:01 14703
Okanogan 07:03:01 -21.2 Dark Up 9.4 209.0 Really Low 06:48:01 - 07:18:01 14686
Brewster 07:02:59 -21.4 Dark Up 9.7 208.9 Really Low 06:47:59 - 07:17:59 14681
Manson/Chelan 07:03:00 -21.6 Dark Up 10.0 208.6 Really Low 06:48:00 - 07:18:00 14678
Wenatchee 07:03:00 -22.0 Dark Up 10.5 208.5 Really Low 06:48:00 - 07:18:00 14666
Ellensburg 07:02:59 -22.3 Dark Up 10.9 208.3 Really Low 06:47:59 - 07:17:59 14655
Yakima 07:02:57 -22.7 Dark Up 11.3 208.3 Really Low 06:47:57 - 07:17:57 14643
Toppenish/White Swan 07:02:56 -23.0 Dark Up 11.4 208.5 Really Low 06:47:56 - 07:17:56 14634
The Dalles 07:02:58 -23.5 Dark Up 12.4 207.9 Really Low 06:47:58 - 07:17:58 14616
PNWRO 07:02:51 -23.6 Dark Up 11.3 209.8 Really Low 06:47:51 - 07:17:51 14605
Maupin 07:02:56 -24.0 Dark Up 12.7 208.0 Really Low 06:47:56 - 07:17:56 14601
Sleaford 07:02:26 -18.9 Dark Down 1.5 219.9 Really Low 06:47:26 - 07:17:26 14600
Sisters 07:02:56 -24.7 Dark Up 13.7 207.7 Really Low 06:47:56 - 07:17:56 14575
Bend 07:02:54 -25.0 Dark Up 13.8 208.0 Really Low 06:47:54 - 07:17:54 14564
Oregon Observatory 07:02:54 -25.1 Dark Up 14.0 207.9 Really Low 06:47:54 - 07:17:54 14559
Chiloquin 07:02:52 -26.3 Dark Up 15.3 207.7 Really Low 06:47:52 - 07:17:52 14513
Klamath Falls 07:02:51 -26.6 Dark Up 15.6 207.8 Really Low 06:47:51 - 07:17:51 14499
Cedarville 07:02:44 -27.6 Dark Up 15.6 209.2 Really Low 06:47:44 - 07:17:44 14453
Fall River/Burney 07:02:48 -27.8 Dark Up 16.5 208.2 Really Low 06:47:48 - 07:17:48 14446
Greenville 07:02:43 -28.8 Dark Up 17.1 208.7 Really Low 06:47:43 - 07:17:43 14402
Gimple 07:02:45 -28.8 Dark Up 17.1 208.8 Really Low 06:47:45 - 07:17:45 14401
Quincy 07:02:43 -29.0 Dark Up 17.3 208.8 Really Low 06:47:43 - 07:17:43 14393
Portola 07:02:41 -29.2 Dark Up 17.2 209.2 Really Low 06:47:41 - 07:17:41 14383
Reno 07:02:36 -29.6 Dark Up 17.2 209.8 Really Low 06:47:36 - 07:17:36 14363
Carson City 07:02:35 -29.9 Dark Up 17.5 209.8 Really Low 06:47:35 - 07:17:35 14346
Gardnerville 07:02:34 -30.2 Dark Up 17.7 209.9 Really Low 06:47:34 - 07:17:34 14335
Yerington 07:02:32 -30.3 Dark Up 17.5 210.4 Really Low 06:47:32 - 07:17:32 14329
Hawthorne 07:02:28 -30.8 Dark Up 17.7 210.9 Really Low 06:47:28 - 07:17:28 14301
Lee Vining 07:02:29 -31.3 Dark Up 18.3 210.6 Really Low 06:47:29 - 07:17:29 14281
Bishop 07:02:24 -32.0 Dark Up 18.6 211.3 Really Low 06:47:24 - 07:17:24 14242
Beatty 07:02:15 -32.8 Dark Up 18.3 212.7 Really Low 06:47:15 - 07:17:15 14196
Dunrhomin 07:01:40 -30.7 Dark Up 10.2 221.1 Really Low 06:46:40 - 07:16:40 14151
Nikitin 07:01:41 -30.9 Dark Up 10.4 221.2 Really Low 06:46:41 - 07:16:41 14143
CU-SBO 07:01:39 -31.0 Dark Up 10.5 221.1 Really Low 06:46:39 - 07:16:39 14141
Wildwood 07:02:18 -35.1 Dark Up 21.5 211.7 Low 06:47:18 - 07:17:18 14075
Patrick 07:02:00 -34.7 Dark Up 18.2 215.3 Really Low 06:47:00 - 07:17:00 14074
Laughlin/Bullhead City 07:02:03 -34.9 Dark Up 18.8 214.7 Really Low 06:47:03 - 07:17:03 14072
Lake Havasu City 07:01:59 -35.6 Dark Up 19.2 215.1 Really Low 06:46:59 - 07:16:59 14031
Idyllwild 07:02:08 -35.8 Dark Up 20.9 213.3 Low 06:47:08 - 07:17:08 14029
Calipatria 07:02:03 -36.7 Dark Up 20.9 214.4 Low 06:47:03 - 07:17:03 13975
George/Scottsdale 07:01:46 -36.7 Dark Up 18.7 217.1 Really Low 06:46:46 - 07:16:46 13945
Yuma 07:01:56 -37.3 Dark Up 20.8 215.2 Low 06:46:56 - 07:16:56 13936

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 307251, (2023/07/28 07:05UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 10.81   6
23Tau Sco      16:35:52.9 -28:12:58  2.8  9.40   8
PPM 266626     17:16:12.6 -26:33:11  6.5  0.42  16
PPM 266648     17:17:39.5 -26:37:43  7.0  0.16  17
307251         17:17:46.6 -26:47:24 16.4        17
Positions are for J2000

Event circumstances last updated at 2023/07/28 03:51:34 UT

Marc W. Buie, Southwest Research Institute

RECON