RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:34708527 with event index number of 2276670

Geocentric closest approach at 2027/08/03 07:31:52 UTC

J2000 position of star is 18:10:50.7 -28:42:04
Equinox of date position of star is 18:12:17.8 -28:41:41
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 129 degrees from the moon. Moon is 1% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 32.5 AU from the Sun and 31.7 AU from the Earth.
The TNO is moving 16.7 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 175 seconds.
The 1-sigma cross-track error in the shadow position is 1400 km.
The sky-plane scale is 22960.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=346.7 km assuming a 5% albedo -- 17.9 sec chord
Diameter=141.6 km assuming a 30% albedo -- 7.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470593, (2027/08/03 07:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.2 -26:29:27  0.9 22.55 106
Nunki          18:56:58.4 -26:15:35  2.0 10.14 139
PPM 267912     18:09:49.8 -28:27:05  4.6  0.65 128
PPM 268033     18:13:43.4 -28:53:35  7.1  0.32 129
PPM 268015     18:13:10.5 -28:26:06  9.3  0.29 129
470593         18:12:35.7 -28:41:36 16.5       129
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 5.1 sigma about the mid-time.
The median site spacing is 0.0 km RECON observability=0.0 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 07:29:48 -21.3 Dark Down 6.0 207.0 Really Low 07:14:48 - 07:44:48 10927
Victoria 07:29:54 -23.0 Dark Down 8.8 204.6 Really Low 07:14:54 - 07:44:54 10919
Peachland 07:29:44 -22.3 Dark Down 6.7 207.6 Really Low 07:14:44 - 07:44:44 10890
Kelowna 07:29:42 -22.2 Dark Down 6.5 207.8 Really Low 07:14:42 - 07:44:42 10888
Summerland 07:29:43 -22.4 Dark Down 6.8 207.7 Really Low 07:14:43 - 07:44:43 10884
Penticton 07:29:43 -22.5 Dark Down 6.8 207.8 Really Low 07:14:43 - 07:44:43 10880
Oliver 07:29:41 -22.8 Dark Down 7.1 207.8 Really Low 07:14:41 - 07:44:41 10870
Anarchist Mountain Observatory 07:29:40 -23.0 Dark Down 7.2 207.9 Really Low 07:14:40 - 07:44:40 10862
Okanogan 07:29:40 -23.6 Dark Down 7.8 207.8 Really Low 07:14:40 - 07:44:40 10846
Manson/Chelan 07:29:41 -24.1 Dark Down 8.4 207.4 Really Low 07:14:41 - 07:44:41 10842
Brewster 07:29:39 -23.9 Dark Down 8.1 207.6 Really Low 07:14:39 - 07:44:39 10841
Wenatchee 07:29:40 -24.5 Dark Down 8.9 207.2 Really Low 07:14:40 - 07:44:40 10830
Ellensburg 07:29:40 -24.9 Dark Down 9.4 207.1 Really Low 07:14:40 - 07:44:40 10820
Yakima 07:29:40 -25.3 Dark Down 9.7 207.1 Really Low 07:14:40 - 07:44:40 10807
Toppenish/White Swan 07:29:38 -25.5 Dark Down 9.9 207.3 Really Low 07:14:38 - 07:44:38 10796
The Dalles 07:29:38 -26.2 Dark Down 10.8 206.7 Really Low 07:14:38 - 07:44:38 10784
Maupin 07:29:37 -26.6 Dark Down 11.2 206.8 Really Low 07:14:37 - 07:44:37 10768
PNWRO 07:29:31 -26.0 Dark Down 9.7 208.5 Really Low 07:14:31 - 07:44:31 10754
Sisters 07:29:37 -27.4 Dark Down 12.1 206.5 Really Low 07:14:37 - 07:44:37 10745
Bend 07:29:36 -27.7 Dark Down 12.2 206.7 Really Low 07:14:36 - 07:44:36 10731
Oregon Observatory 07:29:36 -27.8 Dark Down 12.4 206.6 Really Low 07:14:36 - 07:44:36 10727
Chiloquin 07:29:35 -29.0 Dark Down 13.7 206.4 Really Low 07:14:35 - 07:44:35 10684
Sleaford 07:29:07 -20.3 Dark Down 0.0 218.6 Really Low 07:14:07 - 07:44:07 10668
Klamath Falls 07:29:33 -29.4 Dark Down 14.0 206.5 Really Low 07:14:33 - 07:44:33 10668
Fall River/Burney 07:29:30 -30.6 Dark Down 15.0 206.9 Really Low 07:14:30 - 07:44:30 10611
Cedarville 07:29:26 -30.3 Dark Down 14.1 207.9 Really Low 07:14:26 - 07:44:26 10607
Greenville 07:29:26 -31.6 Dark Down 15.6 207.4 Really Low 07:14:26 - 07:44:26 10562
Gimple 07:29:27 -31.6 Dark Down 15.6 207.5 Really Low 07:14:27 - 07:44:27 10560
Quincy 07:29:26 -31.8 Dark Down 15.8 207.4 Really Low 07:14:26 - 07:44:26 10552
Portola 07:29:23 -31.9 Dark Down 15.7 207.8 Really Low 07:14:23 - 07:44:23 10537
Reno 07:29:20 -32.3 Dark Down 15.7 208.4 Really Low 07:14:20 - 07:44:20 10511
Carson City 07:29:19 -32.7 Dark Down 16.0 208.5 Really Low 07:14:19 - 07:44:19 10494
Gardnerville 07:29:18 -32.9 Dark Down 16.2 208.5 Really Low 07:14:18 - 07:44:18 10481
Yerington 07:29:16 -32.9 Dark Down 16.0 209.0 Really Low 07:14:16 - 07:44:16 10470
Hawthorne 07:29:13 -33.5 Dark Down 16.2 209.5 Really Low 07:14:13 - 07:44:13 10436
Lee Vining 07:29:14 -34.0 Dark Down 16.9 209.2 Really Low 07:14:14 - 07:44:14 10421
Bishop 07:29:10 -34.6 Dark Down 17.1 209.9 Really Low 07:14:10 - 07:44:10 10374
Beatty 07:29:02 -35.3 Dark Down 16.9 211.2 Really Low 07:14:02 - 07:44:02 10311
Wildwood 07:29:04 -37.8 Dark Down 20.0 210.2 Low 07:14:04 - 07:44:04 10205
Dunrhomin 07:28:25 -32.0 Dark Down 9.0 219.6 Really Low 07:13:25 - 07:43:25 10170
Laughlin/Bullhead City 07:28:48 -37.2 Dark Down 17.4 213.2 Really Low 07:13:48 - 07:43:48 10163
CU-SBO 07:28:24 -32.3 Dark Down 9.2 219.6 Really Low 07:13:24 - 07:43:24 10161
Patrick 07:28:46 -37.0 Dark Down 16.9 213.7 Really Low 07:13:46 - 07:43:46 10159
Idyllwild 07:28:55 -38.4 Dark Down 19.6 211.8 Really Low 07:13:55 - 07:43:55 10140
Lake Havasu City 07:28:46 -37.9 Dark Down 17.9 213.5 Really Low 07:13:46 - 07:43:46 10119
Calipatria 07:28:48 -39.1 Dark Down 19.6 212.8 Really Low 07:13:48 - 07:43:48 10073
Yuma 07:28:43 -39.6 Dark Down 19.5 213.6 Really Low 07:13:43 - 07:43:43 10024
George/Scottsdale 07:28:34 -38.7 Dark Down 17.4 215.5 Really Low 07:13:34 - 07:43:34 10008

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 470593, (2027/08/03 07:32UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.55 106
Nunki          18:55:15.9 -26:17:49  2.0 10.14 139
PPM 267912     18:08:05.0 -28:27:26  4.6  0.65 128
PPM 268033     18:11:58.2 -28:54:06  7.1  0.32 129
PPM 268015     18:11:25.7 -28:26:36  9.3  0.29 129
470593         18:10:50.7 -28:42:04 16.5       129
Positions are for J2000

Event circumstances last updated at 2022/11/22 03:22:20 UT

Marc W. Buie, Southwest Research Institute

RECON