RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:35235322 with event index number of 2276573

Geocentric closest approach at 2027/07/19 08:06:36 UTC

J2000 position of star is 18:12:11.1 -28:41:38
Equinox of date position of star is 18:13:38.2 -28:41:12
Stellar brightness G=16.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 32 degrees from the moon. Moon is 100% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 32.4 AU from the Sun and 31.5 AU from the Earth.
The TNO is moving 20.5 km/sec on the sky relative to the star, or, 3.2 arcsec/hr.
The 1-sigma error in the time of the event is 146 seconds.
The 1-sigma cross-track error in the shadow position is 1350 km.
The sky-plane scale is 22856.4 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=346.7 km assuming a 5% albedo -- 14.5 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470593, (2027/07/19 08:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.1 -26:29:26  0.9 22.85  54
Nunki          18:56:58.3 -26:15:36  2.0  9.85  22
PPM 267912     18:09:49.7 -28:27:05  4.6  0.93  32
PPM 268033     18:13:43.2 -28:53:35  7.1  0.21  32
470593         18:13:56.0 -28:41:06 16.8        31
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 37.5 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 08:05:04 -18.5 Dark Up 7.7 201.8 Really Low 07:52:24 - 08:17:44 8000
Victoria 08:05:10 -20.5 Dark Up 10.4 199.3 Really Low 07:52:30 - 08:17:50 7990
Peachland 08:05:00 -19.4 Dark Up 8.4 202.3 Really Low 07:52:20 - 08:17:40 7965
Kelowna 08:05:00 -19.3 Dark Up 8.2 202.5 Really Low 07:52:20 - 08:17:40 7963
Summerland 08:04:59 -19.5 Dark Up 8.5 202.4 Really Low 07:52:19 - 08:17:39 7959
Penticton 08:04:59 -19.6 Dark Up 8.5 202.5 Really Low 07:52:19 - 08:17:39 7955
Oliver 08:04:59 -20.0 Dark Up 8.9 202.5 Really Low 07:52:19 - 08:17:39 7945
Anarchist Mountain Observatory 08:04:57 -20.1 Dark Up 9.0 202.7 Really Low 07:52:17 - 08:17:37 7938
Okanogan 08:04:57 -20.8 Dark Up 9.6 202.5 Really Low 07:52:17 - 08:17:37 7922
Manson/Chelan 08:04:59 -21.3 Dark Up 10.2 202.1 Really Low 07:52:19 - 08:17:39 7917
Brewster 08:04:57 -21.0 Dark Up 9.9 202.4 Really Low 07:52:17 - 08:17:37 7917
Wenatchee 08:04:58 -21.7 Dark Up 10.7 202.0 Really Low 07:52:18 - 08:17:38 7906
Ellensburg 08:04:58 -22.1 Dark Up 11.1 201.8 Really Low 07:52:18 - 08:17:38 7897
Yakima 08:04:58 -22.5 Dark Up 11.5 201.8 Really Low 07:52:18 - 08:17:38 7883
Toppenish/White Swan 08:04:57 -22.8 Dark Up 11.7 202.0 Really Low 07:52:17 - 08:17:37 7873
The Dalles 08:04:59 -23.5 Dark Up 12.6 201.4 Really Low 07:52:19 - 08:17:39 7861
Maupin 08:04:57 -24.0 Dark Up 13.0 201.5 Really Low 07:52:17 - 08:17:37 7845
PNWRO 08:04:51 -23.1 Dark Up 11.6 203.3 Really Low 07:52:11 - 08:17:31 7833
Sisters 08:04:57 -24.8 Dark Up 13.9 201.1 Really Low 07:52:17 - 08:17:37 7822
Bend 08:04:57 -25.1 Dark Up 14.1 201.4 Really Low 07:52:17 - 08:17:37 7809
Oregon Observatory 08:04:57 -25.2 Dark Up 14.3 201.3 Really Low 07:52:17 - 08:17:37 7805
Chiloquin 08:04:57 -26.5 Dark Up 15.6 201.0 Really Low 07:52:17 - 08:17:37 7762
Sleaford 08:04:26 -16.1 AT Up 2.3 213.6 Really Low 07:51:46 - 08:17:06 7754
Klamath Falls 08:04:55 -26.9 Dark Up 15.9 201.1 Really Low 07:52:15 - 08:17:35 7747
Fall River/Burney 08:04:53 -28.1 Dark Up 16.9 201.6 Really Low 07:52:13 - 08:17:33 7690
Cedarville 08:04:49 -27.6 Dark Up 16.1 202.6 Really Low 07:52:09 - 08:17:29 7688
Greenville 08:04:50 -29.0 Dark Up 17.6 202.1 Really Low 07:52:10 - 08:17:30 7643
Gimple 08:04:50 -29.0 Dark Up 17.6 202.2 Really Low 07:52:10 - 08:17:30 7641
Quincy 08:04:50 -29.2 Dark Up 17.8 202.1 Really Low 07:52:10 - 08:17:30 7634
Portola 08:04:48 -29.3 Dark Up 17.8 202.5 Really Low 07:52:08 - 08:17:28 7619
Reno 08:04:45 -29.6 Dark Up 17.8 203.1 Really Low 07:52:05 - 08:17:25 7594
Carson City 08:04:45 -30.0 Dark Up 18.2 203.2 Really Low 07:52:05 - 08:17:25 7577
Gardnerville 08:04:44 -30.2 Dark Up 18.4 203.3 Really Low 07:52:04 - 08:17:24 7565
Yerington 08:04:42 -30.1 Dark Up 18.1 203.7 Really Low 07:52:02 - 08:17:22 7555
Hawthorne 08:04:40 -30.6 Dark Up 18.4 204.3 Really Low 07:52:00 - 08:17:20 7522
Lee Vining 08:04:40 -31.2 Dark Up 19.1 203.9 Really Low 07:52:00 - 08:17:20 7506
Bishop 08:04:37 -31.8 Dark Up 19.4 204.6 Really Low 07:51:57 - 08:17:17 7460
Beatty 08:04:30 -32.2 Dark Up 19.3 206.1 Really Low 07:51:50 - 08:17:10 7400
Wildwood 08:04:34 -35.0 Dark Up 22.4 204.9 Low 07:51:54 - 08:17:14 7294
Dunrhomin 08:03:56 -27.5 Dark Up 11.8 214.9 Really Low 07:51:16 - 08:16:36 7269
CU-SBO 08:03:57 -27.7 Dark Up 12.1 214.9 Really Low 07:51:17 - 08:16:37 7259
Laughlin/Bullhead City 08:04:20 -33.8 Dark Up 20.0 208.2 Low 07:51:40 - 08:17:00 7256
Patrick 08:04:18 -33.5 Dark Up 19.5 208.7 Really Low 07:51:38 - 08:16:58 7252
Idyllwild 08:04:26 -35.3 Dark Up 22.1 206.6 Low 07:51:46 - 08:17:06 7231
Lake Havasu City 08:04:17 -34.4 Dark Up 20.5 208.5 Low 07:51:37 - 08:16:57 7213
Calipatria 08:04:21 -35.9 Dark Up 22.2 207.7 Low 07:51:41 - 08:17:01 7166
Yuma 08:04:17 -36.2 Dark Up 22.2 208.6 Low 07:51:37 - 08:16:57 7118
George/Scottsdale 08:04:07 -34.9 Dark Up 20.2 210.6 Low 07:51:27 - 08:16:47 7105

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, (2027/07/19 08:07UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.85  54
Nunki          18:55:15.9 -26:17:49  2.0  9.85  22
PPM 267912     18:08:05.0 -28:27:26  4.6  0.93  32
PPM 268033     18:11:58.2 -28:54:06  7.1  0.21  32
470593         18:12:11.1 -28:41:38 16.8        31
Positions are for J2000

Event circumstances last updated at 2022/11/22 02:58:44 UT

Marc W. Buie, Southwest Research Institute

RECON