RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:35468008 with event index number of 2276525

Geocentric closest approach at 2027/07/13 08:49:38 UTC

J2000 position of star is 18:12:47.3 -28:41:16
Equinox of date position of star is 18:14:14.4 -28:40:49
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 41 degrees from the moon. Moon is 76% 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 21.6 km/sec on the sky relative to the star, or, 3.4 arcsec/hr.
The 1-sigma error in the time of the event is 140 seconds.
The 1-sigma cross-track error in the shadow position is 1327 km.
The sky-plane scale is 22826.6 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=346.7 km assuming a 5% albedo -- 13.8 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470593, (2027/07/13 08:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:06.0 -26:29:26  0.9 22.98  18
Nunki          18:56:58.2 -26:15:36  2.0  9.71  50
PPM 267912     18:09:49.6 -28:27:05  4.6  1.06  40
PPM 268033     18:13:43.1 -28:53:35  7.1  0.28  41
PPM 268066     18:14:58.1 -28:50:43  9.2  0.19  41
470593         18:14:32.0 -28:40:43 16.4        41
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 70.3 km RECON observability=0.1 and success probability=1.9%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 08:47:52 -16.9 AT Down 6.5 205.7 Really Low 08:35:40 - 09:00:04 3174
Victoria 08:47:57 -19.4 Dark Down 9.3 203.3 Really Low 08:35:45 - 09:00:09 3170
Peachland 08:47:49 -17.8 AT Down 7.2 206.2 Really Low 08:35:37 - 09:00:01 3135
Kelowna 08:47:48 -17.6 AT Down 7.0 206.5 Really Low 08:35:36 - 09:00:00 3132
Summerland 08:47:48 -17.9 AT Down 7.3 206.3 Really Low 08:35:36 - 09:00:00 3129
Penticton 08:47:48 -18.0 AT Down 7.3 206.4 Really Low 08:35:36 - 09:00:00 3125
Oliver 08:47:47 -18.3 Dark Down 7.6 206.4 Really Low 08:35:35 - 08:59:59 3114
Anarchist Mountain Observatory 08:47:47 -18.5 Dark Down 7.7 206.6 Really Low 08:35:35 - 08:59:59 3105
Okanogan 08:47:46 -19.1 Dark Down 8.3 206.5 Really Low 08:35:34 - 08:59:58 3089
Manson/Chelan 08:47:46 -19.7 Dark Down 8.9 206.0 Really Low 08:35:34 - 08:59:58 3085
Brewster 08:47:46 -19.4 Dark Down 8.6 206.3 Really Low 08:35:34 - 08:59:58 3084
Wenatchee 08:47:46 -20.2 Dark Down 9.4 205.9 Really Low 08:35:34 - 08:59:58 3073
Ellensburg 08:47:46 -20.6 Dark Down 9.9 205.8 Really Low 08:35:34 - 08:59:58 3063
Yakima 08:47:46 -21.0 Dark Down 10.2 205.8 Really Low 08:35:34 - 08:59:58 3050
Toppenish/White Swan 08:47:45 -21.2 Dark Down 10.4 205.9 Really Low 08:35:33 - 08:59:57 3038
The Dalles 08:47:46 -22.0 Dark Down 11.3 205.3 Really Low 08:35:34 - 08:59:58 3027
Maupin 08:47:45 -22.4 Dark Down 11.7 205.5 Really Low 08:35:33 - 08:59:57 3010
PNWRO 08:47:39 -21.4 Dark Down 10.2 207.2 Really Low 08:35:27 - 08:59:51 2992
Sisters 08:47:45 -23.4 Dark Down 12.6 205.1 Really Low 08:35:33 - 08:59:57 2987
Bend 08:47:44 -23.6 Dark Down 12.7 205.4 Really Low 08:35:32 - 08:59:56 2972
Oregon Observatory 08:47:45 -23.8 Dark Down 12.9 205.3 Really Low 08:35:33 - 08:59:57 2969
Chiloquin 08:47:43 -25.1 Dark Down 14.3 205.0 Really Low 08:35:31 - 08:59:55 2924
Klamath Falls 08:47:43 -25.4 Dark Down 14.5 205.1 Really Low 08:35:31 - 08:59:55 2908
Sleaford 08:47:19 -13.0 AT Down 0.6 217.3 Really Low 08:35:07 - 08:59:31 2891
Fall River/Burney 08:47:40 -26.6 Dark Down 15.5 205.6 Really Low 08:35:28 - 08:59:52 2849
Cedarville 08:47:36 -25.9 Dark Down 14.7 206.6 Really Low 08:35:24 - 08:59:48 2842
Greenville 08:47:37 -27.4 Dark Down 16.2 206.1 Really Low 08:35:25 - 08:59:49 2798
Gimple 08:47:36 -27.4 Dark Down 16.1 206.1 Really Low 08:35:24 - 08:59:48 2795
Quincy 08:47:36 -27.6 Dark Down 16.3 206.1 Really Low 08:35:24 - 08:59:48 2788
Portola 08:47:35 -27.7 Dark Down 16.3 206.5 Really Low 08:35:23 - 08:59:47 2771
Reno 08:47:32 -27.8 Dark Down 16.3 207.1 Really Low 08:35:20 - 08:59:44 2743
Carson City 08:47:31 -28.2 Dark Down 16.6 207.2 Really Low 08:35:19 - 08:59:43 2726
Gardnerville 08:47:31 -28.4 Dark Down 16.8 207.2 Really Low 08:35:19 - 08:59:43 2713
Yerington 08:47:29 -28.3 Dark Down 16.6 207.7 Really Low 08:35:17 - 08:59:41 2701
Hawthorne 08:47:27 -28.6 Dark Down 16.8 208.2 Really Low 08:35:15 - 08:59:39 2665
Lee Vining 08:47:28 -29.3 Dark Down 17.5 207.9 Really Low 08:35:16 - 08:59:40 2650
Bishop 08:47:24 -29.7 Dark Down 17.7 208.6 Really Low 08:35:12 - 08:59:36 2600
Beatty 08:47:18 -29.9 Dark Down 17.5 210.0 Really Low 08:35:06 - 08:59:30 2533
Wildwood 08:47:21 -33.0 Dark Down 20.7 208.9 Low 08:35:09 - 08:59:33 2429
Laughlin/Bullhead City 08:47:08 -31.1 Dark Down 18.1 212.0 Really Low 08:34:56 - 08:59:20 2378
Patrick 08:47:06 -30.7 Dark Down 17.6 212.5 Really Low 08:34:54 - 08:59:18 2372
Dunrhomin 08:46:48 -23.7 Dark Down 9.7 218.5 Really Low 08:34:36 - 08:59:00 2370
CU-SBO 08:46:48 -23.9 Dark Down 9.9 218.4 Really Low 08:34:36 - 08:59:00 2360
Idyllwild 08:47:13 -32.9 Dark Down 20.2 210.5 Low 08:35:01 - 08:59:25 2358
Lake Havasu City 08:47:06 -31.7 Dark Down 18.6 212.3 Really Low 08:34:54 - 08:59:18 2333
Calipatria 08:47:09 -33.3 Dark Down 20.3 211.6 Low 08:34:57 - 08:59:21 2288
Yuma 08:47:04 -33.4 Dark Down 20.2 212.4 Low 08:34:52 - 08:59:16 2236
George/Scottsdale 08:46:57 -31.7 Dark Down 18.1 214.4 Really Low 08:34:45 - 08:59:09 2214

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, (2027/07/13 08:50UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 22.98  18
Nunki          18:55:15.9 -26:17:49  2.0  9.71  50
PPM 267912     18:08:05.0 -28:27:26  4.6  1.06  40
PPM 268033     18:11:58.2 -28:54:06  7.1  0.28  41
PPM 268066     18:13:13.2 -28:51:17  9.2  0.19  41
470593         18:12:47.3 -28:41:16 16.4        41
Positions are for J2000

Event circumstances last updated at 2022/11/22 02:46:53 UT

Marc W. Buie, Southwest Research Institute

RECON