RECON: TNO occultation with 470593

Event between (470593) 08LP17 and star GA0600:39511681 with event index number of 2278028

Geocentric closest approach at 2028/07/17 06:44:19 UTC

J2000 position of star is 18:23:21.0 -29:10:23
Equinox of date position of star is 18:24:48.5 -29:09:35
Stellar brightness G=15.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 138 degrees from the moon. Moon is 27% illuminated.
TNO apparent brightness V=21.7

[RECON map]
TNO is 32.8 AU from the Sun and 31.9 AU from the Earth.
The TNO is moving 21.3 km/sec on the sky relative to the star, or, 3.3 arcsec/hr.
The 1-sigma error in the time of the event is 163 seconds.
The 1-sigma cross-track error in the shadow position is 1435 km.
The sky-plane scale is 23106.1 km/arcsec.

The TNO has an absolute magnitude Hv=6.5
Diameter=346.7 km assuming a 5% albedo -- 14.0 sec chord
Diameter=141.6 km assuming a 30% albedo -- 5.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 470593, (2028/07/17 06:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:09.7 -26:29:34  0.9 25.28 163
Nunki          18:57:02.0 -26:15:31  2.0  7.62 131
PPM 268436     18:29:38.9 -29:47:49  6.0  1.17 137
PPM 268372     18:26:19.2 -29:45:47  8.5  0.66 138
PPM 268331     18:24:50.7 -28:59:36  9.2  0.18 138
470593         18:25:10.0 -29:09:23 15.2       138
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 14.7 km RECON observability=0.4 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 06:43:59 -15.9 AT Down 10.2 180.4 Really Low 06:29:54 - 06:58:05 9398
Kelowna 06:43:57 -16.9 AT Down 11.0 181.2 Really Low 06:29:52 - 06:58:03 9377
Peachland 06:43:58 -16.9 AT Down 11.1 180.9 Really Low 06:29:52 - 06:58:03 9376
Summerland 06:43:58 -17.1 AT Down 11.2 181.0 Really Low 06:29:52 - 06:58:03 9372
Penticton 06:43:57 -17.1 AT Down 11.3 181.1 Really Low 06:29:52 - 06:58:03 9370
Oliver 06:43:58 -17.5 AT Down 11.6 181.1 Really Low 06:29:53 - 06:58:04 9362
Victoria 06:44:11 -17.2 AT Down 12.3 177.7 Really Low 06:30:05 - 06:58:16 9362
Anarchist Mountain Observatory 06:43:57 -17.7 AT Down 11.8 181.3 Really Low 06:29:52 - 06:58:03 9358
Okanogan 06:43:58 -18.2 Dark Down 12.5 181.1 Really Low 06:29:53 - 06:58:04 9343
Brewster 06:43:58 -18.5 Dark Down 12.7 180.9 Really Low 06:29:52 - 06:58:03 9338
Manson/Chelan 06:43:59 -18.6 Dark Down 12.9 180.6 Really Low 06:29:54 - 06:58:05 9334
Wenatchee 06:44:00 -19.0 Dark Down 13.4 180.4 Really Low 06:29:55 - 06:58:06 9323
Ellensburg 06:44:02 -19.3 Dark Down 13.8 180.2 Really Low 06:29:56 - 06:58:07 9314
Sleaford 06:43:16 -16.6 AT Up 7.7 192.9 Really Low 06:29:10 - 06:57:21 9303
Yakima 06:44:01 -19.7 Dark Down 14.2 180.2 Really Low 06:29:55 - 06:58:06 9303
Toppenish/White Swan 06:44:01 -19.9 Dark Down 14.5 180.4 Really Low 06:29:55 - 06:58:06 9296
PNWRO 06:43:55 -20.6 Dark Down 14.8 181.7 Really Low 06:29:49 - 06:58:00 9278
The Dalles 06:44:03 -20.4 Dark Down 15.2 179.6 Really Low 06:29:58 - 06:58:09 9277
Maupin 06:44:03 -20.9 Dark Down 15.6 179.7 Really Low 06:29:57 - 06:58:08 9264
Sisters 06:44:05 -21.6 Dark Down 16.5 179.3 Really Low 06:29:59 - 06:58:10 9240
Bend 06:44:05 -21.8 Dark Down 16.8 179.5 Really Low 06:29:59 - 06:58:10 9232
Oregon Observatory 06:44:04 -22.0 Dark Down 16.9 179.4 Really Low 06:29:59 - 06:58:10 9227
Chiloquin 06:44:07 -23.1 Dark Down 18.3 179.0 Really Low 06:30:01 - 06:58:12 9184
Klamath Falls 06:44:07 -23.4 Dark Down 18.6 179.1 Really Low 06:30:01 - 06:58:12 9172
Cedarville 06:44:00 -24.5 Dark Down 19.3 180.6 Really Low 06:29:55 - 06:58:06 9140
Fall River/Burney 06:44:05 -24.6 Dark Down 19.8 179.4 Really Low 06:29:59 - 06:58:10 9127
Greenville 06:44:03 -25.6 Dark Down 20.7 179.9 Low 06:29:58 - 06:58:09 9091
Gimple 06:44:03 -25.6 Dark Down 20.7 179.9 Low 06:29:57 - 06:58:08 9090
Quincy 06:44:03 -25.8 Dark Down 20.9 179.9 Low 06:29:58 - 06:58:09 9083
Portola 06:44:01 -26.0 Dark Down 21.0 180.3 Low 06:29:56 - 06:58:07 9076
Reno 06:43:59 -26.4 Dark Down 21.3 180.9 Low 06:29:53 - 06:58:04 9061
Carson City 06:43:59 -26.8 Dark Down 21.6 180.9 Low 06:29:53 - 06:58:04 9047
Gardnerville 06:43:58 -27.0 Dark Down 21.9 181.0 Low 06:29:53 - 06:58:04 9036
Yerington 06:43:57 -27.1 Dark Down 21.8 181.5 Low 06:29:51 - 06:58:02 9035
Hawthorne 06:43:54 -27.7 Dark Down 22.3 182.0 Low 06:29:49 - 06:58:00 9012
Lee Vining 06:43:56 -28.1 Dark Down 22.8 181.6 Low 06:29:51 - 06:58:02 8992
Bishop 06:43:53 -28.9 Dark Down 23.4 182.2 Low 06:29:48 - 06:57:59 8960
Dunrhomin 06:43:03 -28.4 Dark Down 19.1 194.2 Really Low 06:28:58 - 06:57:09 8933
Beatty 06:43:46 -29.7 Dark Down 23.8 183.8 Low 06:29:41 - 06:57:52 8927
CU-SBO 06:43:04 -28.6 Dark Down 19.4 194.1 Really Low 06:28:58 - 06:57:09 8924
Patrick 06:43:35 -31.8 Dark Down 25.1 186.6 Low 06:29:29 - 06:57:40 8830
Laughlin/Bullhead City 06:43:37 -31.9 Dark Down 25.4 185.9 Low 06:29:32 - 06:57:43 8825
Wildwood 06:43:54 -31.9 Dark Down 26.7 182.1 Low 06:29:48 - 06:57:59 8807
Lake Havasu City 06:43:37 -32.6 Dark Down 26.0 186.2 Low 06:29:32 - 06:57:43 8789
Idyllwild 06:43:46 -32.7 Dark Down 27.0 183.9 Low 06:29:41 - 06:57:52 8775
Calipatria 06:43:41 -33.6 Dark Down 27.5 185.1 Low 06:29:36 - 06:57:47 8731
George/Scottsdale 06:43:26 -33.9 Dark Down 26.6 188.6 Low 06:29:21 - 06:57:32 8723
Yuma 06:43:38 -34.3 Dark Down 27.9 186.0 Low 06:29:33 - 06:57:44 8700
Nikitin 06:45:19 28.1 Sun up Up -30.4 269.8 Not Up 06:31:13 - 06:59:24 8466

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, (2028/07/17 06:45UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 25.28 163
Nunki          18:55:15.9 -26:17:49  2.0  7.62 131
PPM 268436     18:27:49.5 -29:49:00  6.0  1.17 137
PPM 268372     18:24:29.8 -29:46:50  8.5  0.66 138
PPM 268331     18:23:01.9 -29:00:35  9.2  0.18 138
470593         18:23:21.0 -29:10:23 15.2       138
Positions are for J2000

Event circumstances last updated at 2022/12/04 03:41:25 UT

Marc W. Buie, Southwest Research Institute

RECON