RECON: TNO occultation with 5145

Event between (5145) Pholus and star GA0760:14436925 with event index number of 1401846

Geocentric closest approach at 2024/07/17 07:47:01 UTC

J2000 position of star is 18:31:59.1 -13:35:51
Equinox of date position of star is 18:33:22.1 -13:34:41
Stellar brightness G=16.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 37 degrees from the moon. Moon is 81% illuminated.
Apparent brightness V=21.9

[RECON map]
Object is 30.1 AU from the Sun and 29.1 AU from the Earth.
Apparent velocity is 24.8 km/sec on the sky relative to the star, or, 4.2 arcsec/hr.
The 1-sigma error in the time of the event is 110 seconds.
The 1-sigma cross-track error in the shadow position is 1394 km.
The sky-plane scale is 21111.9 km/arcsec.

The object has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 9.4 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 5145, (2024/07/17 07:47UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:55.0 -26:29:03  0.9 31.41   6
Nunki          18:56:47.1 -26:15:50  2.0 13.82  39
PPM 234686     18:34:07.4 -14:50:45  5.1  1.28  37
PPM 234665     18:33:21.3 -13:59:15  8.2  0.41  37
PPM 234642     18:32:39.0 -13:47:05  9.4  0.27  37
5145           18:33:22.5 -13:34:41 16.4        37
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 19.0 km RECON observability=1.0 and success probability=23.0%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Kamloops 07:45:44 -18.1 Dark Up 24.6 194.7 Low 07:36:02 - 07:55:26 -717
Kelowna 07:45:41 -18.9 Dark Up 25.3 195.7 Low 07:35:59 - 07:55:23 -774
Peachland 07:45:42 -19.0 Dark Up 25.4 195.4 Low 07:36:00 - 07:55:24 -775
Victoria 07:45:52 -20.0 Dark Up 27.2 191.7 Low 07:36:10 - 07:55:34 -783
Summerland 07:45:42 -19.2 Dark Up 25.5 195.5 Low 07:36:00 - 07:55:24 -784
Penticton 07:45:41 -19.3 Dark Up 25.6 195.7 Low 07:35:59 - 07:55:23 -790
Oliver 07:45:41 -19.6 Dark Up 25.9 195.7 Low 07:35:59 - 07:55:23 -809
Anarchist Mountain Observatory 07:45:40 -19.8 Dark Up 26.1 195.9 Low 07:35:58 - 07:55:22 -821
Okanogan 07:45:41 -20.4 Dark Up 26.7 195.8 Low 07:35:59 - 07:55:23 -853
Brewster 07:45:42 -20.7 Dark Up 27.0 195.6 Low 07:36:00 - 07:55:24 -865
Manson/Chelan 07:45:42 -20.9 Dark Up 27.3 195.2 Low 07:36:00 - 07:55:24 -871
Sleaford 07:45:09 -16.4 AT Down 20.0 209.0 Really Low 07:35:27 - 07:54:51 -884
Wenatchee 07:45:43 -21.3 Dark Up 27.8 195.1 Low 07:36:01 - 07:55:25 -895
Ellensburg 07:45:43 -21.7 Dark Up 28.2 194.9 Low 07:36:01 - 07:55:25 -915
Yakima 07:45:43 -22.1 Dark Up 28.6 195.0 Low 07:36:01 - 07:55:25 -938
Toppenish/White Swan 07:45:42 -22.4 Dark Up 28.8 195.2 Low 07:36:00 - 07:55:24 -953
The Dalles 07:45:44 -23.1 Dark Up 29.7 194.4 Low 07:36:02 - 07:55:26 -986
PNWRO 07:45:38 -22.8 Dark Up 28.9 196.9 Low 07:35:56 - 07:55:20 -1001
Maupin 07:45:44 -23.5 Dark Up 30.1 194.6 Up 07:36:02 - 07:55:26 -1013
Sisters 07:45:45 -24.3 Dark Up 31.0 194.2 Up 07:36:03 - 07:55:27 -1057
Bend 07:45:45 -24.6 Dark Up 31.2 194.5 Up 07:36:03 - 07:55:27 -1076
Oregon Observatory 07:45:45 -24.7 Dark Up 31.4 194.4 Up 07:36:03 - 07:55:27 -1085
Chiloquin 07:45:46 -26.0 Dark Up 32.7 194.1 Up 07:36:04 - 07:55:28 -1160
Klamath Falls 07:45:46 -26.4 Dark Up 33.0 194.3 Up 07:36:04 - 07:55:28 -1184
Cedarville 07:45:40 -27.2 Dark Up 33.4 196.2 Up 07:35:58 - 07:55:22 -1258
Fall River/Burney 07:45:44 -27.6 Dark Up 34.1 194.9 Up 07:36:02 - 07:55:26 -1268
Greenville 07:45:42 -28.5 Dark Up 34.9 195.6 Up 07:36:00 - 07:55:24 -1337
Gimple 07:45:42 -28.5 Dark Up 34.9 195.7 Up 07:36:00 - 07:55:24 -1339
Quincy 07:45:42 -28.7 Dark Up 35.1 195.6 Up 07:36:00 - 07:55:24 -1351
Portola 07:45:41 -28.9 Dark Up 35.1 196.2 Up 07:35:59 - 07:55:23 -1368
Reno 07:45:39 -29.2 Dark Up 35.2 197.0 Up 07:35:57 - 07:55:21 -1399
Carson City 07:45:38 -29.5 Dark Up 35.6 197.1 Up 07:35:56 - 07:55:20 -1424
Gardnerville 07:45:38 -29.8 Dark Up 35.8 197.2 Up 07:35:56 - 07:55:20 -1442
Yerington 07:45:37 -29.8 Dark Up 35.6 197.9 Up 07:35:55 - 07:55:19 -1450
Hawthorne 07:45:35 -30.3 Dark Up 35.9 198.6 Up 07:35:53 - 07:55:17 -1493
Lee Vining 07:45:36 -30.8 Dark Up 36.6 198.1 Up 07:35:54 - 07:55:18 -1523
Bishop 07:45:34 -31.5 Dark Up 37.0 199.1 Up 07:35:52 - 07:55:16 -1581
Beatty 07:45:28 -32.0 Dark Up 37.0 201.1 Up 07:35:46 - 07:55:10 -1648
Dunrhomin 07:44:54 -28.0 Dark Up 29.9 212.6 Low 07:35:12 - 07:54:36 -1652
Nikitin 07:44:54 -28.2 Dark Up 30.1 212.6 Up 07:35:12 - 07:54:36 -1665
CU-SBO 07:44:54 -28.3 Dark Up 30.2 212.6 Up 07:35:12 - 07:54:36 -1668
Patrick 07:45:18 -33.5 Dark Up 37.4 204.9 Up 07:35:36 - 07:55:00 -1821
Wildwood 07:45:34 -34.7 Dark Up 40.1 199.8 Up 07:35:52 - 07:55:16 -1822
Laughlin/Bullhead City 07:45:20 -33.7 Dark Up 37.9 204.1 Up 07:35:38 - 07:55:02 -1825
Lake Havasu City 07:45:19 -34.4 Dark Up 38.4 204.6 Up 07:35:37 - 07:55:01 -1882
Idyllwild 07:45:27 -35.1 Dark Up 39.9 202.1 Up 07:35:45 - 07:55:09 -1889
Calipatria 07:45:23 -35.8 Dark Up 40.1 203.7 Up 07:35:41 - 07:55:05 -1963
George/Scottsdale 07:45:11 -35.1 Dark Up 38.2 207.7 Up 07:35:29 - 07:54:53 -1998
Yuma 07:45:20 -36.2 Dark Up 40.2 204.9 Up 07:35:38 - 07:55:02 -2017

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 5145, (2024/07/17 07:47UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 31.41   6
Nunki          18:55:15.9 -26:17:49  2.0 13.82  39
PPM 234686     18:32:43.3 -14:51:57  5.1  1.28  37
PPM 234665     18:31:57.8 -14:00:25  8.2  0.41  37
PPM 234642     18:31:15.6 -13:48:13  9.4  0.27  37
5145           18:31:59.1 -13:35:51 16.4        37
Positions are for J2000

Event circumstances last updated at 2024/06/11 03:48:37 UT

Marc W. Buie, Southwest Research Institute

RECON