RECON: TNO occultation with 5145

Event between (5145) Pholus and star GA0760:15084899 with event index number of 1314658

Geocentric closest approach at 2024/06/29 06:32:59 UTC

J2000 position of star is 18:34:07.7 -13:31:24
Equinox of date position of star is 18:35:30.6 -13:30:10
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 94 degrees from the moon. Moon is 46% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 30.1 AU from the Sun and 29.1 AU from the Earth.
Apparent velocity is 26.0 km/sec on the sky relative to the star, or, 4.4 arcsec/hr.
The 1-sigma error in the time of the event is 106 seconds.
The 1-sigma cross-track error in the shadow position is 1399 km.
The sky-plane scale is 21070.6 km/arcsec.

The object has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 8.9 sec chord
Diameter=93.5 km assuming a 30% albedo -- 3.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 5145, (2024/06/29 06:33UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:54.8 -26:29:03  0.9 31.90 123
Nunki          18:56:46.9 -26:15:51  2.0 13.70  90
PPM 234707     18:35:03.0 -14:50:00  6.1  1.34  94
PPM 234736     18:36:10.2 -13:24:50  8.4  0.18  94
PPM 234725     18:35:41.9 -13:27:53  8.8  0.06  94
5145           18:35:30.8 -13:30:10 16.9        94
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 21.0 km RECON observability=0.8 and success probability=7.7%
Site Site mid-time
(UT)
Sun alt
(deg)
Sky Moon Star alt
(deg)
Star az
(deg)
Target Observing Time
(UT)
X-track
(km)
Sleaford 06:32:57 -14.3 AT Down 24.0 171.1 Low 06:23:37 - 06:42:17 2838
Kamloops 06:33:35 -13.4 AT Down 22.8 156.0 Low 06:24:15 - 06:42:55 2821
Kelowna 06:33:27 -14.4 AT Down 23.8 156.8 Low 06:24:07 - 06:42:47 2788
Peachland 06:33:35 -14.4 AT Down 23.8 156.5 Low 06:24:15 - 06:42:55 2777
Summerland 06:33:35 -14.6 AT Down 24.0 156.5 Low 06:24:15 - 06:42:55 2770
Penticton 06:33:35 -14.7 AT Down 24.1 156.6 Low 06:24:15 - 06:42:55 2766
Oliver 06:33:36 -15.0 AT Down 24.4 156.6 Low 06:24:16 - 06:42:56 2749
Anarchist Mountain Observatory 06:33:35 -15.2 AT Down 24.6 156.8 Low 06:24:15 - 06:42:55 2741
Victoria 06:33:46 -14.6 AT Down 23.9 152.6 Low 06:24:26 - 06:43:06 2719
Okanogan 06:33:36 -15.8 AT Down 25.1 156.4 Low 06:24:16 - 06:42:56 2709
Brewster 06:33:38 -16.0 AT Down 25.3 156.2 Low 06:24:18 - 06:42:58 2696
Manson/Chelan 06:33:38 -16.1 AT Down 25.4 155.7 Low 06:24:18 - 06:42:58 2686
Wenatchee 06:33:40 -16.5 AT Down 25.8 155.5 Low 06:24:20 - 06:43:00 2661
Ellensburg 06:33:41 -16.8 AT Down 26.1 155.2 Low 06:24:21 - 06:43:01 2640
Yakima 06:33:42 -17.2 AT Down 26.5 155.1 Low 06:24:22 - 06:43:02 2619
Toppenish/White Swan 06:33:42 -17.4 AT Down 26.7 155.2 Low 06:24:22 - 06:43:02 2607
PNWRO 06:33:38 -18.1 Dark Down 27.5 156.7 Low 06:24:18 - 06:42:58 2586
The Dalles 06:33:45 -17.9 AT Down 27.2 154.2 Low 06:24:25 - 06:43:05 2566
Maupin 06:33:46 -18.3 Dark Down 27.6 154.2 Low 06:24:26 - 06:43:06 2543
Sisters 06:33:48 -19.0 Dark Down 28.2 153.5 Low 06:24:28 - 06:43:08 2495
Bend 06:33:48 -19.3 Dark Down 28.5 153.7 Low 06:24:28 - 06:43:08 2481
Oregon Observatory 06:33:48 -19.4 Dark Down 28.7 153.6 Low 06:24:28 - 06:43:08 2471
Chiloquin 06:33:51 -20.5 Dark Down 29.7 152.8 Low 06:24:31 - 06:43:11 2394
Klamath Falls 06:33:52 -20.9 Dark Down 30.0 152.8 Up 06:24:32 - 06:43:12 2374
Cedarville 06:33:48 -22.0 Dark Down 31.2 154.3 Up 06:24:28 - 06:43:08 2330
Fall River/Burney 06:33:52 -22.1 Dark Down 31.2 152.9 Up 06:24:32 - 06:43:12 2301
Greenville 06:33:52 -23.0 Dark Down 32.2 153.1 Up 06:24:32 - 06:43:12 2244
Gimple 06:33:52 -23.1 Dark Down 32.2 153.2 Up 06:24:32 - 06:43:12 2244
Quincy 06:33:52 -23.2 Dark Down 32.4 153.1 Up 06:24:32 - 06:43:12 2231
Portola 06:33:51 -23.5 Dark Down 32.6 153.5 Up 06:24:31 - 06:43:11 2223
Reno 06:33:49 -23.9 Dark Down 33.1 154.2 Up 06:24:29 - 06:43:09 2205
Dunrhomin 06:33:03 -26.1 Dark Down 35.8 170.9 Up 06:23:43 - 06:42:23 2189
Carson City 06:33:50 -24.2 Dark Down 33.4 154.1 Up 06:24:30 - 06:43:10 2182
Nikitin 06:33:03 -26.3 Dark Down 35.9 170.8 Up 06:23:43 - 06:42:23 2177
CU-SBO 06:33:03 -26.4 Dark Down 36.0 170.7 Up 06:23:43 - 06:42:23 2174
Yerington 06:33:48 -24.6 Dark Down 33.8 154.7 Up 06:24:28 - 06:43:08 2168
Gardnerville 06:33:50 -24.5 Dark Down 33.7 154.1 Up 06:24:30 - 06:43:10 2166
Hawthorne 06:33:47 -25.2 Dark Down 34.4 155.2 Up 06:24:27 - 06:43:07 2136
Lee Vining 06:33:50 -25.6 Dark Down 34.8 154.5 Up 06:24:30 - 06:43:10 2100
Bishop 06:33:48 -26.3 Dark Down 35.5 155.1 Up 06:24:28 - 06:43:08 2058
Beatty 06:33:43 -27.2 Dark Down 36.5 156.8 Up 06:24:23 - 06:43:03 2022
Patrick 06:33:35 -29.4 Dark Down 38.7 159.7 Up 06:24:15 - 06:42:55 1908
Laughlin/Bullhead City 06:33:38 -29.4 Dark Down 38.8 158.8 Up 06:24:18 - 06:42:58 1893
Lake Havasu City 06:33:38 -30.1 Dark Down 39.5 158.9 Up 06:24:18 - 06:42:58 1844
Wildwood 06:33:52 -29.3 Dark Down 38.4 153.8 Up 06:24:32 - 06:43:12 1828
Idyllwild 06:33:47 -30.2 Dark Down 39.4 155.9 Up 06:24:27 - 06:43:07 1798
George/Scottsdale 06:33:27 -31.5 Dark Down 40.9 161.6 Up 06:24:07 - 06:42:47 1779
Calipatria 06:33:43 -31.1 Dark Down 40.4 157.1 Up 06:24:23 - 06:43:03 1748
Yuma 06:33:41 -31.8 Dark Down 41.0 158.0 Up 06:24:21 - 06:43:01 1712

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, (2024/06/29 06:33UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 31.90 123
Nunki          18:55:15.9 -26:17:49  2.0 13.70  90
PPM 234707     18:33:39.1 -14:51:14  6.1  1.34  94
PPM 234736     18:34:47.2 -13:26:05  8.4  0.18  94
PPM 234725     18:34:18.8 -13:29:08  8.8  0.06  94
5145           18:34:07.7 -13:31:24 16.9        94
Positions are for J2000

Event circumstances last updated at 2024/06/11 03:47:12 UT

Marc W. Buie, Southwest Research Institute

RECON