RECON: TNO occultation with 5145

Event between (5145) Pholus and star GA0740:23691929 with event index number of 1493329

Geocentric closest approach at 2026/06/08 08:36:57 UTC

J2000 position of star is 18:48:11.7 -14:27:15
Equinox of date position of star is 18:49:34.1 -14:25:33
Stellar brightness G=15.4, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 65 degrees from the moon. Moon is 51% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 30.6 AU from the Sun and 29.7 AU from the Earth.
Apparent velocity is 23.3 km/sec on the sky relative to the star, or, 3.9 arcsec/hr.
The 1-sigma error in the time of the event is 134 seconds.
The 1-sigma cross-track error in the shadow position is 1477 km.
The sky-plane scale is 21515.8 km/arcsec.

The object has an absolute magnitude Hv=7.1
Diameter=229.1 km assuming a 5% albedo -- 10.0 sec chord
Diameter=93.5 km assuming a 30% albedo -- 4.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 5145, (2026/06/08 08:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:31:02.0 -26:29:18  0.9 34.51  97
Nunki          18:56:54.1 -26:15:41  2.0 11.96  65
PPM 235105     18:52:00.8 -13:32:23  6.5  1.05  65
PPM 235043     18:49:42.1 -14:40:38  7.1  0.25  65
PPM 235028     18:49:12.3 -14:29:31  9.3  0.14  65
5145           18:49:41.9 -14:25:23 15.4        65
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 19.5 km RECON observability=1.0 and success probability=22.1%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	08:36:46	-12.3	AT	Up	23.4	177.9	Low	08:25:04 - 08:48:28	1727
Kamloops	08:37:29	-16.0	AT	Up	23.3	162.8	Low	08:25:47 - 08:49:11	1690
Kelowna	08:37:27	-16.7	AT	Up	24.3	163.6	Low	08:25:45 - 08:49:09	1653
Peachland	08:37:28	-16.9	AT	Up	24.3	163.3	Low	08:25:46 - 08:49:10	1647
Summerland	08:37:28	-17.0	AT	Up	24.5	163.4	Low	08:25:46 - 08:49:10	1640
Penticton	08:37:28	-17.1	AT	Up	24.6	163.5	Low	08:25:46 - 08:49:10	1637
Oliver	08:37:28	-17.4	AT	Up	24.9	163.4	Low	08:25:46 - 08:49:10	1620
Anarchist Mountain Observatory	08:37:28	-17.6	AT	Up	25.1	163.6	Low	08:25:46 - 08:49:10	1612
Victoria	08:37:41	-18.4	Dark	Up	24.7	159.4	Low	08:25:59 - 08:49:23	1585
Okanogan	08:37:29	-18.2	Dark	Up	25.7	163.3	Low	08:25:47 - 08:49:11	1580
Brewster	08:37:30	-18.5	Dark	Up	25.9	163.1	Low	08:25:48 - 08:49:12	1566
Manson/Chelan	08:37:32	-18.7	Dark	Up	26.0	162.6	Low	08:25:50 - 08:49:14	1556
Wenatchee	08:37:33	-19.2	Dark	Up	26.4	162.4	Low	08:25:51 - 08:49:15	1531
Ellensburg	08:37:34	-19.7	Dark	Up	26.8	162.1	Low	08:25:52 - 08:49:16	1510
Yakima	08:37:34	-20.1	Dark	Up	27.2	162.0	Low	08:25:52 - 08:49:16	1488
Toppenish/White Swan	08:37:34	-20.3	Dark	Up	27.4	162.2	Low	08:25:52 - 08:49:16	1477
PNWRO	08:37:30	-20.5	Dark	Up	28.1	163.7	Low	08:25:48 - 08:49:12	1457
The Dalles	08:37:37	-21.1	Dark	Up	28.0	161.2	Low	08:25:55 - 08:49:19	1434
Maupin	08:37:38	-21.5	Dark	Up	28.4	161.2	Low	08:25:56 - 08:49:20	1412
Sisters	08:37:40	-22.4	Dark	Up	29.1	160.6	Low	08:25:58 - 08:49:22	1362
Bend	08:37:40	-22.6	Dark	Up	29.4	160.8	Low	08:25:58 - 08:49:22	1349
Oregon Observatory	08:37:40	-22.8	Dark	Up	29.6	160.6	Low	08:25:58 - 08:49:22	1339
Chiloquin	08:37:43	-24.2	Dark	Up	30.7	159.9	Up	08:26:01 - 08:49:25	1262
Klamath Falls	08:37:43	-24.5	Dark	Up	31.0	160.0	Up	08:26:01 - 08:49:25	1241
Cedarville	08:37:39	-25.0	Dark	Up	32.1	161.6	Up	08:25:57 - 08:49:21	1200
Fall River/Burney	08:37:43	-25.6	Dark	Up	32.2	160.1	Up	08:26:01 - 08:49:25	1169
Greenville	08:37:43	-26.5	Dark	Up	33.2	160.4	Up	08:26:01 - 08:49:25	1113
Gimple	08:37:43	-26.5	Dark	Up	33.2	160.5	Up	08:26:01 - 08:49:25	1112
Quincy	08:37:43	-26.7	Dark	Up	33.4	160.4	Up	08:26:01 - 08:49:25	1100
Portola	08:37:42	-26.7	Dark	Up	33.6	160.9	Up	08:26:00 - 08:49:24	1092
Dunrhomin	08:36:47	-23.0	Dark	Up	35.3	178.5	Up	08:25:05 - 08:48:29	1083
Reno	08:37:40	-26.9	Dark	Up	34.1	161.6	Up	08:25:58 - 08:49:22	1075
Nikitin	08:36:47	-23.1	Dark	Up	35.5	178.5	Up	08:25:05 - 08:48:29	1071
CU-SBO	08:36:47	-23.2	Dark	Up	35.5	178.4	Up	08:25:05 - 08:48:29	1068
Carson City	08:37:40	-27.3	Dark	Up	34.4	161.5	Up	08:25:58 - 08:49:22	1052
Yerington	08:37:38	-27.4	Dark	Up	34.7	162.2	Up	08:25:56 - 08:49:20	1039
Gardnerville	08:37:40	-27.5	Dark	Up	34.6	161.5	Up	08:25:58 - 08:49:22	1036
Hawthorne	08:37:36	-27.8	Dark	Up	35.3	162.7	Up	08:25:54 - 08:49:18	1009
Lee Vining	08:37:39	-28.4	Dark	Up	35.7	162.0	Up	08:25:57 - 08:49:21	972
Bishop	08:37:37	-28.9	Dark	Up	36.5	162.7	Up	08:25:55 - 08:49:19	931
Beatty	08:37:31	-29.0	Dark	Up	37.3	164.5	Up	08:25:49 - 08:49:13	898
Patrick	08:37:21	-29.9	Dark	Up	39.3	167.7	Up	08:25:39 - 08:49:03	789
Laughlin/Bullhead City	08:37:24	-30.3	Dark	Up	39.4	166.8	Up	08:25:42 - 08:49:06	773
Lake Havasu City	08:37:24	-30.8	Dark	Up	40.1	167.0	Up	08:25:42 - 08:49:06	724
Wildwood	08:37:40	-32.1	Dark	Up	39.5	161.7	Up	08:25:58 - 08:49:22	700
Idyllwild	08:37:33	-32.1	Dark	Up	40.3	163.9	Up	08:25:51 - 08:49:15	673
George/Scottsdale	08:37:10	-31.0	Dark	Up	41.3	169.9	Up	08:25:28 - 08:48:52	673
Calipatria	08:37:29	-32.4	Dark	Up	41.2	165.2	Up	08:25:47 - 08:49:11	626
Yuma	08:37:26	-32.6	Dark	Up	41.8	166.2	Up	08:25:44 - 08:49:08	592

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, (2026/06/08 08:37UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 34.51  97
Nunki          18:55:15.9 -26:17:49  2.0 11.96  65
PPM 235105     18:50:31.2 -13:34:20  6.5  1.05  65
PPM 235043     18:48:11.7 -14:42:31  7.1  0.25  65
PPM 235028     18:47:42.1 -14:31:22  9.3  0.14  65
5145           18:48:11.7 -14:27:15 15.4        65
Positions are for J2000

Event circumstances last updated at 2024/02/21 04:21:23 UT

RECON