RECON: TNO occultation with 555756

Event between (555756) 14DH143 and star GA0840:04286059 with event index number of 2471941

Geocentric closest approach at 2025/06/11 06:15:41 UTC

J2000 position of star is 13:28:24.0 -04:20:46
Equinox of date position of star is 13:29:39.7 -04:28:16
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 59 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=22.7

[RECON map]
Object is 38.0 AU from the Sun and 37.5 AU from the Earth.
Apparent velocity is 11.1 km/sec on the sky relative to the star, or, 1.5 arcsec/hr.
The 1-sigma error in the time of the event is 265 seconds.
The 1-sigma cross-track error in the shadow position is 1707 km.
The sky-plane scale is 27176.2 km/arcsec.

The object has an absolute magnitude Hv=6.8
Diameter=259.4 km assuming a 5% albedo -- 23.4 sec chord
Diameter=105.9 km assuming a 30% albedo -- 9.6 sec chord
Dynamical classification is 4:3E
 
 
 
 
 
 

Star training set for 555756, (2025/06/11 06:12UT)
Object            RA         Dec     mag  sep  mel
Spica          13:26:32.2 -11:17:36  1.0  6.86  56
66 Vir         13:25:52.8 -05:17:46  6.1  1.26  59
PPM 196506     13:27:27.7 -03:47:34  7.4  0.89  59
PPM 196548     13:30:01.6 -04:35:48  8.6  0.14  58
555756         13:29:43.2 -04:28:38 16.6        58
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 3.4 sigma about the mid-time.
The median site spacing is 25.2 km RECON observability=0.8 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)
Sleaford	06:13:09	-14.0	AT	Up	21.9	229.6	Low	05:58:09 - 06:28:09	11451
Kamloops	06:14:06	-12.5	AT	Up	28.9	215.8	Low	05:59:06 - 06:29:06	11266
Kelowna	06:14:01	-13.5	AT	Up	29.2	217.0	Low	05:59:01 - 06:29:01	11229
Peachland	06:14:03	-13.5	AT	Up	29.4	216.7	Low	05:59:03 - 06:29:03	11220
Summerland	06:14:01	-13.7	AT	Up	29.5	216.9	Low	05:59:01 - 06:29:01	11213
Penticton	06:14:00	-13.8	AT	Up	29.5	217.0	Low	05:59:00 - 06:29:00	11210
Oliver	06:13:59	-14.1	AT	Up	29.8	217.1	Low	05:58:59 - 06:28:59	11190
Anarchist Mountain Observatory	06:13:57	-14.3	AT	Up	29.9	217.4	Low	05:58:57 - 06:28:57	11183
Okanogan	06:13:56	-14.8	AT	Up	30.5	217.4	Up	05:58:56 - 06:28:56	11143
Brewster	06:13:54	-15.0	AT	Up	30.8	217.3	Up	05:58:54 - 06:28:54	11125
Victoria	06:14:17	-13.6	AT	Up	31.8	213.3	Up	05:59:17 - 06:29:17	11113
Manson/Chelan	06:13:55	-15.1	AT	Up	31.1	216.9	Up	05:58:55 - 06:28:55	11109
Wenatchee	06:13:52	-15.5	AT	Up	31.6	216.9	Up	05:58:52 - 06:28:52	11079
Ellensburg	06:13:54	-15.8	AT	Up	32.0	216.8	Up	05:58:54 - 06:28:54	11052
Yakima	06:13:51	-16.1	AT	Up	32.3	217.0	Up	05:58:51 - 06:28:51	11027
Toppenish/White Swan	06:13:49	-16.4	AT	Up	32.4	217.2	Up	05:58:49 - 06:28:49	11015
PNWRO	06:13:38	-17.1	AT	Up	32.1	218.9	Up	05:58:38 - 06:28:38	11008
The Dalles	06:13:51	-16.8	AT	Up	33.4	216.7	Up	05:58:51 - 06:28:51	10959
Maupin	06:13:48	-17.2	AT	Up	33.7	216.9	Up	05:58:48 - 06:28:48	10934
Sisters	06:13:47	-17.9	AT	Up	34.6	216.8	Up	05:58:47 - 06:28:47	10872
Bend	06:13:43	-18.2	Dark	Up	34.7	217.1	Up	05:58:43 - 06:28:43	10860
Oregon Observatory	06:13:44	-18.3	Dark	Up	34.9	217.1	Up	05:58:44 - 06:28:44	10847
Chiloquin	06:13:41	-19.3	Dark	Up	36.1	217.2	Up	05:58:41 - 06:28:41	10754
Dunrhomin	06:11:53	-25.6	Dark	Up	28.9	234.4	Low	05:56:53 - 06:26:53	10753
Nikitin	06:11:52	-25.8	Dark	Up	29.1	234.5	Low	05:56:52 - 06:26:52	10740
CU-SBO	06:11:53	-25.9	Dark	Up	29.2	234.5	Low	05:56:53 - 06:26:53	10735
Klamath Falls	06:13:38	-19.6	Dark	Up	36.3	217.4	Up	05:58:38 - 06:28:38	10732
Cedarville	06:13:24	-20.8	Dark	Up	36.2	219.4	Up	05:58:24 - 06:28:24	10702
Fall River/Burney	06:13:29	-20.8	Dark	Up	37.1	218.3	Up	05:58:29 - 06:28:29	10655
Gimple	06:13:22	-21.8	Dark	Up	37.6	219.3	Up	05:58:22 - 06:28:22	10597
Greenville	06:13:24	-21.8	Dark	Up	37.6	219.2	Up	05:58:24 - 06:28:24	10596
Quincy	06:13:22	-21.9	Dark	Up	37.8	219.3	Up	05:58:22 - 06:28:22	10582
Portola	06:13:17	-22.2	Dark	Up	37.6	219.9	Up	05:58:17 - 06:28:17	10578
Reno	06:13:14	-22.7	Dark	Up	37.5	220.7	Up	05:58:14 - 06:28:14	10567
Carson City	06:13:10	-23.0	Dark	Up	37.8	220.9	Up	05:58:10 - 06:28:10	10541
Yerington	06:13:07	-23.4	Dark	Up	37.6	221.7	Up	05:58:07 - 06:28:07	10534
Gardnerville	06:13:10	-23.2	Dark	Up	38.0	221.1	Up	05:58:10 - 06:28:10	10524
Hawthorne	06:13:01	-24.0	Dark	Up	37.7	222.4	Up	05:58:01 - 06:28:01	10506
Lee Vining	06:13:02	-24.3	Dark	Up	38.4	222.2	Up	05:58:02 - 06:28:02	10459
Bishop	06:12:56	-25.1	Dark	Up	38.4	223.3	Up	05:57:56 - 06:27:56	10423
Beatty	06:12:56	-26.1	Dark	Up	37.9	225.3	Up	05:57:56 - 06:27:56	10407
Patrick	06:12:56	-28.3	Dark	Up	37.2	229.0	Up	05:57:56 - 06:27:56	10333
Laughlin/Bullhead City	06:12:56	-28.3	Dark	Up	37.8	228.5	Up	05:57:56 - 06:27:56	10305
Lake Havasu City	06:12:56	-29.0	Dark	Up	38.0	229.1	Up	05:57:56 - 06:27:56	10258
George/Scottsdale	06:11:55	-30.4	Dark	Up	37.1	231.7	Up	05:56:55 - 06:26:55	10212
Wildwood	06:12:56	-28.0	Dark	Up	40.9	225.0	Up	05:57:56 - 06:27:56	10169
Idyllwild	06:12:56	-29.0	Dark	Up	40.0	227.2	Up	05:57:56 - 06:27:56	10167
Calipatria	06:12:56	-29.9	Dark	Up	39.7	228.7	Up	05:57:56 - 06:27:56	10136
Yuma	06:12:08	-30.5	Dark	Up	39.5	229.7	Up	05:57:08 - 06:27:08	10101

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 555756, (2025/06/11 06:12UT)
Object            RA         Dec     mag  sep  mel
Spica          13:25:11.5 -11:09:41  1.0  6.86  56
66 Vir         13:24:33.5 -05:09:51  6.1  1.26  59
PPM 196506     13:26:08.7 -03:39:40  7.4  0.89  59
PPM 196548     13:28:42.3 -04:27:56  8.6  0.14  58
555756         13:28:24.0 -04:20:46 16.6        59
Positions are for J2000

Event circumstances last updated at 2024/04/18 03:40:23 UT

RECON