RECON: TNO occultation with 578835

Event between (578835) 14GL54 and star GA0840:05298230 with event index number of 2553159

Geocentric closest approach at 2025/07/09 05:02:20 UTC

J2000 position of star is 16:55:45.9 -05:39:29
Equinox of date position of star is 16:57:04.2 -05:41:43
Stellar brightness G=15.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 26 degrees from the moon. Moon is 97% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 37.1 AU from the Sun and 36.3 AU from the Earth.
Apparent velocity is 20.5 km/sec on the sky relative to the star, or, 2.8 arcsec/hr.
The 1-sigma error in the time of the event is 78 seconds.
The 1-sigma cross-track error in the shadow position is 1440 km.
The sky-plane scale is 26344.2 km/arcsec.

The object has an absolute magnitude Hv=6.2
Diameter=338.9 km assuming a 5% albedo -- 16.8 sec chord
Diameter=138.3 km assuming a 30% albedo -- 6.8 sec chord
Dynamical classification is SCATNEAR
 
 
 
 
 
 

Star training set for 578835, (2025/07/09 05:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:30:58.6 -26:29:11  0.9 21.70  18
13Zet Oph      16:38:34.0 -10:37:00  2.6  6.73  25
23 Oph         16:55:57.7 -06:11:37  5.3  0.58  26
PPM 200176     16:57:11.2 -06:09:45  7.6  0.47  26
PPM 200148     16:56:04.7 -05:45:00  9.0  0.27  26
578835         16:57:07.6 -05:41:49 15.6        26
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 26.5 km RECON observability=0.4 and success probability=0.5%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	05:01:58	-6.4	NT	Up	32.8	166.4	Up	04:54:58 - 05:08:58	3491
Kelowna	05:01:56	-7.4	NT	Up	33.7	167.4	Up	04:54:56 - 05:08:56	3431
Peachland	05:01:57	-7.4	NT	Up	33.8	167.0	Up	04:54:57 - 05:08:57	3429
Summerland	05:01:57	-7.5	NT	Up	34.0	167.1	Up	04:54:57 - 05:08:57	3419
Penticton	05:01:56	-7.6	NT	Up	34.0	167.2	Up	04:54:56 - 05:08:56	3414
Victoria	05:02:11	-6.7	NT	Up	34.4	162.5	Up	04:55:11 - 05:09:11	3413
Oliver	05:01:57	-7.9	NT	Up	34.4	167.2	Up	04:54:57 - 05:08:57	3393
Anarchist Mountain Observatory	05:01:56	-8.1	NT	Up	34.6	167.4	Up	04:54:56 - 05:08:56	3381
Okanogan	05:01:58	-8.5	NT	Up	35.2	167.0	Up	04:54:58 - 05:08:58	3345
Sleaford	05:01:10	-10.5	NT	Up	32.2	183.3	Up	04:54:10 - 05:08:10	3344
Brewster	05:02:00	-8.6	NT	Up	35.4	166.7	Up	04:55:00 - 05:09:00	3332
Manson/Chelan	05:02:01	-8.6	NT	Up	35.6	166.3	Up	04:55:01 - 05:09:01	3326
Wenatchee	05:02:02	-8.9	NT	Up	36.0	166.0	Up	04:55:02 - 05:09:02	3299
Ellensburg	05:02:04	-9.1	NT	Up	36.4	165.6	Up	04:55:04 - 05:09:04	3278
Yakima	05:02:05	-9.4	NT	Up	36.7	165.6	Up	04:55:05 - 05:09:05	3253
Toppenish/White Swan	05:02:04	-9.6	NT	Up	37.0	165.7	Up	04:55:04 - 05:09:04	3236
The Dalles	05:02:09	-9.8	NT	Up	37.6	164.6	Up	04:55:09 - 05:09:09	3200
PNWRO	05:02:00	-10.6	NT	Up	37.6	167.5	Up	04:55:00 - 05:09:00	3188
Maupin	05:02:09	-10.2	NT	Up	38.0	164.7	Up	04:55:09 - 05:09:09	3172
Sisters	05:02:12	-10.6	NT	Up	38.8	163.9	Up	04:55:12 - 05:09:12	3123
Bend	05:02:11	-10.9	NT	Up	39.1	164.1	Up	04:55:11 - 05:09:11	3103
Oregon Observatory	05:02:12	-10.9	NT	Up	39.2	163.9	Up	04:55:12 - 05:09:12	3094
Chiloquin	05:02:16	-11.7	NT	Up	40.4	163.1	Up	04:55:16 - 05:09:16	3013
Klamath Falls	05:02:16	-12.0	NT	Up	40.7	163.1	Up	04:55:16 - 05:09:16	2988
Cedarville	05:02:11	-13.3	AT	Up	41.7	165.0	Up	04:55:11 - 05:09:11	2912
Fall River/Burney	05:02:16	-13.0	AT	Up	41.9	163.3	Up	04:55:16 - 05:09:16	2899
Greenville	05:02:16	-13.9	AT	Up	42.9	163.7	Up	04:55:16 - 05:09:16	2827
Gimple	05:02:16	-13.9	AT	Up	42.9	163.8	Up	04:55:16 - 05:09:16	2825
Quincy	05:02:17	-14.0	AT	Up	43.1	163.6	Up	04:55:17 - 05:09:17	2812
Portola	05:02:15	-14.4	AT	Up	43.3	164.2	Up	04:55:15 - 05:09:15	2795
Reno	05:02:13	-14.9	AT	Up	43.7	165.0	Up	04:55:13 - 05:09:13	2764
Carson City	05:02:13	-15.2	AT	Up	44.1	165.0	Up	04:55:13 - 05:09:13	2737
Gardnerville	05:02:14	-15.4	AT	Up	44.3	165.0	Up	04:55:14 - 05:09:14	2718
Yerington	05:02:11	-15.7	AT	Up	44.4	165.8	Up	04:55:11 - 05:09:11	2711
Hawthorne	05:02:09	-16.3	AT	Up	44.9	166.4	Up	04:55:09 - 05:09:09	2666
Lee Vining	05:02:12	-16.4	AT	Up	45.4	165.6	Up	04:55:12 - 05:09:12	2634
Bishop	05:02:11	-17.3	AT	Up	46.1	166.4	Up	04:55:11 - 05:09:11	2574
Dunrhomin	05:01:14	-21.0	Dark	Up	44.0	185.0	Up	04:54:14 - 05:08:14	2531
Nikitin	05:01:14	-21.2	Dark	Up	44.2	185.0	Up	04:54:14 - 05:08:14	2518
CU-SBO	05:01:14	-21.2	Dark	Up	44.2	184.9	Up	04:54:14 - 05:08:14	2514
Beatty	05:02:04	-18.5	Dark	Up	46.8	168.6	Up	04:55:04 - 05:09:04	2507
Patrick	05:01:54	-21.1	Dark	Up	48.7	172.6	Up	04:54:54 - 05:08:54	2332
Laughlin/Bullhead City	05:01:58	-20.9	Dark	Up	48.8	171.5	Up	04:54:58 - 05:08:58	2326
Wildwood	05:02:16	-19.6	Dark	Up	49.2	165.3	Up	04:55:16 - 05:09:16	2322
Lake Havasu City	05:01:57	-21.6	Dark	Up	49.5	171.7	Up	04:54:57 - 05:08:57	2267
Idyllwild	05:02:09	-20.9	Dark	Up	49.9	168.0	Up	04:55:09 - 05:09:09	2255
Calipatria	05:02:04	-22.0	Dark	Up	50.7	169.7	Up	04:55:04 - 05:09:04	2180
George/Scottsdale	05:01:47	-23.4	Dark	Up	50.5	175.4	Up	04:54:47 - 05:08:47	2152
Yuma	05:02:00	-22.8	Dark	Up	51.3	171.0	Up	04:55:00 - 05:09:00	2126

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 578835, (2025/07/09 05:00UT)
Object            RA         Dec     mag  sep  mel
Antares        16:29:24.4 -26:25:56  0.9 21.70  18
13Zet Oph      16:37:09.6 -10:34:01  2.6  6.73  25
23 Oph         16:54:35.6 -06:09:15  5.3  0.58  26
PPM 200176     16:55:49.2 -06:07:25  7.6  0.47  26
PPM 200148     16:54:42.9 -05:42:37  9.0  0.27  26
578835         16:55:45.9 -05:39:29 15.6        26
Positions are for J2000

Event circumstances last updated at 2024/06/13 03:58:12 UT

RECON