RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star GA1180:09313683 with event index number of 2204439

Geocentric closest approach at 2025/09/30 04:52:30 UTC

J2000 position of star is 19:41:39.7 +29:11:30
Equinox of date position of star is 19:42:37.7 +29:14:59
Stellar brightness G=14.0, use SENSEUP=64 with the MallinCam and and exposure time of 1 seconds with the QHY174 camera.
Star is 59 degrees from the moon. Moon is 52% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 15.9 AU from the Sun and 15.5 AU from the Earth.
Apparent velocity is 29.9 km/sec on the sky relative to the star, or, 9.6 arcsec/hr.
The 1-sigma error in the time of the event is 58 seconds.
The 1-sigma cross-track error in the shadow position is 723 km.
The sky-plane scale is 11262.0 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=82.8 km assuming a 5% albedo -- 2.6 sec chord
Diameter=33.8 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2025/09/30 04:55UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:48.6 +38:48:31  0.0 16.45  67
37Gam Cyg      20:23:09.2 +40:20:25  2.2 13.83  72
PPM 109352     19:38:11.2 +29:23:35  6.1  0.99  59
PPM 109509     19:42:21.7 +29:12:22  8.5  0.09  59
342842         19:42:41.5 +29:15:13 14.0        59
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 25.0 km RECON observability=1.0 and success probability=39.8%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Victoria	04:51:02	-28.6	Dark	Up	63.8	230.9	Up	04:45:42 - 04:56:23	-162
Kamloops	04:50:53	-29.0	Dark	Up	60.9	232.3	Up	04:45:32 - 04:56:13	-210
Peachland	04:50:55	-29.9	Dark	Up	61.2	234.5	Up	04:45:34 - 04:56:15	-303
Kelowna	04:50:54	-30.0	Dark	Up	60.9	234.8	Up	04:45:33 - 04:56:14	-313
Summerland	04:50:55	-30.0	Dark	Up	61.2	234.9	Up	04:45:35 - 04:56:16	-318
Penticton	04:50:55	-30.1	Dark	Up	61.2	235.2	Up	04:45:35 - 04:56:16	-329
Oliver	04:50:56	-30.3	Dark	Up	61.4	235.7	Up	04:45:36 - 04:56:17	-352
Anarchist Mountain Observatory	04:50:56	-30.6	Dark	Up	61.4	236.2	Up	04:45:36 - 04:56:17	-374
Manson/Chelan	04:51:00	-30.8	Dark	Up	62.4	236.9	Up	04:45:40 - 04:56:21	-399
Okanogan	04:50:59	-30.8	Dark	Up	61.8	236.9	Up	04:45:38 - 04:56:19	-403
Brewster	04:51:00	-30.9	Dark	Up	62.1	237.1	Up	04:45:39 - 04:56:20	-408
Wenatchee	04:51:02	-31.0	Dark	Up	62.8	237.4	Up	04:45:42 - 04:56:23	-419
Ellensburg	04:51:04	-31.1	Dark	Up	63.1	237.8	Up	04:45:43 - 04:56:24	-431
Yakima	04:51:05	-31.3	Dark	Up	63.3	238.4	Up	04:45:44 - 04:56:25	-456
The Dalles	04:51:08	-31.5	Dark	Up	64.2	239.3	Up	04:45:48 - 04:56:29	-478
Toppenish/White Swan	04:51:05	-31.5	Dark	Up	63.3	239.1	Up	04:45:45 - 04:56:26	-480
Maupin	04:51:10	-31.8	Dark	Up	64.3	240.2	Up	04:45:49 - 04:56:30	-511
Sisters	04:51:13	-32.0	Dark	Up	65.1	241.1	Up	04:45:52 - 04:56:33	-533
Bend	04:51:13	-32.2	Dark	Up	65.0	242.0	Up	04:45:52 - 04:56:33	-564
Oregon Observatory	04:51:14	-32.3	Dark	Up	65.2	242.1	Up	04:45:53 - 04:56:34	-566
PNWRO	04:51:04	-32.6	Dark	Up	62.6	241.8	Up	04:45:44 - 04:56:25	-595
Chiloquin	04:51:18	-32.7	Dark	Up	66.0	244.1	Up	04:45:58 - 04:56:39	-617
Klamath Falls	04:51:19	-32.9	Dark	Up	66.1	245.0	Up	04:45:59 - 04:56:40	-643
Fall River/Burney	04:51:23	-33.8	Dark	Up	66.3	247.9	Up	04:46:02 - 04:56:43	-739
Cedarville	04:51:19	-34.3	Dark	Up	65.3	248.5	Up	04:45:59 - 04:56:40	-793
Greenville	04:51:25	-34.5	Dark	Up	66.3	250.5	Up	04:46:04 - 04:56:45	-824
Gimple	04:51:25	-34.6	Dark	Up	66.3	250.6	Up	04:46:04 - 04:56:45	-829
Quincy	04:51:25	-34.6	Dark	Up	66.4	250.9	Up	04:46:05 - 04:56:46	-836
Sleaford	04:50:33	-34.5	Dark	Down	52.4	248.4	Up	04:45:12 - 04:55:53	-840
Portola	04:51:25	-35.0	Dark	Up	66.1	251.7	Up	04:46:04 - 04:56:45	-876
Reno	04:51:25	-35.6	Dark	Up	65.7	253.1	Up	04:46:05 - 04:56:46	-937
Carson City	04:51:26	-35.8	Dark	Up	65.8	253.9	Up	04:46:06 - 04:56:47	-960
Gardnerville	04:51:27	-35.9	Dark	Up	65.8	254.4	Up	04:46:06 - 04:56:47	-978
Yerington	04:51:26	-36.3	Dark	Up	65.3	255.0	Up	04:46:06 - 04:56:47	-1015
Hawthorne	04:51:26	-36.9	Dark	Up	65.1	256.5	Up	04:46:06 - 04:56:47	-1080
Lee Vining	04:51:29	-36.9	Dark	Up	65.6	257.2	Up	04:46:08 - 04:56:49	-1080
Bishop	04:51:30	-37.7	Dark	Up	65.1	259.2	Up	04:46:10 - 04:56:51	-1166
Beatty	04:51:29	-39.0	Dark	Up	63.9	261.6	Up	04:46:08 - 04:56:49	-1307
Wildwood	04:51:41	-39.2	Dark	Up	65.7	266.1	Up	04:46:20 - 04:57:01	-1345
Idyllwild	04:51:39	-40.7	Dark	Up	64.1	268.1	Up	04:46:18 - 04:56:59	-1502
Laughlin/Bullhead City	04:51:31	-41.4	Dark	Up	62.3	266.6	Up	04:46:10 - 04:56:51	-1562
Patrick	04:51:30	-41.8	Dark	Up	61.7	266.6	Up	04:46:09 - 04:56:50	-1595
Calipatria	04:51:38	-41.9	Dark	Up	63.1	270.0	Up	04:46:18 - 04:56:59	-1621
Lake Havasu City	04:51:33	-42.0	Dark	Up	62.1	268.1	Up	04:46:13 - 04:56:54	-1621
Yuma	04:51:38	-42.7	Dark	Up	62.4	271.3	Up	04:46:18 - 04:56:59	-1710
Dunrhomin	04:51:02	-43.9	Dark	Up	54.6	264.9	Up	04:45:42 - 04:56:23	-1791
Nikitin	04:51:03	-44.0	Dark	Up	54.6	265.2	Up	04:45:43 - 04:56:24	-1803
CU-SBO	04:51:03	-44.0	Dark	Up	54.7	265.2	Up	04:45:43 - 04:56:24	-1803
George/Scottsdale	04:51:32	-44.1	Dark	Up	60.1	270.9	Up	04:46:11 - 04:56:52	-1836

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 342842, (2025/09/30 04:55UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 16.45  67
37Gam Cyg      20:22:13.7 +40:15:24  2.2 13.83  72
PPM 109352     19:37:09.6 +29:20:02  6.1  0.99  59
PPM 109509     19:41:19.9 +29:08:40  8.5  0.09  59
342842         19:41:39.7 +29:11:30 14.0        59
Positions are for J2000

Event circumstances last updated at 2024/03/03 05:55:23 UT

RECON