RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star GA1200:12101395 with event index number of 2204007

Geocentric closest approach at 2025/04/15 09:35:02 UTC

J2000 position of star is 20:14:46.6 +30:59:49
Equinox of date position of star is 20:15:44.8 +31:04:19
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 90 degrees from the moon. Moon is 95% illuminated.
Apparent brightness V=21.8

[RECON map]
Object is 15.7 AU from the Sun and 15.9 AU from the Earth.
Apparent velocity is 17.8 km/sec on the sky relative to the star, or, 5.6 arcsec/hr.
The 1-sigma error in the time of the event is 92 seconds.
The 1-sigma cross-track error in the shadow position is 668 km.
The sky-plane scale is 11545.0 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=82.8 km assuming a 5% albedo -- 4.3 sec chord
Diameter=33.8 km assuming a 30% albedo -- 1.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2025/04/15 09:31UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:42:17.7 +45:22:18  1.3 15.20 101
53Eps Cyg      20:47:14.0 +34:03:57  2.5  7.27  97
39 Cyg         20:24:52.3 +32:16:23  4.4  2.27  92
PPM 084571     20:16:42.7 +30:49:14  8.3  0.32  90
PPM 084521     20:15:22.3 +30:58:36  9.1  0.13  90
342842         20:15:47.5 +31:04:31 15.9        90
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 11.8 km RECON observability=1.0 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)
Wildwood	09:36:31	-39.8	Dark	Up	28.7	70.2	Low	09:28:20 - 09:44:43	5250
Idyllwild	09:36:26	-39.2	Dark	Up	30.0	70.8	Up	09:28:14 - 09:44:37	5208
Calipatria	09:36:21	-39.1	Dark	Up	30.7	70.9	Up	09:28:09 - 09:44:32	5193
Yuma	09:36:14	-39.0	Dark	Up	31.3	71.0	Up	09:28:03 - 09:44:26	5180
Lake Havasu City	09:36:25	-37.4	Dark	Up	32.1	72.2	Up	09:28:13 - 09:44:36	5087
Bishop	09:36:48	-36.9	Dark	Up	30.0	72.1	Low	09:28:36 - 09:44:59	5081
Lee Vining	09:36:52	-36.7	Dark	Up	29.6	72.1	Low	09:28:41 - 09:45:04	5072
Laughlin/Bullhead City	09:36:28	-37.0	Dark	Up	32.2	72.5	Up	09:28:17 - 09:44:40	5065
Beatty	09:36:42	-36.6	Dark	Up	31.0	72.6	Up	09:28:30 - 09:44:53	5054
Gardnerville	09:36:59	-36.1	Dark	Up	29.5	72.3	Low	09:28:48 - 09:45:11	5035
Patrick	09:36:28	-36.4	Dark	Up	32.8	72.9	Up	09:28:17 - 09:44:40	5028
George/Scottsdale	09:36:14	-36.7	Dark	Up	33.8	72.7	Up	09:28:03 - 09:44:26	5028
Hawthorne	09:36:54	-36.0	Dark	Up	30.2	72.6	Up	09:28:43 - 09:45:06	5026
Carson City	09:37:02	-35.9	Dark	Up	29.5	72.4	Low	09:28:50 - 09:45:13	5023
Yerington	09:36:58	-35.8	Dark	Up	29.9	72.6	Low	09:28:47 - 09:45:10	5016
Quincy	09:37:07	-35.7	Dark	Up	28.9	72.2	Low	09:28:55 - 09:45:18	5010
Portola	09:37:05	-35.6	Dark	Up	29.2	72.4	Low	09:28:53 - 09:45:16	5005
Reno	09:37:02	-35.6	Dark	Up	29.6	72.6	Low	09:28:51 - 09:45:14	5003
Greenville	09:37:08	-35.5	Dark	Up	29.0	72.3	Low	09:28:56 - 09:45:19	4999
Gimple	09:37:07	-35.4	Dark	Up	29.0	72.4	Low	09:28:56 - 09:45:19	4997
Fall River/Burney	09:37:13	-34.8	Dark	Up	28.9	72.6	Low	09:29:02 - 09:45:25	4957
Cedarville	09:37:13	-34.0	Dark	Up	30.0	73.5	Low	09:29:01 - 09:45:24	4897
Klamath Falls	09:37:20	-33.9	Dark	Up	29.0	73.0	Low	09:29:08 - 09:45:31	4895
Chiloquin	09:37:22	-33.6	Dark	Up	29.1	73.2	Low	09:29:10 - 09:45:33	4876
Oregon Observatory	09:37:27	-32.3	Dark	Up	29.8	74.1	Low	09:29:16 - 09:45:39	4784
Bend	09:37:27	-32.1	Dark	Up	29.9	74.3	Low	09:29:16 - 09:45:39	4769
Sisters	09:37:29	-32.0	Dark	Up	29.8	74.3	Low	09:29:18 - 09:45:41	4760
Maupin	09:37:33	-31.0	Dark	Up	30.4	75.1	Up	09:29:21 - 09:45:44	4691
The Dalles	09:37:34	-30.7	Dark	Up	30.4	75.3	Up	09:29:23 - 09:45:46	4666
Toppenish/White Swan	09:37:37	-29.7	Dark	Up	31.1	76.2	Up	09:29:25 - 09:45:48	4596
Yakima	09:37:38	-29.6	Dark	Up	31.1	76.2	Up	09:29:26 - 09:45:49	4585
PNWRO	09:37:32	-29.6	Dark	Up	32.0	76.9	Up	09:29:20 - 09:45:43	4583
Ellensburg	09:37:40	-29.2	Dark	Up	31.2	76.5	Up	09:29:29 - 09:45:52	4558
Wenatchee	09:37:42	-28.8	Dark	Up	31.4	76.9	Up	09:29:30 - 09:45:53	4524
Victoria	09:37:52	-28.7	Dark	Up	29.7	75.5	Low	09:29:41 - 09:46:04	4512
Manson/Chelan	09:37:43	-28.3	Dark	Up	31.7	77.3	Up	09:29:32 - 09:45:55	4488
Brewster	09:37:44	-28.0	Dark	Up	31.9	77.6	Up	09:29:32 - 09:45:55	4465
CU-SBO	09:36:37	-28.5	Dark	Up	40.5	80.4	Up	09:28:25 - 09:44:48	4445
Okanogan	09:37:45	-27.7	Dark	Up	32.1	78.0	Up	09:29:33 - 09:45:56	4441
Nikitin	09:36:37	-28.4	Dark	Up	40.6	80.5	Up	09:28:26 - 09:44:49	4438
Dunrhomin	09:36:37	-28.2	Dark	Up	40.6	80.6	Up	09:28:26 - 09:44:49	4428
Anarchist Mountain Observatory	09:37:47	-27.1	Dark	Up	32.4	78.5	Up	09:29:36 - 09:45:59	4392
Oliver	09:37:49	-27.0	Dark	Up	32.3	78.5	Up	09:29:37 - 09:46:00	4384
Penticton	09:37:50	-26.7	Dark	Up	32.4	78.7	Up	09:29:39 - 09:46:02	4359
Summerland	09:37:51	-26.6	Dark	Up	32.3	78.7	Up	09:29:40 - 09:46:03	4357
Peachland	09:37:52	-26.5	Dark	Up	32.3	78.7	Up	09:29:40 - 09:46:03	4348
Kelowna	09:37:52	-26.3	Dark	Up	32.5	79.0	Up	09:29:40 - 09:46:03	4333
Kamloops	09:37:57	-25.9	Dark	Up	32.1	78.9	Up	09:29:45 - 09:46:08	4295
Sleaford	09:37:40	-19.7	Dark	Up	41.2	90.6	Up	09:29:28 - 09:45:51	3772

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, (2025/04/15 09:31UT)
Object            RA         Dec     mag  sep  mel
Deneb          20:41:25.9 +45:16:49  1.3 15.20 101
53Eps Cyg      20:46:13.3 +33:58:20  2.5  7.27  97
39 Cyg         20:23:51.7 +32:11:24  4.4  2.27  92
PPM 084571     20:15:41.6 +30:44:30  8.3  0.32  90
PPM 084521     20:14:21.4 +30:53:55  9.1  0.13  90
342842         20:14:46.6 +30:59:49 15.9        90
Positions are for J2000

Event circumstances last updated at 2024/03/02 06:11:09 UT

RECON