RECON: TNO occultation with 342842

Event between (342842) 08YB3 and star GA1240:06879740 with event index number of 2203402

Geocentric closest approach at 2024/09/17 03:25:47 UTC

J2000 position of star is 19:44:23.4 +34:34:56
Equinox of date position of star is 19:45:17.7 +34:38:30
Stellar brightness G=16.6, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 63 degrees from the moon. Moon is 99% illuminated.
Apparent brightness V=21.7

[RECON map]
Object is 15.5 AU from the Sun and 15.1 AU from the Earth.
Apparent velocity is 32.2 km/sec on the sky relative to the star, or, 10.6 arcsec/hr.
The 1-sigma error in the time of the event is 44 seconds.
The 1-sigma cross-track error in the shadow position is 821 km.
The sky-plane scale is 10924.6 km/arcsec.

The object has an absolute magnitude Hv=9.5
Diameter=82.8 km assuming a 5% albedo -- 2.4 sec chord
Diameter=33.8 km assuming a 30% albedo -- 1.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 342842, (2024/09/17 03:28UT)
Object            RA         Dec     mag  sep  mel
Vega           18:37:46.5 +38:48:28  0.0 14.14  77
37Gam Cyg      20:23:07.0 +40:20:13  2.2  9.41  61
PPM 083442     19:44:47.3 +34:13:24  5.9  0.43  63
PPM 083465     19:45:33.9 +34:28:30  7.7  0.18  63
PPM 083474     19:46:00.6 +34:36:54  9.3  0.15  63
342842         19:45:18.9 +34:38:34 16.6        63
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 29.4 km RECON observability=0.5 and success probability=8.2%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Victoria	03:25:16	-11.0	NT	Up	73.6	144.0	Up	03:21:08 - 03:29:24	2886
Kamloops	03:25:06	-12.2	AT	Up	72.7	155.4	Up	03:20:58 - 03:29:14	2757
Peachland	03:25:09	-12.9	AT	Up	73.7	155.8	Up	03:21:01 - 03:29:17	2683
Summerland	03:25:09	-13.0	AT	Up	73.9	155.9	Up	03:21:01 - 03:29:17	2671
Kelowna	03:25:08	-13.1	AT	Up	73.7	156.8	Up	03:21:00 - 03:29:16	2668
Penticton	03:25:09	-13.1	AT	Up	74.0	156.1	Up	03:21:01 - 03:29:17	2661
Oliver	03:25:10	-13.2	AT	Up	74.3	155.6	Up	03:21:02 - 03:29:18	2648
Manson/Chelan	03:25:15	-13.3	AT	Up	75.3	151.8	Up	03:21:07 - 03:29:23	2639
Wenatchee	03:25:17	-13.3	AT	Up	75.7	150.4	Up	03:21:09 - 03:29:25	2633
Ellensburg	03:25:18	-13.3	AT	Up	75.9	148.9	Up	03:21:10 - 03:29:26	2633
Anarchist Mountain Observatory	03:25:11	-13.4	AT	Up	74.5	155.9	Up	03:21:03 - 03:29:19	2629
The Dalles	03:25:23	-13.3	AT	Up	76.9	143.8	Up	03:21:15 - 03:29:31	2626
Brewster	03:25:14	-13.5	AT	Up	75.2	153.2	Up	03:21:06 - 03:29:22	2622
Yakima	03:25:19	-13.4	AT	Up	76.3	148.0	Up	03:21:11 - 03:29:27	2619
Okanogan	03:25:13	-13.5	AT	Up	75.0	154.3	Up	03:21:05 - 03:29:21	2619
Sisters	03:25:28	-13.5	AT	Up	77.7	139.0	Up	03:21:20 - 03:29:36	2605
Maupin	03:25:24	-13.5	AT	Up	77.3	143.1	Up	03:21:16 - 03:29:32	2602
Toppenish/White Swan	03:25:20	-13.6	AT	Up	76.5	148.1	Up	03:21:12 - 03:29:28	2598
Oregon Observatory	03:25:29	-13.7	AT	Up	78.1	138.2	Up	03:21:21 - 03:29:37	2580
Bend	03:25:28	-13.7	AT	Up	78.0	139.1	Up	03:21:20 - 03:29:36	2577
Chiloquin	03:25:34	-13.8	AT	Up	78.8	132.4	Up	03:21:26 - 03:29:42	2562
Klamath Falls	03:25:35	-13.9	AT	Up	79.1	131.3	Up	03:21:27 - 03:29:43	2542
PNWRO	03:25:20	-14.7	AT	Up	77.4	152.3	Up	03:21:12 - 03:29:28	2477
Fall River/Burney	03:25:38	-14.5	AT	Up	80.1	127.6	Up	03:21:30 - 03:29:46	2468
Greenville	03:25:40	-15.1	AT	Up	80.9	124.8	Up	03:21:32 - 03:29:48	2397
Cedarville	03:25:35	-15.3	AT	Up	80.5	134.1	Up	03:21:27 - 03:29:43	2392
Gimple	03:25:40	-15.2	AT	Up	81.0	125.1	Up	03:21:32 - 03:29:48	2390
Quincy	03:25:41	-15.2	AT	Up	81.0	123.8	Up	03:21:33 - 03:29:49	2389
Portola	03:25:41	-15.6	AT	Up	81.4	124.7	Up	03:21:33 - 03:29:49	2346
Reno	03:25:41	-16.1	AT	Up	82.0	125.6	Up	03:21:33 - 03:29:49	2284
Carson City	03:25:42	-16.3	AT	Up	82.2	123.6	Up	03:21:34 - 03:29:50	2267
Gardnerville	03:25:43	-16.4	AT	Up	82.3	122.3	Up	03:21:35 - 03:29:51	2253
Yerington	03:25:42	-16.8	AT	Up	82.7	124.9	Up	03:21:34 - 03:29:50	2209
Lee Vining	03:25:46	-17.1	AT	Up	83.3	118.0	Up	03:21:38 - 03:29:54	2162
Hawthorne	03:25:43	-17.3	AT	Up	83.3	124.0	Up	03:21:35 - 03:29:51	2147
Bishop	03:25:47	-17.8	AT	Up	84.1	116.0	Up	03:21:39 - 03:29:55	2078
Wildwood	03:25:57	-18.7	Dark	Up	84.5	83.0	Up	03:21:49 - 03:30:05	1952
Beatty	03:25:46	-19.2	Dark	Up	85.4	119.1	Up	03:21:38 - 03:29:54	1924
Sleaford	03:24:49	-19.8	Dark	Up	72.0	195.5	Up	03:20:41 - 03:28:57	1920
Idyllwild	03:25:56	-20.3	Dark	Up	86.0	76.5	Up	03:21:48 - 03:30:04	1777
Laughlin/Bullhead City	03:25:49	-21.5	Dark	Up	87.7	104.3	Up	03:21:41 - 03:29:57	1665
Calipatria	03:25:57	-21.4	Dark	Up	86.7	62.9	Up	03:21:49 - 03:30:05	1648
Patrick	03:25:48	-21.9	Dark	Up	88.2	116.9	Up	03:21:40 - 03:29:56	1619
Lake Havasu City	03:25:51	-21.9	Dark	Up	88.0	86.8	Up	03:21:43 - 03:29:59	1612
Yuma	03:25:57	-22.2	Dark	Up	87.1	49.0	Up	03:21:49 - 03:30:05	1552
George/Scottsdale	03:25:50	-24.1	Dark	Up	89.1	356.0	Up	03:21:42 - 03:29:58	1370
Dunrhomin	03:25:22	-26.2	Dark	Up	82.3	225.0	Up	03:21:14 - 03:29:30	1200
CU-SBO	03:25:23	-26.2	Dark	Up	82.5	225.9	Up	03:21:15 - 03:29:31	1194
Nikitin	03:25:22	-26.3	Dark	Up	82.4	225.9	Up	03:21:14 - 03:29:30	1191

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, (2024/09/17 03:28UT)
Object            RA         Dec     mag  sep  mel
Vega           18:36:56.7 +38:47:07  0.0 14.14  77
37Gam Cyg      20:22:13.7 +40:15:24  2.2  9.41  61
PPM 083442     19:43:51.4 +34:09:46  5.9  0.43  63
PPM 083465     19:44:38.2 +34:24:51  7.7  0.18  63
PPM 083474     19:45:05.0 +34:33:14  9.3  0.15  63
342842         19:44:23.4 +34:34:56 16.6        63
Positions are for J2000

Event circumstances last updated at 2024/03/02 05:58:15 UT

RECON