RECON: TNO occultation with 523642

Event between (523642) 10SS43 and star GA1320:00541236 with event index number of 2382974

Geocentric closest approach at 2027/07/20 09:45:33 UTC

J2000 position of star is 01:47:03.6 +43:32:19
Equinox of date position of star is 01:48:27.2 +43:39:08
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 86 degrees from the moon. Moon is 97% illuminated.
TNO apparent brightness V=21.6

[RECON map]
TNO is 37.7 AU from the Sun and 37.9 AU from the Earth.
The TNO is moving 19.9 km/sec on the sky relative to the star, or, 2.6 arcsec/hr.
The 1-sigma error in the time of the event is 139 seconds.
The 1-sigma cross-track error in the shadow position is 3073 km.
The sky-plane scale is 27494.8 km/arcsec.

The TNO has an absolute magnitude Hv=5.7
Diameter=424.6 km assuming a 5% albedo -- 21.6 sec chord
Diameter=173.4 km assuming a 30% albedo -- 8.8 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 523642, (2027/07/20 09:46UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:30.3 +16:33:46  0.8 44.73 113
57Gam1And      02:05:36.2 +42:27:38  2.3  3.31  88
PPM 044298     01:42:19.4 +43:26:10  5.8  1.19  84
PPM 044402     01:47:59.8 +43:50:33  7.2  0.21  85
PPM 044407     01:48:12.7 +43:43:11  9.5  0.10  85
523642         01:48:44.3 +43:40:31 15.7        86
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 9.9 km RECON observability=1.0 and success probability=8.3%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Wildwood	09:45:17	-29.9	Dark	Up	42.6	59.5	Up	09:33:10 - 09:57:23	-1569
Idyllwild	09:45:11	-29.4	Dark	Up	43.7	59.5	Up	09:33:05 - 09:57:18	-1664
Quincy	09:45:50	-25.4	Dark	Up	43.8	63.8	Up	09:33:44 - 09:57:57	-1672
Greenville	09:45:51	-25.2	Dark	Up	43.9	63.9	Up	09:33:45 - 09:57:58	-1681
Lee Vining	09:45:37	-26.6	Dark	Up	44.1	62.6	Up	09:33:30 - 09:57:43	-1682
Gimple	09:45:51	-25.2	Dark	Up	43.9	64.0	Up	09:33:44 - 09:57:57	-1685
Gardnerville	09:45:43	-25.9	Dark	Up	44.1	63.3	Up	09:33:36 - 09:57:49	-1689
Portola	09:45:49	-25.4	Dark	Up	44.1	63.8	Up	09:33:42 - 09:57:55	-1690
Carson City	09:45:44	-25.7	Dark	Up	44.2	63.5	Up	09:33:38 - 09:57:51	-1697
Bishop	09:45:32	-26.9	Dark	Up	44.3	62.2	Up	09:33:26 - 09:57:39	-1697
Fall River/Burney	09:45:56	-24.5	Dark	Up	44.0	64.6	Up	09:33:50 - 09:58:03	-1699
Reno	09:45:46	-25.4	Dark	Up	44.4	63.8	Up	09:33:39 - 09:57:52	-1711
Calipatria	09:45:05	-29.4	Dark	Up	44.2	59.2	Up	09:32:59 - 09:57:12	-1716
Yerington	09:45:42	-25.7	Dark	Up	44.6	63.5	Up	09:33:35 - 09:57:48	-1721
Hawthorne	09:45:38	-25.9	Dark	Up	44.7	63.2	Up	09:33:32 - 09:57:45	-1730
Klamath Falls	09:46:03	-23.6	Dark	Up	44.2	65.5	Up	09:33:56 - 09:58:09	-1736
Chiloquin	09:46:05	-23.3	Dark	Up	44.3	65.8	Up	09:33:58 - 09:58:11	-1748
Yuma	09:45:02	-29.4	Dark	Up	44.6	58.9	Up	09:32:55 - 09:57:08	-1757
Beatty	09:45:27	-26.7	Dark	Up	45.3	62.2	Up	09:33:20 - 09:57:33	-1770
Cedarville	09:45:56	-23.7	Dark	Up	45.0	65.4	Up	09:33:50 - 09:58:03	-1780
Lake Havasu City	09:45:10	-27.7	Dark	Up	45.8	60.5	Up	09:33:03 - 09:57:16	-1830
Oregon Observatory	09:46:10	-22.0	Dark	Up	45.1	67.1	Up	09:34:04 - 09:58:17	-1831
Laughlin/Bullhead City	09:45:13	-27.3	Dark	Up	46.0	61.1	Up	09:33:07 - 09:57:20	-1837
Bend	09:46:11	-21.8	Dark	Up	45.3	67.4	Up	09:34:04 - 09:58:17	-1846
Sisters	09:46:12	-21.6	Dark	Up	45.2	67.5	Up	09:34:06 - 09:58:19	-1846
Patrick	09:45:13	-26.8	Dark	Up	46.6	61.4	Up	09:33:07 - 09:57:20	-1887
Maupin	09:46:15	-20.7	Dark	Up	45.9	68.5	Up	09:34:09 - 09:58:22	-1913
The Dalles	09:46:18	-20.3	Dark	Up	46.0	68.9	Up	09:34:11 - 09:58:24	-1929
George/Scottsdale	09:45:01	-27.3	Dark	Up	47.2	60.1	Up	09:32:55 - 09:57:08	-1960
Victoria	09:46:36	-18.2	Dark	Up	45.6	70.7	Up	09:34:29 - 09:58:42	-1993
Toppenish/White Swan	09:46:20	-19.4	Dark	Up	46.8	70.0	Up	09:34:13 - 09:58:26	-2005
Yakima	09:46:21	-19.2	Dark	Up	46.7	70.2	Up	09:34:14 - 09:58:27	-2008
Ellensburg	09:46:23	-18.8	Dark	Up	46.9	70.6	Up	09:34:16 - 09:58:29	-2030
PNWRO	09:46:15	-19.3	Dark	Up	47.6	70.3	Up	09:34:09 - 09:58:22	-2054
Wenatchee	09:46:24	-18.4	Dark	Up	47.2	71.1	Up	09:34:18 - 09:58:31	-2062
Manson/Chelan	09:46:26	-17.9	AT	Up	47.4	71.7	Up	09:34:20 - 09:58:33	-2094
Brewster	09:46:27	-17.6	AT	Up	47.7	72.1	Up	09:34:20 - 09:58:33	-2122
Okanogan	09:46:28	-17.3	AT	Up	48.0	72.5	Up	09:34:21 - 09:58:34	-2145
Anarchist Mountain Observatory	09:46:31	-16.7	AT	Up	48.3	73.3	Up	09:34:24 - 09:58:37	-2189
Oliver	09:46:32	-16.6	AT	Up	48.2	73.4	Up	09:34:25 - 09:58:38	-2190
Summerland	09:46:34	-16.2	AT	Up	48.3	73.8	Up	09:34:27 - 09:58:40	-2208
Penticton	09:46:33	-16.2	AT	Up	48.3	73.8	Up	09:34:27 - 09:58:40	-2209
Peachland	09:46:34	-16.1	AT	Up	48.3	73.9	Up	09:34:28 - 09:58:41	-2212
Kelowna	09:46:34	-15.9	AT	Up	48.5	74.2	Up	09:34:28 - 09:58:41	-2231
Kamloops	09:46:55	-15.4	AT	Up	48.2	74.6	Up	09:34:48 - 09:59:01	-2259
CU-SBO	09:45:22	-19.0	Dark	Up	54.7	68.2	Up	09:33:15 - 09:57:28	-2575
Dunrhomin	09:45:22	-18.8	Dark	Up	54.9	68.6	Up	09:33:16 - 09:57:29	-2589
Sleaford	09:46:25	-9.7	NT	Up	57.2	85.6	Up	09:34:19 - 09:58:32	-2990

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 523642, (2027/07/20 09:46UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 44.73 113
57Gam1And      02:03:54.1 +42:19:46  2.3  3.31  88
PPM 044298     01:40:39.8 +43:17:51  5.8  1.19  84
PPM 044402     01:46:19.2 +43:42:20  7.2  0.21  85
PPM 044407     01:46:32.2 +43:34:58  9.5  0.10  85
523642         01:47:03.6 +43:32:19 15.7        86
Positions are for J2000

Event circumstances last updated at 2022/11/22 03:01:21 UT

RECON