RECON: TNO occultation with 52975

Event between (52975) Cyllarus and star GA1200:03186404 with event index number of 2442831

Geocentric closest approach at 2023/02/11 12:02:25 UTC

J2000 position of star is 08:28:54.6 +31:44:30
Equinox of date position of star is 08:30:20.5 +31:39:50
Stellar brightness G=15.8, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 85 degrees from the moon. Moon is 72% illuminated.
Apparent brightness V=23.6

[RECON map]
Object is 29.6 AU from the Sun and 28.7 AU from the Earth.
Apparent velocity is 23.7 km/sec on the sky relative to the star, or, 4.1 arcsec/hr.
The 1-sigma error in the time of the event is 120 seconds.
The 1-sigma cross-track error in the shadow position is 1199 km.
The sky-plane scale is 20807.5 km/arcsec.

The object has an absolute magnitude Hv=8.9
Diameter=104.7 km assuming a 5% albedo -- 4.2 sec chord
Diameter=42.8 km assuming a 30% albedo -- 1.7 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 52975, (2023/02/11 12:02UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.7 +27:58:07  1.1 10.15  93
PPM 073899     08:41:44.0 +31:51:30  6.5  2.43  82
PPM 073786     08:33:40.4 +32:05:26  8.0  0.83  84
PPM 073744     08:30:29.9 +31:42:51 10.0  0.06  85
52975          08:30:20.8 +31:39:49 15.8        84
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 12.7 km RECON observability=1.0 and success probability=0.4%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	12:00:11	-22.9	Dark	Up	25.6	289.6	Low	11:49:40 - 12:10:42	6105
Dunrhomin	11:59:26	-23.3	Dark	Up	20.7	294.6	Low	11:48:55 - 12:09:57	5514
Nikitin	11:59:24	-23.3	Dark	Up	20.7	294.7	Low	11:48:53 - 12:09:55	5502
CU-SBO	11:59:24	-23.4	Dark	Up	20.7	294.7	Low	11:48:53 - 12:09:55	5495
Kamloops	12:00:07	-32.0	Dark	Up	33.9	280.4	Up	11:49:36 - 12:10:38	5493
Kelowna	12:00:04	-31.7	Dark	Up	33.2	281.5	Up	11:49:33 - 12:10:35	5481
Peachland	12:00:04	-31.9	Dark	Up	33.4	281.4	Up	11:49:33 - 12:10:35	5462
Penticton	12:00:03	-31.9	Dark	Up	33.2	281.6	Up	11:49:32 - 12:10:34	5458
Summerland	12:00:03	-31.9	Dark	Up	33.3	281.5	Up	11:49:32 - 12:10:34	5457
Oliver	12:00:02	-32.0	Dark	Up	33.1	281.9	Up	11:49:31 - 12:10:33	5437
Anarchist Mountain Observatory	12:00:01	-31.9	Dark	Up	33.0	282.1	Up	11:49:30 - 12:10:32	5435
Okanogan	11:59:59	-32.2	Dark	Up	33.0	282.4	Up	11:49:28 - 12:10:30	5387
Brewster	11:59:58	-32.4	Dark	Up	33.1	282.4	Up	11:49:27 - 12:10:29	5362
Manson/Chelan	11:59:57	-32.7	Dark	Up	33.3	282.3	Up	11:49:26 - 12:10:28	5334
Wenatchee	11:59:55	-33.0	Dark	Up	33.3	282.5	Up	11:49:24 - 12:10:26	5298
PNWRO	11:59:49	-32.4	Dark	Up	32.0	284.2	Up	11:49:18 - 12:10:20	5270
Ellensburg	11:59:54	-33.2	Dark	Up	33.3	282.6	Up	11:49:23 - 12:10:25	5263
Victoria	12:00:02	-34.6	Dark	Up	35.5	279.7	Up	11:49:31 - 12:10:33	5242
Yakima	11:59:52	-33.4	Dark	Up	33.3	282.8	Up	11:49:21 - 12:10:23	5237
Toppenish/White Swan	11:59:51	-33.3	Dark	Up	33.1	283.1	Up	11:49:20 - 12:10:22	5230
The Dalles	11:59:49	-34.1	Dark	Up	33.5	283.1	Up	11:49:18 - 12:10:20	5146
Maupin	11:59:48	-34.1	Dark	Up	33.3	283.4	Up	11:49:17 - 12:10:19	5124
Sisters	11:59:45	-34.7	Dark	Up	33.4	283.7	Up	11:49:14 - 12:10:16	5044
Bend	11:59:43	-34.6	Dark	Up	33.2	284.0	Up	11:49:12 - 12:10:14	5040
Oregon Observatory	11:59:43	-34.7	Dark	Up	33.3	284.0	Up	11:49:12 - 12:10:14	5022
Cedarville	11:59:33	-34.4	Dark	Up	31.8	286.1	Up	11:49:02 - 12:10:04	4919
Chiloquin	11:59:39	-35.4	Dark	Up	33.2	284.6	Up	11:49:08 - 12:10:10	4914
Klamath Falls	11:59:37	-35.4	Dark	Up	33.1	284.9	Up	11:49:06 - 12:10:08	4894
Fall River/Burney	11:59:33	-35.4	Dark	Up	32.5	285.8	Up	11:49:02 - 12:10:04	4829
Reno	11:59:26	-34.6	Dark	Up	31.0	287.5	Up	11:48:55 - 12:09:57	4796
Gimple	11:59:29	-35.2	Dark	Up	31.9	286.6	Up	11:48:58 - 12:10:00	4789
Yerington	11:59:24	-34.2	Dark	Up	30.3	288.1	Up	11:48:53 - 12:09:55	4787
Patrick	11:59:10	-30.5	Dark	Up	25.2	292.3	Low	11:48:39 - 12:09:41	4787
Greenville	11:59:29	-35.3	Dark	Up	32.0	286.6	Up	11:48:58 - 12:10:00	4785
Portola	11:59:28	-35.0	Dark	Up	31.5	287.0	Up	11:48:57 - 12:09:59	4785
Hawthorne	11:59:22	-33.8	Dark	Up	29.8	288.6	Low	11:48:51 - 12:09:53	4779
Carson City	11:59:26	-34.6	Dark	Up	30.8	287.7	Up	11:48:55 - 12:09:57	4771
Quincy	11:59:29	-35.3	Dark	Up	31.9	286.7	Up	11:48:58 - 12:10:00	4771
George/Scottsdale	11:59:03	-28.9	Dark	Up	23.0	293.8	Low	11:48:32 - 12:09:34	4764
Gardnerville	11:59:24	-34.6	Dark	Up	30.7	287.8	Up	11:48:53 - 12:09:55	4756
Beatty	11:59:15	-32.6	Dark	Up	27.9	290.3	Low	11:48:44 - 12:09:46	4752
Laughlin/Bullhead City	11:59:09	-31.1	Dark	Up	25.6	292.1	Low	11:48:38 - 12:09:40	4734
Lee Vining	11:59:20	-34.3	Dark	Up	30.0	288.7	Low	11:48:49 - 12:09:51	4716
Bishop	11:59:19	-33.8	Dark	Up	29.2	289.3	Low	11:48:48 - 12:09:50	4707
Lake Havasu City	11:59:07	-30.9	Dark	Up	25.2	292.5	Low	11:48:36 - 12:09:38	4698
Yuma	11:59:01	-31.3	Dark	Up	24.7	293.1	Low	11:48:30 - 12:09:32	4549
Calipatria	11:59:03	-32.0	Dark	Up	25.6	292.6	Low	11:48:32 - 12:09:34	4536
Idyllwild	11:59:05	-32.9	Dark	Up	26.7	291.8	Low	11:48:34 - 12:09:36	4523
Wildwood	11:59:07	-34.5	Dark	Up	28.3	290.9	Low	11:48:36 - 12:09:38	4454

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 52975, (2023/02/11 12:02UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 10.15  93
PPM 073899     08:40:18.2 +31:56:30  6.5  2.43  82
PPM 073786     08:32:14.1 +32:10:12  8.0  0.83  84
PPM 073744     08:29:03.6 +31:47:32 10.0  0.06  85
52975          08:28:54.6 +31:44:30 15.8        85
Positions are for J2000

Event circumstances last updated at 2023/01/09 03:32:37 UT

RECON