RECON: TNO occultation with 60558

Event between (60558) Echeclus and star GA1080:02482248 with event index number of 2337270

Geocentric closest approach at 2023/03/07 06:19:43 UTC

J2000 position of star is 06:53:29.4 +18:42:39
Equinox of date position of star is 06:54:50.7 +18:40:50
Stellar brightness G=16.2, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 61 degrees from the moon. Moon is 100% illuminated.
Apparent brightness V=20.3

[RECON map]
Object is 12.1 AU from the Sun and 11.6 AU from the Earth.
Apparent velocity is 6.7 km/sec on the sky relative to the star, or, 2.9 arcsec/hr.
The 1-sigma error in the time of the event is 67 seconds.
The 1-sigma cross-track error in the shadow position is 423 km.
The sky-plane scale is 8403.9 km/arcsec.

The object has an absolute magnitude Hv=9.2
Diameter=88.3 km assuming a 5% albedo -- 12.9 sec chord
Diameter=36.1 km assuming a 30% albedo -- 5.3 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 60558, (2023/03/07 06:20UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.9 +27:58:06  1.1 15.08  50
Alhena         06:39:03.0 +16:22:39  1.9  4.41  65
PPM 123009     06:47:42.7 +18:48:41  6.5  1.69  63
PPM 123267     06:57:14.7 +18:27:35  7.9  0.61  61
PPM 123171     06:53:20.1 +18:44:12  9.6  0.36  62
60558          06:54:50.9 +18:40:50 16.2        61
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 14.6 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)
Sleaford	06:16:34	-41.8	Dark	Up	39.1	248.3	Up	06:10:30 - 06:22:38	6407
Kamloops	06:17:43	-38.7	Dark	Up	47.5	234.3	Up	06:11:39 - 06:23:47	5842
Kelowna	06:17:26	-39.7	Dark	Up	47.5	236.0	Up	06:11:22 - 06:23:30	5821
Peachland	06:17:26	-39.7	Dark	Up	47.8	235.8	Up	06:11:22 - 06:23:30	5803
Summerland	06:17:25	-39.8	Dark	Up	47.8	236.0	Up	06:11:21 - 06:23:29	5797
Penticton	06:17:25	-39.9	Dark	Up	47.8	236.2	Up	06:11:21 - 06:23:29	5797
Oliver	06:17:18	-40.2	Dark	Up	48.0	236.5	Up	06:11:14 - 06:23:22	5774
Anarchist Mountain Observatory	06:17:14	-40.4	Dark	Up	48.0	236.9	Up	06:11:10 - 06:23:18	5770
Dunrhomin	06:13:51	-52.8	Dark	Up	42.5	258.1	Up	06:07:47 - 06:19:55	5730
Okanogan	06:17:09	-40.8	Dark	Up	48.5	237.2	Up	06:11:05 - 06:23:13	5719
Nikitin	06:13:48	-52.9	Dark	Up	42.5	258.3	Up	06:07:44 - 06:19:52	5716
CU-SBO	06:13:48	-53.0	Dark	Up	42.6	258.3	Up	06:07:44 - 06:19:52	5709
Brewster	06:17:10	-40.9	Dark	Up	48.7	237.2	Up	06:11:06 - 06:23:14	5694
Manson/Chelan	06:17:07	-40.9	Dark	Up	49.1	237.0	Up	06:11:03 - 06:23:11	5667
Wenatchee	06:17:07	-41.2	Dark	Up	49.4	237.2	Up	06:11:03 - 06:23:11	5628
Victoria	06:17:40	-39.1	Dark	Up	50.4	232.6	Up	06:11:36 - 06:23:44	5593
Ellensburg	06:17:01	-41.4	Dark	Up	49.8	237.4	Up	06:10:57 - 06:23:05	5592
PNWRO	06:16:36	-42.9	Dark	Up	49.4	240.1	Up	06:10:32 - 06:22:40	5585
Yakima	06:16:56	-41.7	Dark	Up	50.0	237.7	Up	06:10:52 - 06:23:00	5563
Toppenish/White Swan	06:16:53	-42.0	Dark	Up	50.0	238.1	Up	06:10:49 - 06:22:57	5555
The Dalles	06:16:49	-42.2	Dark	Up	50.9	238.0	Up	06:10:45 - 06:22:53	5471
Maupin	06:16:43	-42.5	Dark	Up	51.1	238.5	Up	06:10:39 - 06:22:47	5445
Sisters	06:16:38	-42.9	Dark	Up	51.9	238.9	Up	06:10:34 - 06:22:42	5363
Bend	06:16:33	-43.2	Dark	Up	51.8	239.4	Up	06:10:29 - 06:22:37	5356
Oregon Observatory	06:16:32	-43.3	Dark	Up	52.0	239.4	Up	06:10:28 - 06:22:36	5339
Chiloquin	06:16:21	-44.0	Dark	Up	53.0	240.4	Up	06:10:17 - 06:22:25	5225
Cedarville	06:15:55	-45.6	Dark	Up	52.4	243.4	Up	06:09:51 - 06:21:59	5215
Klamath Falls	06:16:17	-44.3	Dark	Up	53.1	240.9	Up	06:10:13 - 06:22:21	5203
Fall River/Burney	06:16:01	-45.3	Dark	Up	53.4	242.6	Up	06:09:57 - 06:22:05	5129
Gimple	06:15:47	-46.2	Dark	Up	53.5	244.2	Up	06:09:43 - 06:21:51	5081
Reno	06:15:29	-47.1	Dark	Up	53.1	246.0	Up	06:09:25 - 06:21:33	5079
Greenville	06:15:46	-46.1	Dark	Up	53.6	244.1	Up	06:09:42 - 06:21:50	5078
Portola	06:15:39	-46.6	Dark	Up	53.4	245.0	Up	06:09:35 - 06:21:43	5072
Yerington	06:15:19	-47.9	Dark	Up	52.9	247.3	Up	06:09:15 - 06:21:23	5063
Quincy	06:15:44	-46.3	Dark	Up	53.7	244.4	Up	06:09:40 - 06:21:48	5062
Carson City	06:15:28	-47.4	Dark	Up	53.2	246.5	Up	06:09:24 - 06:21:32	5052
Hawthorne	06:15:09	-48.5	Dark	Up	52.7	248.4	Up	06:09:05 - 06:21:13	5049
Gardnerville	06:15:21	-47.6	Dark	Up	53.3	246.8	Up	06:09:17 - 06:21:25	5035
Patrick	06:13:54	-53.2	Dark	Up	50.3	256.2	Up	06:07:50 - 06:19:58	5011
Beatty	06:14:36	-50.6	Dark	Up	52.0	252.0	Up	06:08:32 - 06:20:40	5002
Lee Vining	06:15:07	-48.6	Dark	Up	53.3	248.6	Up	06:09:03 - 06:21:11	4985
Bishop	06:14:55	-49.4	Dark	Up	53.0	250.0	Up	06:08:51 - 06:20:59	4969
George/Scottsdale	06:13:19	-55.4	Dark	Up	49.1	259.5	Up	06:07:15 - 06:19:23	4967
Laughlin/Bullhead City	06:13:58	-53.0	Dark	Up	50.9	255.9	Up	06:07:54 - 06:20:02	4961
Lake Havasu City	06:13:49	-53.6	Dark	Up	50.8	256.9	Up	06:07:45 - 06:19:53	4919
Yuma	06:13:30	-54.7	Dark	Up	51.5	258.7	Up	06:07:26 - 06:19:34	4760
Calipatria	06:13:45	-53.9	Dark	Up	52.1	257.6	Up	06:07:41 - 06:19:49	4755
Idyllwild	06:14:00	-52.8	Dark	Up	52.9	255.9	Up	06:07:56 - 06:20:04	4753
Wildwood	06:14:21	-51.4	Dark	Up	54.3	253.9	Up	06:08:17 - 06:20:25	4698

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 60558, (2023/03/07 06:20UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 15.08  50
Alhena         06:37:42.8 +16:23:57  1.9  4.41  65
PPM 123009     06:46:21.1 +18:50:16  6.5  1.69  63
PPM 123267     06:55:53.4 +18:29:29  7.9  0.61  61
PPM 123171     06:51:58.6 +18:45:58  9.6  0.36  62
60558          06:53:29.4 +18:42:39 16.2        61
Positions are for J2000

Event circumstances last updated at 2023/02/17 04:10:14 UT

RECON