RECON: TNO occultation with 60558

Event between (60558) Echeclus and star GA1080:02531898 with event index number of 2337286

Geocentric closest approach at 2023/04/27 06:08:32 UTC

J2000 position of star is 06:57:10.3 +18:56:07
Equinox of date position of star is 06:58:31.7 +18:54:11
Stellar brightness G=14.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 19 degrees from the moon. Moon is 44% illuminated.
Apparent brightness V=20.5

[RECON map]
Object is 12.2 AU from the Sun and 12.5 AU from the Earth.
Apparent velocity is 18.6 km/sec on the sky relative to the star, or, 7.4 arcsec/hr.
The 1-sigma error in the time of the event is 26 seconds.
The 1-sigma cross-track error in the shadow position is 454 km.
The sky-plane scale is 9082.0 km/arcsec.

The object has an absolute magnitude Hv=9.2
Diameter=88.3 km assuming a 5% albedo -- 4.7 sec chord
Diameter=36.1 km assuming a 30% albedo -- 1.9 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 60558, (2023/04/27 06:09UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:44.5 +27:58:05  1.1 14.28   7
Alhena         06:39:03.5 +16:22:39  1.9  5.28  24
PPM 123009     06:47:43.2 +18:48:41  6.5  2.56  21
PPM 123273     06:57:33.8 +18:46:05  8.1  0.27  19
PPM 123304     06:58:44.2 +19:04:38  9.9  0.18  19
60558          06:58:32.3 +18:54:10 14.9        18
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 0.0 km RECON observability=0.0 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	06:12:03	-23.3	Dark	Up	10.2	287.8	Really Low	06:09:22 - 06:14:43	4803
Kamloops	06:12:09	-21.4	Dark	Up	18.7	277.3	Really Low	06:09:29 - 06:14:50	4385
Kelowna	06:12:13	-22.4	Dark	Up	18.0	278.3	Really Low	06:09:33 - 06:14:54	4348
Peachland	06:12:14	-22.4	Dark	Up	18.2	278.1	Really Low	06:09:33 - 06:14:54	4333
Summerland	06:12:14	-22.6	Dark	Up	18.1	278.2	Really Low	06:09:34 - 06:14:55	4325
Penticton	06:12:15	-22.7	Dark	Up	18.0	278.3	Really Low	06:09:34 - 06:14:55	4323
Oliver	06:12:16	-23.0	Dark	Up	17.9	278.4	Really Low	06:09:36 - 06:14:57	4297
Anarchist Mountain Observatory	06:12:17	-23.2	Dark	Up	17.8	278.6	Really Low	06:09:37 - 06:14:58	4290
Okanogan	06:12:20	-23.7	Dark	Up	17.8	278.7	Really Low	06:09:39 - 06:15:00	4237
Brewster	06:12:21	-23.9	Dark	Up	17.9	278.6	Really Low	06:09:41 - 06:15:02	4213
Manson/Chelan	06:12:22	-24.0	Dark	Up	18.1	278.5	Really Low	06:09:41 - 06:15:02	4189
Victoria	06:12:17	-22.3	Dark	Up	20.4	275.9	Low	06:09:36 - 06:14:57	4158
Wenatchee	06:12:24	-24.3	Dark	Up	18.2	278.5	Really Low	06:09:43 - 06:15:04	4149
Ellensburg	06:12:25	-24.6	Dark	Up	18.3	278.5	Really Low	06:09:45 - 06:15:06	4113
Yakima	06:12:27	-25.0	Dark	Up	18.2	278.6	Really Low	06:09:47 - 06:15:08	4082
PNWRO	06:12:30	-26.1	Dark	Up	17.0	279.9	Really Low	06:09:50 - 06:15:11	4079
Toppenish/White Swan	06:12:28	-25.2	Dark	Up	18.0	278.8	Really Low	06:09:48 - 06:15:09	4070
Dunrhomin	06:12:52	-35.0	Dark	Up	5.7	290.0	Really Low	06:10:12 - 06:15:33	4002
The Dalles	06:12:31	-25.7	Dark	Up	18.5	278.5	Really Low	06:09:51 - 06:15:12	3990
Nikitin	06:12:53	-35.1	Dark	Up	5.7	290.0	Really Low	06:10:12 - 06:15:33	3987
CU-SBO	06:12:53	-35.2	Dark	Up	5.7	290.0	Really Low	06:10:13 - 06:15:34	3980
Maupin	06:12:33	-26.1	Dark	Up	18.3	278.7	Really Low	06:09:52 - 06:15:13	3961
Sisters	06:12:36	-26.6	Dark	Up	18.5	278.7	Really Low	06:09:56 - 06:15:17	3879
Bend	06:12:37	-26.9	Dark	Up	18.3	278.9	Really Low	06:09:57 - 06:15:18	3867
Oregon Observatory	06:12:38	-27.0	Dark	Up	18.4	278.9	Really Low	06:09:58 - 06:15:19	3850
Chiloquin	06:12:43	-28.0	Dark	Up	18.4	279.1	Really Low	06:10:03 - 06:15:24	3734
Klamath Falls	06:12:45	-28.4	Dark	Up	18.3	279.3	Really Low	06:10:04 - 06:15:25	3708
Cedarville	06:12:48	-29.6	Dark	Up	17.0	280.5	Really Low	06:10:08 - 06:15:29	3694
Fall River/Burney	06:12:49	-29.5	Dark	Up	17.8	279.9	Really Low	06:10:09 - 06:15:30	3622
Gimple	06:12:53	-30.5	Dark	Up	17.3	280.5	Really Low	06:10:13 - 06:15:34	3561
Greenville	06:12:53	-30.5	Dark	Up	17.3	280.5	Really Low	06:10:13 - 06:15:34	3559
Portola	06:12:55	-31.0	Dark	Up	16.9	280.9	Really Low	06:10:14 - 06:15:35	3545
Quincy	06:12:54	-30.7	Dark	Up	17.3	280.5	Really Low	06:10:13 - 06:15:34	3542
Reno	06:12:56	-31.4	Dark	Up	16.4	281.3	Really Low	06:10:16 - 06:15:37	3540
Yerington	06:12:59	-32.2	Dark	Up	15.7	281.9	Really Low	06:10:18 - 06:15:39	3512
Carson City	06:12:57	-31.8	Dark	Up	16.3	281.4	Really Low	06:10:16 - 06:15:37	3511
Gardnerville	06:12:58	-32.0	Dark	Up	16.2	281.5	Really Low	06:10:18 - 06:15:39	3491
Hawthorne	06:13:00	-32.8	Dark	Up	15.2	282.3	Really Low	06:10:20 - 06:15:41	3488
Lee Vining	06:13:02	-33.1	Dark	Up	15.5	282.2	Really Low	06:10:22 - 06:15:43	3427
Beatty	06:13:07	-34.9	Dark	Up	13.4	283.8	Really Low	06:10:26 - 06:15:47	3403
Bishop	06:13:04	-33.9	Dark	Up	14.8	282.8	Really Low	06:10:24 - 06:15:45	3396
Patrick	06:13:13	-37.3	Dark	Up	10.7	285.7	Really Low	06:10:32 - 06:15:53	3360
Laughlin/Bullhead City	06:13:13	-37.3	Dark	Up	11.2	285.4	Really Low	06:10:33 - 06:15:54	3318
George/Scottsdale	06:13:18	-39.5	Dark	Up	8.7	287.0	Really Low	06:10:37 - 06:15:58	3274
Lake Havasu City	06:13:15	-38.0	Dark	Up	10.8	285.6	Really Low	06:10:35 - 06:15:56	3267
Idyllwild	06:13:18	-37.8	Dark	Up	12.5	284.5	Really Low	06:10:37 - 06:15:58	3130
Calipatria	06:13:20	-38.8	Dark	Up	11.4	285.3	Really Low	06:10:39 - 06:16:00	3111
Wildwood	06:13:16	-36.7	Dark	Up	14.2	283.5	Really Low	06:10:35 - 06:15:56	3105
Yuma	06:13:21	-39.5	Dark	Up	10.6	285.8	Really Low	06:10:41 - 06:16:02	3100

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, (2023/04/27 06:09UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 14.28   7
Alhena         06:37:42.8 +16:23:57  1.9  5.28  24
PPM 123009     06:46:21.1 +18:50:16  6.5  2.56  21
PPM 123273     06:56:11.8 +18:48:00  8.1  0.27  19
PPM 123304     06:57:22.1 +19:06:36  9.9  0.18  19
60558          06:57:10.3 +18:56:07 14.9        19
Positions are for J2000

Event circumstances last updated at 2023/02/17 04:10:38 UT

RECON