RECON: TNO occultation with 54598

Event between (54598) Bienor and star GA1320:03394492 with event index number of 1210489

Geocentric closest approach at 2023/02/04 10:29:21 UTC

J2000 position of star is 05:55:54.9 +43:26:45
Equinox of date position of star is 05:57:35.0 +43:26:51
Stellar brightness G=16.3, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 34 degrees from the moon. Moon is 98% illuminated.
Apparent brightness V=19.0

[RECON map]
Object is 13.7 AU from the Sun and 13.0 AU from the Earth.
Apparent velocity is 15.3 km/sec on the sky relative to the star, or, 5.8 arcsec/hr.
The 1-sigma error in the time of the event is 36 seconds.
The 1-sigma cross-track error in the shadow position is 511 km.
The sky-plane scale is 9462.6 km/arcsec.

The object has an absolute magnitude Hv=7.4
Diameter=195.0 km assuming a 5% albedo -- 12.8 sec chord
Diameter=79.6 km assuming a 30% albedo -- 5.2 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 54598, (2023/02/04 10:29UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.6 +27:58:07  1.1 26.83   8
34Bet Aur      06:01:13.4 +44:56:50  1.9  1.64  34
38 Aur         06:04:57.9 +42:54:30  6.1  1.45  33
PPM 048556     05:57:11.6 +43:35:38  8.4  0.16  34
54598          05:57:35.1 +43:26:51 16.3        34
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 21.1 km RECON observability=1.0 and success probability=87.5%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	10:23:26	-38.8	Dark	Up	30.1	303.3	Up	10:19:56 - 10:26:56	1216
Kamloops	10:23:50	-47.0	Dark	Up	37.2	295.9	Up	10:20:20 - 10:27:20	540
Kelowna	10:23:46	-47.1	Dark	Up	36.3	296.9	Up	10:20:16 - 10:27:16	490
Peachland	10:23:46	-47.3	Dark	Up	36.4	296.8	Up	10:20:16 - 10:27:16	469
Summerland	10:23:46	-47.4	Dark	Up	36.3	296.9	Up	10:20:16 - 10:27:16	458
Penticton	10:23:45	-47.4	Dark	Up	36.2	297.1	Up	10:20:15 - 10:27:15	455
Oliver	10:23:44	-47.6	Dark	Up	36.1	297.3	Up	10:20:14 - 10:27:14	421
Anarchist Mountain Observatory	10:23:44	-47.6	Dark	Up	35.9	297.5	Up	10:20:14 - 10:27:14	411
Okanogan	10:23:43	-48.1	Dark	Up	35.7	297.8	Up	10:20:13 - 10:27:13	340
Brewster	10:23:43	-48.4	Dark	Up	35.7	297.8	Up	10:20:13 - 10:27:13	306
Manson/Chelan	10:23:44	-48.7	Dark	Up	35.8	297.8	Up	10:20:14 - 10:27:14	273
Victoria	10:23:53	-49.9	Dark	Up	38.0	295.7	Up	10:20:23 - 10:27:23	227
Dunrhomin	10:22:57	-42.8	Dark	Up	22.8	308.4	Low	10:19:27 - 10:26:27	221
Wenatchee	10:23:43	-49.1	Dark	Up	35.7	298.0	Up	10:20:13 - 10:27:13	220
Nikitin	10:22:56	-42.9	Dark	Up	22.7	308.5	Low	10:19:26 - 10:26:26	204
CU-SBO	10:22:56	-42.9	Dark	Up	22.7	308.5	Low	10:19:26 - 10:26:26	194
Ellensburg	10:23:43	-49.5	Dark	Up	35.6	298.2	Up	10:20:13 - 10:27:13	172
PNWRO	10:23:37	-49.2	Dark	Up	34.2	299.6	Up	10:20:07 - 10:27:07	135
Yakima	10:23:42	-49.8	Dark	Up	35.5	298.4	Up	10:20:12 - 10:27:12	131
Toppenish/White Swan	10:23:41	-49.8	Dark	Up	35.3	298.6	Up	10:20:11 - 10:27:11	116
The Dalles	10:23:42	-50.7	Dark	Up	35.4	298.7	Up	10:20:12 - 10:27:12	11
Maupin	10:23:41	-50.9	Dark	Up	35.1	299.0	Up	10:20:11 - 10:27:11	-27
Sisters	10:23:41	-51.7	Dark	Up	35.0	299.3	Up	10:20:11 - 10:27:11	-131
Bend	10:23:40	-51.7	Dark	Up	34.7	299.6	Up	10:20:10 - 10:27:10	-146
Oregon Observatory	10:23:40	-51.9	Dark	Up	34.7	299.6	Up	10:20:10 - 10:27:10	-167
Chiloquin	10:23:39	-52.9	Dark	Up	34.3	300.2	Up	10:20:09 - 10:27:09	-313
Klamath Falls	10:23:38	-53.1	Dark	Up	34.1	300.5	Up	10:20:08 - 10:27:08	-344
Cedarville	10:23:33	-52.5	Dark	Up	32.7	301.5	Up	10:20:03 - 10:27:03	-351
Fall River/Burney	10:23:36	-53.5	Dark	Up	33.2	301.3	Up	10:20:06 - 10:27:06	-445
Gimple	10:23:33	-53.7	Dark	Up	32.4	302.0	Up	10:20:03 - 10:27:03	-514
Greenville	10:23:33	-53.7	Dark	Up	32.5	302.0	Up	10:20:03 - 10:27:03	-517
Reno	10:23:29	-53.3	Dark	Up	31.4	302.7	Up	10:19:59 - 10:26:59	-530
Portola	10:23:31	-53.6	Dark	Up	32.0	302.3	Up	10:20:01 - 10:27:01	-530
Quincy	10:23:33	-53.8	Dark	Up	32.4	302.1	Up	10:20:03 - 10:27:03	-537
Yerington	10:23:27	-53.1	Dark	Up	30.7	303.2	Up	10:19:57 - 10:26:57	-557
Carson City	10:23:29	-53.5	Dark	Up	31.2	302.9	Up	10:19:59 - 10:26:59	-564
Hawthorne	10:23:25	-53.0	Dark	Up	30.1	303.7	Up	10:19:55 - 10:26:55	-579
Gardnerville	10:23:28	-53.6	Dark	Up	31.1	303.1	Up	10:19:58 - 10:26:58	-586
Beatty	10:23:18	-52.4	Dark	Up	28.0	305.1	Low	10:19:48 - 10:26:48	-653
Lee Vining	10:23:25	-53.6	Dark	Up	30.1	303.8	Up	10:19:55 - 10:26:55	-654
Patrick	10:23:09	-50.8	Dark	Up	25.3	306.7	Low	10:19:39 - 10:26:39	-657
Bishop	10:23:23	-53.4	Dark	Up	29.3	304.3	Low	10:19:53 - 10:26:53	-681
George/Scottsdale	10:23:02	-49.7	Dark	Up	22.9	308.0	Low	10:19:32 - 10:26:32	-711
Laughlin/Bullhead City	10:23:10	-51.4	Dark	Up	25.6	306.5	Low	10:19:40 - 10:26:40	-713
Lake Havasu City	10:23:09	-51.4	Dark	Up	25.0	306.9	Low	10:19:39 - 10:26:39	-763
Yuma	10:23:09	-52.2	Dark	Up	24.1	307.4	Low	10:19:39 - 10:26:39	-945
Idyllwild	10:23:15	-53.5	Dark	Up	26.1	306.4	Low	10:19:45 - 10:26:45	-948
Calipatria	10:23:11	-52.8	Dark	Up	25.0	307.0	Low	10:19:41 - 10:26:41	-949
Wildwood	10:23:20	-54.8	Dark	Up	27.6	305.7	Low	10:19:50 - 10:26:50	-1001

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 54598, (2023/02/04 10:29UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 26.83   8
34Bet Aur      05:59:31.6 +44:56:51  1.9  1.64  34
38 Aur         06:03:18.2 +42:54:39  6.1  1.45  33
PPM 048556     05:55:31.2 +43:35:31  8.4  0.16  34
54598          05:55:54.9 +43:26:45 16.3        34
Positions are for J2000

Event circumstances last updated at 2023/01/23 03:11:01 UT

RECON