RECON: TNO occultation with 54598

Event between (54598) Bienor and star GA1320:03463504 with event index number of 1210475

Geocentric closest approach at 2023/01/08 06:10:55 UTC

J2000 position of star is 06:02:30.1 +43:53:52
Equinox of date position of star is 06:04:10.3 +43:53:45
Stellar brightness G=13.5, use SENSEUP=32 with the MallinCam and and exposure time of 500 milli-seconds with the QHY174 camera.
Star is 34 degrees from the moon. Moon is 98% illuminated.
Apparent brightness V=18.8

[RECON map]
Object is 13.7 AU from the Sun and 12.8 AU from the Earth.
Apparent velocity is 20.9 km/sec on the sky relative to the star, or, 8.1 arcsec/hr.
The 1-sigma error in the time of the event is 27 seconds.
The 1-sigma cross-track error in the shadow position is 475 km.
The sky-plane scale is 9312.1 km/arcsec.

The object has an absolute magnitude Hv=7.4
Diameter=195.0 km assuming a 5% albedo -- 9.3 sec chord
Diameter=79.6 km assuming a 30% albedo -- 3.8 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 54598, (2023/01/08 06:11UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:43.4 +27:58:07  1.1 25.98   9
34Bet Aur      06:01:13.1 +44:56:50  1.9  1.18  35
38 Aur         06:04:57.6 +42:54:30  6.1  1.00  34
PPM 048699     06:05:13.8 +43:47:14  8.1  0.22  34
PPM 048693     06:04:56.6 +44:01:35  8.9  0.19  34
54598          06:04:10.5 +43:53:45 13.5        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 27.0 km RECON observability=1.0 and success probability=14.5%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Kamloops	06:11:24	-53.7	Dark	Up	80.1	129.3	Up	06:08:37 - 06:14:11	2751
Sleaford	06:10:36	-58.1	Dark	Up	81.5	198.0	Up	06:07:49 - 06:13:23	2664
Kelowna	06:11:23	-54.6	Dark	Up	81.1	128.3	Up	06:08:36 - 06:14:10	2646
Peachland	06:11:24	-54.5	Dark	Up	81.0	126.8	Up	06:08:37 - 06:14:11	2641
Summerland	06:11:24	-54.7	Dark	Up	81.2	126.4	Up	06:08:37 - 06:14:11	2624
Penticton	06:11:24	-54.8	Dark	Up	81.2	126.4	Up	06:08:37 - 06:14:11	2614
Victoria	06:11:38	-53.4	Dark	Up	79.5	111.1	Up	06:08:51 - 06:14:25	2601
Oliver	06:11:24	-55.0	Dark	Up	81.5	124.5	Up	06:08:37 - 06:14:11	2577
Anarchist Mountain Observatory	06:11:24	-55.2	Dark	Up	81.7	124.2	Up	06:08:37 - 06:14:11	2555
Okanogan	06:11:26	-55.5	Dark	Up	81.9	119.7	Up	06:08:39 - 06:14:13	2492
Brewster	06:11:27	-55.6	Dark	Up	81.9	117.4	Up	06:08:40 - 06:14:14	2468
Manson/Chelan	06:11:28	-55.5	Dark	Up	81.8	115.1	Up	06:08:41 - 06:14:15	2455
Wenatchee	06:11:30	-55.7	Dark	Up	81.9	111.7	Up	06:08:43 - 06:14:17	2409
Ellensburg	06:11:31	-55.9	Dark	Up	81.9	108.4	Up	06:08:44 - 06:14:18	2371
Yakima	06:11:32	-56.1	Dark	Up	82.0	105.7	Up	06:08:45 - 06:14:19	2329
Toppenish/White Swan	06:11:32	-56.3	Dark	Up	82.1	104.5	Up	06:08:45 - 06:14:19	2302
The Dalles	06:11:36	-56.3	Dark	Up	81.8	97.8	Up	06:08:49 - 06:14:23	2240
PNWRO	06:11:27	-57.4	Dark	Up	83.2	104.8	Up	06:08:40 - 06:14:14	2227
Maupin	06:11:37	-56.6	Dark	Up	81.9	95.1	Up	06:08:50 - 06:14:24	2193
Sisters	06:11:40	-56.8	Dark	Up	81.6	88.6	Up	06:08:53 - 06:14:27	2114
Bend	06:11:39	-57.1	Dark	Up	81.7	87.1	Up	06:08:52 - 06:14:26	2082
Oregon Observatory	06:11:40	-57.1	Dark	Up	81.6	85.9	Up	06:08:53 - 06:14:27	2067
Chiloquin	06:11:44	-57.5	Dark	Up	81.2	77.3	Up	06:08:57 - 06:14:31	1940
Klamath Falls	06:11:44	-57.7	Dark	Up	81.1	75.1	Up	06:08:57 - 06:14:31	1902
Cedarville	06:11:39	-59.1	Dark	Up	82.0	69.2	Up	06:08:52 - 06:14:26	1786
Fall River/Burney	06:11:45	-58.5	Dark	Up	81.0	67.6	Up	06:08:58 - 06:14:32	1768
Greenville	06:11:44	-59.2	Dark	Up	81.0	61.8	Up	06:08:57 - 06:14:31	1660
Gimple	06:11:44	-59.3	Dark	Up	81.0	61.7	Up	06:08:57 - 06:14:31	1658
Quincy	06:11:45	-59.3	Dark	Up	80.9	60.7	Up	06:08:58 - 06:14:32	1639
Portola	06:11:43	-59.7	Dark	Up	81.1	59.2	Up	06:08:56 - 06:14:30	1613
Reno	06:11:41	-60.3	Dark	Up	81.4	56.4	Up	06:08:54 - 06:14:28	1567
Carson City	06:11:42	-60.4	Dark	Up	81.2	54.5	Up	06:08:55 - 06:14:29	1529
Gardnerville	06:11:42	-60.6	Dark	Up	81.1	53.1	Up	06:08:55 - 06:14:29	1502
Yerington	06:11:40	-61.0	Dark	Up	81.5	51.9	Up	06:08:53 - 06:14:27	1491
Hawthorne	06:11:38	-61.5	Dark	Up	81.5	48.1	Up	06:08:51 - 06:14:25	1428
Lee Vining	06:11:41	-61.5	Dark	Up	80.8	46.8	Up	06:08:54 - 06:14:28	1381
Dunrhomin	06:10:43	-68.4	Dark	Up	85.1	319.4	Up	06:07:56 - 06:13:30	1358
Nikitin	06:10:43	-68.6	Dark	Up	85.0	320.9	Up	06:07:56 - 06:13:30	1338
CU-SBO	06:10:43	-68.6	Dark	Up	84.9	321.8	Up	06:07:56 - 06:13:30	1332
Bishop	06:11:39	-62.2	Dark	Up	80.8	42.1	Up	06:08:52 - 06:14:26	1299
Beatty	06:11:33	-63.6	Dark	Up	81.2	34.9	Up	06:08:46 - 06:14:20	1209
Patrick	06:11:23	-66.3	Dark	Up	81.0	19.1	Up	06:08:36 - 06:14:10	983
Laughlin/Bullhead City	06:11:26	-65.9	Dark	Up	80.5	21.5	Up	06:08:39 - 06:14:13	973
Wildwood	06:11:44	-63.3	Dark	Up	78.1	32.1	Up	06:08:57 - 06:14:31	960
Lake Havasu City	06:11:26	-66.4	Dark	Up	80.0	19.1	Up	06:08:39 - 06:14:13	895
Idyllwild	06:11:37	-64.9	Dark	Up	78.5	25.7	Up	06:08:50 - 06:14:24	872
Calipatria	06:11:33	-66.0	Dark	Up	78.3	20.8	Up	06:08:46 - 06:14:20	779
George/Scottsdale	06:11:17	-68.5	Dark	Up	79.7	8.5	Up	06:08:30 - 06:14:04	759
Yuma	06:11:30	-66.9	Dark	Up	78.2	17.2	Up	06:08:43 - 06:14:17	712

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, (2023/01/08 06:11UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 25.98   9
34Bet Aur      05:59:31.6 +44:56:51  1.9  1.18  35
38 Aur         06:03:18.2 +42:54:39  6.1  1.00  34
PPM 048699     06:03:33.5 +43:47:23  8.1  0.22  34
PPM 048693     06:03:16.1 +44:01:43  8.9  0.19  34
54598          06:02:30.1 +43:53:52 13.5        34
Positions are for J2000

Event circumstances last updated at 2022/12/24 03:39:16 UT

RECON