RECON: TNO occultation with 54598

Event between (54598) Bienor and star GA1200:03210239 with event index number of 1655188

Geocentric closest approach at 2027/01/25 13:37:21 UTC

J2000 position of star is 08:40:53.6 +31:27:47
Equinox of date position of star is 08:42:24.1 +31:22:29
Stellar brightness G=14.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 45 degrees from the moon. Moon is 87% illuminated.
Apparent brightness V=18.6

[RECON map]
Object is 13.2 AU from the Sun and 12.2 AU from the Earth.
Apparent velocity is 21.8 km/sec on the sky relative to the star, or, 8.8 arcsec/hr.
The 1-sigma error in the time of the event is 29 seconds.
The 1-sigma cross-track error in the shadow position is 530 km.
The sky-plane scale is 8882.2 km/arcsec.

The object has an absolute magnitude Hv=7.4
Diameter=195.0 km assuming a 5% albedo -- 8.9 sec chord
Diameter=79.6 km assuming a 30% albedo -- 3.6 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 54598, (2027/01/25 13:37UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:58.4 +27:57:31  1.1 12.54  55
PPM 073899     08:41:58.6 +31:50:39  6.5  0.49  46
PPM 073897     08:41:48.5 +30:55:36  9.2  0.47  45
PPM 073921     08:43:44.1 +31:05:42 10.8  0.37  45
54598          08:42:33.6 +31:21:56 14.7        45
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 17.1 km RECON observability=0.8 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	13:34:50	-12.0	AT	Up	23.1	292.1	Low	13:31:54 - 13:37:46	5181
Dunrhomin	13:34:02	-8.2	NT	Up	17.8	296.5	Really Low	13:31:06 - 13:36:58	4590
Kamloops	13:34:45	-20.6	Dark	Up	31.2	282.9	Up	13:31:49 - 13:37:41	4581
Nikitin	13:34:01	-8.2	NT	Up	17.7	296.5	Really Low	13:31:05 - 13:36:57	4578
CU-SBO	13:34:01	-8.2	NT	Up	17.8	296.5	Really Low	13:31:05 - 13:36:57	4571
Kelowna	13:34:41	-20.0	Dark	Up	30.5	284.0	Up	13:31:45 - 13:37:37	4568
Peachland	13:34:40	-20.2	Dark	Up	30.7	283.8	Up	13:31:44 - 13:37:36	4550
Penticton	13:34:40	-20.0	Dark	Up	30.5	284.1	Up	13:31:44 - 13:37:36	4545
Summerland	13:34:40	-20.1	Dark	Up	30.6	284.0	Up	13:31:44 - 13:37:36	4545
Oliver	13:34:38	-20.0	Dark	Up	30.4	284.3	Up	13:31:42 - 13:37:34	4524
Anarchist Mountain Observatory	13:34:37	-19.8	Dark	Up	30.2	284.5	Up	13:31:41 - 13:37:33	4522
Okanogan	13:34:35	-19.9	Dark	Up	30.2	284.7	Up	13:31:39 - 13:37:31	4474
Brewster	13:34:34	-20.0	Dark	Up	30.3	284.7	Up	13:31:38 - 13:37:30	4450
Manson/Chelan	13:34:33	-20.3	Dark	Up	30.5	284.6	Up	13:31:37 - 13:37:29	4423
Wenatchee	13:34:31	-20.3	Dark	Up	30.5	284.8	Up	13:31:35 - 13:37:27	4387
PNWRO	13:34:25	-19.2	Dark	Up	29.2	286.4	Low	13:31:29 - 13:37:21	4358
Ellensburg	13:34:30	-20.4	Dark	Up	30.5	284.9	Up	13:31:34 - 13:37:26	4352
Victoria	13:34:38	-22.5	Dark	Up	32.7	282.1	Up	13:31:42 - 13:37:34	4333
Yakima	13:34:28	-20.4	Dark	Up	30.4	285.1	Up	13:31:32 - 13:37:24	4326
Toppenish/White Swan	13:34:27	-20.3	Dark	Up	30.3	285.3	Up	13:31:31 - 13:37:23	4319
The Dalles	13:34:24	-20.7	Dark	Up	30.6	285.2	Up	13:31:28 - 13:37:20	4236
Maupin	13:34:23	-20.6	Dark	Up	30.4	285.5	Up	13:31:27 - 13:37:19	4214
Sisters	13:34:19	-20.9	Dark	Up	30.5	285.7	Up	13:31:23 - 13:37:15	4135
Bend	13:34:18	-20.7	Dark	Up	30.3	286.0	Up	13:31:22 - 13:37:14	4130
Oregon Observatory	13:34:18	-20.7	Dark	Up	30.3	286.0	Up	13:31:22 - 13:37:14	4113
Cedarville	13:34:08	-19.5	Dark	Up	28.8	288.0	Low	13:31:12 - 13:37:04	4009
Chiloquin	13:34:13	-20.9	Dark	Up	30.3	286.5	Up	13:31:17 - 13:37:09	4006
Klamath Falls	13:34:12	-20.8	Dark	Up	30.1	286.8	Up	13:31:16 - 13:37:08	3986
Fall River/Burney	13:34:07	-20.4	Dark	Up	29.5	287.6	Low	13:31:11 - 13:37:03	3920
Reno	13:34:00	-19.0	Dark	Up	27.9	289.2	Low	13:31:04 - 13:36:56	3886
Gimple	13:34:03	-19.9	Dark	Up	28.8	288.4	Low	13:31:07 - 13:36:59	3880
Yerington	13:33:58	-18.4	Dark	Up	27.2	289.8	Low	13:31:02 - 13:36:54	3877
Greenville	13:34:03	-19.9	Dark	Up	28.9	288.3	Low	13:31:07 - 13:36:59	3877
Portola	13:34:02	-19.5	Dark	Up	28.5	288.7	Low	13:31:06 - 13:36:58	3876
Patrick	13:33:43	-13.6	AT	Up	22.0	293.8	Low	13:30:47 - 13:36:39	3872
Hawthorne	13:33:56	-17.9	AT	Up	26.7	290.3	Low	13:31:00 - 13:36:52	3869
Quincy	13:34:02	-19.9	Dark	Up	28.8	288.4	Low	13:31:06 - 13:36:58	3862
Carson City	13:33:59	-18.9	Dark	Up	27.8	289.4	Low	13:31:03 - 13:36:55	3862
George/Scottsdale	13:33:37	-11.6	NT	Up	19.9	295.2	Really Low	13:30:41 - 13:36:33	3847
Gardnerville	13:33:58	-18.9	Dark	Up	27.7	289.5	Low	13:31:02 - 13:36:54	3847
Beatty	13:33:49	-16.2	AT	Up	24.8	291.9	Low	13:30:53 - 13:36:45	3841
Laughlin/Bullhead City	13:33:43	-14.1	AT	Up	22.5	293.5	Low	13:30:47 - 13:36:39	3820
Lee Vining	13:33:54	-18.2	Dark	Up	26.9	290.3	Low	13:30:58 - 13:36:50	3806
Bishop	13:33:51	-17.5	AT	Up	26.1	290.9	Low	13:30:55 - 13:36:47	3797
Lake Havasu City	13:33:40	-13.7	AT	Up	22.0	293.9	Low	13:30:44 - 13:36:36	3783
Yuma	13:33:34	-13.6	AT	Up	21.5	294.4	Low	13:30:38 - 13:36:30	3635
Calipatria	13:33:36	-14.4	AT	Up	22.4	293.9	Low	13:30:40 - 13:36:32	3623
Idyllwild	13:33:39	-15.5	AT	Up	23.5	293.2	Low	13:30:43 - 13:36:35	3611
Wildwood	13:33:40	-17.1	AT	Up	25.1	292.3	Low	13:30:44 - 13:36:36	3545

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, (2027/01/25 13:37UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 12.54  55
PPM 073899     08:40:18.2 +31:56:30  6.5  0.49  46
PPM 073897     08:40:08.7 +31:01:26  9.2  0.47  45
PPM 073921     08:42:04.3 +31:11:36 10.8  0.37  45
54598          08:40:53.6 +31:27:47 14.7        45
Positions are for J2000

Event circumstances last updated at 2024/06/21 21:25:33 UT

RECON