RECON: TNO occultation with 55638

Event between (55638) 02VE95 and star GA0940:02538143 with event index number of 2250357

Geocentric closest approach at 2027/04/07 02:54:23 UTC

J2000 position of star is 07:13:40.4 +05:52:25
Equinox of date position of star is 07:14:57.9 +05:49:51
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 92 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=20.8

[RECON map]
Object is 32.0 AU from the Sun and 32.0 AU from the Earth.
Apparent velocity is 9.2 km/sec on the sky relative to the star, or, 1.4 arcsec/hr.
The 1-sigma error in the time of the event is 263 seconds.
The 1-sigma cross-track error in the shadow position is 2581 km.
The sky-plane scale is 23181.6 km/arcsec.

The object has an absolute magnitude Hv=5.6
Diameter=524.8 km assuming a 5% albedo -- 49.9 sec chord
Diameter=214.3 km assuming a 30% albedo -- 20.4 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 55638, (2027/04/07 02:54UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:38.9 +07:24:35  0.4 19.55  72
Alhena         06:39:17.2 +16:22:25  1.9 13.72  81
PPM 152128     07:13:18.6 +05:36:26  6.0  0.50  91
PPM 152245     07:16:42.3 +05:46:08  6.9  0.40  92
PPM 152168     07:14:43.6 +05:45:21  9.0  0.12  92
55638          07:15:07.7 +05:49:31 16.9        92
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 3.4 sigma about the mid-time.
The median site spacing is 0.0 km RECON observability=0.1 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)
Victoria	03:01:48	-2.5	CT	Up	46.7	192.8	Up	02:46:48 - 03:16:48	4747
Kamloops	03:02:14	-3.9	CT	Down	44.1	196.7	Up	02:47:14 - 03:17:14	4679
Peachland	03:02:10	-4.5	CT	Down	44.9	197.7	Up	02:47:10 - 03:17:10	4592
Kelowna	03:02:10	-4.7	CT	Down	44.7	198.1	Up	02:47:10 - 03:17:10	4580
Summerland	03:02:07	-4.6	CT	Down	45.0	197.9	Up	02:47:07 - 03:17:07	4578
Penticton	03:02:10	-4.7	CT	Down	45.0	198.1	Up	02:47:10 - 03:17:10	4567
Oliver	03:02:04	-4.8	CT	Down	45.4	198.1	Up	02:47:04 - 03:17:04	4547
Anarchist Mountain Observatory	03:02:05	-5.0	CT	Down	45.5	198.5	Up	02:47:05 - 03:17:05	4526
Manson/Chelan	03:01:53	-4.7	CT	Down	46.7	197.7	Up	02:46:53 - 03:16:53	4510
Okanogan	03:02:03	-5.0	CT	Down	46.2	198.4	Up	02:47:03 - 03:17:03	4502
Brewster	03:02:01	-5.0	CT	Down	46.5	198.2	Up	02:47:01 - 03:17:01	4499
Wenatchee	03:01:55	-4.8	CT	Down	47.2	197.6	Up	02:46:55 - 03:16:55	4494
Ellensburg	03:01:49	-4.7	CT	Down	47.7	197.4	Up	02:46:49 - 03:16:49	4484
Yakima	03:01:42	-4.8	CT	Down	48.1	197.4	Up	02:46:42 - 03:16:42	4462
The Dalles	03:01:34	-4.6	CT	Down	49.2	196.8	Up	02:46:34 - 03:16:34	4446
Toppenish/White Swan	03:01:46	-5.0	CT	Down	48.2	197.8	Up	02:46:46 - 03:16:46	4439
Maupin	03:01:34	-4.8	CT	Down	49.5	197.1	Up	02:46:34 - 03:16:34	4415
Sisters	03:01:26	-4.6	CT	Down	50.5	196.6	Up	02:46:26 - 03:16:26	4398
Bend	03:01:21	-4.9	CT	Down	50.7	197.1	Up	02:46:21 - 03:16:21	4368
Oregon Observatory	03:01:23	-4.8	CT	Down	50.9	196.9	Up	02:46:23 - 03:16:23	4366
PNWRO	03:01:50	-6.1	NT	Down	48.2	200.1	Up	02:46:50 - 03:16:50	4322
Chiloquin	03:01:12	-4.8	CT	Down	52.2	196.7	Up	02:46:12 - 03:16:12	4320
Klamath Falls	03:01:09	-4.9	CT	Down	52.5	196.9	Up	02:46:09 - 03:16:09	4295
Fall River/Burney	03:01:01	-5.5	CT	Down	53.6	198.0	Up	02:46:01 - 03:16:01	4201
Cedarville	03:01:12	-6.3	NT	Down	52.8	199.8	Up	02:46:12 - 03:16:12	4144
Greenville	03:00:56	-6.0	NT	Down	54.3	199.1	Up	02:45:56 - 03:15:56	4117
Gimple	03:00:58	-6.1	NT	Down	54.3	199.2	Up	02:45:58 - 03:15:58	4111
Quincy	03:00:57	-6.1	NT	Down	54.5	199.2	Up	02:45:57 - 03:15:57	4105
Portola	03:00:57	-6.4	NT	Down	54.5	200.0	Up	02:45:57 - 03:15:57	4063
Reno	03:00:57	-7.0	NT	Down	54.6	201.2	Up	02:45:57 - 03:15:57	4001
Carson City	03:00:55	-7.1	NT	Down	54.9	201.4	Up	02:45:55 - 03:15:55	3978
Sleaford	03:03:17	-11.9	NT	Down	38.8	214.9	Up	02:48:17 - 03:18:17	3975
Gardnerville	03:00:53	-7.2	NT	Down	55.1	201.6	Up	02:45:53 - 03:15:53	3960
Yerington	03:00:57	-7.6	NT	Down	54.9	202.6	Up	02:45:57 - 03:15:57	3921
Lee Vining	03:00:48	-7.9	NT	Down	55.9	203.2	Up	02:45:48 - 03:15:48	3856
Hawthorne	03:00:55	-8.1	NT	Down	55.2	203.7	Up	02:45:55 - 03:15:55	3854
Bishop	03:00:47	-8.6	NT	Down	56.2	204.8	Up	02:45:47 - 03:15:47	3766
Beatty	03:00:51	-10.0	NT	Down	56.0	207.8	Up	02:45:51 - 03:15:51	3618
Wildwood	03:00:21	-9.2	NT	Down	59.2	206.4	Up	02:45:21 - 03:15:21	3580
Idyllwild	03:00:29	-10.8	NT	Down	58.8	210.1	Up	02:45:29 - 03:15:29	3414
Laughlin/Bullhead City	03:00:48	-12.2	AT	Down	56.6	212.7	Up	02:45:48 - 03:15:48	3346
Patrick	03:00:55	-12.7	AT	Down	56.1	213.7	Up	02:45:55 - 03:15:55	3311
Calipatria	03:00:29	-12.0	NT	Down	58.8	212.7	Up	02:45:29 - 03:15:29	3285
Lake Havasu City	03:00:45	-12.6	AT	Down	57.1	213.6	Up	02:45:45 - 03:15:45	3283
Yuma	03:00:29	-12.8	AT	Down	58.7	214.6	Up	02:45:29 - 03:15:29	3189
Dunrhomin	03:02:14	-17.5	AT	Down	47.9	222.6	Up	02:47:14 - 03:17:14	3057
George/Scottsdale	03:00:51	-14.8	AT	Down	56.5	218.3	Up	02:45:51 - 03:15:51	3049
CU-SBO	03:02:10	-17.6	AT	Down	48.1	222.6	Up	02:47:10 - 03:17:10	3045
Nikitin	03:02:11	-17.6	AT	Down	48.0	222.7	Up	02:47:11 - 03:17:11	3045

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 55638, (2027/04/07 02:54UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4 19.55  72
Alhena         06:37:42.8 +16:23:57  1.9 13.72  81
PPM 152128     07:11:51.4 +05:39:16  6.0  0.50  91
PPM 152245     07:15:15.0 +05:49:06  6.9  0.40  92
PPM 152168     07:13:16.3 +05:48:14  9.0  0.12  92
55638          07:13:40.4 +05:52:25 16.9        92
Positions are for J2000

Event circumstances last updated at 2024/03/05 05:07:53 UT

RECON