RECON: TNO occultation with 55636

Event between (55636) 02TX300 and star GA1280:00443864 with event index number of 1307838

Geocentric closest approach at 2023/07/10 08:29:34 UTC

J2000 position of star is 01:55:04.5 +38:25:23
Equinox of date position of star is 01:56:27.0 +38:32:06
Stellar brightness G=16.5, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 32 degrees from the moon. Moon is 47% illuminated.
Apparent brightness V=20.0

[RECON map]
Object is 43.2 AU from the Sun and 43.5 AU from the Earth.
Apparent velocity is 19.9 km/sec on the sky relative to the star, or, 2.3 arcsec/hr.
The 1-sigma error in the time of the event is 83 seconds.
The 1-sigma cross-track error in the shadow position is 1700 km.
The sky-plane scale is 31560.2 km/arcsec.

The object has an absolute magnitude Hv=3.5
Diameter=1169.5 km assuming a 5% albedo -- 59.6 sec chord
Diameter=477.5 km assuming a 30% albedo -- 24.3 sec chord
Dynamical classification is SCATEXTD
 
 
 
 
 
 

Star training set for 55636, (2023/07/10 08:30UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:16.4 +16:33:17  0.8 41.39  49
57Gam1And      02:05:21.2 +42:26:29  2.3  4.25  36
58 And         02:09:55.0 +37:58:10  4.8  2.70  32
PPM 066702     01:53:57.0 +38:05:59  8.4  0.66  31
PPM 066743     01:56:17.4 +38:24:00  9.3  0.14  32
55636          01:56:28.9 +38:32:15 16.5        32
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 4.9 km RECON observability=1.0 and success probability=3.5%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Wildwood	08:29:22	-33.2	Dark	Up	19.0	55.9	Really Low	08:21:59 - 08:36:45	3587
Idyllwild	08:29:16	-33.3	Dark	Up	20.1	56.5	Low	08:21:53 - 08:36:39	3542
Lee Vining	08:29:41	-29.4	Dark	Up	20.8	56.9	Low	08:22:18 - 08:37:04	3521
Bishop	08:29:37	-30.0	Dark	Up	21.0	57.0	Low	08:22:14 - 08:37:00	3516
Calipatria	08:29:11	-33.7	Dark	Up	20.6	56.8	Low	08:21:48 - 08:36:34	3514
Gardnerville	08:29:47	-28.5	Dark	Up	21.0	56.9	Low	08:22:24 - 08:37:10	3510
Quincy	08:29:55	-27.6	Dark	Up	20.8	56.7	Low	08:22:32 - 08:37:18	3509
Carson City	08:29:49	-28.3	Dark	Up	21.1	57.0	Low	08:22:26 - 08:37:12	3505
Greenville	08:29:56	-27.4	Dark	Up	20.9	56.7	Low	08:22:33 - 08:37:19	3504
Portola	08:29:53	-27.7	Dark	Up	21.0	56.9	Low	08:22:30 - 08:37:16	3503
Gimple	08:29:56	-27.4	Dark	Up	20.9	56.8	Low	08:22:33 - 08:37:19	3502
Reno	08:29:50	-27.9	Dark	Up	21.3	57.1	Low	08:22:27 - 08:37:13	3496
Yerington	08:29:46	-28.4	Dark	Up	21.4	57.2	Low	08:22:23 - 08:37:09	3495
Hawthorne	08:29:43	-28.8	Dark	Up	21.5	57.3	Low	08:22:20 - 08:37:06	3494
Yuma	08:29:06	-34.0	Dark	Up	20.9	57.0	Low	08:21:43 - 08:36:29	3492
Fall River/Burney	08:30:01	-26.6	Dark	Up	21.1	56.8	Low	08:22:38 - 08:37:24	3486
Beatty	08:29:31	-30.2	Dark	Up	21.8	57.6	Low	08:22:08 - 08:36:54	3483
Klamath Falls	08:30:07	-25.4	Dark	Up	21.5	57.0	Low	08:22:44 - 08:37:30	3457
Lake Havasu City	08:29:14	-32.2	Dark	Up	22.2	57.7	Low	08:21:51 - 08:36:37	3456
Laughlin/Bullhead City	08:29:18	-31.6	Dark	Up	22.3	57.8	Low	08:21:55 - 08:36:41	3452
Chiloquin	08:30:09	-25.1	Dark	Up	21.7	57.1	Low	08:22:46 - 08:37:32	3447
Cedarville	08:30:00	-26.0	Dark	Up	22.1	57.6	Low	08:22:37 - 08:37:23	3445
Patrick	08:29:17	-31.2	Dark	Up	23.0	58.2	Low	08:21:54 - 08:36:40	3426
Oregon Observatory	08:30:14	-23.7	Dark	Up	22.6	57.8	Low	08:22:51 - 08:37:37	3393
George/Scottsdale	08:29:05	-32.5	Dark	Up	23.4	58.3	Low	08:21:42 - 08:36:28	3385
Bend	08:30:15	-23.5	Dark	Up	22.8	57.9	Low	08:22:52 - 08:37:38	3384
Sisters	08:30:16	-23.3	Dark	Up	22.8	57.9	Low	08:22:53 - 08:37:39	3380
Maupin	08:30:35	-22.4	Dark	Up	23.6	58.5	Low	08:23:12 - 08:37:58	3353
The Dalles	08:30:35	-22.0	Dark	Up	23.8	58.6	Low	08:23:12 - 08:37:58	3335
Toppenish/White Swan	08:30:35	-21.2	Dark	Up	24.6	59.3	Low	08:23:12 - 08:37:58	3287
Yakima	08:30:35	-21.0	Dark	Up	24.6	59.3	Low	08:23:12 - 08:37:58	3280
PNWRO	08:30:35	-21.4	Dark	Up	25.3	60.0	Low	08:23:12 - 08:37:58	3279
Ellensburg	08:30:35	-20.6	Dark	Up	24.9	59.5	Low	08:23:12 - 08:37:58	3261
Victoria	08:30:38	-19.2	Dark	Up	24.0	58.4	Low	08:23:15 - 08:38:01	3241
Wenatchee	08:30:35	-20.1	Dark	Up	25.2	59.8	Low	08:23:12 - 08:37:58	3238
Manson/Chelan	08:30:35	-19.7	Dark	Up	25.5	60.1	Low	08:23:12 - 08:37:58	3213
Brewster	08:30:35	-19.4	Dark	Up	25.9	60.4	Low	08:23:12 - 08:37:58	3196
Okanogan	08:30:35	-19.1	Dark	Up	26.1	60.6	Low	08:23:12 - 08:37:58	3180
Anarchist Mountain Observatory	08:30:35	-18.5	Dark	Up	26.5	61.0	Low	08:23:12 - 08:37:58	3147
Oliver	08:30:35	-18.3	Dark	Up	26.5	61.0	Low	08:23:12 - 08:37:58	3143
Penticton	08:30:35	-18.0	AT	Up	26.7	61.2	Low	08:23:12 - 08:37:58	3127
Summerland	08:30:35	-17.9	AT	Up	26.7	61.1	Low	08:23:12 - 08:37:58	3126
Peachland	08:30:36	-17.8	AT	Up	26.7	61.1	Low	08:23:13 - 08:37:59	3121
Kelowna	08:30:36	-17.6	AT	Up	26.9	61.4	Low	08:23:13 - 08:37:59	3110
Kamloops	08:30:41	-16.9	AT	Up	26.8	61.2	Low	08:23:18 - 08:38:04	3090
CU-SBO	08:29:22	-24.8	Dark	Up	31.2	63.9	Up	08:21:59 - 08:36:45	3019
Nikitin	08:29:22	-24.7	Dark	Up	31.2	63.9	Up	08:21:59 - 08:36:45	3014
Dunrhomin	08:29:23	-24.6	Dark	Up	31.3	64.0	Up	08:22:00 - 08:36:46	3009
Sleaford	08:30:35	-13.6	AT	Up	35.6	71.0	Up	08:23:12 - 08:37:58	2667

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 55636, (2023/07/10 08:30UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 41.39  49
57Gam1And      02:03:54.0 +42:19:46  2.3  4.25  36
58 And         02:08:29.5 +37:51:32  4.8  2.70  32
PPM 066702     01:52:33.0 +37:59:04  8.4  0.66  31
PPM 066743     01:54:53.1 +38:17:07  9.3  0.14  32
55636          01:55:04.5 +38:25:23 16.5        32
Positions are for J2000

Event circumstances last updated at 2022/12/24 03:43:35 UT

RECON