RECON: TNO occultation with 160427

Event between (160427) 05RL43 and star GA1000:00766243 with event index number of 1967315

Geocentric closest approach at 2027/02/18 02:11:45 UTC

J2000 position of star is 05:25:10.5 +10:56:19
Equinox of date position of star is 05:26:30.3 +10:57:31
Stellar brightness G=15.8, 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 88% illuminated.
Apparent brightness V=22.0

[RECON map]
Object is 24.8 AU from the Sun and 24.5 AU from the Earth.
Apparent velocity is 8.4 km/sec on the sky relative to the star, or, 1.7 arcsec/hr.
The 1-sigma error in the time of the event is 117 seconds.
The 1-sigma cross-track error in the shadow position is 1126 km.
The sky-plane scale is 17733.6 km/arcsec.

The object has an absolute magnitude Hv=7.9
Diameter=155.6 km assuming a 5% albedo -- 18.3 sec chord
Diameter=63.5 km assuming a 30% albedo -- 7.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 160427, (2027/02/18 02:11UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:56:38.5 +07:24:35  0.4  8.20  28
Bellatrix      05:26:35.3 +06:22:19  1.6  4.59  34
18 Ori         05:17:34.7 +11:22:11  5.6  2.27  33
PPM 120908     05:25:24.3 +11:06:24  8.2  0.35  32
PPM 120930     05:26:30.3 +11:08:58  9.3  0.19  32
160427         05:26:40.8 +10:57:40 15.8        31
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 15.4 km RECON observability=0.1 and success probability=4.2%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	02:17:44	-18.5	Dark	Up	48.7	172.6	Up	02:07:31 - 02:27:56	-1668
Kamloops	02:19:05	-9.6	NT	Up	47.3	151.8	Up	02:08:52 - 02:29:17	-2391
Kelowna	02:18:55	-10.1	NT	Up	48.3	152.6	Up	02:08:42 - 02:29:07	-2421
Peachland	02:18:57	-9.9	NT	Up	48.3	152.1	Up	02:08:45 - 02:29:10	-2442
Summerland	02:18:56	-9.9	NT	Up	48.4	152.1	Up	02:08:43 - 02:29:08	-2451
Penticton	02:18:55	-10.0	NT	Up	48.5	152.3	Up	02:08:42 - 02:29:07	-2451
Oliver	02:18:53	-10.0	NT	Up	48.8	152.1	Up	02:08:41 - 02:29:06	-2481
Anarchist Mountain Observatory	02:18:51	-10.1	NT	Up	49.1	152.2	Up	02:08:39 - 02:29:04	-2486
Dunrhomin	02:16:26	-19.3	Dark	Up	60.4	171.0	Up	02:06:14 - 02:26:39	-2494
Nikitin	02:16:23	-19.3	Dark	Up	60.6	170.9	Up	02:06:10 - 02:26:35	-2509
CU-SBO	02:16:25	-19.2	Dark	Up	60.6	170.7	Up	02:06:12 - 02:26:37	-2519
Okanogan	02:18:50	-9.8	NT	Up	49.6	151.6	Up	02:08:37 - 02:29:02	-2550
Brewster	02:18:49	-9.7	NT	Up	49.7	151.1	Up	02:08:37 - 02:29:02	-2581
Manson/Chelan	02:18:52	-9.4	NT	Up	49.8	150.5	Up	02:08:39 - 02:29:04	-2614
Wenatchee	02:18:51	-9.2	NT	Up	50.1	149.9	Up	02:08:38 - 02:29:03	-2662
Victoria	02:19:15	-7.4	NT	Up	48.1	146.4	Up	02:09:02 - 02:29:27	-2698
Ellensburg	02:18:50	-9.0	NT	Up	50.4	149.4	Up	02:08:38 - 02:29:03	-2706
PNWRO	02:18:35	-10.0	NT	Up	51.8	151.1	Up	02:08:23 - 02:28:48	-2717
Yakima	02:18:49	-9.0	NT	Up	50.8	149.1	Up	02:08:36 - 02:29:01	-2742
Toppenish/White Swan	02:18:46	-9.0	NT	Up	51.0	149.2	Up	02:08:34 - 02:28:59	-2753
The Dalles	02:18:48	-8.4	NT	Up	51.4	147.5	Up	02:08:36 - 02:29:01	-2854
Maupin	02:18:46	-8.4	NT	Up	51.8	147.4	Up	02:08:33 - 02:28:58	-2886
Sisters	02:18:45	-7.9	NT	Up	52.3	146.0	Up	02:08:33 - 02:28:58	-2984
Bend	02:18:42	-8.1	NT	Up	52.6	146.2	Up	02:08:29 - 02:28:54	-2993
Oregon Observatory	02:18:43	-7.9	NT	Up	52.7	145.9	Up	02:08:30 - 02:28:55	-3014
Chiloquin	02:18:39	-7.4	NT	Up	53.6	144.3	Up	02:08:27 - 02:28:52	-3149
Cedarville	02:18:22	-8.5	NT	Up	55.1	145.9	Up	02:08:10 - 02:28:35	-3161
Klamath Falls	02:18:37	-7.4	NT	Up	53.9	144.1	Up	02:08:24 - 02:28:49	-3176
Fall River/Burney	02:18:30	-7.5	NT	Up	55.0	143.7	Up	02:08:17 - 02:28:42	-3262
Gimple	02:18:20	-7.7	NT	Up	56.0	143.6	Up	02:08:07 - 02:28:32	-3317
Reno	02:18:11	-8.4	NT	Up	56.9	144.7	Up	02:07:58 - 02:28:23	-3318
Greenville	02:18:21	-7.7	NT	Up	55.9	143.5	Up	02:08:09 - 02:28:34	-3321
Portola	02:18:16	-8.0	NT	Up	56.4	143.9	Up	02:08:04 - 02:28:29	-3326
Yerington	02:18:02	-8.8	NT	Up	57.6	145.2	Up	02:07:49 - 02:28:14	-3334
Quincy	02:18:20	-7.6	NT	Up	56.1	143.3	Up	02:08:07 - 02:28:32	-3339
Hawthorne	02:17:54	-9.1	NT	Up	58.2	145.6	Up	02:07:41 - 02:28:06	-3348
Carson City	02:18:10	-8.4	NT	Up	57.2	144.4	Up	02:07:57 - 02:28:22	-3348
Patrick	02:17:02	-12.4	AT	Up	62.8	150.9	Up	02:06:50 - 02:27:15	-3367
Gardnerville	02:18:05	-8.3	NT	Up	57.4	144.2	Up	02:07:52 - 02:28:17	-3368
Beatty	02:17:35	-10.3	NT	Up	60.4	147.2	Up	02:07:23 - 02:27:48	-3394
George/Scottsdale	02:16:35	-13.8	AT	Up	65.0	153.2	Up	02:06:23 - 02:26:48	-3400
Lee Vining	02:17:55	-8.7	NT	Up	58.5	144.3	Up	02:07:43 - 02:28:08	-3423
Laughlin/Bullhead City	02:17:04	-11.8	NT	Up	62.7	149.3	Up	02:06:52 - 02:27:17	-3427
Bishop	02:17:48	-9.1	NT	Up	59.3	144.9	Up	02:07:35 - 02:28:00	-3438
Lake Havasu City	02:17:00	-11.9	NT	Up	63.4	149.1	Up	02:06:48 - 02:27:13	-3471
Yuma	02:16:51	-11.4	NT	Up	64.8	146.4	Up	02:06:39 - 02:27:04	-3645
Calipatria	02:17:00	-10.7	NT	Up	64.0	145.2	Up	02:06:47 - 02:27:12	-3657
Idyllwild	02:17:13	-9.9	NT	Up	63.0	143.8	Up	02:07:00 - 02:27:25	-3669
Wildwood	02:17:30	-8.4	NT	Up	61.8	140.9	Up	02:07:18 - 02:27:43	-3739

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 160427, (2027/02/18 02:11UT)
Object            RA         Dec     mag  sep  mel
Betelgeuse     05:55:10.3 +07:24:26  0.4  8.20  28
Bellatrix      05:25:07.8 +06:20:58  1.6  4.59  34
18 Ori         05:16:04.1 +11:20:29  5.6  2.27  33
PPM 120908     05:23:53.8 +11:05:01  8.2  0.35  32
PPM 120930     05:24:59.8 +11:07:37  9.3  0.19  32
160427         05:25:10.5 +10:56:19 15.8        32
Positions are for J2000

Event circumstances last updated at 2023/12/23 04:27:16 UT

RECON