RECON: TNO occultation with 118228

Event between (118228) 96TQ66 and star GA1260:01762766 with event index number of 2111222

Geocentric closest approach at 2027/04/04 02:59:51 UTC

J2000 position of star is 05:10:06.9 +36:42:04
Equinox of date position of star is 05:11:45.0 +36:43:47
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 99 degrees from the moon. Moon is 9% illuminated.
Apparent brightness V=23.0

[RECON map]
Object is 36.1 AU from the Sun and 36.5 AU from the Earth.
Apparent velocity is 17.9 km/sec on the sky relative to the star, or, 2.4 arcsec/hr.
The 1-sigma error in the time of the event is 399 seconds.
The 1-sigma cross-track error in the shadow position is 3894 km.
The sky-plane scale is 26446.2 km/arcsec.

The object has an absolute magnitude Hv=7.2
Diameter=224.9 km assuming a 5% albedo -- 12.4 sec chord
Diameter=91.8 km assuming a 30% albedo -- 5.1 sec chord
Dynamical classification is 3:2E
 
 
 
 
 
 

Star training set for 118228, (2027/04/04 03:00UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:29.3 +16:33:43  0.8 21.57  90
3Iot Aur       04:58:46.4 +33:12:24  2.7  4.44  96
PPM 070048     05:15:08.3 +37:22:00  6.5  0.90 100
PPM 069986     05:11:47.1 +37:02:12  8.3  0.31  99
PPM 069991     05:12:01.6 +36:33:48  8.8  0.17  99
118228         05:11:57.3 +36:44:00 16.9        99
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 2.3 sigma about the mid-time.
The median site spacing is 14.6 km RECON observability=0.1 and success probability=1.7%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	03:02:00	-12.6	AT	Down	49.4	269.8	Up	02:47:00 - 03:17:00	9890
Kamloops	03:01:37	-4.6	CT	Down	58.6	259.1	Up	02:46:37 - 03:16:37	9187
Kelowna	03:01:43	-5.4	CT	Down	58.1	261.3	Up	02:46:43 - 03:16:43	9160
Peachland	03:01:42	-5.2	CT	Down	58.3	261.2	Up	02:46:42 - 03:16:42	9139
Summerland	03:01:43	-5.3	CT	Down	58.3	261.5	Up	02:46:43 - 03:16:43	9131
Penticton	03:01:44	-5.4	CT	Down	58.2	261.8	Up	02:46:44 - 03:16:44	9130
Dunrhomin	03:02:59	-18.3	Dark	Down	47.3	283.7	Up	02:47:59 - 03:17:59	9112
Oliver	03:01:44	-5.5	CT	Down	58.3	262.3	Up	02:46:44 - 03:16:44	9102
Anarchist Mountain Observatory	03:01:45	-5.7	CT	Down	58.2	262.8	Up	02:46:45 - 03:16:45	9097
Nikitin	03:02:57	-18.4	Dark	Down	47.3	283.9	Up	02:47:57 - 03:17:57	9097
CU-SBO	03:02:58	-18.4	Dark	Down	47.3	283.9	Up	02:47:58 - 03:17:58	9088
Okanogan	03:01:48	-5.7	CT	Down	58.4	263.6	Up	02:46:48 - 03:16:48	9037
Brewster	03:01:50	-5.7	CT	Down	58.5	263.9	Up	02:46:50 - 03:16:50	9006
Manson/Chelan	03:01:50	-5.5	CT	Down	58.8	263.9	Up	02:46:50 - 03:16:50	8974
Wenatchee	03:01:51	-5.5	CT	Down	59.0	264.6	Up	02:46:51 - 03:16:51	8928
Victoria	03:01:38	-3.2	CT	Down	60.9	259.8	Up	02:46:38 - 03:16:38	8889
Ellensburg	03:01:51	-5.4	CT	Down	59.1	265.1	Up	02:46:51 - 03:16:51	8885
PNWRO	03:02:01	-6.8	NT	Down	58.0	268.0	Up	02:47:01 - 03:17:01	8878
Yakima	03:01:52	-5.5	CT	Down	59.2	265.7	Up	02:46:52 - 03:16:52	8851
Toppenish/White Swan	03:01:54	-5.7	CT	Down	59.1	266.2	Up	02:46:54 - 03:16:54	8841
The Dalles	03:01:56	-5.4	CT	Down	59.7	266.9	Up	02:46:56 - 03:16:56	8742
Maupin	03:01:59	-5.5	CT	Down	59.6	267.7	Up	02:46:59 - 03:16:59	8712
Sisters	03:02:00	-5.4	CT	Down	60.0	268.9	Up	02:47:00 - 03:17:00	8617
Bend	03:02:02	-5.6	CT	Down	59.8	269.5	Up	02:47:02 - 03:17:02	8609
Oregon Observatory	03:02:01	-5.6	CT	Down	59.9	269.7	Up	02:47:01 - 03:17:01	8588
Chiloquin	03:02:06	-5.6	CT	Down	60.2	271.7	Up	02:47:06 - 03:17:06	8458
Cedarville	03:02:15	-7.1	NT	Down	58.8	274.5	Up	02:47:15 - 03:17:15	8449
Klamath Falls	03:02:08	-5.7	CT	Down	60.1	272.4	Up	02:47:08 - 03:17:08	8432
Fall River/Burney	03:02:14	-6.3	NT	Down	59.7	274.6	Up	02:47:14 - 03:17:14	8350
Reno	03:02:25	-7.9	NT	Down	58.3	277.9	Up	02:47:25 - 03:17:25	8298
Gimple	03:02:19	-6.9	NT	Down	59.2	276.4	Up	02:47:19 - 03:17:19	8298
Greenville	03:02:19	-6.9	NT	Down	59.3	276.4	Up	02:47:19 - 03:17:19	8294
Portola	03:02:21	-7.3	NT	Down	58.8	277.2	Up	02:47:21 - 03:17:21	8289
Yerington	03:02:29	-8.5	NT	Down	57.7	279.1	Up	02:47:29 - 03:17:29	8284
Quincy	03:02:20	-6.9	NT	Down	59.2	276.7	Up	02:47:20 - 03:17:20	8277
Hawthorne	03:02:31	-9.0	NT	Down	57.2	280.1	Up	02:47:31 - 03:17:31	8271
Carson City	03:02:26	-8.0	NT	Down	58.2	278.5	Up	02:47:26 - 03:17:26	8269
Patrick	03:02:57	-13.6	AT	Down	52.7	286.1	Up	02:47:57 - 03:17:57	8261
Gardnerville	03:02:27	-8.1	NT	Down	58.2	278.9	Up	02:47:27 - 03:17:27	8250
George/Scottsdale	03:03:10	-15.8	AT	Down	50.6	288.6	Up	02:48:10 - 03:18:10	8232
Beatty	03:02:43	-10.9	NT	Down	55.4	283.2	Up	02:47:43 - 03:17:43	8230
Laughlin/Bullhead City	03:02:56	-13.1	AT	Down	53.2	286.2	Up	02:47:56 - 03:17:56	8202
Lee Vining	03:02:32	-8.8	NT	Down	57.5	280.7	Up	02:47:32 - 03:17:32	8198
Bishop	03:02:36	-9.5	NT	Down	56.8	281.9	Up	02:47:36 - 03:17:36	8184
Lake Havasu City	03:02:59	-13.5	AT	Down	52.8	287.1	Up	02:47:59 - 03:17:59	8159
Yuma	03:03:06	-13.8	AT	Down	52.5	289.3	Up	02:48:06 - 03:18:06	7990
Calipatria	03:03:01	-13.0	AT	Down	53.3	288.6	Up	02:48:01 - 03:18:01	7977
Idyllwild	03:02:56	-11.8	NT	Down	54.5	287.5	Up	02:47:56 - 03:17:56	7964
Wildwood	03:02:49	-10.2	NT	Down	56.1	286.7	Up	02:47:49 - 03:17:49	7892

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 118228, (2027/04/04 03:00UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 21.57  90
3Iot Aur       04:56:59.6 +33:09:58  2.7  4.44  96
PPM 070048     05:13:17.2 +37:20:12  6.5  0.90 100
PPM 069986     05:09:56.4 +37:00:16  8.3  0.31  99
PPM 069991     05:10:11.4 +36:31:53  8.8  0.17  99
118228         05:10:06.9 +36:42:04 16.9        99
Positions are for J2000

Event circumstances last updated at 2024/03/21 22:32:14 UT

RECON