RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:03023928 with event index number of 1242386

Geocentric closest approach at 2023/02/02 07:04:38 UTC

J2000 position of star is 05:41:04.4 +41:20:03
Equinox of date position of star is 05:42:42.2 +41:20:39
Stellar brightness G=15.7, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 16 degrees from the moon. Moon is 89% illuminated.
Apparent brightness V=23.2

[RECON map]
Object is 24.5 AU from the Sun and 23.9 AU from the Earth.
Apparent velocity is 18.0 km/sec on the sky relative to the star, or, 3.8 arcsec/hr.
The 1-sigma error in the time of the event is 136 seconds.
The 1-sigma cross-track error in the shadow position is 1324 km.
The sky-plane scale is 17300.8 km/arcsec.

The object has an absolute magnitude Hv=9.2
Diameter=91.2 km assuming a 5% albedo -- 4.8 sec chord
Diameter=37.2 km assuming a 30% albedo -- 2.0 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2023/02/02 07:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:37:14.9 +16:33:14  0.8 28.51  27
34Bet Aur      06:01:13.4 +44:56:50  1.9  4.94  18
PPM 048217     05:35:07.4 +42:07:23  6.2  1.62  18
PPM 048329     05:40:46.7 +41:22:09  7.1  0.36  17
PPM 048351     05:42:41.4 +41:22:17  9.6  0.03  16
8405           05:42:42.5 +41:20:39 15.7        16
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 39.2 km RECON observability=1.0 and success probability=43.3%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	07:01:30	-54.6	Dark	Up	57.1	269.7	Up	06:49:38 - 07:13:22	664
Kamloops	07:02:18	-53.2	Dark	Up	66.0	259.6	Up	06:50:26 - 07:14:10	433
Kelowna	07:02:15	-54.2	Dark	Up	65.6	262.3	Up	06:50:23 - 07:14:07	342
Peachland	07:02:16	-54.2	Dark	Up	65.8	262.3	Up	06:50:24 - 07:14:08	330
Summerland	07:02:16	-54.3	Dark	Up	65.8	262.7	Up	06:50:24 - 07:14:08	313
Penticton	07:02:15	-54.4	Dark	Up	65.7	262.9	Up	06:50:23 - 07:14:07	306
Oliver	07:02:15	-54.7	Dark	Up	65.7	263.7	Up	06:50:23 - 07:14:07	266
Anarchist Mountain Observatory	07:02:14	-55.0	Dark	Up	65.6	264.3	Up	06:50:22 - 07:14:06	247
Victoria	07:02:29	-53.9	Dark	Up	68.3	261.6	Up	06:50:37 - 07:14:21	201
Okanogan	07:02:15	-55.4	Dark	Up	65.8	265.5	Up	06:50:23 - 07:14:07	176
Brewster	07:02:16	-55.6	Dark	Up	66.0	265.9	Up	06:50:24 - 07:14:08	146
Manson/Chelan	07:02:17	-55.7	Dark	Up	66.2	266.1	Up	06:50:25 - 07:14:09	123
Wenatchee	07:02:18	-56.0	Dark	Up	66.4	267.0	Up	06:50:26 - 07:14:10	70
Ellensburg	07:02:19	-56.3	Dark	Up	66.5	267.8	Up	06:50:27 - 07:14:11	24
Yakima	07:02:19	-56.6	Dark	Up	66.6	268.7	Up	06:50:27 - 07:14:11	-21
Toppenish/White Swan	07:02:18	-56.8	Dark	Up	66.5	269.3	Up	06:50:26 - 07:14:10	-45
PNWRO	07:02:12	-57.7	Dark	Up	65.4	271.2	Up	06:50:20 - 07:14:04	-86
The Dalles	07:02:21	-57.2	Dark	Up	67.0	270.6	Up	06:50:29 - 07:14:13	-130
Maupin	07:02:21	-57.6	Dark	Up	66.9	271.6	Up	06:50:29 - 07:14:13	-177
Sisters	07:02:23	-58.1	Dark	Up	67.2	273.4	Up	06:50:31 - 07:14:15	-274
Bend	07:02:22	-58.4	Dark	Up	67.0	274.1	Up	06:50:30 - 07:14:14	-301
Oregon Observatory	07:02:23	-58.5	Dark	Up	67.1	274.5	Up	06:50:31 - 07:14:15	-320
Chiloquin	07:02:25	-59.3	Dark	Up	67.3	277.4	Up	06:50:33 - 07:14:17	-465
Klamath Falls	07:02:24	-59.6	Dark	Up	67.2	278.2	Up	06:50:32 - 07:14:16	-503
Cedarville	07:02:18	-60.9	Dark	Up	65.9	280.4	Up	06:50:26 - 07:14:10	-583
Dunrhomin	07:01:18	-66.4	Dark	Up	54.8	287.5	Up	06:49:26 - 07:13:10	-621
Fall River/Burney	07:02:23	-60.7	Dark	Up	66.7	281.1	Up	06:50:31 - 07:14:15	-635
Nikitin	07:01:18	-66.6	Dark	Up	54.7	287.8	Up	06:49:26 - 07:13:10	-641
CU-SBO	07:01:18	-66.7	Dark	Up	54.8	287.8	Up	06:49:26 - 07:13:10	-649
Greenville	07:02:21	-61.6	Dark	Up	66.2	283.2	Up	06:50:29 - 07:14:13	-736
Gimple	07:02:21	-61.7	Dark	Up	66.1	283.3	Up	06:50:29 - 07:14:13	-736
Quincy	07:02:22	-61.8	Dark	Up	66.1	283.7	Up	06:50:30 - 07:14:14	-758
Portola	07:02:20	-62.1	Dark	Up	65.7	284.1	Up	06:50:28 - 07:14:12	-773
Reno	07:02:17	-62.6	Dark	Up	65.2	284.8	Up	06:50:25 - 07:14:09	-802
Carson City	07:02:17	-62.9	Dark	Up	65.1	285.5	Up	06:50:25 - 07:14:09	-842
Yerington	07:02:14	-63.4	Dark	Up	64.6	286.0	Up	06:50:22 - 07:14:06	-864
Gardnerville	07:02:17	-63.1	Dark	Up	65.0	286.0	Up	06:50:25 - 07:14:09	-869
Hawthorne	07:02:12	-64.0	Dark	Up	64.0	287.1	Up	06:50:20 - 07:14:04	-914
Lee Vining	07:02:15	-64.2	Dark	Up	64.2	288.1	Up	06:50:23 - 07:14:07	-977
Bishop	07:02:12	-65.0	Dark	Up	63.5	289.3	Up	06:50:20 - 07:14:04	-1042
Beatty	07:02:05	-66.2	Dark	Up	62.1	290.3	Up	06:50:13 - 07:13:57	-1089
Patrick	07:01:52	-68.7	Dark	Up	59.5	292.9	Up	06:50:00 - 07:13:44	-1239
Laughlin/Bullhead City	07:01:55	-68.6	Dark	Up	59.9	293.3	Up	06:50:03 - 07:13:47	-1270
Lake Havasu City	07:01:55	-69.3	Dark	Up	59.4	294.4	Up	06:50:03 - 07:13:47	-1341
Wildwood	07:02:14	-67.3	Dark	Up	62.4	295.3	Up	06:50:22 - 07:14:06	-1399
George/Scottsdale	07:01:44	-71.0	Dark	Up	57.3	295.5	Up	06:49:52 - 07:13:36	-1408
Idyllwild	07:02:05	-68.6	Dark	Up	60.9	295.7	Up	06:50:13 - 07:13:57	-1434
Calipatria	07:02:00	-69.7	Dark	Up	59.7	296.5	Up	06:50:08 - 07:13:52	-1495
Yuma	07:01:57	-70.5	Dark	Up	58.9	297.1	Up	06:50:05 - 07:13:49	-1538

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 8405, (2023/02/02 07:05UT)
Object            RA         Dec     mag  sep  mel
Aldebaran      04:35:55.3 +16:30:29  0.8 28.51  27
34Bet Aur      05:59:31.6 +44:56:51  1.9  4.94  18
PPM 048217     05:33:28.7 +42:06:32  6.2  1.62  18
PPM 048329     05:39:08.6 +41:21:29  7.1  0.36  17
PPM 048351     05:41:03.3 +41:21:40  9.6  0.03  16
8405           05:41:04.4 +41:20:03 15.7        16
Positions are for J2000

Event circumstances last updated at 2023/01/09 03:28:27 UT

RECON