RECON: TNO occultation with 8405

Event between (8405) Asbolus and star GA1300:03300318 with event index number of 1330971

Geocentric closest approach at 2023/12/01 10:44:14 UTC

J2000 position of star is 06:03:06.5 +41:36:51
Equinox of date position of star is 06:04:48.2 +41:36:43
Stellar brightness G=16.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 29 degrees from the moon. Moon is 83% illuminated.
Apparent brightness V=23.2

[RECON map]
Object is 25.0 AU from the Sun and 24.1 AU from the Earth.
Apparent velocity is 24.4 km/sec on the sky relative to the star, or, 5.0 arcsec/hr.
The 1-sigma error in the time of the event is 118 seconds.
The 1-sigma cross-track error in the shadow position is 968 km.
The sky-plane scale is 17465.2 km/arcsec.

The object has an absolute magnitude Hv=9.2
Diameter=91.2 km assuming a 5% albedo -- 3.6 sec chord
Diameter=37.2 km assuming a 30% albedo -- 1.5 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 

Star training set for 8405, (2023/12/01 10:44UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:46:46.7 +27:57:59  1.1 24.84   4
34Bet Aur      06:01:17.1 +44:56:50  1.9  3.40  31
38 Aur         06:05:01.4 +42:54:30  6.1  1.30  30
PPM 048688     06:04:49.3 +41:57:51  8.2  0.35  29
PPM 048680     06:04:29.9 +41:22:01  9.1  0.25  29
8405           06:04:48.5 +41:36:43 16.9        29
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 25.4 km RECON observability=1.0 and success probability=71.0%

Site	Site mid-time (UT)	Sun alt (deg)	Sky	Moon	Star alt (deg)	Star az (deg)	Target	Observing Time (UT)	X-track (km)
Sleaford	10:42:56	-36.8	Dark	Up	64.8	259.1	Up	10:32:37 - 10:53:14	1884
Kamloops	10:43:27	-45.7	Dark	Up	73.7	244.0	Up	10:33:09 - 10:53:46	1321
Kelowna	10:43:24	-45.5	Dark	Up	73.5	248.0	Up	10:33:05 - 10:53:42	1262
Peachland	10:43:24	-45.7	Dark	Up	73.7	247.8	Up	10:33:06 - 10:53:43	1243
Summerland	10:43:24	-45.7	Dark	Up	73.7	248.5	Up	10:33:05 - 10:53:42	1231
Penticton	10:43:23	-45.7	Dark	Up	73.7	248.8	Up	10:33:05 - 10:53:42	1227
Oliver	10:43:23	-45.8	Dark	Up	73.8	250.0	Up	10:33:04 - 10:53:41	1191
Anarchist Mountain Observatory	10:43:22	-45.8	Dark	Up	73.7	250.8	Up	10:33:03 - 10:53:40	1179
Okanogan	10:43:21	-46.1	Dark	Up	74.1	252.6	Up	10:33:03 - 10:53:40	1107
Brewster	10:43:21	-46.4	Dark	Up	74.3	253.2	Up	10:33:03 - 10:53:40	1074
Manson/Chelan	10:43:22	-46.7	Dark	Up	74.6	253.4	Up	10:33:03 - 10:53:40	1043
Victoria	10:43:32	-48.4	Dark	Up	76.4	245.8	Up	10:33:13 - 10:53:50	1025
Wenatchee	10:43:21	-46.9	Dark	Up	74.8	254.8	Up	10:33:03 - 10:53:40	990
Ellensburg	10:43:21	-47.2	Dark	Up	75.1	256.0	Up	10:33:03 - 10:53:40	942
Yakima	10:43:21	-47.4	Dark	Up	75.2	257.5	Up	10:33:02 - 10:53:39	899
PNWRO	10:43:15	-46.5	Dark	Up	74.2	261.5	Up	10:32:57 - 10:53:34	886
Toppenish/White Swan	10:43:20	-47.4	Dark	Up	75.1	258.5	Up	10:33:01 - 10:53:38	882
Dunrhomin	10:42:26	-37.8	Dark	Up	63.9	284.5	Up	10:32:07 - 10:52:44	802
Nikitin	10:42:26	-37.8	Dark	Up	63.9	284.8	Up	10:32:07 - 10:52:44	783
The Dalles	10:43:21	-48.1	Dark	Up	75.8	260.5	Up	10:33:02 - 10:53:39	780
CU-SBO	10:42:25	-37.9	Dark	Up	63.9	284.9	Up	10:32:07 - 10:52:44	774
Maupin	10:43:20	-48.2	Dark	Up	75.8	262.2	Up	10:33:01 - 10:53:38	740
Sisters	10:43:20	-48.8	Dark	Up	76.2	265.2	Up	10:33:01 - 10:53:38	635
Bend	10:43:19	-48.7	Dark	Up	76.1	266.4	Up	10:33:00 - 10:53:37	618
Oregon Observatory	10:43:19	-48.9	Dark	Up	76.2	267.0	Up	10:33:00 - 10:53:37	596
Chiloquin	10:43:18	-49.6	Dark	Up	76.5	272.1	Up	10:32:59 - 10:53:36	448
Klamath Falls	10:43:17	-49.6	Dark	Up	76.4	273.6	Up	10:32:59 - 10:53:36	414
Cedarville	10:43:11	-48.7	Dark	Up	75.2	277.0	Up	10:32:53 - 10:53:30	389
Fall River/Burney	10:43:14	-49.7	Dark	Up	76.0	278.5	Up	10:32:56 - 10:53:33	302
Gimple	10:43:11	-49.5	Dark	Up	75.4	282.1	Up	10:32:53 - 10:53:30	224
Greenville	10:43:11	-49.6	Dark	Up	75.5	282.1	Up	10:32:53 - 10:53:30	222
Portola	10:43:09	-49.3	Dark	Up	75.1	283.3	Up	10:32:51 - 10:53:28	202
Quincy	10:43:11	-49.7	Dark	Up	75.5	282.8	Up	10:32:53 - 10:53:30	201
Reno	10:43:07	-48.9	Dark	Up	74.5	284.2	Up	10:32:48 - 10:53:25	194
Carson City	10:43:06	-49.0	Dark	Up	74.4	285.5	Up	10:32:48 - 10:53:25	158
Yerington	10:43:04	-48.5	Dark	Up	73.9	286.1	Up	10:32:45 - 10:53:22	158
Gardnerville	10:43:06	-49.0	Dark	Up	74.3	286.3	Up	10:32:47 - 10:53:24	134
Hawthorne	10:43:01	-48.2	Dark	Up	73.4	287.5	Up	10:32:43 - 10:53:20	127
Lee Vining	10:43:02	-48.7	Dark	Up	73.6	289.4	Up	10:32:44 - 10:53:21	53
Beatty	10:42:53	-47.0	Dark	Up	71.5	291.9	Up	10:32:34 - 10:53:11	23
Bishop	10:42:59	-48.2	Dark	Up	72.8	291.1	Up	10:32:40 - 10:53:17	15
Patrick	10:42:41	-44.9	Dark	Up	68.8	294.8	Up	10:32:23 - 10:53:00	-23
Laughlin/Bullhead City	10:42:43	-45.5	Dark	Up	69.2	295.6	Up	10:32:25 - 10:53:02	-74
George/Scottsdale	10:42:32	-43.3	Dark	Up	66.6	297.9	Up	10:32:14 - 10:52:51	-114
Lake Havasu City	10:42:41	-45.3	Dark	Up	68.7	297.1	Up	10:32:23 - 10:53:00	-133
Idyllwild	10:42:48	-47.3	Dark	Up	70.1	300.1	Up	10:32:29 - 10:53:06	-299
Calipatria	10:42:43	-46.4	Dark	Up	68.9	300.8	Up	10:32:24 - 10:53:01	-317
Yuma	10:42:39	-45.6	Dark	Up	68.1	301.2	Up	10:32:21 - 10:52:58	-326
Wildwood	10:42:54	-48.8	Dark	Up	71.6	300.4	Up	10:32:36 - 10:53:13	-328

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, (2023/12/01 10:44UT)
Object            RA         Dec     mag  sep  mel
Pollux         07:45:17.9 +28:01:33  1.1 24.84   4
34Bet Aur      05:59:31.6 +44:56:51  1.9  3.40  31
38 Aur         06:03:18.2 +42:54:39  6.1  1.30  30
PPM 048688     06:03:07.0 +41:57:59  8.2  0.35  29
PPM 048680     06:02:48.2 +41:22:08  9.1  0.25  29
8405           06:03:06.5 +41:36:51 16.9        29
Positions are for J2000

Event circumstances last updated at 2023/11/06 05:16:10 UT

RECON